阅读说明：本技术 一种硫铵满流槽酸焦油回收工艺及设备 (Process and equipment for recovering acid tar in ammonium sulfate full-flow tank ) 是由 杨雪松 于 2021-08-04 设计创作，主要内容包括：本发明涉及焦化行业煤气净化装置氨回收单元技术领域,尤其涉及一种硫铵满流槽酸焦油回收工艺及设备。包括饱和器、满流槽、母液贮槽、小母液循环管与酸焦油槽；满流槽的母液满流管插入满流槽底部,饱和器通过管道与满流槽相连,满流槽的酸焦油满流管线与酸焦油槽相连；酸焦油槽设有酸焦油入口接口、氮气接口、放散尾气接口、插入槽底部的酸焦油出口；小母液循环管一端与饱和器相连,另一端分别通过管道与母液贮槽、满流槽相连。能避免漂浮在硫铵液面的酸焦油随母液一起满流到母液贮槽污染母液,提高了产品质量。酸焦油实现了管道输送,利于环保；保障了作业人员的人身安全,降低了作业人员的劳动强度。(The invention relates to the technical field of ammonia recovery units of coal gas purification devices in the coking industry, in particular to a process and equipment for recovering acid tar in an ammonium sulfate full-flow groove. Comprises a saturator, a full flow groove, a mother liquor storage tank, a small mother liquor circulating pipe and an acid tar tank; the mother liquid full flow pipe of the full flow groove is inserted into the bottom of the full flow groove, the saturator is connected with the full flow groove through a pipeline, and the acid tar full flow pipe of the full flow groove is connected with the acid tar groove; the acid tar tank is provided with an acid tar inlet interface, a nitrogen interface, a tail gas diffusing interface and an acid tar outlet at the bottom of the insertion groove; one end of the small mother liquor circulating pipe is connected with the saturator, and the other end is respectively connected with the mother liquor storage tank and the full flow tank through pipelines. The acid tar floating on the ammonium sulfate liquid surface can be prevented from flowing into the mother liquid storage tank along with the mother liquid to pollute the mother liquid, and the product quality is improved. The acid tar realizes pipeline transportation and is beneficial to environmental protection; the personal safety of the operating personnel is guaranteed, and the labor intensity of the operating personnel is reduced.)

1. An ammonium sulfate full-flow tank acid tar recovery device is characterized by comprising a saturator, a full-flow tank, a mother liquor storage tank, a small mother liquor circulating pipe and an acid tar tank; the mother liquid full flow pipe of the full flow groove is inserted into the bottom of the full flow groove, the saturator is connected with the full flow groove through a pipeline, and the acid tar full flow pipe of the full flow groove is connected with the acid tar groove; the acid tar tank is provided with an acid tar inlet interface, a nitrogen interface, a tail gas diffusing interface and an acid tar outlet at the bottom of the insertion groove; one end of the small mother liquor circulating pipe is connected with the saturator, and the other end is respectively connected with the mother liquor storage tank and the full flow tank through pipelines.

2. The apparatus for recovering acid tar in ammonium sulfate full-flow tank according to claim 1, wherein the small mother liquor circulating pipe is provided with a small mother liquor circulating pump.

3. The apparatus for recovering acid tar in ammonium sulfate full flow tank according to claim 1, wherein the acid tar tank is provided with a pressure gauge and a level gauge.

4. The ammonium sulfate full-flow cell acid tar recovery apparatus according to claim 1, wherein the acid tar full-flow line is provided with a first valve; the acid tar outlet is connected with an acid tar conveying pipeline, and a second valve is arranged on the acid tar conveying pipeline.

5. The equipment for recovering acid tar in an ammonium sulfate full-flow tank according to claim 1, wherein the nitrogen interface is connected with a nitrogen pipeline, and a third valve is arranged on the nitrogen pipeline; the tail gas diffusing interface is connected with an acid tar tank tail gas pipeline, the acid tar tank tail gas pipeline is connected with a diffusing main pipe, and the acid tar tank tail gas pipeline is provided with a throttling orifice plate and a fourth valve.

