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Second announcement of 20,000 t/a cesium hydroxide octahydrate and 40,000 t/a "sulfuric acid" barium sulfate change project

Second announcement of 20,000 t/a cesium hydroxide octahydrate and 40,000 t/a "sulfuric acid" barium sulfate change project

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  • Time of issue:2010-11-03
  • Views:4

Second announcement of 20,000 t/a cesium hydroxide octahydrate and 40,000 t/a "sulfuric acid" barium sulfate change project

  • Categories:news
  • Author:
  • Origin:
  • Time of issue:2010-11-03
  • Views:4
Information

Guizhou Red Star Development Co., Ltd. 20,000 t / a octahydrate ytterbium hydroxide and 40,000 t / a "sulfuric acid" barium sulphate change project was first announced on November 8, 2016 in the company's factory area and surrounding areas, According to the "Environmental Protection Law of the People's Republic of China" and the relevant provisions of the "Interim Measures for Public Participation in Environmental Impact Assessment" issued by the State Environmental Protection Administration on February 14, 2006, the construction of the project is related to environmental protection. The second public announcement was made to gain a broad understanding of the public's attitude towards the construction of the project and the opinions and suggestions on environmental protection. The public's supervision was accepted. The publicity contents are as follows:

I. Construction project situation

The company's 20,000 t/a octahydrate barium hydroxide project and the 40,000 t/a "sulfuric acid" barium sulfate project were approved by the Anshun Environmental Protection Bureau in July and November 2011 respectively. Due to market and other reasons, the actual construction and operation of the 20,000 t/a ytterbium hydroxide octahydrate and 40,000 t/a "sulfuric acid" barium sulfate project are different from the original environmental assessment. At the same time, due to the earlier construction time of the company, the scale of the converter equipment in the plant and the supporting equipment for strontium carbonate and sulfur production have been continuously adjusted. In addition, the company will implement the more stringent "Inorganic Chemical Industry Pollutant Emission Standards" (GB31573-2015) standard (implemented in July 2017), so this EIA will be based on the actual production situation of the company, the production operation equipment of the whole plant and Re-evaluation of environmental protection facilities, etc., propose corrective measures for environmental protection facilities that cannot meet the requirements.

Second, the project pollutant prevention and control measures

1. Countermeasures and measures for exhaust gas prevention and control

1) Raw material section barite crushing dust

After the barite crushing dust is treated by the existing bag dust removal facility (the dust removal efficiency can reach 99.9%), it can reach the limit requirement of Table (3) of the “Inorganic Chemical Industry Pollutant Emission Standard” (GB31573-2015), consisting of 1 15m high exhaust pipe discharge.

2) Raymond grinding dust in the barium sulfide workshop

The large bituminous coal Raymond grinding dust can be treated by the existing bag dust removal facility (dedusting efficiency up to 99.9%) to reach the "Integrated Emission Standard of Air Pollutants" (GB16297-1996). (2) Unorganized emission monitoring concentration limit Requirements.

3) Converter flue gas and sulfur workshop exhaust

1#, 2# and 4# converter flue gas is treated by the modified 1# desulfurization and dust removal system (the treatment process of “new electrostatic precipitator + lime-gypsum desulfurization + water vapor separation tower”), soot in the flue gas The treatment efficiency is increased to 99.5% or more, and the treatment efficiency of SO2 is increased to 97% or more. The treated 1#, 2# and 4# converter flue gas can meet the requirements of Table (3) of the “Inorganic Chemical Industry Pollutant Emission Standard” (GB31573-2015), and is discharged through the chimney of 1#60m height.

3# and 5# converter flue gas and sulfur workshop exhaust gas after the transformation of 2# desulfurization and dust removal system ("newly replaced electrostatic dedusting + lime - gypsum desulfurization + water vapor separation tower" treatment process), smoke in the flue gas The processing efficiency is increased to 99.5% or more, and the processing efficiency of SO2 is increased to 97% or more. The treated 3# and 5# converter flue gas and sulfur workshop exhaust gas can meet the requirements of Table (3) of the “Inorganic Chemical Industry Pollutant Emission Standard” (GB31573-2015), and are discharged through the chimney of 2#60m height.

4) Hot air furnace flue gas in the dewatering section of the strontium carbonate finished product workshop

In the dewatering section of the strontium carbonate finished product workshop, the desulfurization is carried out by means of desulfurization of the fuel coal with lime and flue gas and limestone spray. After the hot air furnace flue gas in the upper dewatering section is treated by the multi-tube cyclone dust collector + limestone lime spray spray desulfurization facility (the treatment efficiency of soot and SO2 is 99%, 70%, respectively), it can reach the pollutant discharge of inorganic chemical industry. Standard (GB31573-2015) Table (3) limit requirements, discharged through a 50m high chimney (where the climbing flue is 22m high and the chimney is 28m high).

