CN218521119U - System for purifying coal gasification grey water - Google Patents
System for purifying coal gasification grey water Download PDFInfo
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- CN218521119U CN218521119U CN202223019756.XU CN202223019756U CN218521119U CN 218521119 U CN218521119 U CN 218521119U CN 202223019756 U CN202223019756 U CN 202223019756U CN 218521119 U CN218521119 U CN 218521119U
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Abstract
The utility model provides a system for purify coal gasification buck relates to waste water treatment technical field. Comprises a feeding unit, a physical dehydration unit and an electrochemical reaction unit which are communicated in sequence. The physical dehydration unit comprises a filter pressing piece, a heating piece and a blending burning area, the heating piece and the filter pressing piece are arranged at intervals, a squeezing cavity is formed between the heating piece and the filter pressing piece, and the blending burning area and the squeezing cavity are correspondingly arranged at intervals so as to collect filter residues in the squeezing cavity; the inlet of the filter pressing piece is respectively connected with the feeding unit and the compressed air pipeline through feeding pipelines, and the outlet of the filter pressing piece is respectively and selectively connected with the electrochemical reaction unit and the vacuum pipeline. The coal gasification slurry can be subjected to solid-liquid separation by arranging the physical dehydration unit, the filter cake is further dewatered by adopting a vacuum pipeline and a compressed air pipeline, the water content in the filter cake and the solid content in the filtrate are reduced, and a better solid-liquid separation effect is achieved.
Description
Technical Field
The utility model relates to a waste water treatment technical field particularly, relates to a system for purifying coal gasification grey water.
Background
The coal chemical industry is a leading technology for clean utilization of coal in China, and the industrial scale rapidly increases with a composite growth rate of 25-30% every year. Along with the rapid development of the novel coal chemical industry in China, the emission of gasified grey water is increased day by day, so that the sustainable development of the coal chemical industry can be promoted only by effectively reducing carbon from the source and reducing carbon in the process. Because the coal gasification slurry is finally changed into high-pressure and high-temperature water, the requirements on the quality of grey water are high in the environment of high temperature, high pressure, high hardness, high alkalinity, high suspended solid and easy scaling. The water system with a good coal gasification resistance device is an important link for ensuring the stable operation of the gasification furnace, the ash water solid suspension is one of important indexes influencing the stable operation of the water system, and the scaling effect of the ash water system is directly influenced by the content of the ash water solid suspension. The existence of the solid suspension can not only induce the formation of calcium carbonate scale, but also adsorb the scale inhibition and dispersion agent, thereby reducing the activity of the scale inhibition and dispersion agent, increasing the consumption of medicaments and increasing the deposition probability of the solid suspension in pipelines and equipment.
The existing coal gasification slurry treatment mainly depends on chemical sedimentation, i.e. solid matters are precipitated by adding a flocculating agent for separation, but the use of chemical agents is increased, the discharge amount of the ash water is increased, and meanwhile, the index control of suspended matters in the coal gasification slurry is unstable, so that a system for purifying the coal gasification ash water is urgently needed to solve any one of the problems.
In view of this, the utility model is especially provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a system for purifying coal gasification buck, it can become filtrating and filter residue with the separation of coal gasification slurry, when reducing filter residue moisture content, reduces the solid rate that contains of filtrating.
The embodiment of the utility model is realized like this:
in a first aspect, the present invention provides a system for purifying coal gasification grey water, comprising a feeding unit, a physical dehydration unit and an electrochemical reaction unit, which are sequentially connected, wherein the electrochemical reaction unit comprises an electrochemical reactor.
The physical dehydration unit comprises a filter pressing piece, a heating piece and a blending burning area, wherein the heating piece and the filter pressing piece are arranged at intervals, a pressing cavity is formed between the heating piece and the filter pressing piece, and the blending burning area and the pressing cavity are correspondingly arranged at intervals so as to collect filter residues in the pressing cavity; the inlet of the filter press is connected with the feeding unit and the compressed air pipeline through feeding pipes respectively, and the outlet of the filter press is selectively connected with the electrochemical reactor and the vacuum pipeline respectively.
