CN110272151B - Comprehensive treatment and recovery device and treatment and recovery method for gasified grey water - Google Patents
Comprehensive treatment and recovery device and treatment and recovery method for gasified grey water Download PDFInfo
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- CN110272151B CN110272151B CN201910685574.XA CN201910685574A CN110272151B CN 110272151 B CN110272151 B CN 110272151B CN 201910685574 A CN201910685574 A CN 201910685574A CN 110272151 B CN110272151 B CN 110272151B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/60—Silicon compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/169—Integration of gasification processes with another plant or parts within the plant with water treatments
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
本发明属于一种气化灰水综合处理回收装置以及处理回收方法；包括与气化系统相连的灰水澄清槽，灰水澄清槽上清液出口通过灰水槽的第一进口、第五三通以及与2#灰水泵与气化系统的灰水循环系统相连；第五三通的第三端通过1#灰水泵、1#换热器与加药反应池一侧的进口相连，加药反应池另一侧的出口通过1#提升泵与澄清槽相连，澄清槽上部的溢流口与清液槽相连，清液槽通过2#提升泵和第一三通与污水处理系统相连，第一三通通过第二三通与灰水槽的第二进口相连；具有能够保证气化装置长周期稳定运行的前提下有效去除灰水中的Ca2+，Mg2+，Si2+离子、降低灰水硬度、实现灰水的循环利用、降低灰水设备和管线的结垢速率的优点。
The invention belongs to a comprehensive treatment and recovery device for gasified gray water and a treatment and recovery method; it includes a gray water clarification tank connected to a gasification system, and the supernatant liquid outlet of the gray water clarification tank passes through the first inlet and the fifth tee of the gray water tank. And it is connected to the gray water circulation system of the 2# gray water pump and the gasification system; the third end of the fifth tee is connected to the inlet on one side of the dosing reaction tank through the 1# gray water pump and the 1# heat exchanger. The dosing reaction tank The outlet on the other side is connected to the clarification tank through the 1# lifting pump. The overflow port on the upper part of the clarification tank is connected to the clear liquid tank. The clear liquid tank is connected to the sewage treatment system through the 2# lifting pump and the first tee. The first and third It is connected to the second inlet of the gray water tank through the second tee; it can effectively remove Ca 2+ , Mg 2+ , and Si 2+ ions in the gray water and reduce the hardness of the gray water while ensuring the long-term stable operation of the gasification device. , realize the recycling of gray water and reduce the scaling rate of gray water equipment and pipelines.
Description
Technical Field
The invention belongs to the technical field of gasified grey water utilization devices, and particularly relates to a comprehensive treatment and recovery device and a treatment and recovery method for gasified grey water.
Background
At present, the treatment of waste liquid in the chemical industry is always a bottleneck for restricting the development of enterprises, the waste water generated by a gasification device accounts for 40-60% of the total waste water amount of the chemical enterprises produced by coal gasification, and the production process is as follows: the coal charged into the furnace contains a certain amount of SiO 2 、Fe 2 O 3 、Al 2 O 3 And the substances enter the black water along with the gas washing water after being combusted in the coal water slurry pressurized gasifier, so that the concentration of suspended matters in the black water is 1000-4000 mg/L, and the concentration of suspended matters in the ash water after flocculation treatment is 20-100 mg/L. The gasified grey water is the blood of the gasification system, the quality of the water directly influences whether the gasification system can normally operate, in addition, the problem of scale formation of a grey water pipeline is always a difficult problem puzzling the industry, and the main factor influencing the scale formation of the grey water is that the total hardness of the grey water is high.
Ca exists in the water system of the coal water slurry gasification device 2+ ， Mg 2+ ， Si 2+ Etc. when they reach a certain concentration, they will react with HCO in water 3 － And CO 3 2－ The carbonic acid precipitate is formed by combination so as to generate scaling phenomenon, and CaCO is produced 3 Most common scale formation, caCO at high temperatures 3 Dissolving in water, caCO when water temperature is reduced 3 The crystal nucleus is resolved and grows continuously, and the crystal nucleus adheres to the inner wall of the pipeline and the equipment to form scale, and the scale can be formed at the same time The ash is coated in a large amount, so that the speed of forming the scale sheet becomes faster, the scale sheet becomes harder, great difficulty is caused to cleaning work, and especially the normal operation of a system is seriously influenced by pipeline blockage and the like caused by falling of the scale sheet.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the method which can effectively remove Ca in the grey water on the premise of ensuring the long-period stable operation of the gasification device 2+ ， Mg 2+ ， Si 2+ The gasification grey water comprehensive treatment recovery device and the treatment recovery method have the advantages of reducing the hardness of the grey water, realizing the recycling of the grey water and reducing the scaling rate of the grey water equipment and pipelines.
The purpose of the invention is realized in the following way: the device comprises a grey water clarifying tank connected with a gasification system, wherein a supernatant outlet of the grey water clarifying tank is connected with a grey water circulating system of the gasification system through a first inlet of the grey water tank, a fifth tee joint and a 2# grey water pump; the third end of the fifth tee joint is connected with an inlet on one side of the dosing reaction tank through a 1# ash water pump and a 1# heat exchanger, an outlet on the other side of the dosing reaction tank is connected with a clarifying tank through a 1# lifting pump, an overflow port on the upper part of the clarifying tank is connected with a clear liquid tank, the clear liquid tank is connected with a sewage treatment system through a 2# lifting pump and a first tee joint, and the first tee joint is connected with a second inlet of the ash water tank through a second tee joint; the solid waste liquid outlet at the lower part of the clarifying tank is connected with a filter pressing device through a sludge lifting pump, the solid outlet of the filter pressing device is communicated with a solid sludge treatment device, and the liquid outlet of the filter pressing device is connected with the third end of the second tee joint through a filtering liquid tank and a filtering liquid pump; the chemical adding reaction tank is internally provided with a first reaction zone, a second reaction zone and a third reaction zone which are communicated with each other, a 1# overflow baffle is arranged between the first reaction zone and the second reaction zone, a 2# overflow baffle is arranged between the second reaction zone and the third reaction zone, stirrers are respectively arranged in the first reaction zone, the second reaction zone and the third reaction zone, the top of the first reaction zone is provided with a ferrous sulfate chemical adding unit, and the top of the second reaction zone is provided with a sodium hydroxide chemical adding unit and a sodium carbonate chemical adding unit; the third reaction zone is communicated with a No. 1 lift pump.
