CN114181743A - Coke oven gas purification device - Google Patents
Coke oven gas purification device Download PDFInfo
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- CN114181743A CN114181743A CN202111302244.1A CN202111302244A CN114181743A CN 114181743 A CN114181743 A CN 114181743A CN 202111302244 A CN202111302244 A CN 202111302244A CN 114181743 A CN114181743 A CN 114181743A
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- mother liquor
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/506—Sulfuric acid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention relates to a coal gas purification treatment technology and discloses a coke oven coal gas purification device. The coke oven gas purification device comprises a saturator, a preprocessor for heating gas to be processed, a full flow groove, a mother liquor storage tank and an acid remover, wherein a crystallization chamber is arranged at the lower part of the saturator, a saturator gas outlet communicated with the acid remover is arranged at the top of the saturator, a saturator gas inlet and a mother liquor inlet are arranged on the side wall of the saturator, a mother liquor outlet is arranged on the side wall of the crystallization chamber, the mother liquor inlet and the mother liquor outlet are respectively communicated with the mother liquor storage tank, a full flow output mechanism communicated with the full flow groove is arranged in the saturator, the bottom of the full flow groove is communicated with the mother liquor storage tank, and a full flow groove gas inlet and a full flow groove gas outlet communicated with the preprocessor are arranged on the side wall of the full flow groove. The device can effectively reduce condensate and mother liquor residue in the pipeline, improves the treatment efficiency to coking gas, and the security is high.
Description
Technical Field
The invention relates to a coal gas purification treatment technology, in particular to a coke oven gas purification device.
Background
In the field of coal chemical industry, a saturator of an ammonium sulfate section of a chemical workshop of a coke-oven plant is mainly used for treating the ammonia content in coal gas sent from a previous section, and then sending the qualified coal gas to a crude benzene section. The method is characterized in that a spray saturator is generally adopted to produce ammonium sulfate, coke oven gas heated by a preheater enters a spray chamber at the upper section of the spray saturator in the process of producing ammonium sulfate, the gas is fully contacted with circulating mother liquor in the spray chamber at the upper section, the sulfuric acid in the circulating mother liquor fully absorbs ammonia in the gas and produces ammonium sulfate through chemical reaction, the mother liquor at the upper part of a crystallization chamber at the lower section of the saturator is pumped to the spray chamber at the upper section through the mother liquor circulating pump and sprayed to the spray chamber at the upper section of the crystallization chamber to absorb ammonia in the gas, and meanwhile, the mother liquor is continuously stirred to improve the crystallization process of the ammonium sulfate.
The saturator is usually provided with a full flow groove, mother liquor flowing out from the spray chamber flows into the full flow groove, working personnel need to take the mother liquor from the groove at regular time to test the acid concentration in the mother liquor and also need to fish acid tar formed in the mother liquor, and the mother liquor in the full flow groove contains sulfuric acid, so that the safety of the personnel is greatly threatened; in addition, the liquid level of the ammonium sulfate mother liquor is not required to be static without stopping, which brings difficulty to fishing tar, prolongs the time for manually fishing tar and causes harm to the health of personnel.
In the using process of the saturator, more condensate and mother liquor are remained in a pipeline connected with the saturator, and overflow is easy to occur during maintenance, so that the safety of personnel and the ground environment are affected; when the centrifuge on the mother liquor pipeline is in a shutdown state, the mother liquor in the saturator can form gas to overflow, and the overflowing gas is liquefied to corrode the centrifuge screen, so that the service life of the screen is influenced.
Disclosure of Invention
The invention aims to provide a coke oven gas purification device which can effectively reduce condensate and mother liquor residues in a pipeline, improve the treatment efficiency of coking gas and has high safety.
In order to achieve the purpose, the invention provides a coke oven gas purification device which comprises a saturator, a preprocessor for heating gas to be treated, a full flow tank, a mother liquor storage tank and an acid remover, wherein a crystallization chamber is arranged at the lower part of the saturator, a saturator gas outlet communicated with the acid remover is arranged at the top of the saturator, a saturator gas inlet and a mother liquor inlet are arranged on the side wall of the saturator, a mother liquor outlet is arranged on the side wall of the crystallization chamber, the mother liquor inlet and the mother liquor outlet are respectively communicated with the mother liquor storage tank, a full flow output mechanism communicated with the full flow tank is arranged in the saturator, the bottom of the full flow tank is communicated with the mother liquor storage tank, and a full flow tank gas inlet and a full flow tank gas outlet communicated with the preprocessor are arranged on the side wall of the full flow tank.