The utility model discloses a set up the physics dehydration unit and can carry out solid-liquid separation with coal gasification slurry, further adopt vacuum line and compressed air line to carry out the dewatering to the filter cake, reduced the moisture content in the filter cake to reduce the cost of filter cake follow-up processing technology, the solid rate that contains in the filtrating also reduces simultaneously. The utility model discloses a share physics dehydration unit and electrochemical reaction unit, electrochemical reactor further separates a small amount of suspended solid in the filtrating from liquid for the moisture content of filter cake and the solid content of filtrating all reduce, reach the solid-liquid separation effect of preferred. Meanwhile, the electrochemical reactor can also improve the concentration multiple of the filtrate, and save water and energy.
In an alternative embodiment, the connection of the inlet of the filter press with the feed unit and the compressed air line, respectively, by means of a feed conduit comprises the provision of a valve on the feed conduit to control the connection of the filter press with the feed unit or the compressed air line.
Preferably, the valve is a three-way valve, and it is also possible to provide a valve in the line connected to the feed unit and a valve in the line connected to the compressed air line.
In an alternative embodiment, the selective connection of the outlet of the filter press to the electrochemical reactor and to the vacuum line, respectively, comprises the communication of the vacuum line with the outlet of the filter press when the vacuum line is active and the communication of the outlet of the filter press with the electrochemical reactor when the vacuum line is inactive. Therefore, the filtrate filtered out from the filter press can directly flow into the electrochemical reactor through the outlet of the filter press for reaction.
In an alternative embodiment, the system further comprises a recycling unit, wherein the recycling unit comprises a pit, and the pit is communicated with the electrochemical reactor and used for collecting the electrochemically treated grey water.
The pit is connected with a first recycling pipeline, the feeding unit comprises a gasified slurry storage tank, and the gasified slurry storage tank is communicated with the filter pressing piece; the first recycling pipeline is connected with the gasified slurry storage tank.
In an alternative embodiment, the electrochemical reactor is further provided with an interface for connecting with a gasification system. The interface of the electrochemical reactor connected with the gasification system is higher than the interface of the electrochemical reactor connected with the first recycling pipeline.
After the filtrate is treated in the electrochemical reactor, as the easily-scaling substances grow precipitates on the electrodes, the filtrate in the electrochemical reactor is discharged to a gasification system, the residual solid dirt liquid in the electrochemical reactor is discharged into a pit, the dirt liquid is discharged into a gasification slurry storage tank through a first recycling pipeline in the pit, and the material in the gasification slurry storage tank can be diluted; meanwhile, the solid suspended matters in the dirt liquid can be further introduced into the filter-pressing piece for solid-liquid separation.
In an alternative embodiment, a filtrate pump is installed on a pipeline connecting the electrochemical reactor and the gasification system, and is used for pumping the filtrate into the gasification system.
In an alternative embodiment, a pit pump is also provided on the first return line for pumping the grey water and precipitated dirt from the pit into the gasification slurry storage tank.
In an alternative embodiment, the device further comprises a control element, wherein the control element is used for controlling the distance between the heating element and the filter pressing element, so that a pressing cavity is formed between the heating element and the filter pressing element when the heating element and the filter pressing element are closed, and when the heating element and the filter pressing element are separated, the filter cake enters the blending and burning zone for subsequent treatment.
In an alternative embodiment, the filter press member is a membrane filter press plate and the control element is a cylinder in the membrane filter press.
In an optional embodiment, the number of the heating elements and the filter pressing elements is more than or equal to 2, the filter pressing elements and the heating elements are alternately arranged, and each heating element and an adjacent filter pressing element form a pressing cavity.
Every heating member all is provided with the import, and the import of heating member and filter-pressing member's import intercommunication.
In an alternative embodiment, each heating element is provided with an outlet, and the outlet of the heating element communicates with the outlet of the press filter.
In an optional embodiment, the number of the outlets of the heating element is equal to that of the outlets of the filter pressing element, and the number of the outlets of the filter pressing element is at least 4, and the outlets are evenly distributed around the filter pressing element at intervals.
In an alternative embodiment, the top of the electrochemical reactor is further provided with a scraper, which is selectively in contact with the electrodes in the electrochemical reactor for scraping off deposits on the surfaces of the electrodes.
