CN209957585U - Evaporation and concentration device for fly ash washing liquid - Google Patents
Evaporation and concentration device for fly ash washing liquid Download PDFInfo
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- CN209957585U CN209957585U CN201920759972.7U CN201920759972U CN209957585U CN 209957585 U CN209957585 U CN 209957585U CN 201920759972 U CN201920759972 U CN 201920759972U CN 209957585 U CN209957585 U CN 209957585U
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Abstract
The utility model discloses an evaporative concentration device of flying dust washing liquid, including an effect falling film evaporation ware, two effect falling film evaporation wares, three effect falling film evaporation wares and crystal separation ware, an effect falling film evaporation ware, two effect falling film evaporation wares, three effect falling film evaporation wares connect gradually, three effect falling film evaporation wares's feed line is connected with three effect falling film evaporation wares's feed inlet and crystal separation ware feed inlet respectively, the mother liquor export of crystal separation ware passes through the feed inlet of tube coupling three effect falling film evaporation wares, the crystal export of crystal separation ware passes through tube coupling centrifuge, the solid export of centrifuge passes through the tube coupling crystallization storage tank, the liquid export of centrifuge passes through the feed line of tube coupling three effect falling film evaporation wares. The utility model discloses can prevent that the material from circulating under the supersaturation, avoid causing falling film evaporator to block up to the separation of potassium and sodium in the follow-up salt of being convenient for.
Description
Technical Field
The utility model relates to a flying dust handles technical field, in particular to flying dust washing liquid's evaporation concentration device.
Background
Fly ash is a fine particulate matter collected in flue gas purification systems, including fly ash produced when flue gas is treated with chemical agents, and accounts for about 10% to 20% of ash. The fly ash is generally grey white or dark grey, the particle size is less than 300 mu m, most of the fly ash is 1.0 to 30 mu m, the water content is 10 to 23 percent, the heat ignition loss is 34 to 51 percent, the fly ash is easy to frost heaving and difficult to compact, and the particle shape is mostly rod-shaped, polygonal, cotton flocculent, spherical and other irregular shapes. Meanwhile, the incineration fly ash contains harmful substances such as dioxin, heavy metals and the like, and is regulated according to the pollution control Standard for incineration of domestic waste (GB 18485-2014): the household garbage incineration fly ash is managed according to dangerous waste. Therefore, the fly ash must be collected separately, and must not be mixed with household garbage, incineration residue, etc., and other hazardous wastes.
The fly ash contains high-concentration chloride salt, and the existence of the chloride salt can seriously limit the harmless treatment and resource utilization of the fly ash. In order to remove chloride in fly ash and meet the requirement of cooperative disposal of a cement kiln, a multi-stage countercurrent washing mode is usually adopted, for example, three-stage countercurrent washing is adopted, a large amount of washing liquid is generated after washing, the washing liquid enters an evaporation crystallization step, salt and distilled water are recovered after evaporation crystallization, a multi-effect falling film evaporation device is usually adopted for evaporation crystallization, and the problems exist: when salt is evaporated in the last effective falling film evaporator, the salt can be discharged only in a saturated state, the saturated liquid after the salt discharge is continuously circulated, and the feed liquid is in a supersaturated state, so that large-scale blockage of salt crystallization in a pipeline of the falling film evaporator is easily caused, the operation cannot be realized, and the pipeline dredging of the falling film evaporator is difficult and high in cost.
Disclosure of Invention
The utility model aims to solve the problem that the existing multiple-effect falling film evaporation device circulates under the supersaturation of materials and the pipeline is easy to block, and provides an evaporation concentration device for fly ash washing liquid.
The utility model provides a technical scheme that its technical problem adopted is:
an evaporation concentration device for fly ash washing liquid comprises a first-effect falling-film evaporator, a second-effect falling-film evaporator, a third-effect falling-film evaporator and a crystallization separator, wherein the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are sequentially connected, a feeding pipeline of the third-effect falling-film evaporator is respectively connected with a feeding port of the third-effect falling-film evaporator and a feeding port of the crystallization separator, a mother liquid outlet of the crystallization separator is connected with a feeding port of the third-effect falling-film evaporator through a pipeline, a crystal outlet of the crystallization separator is connected with a centrifugal machine through a pipeline, a solid outlet of the centrifugal machine is connected with a crystallization storage tank through a pipeline, and.
According to the conventional arrangement, crystals are directly discharged after the triple-effect falling-film evaporator is saturated, the crystal discharge amount is small in the circulation state, a large amount of salt-containing saturated liquid can still enter the circulation again, the circulated material can reach the supersaturation state along with the circulation, and the crystals are rapidly crystallized in the inner pipeline of the falling-film evaporator at a certain moment, so that blockage is formed; meanwhile, the salt separated in the supersaturated state is supersaturated, so that potassium chloride and sodium chloride in the salt are crystallized simultaneously, and the subsequent potassium-sodium separation is difficult. The utility model discloses a set up a crystal separation ware behind triple effect falling film evaporator, when the material reaches the saturated condition that can go out the brilliant, will be sent to and carry out the crystallization separation in the crystal separation ware, the crystallization separates more easily like this, the separation effect is better, a small amount of mother liquor after the separation flows back to triple effect falling film evaporator's feed inlet and unsaturated material mixture, thereby maintain the material and not continuously move under the oversaturated condition, effectively avoid the jam problem, simultaneously because not moving under the oversaturated condition, basically all be sodium chloride in the crystallization, the potassium-sodium separation is easier, the crystallization of isolating passes through centrifugal separation, the crystal gets into the crystallization storage tank, and liquid reentries the feed line who gets into triple effect falling film evaporator and retreats.