Preferably, a purging mechanism is arranged on a connecting pipeline between the saturator gas outlet and the acid remover and/or a connecting pipeline between the mother liquor outlet and the mother liquor storage tank.
Specifically, the purging mechanism comprises a purging pipeline with one end connected with a gas supply device, a purging check valve arranged on the purging pipeline and a purging ball valve arranged on the purging pipeline, and one end of the purging pipeline, which is far away from the gas supply device, is connected with a connecting pipeline between the saturator gas outlet and the acid remover (5) or connected with a connecting pipeline between the mother liquor outlet and the mother liquor storage tank; the purge ball valve is located between the purge check valve and the gas supply.
Preferably, a mother liquor pump is arranged on a connecting pipeline between the mother liquor storage tank and the mother liquor inlet, and a check valve in accordance with the flow direction of the mother liquor is arranged on a connecting pipeline between the mother liquor pump and the mother liquor inlet.
Preferably, the mother liquor storage tank is connected with an automatic dosing mechanism, and a densimeter electrically connected with the automatic dosing mechanism is arranged in the mother liquor storage tank.
More preferably, the top of saturator is provided with the air duct that from top to bottom extends, the top of air duct with the saturator coal gas inlet is connected, the bottom sets up to horn-shaped structure.
Specifically, the full-flow output mechanism comprises a floating pipe capable of floating on the liquid surface in the saturator, a hose and a full-flow groove inflow pipe connected with the full-flow groove, wherein one end of the hose is connected with the floating pipe, and the other end of the hose is connected with the full-flow groove inflow pipe.
More specifically, the side wall of the floating pipe is provided with at least one through hole.
Typically, the full flow groove comprises a closed full flow groove shell, an inner sleeve pipe, a flow distribution plate and a siphon pipe, wherein the inner sleeve pipe is positioned in the full flow groove shell, the top of the inner sleeve pipe is in an opening shape, the bottom of the inner sleeve pipe is installed on a bottom plate of the full flow groove shell, the top of the flow distribution plate is connected with the inner side wall of the full flow groove shell, an opening is formed between the bottom of the flow distribution plate and the bottom plate of the full flow groove shell, so that a liquid discharge cavity is formed between the flow distribution plate and the full flow groove shell, one end of the siphon pipe extends into the liquid discharge cavity, the other end of the siphon pipe is connected with the mother liquid storage tank, and the inflow pipe of the full flow groove extends into the inner sleeve pipe.
More typically, the bottom edge of the flow distribution plate is lower than the bottom edge of one end of the siphon tube extending into the liquid discharge cavity, a slag discharge port is arranged on the side wall of the full-flow-groove shell, and the bottom edge of the slag discharge port is higher than the bottom edge of one end of the siphon tube extending into the liquid discharge cavity.
According to the technical scheme, the full-flow groove and the saturator are arranged in a separated mode, the full-flow groove is effectively matched with the preprocessor and the mother liquor storage tank, so that coal gas to be processed is contacted with acid full-flow liquid in the full-flow groove to form neutralization to a certain degree before being heated by the preprocessor, the processing efficiency of the coal gas to be processed can be improved, and acid tar in the full-flow groove can be recycled; full-flow liquid containing acid tar in the saturator is directly input into the full-flow tank through the full-flow output mechanism, so that the contact between operating personnel and the acid tar is reduced, and the operation safety is effectively improved; the full-flow tank not only can effectively separate acid tar in full-flow liquid, but also can reflux clean mother liquor separated from the full-flow liquid into the mother liquor storage tank for cyclic utilization, so that the utilization efficiency of the mother liquor is further improved, and the treatment cost of coke oven gas is saved.
In the preferred embodiment of the invention, a purging mechanism is arranged on a connecting pipeline between a gas outlet of a saturator and an acid remover and/or a connecting pipeline between a mother liquor outlet and a mother liquor storage tank so as to reduce condensate and mother liquor residues in the pipelines and avoid the influence of overflow on personnel safety and ground environment during maintenance; the full flow output mechanism can utilize the cooperation of the floating pipe and the hose to continuously absorb acid tar on the surface of the liquid when the liquid level in the saturator changes, and the acid tar is input into the closed full flow groove through the full flow groove inflow pipe so as to automatically fish the acid tar and improve the safety of the purification process.