5) Drying dust in the dewatering section of the strontium carbonate finished product workshop

After the dewatering section of the strontium carbonate finished product workshop is treated by cyclone dust removal + bag dust removal facilities (dust removal efficiency up to 99.9%), it can meet the limit requirements of Table (3) of "Inorganic Chemical Industry Pollutant Emission Standards" (GB31573-2015). Discharged from the 50m high exhaust pipe together with the upper dehydrated hot blast stove flue gas.

6) The hot water furnace flue gas in the dewatering section of the finished product of strontium carbonate

In the dewatering section of the strontium carbonate finished product workshop, the desulfurization is carried out by means of desulfurization of the fuel coal with lime and flue gas desulfurization tower lime spray. The hot air furnace flue gas in the lower dewatering section is treated by the multi-tube cyclone dust collector + desulfurization tower lime spray spray desulfurization facility (the treatment efficiency of soot and SO2 is 99%, 70%, respectively), which can reach the pollutant discharge of inorganic chemical industry. The standard (GB31573-2015) table (3) limit requirements, through the 80m high chimney emissions (where the climbing flue is 20m high, the chimney is 60m high).

7) Drying dust of the dewatering section of the finished product of the strontium carbonate finished product workshop

After the dewatering section of the strontium carbonate finished product workshop is treated by cyclone dust removal + bag dust removal facilities (dust removal efficiency up to 99.9%), it can meet the limit requirements of Table (3) of "Inorganic Chemical Industry Pollutant Emission Standards" (GB31573-2015). Discharged from the 80m high exhaust pipe together with the dehydrated hot blast stove flue gas.

8) strontium carbonate finished product product crushed and screened dust

After crushing and screening dust of strontium carbonate finished product, it can reach the limit of “Inorganic Chemical Industry Pollutant Emission Standard” (GB31573-2015) Table (3) after treatment by cyclone dust removal + bag dust removal facility (dust removal efficiency up to 99.9%). , discharged through a 15m high exhaust pipe.

9) Synthesis of reaction kettle exhaust in thiourea workshop

The H2S in the tail gas of the synthesis reactor of the thiourea workshop is absorbed by the thiourea mother liquor circulation absorption device (treatment efficiency 80%), which can meet the limit requirements of Table (3) of the “Inorganic Chemical Industry Pollutant Emission Standard” (GB31573-2015). Discharged from a 15m high exhaust.

10) strontium chloride workshop reactor tank waste gas

The reaction volume of the reaction tank of the ruthenium chloride workshop is 3000Nm3/h, mainly containing CO2 and a small amount of HCl gas. After removing a small amount of HCl gas through the cesium carbonate slurry absorption tank, it is completely transported to the compression section of the cesium carbonate production workshop as a raw material. Used in the production of barium carbonate by carbonization towers.

11) Chlorinated bismuth workshop hydrochloric acid storage tank unorganized waste gas

The cesium chloride workshop hydrochloric acid storage tank will have HCl gas through the breathing valve without tissue evaporation, taking oil sealing measures to reduce the volatilization of HCl gas, and the HCl gas has no tissue volatile amount of 0.004kg/h. By adding 1 absorption tank, the HCl gas discharged from the hydrochloric acid tank breathing valve is introduced into the absorption tank for water absorption (treatment efficiency 60%), and the unorganized emission of HCl gas is 0.0016kg/h, which can reach the inorganic chemical industry pollutants. Emission Standards (GB31573-2015) Table (5) Requirements for the limits of air pollutant emissions at the boundary of enterprises.

12) Chromium chloride workshop product crushing dust

The crushed dust of the ruthenium chloride workshop product can reach the limit value of Table (3) of "Inorganic Chemical Industry Pollutant Emission Standard" (GB31573-2015) after being treated by cyclone dust removal + bag dust removal facility (dedusting efficiency up to 99.9%). 15m high exhaust pipe discharge.

13) High-purity 钡 workshop reaction tank waste gas

The reaction volume of the reaction tank of the ruthenium chloride workshop is 2000Nm3/h, mainly containing CO2 and a small amount of nitric acid mist. After removing a small amount of nitric acid mist through the cesium carbonate slurry absorption tank, all of them are transported to the compression section of the strontium carbonate production workshop as raw materials. Used in the production of barium carbonate by carbonization towers.