Preferably, a third tee joint and a second valve are arranged between the No. 1 ash water pump and the No. 1 heat exchanger, a third valve and a fourth tee joint are arranged between the No. 1 heat exchanger and the dosing reaction tank, the third end of the third tee joint is connected with the third end of the fourth tee joint through the first valve, the No. 2 heat exchanger and the fourth valve in sequence, and the fourth tee joint is communicated with the first reaction zone in the dosing reaction tank.
Preferably, the 1# overflow baffle is arranged at the inner upper part of the chemical adding reaction tank, and the first reaction zone and the second reaction zone are communicated through the lower part of the 1# overflow baffle.
Preferably, the 2# overflow baffle is arranged at the inner bottom of the dosing reaction tank, and the second reaction zone and the third reaction zone are communicated through the upper part of the 2# overflow baffle.
Preferably, the stirrer comprises a stirring motor arranged at the top of the corresponding reaction zone, the stirring motor is connected with a stirring shaft, and stirring blades sleeved on the outer circumference of the stirring shaft are arranged in the corresponding reaction zone.
Preferably, the ferrous sulfate dosing unit comprises a ferrous sulfate storage tank, and the ferrous sulfate storage tank is communicated with a dosing port at the top of the first reaction zone through a No. 1 booster pump.
Preferably, the sodium hydroxide dosing unit comprises a sodium hydroxide storage tank, and the sodium hydroxide storage tank is communicated with a sodium hydroxide dosing port at the top of the second reaction zone through a No. 2 booster pump; the sodium carbonate dosing unit comprises a sodium carbonate storage tank, and the sodium carbonate storage tank is communicated with a sodium carbonate dosing port at the top of the second reaction zone through a No. 3 booster pump.
A treatment recovery method of a gasification grey water comprehensive treatment recovery device comprises the following steps:
step 1: the ash water of the gasification system is concentrated in an ash water clarifying tank, and after the ash water clarifying tank naturally settles, the supernatant enters the ash water tank in an overflow mode;
step 2: the ash water in the ash water tank enters a fifth tee joint, is divided into two paths after passing through the fifth tee joint, and one path enters a No. 2 ash water pump, is pressurized by the No. 2 ash water pump and is sent to an ash water circulation system of the gasification system for recycling; the other path is pressurized by a No. 1 gray water pump and then is sent into a third tee joint;
step 3: the ash water entering the third tee joint enters the No. 1 heat exchanger through the second valve to exchange heat, and the ash water after heat exchange enters the first reaction zone of the pressurized reaction tank through the fourth tee joint;
step 4: after the grey water enters the first reaction zone, the ferrous sulfate solution enters a 1# pressurizing pump through a ferrous sulfate storage tank to be pressurized, then enters the first reaction zone through a medicine adding port at the top of the first reaction zone, and simultaneously starts a stirrer in the first reaction zone; si in grey water is removed by reacting ferrous sulfate with the grey water 2+ Ions; the reaction in the first reaction zone can be accelerated by activating the agitator;
Step 5: the method comprises the steps that grey water enters a second reaction zone from the bottom of the first reaction zone after reacting in the first reaction zone, sodium hydroxide solution enters a 2# pressurizing pump through a sodium hydroxide storage tank to be pressurized, then enters the second reaction zone through a sodium hydroxide dosing port at the top of the second reaction zone, enters a 3# pressurizing pump through a sodium carbonate storage tank to be pressurized, then enters the second reaction zone through a sodium carbonate dosing port at the top of the second reaction zone, and simultaneously starts a stirrer in the second reaction zone; removing Ca in grey water by reacting sodium hydroxide and sodium carbonate with the grey water 2+ And Mg (magnesium) 2+ Ions; the reaction in the second reaction zone can be accelerated by activating the agitator;
step 6: the grey water enters a third reaction zone after reacting in the second reaction zone, and simultaneously, a stirrer in the third reaction zone is started, wherein the third reaction zone is an overflow zone, and overflowed grey water enters a clarifying tank through a No. 1 lifting pump to carry out natural sedimentation; the stirrer prevents the insoluble solid matters generated by the reaction from settling in advance;
step 7: after settling the ash water added with the medicine in the clarifying tank, enabling the supernatant to enter the supernatant tank through an overflow port, pressurizing the supernatant in the supernatant tank through a No. 2 lifting pump, then sending the supernatant into a first tee joint, dividing the supernatant into two paths at the first tee joint, sending one path of the supernatant to a sewage treatment system for deeper treatment, and sending the other path of the supernatant into the ash water tank through a second tee joint and a second inlet of the ash water tank, wherein the supernatant is mixed with the ash water in the ash water tank to reduce the hardness of the ash water and is recycled;
Step 8: after the ash water added with the medicine in the clarifying tank is settled, solid-containing waste liquid at the bottom enters a sludge lifting pump through a solid waste liquid outlet of the clarifying tank, is pressurized by the sludge lifting pump and then is sent into a filter pressing device for solid-liquid separation, and the solid enters a solid sludge treatment device through a solid outlet of the filter pressing device and is subjected to advanced treatment by the solid sludge treatment device; the liquid after filter pressing by the filter pressing device enters the filtrate tank through the liquid outlet of the filter pressing device, the filtrate in the filtrate tank is pressurized by the filter liquid pump and then is sent to the second tee joint, and the filtrate is converged with the gray water from the first tee joint and then enters the gray water tank through the second inlet of the gray water tank.
When the heat exchanger 1# in the step 3 is in a shutdown state, the second valve and the third valve 11 are closed, and the first valve and the fourth valve are opened; the ash water entering the third tee joint enters the No. 2 heat exchanger through the first valve to exchange heat, and the ash water after heat exchange enters the first reaction zone of the pressurized reaction tank through the fourth tee joint.
