CN206843268U - A kind of industrial tail end wastewater zero-discharge treatment system - Google Patents
A kind of industrial tail end wastewater zero-discharge treatment system Download PDFInfo
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- CN206843268U CN206843268U CN201720402567.0U CN201720402567U CN206843268U CN 206843268 U CN206843268 U CN 206843268U CN 201720402567 U CN201720402567 U CN 201720402567U CN 206843268 U CN206843268 U CN 206843268U
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Abstract
The utility model discloses a kind of industrial tail end wastewater zero-discharge treatment system, including pretreatment melded system, film processing system and evaporation and crystallization system：The pretreatment melded system includes preliminary clarifier, waste water tank, Aeration fan, neutralization case, flow tank, flocculation tanks, depositing reservoir and plate and frame filter press；The film processing system includes micro-filtration, the nanofiltration of dish tubular type and disc tube reverse osmosis (dt-ro), and the evaporation and crystallization system includes crystallizing evaporator and baling press.The utility model uses NaOH, Na2CO3Dual alkali softens, and compared with the lime-soda process of routine, reduces softening added amount of chemical, operating cost is remarkably decreased；Crystalline salt by evaporation is high-purity technical grade sodium chloride, purity more than 98.5%, reaches one-level Nacl standard, can be used as merchandise sales recovery certain cost, realize by-product resource.
Description
Technical field
It the utility model is related to a kind of water treatment system, and in particular to a kind of industrial tail end wastewater zero-discharge treatment system.
Background technology
Currently, the pollution of industrial wastewater has become the stumbling-block of China's economic development, the also life to broad masses of the people
Production and life cause greatly to injure.In most of waste water of the industries such as electric power, coal chemical industry, have corresponding processing method,
But its tail end wastewater, such as：The desulfurization wastewater etc. of reverse osmosis concentrated water, power industry, fails effectively to handle, realizes waste water zero-emission
Put.This kind of waste water has same feature：High salinity, high rigidity, variation water quality be not big, disposable.Existing treatment technology and side
Method is also immature, various problems after putting into operation be present：1st, operating cost is high, mainly：System energy consumption is high, sofening treatment medicament
It is more, sludge quantity is big etc.；2nd, dirty stifled, short time in the Chemical cleaning cycle length of the easy fouling of equipment.3rd, accessory substance category caused by evaporative crystallization
Value is reused in solid waste, nothing.
Utility model content
Purpose of utility model：The purpose of this utility model is to solve deficiency of the prior art, there is provided one kind operation
Cost, equipment performance are reliable, the industrial tail end wastewater zero-discharge treatment system of by-product resource.
Technical scheme：A kind of industrial tail end wastewater zero-discharge treatment system described in the utility model, including pretreatment are soft
Change system, film processing system and evaporation and crystallization system：
It is described pretreatment melded system include preliminary clarifier, waste water tank, Aeration fan, neutralize case, flow tank, flocculation tanks,
Depositing reservoir and plate and frame filter press, the preliminary clarifier, waste water tank, neutralization case, flow tank, flocculation tanks, depositing reservoir are sequentially connected with, institute
State waste water tank and be connected with Aeration fan, preliminary clarifier and the depositing reservoir bottom is respectively connected with plate and frame filter press；
The film processing system includes micro-filtration, the nanofiltration of dish tubular type and disc tube reverse osmosis (dt-ro), the input of the micro-filtration and institute
The output end connection of depositing reservoir is stated, the output end of the micro-filtration has been sequentially connected with the nanofiltration of dish tubular type and disc tube reverse osmosis (dt-ro)；
The evaporation and crystallization system includes crystallizing evaporator and baling press, the input of the crystallizing evaporator and the dish
The output end connection of tubular type counter-infiltration, the output end of the crystallizing evaporator are connected with baling press.
Further, the top of the preliminary clarifier is connected with the top of the water tank.
Further, sodium hydroxide has been added in the neutralization case, sodium carbonate has been added in flow tank, has been added in flocculation tanks
There is flocculant.
Further, concentrated water caused by micro-filtration and dish the tubular type nanofiltration is connected with pretreatment melded system.
Further, the production water of the disc tube reverse osmosis (dt-ro) and crystallizing evaporator is connected with industrial water system.