Further advantages of the present invention, as well as the technical effects of preferred embodiments, are further described in the following detailed description.
Drawings
FIG. 1 is a schematic structural view of one embodiment of a coke oven gas purification apparatus according to the present invention;
fig. 2 is a schematic structural view of an embodiment of the full flow cell of fig. 1.
Description of the reference numerals
1 saturator 11 saturator gas inlet
12 saturator gas outlet 13 mother liquor inlet
14 mother liquor outlet and 15 saturator outlet
16 full flow output mechanism 161 floating pipe
162 hose 163 full sink inflow
17 air duct 18 crystallization chamber
2 pretreater 3 full flow groove
31 full flow groove gas inlet and 32 full flow groove gas outlet
33 inner sleeve 34 splitter plate
35 siphon 36 liquid discharge cavity
37 slag discharging port 4 mother liquor storage tank
5 deacidification ware 6 sweeps mechanism
61 purge check valve 62 purge ball valve
7 one-way valve 8 mother liquor pump
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description is provided for purposes of illustration and explanation and is not intended to limit the scope of the invention.
In the description of the present invention, it should be explained that some orientation words, such as "inner", "outer", "upper", "lower", "top", "bottom", etc., referred to in the following description for clearly explaining the technical solution of the present invention, have meanings by analogy with the orientation that a corresponding device is placed in a horizontal plane, for example, in case of the saturator 1, when the saturator 1 is placed horizontally, "upper", "top" refers to an end where the top of the saturator 1 is located, "lower", "bottom" refers to a position where the bottom of the saturator 1 is located, "inner" refers to the inside of the saturator 1, and "outer" refers to the outside of the saturator 1.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "communicate" and "connect" are to be interpreted broadly, e.g., as a fixed connection, a removable connection, or an integral connection; the connection may be direct or indirect through an intermediate medium, and may be a communication between the two structural members or an interaction relationship between the two structural members. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a coke oven gas purification device, which is shown in figure 1 and comprises a saturator 1, a preprocessor 2 for heating gas to be treated, a full-flow tank 3, a mother liquor storage tank 4 and an acid remover 5, wherein the lower part of the saturator 1 is provided with a crystallization chamber 18, the top of the saturator 1 is provided with a saturator gas outlet 12 communicated with the acid remover 5, the side wall of the saturator 1 is provided with a saturator gas inlet 11 and a mother liquor inlet 13, the side wall of the crystallization chamber 18 is provided with a mother liquor outlet 14, the mother liquor inlet 13 and the mother liquor outlet 14 are respectively communicated with the mother liquor storage tank 4, the saturator 1 is internally provided with a full-flow output mechanism 16 communicated with the full-flow tank 3, the bottom of the full-flow tank 3 is communicated with the mother liquor storage tank 4, and the side wall of the full-flow tank 3 is provided with a full-flow tank gas inlet 31 and a full-flow tank gas outlet 32 communicated with the preprocessor 2.
In the invention, the preprocessor 2, the mother liquor storage tank 4 and the deacidification device 5 can adopt the conventional equipment and treatment process which can be applied to the purification of the coke oven gas in the field.
It should be noted that the connection relationship among the saturator 1, the preprocessor 2, the full-flow tank 3, the mother liquor storage tank 4 and the acid remover 5 in the present invention is realized by a suitable connection pipeline, each connection pipeline can be provided with a liquid pump or an air pump capable of providing a conveying power for corresponding liquid or gas according to requirements, and the adopted liquid pump or air pump is a conventional pumping device in the art and is installed on the corresponding connection pipeline in a conventional installation manner without special description; the bottom of the crystallization chamber 18 is provided with a saturator discharge port 15, and a full-flow groove gas inlet 31 and a full-flow groove gas outlet 32 are arranged at the upper part of the side wall of the full-flow groove 3, so that the separation of acid tar in the full-flow groove 3 is not influenced.
