CN213537527U - Treatment recycling system suitable for circulating cooling water of waste incineration power plant discharges sewage - Google Patents
Treatment recycling system suitable for circulating cooling water of waste incineration power plant discharges sewage Download PDFInfo
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- CN213537527U CN213537527U CN202022056945.9U CN202022056945U CN213537527U CN 213537527 U CN213537527 U CN 213537527U CN 202022056945 U CN202022056945 U CN 202022056945U CN 213537527 U CN213537527 U CN 213537527U
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Abstract
The utility model discloses a treatment recycling system suitable for circulating cooling water discharge sewage of a waste incineration power plant, which comprises an adjusting tank, a mixed reaction tank, a high-efficiency flocculation reaction tank, an inclined plate sedimentation tank, a neutralization tank, a filtering raw water tank, a multi-medium filter, an ultrafiltration device, an ultrafiltration product water tank, a reverse osmosis device and a recycling water tank which are sequentially connected with the circulating cooling water discharge sewage, wherein the water discharged from the recycling water tank is recycled; the mixing reaction tank is connected with a first dosing device, the high-efficiency flocculation reaction tank is connected with a second dosing device, and the neutralization tank is connected with a third dosing device; a bypass is additionally arranged on the water outlet pipeline of the multi-medium filter and is connected with the reuse water tank; the utility model discloses quality of water after the processing reaches and accords with open-type recirculating cooling water system moisturizing standard, and produces water and be used for the cooling tower moisturizing of rubbish power plant, has both avoided the emission of pollutant, has practiced thrift the water resource again.
Description
Technical Field
The utility model belongs to the technical field of industry recirculated cooling water treatment, can extensively be applicable to as the recirculated cooling water moisturizing water source of trades such as refuse burning power plant, concretely relates to processing recycling system suitable for refuse burning power plant recirculated cooling water log raft sewage.
Background
The circulating cooling water is used for exchanging medium heat through a heat exchanger or a direct contact heat exchange mode, and is recycled after being cooled by a cooling tower so as to save water resources. The circulating cooling water sewage discharge refers to water generated by increasing salt content in water due to continuous concentration of the circulating cooling water in the circulating utilization of the circulating cooling water.
In a waste incineration power plant, cooling water for a cooling system accounts for more than 90% of the whole power generation project, and most of the cooling water needs to be recycled in the aspect of industrial cooling water treatment. Because the raw water has different salt contents, the circulating cooling water is concentrated to a certain multiple, certain concentrated water must be discharged, and new water is supplemented to control the salt content, the pH value, the organic matter concentration and the suspended matter content in the cooling water within a reasonable allowable range. The method has important significance for specific treatment and recycling of the part of concentrated water discharge. The water recycling device can not only improve the repeated utilization rate of water and save water resources, but also greatly improve the overall condition of circulating cooling water.
Chinese patent No. CN205803137U discloses a cooling water treatment system for a waste incineration power plant, which mainly comprises a multi-media filter, a softening device, a water purification tank, a disc filter, an ultrafiltration device, an ultrafiltration water tank, a reverse osmosis device and a reverse osmosis water tank. The patent mainly solves the problems of corrosion, scaling and slime caused by the use of circulating water, and the defects of a chemical dosing method and a conventional membrane treatment method, but the cooling water treatment system still has the following defects in practical use: firstly, a softening device has certain requirements on the hardness of inlet water and is not suitable for high-hardness wastewater; secondly, a resin regeneration system must be installed on the softening device, resin particles are small and leakage is easy to occur, a large amount of regeneration waste liquid needs to be generated during resin regeneration, the waste liquid is not easy to dispose, and real zero emission is not realized; thirdly, the system structure is complex and the operation cost is high.
