CN216878682U

CN216878682U - Pigment red 146 tail gas treatment system

Info

Publication number: CN216878682U
Application number: CN202122505710.8U
Authority: CN
Inventors: 申井会; 吴建良
Original assignee: Ningxia Caiyan Technology Co ltd
Current assignee: Ningxia Caiyan Technology Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-07-05
Anticipated expiration: 2031-10-18

Abstract

The utility model provides a pigment red 146 tail gas treatment system, which comprises a first absorption tower, a second absorption tower, a first adjusting tank and a second adjusting tank, wherein the first adjusting tank is arranged at the bottom of the first absorption tower, the second adjusting tank is arranged at the bottom of the second absorption tower, a gas phase outlet is arranged at the top of the first absorption tower, a gas phase inlet is arranged on the side wall of the first adjusting tank and is used for connecting a tail gas pipeline, a liquid phase outlet is arranged at the bottom of the first adjusting tank and is connected with a liquid phase inlet at the upper part of the first absorption tower through a first backflow pipeline, the gas phase outlet at the top of the first absorption tower is communicated with the second adjusting tank through a pipeline, a liquid phase outlet is arranged at the bottom of the second adjusting tank, the gas phase outlet at the top of the second absorption tower is connected with a chimney through an emptying pipeline, a first control valve is arranged on the first backflow pipeline, a second control valve is arranged on the second backflow pipeline, the system performs four-stage absorption on the tail gas essentially, so that 99.99 percent of acid gas in the tail gas is absorbed.

Description

Pigment red 146 tail gas treatment system

Technical Field

The utility model relates to the technical field of preparation of pigment red 146, in particular to a pigment red 146 tail gas treatment system.

Background

Acid gas can be generated in the production processes of the pigment red 146, 170, 177 and the like, and can not be directly discharged according to the environmental protection requirement, so that the tail gas can be discharged after reaching the standard after being treated.

In the prior art, alkali liquor is adopted to absorb tail gas and then is discharged, but the absorption effect is poor, and acid mist still remains after emptying, thereby causing environmental pollution.

Disclosure of Invention

It is necessary to provide a pigment red 146 tail gas treatment system, which comprises a first absorption tower, a second absorption tower, a first adjusting groove and a second adjusting groove, wherein the first adjusting groove is arranged at the bottom of the first absorption tower, the second adjusting groove is arranged at the bottom of the second absorption tower, a gas phase outlet is arranged at the top of the first absorption tower, the first adjusting groove is a horizontal groove and is used for containing or recovering alkali liquor, the bottom of the first absorption tower is communicated with the first adjusting groove so that gas in the adjusting groove floats upwards to enter the absorption tower, a gas phase inlet is arranged on the side wall of the first adjusting groove and is used for connecting a tail gas pipeline, a liquid phase outlet is arranged at the bottom of the first adjusting groove and is connected with a liquid phase inlet at the upper part of the first absorption tower through a first backflow pipeline, the gas phase outlet at the top of the first absorption tower is communicated with the second adjusting groove through a pipeline, the bottom of the second absorption tower is communicated with the second adjusting groove, so that the gas in the mediation groove floats upwards and gets into in the absorption tower, set up gaseous phase entry on mediating the groove lateral wall of second, be used for connecting the gaseous phase export at first absorption tower top, set up the liquid phase export in the bottom of second mediation groove, the liquid phase export is connected with the liquid phase entry on second absorption tower upper portion through second backflow pipeline, the gaseous phase export at second absorption tower top passes through the evacuation pipeline and connects the chimney, first mediation groove, on set up first moisturizing mouth, first concentration detector, set up second moisturizing mouth on the second mediation groove, second moisturizing mouth, second concentration detector, still set up first control valve on first backflow pipeline, still set up the second control valve on second backflow pipeline, first concentration detector is connected with first control valve, second concentration detector is connected with the second control valve.

Preferably, the first absorption tower is also internally provided with a demister and a packing layer.

Preferably, the end of the exhaust gas duct extends below the liquid level in the first conditioning tank.

Preferably, a distributor is arranged in the first absorption tower, and the distributor is provided with a plurality of spray heads to spray the alkali liquor to form water mist which is distributed in the tower.

Preferably, the first adjusting groove and the second adjusting groove are respectively provided with an overflow port.

Preferably, an evacuation control valve is further arranged on the evacuation pipeline, a gas return pipeline is further arranged between the evacuation pipeline and the tail gas pipeline, and a gas return control valve is arranged on the gas return pipeline.