6. The apparatus for recovering acid tar in ammonium sulfate full-flow trough according to claim 1, wherein a fifth valve is disposed on the mother liquor full-flow pipe.

7. The process of the equipment for recovering acid tar in the ammonium sulfate full-flow tank based on any one of claims 1 to 6 is characterized by comprising the following steps:

1) opening a fourth valve of an acid tar tank tail gas pipeline to enable the acid tar tank tail gas pipeline to be in a communicated state with a main discharge pipe, namely the acid tar tank is in a normal pressure state, opening a first valve on an acid tar full-flow pipeline, and enabling full-flow acid tar to flow out from an acid tar manual fishing-out port of the full-flow tank and enter an acid tar tank;

2) after the acid tar in the acid tar tank is accumulated to a set height, closing a first valve of an acid tar full-flow pipeline, closing a fourth valve of an acid tar tank tail gas pipeline, opening a second valve of an acid tar conveying pipeline, opening a third valve of a nitrogen pipeline, conveying the acid tar to a loading truck through a pipeline under the backpressure of nitrogen or directly conveying the acid tar to coal, and finishing the pipeline purging after the conveying is finished;

3) when the acid tar liquid level in the acid tar tank shows that the acid tar liquid level reaches a low liquid level, closing a third valve of a nitrogen pipeline and a second valve on an acid tar conveying pipeline, opening a fourth valve on an acid tar tank tail gas pipeline, and returning the acid tar tank tail gas to a main diffusing gas pipe with a small flow rate under the limitation of a throttling orifice plate for supplementing the nitrogen sealing nitrogen amount introduced by the main diffusing gas pipe; after the pressure and the main diffused gas pipe reach balance, opening a first valve on the full-flow pipeline of the acid tar, and continuing to perform full-flow operation of the acid tar;

4) after the acid tar is accumulated to a set amount, the acid tar is manually fished out and sent to an acid tar oil tank through an acid tar manual fishing outlet, and then the acid tar is pumped out under the pressure of nitrogen.

Technical Field

The invention relates to the technical field of ammonia recovery units of coal gas purification devices in the coking industry, in particular to a process and equipment for recovering acid tar in an ammonium sulfate full-flow groove.

Background

Ammonia, a nitrogen-containing compound, is a byproduct of the coal coking process. Generally, dry coal contains about 2% of nitrogen, 40-50% of the nitrogen enters raw gas, most ammonia is formed, and a small part of the nitrogen forms hydrogen cyanide and pyridine.

Ammonia in the coal gas is directly removed from the coal gas by a saturator method, namely, a mother liquor circulating pump is used for carrying out large circulation on the coal gas entering a front chamber of the saturator to directly spray sulfuric acid mother liquor to prepare ammonium sulfate, when the ammonium sulfate mother liquor of the saturator reaches the solubility limit of the ammonium sulfate, ammonium sulfate crystals are separated out, the reaction is a reversible reaction, the ammonium sulfate crystal mother liquor containing the ammonium sulfate crystals needs to be timely pumped into a crystallization tank to be crystallized and precipitated, the ammonium sulfate clear liquor fully flows back to the saturator, the precipitated crystal liquor automatically flows to a centrifugal machine to be centrifugally separated, the ammonium sulfate crystals are sent to a vibrating fluidized bed dryer, the centrifugal mother liquor and the full flow clear liquor are returned to the saturator together, and the concentration of the ammonium sulfate mother liquor is reduced; mother liquor overflowing from a liquid overflow port in the middle of the saturator flows into a liquid seal tank in the overflow tank and then overflows to the overflow tank, and then is sent into a rear chamber of the saturator by a small mother liquor pump to be sprayed in a small circulation mode to continuously recover ammonia gas so as to reach the standard of deamination of outlet coal gas, and meanwhile, sulfuric acid is supplemented into the liquid seal tank in the overflow tank. The method is characterized in that sulfuric acid is adopted to absorb ammonia gas in coal gas, a small amount of tar is contained in the coal gas, when sulfuric acid solution is adopted in a saturator to reversely spray the coal gas, the tar in the coal gas can be washed off while the ammonia gas is absorbed, the tar floats on the ammonium sulfate solution due to different specific gravities, the ammonium sulfate solution flows to a full flow groove through an inner liquid seal groove, manual fishing is carried out in the full flow groove at regular intervals, an acid tar slag box is sent through an acid tar manual fishing outlet at the top of the full flow groove, and the fished acid tar is used as waste to be loaded outside or sent to be mixed with coal manually.