Preferably, material conveying pumps are arranged on the feeding pipelines of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator, and the feeding pipelines of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively composed of a pipeline before a pump and a pipeline after the pump.
Preferably, the discharge pipeline of the one-effect falling-film evaporator is respectively connected with the pipeline in front of the pump of the feeding pipeline of the one-effect falling-film evaporator and the pipeline in front of the pump of the feeding pipeline of the two-effect falling-film evaporator.
Preferably, the discharge pipeline of the two-effect falling-film evaporator is respectively connected with the pipeline in front of the pump of the feeding pipeline of the two-effect falling-film evaporator and the pipeline in front of the pump of the feeding pipeline of the three-effect falling-film evaporator.
Preferably, the discharge pipeline of the three-effect falling-film evaporator is connected with the pre-pump pipeline of the feed pipeline of the three-effect falling-film evaporator.
Preferably, the liquid outlet of the centrifugal machine is connected with the pre-pump pipeline of the feeding pipeline of the triple-effect falling-film evaporator through a pipeline.
Preferably, a post-pump pipeline of the feeding pipeline of the three-effect falling-film evaporator is respectively connected with a feeding hole of the three-effect falling-film evaporator and a feeding hole of the crystallization separator.
Preferably, a valve for controlling the material to be conveyed to the feed inlet of the three-effect falling-film evaporator or the feed inlet of the crystallization separator is arranged on the feed pipeline of the three-effect falling-film evaporator.
Preferably, the upper parts of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively provided with a steam inlet, the tops of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively provided with a steam outlet, the steam outlet of the first-effect falling-film evaporator is connected with the steam inlet of the second-effect falling-film evaporator through a pipeline, the steam outlet of the second-effect falling-film evaporator is connected with the steam inlet of the third-effect falling-film evaporator through a pipeline, the steam outlet of the third-effect falling-film evaporator is connected with an evacuation pipeline, and a steam jet compressor is arranged on a connecting.
The utility model has the advantages that: can prevent the material from circulating under supersaturation, avoid causing the falling film evaporator to block up to can be convenient for the separation of potassium sodium in the follow-up salt.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the system comprises a first-effect falling-film evaporator, 2, a second-effect falling-film evaporator, 3, a third-effect falling-film evaporator, 4, a crystallization separator, 41, a crystallization separator feeding hole, 42, a mother liquor outlet, 43, a crystal outlet, 5, a centrifugal machine, 6, a crystallization storage tank, 7, a material conveying pump, 8, a pre-pump pipeline, 9, a post-pump pipeline, 10, a discharging pipeline, 11, a steam inlet, 12, a steam outlet, 13 and a steam jet compressor.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific embodiments and with reference to the accompanying drawings.
Example (b):
the evaporation concentration device of the fly ash water washing liquid shown in figure 1 comprises a first-effect falling-film evaporator 1, a second-effect falling-film evaporator 2, a third-effect falling-film evaporator 3 and a crystallization separator 4 which are connected in sequence, material conveying pumps 7 are arranged on feed pipelines of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator, and feed pipelines of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are composed of a pipeline 8 before a pump and a pipeline 9 after the pump. The left sides of the upper parts of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively provided with a steam inlet 11, the right sides of the upper parts of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively provided with a feed inlet, the tops of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively provided with a steam outlet 12, the steam outlet of the first-effect falling-film evaporator is connected with an inlet of a steam jet compressor 13 through a pipeline, an outlet of the steam jet compressor 13 is connected with the steam inlet of the second-effect falling-film evaporator through a pipeline, the steam outlet of the second-effect falling-film evaporator is connected with the.
The discharge pipeline 10 of the first-effect falling-film evaporator is respectively connected with the pipeline in front of the pump of the feeding pipeline of the first-effect falling-film evaporator and the pipeline in front of the pump of the feeding pipeline of the second-effect falling-film evaporator. And the discharge pipeline of the two-effect falling-film evaporator is respectively connected with the pipeline in front of the pump of the feeding pipeline of the two-effect falling-film evaporator and the pipeline in front of the pump of the feeding pipeline of the three-effect falling-film evaporator. The discharge pipeline of the triple-effect falling-film evaporator is connected with the front pump pipeline of the feed pipeline of the triple-effect falling-film evaporator. And a valve for controlling the material to be conveyed to the feed inlet of the three-effect falling-film evaporator or the feed inlet of the crystallization separator is arranged on a pump rear pipeline of the feed pipeline of the three-effect falling-film evaporator.