According to the gasification grey water comprehensive treatment recovery device and the treatment recovery method, which are manufactured according to the scheme, ca in the grey water can be effectively removed by arranging a dosing reaction tank, a dosing device, a flocculation sedimentation device, a filter pressing device and the like and adopting technical means such as dosing flocculation, clarification sedimentation, filtration squeezing and the like by combining the devices 2+ ， Mg 2+ ， Si 2+ Ions and part of the ion are recycled by a de-gasification system, and the gray water with the hardness of 1000mg/l is reduced to below 300 mg/l; the other part is discharged to a sewage system for advanced treatment, the solid precipitate is sent to a filter pressing device, is pressed into solid state, and is further treated and recycled in a drying mode and the like; the method reduces the hardness of the ash water of the gasification system, reduces the scaling speed of pipelines and equipment, improves the utilization rate of the ash water, and reduces the load of the sewage treatment process; has the advantages of simple structure, reasonable flow design and effective removal of Ca in grey water on the premise of ensuring long-period stable operation of the gasification device 2+ ， Mg 2+ ， Si 2+ Ion, reducing the hardness of grey water and realizingRecycling the grey water and reducing the scaling rate of the grey water equipment and pipelines.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
For a clearer understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals refer to like parts throughout the various views. For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product.
As shown in fig. 1, the invention is a gasification grey water comprehensive treatment recovery device and a treatment recovery method, wherein the device part comprises a grey water clarifying tank 1 connected with a gasification system 37, and a supernatant outlet of the grey water clarifying tank 1 is connected with a grey water circulation system of the gasification system 37 through a first inlet 2 of a grey water tank 3, a fifth tee 22 and a 2# grey water pump 32; the third end of the fifth tee 22 is connected with an inlet on one side of the dosing reaction tank 13 through a No. 1 gray water pump 5 and a No. 1 heat exchanger 9, an outlet on the other side of the dosing reaction tank 13 is connected with a clarifying tank 31 through a No. 1 lifting pump 29, an overflow port 33 on the upper part of the clarifying tank 31 is connected with a clear liquid tank 35, the clear liquid tank 35 is connected with a sewage treatment system 45 through a No. 2 lifting pump 36 and a first tee 44, and the first tee 44 is connected with a second inlet 4 of the gray water tank 3 through a second tee 46; the solid waste liquid outlet 30 at the lower part of the clarifying tank 31 is connected with the filter pressing device 38 through the sludge lifting pump 34, the solid outlet 39 of the filter pressing device 38 is communicated with the solid sludge treatment device 41, and the liquid outlet 40 of the filter pressing device 38 is connected with the third end of the second tee 46 through the filtrate tank 42 and the filtrate pump 43; the chemical adding reaction tank 13 is internally provided with a first reaction zone 14, a second reaction zone 15 and a third reaction zone 16 which are communicated, a No. 1 overflow baffle 17 is arranged between the first reaction zone 14 and the second reaction zone 15, a No. 2 overflow baffle 18 is arranged between the second reaction zone 15 and the third reaction zone 16, stirrers are respectively arranged in the first reaction zone 14, the second reaction zone 15 and the third reaction zone 16, the top of the first reaction zone 14 is provided with a ferrous sulfate chemical adding unit, and the top of the second reaction zone 15 is provided with a sodium hydroxide chemical adding unit and a sodium carbonate chemical adding unit; the third reaction zone 16 is in communication with a # 1 lift pump 29. A third tee joint 6 and a second valve 8 are arranged between the No. 1 gray water pump 5 and the No. 1 heat exchanger 9, a third valve 11 and a fourth tee joint 47 are arranged between the No. 1 heat exchanger 9 and the dosing reaction tank 13, the third end of the third tee joint 6 is connected with the third end of the fourth tee joint 47 through a first valve 7, a No. 2 heat exchanger 10 and a fourth valve 12 in sequence, and the fourth tee joint 47 is communicated with the first reaction zone 14 in the dosing reaction tank 13. The 1# overflow baffle 17 is arranged at the inner upper part of the chemical adding reaction tank 13, and the first reaction zone 14 and the second reaction zone 15 are communicated with each other through the lower part of the 1# overflow baffle 17. The 2# overflow baffle 18 is arranged at the inner bottom of the chemical adding reaction tank 13, and the second reaction zone 15 and the third reaction zone 16 are communicated with each other through the upper part of the 2# overflow baffle 18. The stirrer comprises a stirring motor 19 arranged at the top of a corresponding reaction zone, the stirring motor 19 is connected with a stirring shaft 20, and stirring blades 21 sleeved on the outer circumference of the stirring shaft 20 are arranged in the corresponding reaction zone. The ferrous sulfate dosing unit comprises a ferrous sulfate storage tank 23, and the ferrous sulfate storage tank 23 is communicated with a dosing port at the top of the first reaction zone 14 through a No. 1 booster pump 24. The sodium hydroxide dosing unit comprises a sodium hydroxide storage tank 25, and the sodium hydroxide storage tank 25 is communicated with a sodium hydroxide dosing port at the top of the second reaction zone 15 through a No. 2 booster pump 26; the sodium carbonate dosing unit comprises a sodium carbonate storage tank 27, and the sodium carbonate storage tank 27 is communicated with a sodium carbonate dosing port at the top of the second reaction zone 15 through a No. 3 booster pump 28.