It is understood that, in the process of discharging the filtrate, the electrochemical reactor may discharge the filtrate to the gasification system before scraping the electrode, or may discharge the filtrate to the gasification system after the electrode is scraped after the liquid is left for a period of time.
In an alternative embodiment, a feeding pump is further arranged on a pipeline connecting the feeding unit and the physical dehydration unit.
Preferably, the feed pump is located on the conduit connecting the grey water buffer tank to the filter press.
The embodiment of the utility model provides a beneficial effect is:
the utility model discloses a set up the physics dehydration unit and can carry out solid-liquid separation with coal slurry, further adopt vacuum line and compressed air line to carry out the dewatering to the filter cake, reduced the moisture content in the filter cake to reduce the cost of filter cake subsequent processing technology, the solid rate that contains in the filtrating also reduces simultaneously. The utility model discloses a share physics dehydration unit and electrochemical reaction unit, electrochemical reactor further separates a small amount of suspended solid in the filtrating from liquid for the moisture content of filter cake and the solid content of filtrating all reduce, reach the solid-liquid separation effect of preferred. Meanwhile, the electrochemical reactor can also improve the concentration multiple of the filtrate, and save water and energy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a system for purifying coal gasification grey water according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of a filter press according to a first embodiment of the present invention;
fig. 3 is a cross-sectional view of the center position of the physical dehydration unit in a filter-pressing state according to the first embodiment of the present invention;
FIG. 4 is a cross-sectional view of the center of the physical dehydration unit in the slagging state according to the first embodiment of the present invention.
100-System for purifying coal gasification Grey Water; 110-gasified slurry storage tank; 120-a physical dewatering unit; 121-a filter press; 1211-inlet to the filter press; 1212-outlet of the filter press; 122-a heating element; 123-a pressing cavity; 130-an electrochemical reactor; 141-pit; 142-a first return conduit; 200-doped burning zone.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
First embodiment
Referring to fig. 1, the present embodiment provides a system 100 for purifying coal gasification grey water, which includes a feeding unit, a physical dehydration unit 120, and an electrochemical reaction unit, which includes an electrochemical reactor 130, connected in sequence.
The feed unit comprises a gasification sludge storage tank 110, from which gasification sludge to be treated flows into a physical dewatering unit 120.
The physical dewatering unit 120 comprises a press filter 121, a heating element 122, an adulteration area and a control element, wherein the control element is used for controlling the distance between the heating element 122 and the press filter 121, so that a pressing cavity 123 is formed between the heating element 122 and the press filter 121 when the heating element 122 and the press filter 121 are closed, and when the heating element 122 and the press filter 121 are separated, the filter cake enters the adulteration area for subsequent treatment.
In this embodiment, the filter press member 121 is a membrane filter press plate and the control element is a cylinder in the membrane filter press.
The number of the heating members 122 and the filter pressing members 121 is multiple, the filter pressing members 121 and the heating members 122 are alternately arranged at intervals, each heating member 122 and one adjacent filter pressing member 121 form a pressing cavity 123, and the blending combustion area and the pressing cavity 123 are correspondingly arranged at intervals to collect filter residues in the pressing cavity 123.
As shown in fig. 2, the inlet 1211 of the filter pressing member is located at the center of the filter pressing member 121, the inlet of the heating member 122 is located at the center of the heating member 122, and the inlet of the heating member 122 is communicated with the inlet 1211 of the filter pressing member, so that the grey water can sequentially pass through the inlet 1211 of each filter pressing member and the inlet 1211 of each heating member 122, a large amount of grey water can be simultaneously filtered in the plurality of pressing chambers 123, and the grey water treatment efficiency is improved.
The export 1212 of filter-pressing piece is 4, is located four angles of filter-pressing piece 121 respectively, and the export of heating member 122 also is four, is located four angles of heating member 122 respectively, and four exports of heating member 122 all communicate with four exports of filter-pressing piece 121.
The inlet 1211 of the filter element is connected to the gasified slurry tank 110 and a compressed air line via feed lines, respectively, wherein a valve is provided in the pipe connecting the gasified slurry tank 110 to the feed line for controlling the supply of grey water, and a valve is provided in the pipe connecting the compressed air line to the feed line for controlling the purge of compressed air.