The connection structure of the triple-effect falling-film evaporator and the crystallization separator is as follows: and a pump rear pipeline of the feeding pipeline of the three-effect falling-film evaporator is respectively connected with a feeding hole of the three-effect falling-film evaporator and a feeding hole 41 of the crystallization separator. A mother liquor outlet 42 of the crystallization separator is connected with a feed inlet of the three-effect falling-film evaporator through a pipeline, a crystal outlet 43 of the crystallization separator is connected with the centrifuge 5 through a pipeline, a solid outlet of the centrifuge is connected with the crystallization storage tank 6 through a pipeline, and a liquid outlet of the centrifuge is connected with a pump front pipeline of a feed pipeline of the three-effect falling-film evaporator through a pipeline.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.
Claims (9)
1. An evaporation concentration device of fly ash water washing liquid is characterized in that: the device comprises a first-effect falling-film evaporator, a second-effect falling-film evaporator, a third-effect falling-film evaporator and a crystallization separator, wherein the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are sequentially connected, a feeding pipeline of the third-effect falling-film evaporator is respectively connected with a feeding port of the third-effect falling-film evaporator and a feeding port of the crystallization separator, a mother liquor outlet of the crystallization separator is connected with the feeding port of the third-effect falling-film evaporator through a pipeline, a crystal outlet of the crystallization separator is connected with a centrifugal machine through a pipeline, a solid outlet of the centrifugal machine is connected with a crystallization storage tank through a.
2. The evaporative concentration apparatus for a fly ash water scrubbing liquid as claimed in claim 1, wherein: the feed pipelines of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively provided with a material conveying pump, and the feed pipelines of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively composed of a pipeline before the pump and a pipeline after the pump.
3. The evaporative concentration apparatus for a fly ash water scrubbing liquid as claimed in claim 2, wherein: the discharge pipeline of the first-effect falling-film evaporator is respectively connected with the pipeline in front of the pump of the feeding pipeline of the first-effect falling-film evaporator and the pipeline in front of the pump of the feeding pipeline of the second-effect falling-film evaporator.
4. The evaporative concentration apparatus for a fly ash water scrubbing liquid as claimed in claim 2, wherein: and the discharge pipeline of the two-effect falling-film evaporator is respectively connected with the pipeline in front of the pump of the feeding pipeline of the two-effect falling-film evaporator and the pipeline in front of the pump of the feeding pipeline of the three-effect falling-film evaporator.
5. The evaporative concentration apparatus for a fly ash water scrubbing liquid as claimed in claim 2, wherein: the discharge pipeline of the triple-effect falling-film evaporator is connected with the front pump pipeline of the feed pipeline of the triple-effect falling-film evaporator.
6. The evaporative concentration apparatus for a fly ash water scrubbing liquid as claimed in claim 2, wherein: the liquid outlet of the centrifugal machine is connected with the pump front pipeline of the feeding pipeline of the triple-effect falling-film evaporator through a pipeline.
7. The evaporative concentration apparatus for a fly ash water scrubbing liquid as claimed in claim 2, wherein: and a pump rear pipeline of the feeding pipeline of the three-effect falling-film evaporator is respectively connected with a feeding hole of the three-effect falling-film evaporator and a feeding hole of the crystallization separator.
8. The evaporative concentration apparatus for a fly ash water scrubbing liquid as claimed in claim 1, wherein: and a valve for controlling the material to be conveyed to the feed inlet of the three-effect falling-film evaporator or the feed inlet of the crystallization separator is arranged on the feed pipeline of the three-effect falling-film evaporator.
9. The evaporative concentration apparatus for a fly ash water scrubbing liquid as claimed in claim 1, wherein: the upper parts of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively provided with a steam inlet, the tops of the first-effect falling-film evaporator, the second-effect falling-film evaporator and the third-effect falling-film evaporator are respectively provided with a steam outlet, the steam outlet of the first-effect falling-film evaporator is connected with the steam inlet of the second-effect falling-film evaporator through a pipeline, the steam outlet of the second-effect falling-film evaporator is connected with the steam inlet of the third-effect falling-film evaporator through a pipeline, the steam outlet of the third-effect falling-film evaporator is connected with an evacuation pipeline, and a steam jet compressor is arranged on a.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920759972.7U CN209957585U (en) | 2019-05-24 | 2019-05-24 | Evaporation and concentration device for fly ash washing liquid |
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| CN201920759972.7U CN209957585U (en) | 2019-05-24 | 2019-05-24 | Evaporation and concentration device for fly ash washing liquid |
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| CN209957585U true CN209957585U (en) | 2020-01-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380060A (en) * | 2020-03-21 | 2020-07-07 | 深圳市海文环保技术有限公司 | Chemical waste salt harmless treatment system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380060A (en) * | 2020-03-21 | 2020-07-07 | 深圳市海文环保技术有限公司 | Chemical waste salt harmless treatment system and method |
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