The coke oven gas purification device provided by the basic technical scheme performs the coke oven gas purification process as follows: the coke oven gas firstly enters the full-flow groove 3 from a full-flow groove gas inlet 31, enters the preprocessor 2 from a full-flow groove gas outlet 32 for preheating after being contacted and neutralized with full-flow liquid in the full-flow groove 3, then enters the saturator 1 through a saturator gas inlet 11, enters the acid remover 5 from a saturator gas outlet 12 after being contacted and reacted with mother liquid in the saturator 1, and finally enters the next step after being treated by the acid remover 5; in the process of treating coke oven gas, mother liquor in a mother liquor storage tank 4 is input into a saturator 1 from a mother liquor inlet 13, full-flow liquid containing acid tar in the saturator 1 is input into a full-flow tank 3 by a full-flow output mechanism 16, the acid tar and the mother liquor in the full-flow liquid are effectively separated in the full-flow tank 3, the separated clean mother liquor is refluxed into the mother liquor storage tank 4 for recycling, the saturator 1 is operated for a period of time, the mother liquor in the saturator is input into a crystallization chamber 18 for crystallization, the mother liquor at the upper part of the crystallization chamber 18 is input into the mother liquor storage tank 4 from a mother liquor outlet 14 for recycling, and the crystals are collected from a saturator outlet 15.
According to the coke oven gas purification device provided by the invention, the full-flow groove 3 is separated from the saturator 1, and the full-flow groove 3 is effectively matched with the preprocessor 2 and the mother liquor storage tank 4, so that the gas to be treated is contacted with the acid full-flow liquid in the full-flow groove 3 to form neutralization to a certain degree before being heated by the preprocessor, the treatment efficiency of the gas to be treated can be improved, and the acid tar in the full-flow groove 3 can be more favorably recycled; full flow liquid containing acid tar in the saturator 1 is directly input into the full flow tank 3 through the full flow output mechanism 16, so that the contact between operators and the acid tar is reduced, and the operation safety is effectively improved; the full-flow tank 3 not only can effectively separate acid tar in full-flow liquid, but also can reflux clean mother liquor separated from the full-flow liquid into the mother liquor storage tank 4 for cyclic utilization, so that the utilization efficiency of the mother liquor is further improved, and the treatment cost of coke oven gas is saved.
In a preferred embodiment of the coke oven gas purification apparatus of the present invention, a purging mechanism 6 is provided on a connection line between the saturator gas outlet 12 and the acid remover 5 and/or on a connection line between the mother liquor outlet 14 and the mother liquor storage tank 4. In the coke oven gas purification process, the residual of condensate and mother liquor often appears in the connecting pipeline between saturator gas outlet 12 and deacidification device 5 or the connecting pipeline between mother liquor outlet 14 and mother liquor storage tank 4, overflow easily occurs during maintenance, through the setting of purging mechanism 6, can effectively get rid of residual condensate and mother liquor in the corresponding connecting pipeline through the purging effect before the maintenance or after the purification treatment is finished, avoid causing the influence to personnel's safety and ground environment.
In the present invention, the purging mechanism 6 may be a conventional purging device or apparatus suitable for use in an acidic environment. As a preferred embodiment of the purging mechanism 6 in the present invention, the purging mechanism 6 comprises a purging pipeline with one end connected with the gas supply device, a purging check valve 61 positioned on the purging pipeline, and a purging ball valve 62 positioned on the purging pipeline, wherein one end of the purging pipeline far away from the gas supply device is connected with the connecting pipeline between the saturator gas outlet 12 and the acid remover 5, or connected with the connecting pipeline between the mother liquor outlet 14 and the mother liquor storage tank 4; a purge ball valve 62 is located between the purge check valve 61 and the gas supply. The purge check valve 61 and the purge ball valve 62 on the purge line are used in cooperation, when purging is needed, purge gas (such as nitrogen) in the gas supply device is sequentially input into the corresponding connecting line through the purge ball valve 62 and the purge check valve 61, and when purging is not needed, the purge check valve 61 can effectively prevent acid gas in the connecting line from entering the gas supply device, so that the gas supply device is prevented from being damaged.
As another preferred embodiment of the coke oven gas purification device, a mother liquor pump 8 is arranged on a connecting pipeline between the mother liquor storage tank 4 and the mother liquor inlet 13, and a check valve 7 which is consistent with the flow direction of the mother liquor is arranged on a connecting pipeline between the mother liquor pump 8 and the mother liquor inlet 13. Through the setting of check valve 7, can effectively avoid the acid gas in saturator 1 to cause the corruption to mother liquor pump 8.