A treatment recovery method of a gasification grey water comprehensive treatment recovery device comprises the following steps:
step 1: the ash water of the gasification system is concentrated in an ash water clarifying tank 1, and after the ash water clarifying tank 1 naturally subsides, the supernatant enters an ash water tank 3 in an overflow mode;
step 2: the grey water in the grey water tank 3 enters the fifth tee joint 22, is divided into two paths after passing through the fifth tee joint 22, and one path enters the No. 2 grey water pump 32 and is sent to the grey water circulation system of the gasification system 37 for recycling after being pressurized by the No. 2 grey water pump 32; the other path is pressurized by a No. 1 grey water pump 5 and then is sent into a third tee joint 6;
step 3: the grey water entering the third tee joint 6 enters the No. 1 heat exchanger 9 through the second valve 8 for heat exchange, and the grey water after heat exchange enters the first reaction zone 14 of the pressurized reaction tank 13 through the fourth tee joint 47;
step 4: after the grey water enters the first reaction zone 14, the ferrous sulfate solution enters a 1# pressurizing pump 24 through a ferrous sulfate storage tank 23 to be pressurized, then enters the first reaction zone 14 through a medicine adding port at the top of the first reaction zone 14, and simultaneously starts a stirrer 20 in the first reaction zone 14; si in grey water is removed by reacting ferrous sulfate with the grey water 2+ Ions; the reaction in the first reaction zone 14 can be accelerated by activating the agitator 20;
step 5: the grey water enters the second reaction zone 15 from the bottom of the first reaction zone 14 after reacting in the first reaction zone 14, sodium hydroxide solution enters the second reaction zone 15 from a sodium hydroxide dosing port at the top of the second reaction zone 15 after being pressurized in a 2# pressurizing pump 26 through a sodium hydroxide storage tank 25, sodium carbonate solution enters the second reaction zone 15 from a sodium carbonate dosing port at the top of the second reaction zone 15 after being pressurized in a 3# pressurizing pump 28 through a sodium carbonate storage tank 27, and simultaneously a stirrer in the second reaction zone 15 is started; removing Ca in grey water by reacting sodium hydroxide and sodium carbonate with the grey water 2+ And Mg (magnesium) 2+ Ions; the reaction in the second reaction zone 15 can be accelerated by activating the agitator 20;
step 6: the grey water enters a third reaction zone 16 after reacting in a second reaction zone 15, and simultaneously, a stirrer in the third reaction zone 16 is started, wherein the third reaction zone 16 is an overflow zone, and overflowed grey water enters a clarifying tank 31 through a No. 1 lifting pump 29 for natural sedimentation; the stirrer prevents the insoluble solid matters generated by the reaction from settling in advance;
step 7: after the ash water added with the medicine in the clarifying tank 31 is settled, the supernatant enters the supernatant tank 35 through the overflow port 33, the supernatant in the supernatant tank 35 is pressurized by the No. 2 lifting pump 36 and then is sent into the first tee joint 44, the first tee joint 44 is divided into two paths, one path is sent to the sewage treatment system 45 for deeper treatment, the other path enters the ash water tank 3 through the second tee joint 46 and the second inlet 4 of the ash water tank 3, and the supernatant is mixed with the ash water in the ash water tank 3 to reduce the hardness of the ash water and is recycled;
Step 8: after the ash water added with the medicine in the clarifying tank 31 is settled, solid-containing waste liquid at the bottom enters a sludge lifting pump 34 through a solid waste liquid outlet 30 of the clarifying tank 31, is pressurized by the sludge lifting pump 34 and then is sent into a filter pressing device 38 for solid-liquid separation, and the solid enters a solid sludge treatment device 41 through a solid outlet 39 of the filter pressing device 38 and is subjected to advanced treatment by the solid sludge treatment device 41; the liquid after the filter pressing device 38 is pressed and filtered enters the filtrate tank 42 through the liquid outlet 40 of the filter pressing device 38, the filtrate in the filtrate tank 42 is pressurized by the filtrate pump 43 and then sent to the second tee joint 46, and the filtrate is converged with the gray water from the first tee joint 44 and then enters the gray water tank 3 through the second inlet 4 of the gray water tank 3.
When the heat exchanger 9 in the step 3 is in a shutdown state, the second valve 8 and the third valve 11 are closed, and the first valve 7 and the fourth valve 12 are opened; the grey water entering the third tee joint 6 enters the No. 2 heat exchanger 10 through the first valve 7 for heat exchange, and the grey water after heat exchange enters the first reaction zone 14 of the pressurized reaction tank 13 through the fourth tee joint 47.
The invention will now be further illustrated with reference to examples for a more detailed explanation of the invention. Specific examples are as follows:
Example 1
The comprehensive treatment and recovery device for gasified grey water comprises a grey water clarifying tank 1 connected with a gasification system 37, wherein a supernatant outlet of the grey water clarifying tank 1 is connected with a grey water circulating system of the gasification system 37 through a first inlet 2 of the grey water tank 3, a fifth tee 22 and a 2# grey water pump 32; the third end of the fifth tee 22 is connected with an inlet on one side of the dosing reaction tank 13 through a No. 1 gray water pump 5 and a No. 1 heat exchanger 9, an outlet on the other side of the dosing reaction tank 13 is connected with a clarifying tank 31 through a No. 1 lifting pump 29, an overflow port 33 on the upper part of the clarifying tank 31 is connected with a clear liquid tank 35, the clear liquid tank 35 is connected with a sewage treatment system 45 through a No. 2 lifting pump 36 and a first tee 44, and the first tee 44 is connected with a second inlet 4 of the gray water tank 3 through a second tee 46; the solid waste liquid outlet 30 at the lower part of the clarifying tank 31 is connected with the filter pressing device 38 through the sludge lifting pump 34, the solid outlet 39 of the filter pressing device 38 is communicated with the solid sludge treatment device 41, and the liquid outlet 40 of the filter pressing device 38 is connected with the third end of the second tee 46 through the filtrate tank 42 and the filtrate pump 43; the chemical adding reaction tank 13 is internally provided with a first reaction zone 14, a second reaction zone 15 and a third reaction zone 16 which are communicated, a No. 1 overflow baffle 17 is arranged between the first reaction zone 14 and the second reaction zone 15, a No. 2 overflow baffle 18 is arranged between the second reaction zone 15 and the third reaction zone 16, stirrers are