The outlet 1212 of the filter press may be selectively connected to a vacuum line. When the vacuum line is not in operation, the outlet 1212 of the filter press is not in communication with the vacuum line and filtrate can exit the physical dewatering unit 120 through the outlet 1212 of the filter press and enter the electrochemical reactor 130 through a conduit. When the vacuum pipeline works, the outlet 1212 of the filter-pressing piece is communicated with the vacuum pipeline for vacuumizing treatment.
As shown in fig. 1, the recycling unit comprises a pit 141, the pit 141 being in communication with the electrochemical reactor 130 for collecting electrochemically treated grey water.
The pit 141 is connected to a first recycling pipe 142, the first recycling pipe 142 is connected to the gasified slurry storage tank 110, and the dirt liquid at the bottom of the pit 141 is pumped back to the gasified slurry storage tank 110, so that the material in the gasified slurry storage tank 110 is diluted and then directly enters the physical dehydration unit 120, and the solid and the liquid are separated.
In this embodiment, to facilitate pumping out the suspended solids from the bottom of the pit 141, a pit pump is also provided in the first return line 142 for pumping the ash-containing water and settled dirt from the pit 141 into the gasification slurry storage tank 110.
In this embodiment, a filtrate pump is installed on a pipeline connecting the electrochemical reactor 130 and the gasification system, and is used for pumping the filtrate into the gasification system.
In this embodiment, the top of the electrochemical reactor is further provided with a scraper which is selectively contacted with the electrodes in the electrochemical reactor for scraping off the deposits on the surfaces of the electrodes.
The operating principle of the system 100 for purifying coal gasification grey water according to this embodiment is as follows:
the vacuum line is kept disconnected from the outlet 1212 of the filter press and the oil cylinder is adjusted to close the gap between the filter press 121 and the heating element 122, forming the pressing chamber 123, as shown in figure 3. The coal gasification slurry flows out of the gasification slurry storage tank 110, then enters from an inlet 1211 of the filter pressing piece and sequentially enters each pressing cavity 123, the coal gasification slurry is filtered in the pressing cavity 123 through the filter pressing piece 121, filter residues are stored in the pressing cavity 123, and the filter liquor flows out of an outlet 1212 of the filter pressing piece and enters the electrochemical reactor 130; closing a valve for feeding the coal gasification slurry, opening a valve for communicating an inlet 1211 of the filter pressing piece with a compressed air interface, introducing compressed air into the filter pressing piece 121, and allowing the compressed air to drive the moisture in the filter residue to flow out of an outlet 1212 of the filter pressing piece again to enter the electrochemical reactor 130; and closing a valve for feeding compressed air, connecting an outlet 1212 of the filter pressing element with a vacuum pipeline, vacuumizing the filter cake, and reducing the water content in the filter cake for the third time. In order to reduce the water content of the filter cake, the operations of compressed air blowing and/or vacuum suction can be repeated, and when the water content of the filter cake is qualified, all feeding valves are closed and the vacuum pipeline is disconnected. As shown in figure 4, the oil cylinder is adjusted to separate the filter pressing member 121 from the heating member 122, and the filter cake falls into the co-combustion zone from the gap between the heating member 122 and the filter pressing member 121, and then enters the co-combustion zone 200 for treatment. After the reaction of the filtrate in the electrochemical reactor 130 is completed, the electrode is lifted and passes through the scale scraper, solid matters growing on the electrode are scraped into the solution, the solution is kept still for a period of time, the liquid is discharged into the gasification system, the dirt liquid at the bottom is discharged into the pit 141, and then the dirt liquid is pumped into the gasification slurry storage tank 110 through the pit pump, so that the hardness of the gasification grey water feed is reduced.