In the present invention, the connection positions of the mother liquor inlet 13, the mother liquor outlet 14 and the mother liquor storage tank 4 are not particularly limited, and the bottom of the mother liquor storage tank 4 may be connected to the mother liquor inlet 13 through a connection pipeline, and the upper portion of the mother liquor storage tank may be connected to the mother liquor outlet 14 through a connection pipeline, so as to improve the utilization efficiency of the mother liquor in the mother liquor storage tank 4. In order to further improve the overall automation degree of the coke oven gas purification device, as a preferred embodiment of the mother liquor storage tank 4, the mother liquor storage tank 4 is connected with an automatic dosing mechanism, and a densimeter electrically connected with the automatic dosing mechanism is arranged in the mother liquor storage tank 4. The acid concentration in the mother liquor storage tank 4 is monitored by a densimeter, and when the density value is lower than the set concentration, the automatic dosing mechanism is opened, and fresh mother liquor is input into the mother liquor storage tank 4 or acid is supplemented. In the invention, the densimeter is not replaced by other monitors which can monitor the concentration of the mother liquor acid in the mother liquor storage tank 4, such as a pH meter, so as to ensure the purification effect of the mother liquor input into the saturator 1 from the mother liquor storage tank 4 on the coke oven gas in the saturator 1.
In the invention, the saturator gas inlet 11 can be arranged on the side wall or the top of the saturator 1, so that the coke oven gas can be input into the saturator 1 for effective purification treatment. As a preferred embodiment of the saturator 1 in the invention, the top of the saturator 1 is provided with a gas duct 17 extending from top to bottom, the top of the gas duct 17 is connected with the gas inlet 11 of the saturator, and the bottom of the gas duct 17 is provided with a horn-shaped structure. By arranging the gas guide pipe 17, the coke oven gas entering from the saturator gas inlet 11 can be guided to a position below the liquid level in the saturator 1, so that the coke oven gas is fully contacted with the mother liquor, the reaction rate of the coke oven gas and the mother liquor is accelerated, and the coke oven gas can be effectively prevented from directly entering the acid remover 5 from the saturator gas outlet 12.
In the invention, the full-flow output mechanism 16 can be provided with a corresponding overflow groove at a conventional fixed height on the inner wall of the saturator 1, so that the acid tar on the liquid surface in the saturator 1 enters the overflow groove in an overflow mode, and the full-flow output mechanism 16 extends into the overflow groove so as to input the full-flow liquid containing the acid tar in the overflow groove into the full-flow groove 3 for oil separation treatment. In a preferred embodiment of the full-flow discharge mechanism 16 of the present invention, the full-flow discharge mechanism 16 includes a float pipe 161 capable of floating on the liquid surface in the saturator 1, a hose 162, and a full-flow-tank inflow pipe 163 connected to the full-flow tank 3, and the hose 162 has one end connected to the float pipe 161 and the other end connected to the full-flow-tank inflow pipe 163. At this time, a corresponding liquid pump may be provided on the full flow tank inflow pipe 163 to pump the full flow liquid entering the float pipe 161 into the full flow tank 3; the floating pipe 161 can be made of acid-proof material with proper density, the depth of the floating pipe 161 extending into the liquid is controlled, and the hose 162 can float up and down along with the floating pipe 161, so that the floating pipe 161 can keep the liquid surface in the saturator 1, and the liquid height in the saturator 1 does not need to be controlled.
Preferably, at least one through hole is formed in the side wall of the floating pipe 161, so that the full flow liquid containing acid tar on the liquid surface in the saturator 1 can more conveniently enter the floating pipe 161, and the efficiency of conveying the full flow liquid by the full flow groove inflow pipe 163 is improved.
As a preferred embodiment of the full flow tank 3 in the present invention, referring to fig. 2, the full flow tank 3 includes a closed full flow tank shell, an inner sleeve 33 positioned in the full flow tank shell, a splitter plate 34 and a siphon 35, wherein the top of the inner sleeve 33 is open, the bottom of the inner sleeve 33 is mounted on the bottom plate of the full flow tank shell, the top of the splitter plate 34 is connected with the inner side wall of the full flow tank shell, an opening is formed between the bottom of the inner sleeve and the bottom plate of the full flow tank shell, so that a liquid discharge cavity 36 is formed between the splitter plate 34 and the full flow tank shell, one end of the siphon 35 extends into the liquid discharge cavity 36, the other end of the siphon is connected with the mother liquor storage tank 4, and the full flow tank inlet pipe 163 extends into the inner sleeve 33. The process of oil separation of the full flow groove 3 is as follows: full flow liquid containing acid tar flows into the inner sleeve 33 through the full flow groove inflow pipe 163 and then overflows from the top end of the inner sleeve 33 to enter the full flow groove shell, mother liquid and acid tar in the full flow liquid are separated in the full flow groove shell due to different densities, suspended matters such as acid tar and the like on the upper layer cannot enter the liquid discharge cavity 36 through the flow distribution plate 34 because the top of the flow distribution plate 34 is sealed, clean mother liquid on the lower layer can enter the liquid discharge cavity 36 from an opening at the bottom of the flow distribution plate 34, and then the clean mother liquid is input and flows into the mother liquid storage tank 4 by utilizing the siphon principle of the siphon 35, so that the cyclic utilization of the clean mother liquid is realized, and the purification cost of coke oven gas is reduced. In order to achieve better siphon effect of the siphon 35, it is preferable to dispose the mother liquor storage tank 4 below the overflow tank 3.