The existing full-flow groove of the spray saturator comprises an inner cylinder and an outer cylinder, wherein the inner cylinder is an inner liquid seal groove, the outer cylinder is a full-flow groove, the inner liquid seal groove is provided with a full-flow pipe connected with a full-flow port of a saturator washing chamber, the full-flow pipe is inserted into the bottom of the inner cylinder of the full-flow groove filled with mother liquid from the upper part and plays a role of gas water seal to prevent gas in the saturator from leaking out, the outer cylinder is provided with a mother liquid outlet, an overflow port and an acid tar manual fishing outlet at the top, the mother liquid in the inner cylinder flows to the outer cylinder and is pumped out from the outer cylinder by a small mother liquid pump to be sent to the gas outlet of the saturator washing chamber for spraying and recycling, when the full-flow rate of the mother liquid is large, the tar is sent to a mother liquid storage tank through the full-flow port, and floats on ammonium sulfate solution in the full-flow groove of the outer cylinder.

The prior process and the prior equipment have the defects that: the manual fishing of acid tar is intermittent operation, the labor environment is dangerous, if the manual fishing is not timely, the acid tar in the full flow groove can enter the overflow pipe along with the mother liquid and finally flow into the mother liquid storage tank to pollute the mother liquid, so that the color of the produced ammonium sulfate is blackened, the product quality is reduced, a large amount of impurities are deposited at the bottom of the mother liquid storage tank, the cleaning is very difficult, the product quality is influenced, and the labor capacity of operators is increased.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a process and equipment for recovering acid tar in an ammonium sulfate full-flow groove. Not only improves the product quality, but also realizes the pipeline transportation of the acid tar and reduces the labor intensity of the operating personnel.

In order to achieve the purpose, the invention adopts the following technical scheme:

an ammonium sulfate full flow groove acid tar recovery device comprises a saturator, a full flow groove, a mother liquor storage tank, a small mother liquor circulating pipe and an acid tar groove; the mother liquid full flow pipe of the full flow groove is inserted into the bottom of the full flow groove, the saturator is connected with the full flow groove through a pipeline, and the acid tar full flow pipe of the full flow groove is connected with the acid tar groove; the acid tar tank is provided with an acid tar inlet interface, a nitrogen interface, a tail gas diffusing interface and an acid tar outlet at the bottom of the insertion groove; one end of the small mother liquor circulating pipe is connected with the saturator, and the other end is respectively connected with the mother liquor storage tank and the full flow tank through pipelines.

And a small mother liquor circulating pump is arranged on the small mother liquor circulating pipe.

The acid tar tank is provided with a pressure gauge and a liquid level meter.

The acid tar full-flow pipeline is provided with a first valve; the acid tar outlet is connected with an acid tar conveying pipeline, and a second valve is arranged on the acid tar conveying pipeline.

The nitrogen interface is connected with a nitrogen pipeline, and a third valve is arranged on the nitrogen pipeline; the tail gas diffusing interface is connected with an acid tar tank tail gas pipeline, the acid tar tank tail gas pipeline is connected with a diffusing main pipe, and the acid tar tank tail gas pipeline is provided with a throttling orifice plate and a fourth valve.

And a fifth valve is arranged on the mother liquid full flow pipe.