respectively arranged in the first reaction zone 14, the second reaction zone 15 and the third reaction zone 16, the top of the first reaction zone 14 is provided with a ferrous sulfate chemical adding unit, and the top of the second reaction zone 15 is provided with a sodium hydroxide chemical adding unit and a sodium carbonate chemical adding unit; the third reaction zone 16 is in communication with a # 1 lift pump 29. A third tee joint 6 and a second valve 8 are arranged between the No. 1 gray water pump 5 and the No. 1 heat exchanger 9, a third valve 11 and a fourth tee joint 47 are arranged between the No. 1 heat exchanger 9 and the dosing reaction tank 13, the third end of the third tee joint 6 is connected with the third end of the fourth tee joint 47 through a first valve 7, a No. 2 heat exchanger 10 and a fourth valve 12 in sequence, and the fourth tee joint 47 is communicated with the first reaction zone 14 in the dosing reaction tank 13. The 1# overflow baffle 17 is arranged at the inner upper part of the chemical adding reaction tank 13, and the first reaction zone 14 and the second reaction zone 15 are communicated with each other through the lower part of the 1# overflow baffle 17. The 2# overflow baffle 18 is arranged at the inner bottom of the chemical adding reaction tank 13, and the second reaction zone 15 and the third reaction zone 16 are communicated with each other through the upper part of the 2# overflow baffle 18. The stirrer comprises a stirring motor 19 arranged at the top of a corresponding reaction zone, the stirring motor 19 is connected with a stirring shaft 20, and stirring blades 21 sleeved on the outer circumference of the stirring shaft 20 are arranged in the corresponding reaction zone. The ferrous sulfate dosing unit comprises a ferrous sulfate storage tank 23, and the ferrous sulfate storage tank 23 is communicated with a dosing port at the top of the first reaction zone 14 through a No. 1 booster pump 24. The sodium hydroxide dosing unit comprises a sodium hydroxide storage tank 25, and the sodium hydroxide storage tank 25 is communicated with a sodium hydroxide dosing port at the top of the second reaction zone 15 through a No. 2 booster pump 26; the sodium carbonate dosing unit comprises a sodium carbonate storage tank 27, and the sodium carbonate storage tank 27 is communicated with a sodium carbonate dosing port at the top of the second reaction zone 15 through a No. 3 booster pump 28.
A treatment recovery method of a gasification grey water comprehensive treatment recovery device comprises the following steps:
step 1: the ash water of the gasification system is concentrated in an ash water clarifying tank 1, and after the ash water clarifying tank 1 naturally subsides, the supernatant enters an ash water tank 3 in an overflow mode;
step 2: the grey water in the grey water tank 3 enters the fifth tee joint 22, is divided into two paths after passing through the fifth tee joint 22, and one path enters the No. 2 grey water pump 32 and is sent to the grey water circulation system of the gasification system 37 for recycling after being pressurized by the No. 2 grey water pump 32; the other path is pressurized by a No. 1 grey water pump 5 and then is sent into a third tee joint 6;
step 3: the grey water entering the third tee joint 6 enters the No. 1 heat exchanger 9 through the second valve 8 for heat exchange, and the grey water after heat exchange enters the first reaction zone 14 of the pressurized reaction tank 13 through the fourth tee joint 47;
step 4: after the grey water enters the first reaction zone 14, the ferrous sulfate solution enters a 1# pressurizing pump 24 through a ferrous sulfate storage tank 23 to be pressurized, then enters the first reaction zone 14 through a medicine adding port at the top of the first reaction zone 14, and simultaneously starts a stirrer 20 in the first reaction zone 14; si in grey water is removed by reacting ferrous sulfate with the grey water 2+ Ions; the reaction in the first reaction zone 14 can be accelerated by activating the agitator 20;
step 5: the grey water enters the second reaction zone 15 from the bottom of the first reaction zone 14 after reacting in the first reaction zone 14, sodium hydroxide solution enters the second reaction zone 15 from a sodium hydroxide dosing port at the top of the second reaction zone 15 after being pressurized in a 2# pressurizing pump 26 through a sodium hydroxide storage tank 25, sodium carbonate solution enters the second reaction zone 15 from a sodium carbonate dosing port at the top of the second reaction zone 15 after being pressurized in a 3# pressurizing pump 28 through a sodium carbonate storage tank 27, and simultaneously a stirrer in the second reaction zone 15 is started; removing Ca in grey water by reacting sodium hydroxide and sodium carbonate with the grey water 2+ And Mg (magnesium) 2+ Ions; the reaction in the second reaction zone 15 can be accelerated by activating the agitator 20;
step 6: the grey water enters a third reaction zone 16 after reacting in a second reaction zone 15, and simultaneously, a stirrer in the third reaction zone 16 is started, wherein the third reaction zone 16 is an overflow zone, and overflowed grey water enters a clarifying tank 31 through a No. 1 lifting pump 29 for natural sedimentation; the stirrer prevents the insoluble solid matters generated by the reaction from settling in advance;
step 7: after the ash water added with the medicine in the clarifying tank 31 is settled, the supernatant enters the supernatant tank 35 through the overflow port 33, the supernatant in the supernatant tank 35 is pressurized by the No. 2 lifting pump 36 and then is sent into the first tee joint 44, the first tee joint 44 is divided into two paths, one path is sent to the sewage treatment system 45 for deeper treatment, the other path enters the ash water tank 3 through the second tee joint 46 and the second inlet 4 of the ash water tank 3, and the supernatant is mixed with the ash water in the ash water tank 3 to reduce the hardness of the ash water and is recycled;
Step 8: after the ash water added with the medicine in the clarifying tank 31 is settled, solid-containing waste liquid at the bottom enters a sludge lifting pump 34 through a solid waste liquid outlet 30 of the clarifying tank 31, is pressurized by the sludge lifting pump 34 and then is sent into a filter pressing device 38 for solid-liquid separation, and the solid enters a solid sludge treatment device 41 through a solid outlet 39 of the filter pressing device 38 and is subjected to advanced treatment by the solid sludge treatment device 41; the liquid after the filter pressing device 38 is pressed and filtered enters the filtrate tank 42 through the liquid outlet 40 of the filter pressing device 38, the filtrate in the filtrate tank 42 is pressurized by the filtrate pump 43 and then sent to the second tee joint 46, and the filtrate is converged with the gray water from the first tee joint 44 and then enters the gray water tank 3 through the second inlet 4 of the gray water tank 3.
