CN215939506U

CN215939506U - Crude benzene residue tail gas cleanup unit

Info

Publication number: CN215939506U
Application number: CN202121163580.8U
Authority: CN
Inventors: 孔祥攀; 赵云鹏; 他文兵; 孔德春; 李鹏; 解润润; 李开猛; 李昆; 普国强
Original assignee: Shizong Coking Chemical Co ltd
Current assignee: Shizong Coking Chemical Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2022-03-04
Anticipated expiration: 2031-05-27

Abstract

The utility model provides a crude benzene residue tail gas purification device, which comprises a crude benzene washing oil regenerator and a residue tank communicated with the crude benzene washing oil regenerator, wherein a residue discharge port provided with a valve is arranged on the residue tank, and a tail gas exhaust port is arranged at the top of the residue tank. The solution is sprayed to the output end of the tail gas pipe through the spray header, harmful substances in the tail gas are dissolved through the solution, the dissolved harmless gas is discharged into the atmosphere through the emptying pipe, and the solution continues to enter the liquid discharge pipe for recycling. The saturated solution can be recycled through the saturated solution pipe, so that the environment is protected, and the resource recycling is realized.

Description

Crude benzene residue tail gas cleanup unit

Technical Field

The utility model relates to a tail gas purification device, in particular to a crude benzene residue tail gas purification device, and belongs to the technical field of design and manufacture of tail gas purification facilities.

Background

In the crude benzene production process of the coal coking industry, the benzene hydrocarbon in the coal gas is recovered by adopting a wash oil absorption method. The rich oil is heated to 180 ℃ by a tubular furnace, the rich oil is recycled after debenzolization in a debenzolization tower, about 1.5 percent of the debenzolization wash oil enters a regenerator, the regenerated oil vapor enters the bottom of the debenzolization tower to be used as a debenzolization heat source for debenzolization, and the residue remained at the bottom of the regenerator is periodically discharged into a residue tank and then is sent to an mechanized tank. During slag discharge and pressure relief after slag discharge, a large amount of toxic and harmful tail gas in the slag groove is directly discharged into the atmosphere, and serious pollution is caused to the atmospheric environment. The residues pollute the ground environment and bring serious harm to the health of the enterprise workers. In the existing mode, the tail gas of the residue tank enters the coal gas along with the suction force of an air blower before being introduced into a negative pressure section primary cooler, but the distance between a crude benzene production system and a coal gas condensation blowing system is too large, the pipeline is too long, and the discharged residue is easy to block an exhaust pipeline of the residue tank, so that the residue cannot be discharged. There is therefore a need for improvements in the prior art.

Disclosure of Invention

The utility model provides a crude benzene residue tail gas purification device, which aims to solve the problem that when the existing crude benzene residue tail gas is introduced into a gas pipeline for treatment, residue blocks an exhaust pipeline of a residue tank due to overlong pipelines.

The utility model is completed by the following technical scheme: the utility model provides a crude benzol residue tail gas cleanup unit, including crude benzol washing oil regenerator, the residue groove that is linked together with crude benzol washing oil regenerator, be equipped with the row's cinder notch of establishing the valve on it on the residue groove, residue groove top is equipped with the tail gas vent, its characterized in that tail gas vent is linked together through tail gas pipe and the tail gas purification jar of establishing the evacuation pipe on it, be equipped with a plurality of shower heads relative with tail gas pipe output end in the tail gas purification jar, the shower head is linked together through feed pipe and feed pump output, tail gas purification jar bottom is equipped with the feed liquor pipe that is linked together with the feed pump input, so that spray solution to tail gas pipe output end through the shower head, dissolve the harmful substance in the tail gas through the solution, harmless gas after dissolving is discharged into the atmosphere through the evacuation pipe, the solution then continues to enter into feed liquor pipe recycle.

The tail gas pipe output end extends in to tail gas clean-up tank, and the shower head is located around the tail gas pipe output end to the shower head sprays the tail gas direction looks perpendicular of thing direction and tail gas pipe output end, so that through the solution that the shower that locates around the tail gas pipe output end sprays, fully dissolves, absorbs the harmful substance in the tail gas, avoids harmful substance to discharge into the atmosphere and causes the pollution.

The utility model discloses a tail gas pipe, including tail gas pipe, tail gas pipe input end, the tail gas pipe of control valve rear is equipped with the control valve, and the tail gas pipe and the blowing pipe of control valve rear are linked together to blow down earlier and avoid blockking up through the blowing pipe.

The feed pump is set to two side by side, and its input and output are linked together with feed pipe and feed liquor pipe respectively, and the feed pipe output extends and is linked together with a plurality of sprinkler heads in to the tail gas purification jar, and feed liquor pipe input is linked together with the inlet of locating tail gas purification tank bottom to supply liquid in to the tail gas purification jar through two liquid pumps in turn or simultaneously, in order to satisfy different demands.

The liquid supply pipe is respectively connected with the saturated solution discharge pipe and the new solution inlet pipe so as to replace the saturated solution.

The top of the residue tank is communicated with a low-pressure steam pipe on which a valve is arranged, and a residue discharge port is communicated with an external mechanical tar ammonia water clarifying tank through a pipeline so as to provide low-pressure steam for the residue tank through the low-pressure steam pipe, so that the residue is pressed into the mechanical tar ammonia water clarifying tank through a residue discharge pipe for treatment.

