CN213680239U - Integrated system for resource treatment of bromine-containing wastewater - Google Patents

Abstract

The utility model relates to an integrated system of bromine-containing waste water resourceful treatment, this system include hypergravity decarbonization device, receive the filter, receive and filter and produce water tank, one-level reverse osmosis unit, second grade reverse osmosis unit and high-pressure reverse osmosis unit. The hypergravity decarbonization device is connected with a nanofiltration device through a decarbonization waste water pipeline, the nanofiltration device is connected with an ultrafiltration water production tank and is connected with a divalent salt discharge pipeline; the top of the ultrafiltration water production tank is respectively connected with the secondary reverse osmosis device and the high-pressure reverse osmosis device, and the bottom of the ultrafiltration water production tank is connected with the primary reverse osmosis device; the first-stage reverse osmosis device is connected with a concentrated water discharge pipeline and is sequentially connected with the second-stage reverse osmosis device and the high-pressure reverse osmosis device; the high-pressure reverse osmosis device is connected with an evaporation concentration device, and the evaporation concentration device is respectively connected with a concentrated water delivery pipeline and a produced water recycling pipeline. The utility model discloses can effectively reduce bromide ion concentration, realize this type of bromine-containing waste water's resourceful treatment purpose.

Description

Integrated system for resource treatment of bromine-containing wastewater

Technical Field

The utility model relates to a useless processing field of danger especially relates to an integrated system that contains bromine waste water resourceful treatment.

Background

The wastewater in the production process of the chemical device mainly comes from process wastewater, residue slurry, wastewater discharged by irregular cleaning, maintenance, parking, cleaning and the like, mainly contains terephthalic acid, benzoic acid, purified terephthalic acid, acetic acid, formic acid, acetate and the like, has the characteristics of high organic matter concentration, complex components, large water quantity and water quality change range and the like, and belongs to one of industrial wastewater difficult to treat.

The waste water contains a large amount of sodium bromide, and if the sodium bromide directly enters a sewage treatment system, the waste water can cause irreversible and huge impact on the sewage treatment system, so the bromine-containing waste water belongs to hazardous waste and is difficult to effectively treat. Therefore, the development of a treatment system capable of recycling the bromine-containing wastewater is of great significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an integrated system for effectively reducing bromine ion concentration and recycling bromine-containing wastewater is provided.

In order to solve the problem, the integrated system for the resource treatment of the bromine-containing wastewater of the utility model is characterized in that: the system comprises a hypergravity decarbonization device, a nanofiltration water production tank, a primary reverse osmosis device, a secondary reverse osmosis device and a high-pressure reverse osmosis device; the hypergravity decarbonization device is connected with the nanofiltration device through a decarbonization waste water pipeline, the nanofiltration device is connected with the ultrafiltration water production tank through a pipeline I, and a divalent salt discharge pipeline is connected; the top of the ultrafiltration water production tank is respectively connected with the secondary reverse osmosis device and the high-pressure reverse osmosis device through a pipeline II, and the bottom of the ultrafiltration water production tank is connected with the primary reverse osmosis device through a pipeline III; the first-stage reverse osmosis device is connected with a concentrated water discharge pipeline and is sequentially connected with the second-stage reverse osmosis device and the high-pressure reverse osmosis device through a pipeline IV; the high-pressure reverse osmosis device is connected with an evaporation concentration device, and the evaporation concentration device is respectively connected with a concentrated water delivery pipeline and a produced water recycling pipeline.

The hypergravity decarbonization device comprises a pipeline mixer, a decarbonization reactor and an acid storage tank; the top of the pipeline mixer is connected with the acid storage tank through an acid addition pump, one side of the pipeline mixer is provided with a bromine-containing waste water pipeline, and the other side of the pipeline mixer is connected with the decarbonization reactor through a pipeline V; the middle part of the decarbonization reactor is provided with a compressed air input pipeline, the bottom of the decarbonization reactor is provided with the decarbonization waste water pipeline, and the decarbonization waste water pipeline is connected with the nanofiltration device.

Compared with the prior art, the utility model has the following advantage:

1. the utility model discloses in be equipped with hypergravity decarbonization device, consequently, the desorption of carbonate just can be realized before getting into follow-up system to the carbonate in the waste water.

2. The utility model discloses in be equipped with the nanofiltration device, can realize the separation of univalent and divalent salt in the waste water, can obtain the higher univalent salt of purity in the product water side of nanofiltration device.

3. The utility model discloses in be equipped with one, second grade reverse osmosis unit and high pressure reverse osmosis unit for the bromide ion maintains lower level (below 78 mg/L) in the product water, and the TDS concentration of product water is not higher than 180 mg/L, and COD is on the high side in the product water.