Example 2
The comprehensive treatment and recovery device for gasified grey water comprises a grey water clarifying tank 1 connected with a gasification system 37, wherein a supernatant outlet of the grey water clarifying tank 1 is connected with a grey water circulating system of the gasification system 37 through a first inlet 2 of the grey water tank 3, a fifth tee 22 and a 2# grey water pump 32; the third end of the fifth tee 22 is connected with an inlet on one side of the dosing reaction tank 13 through a No. 1 gray water pump 5 and a No. 1 heat exchanger 9, an outlet on the other side of the dosing reaction tank 13 is connected with a clarifying tank 31 through a No. 1 lifting pump 29, an overflow port 33 on the upper part of the clarifying tank 31 is connected with a clear liquid tank 35, the clear liquid tank 35 is connected with a sewage treatment system 45 through a No. 2 lifting pump 36 and a first tee 44, and the first tee 44 is connected with a second inlet 4 of the gray water tank 3 through a second tee 46; the solid waste liquid outlet 30 at the lower part of the clarifying tank 31 is connected with the filter pressing device 38 through the sludge lifting pump 34, the solid outlet 39 of the filter pressing device 38 is communicated with the solid sludge treatment device 41, and the liquid outlet 40 of the filter pressing device 38 is connected with the third end of the second tee 46 through the filtrate tank 42 and the filtrate pump 43; the chemical adding reaction tank 13 is internally provided with a first reaction zone 14, a second reaction zone 15 and a third reaction zone 16 which are communicated, a No. 1 overflow baffle 17 is arranged between the first reaction zone 14 and the second reaction zone 15, a No. 2 overflow baffle 18 is arranged between the second reaction zone 15 and the third reaction zone 16, stirrers are respectively arranged in the first reaction zone 14, the second reaction zone 15 and the third reaction zone 16, the top of the first reaction zone 14 is provided with a ferrous sulfate chemical adding unit, and the top of the second reaction zone 15 is provided with a sodium hydroxide chemical adding unit and a sodium carbonate chemical adding unit; the third reaction zone 16 is in communication with a # 1 lift pump 29. A third tee joint 6 and a second valve 8 are arranged between the No. 1 gray water pump 5 and the No. 1 heat exchanger 9, a third valve 11 and a fourth tee joint 47 are arranged between the No. 1 heat exchanger 9 and the dosing reaction tank 13, the third end of the third tee joint 6 is connected with the third end of the fourth tee joint 47 through a first valve 7, a No. 2 heat exchanger 10 and a fourth valve 12 in sequence, and the fourth tee joint 47 is communicated with the first reaction zone 14 in the dosing reaction tank 13. The 1# overflow baffle 17 is arranged at the inner upper part of the chemical adding reaction tank 13, and the first reaction zone 14 and the second reaction zone 15 are communicated with each other through the lower part of the 1# overflow baffle 17. The 2# overflow baffle 18 is arranged at the inner bottom of the chemical adding reaction tank 13, and the second reaction zone 15 and the third reaction zone 16 are communicated with each other through the upper part of the 2# overflow baffle 18. The stirrer comprises a stirring motor 19 arranged at the top of a corresponding reaction zone, the stirring motor 19 is connected with a stirring shaft 20, and stirring blades 21 sleeved on the outer circumference of the stirring shaft 20 are arranged in the corresponding reaction zone. The ferrous sulfate dosing unit comprises a ferrous sulfate storage tank 23, and the ferrous sulfate storage tank 23 is communicated with a dosing port at the top of the first reaction zone 14 through a No. 1 booster pump 24. The sodium hydroxide dosing unit comprises a sodium hydroxide storage tank 25, and the sodium hydroxide storage tank 25 is communicated with a sodium hydroxide dosing port at the top of the second reaction zone 15 through a No. 2 booster pump 26; the sodium carbonate dosing unit comprises a sodium carbonate storage tank 27, and the sodium carbonate storage tank 27 is communicated with a sodium carbonate dosing port at the top of the second reaction zone 15 through a No. 3 booster pump 28.
A treatment recovery method of a gasification grey water comprehensive treatment recovery device comprises the following steps:
step 1: the ash water of the gasification system is concentrated in an ash water clarifying tank 1, and after the ash water clarifying tank 1 naturally subsides, the supernatant enters an ash water tank 3 in an overflow mode;
step 2: the grey water in the grey water tank 3 enters the fifth tee joint 22, is divided into two paths after passing through the fifth tee joint 22, and one path enters the No. 2 grey water pump 32 and is sent to the grey water circulation system of the gasification system 37 for recycling after being pressurized by the No. 2 grey water pump 32; the other path is pressurized by a No. 1 grey water pump 5 and then is sent into a third tee joint 6;
step 3: the grey water entering the third tee joint 6 enters the No. 1 heat exchanger 9 through the second valve 8 for heat exchange, and the grey water after heat exchange enters the first reaction zone 14 of the pressurized reaction tank 13 through the fourth tee joint 47;
step 4: after the grey water enters the first reaction zone 14, the ferrous sulfate solution enters a 1# pressurizing pump 24 through a ferrous sulfate storage tank 23 to be pressurized, then enters the first reaction zone 14 through a medicine adding port at the top of the first reaction zone 14, and simultaneously starts a stirrer 20 in the first reaction zone 14; si in grey water is removed by reacting ferrous sulfate with the grey water 2+ Ions; the reaction in the first reaction zone 14 can be accelerated by activating the agitator 20;
step 5: the grey water enters the second reaction zone 15 from the bottom of the first reaction zone 14 after reacting in the first reaction zone 14, sodium hydroxide solution enters the second reaction zone 15 from a sodium hydroxide dosing port at the top of the second reaction zone 15 after being pressurized in a 2# pressurizing pump 26 through a sodium hydroxide storage tank 25, sodium carbonate solution enters the second reaction zone 15 from a sodium carbonate dosing port at the top of the second reaction zone 15 after being pressurized in a 3# pressurizing pump 28 through a sodium carbonate storage tank 27, and simultaneously a stirrer in the second reaction zone 15 is started; removing Ca in grey water by reacting sodium hydroxide and sodium carbonate with the grey water 2+ And Mg (magnesium) 2+ Ions; the reaction in the second reaction zone 15 can be accelerated by activating the agitator 20;