The embodiment of the utility model provides a system 100 for purifying coal gasification grey water, it has following advantage at least:
1. the coal gasification slurry can be subjected to solid-liquid separation by the physical dehydration unit 120, and the filter cake is further subjected to water removal by a vacuum pipeline and a compressed air pipeline, so that the water content in the filter cake is reduced, the cost of the subsequent treatment process of the filter cake is reduced, and the solid content in the filtrate is also reduced. The utility model discloses a share physical dehydration unit 120 and electrochemical reactor 130, electrochemical reactor 130 further separates a small amount of suspended solid in the filtrating from liquid for the moisture content of filter cake and the solid content of filtrating all reduce, reach the solid-liquid separation effect of preferred. Meanwhile, the electrochemical reactor 130 can also improve the concentration multiple of the filtrate, save water and energy.
2. After the filtrate is treated in the electrochemical reactor, as the easily-scaling substances grow precipitates on the electrodes, the filtrate in the electrochemical reactor is discharged to a gasification system, the residual solid fouling liquid in the electrochemical reactor is discharged to a pit, and the fouling liquid is discharged to the gasification slurry storage tank 110 in the pit 141 through a first recycling pipeline 142, so that the materials in the gasification slurry storage tank 110 can be diluted, and the hardness of the original materials is reduced; meanwhile, the solid suspended matter in the dirt liquid can be further introduced into the filter-pressing member 121 for solid-liquid separation.
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 (10)
1. The system for purifying the coal gasification grey water is characterized by comprising a feeding unit, a physical dehydration unit and an electrochemical reaction unit which are sequentially communicated, wherein the electrochemical reaction unit comprises an electrochemical reactor;
the physical dehydration unit comprises a filter pressing piece, a heating piece and an intermingling burning area, wherein the heating piece and the filter pressing piece are arranged at intervals, a pressing cavity is formed between the heating piece and the filter pressing piece, and the intermingling burning area and the pressing cavity are arranged at corresponding intervals to collect filter residues in the pressing cavity; the inlet of the filter press is respectively connected with the feeding unit and the compressed air pipeline through feeding pipelines, and the outlet of the filter press is respectively and selectively connected with the electrochemical reactor and the vacuum pipeline.
2. The system of claim 1, further comprising a recycling unit comprising a pit in communication with the electrochemical reaction unit for collecting electrochemically treated grey water;
the pit is connected with a first recycling pipeline, the feeding unit comprises a gasified slurry storage tank, and the gasified slurry storage tank is communicated with the filter pressing piece; the first recycling pipeline is connected with the gasified slurry storage tank.
3. The system of claim 2, wherein the electrochemical reactor is further provided with an interface connected with a gasification system;
the interface of the electrochemical reactor connected with the gasification system is higher than the interface of the electrochemical reactor connected with the first recycling pipeline.
4. The system of claim 3, wherein a filtrate pump is installed on a pipe connecting the electrochemical reactor and the gasification system.
5. The system of claim 2, wherein the first return conduit is further provided with a pit pump for pumping grey water and sediment from the pit into the gasification sludge storage tank.
6. The system as claimed in claim 1, wherein the number of the heating elements and the number of the filter pressing elements are both more than or equal to 2, the filter pressing elements and the heating elements are alternately arranged, each heating element is provided with an inlet, and the inlets of the heating elements are communicated with the inlets of the filter pressing elements.
7. A system according to claim 6, wherein each of the heating elements is provided with an outlet and the outlet of the heating element communicates with the outlet of the press.
8. The system of claim 7, wherein the number of outlets of the heating element is equal to the number of outlets of the filter pressing element, and the number of outlets of the filter pressing element is at least 4 and the outlets are evenly distributed around the filter pressing element at intervals.
9. The system of claim 1, wherein the top of the electrochemical reaction unit further comprises a scraper selectively contactable with the electrodes in the electrochemical reaction unit for scraping off deposits on the surfaces of the electrodes.
10. The system of claim 1, wherein the feeding pump is further arranged on the pipeline connecting the feeding unit and the physical dewatering unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223019756.XU CN218521119U (en) | 2022-11-14 | 2022-11-14 | System for purifying coal gasification grey water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223019756.XU CN218521119U (en) | 2022-11-14 | 2022-11-14 | System for purifying coal gasification grey water |
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| Publication Number | Publication Date |
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| CN218521119U true CN218521119U (en) | 2023-02-24 |
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| CN202223019756.XU Active CN218521119U (en) | 2022-11-14 | 2022-11-14 | System for purifying coal gasification grey water |
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