CN216418925U - Device for treating limestone wet desulphurization slurry poisoning - Google Patents
Device for treating limestone wet desulphurization slurry poisoning Download PDFInfo
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- CN216418925U CN216418925U CN202122977902.9U CN202122977902U CN216418925U CN 216418925 U CN216418925 U CN 216418925U CN 202122977902 U CN202122977902 U CN 202122977902U CN 216418925 U CN216418925 U CN 216418925U
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Abstract
The utility model relates to a administer device that limestone wet flue gas desulfurization thick liquid was poisoned, including gypsum whirl station, vacuum belt hydroextractor, gypsum whirl station, vacuum belt hydroextractor pass through the cooling conveying pipe and connect, and the liquid outlet and the vacuum belt hydroextractor of cooling conveying pipe are connected, and the cooling conveying pipe sets up the cooling intermediate layer, lets in the cooling intermediate layer cooling medium. The gypsum dewatering device has the advantages that cracks are not easy to form in the process of dewatering after entering the vacuum belt dewatering device, a better dewatering effect can be achieved, the moisture content of the separated gypsum is about 10%, and the gypsum dewatering device is convenient to transport and recycle.
Description
Technical Field
The utility model belongs to the technical field of wet flue gas desulfurization, concretely relates to administer poisoned device of lime stone wet flue gas desulfurization thick liquid.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Limestone (lime) -gypsum wet desulphurization is the most widely applied desulphurization technology for flue gas treatment of industrial boilers at present. SO in flue gas2The gas is absorbed by limestone (lime) slurry sprayed in countercurrent to produce a series of chemical reactions to produce CaSO4At a certain concentration and temperature, CaSO4Form crystal nuclei with water and then grow into gypsum crystals. After the gypsum slurry is discharged, the gypsum slurry is dewatered in two stages, finally, a gypsum finished product with the water content of less than 10 percent is produced, and the gypsum finished product is recycled after transportation and processing. However, in actual operation, the desulfurization slurry is often "poisoned" due to the influence of factors such as temperature, smoke, metal ions, organic molecules and the like. Once the gypsum slurry is poisoned, the main symptoms are that the desulfurization efficiency is reduced, the consumption of the desulfurizing agent is increased, the slurry density in the absorption tower is increased, and the like. Stone (A. B. C. A. stoneWhen the paste liquid is dehydrated through the vacuum belt conveyor, filter cakes on filter cloth are easy to crack, so that the normal vacuum degree of a vacuum box of the belt conveyor cannot be maintained, normal dehydration cannot be finished, gypsum is separated to form a sludge shape, transportation is difficult, and secondary pollution is caused.
The main method for treating the difficulty in dehydrating the gypsum slurry at present is slurry replacement, the replaced slurry with problems is stored in other places, and new slurry is supplemented into the system. Slurry displacement is mainly carried out in the following two ways: firstly, load reduction and displacement are carried out simultaneously; and secondly, emptying the absorption tower for replacement after the operation is stopped. However, the slurry displaced by the two methods needs to be temporarily stored in an accident slurry box or a factory wastewater pool for subsequent additional treatment. The slurry temporary storage needs large space, large workload, long replacement period, higher cost, influences production load, and is easy to cause secondary pollution to the surrounding environment.
SUMMERY OF THE UTILITY MODEL
To the problems existing in the prior art, the utility model aims to provide a device for treating limestone wet desulphurization slurry poisoning.
In order to solve the technical problem, the technical scheme of the utility model is that:
the utility model provides a administer device that limestone wet flue gas desulfurization thick liquid was poisoned, includes gypsum whirl station, cooling conveying pipeline, vacuum belt hydroextractor, and gypsum whirl station, vacuum belt hydroextractor pass through the cooling conveying pipeline and connect, and the liquid outlet and the vacuum belt hydroextractor of cooling conveying pipeline are connected, and the cooling conveying pipeline sets up the cooling intermediate layer, lets in cooling medium in the cooling intermediate layer.
