CN205773469U - A kind of crystallization apparatus for realizing desulfurization wastewater zero-emission - Google Patents
A kind of crystallization apparatus for realizing desulfurization wastewater zero-emission Download PDFInfo
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- CN205773469U CN205773469U CN201620553945.0U CN201620553945U CN205773469U CN 205773469 U CN205773469 U CN 205773469U CN 201620553945 U CN201620553945 U CN 201620553945U CN 205773469 U CN205773469 U CN 205773469U
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Abstract
This utility model relates to a kind of crystallization apparatus for realizing desulfurization wastewater zero-emission, including: flash tank, including tank body and the salt lower limb being arranged on tank base, it is provided with loop exit, loop head, steam outlet on this tank body, this salt lower limb is provided with waterwater entrance and is positioned at the magma outlet below this waterwater entrance；Heat exchanger, there is circulation fluid entrance, circulation fluid outlet, steam inlet and condensation-water drain, this circulation fluid entrance is attached by the loop exit of the first circulating line with flash tank, and the outlet of this circulation fluid is attached by the loop head of the second circulating line with flash tank；Circulating pump, is arranged on the first circulating line；Two-stage Mechanical Vapor Compression, has steam inlet and steam (vapor) outlet, and this steam inlet connects the steam outlet of flash tank by the first jet chimney, and this steam (vapor) outlet connects the steam inlet of heat exchanger by the second jet chimney.Crystallization apparatus of the present utility model has can the advantage of operation safe and stable, effective.
Description
Technical field
This utility model relates to field of waste water treatment；More particularly, this utility model relates to a kind of for realizing desulfurization
The crystallization apparatus of wastewater zero discharge.
Background technology
Desulfurization wastewater is to be used wet desulphurization to process produced tail end wastewater in process of production by power plant, has height and contains
Salt amount, the characteristic of highly corrosive, so that carry out safe and stable process to it.Current domestic desulfurization wastewater mostly uses and adds
Directly discharging after medicine coagulating kinetics, the substantial amounts of dissolubility salt still contained in the sewage of discharge, this type of method not only has
It is likely to result in secondary pollution, also cannot meet the theory requirement of environmental protection instantly simultaneously.Based on this, the concept of desulfurization wastewater zero-emission
By in the process being widely used in desulfurization wastewater.
Chinese patent application CN201310555063.9 discloses a kind of desulfurization wastewater zero discharge treatment device and method, profit
With the dosing in reverse osmosis concentrated salt water pretreatment process, precipitate membrance concentration and sea water film and the combination of anti-pollution high-pressure membrane, by height
Press mold salinity out about 15～the flyash reactive crystallization of strong brine and ash field of 20%, the desulfurization forming complete set is given up
Water " zero-emission " processes process system.
Chinese patent application CN201510529034.4 discloses a kind of desulfurization wastewater zero-discharge treatment system, and this system is adopted
" zero-emission " of desulfurization wastewater is achieved by coagulating sedimentation, ultrafiltration, reverse osmosis, the technique of evaporative crystallization.
Although all can realize the zero-emission of desulfurization wastewater, but there is desulfurization wastewater zero discharge treatment and set in technique scheme
The standby defect being difficult to safe and stable operation.Accordingly, it is desirable to provide the crystallization for realizing desulfurization wastewater zero-emission of a kind of improvement
Device.
Summary of the invention
For the deficiencies in the prior art, main purpose of the present utility model is that offer one can be safe and stable, effective
The crystallization apparatus for realizing desulfurization wastewater zero-emission run.
In order to realize above-mentioned main purpose, this utility model provides a kind of crystallization for realizing desulfurization wastewater zero-emission
Device, comprising:
Flash tank, including tank body and the salt lower limb being arranged on tank base；Wherein, tank body is provided with loop exit, circulation
Entrance, steam outlet, salt lower limb is provided with waterwater entrance and is positioned at the magma outlet below waterwater entrance；
Heat exchanger, has circulation fluid entrance, circulation fluid outlet, steam inlet and condensation-water drain；Wherein, circulation fluid
Entrance is attached by the loop exit of the first circulating line with flash tank, and circulation fluid exports by the second circulating line and sudden strain of a muscle
The loop head of steaming pot is attached；
Circulating pump, is arranged on the first circulating line；
Two-stage Mechanical Vapor Compression, has steam inlet and steam (vapor) outlet；Wherein, the first steam pipe is passed through in steam inlet
Road connects the steam outlet of flash tank, and steam (vapor) outlet connects the steam inlet of heat exchanger by the second jet chimney.
This utility model is mainly for the treatment of desulfurization wastewater, and desulfurization wastewater is evaporated dense by the way of flash distillation by it
Contracting, and the indirect steam evaporating generation is compressed recycling by vapour compression machine, it is achieved the thermal source needed for evaporation is entirely by electricity
Can convert.In this utility model, waste water pressure in a heat exchanger is higher than the pressure on flash tank top, and concentrated solution exists
Becoming superheated liquid after obtaining heat in heat exchanger, after entering flash tank, boiling temperature declines immediately, thus can realize dodging
Steam.