A technology for recovering acid tar in an ammonium sulfate full-flow tank specifically comprises the following steps:

1) opening a fourth valve of an acid tar tank tail gas pipeline to enable the acid tar tank tail gas pipeline to be in a communicated state with a main discharge pipe, namely the acid tar tank is in a normal pressure state, opening a first valve on an acid tar full-flow pipeline, and enabling full-flow acid tar to flow out from an acid tar manual fishing-out port of the full-flow tank and enter an acid tar tank;

2) after the acid tar in the acid tar tank is accumulated to a set height, closing a first valve of an acid tar full-flow pipeline, closing a fourth valve of an acid tar tank tail gas pipeline, opening a second valve of an acid tar conveying pipeline, opening a third valve of a nitrogen pipeline, quickly conveying the acid tar to a loading truck through a pipeline under the back pressure of nitrogen or directly conveying the acid tar to blended coal, and finishing the purging of the pipeline after the conveying is finished;

3) when the acid tar liquid level in the acid tar tank shows that the acid tar liquid level reaches a low liquid level, closing a third valve of a nitrogen pipeline and a second valve on an acid tar conveying pipeline, opening a fourth valve on an acid tar tank tail gas pipeline, and returning the acid tar tank tail gas to a main diffusing gas pipe with a small flow rate under the limitation of a throttling orifice plate for supplementing the nitrogen sealing nitrogen amount introduced by the main diffusing gas pipe; after the pressure and the main diffused gas pipe reach balance, opening a first valve on the full-flow pipeline of the acid tar, and continuing to perform full-flow operation of the acid tar;

4) after the acid tar is accumulated to a set amount, the acid tar is manually fished out and sent to an acid tar oil tank through an acid tar manual fishing outlet, and then the acid tar is pumped out under the pressure of nitrogen.

Compared with the prior art, the invention has the beneficial effects that:

1) the acid tar full-flow type coal filling machine is provided with the acid tar oil groove, acid tar can automatically and fully flow to the acid tar oil groove after being accumulated to a certain height in the full-flow groove, high-pressure nitrogen is introduced after the acid tar in the acid tar oil groove is accumulated to a certain height, the acid tar oil is conveyed to a loading vehicle under pressure through the backpressure of the nitrogen or directly conveyed to coal, the pipeline purging is completed at the same time after the conveying is completed, the maintenance is very convenient, the introduced nitrogen is recycled and discharged to a main diffusing gas pipe in a groove area at last according to the identity of the nitrogen, and the nitrogen is used for supplementing the nitrogen for nitrogen sealing.

2) The full flow groove mother liquor flows from the bottom to avoid the acid tar floating on the ammonium sulfate liquid level from flowing to the mother liquor storage tank to pollute the mother liquor along with the mother liquor, thus improving the product quality.

3) The acid tar realizes pipeline transportation and is beneficial to environmental protection; the operation of the operating personnel in a severe environment is avoided, the personal safety of the operating personnel is guaranteed, and the labor intensity of the operating personnel is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure and process of the present invention.

In the figure: 1-saturator 2-full flow groove 3-mother liquor storage tank 4-small mother liquor circulating pump 5-acid tar tank 6-first valve 7-second valve 8-third valve 9-fourth valve 10-fifth valve 11-orifice plate LRA 01-liquid level recording alarm instrument PR 01-pressure recording instrument H-high limit L-low limit L-

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in figure 1, the equipment for recovering acid tar in the ammonium sulfate full flow groove comprises a saturator 1, a full flow groove 2, a mother liquor storage tank 3, a small mother liquor circulating pipe and an acid tar groove 5.

The bottom pipeline of the mother liquor storage tank 3 is converged with the bottom pipeline of the full flow tank 2 and then is connected with one end of a small mother liquor circulating pipe, the other end of the small mother liquor circulating pipe is connected with the saturator 1, and a small mother liquor circulating pump 4 is arranged on the small mother liquor circulating pipe.

The mother liquid full flow pipe of the full flow groove 2 is inserted into the bottom of the full flow groove 2, a fifth valve 10 is arranged on the mother liquid full flow pipe, and the mother liquid full flow pipe is connected with a mother liquid storage tank 3.

The saturator 1 is connected with the full flow groove 2 through a pipeline. The acid tar full-flow pipeline of the full-flow tank 2 is connected with an acid tar tank 5, and the acid tar full-flow pipeline is provided with a first valve 6.