According to the utility model, two stages of absorption towers are arranged in series to carry out two-stage absorption, an alkali liquor atomization device is arranged in each absorption tower to carry out spray absorption, tail gas enters the alkali liquor in a first mediation groove to carry out primary liquid bath absorption, and enters the alkali liquor in a second mediation groove after primary absorption to carry out secondary liquid bath absorption. Therefore, the system essentially performs four-stage absorption on the tail gas, namely primary alkali liquid bath absorption, primary spraying absorption, secondary alkali liquid bath absorption and secondary spraying absorption, so that 99.99 percent of acid gas in the tail gas is absorbed.

Drawings

FIG. 1 is a schematic diagram of the present system.

In the figure: the absorption tower comprises a first absorption tower 10, a demister 11, a packing layer 12, a distributor 13, a second absorption tower 20, a first adjusting groove 30, a first return pipeline 31, a first water supplementing opening 32, a first alkali supplementing opening 33, a first concentration detector 34, a first control valve 35, a second adjusting groove 40, a second return pipeline 41, a second water supplementing opening 42, a second alkali supplementing opening 43, a second concentration detector 44, a second control valve 45, a tail gas pipeline 50, an emptying pipeline 60, an emptying control valve 61, an air return pipeline 70 and a return control valve 71.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Referring to fig. 1, an embodiment of the present invention provides a pigment red 146 tail gas treatment system, including a first absorption tower 10, a second absorption tower 20, a first adjustment tank 30 and a second adjustment tank 40, wherein the first adjustment tank is disposed at the bottom of the first absorption tower 10, the second adjustment tank is disposed at the bottom of the second absorption tower 20, a gas phase outlet is disposed at the top of the first absorption tower 10, the first adjustment tank 30 is a horizontal tank and is used for containing or recovering alkali liquor, the bottom of the first absorption tower 10 is communicated with the first adjustment tank 30 so that gas in the adjustment tank floats upwards to enter the absorption tower, a gas phase inlet is disposed on a side wall of the first adjustment tank 30 and is used for connecting a tail gas pipeline 50, a liquid phase outlet is disposed at the bottom of the first adjustment tank 30 and is connected with a liquid phase inlet at the upper part of the first absorption tower 10 through a first return pipeline 31, the gas phase outlet at the top of the first absorption tower 10 is communicated with the second adjustment tank 40 through a pipeline, the bottom of the second absorption tower 20 is communicated with a second adjusting groove 40 so that the gas in the adjusting groove floats upwards and enters the absorption tower, a gas phase inlet is arranged on the side wall of the second adjusting groove 40 and is used for connecting a gas phase outlet at the top of the first absorption tower 10, a liquid phase outlet is arranged at the bottom of the second adjusting groove 40 and is connected with a liquid phase inlet at the upper part of the second absorption tower 20 through a second backflow pipeline 41, a gas phase outlet at the top of the second absorption tower 20 is connected with a chimney through an emptying pipeline 60, a first water supplementing port 32, a first alkali supplementing port 33 and a first concentration detector 34 are arranged on the first adjusting groove 30, a second water supplementing port 42, a second alkali supplementing port 43 and a second concentration detector 44 are arranged on the second adjusting groove 40, a first control valve 35 is also arranged on the first backflow pipeline 31, a second control valve 45 is also arranged on the second backflow pipeline 41, and the first concentration detector 34 is connected with the first control valve 35, the second concentration detector 44 is connected to a second control valve 45.

In this scheme, in order to guarantee the ability of alkali lye absorption acid tail gas, want the concentration control of alkali lye high as far as possible, however the alkali lye viscosity that the concentration is high is also higher, gets into the absorption tower after, causes the jam of packing layer, leads to the packing layer penetrability poor, and adsorption effect is not good, so control the concentration of alkali lye through the real-time detection mode of diluting in real time.

Further, a demister 11 and a packing layer 12 are provided inside the first absorption tower 10.

Further, the end of the exhaust duct 50 extends below the liquid level in the first adjustment tank 30.

Further, a distributor 13 is arranged inside the first absorption tower 10, and the distributor 13 is provided with a plurality of spray heads so as to spray the alkali liquor to form water mist which is distributed in the tower.

Furthermore, the first adjustment groove 30 and the second adjustment groove 40 are provided with overflow ports, respectively.