Based on the above problems in the background, there is an urgent need for an innovative technology to overcome the technical problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The key point of the utility model lies in that the water quality of the sewage is discharged to the recirculated cooling water, the existing process is reasonably integrated together, and the treated water quality reaches the water supplement standard of the open recirculated cooling water system for the cooling tower (GB/T19923-2005) through the processes of 'softening coagulation reaction precipitation + neutralization + multi-media filter filtration + ultrafiltration + reverse osmosis'. The produced water is used for replenishing water to the cooling tower of the refuse power plant, thereby not only avoiding the emission of pollutants, but also saving water resources.
The technical means adopted by the utility model are as follows.
A treatment recycling system suitable for circulating cooling water discharge sewage of a waste incineration power plant is characterized by comprising a regulating tank, a mixed reaction tank, a high-efficiency flocculation reaction tank, an inclined plate sedimentation tank, a neutralization tank, a filtering raw water tank, a multi-media filter, an ultrafiltration device, an ultrafiltration product water tank, a reverse osmosis device and a recycling water tank which are sequentially connected with the circulating cooling water discharge sewage, wherein the water discharged from the recycling water tank is recycled; the mixing reaction tank is connected with a first dosing device, the high-efficiency flocculation reaction tank is connected with a second dosing device, and the neutralization tank is connected with a third dosing device; and a bypass is additionally arranged on the water outlet pipeline of the multi-medium filter and is connected with the reuse water tank.
Simultaneously, the utility model discloses still have following characteristics.
The inclined plate sedimentation tank is additionally connected with a sludge concentration tank, and the sludge concentration tank is also connected with a plate-and-frame filter press.
The reverse osmosis device is additionally provided with a pipeline to be connected with a concentrated water tank, and the concentrated water in the concentrated water tank is recycled.
And the backwashing water in the multi-medium filter and the ultrafiltration device flows back to the regulating pond through an additional bypass pipeline.
The first dosing device is a lime milk dosing device and a sodium carbonate dosing device; the second dosing device is a flocculating agent dosing device; the third medicine adding device is a neutralization reagent adding device.
And a submersible stirrer is arranged in the regulating tank.
According to the above technical means, the utility model discloses produced technological effect is as follows.
Compared with the mixed bed softening, the softening coagulating sedimentation of the utility model has the advantages of no regeneration waste liquid and water production, no requirement on the hardness of the inlet water quality, and capability of receiving waste water with higher hardness; meanwhile, the treatment system has stable hardness removal rate, no other waste liquid is generated except sludge, and water resources are saved; but also has the advantages of low running cost, high automation degree and the like. The water quality of the outlet water can reach the water supplement standard of an open type circulating cooling water system in the urban sewage recycling-industrial water quality (GB/T19923-2005). The method has the advantages of good and stable effluent quality, high recovery rate, no environmental pollution, water resource saving, high automation degree and the like.
Drawings
Fig. 1 is a schematic view of the flow structure of the present invention.
Detailed Description
As shown in fig. 1, is a schematic view of the flow structure of the present invention. The utility model discloses a treatment and recycling system suitable for circulating cooling water discharge sewage of a waste incineration power plant, which comprises an adjusting tank 1, a mixed reaction tank 2, a high-efficiency flocculation reaction tank 3, an inclined plate sedimentation tank 4, a neutralization tank 5, a filtering raw water tank 6, a multi-medium filter 7, an ultrafiltration device 8, an ultrafiltration production water tank 9, a reverse osmosis device 10 and a recycling water tank 11 which are sequentially connected with the circulating cooling water discharge sewage, wherein the water discharged from the recycling water tank 11 is recycled; in addition, the mixing reaction tank 2 is connected with a first dosing device, the high-efficiency flocculation reaction tank 3 is connected with a second dosing device, and the neutralization tank 3 is connected with a third dosing device; a bypass is additionally arranged on the water outlet pipeline of the multi-medium filter 7 and is connected with the reuse water tank 11.
Further, the inclined plate sedimentation tank 4 is additionally connected with a sludge concentration tank 41, and the sludge concentration tank 41 is further connected with a plate and frame filter press 42.