The gypsum cyclone station is the primary dewatering equipment of gypsum slurry in limestone wet desulphurization engineering. Absorbing sulfur dioxide in the flue gas by limestone slurry, and oxidizing to obtain CaSO4，CaSO4Crystallization in water to produce CaSO4·2H2And O, after the slurry reaches a certain density, conveying the slurry to a gypsum cyclone by a gypsum discharge pump, concentrating and grading particles, returning overflow with lower concentration to an absorption tower, and conveying underflow to a vacuum belt dehydrator for continuous dehydration (secondary dehydration). However, the gypsum is crystallized due to the overhigh temperature of the flue gas at the inlet of the absorption towerThe time is short, the gypsum crystal is small, and substances such as smoke dust, metal ions, organic molecules and the like contained in the flue gas are easy to wrap a desulfurizing agent and part of free water in the desulfurization reaction, so that the generation and crystal growth of gypsum are influenced, sufficient oxidation is insufficient, and the like, so that the proportion of calcium sulfite and unreacted calcium carbonate in the gypsum slurry is increased, and the hydrophilicity of the slurry is enhanced. When the part of slurry enters a vacuum belt dehydrator for dehydration, a filter cake formed is easy to crack, the crack can cause the vacuum degree leakage of a vacuum box of the belt conveyor, the dehydration cannot be normally carried out, the dehydrated gypsum becomes a slurry, the transportation is difficult, and the secondary pollution is easily caused due to improper treatment.
The utility model discloses in set up cooling transfer pipe way in gypsum whirl station and vacuum belt hydroextractor, the underflow gypsum thick liquid of whirl station is cooled off rapidly at the in-process of carrying, the temperature reduces to about 45 ℃ from 60 ℃, make the hydrophilicity of solid particle reduce under the effect of temperature drop, the effect that the free moisture that is wrapped up receives the shrinkage is expelled, thereby make the thick liquid that gets into vacuum belt hydroextractor be difficult to appear cracked when forming the filter cake, can maintain the higher vacuum of belt feeder vacuum box, reach better dehydration effect, realize the quick replacement of poisoning thick liquid.
The utility model discloses one or more technical scheme has following beneficial effect:
the utility model discloses in set up cooling transfer pipe way in gypsum whirl station and vacuum belt hydroextractor, whirl station underflow thick liquid is cooled off rapidly at the in-process of carrying, make the hydrophilicity of solid particle reduce under the effect of temperature drop, the effect that the free moisture that is wrapped up receives the shrinkage is discharged and is extruded, thereby make the thick liquid that gets into vacuum belt hydroextractor be difficult to appear cracked when forming the filter cake, can maintain the higher vacuum of belt feeder vacuum box, reach better dehydration, deviate from the gypsum moisture content and be about 10%, be convenient for transport and recycle. The slurry of the absorption tower can be quickly replaced through continuous dehydration operation, and the normal operation can be quickly recovered.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the invention and not to limit the invention unduly.
FIG. 1 is a diagram of an apparatus for treating limestone wet desulfurization slurry poisoning;
the system comprises a gypsum swirling station 1, a gypsum swirling station 2, an underflow box 3, an overflow pipeline 4, a swirling rotor 5, an absorption tower slurry discharge pipeline 6, a cooling conveying pipeline 7, a vacuum belt dehydrator 8, a cooling medium guide pipeline 9, a cooling medium guide pipeline 10, a manual ball valve 11, a water flow indicator 12 and a pressure gauge.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The utility model provides a administer device that limestone wet flue gas desulfurization thick liquid was poisoned, includes gypsum whirl station 1, cooling conveying pipeline 6, vacuum belt hydroextractor 7, and gypsum whirl station 1, vacuum belt hydroextractor 7 are connected through cooling conveying pipeline 6, and cooling conveying pipeline 6's liquid outlet is connected with vacuum belt hydroextractor 7, and cooling conveying pipeline 6 sets up the cooling intermediate layer, lets in cooling medium in the cooling intermediate layer, through the cold water shortage flow of 10 aperture control of manual ball valve.
As shown in fig. 1, the absorption tower effluent 5 enters a gypsum swirling station, swirls, and then enters a vacuum belt dehydrator 7 through a cooling transfer pipe 6 to be dehydrated. At the in-process through cooling conveying pipeline 6, liquid is cooled off, makes the hydrophilicity of solid particle reduce under the effect of temperature drop, and the free moisture that is wrapped up receives the effect of shrinkage and is expelled to make the thick liquid that gets into vacuum belt hydroextractor be difficult to appear cracked when forming the filter cake, can maintain the higher vacuum of belt feeder vacuum box, reach better dehydration effect.
As a further technical scheme, the gypsum rotational flow station 1 comprises an overflow box, a liquid inlet box and an underflow box 2, wherein the liquid inlet box is provided with a liquid inlet, the overflow box is arranged at the top of the liquid inlet box, and the liquid inlet box is connected with the underflow box 2. The liquid discharged from the absorption tower enters the liquid inlet box and then enters the overflow box, and forms underflow and overflow through the process of overflow, wherein the overflow enters the overflow box, and the underflow enters the underflow box 2.
