CN214528432U

CN214528432U - Waste water desalination system of waste incineration power plant

Info

Publication number: CN214528432U
Application number: CN202023294170.5U
Authority: CN
Inventors: 宗良明; 郭博文
Original assignee: Jiangsu Water Environmental Protection Co ltd
Current assignee: Jiangsu Water Environmental Protection Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-29
Anticipated expiration: 2030-12-31

Abstract

A waste water desalting system of a waste incineration power plant is mainly applied to the treatment of waste water of the waste incineration power plant and comprises an adjusting tank, a rotary disc filtering tank, an ultrafiltration membrane component, a primary reverse osmosis device, a secondary reverse osmosis device, a tertiary reverse osmosis device and an EDI component which are sequentially connected in series, wherein a pipeline at the bottom of the adjusting tank is connected into an upper water distribution channel of the rotary disc filtering tank, a group of water collecting barrels are mounted on two opposite tank walls in the rotary table filtering tank, a plurality of sets of fiber rotary tables are mounted on the barrel wall of each water collecting barrel, the water outlet end of each water collecting barrel penetrates through the tank wall to be connected into a water collecting area at the rear part of the rotary table filtering tank, a water pump is arranged in each water collecting area, a high-pressure water pump is mounted on a pipeline between the ultrafiltration membrane assembly and the primary reverse osmosis device, the water outlet pipeline of the tertiary reverse osmosis device is directly connected to the bottom end of the ionic resin layer in the EDI assembly, and the water outlet pipeline is directly connected with the top end of the ionic resin layer. The system has the characteristics of high desalting efficiency, stable operation and the like.

Description

Waste water desalination system of waste incineration power plant

Technical Field

The utility model relates to a desalination system mainly is applied to the processing of waste water of msw incineration power plant.

Background

Waste incineration power generation treatment has become the main measure for domestic waste treatment in China in recent decades, and waste incineration power plants can produce a large amount of waste water in the daily operation process, the waste water mainly comprises leachate, recycled water drainage, boiler sewage, domestic sewage and the like, wherein the leachate waste water accounts for more than 50% of the total amount, the salt concentration is very high, the biodegradability is poor, and the traditional biological treatment process cannot effectively treat the waste water. However, as the sewage discharge standard in China becomes stricter, the development of an efficient process for enabling waste water of a waste incineration power plant to reach the standard is a hot point in the field of sewage treatment.

The prior patent (application number: CN 202020101305.2) discloses a leachate treatment system of a waste incineration power plant, which comprises an adjusting tank, an anaerobic device, an anaerobic water production tank, an AMBR membrane device, a membrane advanced treatment device and a water production tank which are sequentially connected through pipelines, and the system also comprises a sludge tank and a concentrated solution collecting tank, wherein the anaerobic device and the AMBR membrane device are respectively connected with the sludge tank through pipelines, and the membrane advanced treatment device is connected with the concentrated solution collecting tank through pipelines. The utility model discloses a having that concentrate output is low, process flow is short, and the ammonia nitrogen in the filtration liquid is the denitration reductant through concentrated enrichment retrieval and utilization back, reduces pollutant treatment cost, and realizes resource recovery, practices thrift flue gas denitration stage material consumption. However, the high-concentration landfill leachate can impact sludge microorganisms of the biochemical treatment process, the biochemical pool is easy to generate 'dead sludge', and the subsequent membrane modules can be polluted and blocked in serious cases to stop the equipment.

Disclosure of Invention

The utility model aims at providing a waste water desalination system of waste incineration power plant that desalination is efficient, technology operation is stable to prior art not enough.

The system comprises an adjusting tank, a rotary disc filter tank, an ultrafiltration membrane component, a first-stage reverse osmosis device, a second-stage reverse osmosis device, a third-stage reverse osmosis device and an EDI component, wherein the adjusting tank, the rotary disc filter tank, the ultrafiltration membrane component, the first-stage reverse osmosis device, the second-stage reverse osmosis device, the third-stage reverse osmosis device and the EDI component are sequentially connected in series through pipelines, a pipeline at the bottom of the adjusting tank is connected into a water distribution channel at the upper part of the rotary disc filter tank, a group of water collecting cylinders with hollow structures are arranged on two opposite tank walls in the rotary disc filter tank, a plurality of sets of fiber rotary discs are arranged on the cylinder walls of the water collecting cylinders, the water outlet ends of the water collecting cylinders penetrate through the tank walls and are connected into a water collecting area at the rear part of the rotary disc filter tank, a water pump is arranged in the water collecting area and is connected with the reverse osmosis membrane of the pipeline between the rotary disc filter tank and the ultrafiltration membrane component, and a high-pressure water pump is arranged on the pipeline between the ultrafiltration membrane component and the first-stage reverse osmosis device, tertiary reverse osmosis unit's outlet conduit direct access EDI subassembly in the bottom of the ionic resin layer, EDI subassembly inside is equipped with 3 ionic resin layers of group, and outlet conduit is direct to be connected with the top of ionic resin layer.