step 6: the grey water enters a third reaction zone 16 after reacting in a second reaction zone 15, and simultaneously, a stirrer in the third reaction zone 16 is started, wherein the third reaction zone 16 is an overflow zone, and overflowed grey water enters a clarifying tank 31 through a No. 1 lifting pump 29 for natural sedimentation; the stirrer prevents the insoluble solid matters generated by the reaction from settling in advance;
step 7: after the ash water added with the medicine in the clarifying tank 31 is settled, the supernatant enters the supernatant tank 35 through the overflow port 33, the supernatant in the supernatant tank 35 is pressurized by the No. 2 lifting pump 36 and then is sent into the first tee joint 44, the first tee joint 44 is divided into two paths, one path is sent to the sewage treatment system 45 for deeper treatment, the other path enters the ash water tank 3 through the second tee joint 46 and the second inlet 4 of the ash water tank 3, and the supernatant is mixed with the ash water in the ash water tank 3 to reduce the hardness of the ash water and is recycled;
Step 8: after the ash water added with the medicine in the clarifying tank 31 is settled, solid-containing waste liquid at the bottom enters a sludge lifting pump 34 through a solid waste liquid outlet 30 of the clarifying tank 31, is pressurized by the sludge lifting pump 34 and then is sent into a filter pressing device 38 for solid-liquid separation, and the solid enters a solid sludge treatment device 41 through a solid outlet 39 of the filter pressing device 38 and is subjected to advanced treatment by the solid sludge treatment device 41; the liquid after the filter pressing device 38 is pressed and filtered enters the filtrate tank 42 through the liquid outlet 40 of the filter pressing device 38, the filtrate in the filtrate tank 42 is pressurized by the filtrate pump 43 and then sent to the second tee joint 46, and the filtrate is converged with the gray water from the first tee joint 44 and then enters the gray water tank 3 through the second inlet 4 of the gray water tank 3.
When the heat exchanger 9 in the step 3 needs to be adjusted to a shutdown state, the second valve 8 and the third valve 11 are closed, and the first valve 7 and the fourth valve 12 are opened; the grey water entering the third tee joint 6 enters the No. 2 heat exchanger 10 through the first valve 7 for heat exchange, and the grey water after heat exchange enters the first reaction zone 14 of the pressurized reaction tank 13 through the fourth tee joint 47.
Example 3
The comprehensive treatment and recovery device for gasified grey water comprises a grey water clarifying tank 1 connected with a gasification system 37, wherein a supernatant outlet of the grey water clarifying tank 1 is connected with a grey water circulating system of the gasification system 37 through a first inlet 2 of the grey water tank 3, a fifth tee 22 and a 2# grey water pump 32; the third end of the fifth tee 22 is connected with an inlet on one side of the dosing reaction tank 13 through a No. 1 gray water pump 5 and a No. 1 heat exchanger 9, an outlet on the other side of the dosing reaction tank 13 is connected with a clarifying tank 31 through a No. 1 lifting pump 29, an overflow port 33 on the upper part of the clarifying tank 31 is connected with a clear liquid tank 35, the clear liquid tank 35 is connected with a sewage treatment system 45 through a No. 2 lifting pump 36 and a first tee 44, and the first tee 44 is connected with a second inlet 4 of the gray water tank 3 through a second tee 46; the solid waste liquid outlet 30 at the lower part of the clarifying tank 31 is connected with the filter pressing device 38 through the sludge lifting pump 34, the solid outlet 39 of the filter pressing device 38 is communicated with the solid sludge treatment device 41, and the liquid outlet 40 of the filter pressing device 38 is connected with the third end of the second tee 46 through the filtrate tank 42 and the filtrate pump 43; the chemical adding reaction tank 13 is internally provided with a first reaction zone 14, a second reaction zone 15 and a third reaction zone 16 which are communicated, a No. 1 overflow baffle 17 is arranged between the first reaction zone 14 and the second reaction zone 15, a No. 2 overflow baffle 18 is arranged between the second reaction zone 15 and the third reaction zone 16, stirrers are respectively arranged in the first reaction zone 14, the second reaction zone 15 and the third reaction zone 16, the top of the first reaction zone 14 is provided with a ferrous sulfate chemical adding unit, and the top of the second reaction zone 15 is provided with a sodium hydroxide chemical adding unit and a sodium carbonate chemical adding unit; the third reaction zone 16 is in communication with a # 1 lift pump 29. A third tee joint 6 and a second valve 8 are arranged between the No. 1 gray water pump 5 and the No. 1 heat exchanger 9, a third valve 11 and a fourth tee joint 47 are arranged between the No. 1 heat exchanger 9 and the dosing reaction tank 13, the third end of the third tee joint 6 is connected with the third end of the fourth tee joint 47 through a first valve 7, a No. 2 heat exchanger 10 and a fourth valve 12 in sequence, and the fourth tee joint 47 is communicated with the first reaction zone 14 in the dosing reaction tank 13. The 1# overflow baffle 17 is arranged at the inner upper part of the chemical adding reaction tank 13, and the first reaction zone 14 and the second reaction zone 15 are communicated with each other through the lower part of the 1# overflow baffle 17. The 2# overflow baffle 18 is arranged at the inner bottom of the chemical adding reaction tank 13, and the second reaction zone 15 and the third reaction zone 16 are communicated with each other through the upper part of the 2# overflow baffle 18. The stirrer comprises a stirring motor 19 arranged at the top of a corresponding reaction zone, the stirring motor 19 is connected with a stirring shaft 20, and stirring blades 21 sleeved on the outer circumference of the stirring shaft 20 are arranged in the corresponding reaction zone. The ferrous sulfate dosing unit comprises a ferrous sulfate storage tank 23, and the ferrous sulfate storage tank 23 is communicated with a dosing port at the top of the first reaction zone 14 through a No. 1 booster pump 24. The sodium hydroxide dosing unit comprises a sodium hydroxide storage tank 25, and the sodium hydroxide storage tank 25 is communicated with a sodium hydroxide dosing port at the top of the second reaction zone 15 through a No. 2 booster pump 26; the sodium carbonate dosing unit comprises a sodium carbonate storage tank 27, and the sodium carbonate storage tank 27 is communicated with a sodium carbonate dosing port at the top of the second reaction zone 15 through a No. 3 booster pump 28.