Furthermore, the reverse osmosis device 10 is additionally provided with a pipeline connected with the concentrated water tank 101.
Furthermore, the backwash water in the multi-media filter 7 and the ultrafiltration device 8 flows back to the regulating reservoir 1 through an additional bypass pipeline.
The first dosing device is a lime milk dosing device and a sodium carbonate dosing device; the second dosing device is a flocculating agent dosing device; the third medicine adding device is a neutralization reagent adding device. Further, the lime milk dosing device is mainly a lime milk reagent, and the sodium carbonate dosing device mainly comprises a sodium carbonate reagent; the flocculant is polyacrylamide or polyaluminium chloride or a combination of polyacrylamide and polyaluminium chloride; the neutralizing agent is hydrochloric acid.
Furthermore, a submersible stirrer is arranged in the adjusting tank 1.
The utility model discloses when in actual use, the regulation of carrying out quality of water and water yield in equalizing basin 1 is discharged into by the treatment tube who establishes specially to recirculated cooling water drainage (hereinafter referred to as blow off water), still be provided with the dive mixer in the equalizing basin 1 to prevent sludge sedimentation. Sewage after regulation by the equalizing basin 1 is sent into in the mixed reaction pond 2 by the waste water pump, simultaneously through first charge device to throw in the mixed reaction pond 2 and add lime milk and sodium carbonate (soda) and be used for reducing sewage hardness, sewage after the reaction continues to handle in flowing into high-efficient flocculation reaction pond 3 by oneself, at this moment through second charge device to throw in the high-efficient flocculation reaction pond 3 Polyacrylamide (PAM) charge device and polyaluminium chloride (PAC) or other flocculating agents, usually high-efficient flocculation reaction pond 3 has functions such as flocculation, reaction, deposit, blowdown.
The sewage enters the inclined plate sedimentation tank 4 for sedimentation after the stirring reaction in the flocculation zone (namely in the high-efficiency flocculation reaction tank), the sludge after full sedimentation is discharged into the sludge concentration tank 41, and the supernatant is sent to the multi-media filter 7 for pretreatment through the raw water filtering tank 6, so that the impurities such as suspended matters, sand, particles, organic silica gel, organic matters and the like in the raw water are effectively removed. Meanwhile, the sludge discharged from the inclined plate sedimentation tank 4 enters a sludge concentration tank 41, the sludge in the sludge concentration tank 41 is treated by a plate-and-frame filter press 42, and the dried sludge is transported to waste incineration treatment. The treatment of sludge and filter-pressing clear liquid in the sludge concentration tank is the prior art and is not described herein.
The treated raw water is pumped into an ultrafiltration device 8 to further remove impurities such as suspended matters, colloid, chromaticity, turbidity, organic matters, bacteria, escherichia coli and the like. The treated raw water is collected in the ultrafiltration water production tank 9 in a centralized manner and is sent to a reverse osmosis device 10 (the utility model discloses preferentially be RO reverse osmosis system) through a pressurizing pump to remove soluble salt substances, bacteria and the like in the water, the produced water reaches the effluent water quality standard and is collected in a centralized manner to enter a reuse pool 11 for reuse, and the treated raw water can be used for circulating water cooling and water replenishing; the reverse osmosis concentrated solution of the system is discharged to the concentrated water tank 101 through a bypass pipeline, and the concentrated solution can be reused as water for the flue gas semi-dry process, so that zero emission of sewage is realized.
Usually, still be provided with a neutralization pond 5 between swash plate sedimentation tank 4 and the former water tank of filtration, neutralization pond 5 is connected with the third charge device in addition, contain neutralization reagent in the third charge device the utility model discloses in neutralization reagent is hydrochloric acid. Namely, hydrochloric acid is added into the neutralization tank 5 through a pH on-line monitoring detector or other detection devices, and sewage is collected and subsequently treated in a filtering raw water tank after the pH value of the sewage is adjusted to meet the process conditions.