Preferably, the bottom edge of the diversion plate 34 is lower than the bottom edge of the end of the siphon 35 extending into the liquid discharge chamber 36, so as to improve the efficiency of conveying the cleaning mother liquid into the mother liquid storage tank 4 by using the siphon 35; be provided with row cinder notch 37 on the lateral wall of full launder casing, the bottom edge of row cinder notch 37 is higher than the one end bottom edge that siphon 35 stretched into in the flowing back chamber 36, and after siphon 35 carried clean mother liquor to mother liquor storage tank 4 completely, the position of full launder casing internal acid tar also reduced, utilizes row cinder notch 37 acid tar to discharge, realizes the effective collection to acid tar. It should be noted that, in order to ensure that the acid tar is completely discharged and does not enter the mother liquor storage tank 4 along with the mother liquor, a certain amount of mother liquor is left at the bottom of the full runner casing, and the top liquid level of the mother liquor is lower than the bottom edge of the slag discharge port 37 and higher than the bottom edge of the splitter plate 34.
According to a particularly preferred embodiment of the invention, the coke oven gas purification device comprises a saturator 1, a preprocessor 2 for heating gas to be processed, a full-flow tank 3, a mother liquor storage tank 4 and an acid remover 5, wherein the lower part of the saturator 1 is provided with a crystallization chamber 18, the top of the saturator 1 is provided with a saturator gas outlet 12 communicated with the acid remover 5, the side wall of the saturator 1 is provided with a mother liquor inlet 13, the side wall of the crystallization chamber 18 is provided with a mother liquor outlet 14, the bottom of the crystallization chamber 18 is provided with a saturator discharge hole 15, the mother liquor inlet 13 and the mother liquor outlet 14 are respectively communicated with the mother liquor storage tank 4, the saturator 1 is internally provided with a full-flow output mechanism 16 communicated with the full-flow tank 3, and the side wall of the full-flow tank 3 is provided with a full-flow tank gas inlet 31 and a full-flow tank gas outlet 32 communicated with the preprocessor 2; a connecting pipeline between the saturator gas outlet 12 and the deacidification device 5 and a connecting pipeline between the mother liquor outlet 14 and the mother liquor storage tank 4 are respectively provided with a purging mechanism 6, each purging mechanism 6 comprises a purging pipeline, a purging check valve 61 and a purging ball valve 62, one end of each purging pipeline is connected with the gas supply device, the purging check valve 61 is positioned on the purging pipeline, the purging ball valve 62 is positioned on the purging pipeline, one end, far away from the gas supply device, of each purging pipeline is connected with the corresponding connecting pipeline, and the purging ball valve 62 is positioned between the purging check valve 61 and the gas supply device; a mother liquor pump 8 is arranged on a connecting pipeline between a mother liquor storage tank 4 and a mother liquor inlet 13, a one-way valve 7 which is consistent with the flow direction of the mother liquor is arranged on the connecting pipeline between the mother liquor pump 8 and the mother liquor inlet 13, the mother liquor storage tank 4 is connected with an automatic dosing mechanism, a densimeter which is electrically connected with the automatic dosing mechanism is arranged in the mother liquor storage tank 4, an air duct 17 which extends from top to bottom is arranged at the top of the saturator 1, the top of the air duct 17 is connected with a saturator gas inlet 11, and the bottom of the air duct 17 is arranged to be of a horn-shaped structure; the full flow groove 3 comprises a closed full flow groove shell, an inner sleeve 33, a flow distribution plate 34 and a siphon 35, wherein the inner sleeve 33 is positioned in the full flow groove shell, the top of the inner sleeve 33 is in an opening shape, the bottom of the inner sleeve is arranged on the bottom plate of the full flow groove shell, the top of the flow distribution plate 34 is connected with the inner side wall of the full flow groove shell, an opening is formed between the bottom of the flow distribution plate 34 and the bottom plate of the full flow groove shell, so that a liquid discharge cavity 36 is formed between the flow distribution plate 34 and the full flow groove shell, one end of the siphon 35 extends into the liquid discharge cavity 36, and the other end of the siphon 35 is connected with the mother liquid storage tank 4; the full flow output mechanism 16 comprises a floating pipe 161 capable of floating on the liquid surface in the saturator 1, a hose 162 and a full flow groove inflow pipe 163 connected with the full flow groove 3, one end of the hose 162 is connected with the floating pipe 161, the other end of the hose 162 is connected with the full flow groove inflow pipe 163, one end of the full flow groove inflow pipe 163, which is far away from the hose 162, extends into the inner sleeve 33, at least one through hole is formed in the side wall of the floating pipe 161, the bottom edge of the diversion plate 34 is lower than the bottom edge of one end, extending into the liquid discharge cavity 36, of the siphon pipe 35, a slag discharge port 37 is formed in the side wall of the full flow groove shell, and the bottom edge of the slag discharge port 37 is higher than the bottom edge of one end, extending into the liquid discharge cavity 36, of the siphon pipe 35.