The acid tar tank 5 is provided with an acid tar inlet interface, a nitrogen interface, a tail gas diffusing interface and an acid tar outlet inserted into the bottom of the tank. The acid tar inlet interface is connected with an acid tar full flow pipeline, the nitrogen interface is connected with a nitrogen pipeline, and a third valve 8 is arranged on the nitrogen pipeline. The tail gas diffusing interface is connected with an acid tar tank tail gas pipeline, the acid tar tank tail gas pipeline is connected with a diffusing main pipe, and the acid tar tank tail gas pipeline is provided with a throttling orifice plate 11 and a fourth valve 9. The acid tar outlet is connected with an acid tar conveying pipeline, and a second valve 7 is arranged on the acid tar conveying pipeline.

The acid tar tank 5 is provided with a liquid level recording alarm instrument LRA01 and a pressure recording instrument PR01, and the liquid level recording alarm instrument LRA01 is provided with a high limit H and a low limit L.

The full-flow groove 2 is improved, the original upper full-flow mode of the mother liquid full-flow pipe is changed into the mode of being inserted into the bottom of the full-flow groove 2, the mother liquid full-flow mode can prevent acid tar floating on the liquid level of ammonium sulfate from flowing into a mother liquid storage tank 3 along with the mother liquid, so that the acid tar can be gradually accumulated on the liquid level of the ammonium sulfate, the liquid level of the ammonium sulfate can be gradually reduced according to pressure balance, when the liquid level is reduced to a certain height, the liquid level of the acid tar can be raised to the height of a manual acid tar fishing opening, the full-flow of the acid tar is started, and the working state of the full-flow groove 2 is equivalent to a liquid separator of the ammonium sulfate mother liquid and the acid tar.

A technology for recovering acid tar in an ammonium sulfate full-flow tank specifically comprises the following steps:

1) and opening a fourth valve 9 of the acid tar tank tail gas pipeline to enable the acid tar tank tail gas pipeline and the emission main pipe to be in a communicated state, namely the acid tar tank 5 is in a normal pressure state, opening a first valve 6 on the acid tar full-flow pipeline, and manually fishing out the full-flow acid tar from the acid tar of the full-flow tank 2 to enable the full-flow acid tar to flow out of the port and enter the acid tar tank 5.

2) When the acid tar in the acid tar tank 5 is accumulated to a certain height, the liquid level recording alarm instrument LRA01 displays that the liquid level high limit H is reached, the first valve 6 of the full-flow pipeline of the acid tar is closed, the fourth valve 9 of the tail gas pipeline of the acid tar tank is closed, the second valve 7 of the acid tar conveying pipeline is opened, the third valve 8 of the nitrogen pipeline is opened, the acid tar can be quickly conveyed to a loading bin through a pipeline under the back pressure of nitrogen to be delivered or directly delivered to the coal blending bin, the pipeline is swept and simultaneously after the conveying is completed, and the device is very convenient and does not need to be maintained.

3) When the acid tar liquid level recording alarm instrument LRA01 in the acid tar tank 5 shows that the liquid level lower limit L is reached, the third valve 8 on the introduced 4 kg nitrogen pipeline and the second valve 7 on the acid tar conveying pipeline are closed, and the fourth valve 9 on the acid tar tank tail gas pipeline is opened, so that the acid tar tank tail gas is limited by the throttle orifice 11, the small-flow return diffusion gas main pipe is used for supplementing the nitrogen sealing nitrogen amount introduced by the diffusion gas main pipe, and after the pressure and the diffusion gas main pipe reach balance, the first valve 6 on the acid tar full flow pipeline is opened, and the full flow operation of the acid tar is continued.

4) Because the amount of the acid tar is small, the acid tar can be manually fished after the acid tar is accumulated to a certain amount, the acid tar is conveyed to an acid tar oil groove through an acid tar manual fishing outlet, and the acid tar is conveyed out under the pressure of nitrogen.

The full-flow trough 2 of the invention can prevent acid tar floating on the surface of ammonium sulfate from flowing to the mother liquor storage tank 3 to pollute the mother liquor along with the mother liquor, thus improving the product quality. The acid tar realizes pipeline transportation and is beneficial to environmental protection; the operation of the operating personnel in a severe environment is avoided, the personal safety of the operating personnel is guaranteed, and the labor intensity of the operating personnel is reduced.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.