14) High-purity 钡 workshop product crushing dust

After high-purity 钡 workshop product crushing dust is treated by cyclone dust removal + bag dust removal facilities (dust removal efficiency up to 99.9%), it can meet the limit requirements of Table (3) of "Inorganic Chemical Industry Pollutant Emission Standards" (GB31573-2015). 15m high exhaust pipe discharge.

15) Synthetic waste gas in high purity 钡 workshop

There will be a small amount of NH3 produced during the synthesis of high-purity cesium carbonate in the high-purity bismuth workshop. After absorption by water in the absorption tank (treatment efficiency 60%), there is no tissue discharge, which can reach the "Inorganic Chemical Industry Pollutant Emission Standard" (GB31573-2015) Table (5) Requirements for emission limits of air pollutants at the boundary of enterprises.

16) Unorganized discharge of nitric acid storage tanks in high-purity 钡 workshop

The NO2 gas in the high-purity sputum workshop will have NO2 gas volatilized through the breathing valve. Oil seal measures will be taken to reduce the volatilization of NO2 gas. The unorganized emission of NO2 gas is 0.002kg/h, which can reach the "Integrated Emission Standard for Air Pollutants". (GB16297-1996) Table (2) Requirements for the concentration limit of unorganized emission monitoring.

17) Industrial slag comprehensive utilization production of building materials workshop fly ash silo dust

The dust generation of fly ash silo is 5kg/h. After dust removal by the bag filter at the top of the silo, the dust emission is 0.05kg/h, which can reach the "Integrated Emission Standard for Air Pollutants" (GB16297-1996). Table (2) Requirements for unconserved emission monitoring concentration limits.

18) Industrial slag comprehensive utilization production of building materials workshop cement silo dust

The dust emission of cement silo is 4kg/h. After dust removal by the bag filter at the top of the silo, the dust emission is 0.04kg/h, and the maximum concentration of unorganized emission monitoring at the boundary of the plant is 0.711mg/Nm3. Meet the requirements of the “Integrated Emission Standards for Air Pollutants” (GB16297-1996) (2) Unconserved emission monitoring concentration limits.

19) Industrial slag comprehensive utilization production of building materials workshop mixer dust

In the process of fly ash and cement entering the mixer, there will be a small amount of dust. After taking measures of water spray humidification and dust removal, the impact on the environment is small.

20) 20,000 tons of "glaube method" barium sulfate workshop hot air furnace flue gas

The 20,000-ton "Mall-salt method" barium sulfate workshop hot-steam furnace adopts the method of desulfurization by means of fuel coal with lime desulfurization + flue gas desulfurization tower lime milk spray. The hot blast stove flue gas is treated by the multi-tube cyclone dust collector + desulfurization tower lime milk desulfurization facility (shared with the flue gas generated by the other three hot blast stoves in the lower dewatering section) (the treatment efficiencies of soot and SO2 are 99% and 70%, respectively). ), can meet the requirements of Table (3) of the "Inorganic Chemical Industry Pollutant Emission Standards" (GB31573-2015), and discharge from the 80m high exhaust pipe together with the flue gas of the dehydration section of the finished product of the strontium carbonate finished product. The slope flue is 20m high and the chimney is 60m high).

21) 20,000 tons of "glaube method" barium sulfate workshop product drying dust

The 20,000-ton "Mall-salt method" barium sulfate workshop product drying dust can be reached in the "Inorganic Chemical Industry Pollutant Emission Standard" (GB31573-2015) Table (3) after being treated by bag dust removal facilities (dust removal efficiency up to 99.9%). The value requirement is discharged from the 80m high exhaust pipe together with the flue gas of the dehydration section of the strontium carbonate finished product workshop.

22) 20,000 tons of "glaronite method" barium sulfate workshop film machine unorganized waste gas

The low-concentration sodium sulfide solution of the 20,000-ton "Mall-salt method" barium sulfate workshop is concentrated by a four-effect evaporator to prepare a 60% concentrated solution, and then the obtained product is cooled by a filming machine. Since sodium sulfide is alkaline, a concentrated solution will react with carbon dioxide and water in the air to form a small amount of H2S gas when it is cooled on the filming machine. The H2S unorganized emission is 0.001 kg/h, which can reach the inorganic Chemical Industry Pollutant Emission Standards (GB31573-2015) Table (5) Requirements for the limits of air pollutant emissions at the boundary of enterprises.

23) 25t/h coal-fired boiler flue gas

The 25t/h coal-fired boiler flue gas is treated by “electrostatic dust removal + lime-gypsum desulfurization + water vapor separation tower” (the treatment efficiency of soot and SO2 is 99.54%, 97%, respectively), which can reach the boiler air pollutant emission standard. (GB13271-2014) Table (1) The emission limit requirements are discharged through a 60m high chimney.