The coke oven gas purification device provided by the specific embodiment has the working process that: the coke oven gas firstly enters the full-flow groove 3 from a full-flow groove gas inlet 31, enters the preprocessor 2 from a full-flow groove gas outlet 32 for preheating after being contacted and neutralized with full-flow liquid in the full-flow groove 3, then enters the gas guide pipe 17 from a saturator gas inlet 11, is conveyed into mother liquid in the saturator 1 from a horn-shaped end part of the gas guide pipe 17, is subjected to full contact reaction with the mother liquid in the saturator 1, enters the acid remover 5 from a saturator gas outlet 12, and finally enters the next process after being treated by the acid remover 5;
in the process of treating coke oven gas, mother liquor in the mother liquor storage tank 4 is pumped by the mother liquor pump 8, so that the mother liquor is input into the saturator 1 from the mother liquor inlet 13; full-flow liquid containing acid tar in the saturator 1 flows into the floating pipe 161, and sequentially flows through the hose 162 and the full-flow tank inflow pipe 163 to be input into the inner sleeve 33 of the full-flow tank 3, and then overflows from the top end of the inner sleeve 33 to enter the full-flow tank shell, after mother liquid and the acid tar in the full-flow liquid are separated, suspended matters such as the acid tar and the like on the upper layer cannot enter the liquid discharge cavity 36 through the flow distribution plate 34, clean mother liquid on the lower layer enters the liquid discharge cavity 36 from an opening at the bottom of the flow distribution plate 34, and is input into the mother liquid storage tank 4 through the siphon 35 for recycling;
after the saturator 1 is operated for a period of time, the mother liquor in the saturator 1 is input into the crystallization chamber 18 for crystallization, the mother liquor on the upper part of the crystallization chamber 18 is input into the mother liquor storage tank 4 from the mother liquor outlet 14 for recycling, and the crystals are collected from the discharge hole 15 of the saturator;
after the coke oven gas is purified, the gas supply device is opened, so that the purging gas is sequentially input into the corresponding connecting pipeline through the purging ball valve 62 and the purging check valve 61, and the corresponding connecting pipeline is purged and cleaned.
Through the technical scheme, the full-flow groove 3 and the saturator 1 are arranged in a separating manner, and the full-flow groove 3, the preprocessor 2 and the mother liquor storage tank 4 are effectively matched, so that the coal gas to be treated is contacted with the acid full-flow liquid in the full-flow groove 3 to form neutralization to a certain degree before being heated by the preprocessor 2, the treatment efficiency of the coal gas to be treated can be improved, and the acid tar in the full-flow groove 3 can be recycled; full-flow liquid containing acid tar in the saturator 1 is directly input into the full-flow tank 3 through the full-flow output mechanism 16, so that the contact between operators and the acid tar is reduced, and the operation safety is effectively improved; the full-flow tank 3 not only can effectively separate acid tar in full-flow liquid, but also can reflux clean mother liquor separated from the full-flow liquid into the mother liquor storage tank 4 for cyclic utilization, so that the utilization efficiency of the mother liquor is further improved, and the treatment cost of coke oven gas is saved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition. In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The coke oven gas purification device is characterized by comprising a saturator (1), a preprocessor (2) for heating gas to be treated, a full flow groove (3), a mother liquor storage tank (4) and an acid remover (5), wherein a crystallization chamber (18) is arranged at the lower part of the saturator (1), a saturator gas outlet (12) communicated with the acid remover (5) is arranged at the top part of the saturator (1), a saturator gas inlet (11) and a mother liquor inlet (13) are arranged on the side wall of the saturator (1), a mother liquor outlet (14) is arranged on the side wall of the crystallization chamber (18), the mother liquor inlet (13) and the mother liquor outlet (14) are respectively communicated with the mother liquor storage tank (4), a full flow output mechanism (16) communicated with the full flow groove (3) is arranged in the saturator flow groove (1), and the bottom of the full flow groove (3) is communicated with the mother liquor storage tank (4), and a full-flow groove coal gas inlet (31) and a full-flow groove coal gas outlet (32) communicated with the preprocessor (2) are arranged on the side wall of the full-flow groove (3).