Beneficial effect：The beneficial effects of the utility model are as follows：
1) NaOH, Na are used2CO3Dual alkali softens, and compared with the lime-soda method of routine, reduces softening adding of agent
Amount, operating cost are remarkably decreased；
2) crystalline salt by evaporation is high-purity technical grade sodium chloride, purity more than 98.5%, reaches one-level Nacl standard, can
Certain cost is reclaimed as merchandise sales, realizes by-product resource；
3) system does not have salt-mixture output, it is not necessary to extra salt-mixture disposal costs；
4) by softening process, ensure that the subsequent evaporation crystal system descaling rinsing cycle is not less than 6 months；
5) sulfate radical in nanofiltration concentrate participates in pretreatment softening reaction as softening medicament, reduces softening medicament
Dosage；
6) evaporative crystallization uses MVR techniques, and evaporation and crystallization system need not feed raw steam when running, reduce operation into
This；
7) industrial tail end wastewater is avoided because dealing with improperly, harm, the production to broad masses of the people to caused by environment
And life damages.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
Embodiment
A kind of industrial tail end wastewater zero-discharge treatment system as shown in Figure 1, including pretreatment melded system, film process system
System and evaporation and crystallization system：
The pretreatment melded system includes preliminary clarifier 1, waste water tank 2, Aeration fan 3, neutralization case 4, flow tank 5, wadding
Solidifying case 6, depositing reservoir 7 and plate and frame filter press 8, the preliminary clarifier 1, waste water tank 2, neutralize case 4, flow tank 5, flocculation tanks 6, clarification
Pond 7 is sequentially connected with, and the waste water tank 2 is connected with Aeration fan 3, and preliminary clarifier 1 and depositing reservoir 7 bottom is respectively connected with sheet frame
Filter press 8；
The film processing system includes micro-filtration 9, dish tubular type nanofiltration 10 and disc tube reverse osmosis (dt-ro) 11, the input of the micro-filtration 9
End is connected with the output end of the depositing reservoir 7, and the output end of the micro-filtration 9 has been sequentially connected with dish tubular type nanofiltration 10 and dish tubular type is anti-
Infiltration 11；
The evaporation and crystallization system includes crystallizing evaporator 12 and baling press 13, the input of the crystallizing evaporator 12 with
The output end connection of the disc tube reverse osmosis (dt-ro) 11, the output end of the crystallizing evaporator 12 are connected with baling press 13.
The top of the preliminary clarifier 1 is connected with the top of the water tank 2.
Sodium hydroxide has been added in the neutralization case 4, sodium carbonate has been added in flow tank 5, flocculation has been added in flocculation tanks 6
Agent.
Concentrated water caused by the micro-filtration 9 and dish tubular type nanofiltration 10 is connected with pretreatment melded system.
The production water of the disc tube reverse osmosis (dt-ro) 11 and crystallizing evaporator 12 is connected with industrial water system.
A kind of handling process of above-mentioned industrial tail end wastewater zero-discharge treatment system, comprises the following steps：
1) industrial tail end wastewater initially enters preliminary clarifier 1, reduces SS by clarification, preliminary clarifier 1 plays buffering in addition
The effect of industrial tail end wastewater is adjusted, heavy mud to the press filtration of plate and frame filter press 8；
2) supernatant of preliminary clarifier 1 gravity flow enters waste water tank 2, is aerated, reached into waste water tank 2 by Aeration fan 3
Reduce the COD in waste water；
3) waste water after aeration flows automatically to enter through waste water tank 2 neutralizes case 4, NaOH is added to neutralizing in case 4, in stirring
Under the conditions of, pH value is adjusted, iron, zinc, lead, nickel and chromium generation hydroxide are separated out, and fluorine ion generation CaF2 is separated out, and silicon is formed
CaSiO3 is separated out, and magnesium ion reaction generation magnesium hydroxide separates out；
4) the neutralized gravity flow of case 4 of waste water enters flow tank 5, and Na is added into flow tank 52CO3,Under conditions of stirring, adjust
PH value is saved, calcium ion reaction generation calcium carbonate separates out；
5) neutralized case 4 and the gravity flow of the dosing of flow tank 5 reacted waste water enter flocculation tanks 6, under conditions of stirring and
The flocculant added forms segregative bulky grain；
6) waste water flows automatically after flocculation tanks 6 form segregative bulky grain enters depositing reservoir 7, and it is soft to reach water outlet by clarification
Change, go the purpose of removing heavy metals, sediment to the press filtration of plate and frame filter press 8, mud cake outward transport disposal；
7) supernatant of depositing reservoir 7 filters through micro-filtration 9, filters out nanoscale suspension, colloid, particulate, bacterium and disease in waste water
Malicious macromolecular substances, production water to dish tubular type nanofiltration 10 are filtered, and the concentrate concentrate recirculation rich in sulfate radical is to pre-processing softening system
System；
8) dish tubular type nanofiltration 10 is produced water and handled through disc tube reverse osmosis (dt-ro) 11, concentrate recirculation to melded system；
9) production of disc tube reverse osmosis (dt-ro) 11 water is used as industrial water, the concentrate supply subsequent evaporation crystallization processes system of saliferous
System concentrated water is evaporated through crystallizing evaporator 12；
10) the evaporation product Water circulation of crystallizer 12 does industrial water, and product salt is packed through baling press 13 and packed.