4. The utility model discloses adopt self to produce steam and carry out the concentrated technology of evaporation at the evaporation concentration in-process, reduce outside steam demand, also reduced the energy consumption of whole device system simultaneously.

5. The utility model discloses a hypergravity decarbonization device, the membrane is concentrated, the mode that the evaporation concentration device combined together, carry out concentrated processing to bromine-containing waste water through physical method, finally produce monovalent bromine salt, can guarantee that concentrated sodium bromide waste water reaches the recoverable rank of industry, waste water reaches "urban sewage regeneration utilizes industrial water quality of water" (GB/T19923-2005) open-type recirculating cooling water system moisturizing water quality of water standard after handling, the problem that bromine-containing waste water is difficult to handle has effectively been solved, finally form the sodium bromide that can industrial application, sodium sulfate and production technology recycling water, realize the resourceful treatment purpose of this type of bromine-containing waste water.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1-a line mixer; 2-a decarbonization reactor; 3-a nanofiltration device; 4-nanofiltration water production tank; 5-a first-stage reverse osmosis device; 6-a secondary reverse osmosis device; 7-a high pressure reverse osmosis unit; 8-an evaporation concentration device; 9-acid storage tank; 10-acid addition pump.

Detailed Description

As shown in fig. 1, an integrated system for resource treatment of bromine-containing wastewater comprises a hypergravity decarbonization device, a nanofiltration device 3, a nanofiltration water production tank 4, a primary reverse osmosis device 5, a secondary reverse osmosis device 6 and a high-pressure reverse osmosis device 7. The hypergravity decarbonization device is connected with a nanofiltration device 3 through a decarbonization waste water pipeline, the nanofiltration device 3 is connected with an ultrafiltration water production tank 4 through a pipeline I, and a divalent salt discharge pipeline is connected; the top of the ultrafiltration product water tank 4 is respectively connected with the secondary reverse osmosis device 6 and the high-pressure reverse osmosis device 7 through a pipeline II, and the bottom of the ultrafiltration product water tank is connected with the primary reverse osmosis device 5 through a pipeline III; the first-stage reverse osmosis device 5 is connected with a concentrated water discharge pipeline, and the first-stage reverse osmosis device 5 is sequentially connected with a second-stage reverse osmosis device 6 and a high-pressure reverse osmosis device 7 through a pipeline IV; the high-pressure reverse osmosis device 7 is connected with an evaporation concentration device 8, and the evaporation concentration device 8 is respectively connected with a concentrated water delivery pipeline and a produced water recycling pipeline.

Wherein: the hypergravity decarbonization device comprises a pipeline mixer 1, a decarbonization reactor 2 and an acid storage tank 9. The top of the pipeline mixer 1 is connected with an acid storage tank 9 through an acid addition pump 10, one side of the pipeline mixer is provided with a bromine-containing waste water pipeline, and the other side of the pipeline mixer is connected with the decarbonization reactor 2 through a pipeline V; the decarbonization reactor 2 is provided with a compressed air input line at the middle part and a decarbonization waste water line at the bottom part, and the decarbonization waste water line is connected with the nanofiltration device 3.

The specification and model of the nanofiltration device 3 are DJNL-10, the specification and model of the primary reverse osmosis device 5 are DJFST-10, the specification and model of the secondary reverse osmosis device 6 are DJFST-20, the specification and model of the high-pressure reverse osmosis device 7 are DJFST-130, and manufacturers of the nanofiltration device are Beijing Dajing Konjin easy-to-pass scientific and technological development limited companies.

The evaporation concentration device 8 is a mechanical steam recompression device, steam generated by evaporation is preferably used for steam stripping, and the concentration of monovalent bromine salt in concentrated water can reach more than 20 percent or the monovalent bromine salt is directly evaporated and concentrated to obtain solid sodium bromide.

The working process of the utility model is as follows:

the method comprises the steps of discharging bromine-containing wastewater into a high-gravity decarburization device, adding a sulfuric acid solution into the high-gravity decarburization device, and removing generated tail gas by using nitrogen;

the bromine-containing waste water with the carbonate removed through the steps enters a nanofiltration device 3, more than 95% of divalent salt is separated, and the purity of sodium bromide in the concentrated waste water is ensured;

thirdly, the bromine-containing wastewater with divalent salts such as sulfate radicals removed through the second step enters a first-stage reverse osmosis device 5, more than 90% of monovalent bromide ions are separated to the reverse osmosis concentrated water side, reverse osmosis water production containing less than 5% of monovalent bromide salts enters the fourth step for treatment, and bromide ions in the wastewater are further recovered;