2. Coke oven gas purification device according to claim 1, characterized in that a purging mechanism (6) is provided on the connection line between the saturator gas outlet (12) and the deacidifier (5) and/or on the connection line between the mother liquor outlet (14) and the mother liquor storage tank (4).
3. Coke oven gas cleaning plant according to claim 2, characterized in that the purging mechanism (6) comprises a purging line with one end connected to a gas supply, a purging check valve (61) on the purging line and a purging ball valve (62) on the purging line, the end of the purging line remote from the gas supply being connected to the connecting line between the saturator gas outlet (12) and the deacidifier (5) or to the connecting line between the mother liquor outlet (14) and the mother liquor storage tank (4);
the purge ball valve (62) is located between the purge check valve (61) and the gas supply.
4. The coke oven gas purification device according to any one of claims 1 to 3, wherein a mother liquor pump (8) is arranged on a connecting pipeline between the mother liquor storage tank (4) and the mother liquor inlet (13), and a check valve (7) which is consistent with the flow direction of the mother liquor is arranged on a connecting pipeline between the mother liquor pump (8) and the mother liquor inlet (13).
5. The coke oven gas purification device according to any one of claims 1 to 3, wherein the mother liquor storage tank (4) is connected with an automatic dosing mechanism, and a densimeter electrically connected with the automatic dosing mechanism is arranged in the mother liquor storage tank (4).
6. The coke oven gas purification device according to any one of claims 1 to 3, wherein the top of the saturator (1) is provided with a gas guide tube (17) extending from top to bottom, the top of the gas guide tube (17) is connected with the saturator gas inlet (11), and the bottom of the gas guide tube is provided with a trumpet-shaped structure.
7. Coke oven gas cleaning plant according to any one of claims 1 to 3, characterized in that the full flow outlet mechanism (16) comprises a float pipe (161) which can float at the surface of the liquid in the saturator (1), a hose (162) and a full flow channel inlet pipe (163) connected to the full flow channel (3), the hose (162) being connected to the float pipe (161) at one end and to the full flow channel inlet pipe (163) at the other end.
8. Coke oven gas purification device according to claim 7, characterized in that at least one through hole is provided on the side wall of the floating pipe (161).
9. The coke oven gas cleaning device according to claim 7, characterized in that the full flow channel (3) comprises a closed full flow channel housing, an inner sleeve (33) positioned in the full flow channel housing, a splitter plate (34) and a siphon (35), wherein the top of the inner sleeve (33) is open, the bottom of the inner sleeve is mounted on the bottom plate of the full flow channel housing, the top of the splitter plate (34) is connected with the inner side wall of the full flow channel housing, an opening is formed between the bottom of the splitter plate and the bottom plate of the full flow channel housing, so that a liquid discharge cavity (36) is formed between the splitter plate (34) and the full flow channel housing, one end of the siphon (35) extends into the liquid discharge cavity (36), the other end of the siphon is connected with the mother liquid storage tank (4), and the full inflow pipe (163) extends into the inner sleeve (33).
10. The coke oven gas purification device according to claim 9, wherein the bottom edge of the flow distribution plate (34) is lower than the bottom edge of the siphon tube (35) at the end extending into the liquid discharge chamber (36), a slag discharge port (37) is arranged on the side wall of the full runner casing, and the bottom edge of the slag discharge port (37) is higher than the bottom edge of the siphon tube (35) at the end extending into the liquid discharge chamber (36).
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| CN114181743B (en) | 2023-04-18 |
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