Industrial tail end wastewater water quality property is mostly：High salinity, high rigidity, variation water quality are big, wherein containing high concentration
Cl-、SO4 2-、Na+、Ca2+、Mg2+Plasma.This kind of waste water typically uses evaporation process, needs to realize in processing procedure：Low fortune
Row cost, equipment performance are reliable, the technical problem of by-product resource.
To ensure evaporation and crystallization system stable operation, it is necessary to first carry out softening pretreatment to it.It is presently used for sofening treatment
Medicament have it is a variety of：Lime, soda ash, sodium hydroxide etc., due to using Ca (OH)2 The Ca in waste water can be caused2+Concentration raises,
And add processing Ca2+Pharmaceutical quantities, and caused sludge quantity is big, and NaOH and Na is used in softening process2CO3Dual alkali it is soft
Change.
To realize the technical problem of by-product resource, membranous system has been used on stream, and micro-filtration filters out nanometer in waste water
Level suspension, colloid, particulate, bacterium and virus macromolecular material, DTNF have retained the concentrate rich in sulfate radical, DTRO retentions
Contain Cl-Concentrate, to realize accessory substance NaCl purity.
To realize the reliable technical problem of equipment performance, each segment process used on stream is all relatively ripe, had
More practical application example, crucial excessively stream material selection titanium, service life of equipment can use DCS up to the control of 30 years, system
Or PLC is automatically controlled, realize unattended.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, although the utility model is disclosed above with preferred embodiment, but be not limited to the utility model, it is any ripe
Professional and technical personnel is known, is not being departed from the range of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment made a little change or be modified to equivalent variations, as long as being without departing from technical solutions of the utility model
Hold, any simple modification, equivalent change and modification made according to the technical essence of the utility model to above example, still
Belong in the range of technical solutions of the utility model.
Claims (5)
- A kind of 1. industrial tail end wastewater zero-discharge treatment system, it is characterised in that：Including pretreatment melded system, film processing system And evaporation and crystallization system：The pretreatment melded system includes preliminary clarifier（1）, waste water tank（2）, Aeration fan（3）, neutralize case（4）, flow tank （5）, flocculation tanks（6）, depositing reservoir（7）And plate and frame filter press（8）, the preliminary clarifier（1）, waste water tank（2）, neutralize case（4）, it is heavy Case drops（5）, flocculation tanks（6）, depositing reservoir（7）It is sequentially connected with, the waste water tank（2）It is connected with Aeration fan（3）, the presettling Pond（1）And depositing reservoir（7）Bottom is respectively connected with plate and frame filter press（8）；The film processing system includes micro-filtration（9）, dish tubular type nanofiltration (10) and disc tube reverse osmosis (dt-ro) (11), the micro-filtration（9）'s Input and the depositing reservoir（7）Output end connection, the micro-filtration（9）Output end be sequentially connected with dish tubular type nanofiltration (10) With disc tube reverse osmosis (dt-ro) (11)；The evaporation and crystallization system includes crystallizing evaporator（12）And baling press（13）, the crystallizing evaporator（12）Input It is connected with the output end of the disc tube reverse osmosis (dt-ro) (11), the crystallizing evaporator（12）Output end be connected with baling press （13）.
- A kind of 2. industrial tail end wastewater zero-discharge treatment system according to claim 1, it is characterised in that：The presettling Pond（1）Top and the waste water tank（2）Top connection.
- A kind of 3. industrial tail end wastewater zero-discharge treatment system according to claim 1, it is characterised in that：The neutralization case （4）Sodium hydroxide, flow tank are inside added（5）Sodium carbonate, flocculation tanks are inside added（6）Flocculant is inside added.
- A kind of 4. industrial tail end wastewater zero-discharge treatment system according to claim 1, it is characterised in that：The micro-filtration （9）With dish tubular type nanofiltration (10) caused by concentrated water with pretreatment melded system be connected.
- A kind of 5. industrial tail end wastewater zero-discharge treatment system according to claim 1, it is characterised in that：The dish tubular type Counter-infiltration (11) and crystallizing evaporator（12）Production water be connected with industrial water system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107055904A (en) * | 2017-04-18 | 2017-08-18 | 江苏京源环保股份有限公司 | A kind of industrial tail end wastewater zero-discharge treatment system and technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107055904A (en) * | 2017-04-18 | 2017-08-18 | 江苏京源环保股份有限公司 | A kind of industrial tail end wastewater zero-discharge treatment system and technique |
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