This utility model uses mechanical steam recompression technology (MVR), and uses tandem type two-stage compressor, improves pressure
Steam pressure after contracting and temperature, as efficiently as possible be applicable to desulfurization wastewater Zero-discharge treating process.It addition, employing two-stage
Mechanical Vapor Compression also makes to provide steam without the external world during system is properly functioning, thus reduces as far as possible and set
Standby operating cost.
In this utility model, it is preferable that heat exchanger is arranged on underface or the obliquely downward of flash tank.
As a kind of detailed description of the invention, steam outlet is arranged on the top of flash tank tank body.
As another detailed description of the invention, loop head is positioned on loop exit.
As another detailed description of the invention, the quantity of waterwater entrance is at least two.
As another detailed description of the invention, the waste water that waterwater entrance is constructed so that in salt lower limb produces eddy flow.
As another detailed description of the invention, the top of tank inner chamber is provided with demister.
Preferably, above-mentioned demister is double-deck demister, including being positioned at the deflection plate of lower floor and being positioned at the silk screen on upper strata.
As another detailed description of the invention, the first circulating line is provided with main waterwater entrance.
Compared with prior art, first crystallization apparatus of the present utility model has the advantage that, have employed two-stage machinery and steams
Vapour compressor so that crystallization apparatus can safe and stable, effectively and at low cost run.Secondly, arrange in the bottom of flash tank
Salt lower limb, this salt lower limb can play the collection effect such as salt, classification, washing, back dissolving soluble impurity, conveying, the most wherein useless
When the waste water that water inlet is constructed so that in salt lower limb produces eddy flow, it is possible to realize efficiently eluriating, cool down, classify and increasing
Thick.
Accompanying drawing explanation
Fig. 1 is the structural representation of the crystallization apparatus as this utility model one embodiment.
Detailed description of the invention
Fig. 1 shows a kind of preferred embodiment of this utility model crystallization apparatus.As it is shown in figure 1, the present embodiment is used for
The crystallization apparatus realizing desulfurization wastewater zero-emission includes flash tank 1, heat exchanger 2, circulating pump 3 and two-stage mechanical vapor-compression
Machine 4.Wherein:
Flash tank 1 is for the flash concentration of desulfurization wastewater, the salt lower limb that the bottom including tank body 10 and with tank body 10 is connected
11.Wherein, tank body 10 bottom is provided with loop exit 101, and top is provided with loop head 102, and top is provided with discharge of steam
Mouth 103；It is provided with waterwater entrance 111 on salt lower limb 11 and is positioned at the magma outlet 112 below waterwater entrance 111.It addition, tank body 10
The top of inner chamber is additionally provided with double-deck demister 104, the lower floor of double-deck demister 104 be deflection plate form, upper strata be wire mesh shape
Formula.
Waste water that waterwater entrance 111 is constructed so that in salt lower limb 11 produces eddy flow, waste-water vortex make crystal salt grain make from
The heart moves, and due to centrifugal action, the crystal salt grain that particle diameter is bigger moves to the inwall of salt lower limb 11 and by magma outlet 112 discharge,
And thinner crystal salt grain continued growth in salt lower limb 11.Therefore, it can obtain the more uniform crystal salt grain of granularity.
The Main Function of heat exchanger 2 is heated waste water, and it has circulation fluid outlet 21, circulation fluid entrance 22, steam enter
Mouth 23, condensation-water drain 24.Wherein, pass through between circulation fluid entrance 22 and the loop exit 101 of flash tank 1 of heat exchanger 2
First circulating line 51 is attached, by the second circulating line between circulation fluid outlet 21 and the loop head 102 of flash tank 1
52 are attached；And wherein, it is ensured that the pressure in heat exchanger 2 is higher than the pressure in flash tank 1, and the position of heat exchanger 2
Set low in the position of flash tank 1.
Circulating pump 3 is arranged on the first circulating line 51 connecting heat exchanger 2 and flash tank 1, and Main Function is to provide
The circulation power of desulfurization wastewater.Additionally, the first circulating line 51 part between circulating pump 3 and flash tank 1 is provided with main useless
Water inlet 511, desulfurization wastewater is inputted by main waterwater entrance 511.
The Main Function of two-stage Mechanical Vapor Compression 4 is to provide a system to energy.Enter as it is shown in figure 1, it has steam
Mouth 41 and steam (vapor) outlet 42, steam inlet 41 connects the steam outlet 103 of flash tank 1, steam by the first jet chimney 61
Outlet 42 connects the steam inlet 23 of heat exchanger 2 by the second jet chimney 62.Produced by flash distillation, indirect steam is from steam
Floss hole 103 out enters compressor 4, after indirect steam obtains energy by the two stages of compression of compressor 4, enters heat exchanger
2 carry out heat exchange, and the condensed fluid of generation is discharged by condensation-water drain 24 and can reuse.