Further, an evacuation control valve 61 is provided in the evacuation line 60, a return line 70 is provided between the evacuation line 60 and the exhaust line 50, and a return control valve 71 is provided in the return line 70. When the first concentration detector 34 in the first adjusting groove 30 detects that the viscosity of the alkali liquor is too high, at this time, the first concentration detector 34 sends a signal to the first water replenishing port 32 to start replenishing water into the first adjusting groove 30 to dilute the alkali liquor, and simultaneously, the first control valve 35 on the first return pipeline 31 is closed to prevent the alkali liquor in the first adjusting groove 30 from flowing back into the first absorption tower 10. This will cause the exhaust gas in the first absorption tower 10 to have poor absorption effect, and the unabsorbed exhaust gas enters the second absorption tower 20, and only passes through the first-stage absorption of the second absorption tower 20, and the absorption effect cannot be guaranteed, so the first concentration detector 34 sends a signal to the air return control valve 71 and the evacuation control valve 61 at this time, so that the evacuation control valve 61 is closed, and the evacuation is avoided, so that the air return control valve 71 is opened, and the unabsorbed exhaust gas joins the exhaust gas pipeline 50 again and enters the system, and is absorbed again. After the alkali liquor in the first adjusting groove 30 is diluted to reach the standard, the first control valve 35 and the emptying control valve 61 are opened, and the normal circulating absorption state is entered.

The modules or units in the device of the embodiment of the utility model can be combined, divided and deleted according to actual needs.

The above disclosure is only illustrative of the preferred embodiments of the present invention, which should not be taken as limiting the scope of the utility model, but rather the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It will be understood by those skilled in the art that all or part of the above-described embodiments may be implemented and equivalents thereof may be made to the claims of the present invention while remaining within the scope of the utility model. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A pigment red 146 tail gas processing system which characterized in that: the absorption tower comprises a first absorption tower, a second absorption tower, a first mediation groove and a second mediation groove, wherein the first regulation groove is arranged at the bottom of the first absorption tower, the second regulation groove is arranged at the bottom of the second absorption tower, a gas phase outlet is arranged at the top of the first absorption tower, the first mediation groove is a horizontal groove and is used for containing or recovering alkali liquor, the bottom of the first absorption tower is communicated with the first mediation groove so that gas in the mediation groove floats upwards and enters the absorption tower, a gas phase inlet is arranged on the side wall of the first mediation groove and is used for connecting a tail gas pipeline, a liquid phase outlet is arranged at the bottom of the first mediation groove and is connected with a liquid phase inlet at the upper part of the first absorption tower through a first backflow pipeline, the gas phase outlet at the top of the first absorption tower is communicated with the second mediation groove through a pipeline, the bottom of the second absorption tower is communicated with the second mediation groove so that gas in the mediation groove floats upwards and enters the absorption tower, set up the gaseous phase entry on the second mediation groove lateral wall for connect the gaseous phase export at first absorption tower top, set up the liquid phase export in the bottom of second mediation groove, the liquid phase export passes through second return line and is connected with the liquid phase entry on second absorption tower upper portion, the gaseous phase export at second absorption tower top passes through the evacuation pipeline and connects the chimney, set up first moisturizing mouth on the first mediation groove, first mend alkali mouth, first concentration detector, set up the second moisturizing mouth on the second mediation groove, second mend alkali mouth, second concentration detector, still set up first control valve on first return line, still set up the second control valve on second return line, first concentration detector is connected with first control valve, second concentration detector is connected with the second control valve.

2. The pigment red 146 tail gas treatment system of claim 1, wherein: the first absorption tower is internally provided with a demister and a packing layer.

3. The pigment red 146 tail gas treatment system of claim 1, wherein: the end part of the tail gas pipeline extends into the position below the liquid level of the first adjusting groove.

4. The pigment red 146 tail gas treatment system of claim 1, wherein: the first absorption tower is internally provided with a distributor which is provided with a plurality of spray heads so as to spray the alkali liquor to form water mist which is fully distributed in the tower.

5. The pigment red 146 tail gas treatment system of claim 1, wherein: the first adjusting groove and the second adjusting groove are respectively provided with an overflow port.

6. The pigment red 146 tail gas treatment system of claim 1, wherein: an emptying control valve is arranged on the emptying pipeline, a gas return pipeline is arranged between the emptying pipeline and the tail gas pipeline, and a gas return control valve is arranged on the gas return pipeline.