As a further technical scheme, a connecting pipeline of the liquid inlet tank and the underflow tank 2 is provided with a cyclone 4. The swirlers 4 swirl the liquid.
As a further technical scheme, the overflow tank is provided with an overflow port which is connected with an overflow pipeline 3. The overflowed liquid enters a subsequent filtrate water tank.
As a further technical scheme, the device also comprises a cooling medium introducing pipeline 9, wherein a cooling medium introducing pipeline 8 is connected with a cooling medium inlet of a cooling interlayer of the cooling conveying pipeline 6, a cooling medium outlet of the cooling conveying pipeline 6 is positioned at one side close to the gypsum swirling station 1, and a cooling medium inlet of the cooling conveying pipeline 6 is positioned at one side close to the vacuum belt dehydrator 7. The cooling medium introduction pipe 9 is used for inputting a cooling medium such as cooling water or the like.
As a further technical solution, the cooling system further comprises a cooling medium outlet pipeline 8, and the cooling medium outlet pipeline 9 is connected with a cooling medium outlet of the cooling conveying pipeline 6.
Cooling medium such as cooling water can enter from a cooling medium inlet on the side of the cooling conveying pipeline close to the vacuum belt dehydrator 7 and then be discharged from a cooling medium outlet on the side close to the gypsum swirling station 1, so that the gas in a cooling interlayer of the cooling conveying pipeline can be discharged conveniently, and the cooling quality is improved.
The cooling medium introducing pipe is provided with a water flow indicator 11, a pressure gauge 12 and a manual ball valve 10. A manual ball valve 10 is arranged on the cooling medium outlet pipe 8.
As a further technical scheme, the length of the cooling conveying pipeline 6 is 3.5-4.5 m; and may be 4 m. The length of the cooling transfer duct 6 affects the progress of the cold shrinkage of the solid particles inside the duct. The granules are shrunk as far as possible, and the vacuum dehydration effect is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a administer device that limestone wet flue gas desulfurization thick liquid is poisoned which characterized in that: the gypsum rotational flow station and the vacuum belt dehydrator are connected through a cooling conveying pipeline, a liquid outlet of the cooling conveying pipeline is connected with the vacuum belt dehydrator, the cooling conveying pipeline is provided with a cooling interlayer, and a cooling medium is introduced into the cooling interlayer.
2. The apparatus for treating the poisoning of limestone wet desulphurization slurry according to claim 1, wherein: the gypsum rotational flow station comprises an overflow box, a liquid inlet box and a bottom flow box, wherein the liquid inlet box is provided with a liquid inlet, the overflow box is arranged at the top of the liquid inlet box, and the liquid inlet box is connected with the bottom flow box.
3. The apparatus for treating the poisoning of limestone wet desulphurization slurry according to claim 2, wherein: and a connecting pipeline of the liquid inlet box and the bottom flow box is provided with a cyclone.
4. The apparatus for treating the poisoning of limestone wet desulphurization slurry according to claim 2, wherein: the overflow tank is provided with an overflow port, and the overflow port is connected with an overflow pipeline.
5. The apparatus for treating the poisoning of limestone wet desulphurization slurry according to claim 1, wherein: the gypsum dewatering device is characterized by further comprising a cooling medium leading-in pipeline, the cooling medium leading-in pipeline is connected with a cooling medium inlet of a cooling interlayer of the cooling conveying pipeline, a cooling medium outlet of the cooling conveying pipeline is located on one side close to the gypsum cyclone station, and a cooling medium inlet of the cooling conveying pipeline is located on one side close to the vacuum belt dewatering machine.
6. The apparatus for treating the poisoning of limestone wet desulphurization slurry according to claim 5, wherein: the cooling medium guiding pipeline is connected with a cooling medium outlet of the cooling conveying pipeline.
7. The apparatus for treating the poisoning of limestone wet desulphurization slurry according to claim 1, wherein: the length of the cooling conveying pipeline is 3.5-4.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122977902.9U CN216418925U (en) | 2021-11-30 | 2021-11-30 | Device for treating limestone wet desulphurization slurry poisoning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122977902.9U CN216418925U (en) | 2021-11-30 | 2021-11-30 | Device for treating limestone wet desulphurization slurry poisoning |
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| CN216418925U true CN216418925U (en) | 2022-05-03 |
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| CN202122977902.9U Active CN216418925U (en) | 2021-11-30 | 2021-11-30 | Device for treating limestone wet desulphurization slurry poisoning |
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