The flow process that crystallization apparatus of the present utility model carries out desulfurization wastewater process is as follows:
(1), after desulfurization wastewater enters the first circulating line 51 by main waterwater entrance 511, follow under circulating pump 3 acts on
Ring arrives heat exchanger 2；
(2), after the desulfurization wastewater in heat exchanger 2 is heated to superheat state, in entering flash tank 1, carry out flash distillation；Flash distillation
Produced indirect steam enters Mechanical Vapor Compression 4, Mechanical Vapor Compression 4 do work it, improves the temperature of waste water
And pressure；
(3) waste water continues cycling through evaporation, until separating out crystal salt in flash tank 1, crystal salt can enter in salt lower limb 11, quilt
The waste water sprayed into by waterwater entrance 111 is cleaned, and by magma outlet 112 discharge under waste water effect.
Hereafter, carrying out processed to by the crystal salt grain of magma outlet 112 discharge, the crystal salt grain after process seals
Dress, filtrate is then back to flash tank 1 and continues to concentrate.
By above procedure, desulfurization wastewater is separated into two parts: a part is condensed fluid, and the water quality of this condensed fluid is very
Height, close to desalted water water quality, can carry out reuse；Another part is solid crystal salt grain, if crystal salt purity is higher, then may be used
Reclaim again.Thus, the zero-emission of desulfurization wastewater can be realized.
Although this utility model is disclosed above with preferred embodiment, but it is not limited to the model that this utility model is implemented
Enclose.Any those of ordinary skill in the art, without departing from invention scope of the present utility model, when making a little improvement,
The most every equal improvement done according to this utility model, should be scope of the present utility model and is contained.
Claims (9)
1. the crystallization apparatus being used for realizing desulfurization wastewater zero-emission, it is characterised in that including:
Flash tank, including tank body and the salt lower limb being arranged on described tank base；Wherein, described tank body is provided with loop exit,
Loop head, steam outlet, described salt lower limb is provided with waterwater entrance and is positioned at the magma outlet below described waterwater entrance；
Heat exchanger, has circulation fluid entrance, circulation fluid outlet, steam inlet and condensation-water drain；Wherein, described circulation fluid
Entrance is attached by the loop exit of the first circulating line with described flash tank, and the outlet of described circulation fluid is by the second circulation
Pipeline is attached with the loop head of described flash tank；
Circulating pump, is arranged on described first circulating line；
Two-stage Mechanical Vapor Compression, has steam inlet and steam (vapor) outlet；Wherein, the first steam pipe is passed through in described steam inlet
Road connects the steam outlet of described flash tank, and described steam (vapor) outlet connects the steaming of described heat exchanger by the second jet chimney
Vapour entrance.
2. crystallization apparatus as claimed in claim 1, it is characterised in that: described heat exchanger be arranged on described flash tank just under
Side or obliquely downward.
3. crystallization apparatus as claimed in claim 1, it is characterised in that: described steam outlet is arranged on described tank body top.
4. crystallization apparatus as claimed in claim 1, it is characterised in that: described loop head is positioned on described loop exit.
5. crystallization apparatus as claimed in claim 1, it is characterised in that: the quantity of described waterwater entrance is at least two.
6. crystallization apparatus as claimed in claim 1, it is characterised in that: in described waterwater entrance is constructed so that described salt lower limb
Waste water produces eddy flow.
7. crystallization apparatus as claimed in claim 1, it is characterised in that: the top of described tank inner chamber is provided with demister.
8. crystallization apparatus as claimed in claim 7, it is characterised in that: described demister is double-deck demister, under being positioned at
The deflection plate of layer and the silk screen being positioned at upper strata.
9. crystallization apparatus as claimed in claim 1, it is characterised in that: it is provided with main waste water on described first circulating line and enters
Mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553945.0U CN205773469U (en) | 2016-06-08 | 2016-06-08 | A kind of crystallization apparatus for realizing desulfurization wastewater zero-emission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553945.0U CN205773469U (en) | 2016-06-08 | 2016-06-08 | A kind of crystallization apparatus for realizing desulfurization wastewater zero-emission |
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| CN205773469U true CN205773469U (en) | 2016-12-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314119A (en) * | 2017-01-17 | 2018-07-24 | 中国电力工程顾问集团华东电力设计院有限公司 | Desulfurization wastewater phase transformation flash crystallization Zero discharging system and method for treating desulfurized wastewater |
| CN110028121A (en) * | 2019-05-10 | 2019-07-19 | 成都三顶环保科技有限公司 | Desulfurization wastewater treatment system |
-
2016
- 2016-06-08 CN CN201620553945.0U patent/CN205773469U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314119A (en) * | 2017-01-17 | 2018-07-24 | 中国电力工程顾问集团华东电力设计院有限公司 | Desulfurization wastewater phase transformation flash crystallization Zero discharging system and method for treating desulfurized wastewater |
| CN110028121A (en) * | 2019-05-10 | 2019-07-19 | 成都三顶环保科技有限公司 | Desulfurization wastewater treatment system |
| CN110028121B (en) * | 2019-05-10 | 2021-10-22 | 成都三顶环保科技有限公司 | Desulfurization wastewater treatment system |
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