Furthermore, the multi-media filter 7 and the ultrafiltration device 8 are respectively provided with a pipeline for collecting and returning backwash water in the multi-media filter 7 and the ultrafiltration device 8 to the system regulating tank 1 for retreatment. A collecting tank (not shown in the figure) can be additionally arranged, namely backwash water is firstly discharged into the collecting tank to be collected, and then the backwash water in the collecting tank is sent into the system regulating tank according to the situation.
The kind and the quantity are put in to the medicament in first charge device, second charge device and the third charge device, all the technical personnel in the field can be according to the waste water condition free choice.
In order to save energy and reduce emission and save water resources, the utility model integrates the circulating water sewage treatment and reuse scheme of a set of system aiming at the characteristics and the treatment current situation of circulating cooling water sewage for replenishing circulating cooling water of a garbage power plant, and leads the treated water quality to reach the water replenishing standard of an open circulating cooling water system of urban sewage recycling-industrial water quality (GB/T19923-2005) through the physicochemical pretreatment and membrane technology treatment process. The produced water is used for water of a waste incineration power plant. Not only avoids the discharge of pollutants, but also saves water resources. Meanwhile, the process flow equipment has the advantages of small occupied area, good and stable effluent quality, high recovery rate, almost no pollution to the environment, water resource saving, high automation degree and the like, and is worthy of wide popularization.
Claims (6)
1. The utility model provides a handle recycling system suitable for waste incineration power plant recirculated cooling water sewages, its characterized in that contains:
the device comprises a regulating tank, a mixing reaction tank, a high-efficiency flocculation reaction tank, an inclined plate sedimentation tank, a neutralization tank, a raw filtering water tank, a multi-media filter, an ultrafiltration device, an ultrafiltration water production tank, a reverse osmosis device and a reuse water tank which are sequentially connected with the sewage discharged by the circulating cooling water, wherein the water discharged from the reuse water tank is reused;
the mixing reaction tank is connected with a first dosing device, the high-efficiency flocculation reaction tank is connected with a second dosing device, and the neutralization tank is connected with a third dosing device;
and a bypass is additionally arranged on the water outlet pipeline of the multi-medium filter and is connected with the reuse water tank.
2. The system of claim 1, wherein the inclined plate sedimentation tank is further connected with a sludge concentration tank, and the sludge concentration tank is further connected with a plate-and-frame filter press.
3. The system of claim 1, wherein the reverse osmosis device is further connected with a concentrated water tank through a pipeline.
4. The system for treating and recycling the circulating cooling water discharge sewage of the refuse incineration power plant as claimed in claim 1, wherein the backwashing water in the multi-media filter and the ultrafiltration device flows back to the regulating reservoir through an additional bypass pipeline.
5. The system for treating and recycling the circulating cooling water discharge sewage of the refuse incineration power plant according to any one of claims 1 to 4, wherein the first chemical adding device is a lime milk chemical adding device and a sodium carbonate chemical adding device; the second dosing device is a flocculating agent dosing device; the third medicine adding device is a neutralization reagent adding device.
6. The system for treating and recycling the circulating cooling water discharge sewage of the refuse incineration power plant as claimed in claim 5, wherein a submersible mixer is arranged in the regulating reservoir.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022056945.9U CN213537527U (en) | 2020-09-18 | 2020-09-18 | Treatment recycling system suitable for circulating cooling water of waste incineration power plant discharges sewage |
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| CN202022056945.9U CN213537527U (en) | 2020-09-18 | 2020-09-18 | Treatment recycling system suitable for circulating cooling water of waste incineration power plant discharges sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409142A (en) * | 2022-02-16 | 2022-04-29 | 莱特莱德(上海)技术有限公司 | High-hardness wastewater softening treatment device and method |
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- 2020-09-18 CN CN202022056945.9U patent/CN213537527U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409142A (en) * | 2022-02-16 | 2022-04-29 | 莱特莱德(上海)技术有限公司 | High-hardness wastewater softening treatment device and method |
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