A treatment recovery method of a gasification grey water comprehensive treatment recovery device comprises the following steps:
step 1: the ash water of the gasification system is concentrated in an ash water clarifying tank 1, and after the ash water clarifying tank 1 naturally subsides, the supernatant enters an ash water tank 3 in an overflow mode;
step 2: the grey water in the grey water tank 3 enters the fifth tee joint 22, is divided into two paths after passing through the fifth tee joint 22, and one path enters the No. 2 grey water pump 32 and is sent to the grey water circulation system of the gasification system 37 for recycling after being pressurized by the No. 2 grey water pump 32; the other path is pressurized by a No. 1 grey water pump 5 and then is sent into a third tee joint 6;
step 3: the grey water entering the third tee joint 6 enters the No. 2 heat exchanger 10 through the first valve 7 for heat exchange, and the grey water after heat exchange enters the first reaction zone 14 of the pressurized reaction tank 13 through the fourth tee joint 47;
step 4: after the grey water enters the first reaction zone 14, the ferrous sulfate solution enters a 1# pressurizing pump 24 through a ferrous sulfate storage tank 23 to be pressurized, then enters the first reaction zone 14 through a medicine adding port at the top of the first reaction zone 14, and simultaneously starts a stirrer 20 in the first reaction zone 14; si in grey water is removed by reacting ferrous sulfate with the grey water 2+ Ions; the reaction in the first reaction zone 14 can be accelerated by activating the agitator 20;
step 5: the grey water enters the second reaction zone 15 from the bottom of the first reaction zone 14 after reacting in the first reaction zone 14, and sodium hydroxide solution enters a No. 2 booster pump 26 through a sodium hydroxide storage tank 25 for addingThe sodium hydroxide chemical adding port at the top of the second reaction zone 15 enters the second reaction zone 15 after being pressed, the sodium carbonate solution enters the 3# pressurizing pump 28 through the sodium carbonate storage tank 27, is pressurized and then enters the second reaction zone 15 through the sodium carbonate chemical adding port at the top of the second reaction zone 15, and simultaneously starts a stirrer in the second reaction zone 15; removing Ca in grey water by reacting sodium hydroxide and sodium carbonate with the grey water 2+ And Mg (magnesium) 2+ Ions; the reaction in the second reaction zone 15 can be accelerated by activating the agitator 20;
step 6: the grey water enters a third reaction zone 16 after reacting in a second reaction zone 15, and simultaneously, a stirrer in the third reaction zone 16 is started, wherein the third reaction zone 16 is an overflow zone, and overflowed grey water enters a clarifying tank 31 through a No. 1 lifting pump 29 for natural sedimentation; the stirrer prevents the insoluble solid matters generated by the reaction from settling in advance;
step 7: after the ash water added with the medicine in the clarifying tank 31 is settled, the supernatant enters the supernatant tank 35 through the overflow port 33, the supernatant in the supernatant tank 35 is pressurized by the No. 2 lifting pump 36 and then is sent into the first tee joint 44, the first tee joint 44 is divided into two paths, one path is sent to the sewage treatment system 45 for deeper treatment, the other path enters the ash water tank 3 through the second tee joint 46 and the second inlet 4 of the ash water tank 3, and the supernatant is mixed with the ash water in the ash water tank 3 to reduce the hardness of the ash water and is recycled;
Step 8: after the ash water added with the medicine in the clarifying tank 31 is settled, solid-containing waste liquid at the bottom enters a sludge lifting pump 34 through a solid waste liquid outlet 30 of the clarifying tank 31, is pressurized by the sludge lifting pump 34 and then is sent into a filter pressing device 38 for solid-liquid separation, and the solid enters a solid sludge treatment device 41 through a solid outlet 39 of the filter pressing device 38 and is subjected to advanced treatment by the solid sludge treatment device 41; the liquid after the filter pressing device 38 is pressed and filtered enters the filtrate tank 42 through the liquid outlet 40 of the filter pressing device 38, the filtrate in the filtrate tank 42 is pressurized by the filtrate pump 43 and then sent to the second tee joint 46, and the filtrate is converged with the gray water from the first tee joint 44 and then enters the gray water tank 3 through the second inlet 4 of the gray water tank 3.
When the heat exchanger 10 in the step 3 needs to be adjusted to a shutdown state, the first valve 7 and the fourth valve 12 are closed, and the second valve 8 and the third valve 11 are opened; the grey water entering the third tee joint 6 enters the No. 1 heat exchanger 9 through the second valve 8 for heat exchange, and the grey water after heat exchange enters the first reaction zone 14 of the pressurized reaction tank 13 through the fourth tee joint 47.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, integrally connected, or detachably connected; or the communication between the two components is also possible; may be directly connected or indirectly connected through an intermediate medium, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to the specific circumstances. The above examples are only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, but all equivalent embodiments, modifications and adaptations without departing from the technical spirit of the present invention are intended to be included in the scope of the present invention.
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| GB2593188B (en) * | 2020-03-18 | 2024-06-05 | Velocys Tech Limited | Process for treating wastewater from a gasification and fischer-tropsch process |
| CN112897665A (en) * | 2021-04-07 | 2021-06-04 | 宁夏神耀科技有限责任公司 | Method and device for recycling coal gasification wastewater |
| CN113371914A (en) * | 2021-07-12 | 2021-09-10 | 台州市路桥水立方净水器有限公司 | Kitchen water ash water treatment recycling system |
| CN115676981A (en) * | 2022-11-14 | 2023-02-03 | 宁夏神耀科技有限责任公司 | Method, system and use for purifying coal gasification grey water |
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