step four, the treated primary reverse osmosis produced water enters a secondary reverse osmosis device 6 to be further concentrated and recycled to bromide ions in the wastewater, concentrated water obtained after concentration of the secondary reverse osmosis device 6 is conveyed to the water inlet side of the primary reverse osmosis device 5, and the secondary reverse osmosis produced water is collected in a centralized mode and used as supplementary water of a production device;

step fifthly, enabling the primary reverse osmosis concentrated water obtained after the treatment to enter a high-pressure reverse osmosis device 7, mixing the high-pressure reverse osmosis produced water and the primary reverse osmosis produced water, conveying the mixture to the secondary reverse osmosis water inlet side, recycling bromide ions in the wastewater, concentrating the bromide ions in the bromine-containing wastewater by the high-pressure reverse osmosis device 7 to reach a concentration of more than 10%, and then processing the wastewater in the step sixteenth;

sixthly, the high-pressure reverse osmosis concentrated water treated in the step I enters an evaporation concentration device 8, monovalent bromide ion concentration in the evaporation concentration device 8 is higher than 20% or the concentrated solution is concentrated to obtain sodium bromide solid particles, and condensed water produced by the evaporation concentration device 8 and secondary reverse osmosis produced water are mixed together and used for replenishing water for a production device.

The present invention will be further explained with reference to the following embodiments:

example 1

1. The embodiment of the scheme is exemplified by adopting bromine-containing wastewater discharged by a certain production company, and the bromine-containing wastewater mainly comprises the following components: acetic acid, methyl acetate, methanol, formaldehyde, benzoic acid, terephthalic acid, bicarbonate ions;

2. removing bicarbonate radicals from the wastewater by a supergravity decarbonization device;

3. and the wastewater after the pretreatment process is sequentially concentrated by a primary reverse osmosis device 5, a secondary reverse osmosis device 6, a high-pressure reverse osmosis device 7 and an evaporation concentration device 8 until the bromine concentration of the monovalent bromine salt is more than 20 percent or solid monovalent bromine salt is obtained.

TABLE 1 quality of reclaimed water

Note: the monitoring data is based on the third-party detection spectral attenuation detection result.

The water quality of the reclaimed water is shown in Table 1, the content of bromine ions in the reclaimed wastewater is less than or equal to 10 mg/L, the content of soluble total solids is less than or equal to 200 mg/L, the content of calcium ions is less than or equal to 1mg/L, the content of COD is less than or equal to 40mg/L, the content of TOC is less than or equal to 500mg/L, the turbidity is less than or equal to 0.5 mg/L, and the content of suspended matters is less than or equal to 5 mg/L.

Claims (2)

1. The utility model provides an integrated system that contains bromine waste water resourceful treatment which characterized in that: the system comprises a hypergravity decarbonization device, a nanofiltration device (3), a nanofiltration water production tank (4), a primary reverse osmosis device (5), a secondary reverse osmosis device (6) and a high-pressure reverse osmosis device (7); the hypergravity decarbonization device is connected with the nanofiltration device (3) through a decarbonization waste water pipeline, the nanofiltration device (3) is connected with the nanofiltration water production tank (4) through a pipeline I, and a divalent salt discharge pipeline is connected in parallel; the top of the nanofiltration water production tank (4) is respectively connected with the secondary reverse osmosis device (6) and the high-pressure reverse osmosis device (7) through a pipeline II, and the bottom of the nanofiltration water production tank is connected with the primary reverse osmosis device (5) through a pipeline III; the primary reverse osmosis device (5) is connected with a concentrated water discharge pipeline, and the primary reverse osmosis device (5) is sequentially connected with the secondary reverse osmosis device (6) and the high-pressure reverse osmosis device (7) through a pipeline IV; the high-pressure reverse osmosis device (7) is connected with an evaporation concentration device (8), and the evaporation concentration device (8) is respectively connected with a concentrated water delivery pipeline and a produced water recycling pipeline.

2. The integrated system for the resource treatment of bromine-containing wastewater of claim 1, which is characterized in that: the hypergravity decarbonization device comprises a pipeline mixer (1), a decarbonization reactor (2) and an acid storage tank (9); the top of the pipeline mixer (1) is connected with the acid storage tank (9) through an acid addition pump (10), one side of the pipeline mixer is provided with a bromine-containing waste water pipeline, and the other side of the pipeline mixer is connected with the decarbonization reactor (2) through a pipeline V; the middle part of the decarbonization reactor (2) is provided with a compressed air input pipeline, the bottom of the decarbonization reactor is provided with the decarbonization waste water pipeline, and the decarbonization waste water pipeline is connected with the nanofiltration device (3).

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