The utility model has the following advantages and effects: by adopting the scheme, the solution is sprayed to the output end of the tail gas pipe through the spray head, harmful substances in the tail gas are dissolved through the solution, the dissolved harmless gas is discharged into the atmosphere through the emptying pipe, and the solution continues to enter the liquid discharge pipe for recycling. The saturated solution can be recycled through the saturated solution pipe, so that the environment is protected, and the resource recycling is realized. Is an ideal purifying device.

Drawings

FIG. 1 is a block diagram of the present invention;

fig. 2 is a partial schematic view of another structure of fig. 1.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The utility model provides a crude benzene residue tail gas purification device, which comprises a crude benzene oil-washing regenerator 1 and a residue tank 15 communicated with the crude benzene oil-washing regenerator 1, wherein a residue discharge port provided with a valve is arranged on the residue tank 15, the residue discharge port 14 is arranged at the top of the residue tank 15 and is inserted into the bottom of the residue tank 15 through an insertion pipe, the residue discharge port 14 is communicated with an external mechanized tar ammonia water clarifying tank through a pipeline to discharge residues, as shown in figure 2, or the residue discharge port 14 provided with the valve is arranged at the bottom of the residue tank 15, the residue discharge port 14 is communicated with the external mechanized tar ammonia water clarifying tank through a pipeline to discharge residues, as shown in figure 1, a tail gas exhaust port is arranged at the top of the residue tank 15 and is communicated with a tail gas purification tank 8 provided with an emptying pipe 6 through a tail gas pipe 4, a plurality of spray headers 7 opposite to the output end of the tail gas pipe 4 are arranged in the tail gas purification tank 8, the spray headers 7 are communicated with the output end of a liquid supply pump 12 through a liquid supply pipe 11, the bottom of the tail gas purification tank 8 is provided with a liquid inlet pipe 13 communicated with the input end of a liquid supply pump 12, the output end of a tail gas pipe 4 extends into the tail gas purification tank 8, spray heads 7 are arranged around the output end of the tail gas pipe 4, the spray direction of the spray heads 7 is vertical to the tail gas direction of the output end of the tail gas pipe 4, the input end of the tail gas pipe 4 is provided with a control valve 5, the tail gas pipe 4 behind the control valve 5 is communicated with a purging pipe 3, the liquid supply pumps 12 are arranged in parallel and are provided with two sets, the input ends and the output ends of the two sets are respectively communicated with a liquid supply pipe 11 and the liquid inlet pipe 13, the output end of the liquid supply pipe 11 extends into the tail gas purification tank and is communicated with a plurality of spray heads 7, the input end of the liquid inlet pipe 13 is communicated with a liquid outlet arranged at the bottom of the tail gas purification tank 8, the liquid supply pipe 11 is also connected with a saturated solution discharge pipe 10 and a new solution liquid inlet pipe 9, the top of a residue tank 15 is communicated with a low-pressure steam pipe 2 on which is provided with a valve, so as to feed low-pressure steam into the residue tank 15.

Claims

1. The utility model provides a crude benzol residue tail gas cleanup unit, including crude benzol washing oil regenerator, wash the residue groove that oil regenerator is linked together with crude benzol, be equipped with the row's cinder notch of establishing the valve on it on the residue groove, residue groove top is equipped with the tail gas vent, its characterized in that tail gas vent is linked together through tail gas pipe and the tail gas purification jar of establishing the evacuation pipe on it, be equipped with a plurality of shower heads relative with tail gas pipe output end in the tail gas purification jar, the shower head is linked together through feed pipe and feed pump output, tail gas purification tank bottom is equipped with the feed liquor pipe that is linked together with the feed pump input.

2. The crude benzene residue tail gas cleanup device of claim 1, wherein the tail gas pipe output end extends into the tail gas cleanup tank, the spray header is disposed around the tail gas pipe output end, and the spray header sprays in a direction perpendicular to the tail gas direction at the tail gas pipe output end.

3. The crude benzene residue tail gas purification device as claimed in claim 1, wherein a control valve is arranged at the input end of the tail gas pipe, and the tail gas pipe behind the control valve is communicated with the purging pipe.

4. The crude benzene residue tail gas cleanup device of claim 1, wherein the two liquid supply pumps are arranged in parallel, and the input and output ends of the two liquid supply pumps are respectively communicated with a liquid supply pipe and a liquid inlet pipe, the output end of the liquid supply pipe extends into the tail gas cleanup tank and is communicated with the plurality of spray heads, and the input end of the liquid inlet pipe is communicated with a liquid inlet arranged at the bottom of the tail gas cleanup tank.

5. The crude benzene residue tail gas cleanup unit as recited in claim 1, wherein the liquid supply pipes are connected to the saturated solution discharge pipe and the fresh solution feed pipe, respectively.

6. The crude benzene residue tail gas purification device as claimed in claim 1, wherein the top of the residue tank is communicated with a low pressure steam pipe on which a valve is arranged, and the residue discharge port is communicated with an external mechanical tar ammonia water clarifying tank through a pipeline.