Waste water containing percolate in a waste incineration power plant is firstly discharged into an adjusting tank to be mixed, then enters a rotary disc filtering tank to remove medium and small particles, the filtered sewage enters a water collecting area and then enters an ultrafiltration membrane component to be filtered through water pump suction, the small particles are removed, then enters a first-stage reverse osmosis device to be filtered through high-pressure water pump suction, then sequentially passes through a second-stage reverse osmosis device and a third-stage reverse osmosis device to be desalted and filtered, finally enters an EDI component to be subjected to electrodialysis and ion exchange treatment, and the treated purified water is discharged and recycled.

Furthermore, a pressure gauge is respectively arranged on the water inlet of the first-stage reverse osmosis device, the second-stage reverse osmosis device and the third-stage reverse osmosis device and used for monitoring the pressure in front of the membrane.

Furthermore, the ultrafiltration membrane component is provided with a water return pipe, the other end of the water return pipe is connected with the regulating tank, and concentrated water can flow back to the regulating tank.

Furthermore, one-level reverse osmosis unit, second grade reverse osmosis unit and tertiary reverse osmosis unit all are equipped with the backflow pipeline and communicate the equalizing basin, with concentrate backward flow to the equalizing basin.

Furthermore, branch pipes are arranged in the polar chamber and the concentrated chamber inside the EDI component and communicated with an external regulating reservoir to enable concentrated water and polar water to flow back to the regulating reservoir to dilute inlet water and concentrated water flowing back from the ultrafiltration membrane component and the reverse osmosis component.

The utility model has the advantages that:

1. the rotary disc filter tank, the membrane component, the reverse osmosis device and the EDI component are combined to treat the percolate wastewater of the refuse incineration plant, and a physical and chemical process is used for replacing a biochemical treatment process, so that the problem that the high-concentration percolate of refuse impacts the treatment process can be thoroughly solved.

2. Concentrated water and polar water generated by the EDI device flow back to the regulating tank, so that the water inlet concentration of the landfill leachate can be diluted, the load of a subsequent treatment process is reduced, and the service life of equipment is prolonged.

3. The reverse osmosis superposition EDI component is utilized to carry out leachate desalination treatment, and the treated effluent can be used for the production and living requirements of a power plant and can be recovered with running cost.

Drawings

Fig. 1 is a schematic structural diagram of the utility model.

In the figure: the device comprises a regulating tank 1, a rotary disc filtering tank 2, a fiber rotary disc 2.1, a water collecting barrel 2.2, a water distributing channel 2.3, a water collecting area 2.4, a water pump 2.5, an ultrafiltration membrane component 3, a first-stage reverse osmosis device 4, a high-pressure water pump 4.1, a second-stage reverse osmosis device 5, a third-stage reverse osmosis device 6, an EDI component 7.1, a polar chamber 7.2, a concentrated chamber 7.2, an ionic resin layer 8 and a pressure gauge 9.

Detailed Description

Example 1:

as shown in figure 1, the waste water desalination system of the waste incineration power plant comprises an adjusting tank 1, a rotary disc filter tank 2, an ultrafiltration membrane component 3, a primary reverse osmosis device 4, a secondary reverse osmosis device 5, a tertiary reverse osmosis device 6 and an EDI component 7, wherein the adjusting tank 1, the rotary disc filter tank 2, the ultrafiltration membrane component 3, the primary reverse osmosis device 4, the secondary reverse osmosis device 5, the tertiary reverse osmosis device 6 and the EDI component 7 are sequentially connected in series through a pipeline, a pipeline at the bottom of the adjusting tank 1 is connected into an upper water distribution channel 2.3 of the rotary disc filter tank 2, a group of water collecting cylinders 2.2 with hollow structures are arranged on two opposite tank walls in the rotary disc filter tank 2, a plurality of fiber rotary discs 2.1 are arranged on the cylinder walls of the water collecting cylinders 2.2, the water outlet ends of the water collecting cylinders 2.2 penetrate through the tank walls and are connected into a water collecting area 2.4 at the rear part of the rotary disc filter tank 2, a water pump 2.5 is arranged in the water collecting area 2.4, and the water pump 2.5 is connected with the inlet ends of the pipeline between the rotary disc filter tank 2 and the rotary disc component 3, a water return pipe is arranged on the ultrafiltration membrane component 3, the other end of the water return pipe is connected with the regulating tank, a high-pressure water pump 4.1 is arranged on a pipeline between the ultrafiltration membrane component 3 and the primary reverse osmosis device 4, and a pressure gauge 9 is respectively arranged on a water inlet of the primary reverse osmosis device 4, the secondary reverse osmosis device 5 and the tertiary reverse osmosis device 6; the first-stage reverse osmosis device 4, the second-stage reverse osmosis device 5 and the third-stage reverse osmosis device 6 are respectively provided with a return pipeline which is communicated with the regulating tank 1, and concentrate flows back to the regulating tank 1; the water outlet pipeline of the third-stage reverse osmosis device 6 is directly connected to the bottom end of the ionic resin layer 8 in the EDI component 7, 3 groups of ionic resin layers 8 are arranged in the EDI component 7, and the water outlet pipeline is directly connected with the top end of the ionic resin layer 8; branch pipes are arranged in the polar chamber 7.1 and the concentration chamber 7.2 in the EDI component 7 and communicated with the external regulating pool 1, and are used for returning concentrated water and polar water to the regulating pool 1 to dilute inlet water and returning concentrated water to the ultrafiltration membrane component 3 and the reverse osmosis component.

The waste water containing percolate in the waste incineration power plant is firstly discharged into an adjusting tank 1 for mixing, then enters a rotary disc filtering tank 2 for removing medium and small particles, the filtered sewage enters a water collecting area 2.4 and then enters an ultrafiltration membrane component 3 for filtering through a water pump 2.5, the small particles are removed, then enters a first-stage reverse osmosis device 4 for filtering through a high-pressure water pump 4.1 for filtering, then sequentially passes through a second-stage reverse osmosis device 5 and a third-stage reverse osmosis device 6 for desalting and filtering, finally enters an EDI component 7 for electrodialysis and ion exchange treatment, and the treated purified water is discharged for recycling.

Claims

1. The utility model provides a waste water desalination system of msw incineration power plant, includes equalizing basin, carousel filtering ponds, milipore filter subassembly, one-level reverse osmosis unit, second grade reverse osmosis unit, tertiary reverse osmosis unit, EDI subassembly, equalizing basin, carousel filtering ponds, milipore filter subassembly, one-level reverse osmosis unit, second grade reverse osmosis unit, tertiary reverse osmosis unit, EDI subassembly pass through pipeline series connection in proper order, its characterized in that: the upper portion of the access carousel filtering ponds of the pipeline of equalizing basin bottom joins in marriage in the canal, install a set of hollow structure's a set of water-collecting drum on the relative two sides pool wall in the carousel filtering ponds, install a plurality of sets of fibre turntables on the section of thick bamboo wall of water-collecting drum, the water outlet end of water-collecting drum passes the pool wall and inserts the water-collecting zone at carousel filtering ponds rear portion, be equipped with a water pump in the water-collecting zone, the entrance point of carousel filtering ponds and milipore filter subassembly inter-unit pipeline is connected to the water pump, install a high pressure water pump on the pipeline between milipore filter subassembly and the one-level reverse osmosis unit, tertiary reverse osmosis unit's outlet conduit direct access EDI subassembly in the ionic resin layer's bottom, EDI subassembly inside is equipped with 3 groups of ionic resin layer (8), outlet conduit is direct to be connected with the top of ionic resin layer.

2. The waste water desalination system of a waste incineration power plant according to claim 1, characterized in that: the first-stage reverse osmosis device, the second-stage reverse osmosis device and the third-stage reverse osmosis device are respectively provided with a pressure gauge on a water inlet.

3. The waste water desalination system of a waste incineration power plant according to claim 1, characterized in that: the ultrafiltration membrane component is provided with a water return pipe, and the other end of the water return pipe is connected with the regulating tank.

4. The waste water desalination system of a waste incineration power plant according to claim 1, characterized in that: the first-stage reverse osmosis device, the second-stage reverse osmosis device and the third-stage reverse osmosis device are all provided with return pipelines communicated with the regulating tank.

5. The waste water desalination system of a waste incineration power plant according to claim 1, characterized in that: branch pipes are arranged in the electrode chamber and the concentration chamber inside the EDI component and communicated with an external regulating tank.