2. Waste water

1) Initial rain

Rainwater drainage ditch is added to the southwest of the power plant in the front of the plant. The rainwater in the front of the plant is directly discharged to the south side of the hardware warehouse through the newly added drainage ditch. The 1200m3 initial rainwater pool is added to the south side of the plant to collect the production area. The first 10 minutes of initial rain. The rainwater is discharged directly from the factory.

2) Production wastewater and domestic sewage in the plant area

At present, the production wastewater and domestic sewage in the production plant area of ​​the enterprise are mixed and discharged into the sewage treatment station of the plant for treatment. The existing sewage treatment station in the plant has low treatment efficiency of COD and NH3-N in the domestic sewage, resulting in discharge of the sewage treatment station in the plant. The concentration of COD and NH3-N in the wastewater cannot meet the limit requirements of Table (3) of the “Inorganic Chemical Industry Pollutant Emission Standard” (GB31573-2015). At the same time, the existing sewage treatment stations in the plant also have problems such as low automation and high work intensity of workers. This evaluation requires the addition of a set of buried buried integrated domestic sewage treatment facilities in the production plant area to treat the domestic sewage in the production plant area separately; the existing sewage treatment station in the plant area is used to treat the production wastewater in the plant area and the existing sewage in the plant area. The processing station is upgraded. After the treatment wastewater in the plant area is treated by the sewage treatment station after the transformation of the plant area, it is used as supplementary water for converter flue gas desulfurization and boiler flue gas desulfurization. The remaining wastewater reaches the “Inorganic Chemical Industry Pollutant Emission Standard” (GB31573-2015). The water pollutant discharge limit is discharged into the Longtan River. The domestic sewage in the plant area is treated by the newly added underground integrated sewage treatment facility in the plant area, and reaches the Grade B standard of GB18918-2002 “Emission Standard for Pollutants in Urban Sewage Treatment Plants” and is discharged into Longtan River. The domestic sewage in the living quarters of the staff is treated by the domestic sewage treatment station set up in the staff living area (using the treatment process of “A/O+ constructed wetland”, the design scale is 100m3/d), and the pollutants discharged from the municipal sewage treatment plant are obtained in GB18918-2002. Standard "Level B standard, discharged into the Longtan River.

3. Solid waste

In the production process of the factory, bag collection and dust collection is used as raw material utilization or product sales; thiourea workshop reaction liquid filter slag is used as desulfurization agent for flue gas desulfurization; industrial slag comprehensive utilization production building materials workshop brick waste return production device is used as raw material Converter flue gas desulfurization slag, hot blast stove and boiler flue gas desulfurization dust removal slag and coal slag are sold to cement plant as raw materials for comprehensive utilization; slag slag slag is used as raw material for building materials after harmless treatment; The converter flue gas electrostatic precipitator collects the dust into a spherical shape and returns to the converter as a raw material comprehensive utilization; the ruthenium chloride workshop refined filter slag, the high-purity bismuth salt workshop refined filter slag, the mirabilite method, the sulphate sulphate workshop slag and the plant sewage treatment station The sludge and filter residue are sent to the Duguan slag yard for safe disposal; the waste engine oil is regularly disposed of by qualified units; the sludge and domestic garbage generated by the domestic sewage treatment facilities are disposed of by the local sanitation department.

4, noise

The noise pollution source crusher, compressor, cooling tower, fan and water pump in the plant will produce 75~105dB(A) noise. After adopting sound insulation and vibration reduction measures, it will have less impact on the surrounding environment of the plant.

Third, the main points of environmental impact assessment

After the pollutants discharged from the company's plant area are improved according to the environmental protection measures required by this evaluation, they can be discharged to the standard, will not change the existing environmental quality functions and levels, and can achieve the unity of economic and environmental benefits, so from environmental protection From the perspective of the implementation of this project is feasible.

IV. Ways and deadlines for access to environmental impact reports

The public can check the website within 10 days after the announcement.

V. Scope and main issues for public comment

Scope: Individuals and units affected by the project directly or indirectly around the project, individuals and units concerned with the construction of the project, relevant experts and relevant administrative departments.

Main items: 1 public attitude towards the project and the site selection of the project; 2 environmental issues of greatest concern to the public and attitudes towards the environmental impacts; 3 aspects of the public's perceived beneficial performance of the project; 4 the public believes that the project The impact of its life, work, study and health; 5 other opinions and suggestions on improving the environment.

Red Star centuries, cast Evergreen Foundation

Anshun, Guizhou Province China Ding County town Flag Town

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