CN210752037U

CN210752037U - Tail gas treatment equipment in chromium-containing heavy metal hazardous waste disposal process

Info

Publication number: CN210752037U
Application number: CN201921036591.2U
Authority: CN
Inventors: 丁少辉; 陈祜; 姚希超
Original assignee: Ningxia Dekun Environmental Protection Science And Technology Industrial Group Co ltd
Current assignee: Ningxia Dekun Environmental Protection Science And Technology Industrial Group Co ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-06-16
Anticipated expiration: 2029-07-04

Abstract

The utility model provides a chromium-containing heavy metal danger is useless handles in-process tail gas treatment equipment, includes dust purification device, acid gas purification jar, sludge settling basin, and dust purification device is including subsiding the condensing jar and setting up the jar of keeping in that is used for collecting mud in subsiding the condensing jar below, and the bottom of subsiding the condensing jar and the top of the jar of keeping in intercommunication, the bottom and the sludge settling basin intercommunication of the jar of keeping in, the bottom and the sludge settling basin intercommunication of acid gas purification jar. The utility model discloses a dust purification device who sets up can mix the steam that produces when shrend with the flue gas, utilizes the condensation of steam, subsides the dust in the middle of the flue gas, sends into the acid gas purifying tank through the flue gas after will removing dust in, under the liquid level, makes the acid gas in the middle of the flue gas fully react with the solution to reach and purify acid gas.

Description

Tail gas treatment equipment in chromium-containing heavy metal hazardous waste disposal process

Technical Field

The utility model relates to a useless treatment facility technical field of heavy metal danger especially relates to a chromium-containing heavy metal danger is useless deals with in-process tail gas treatment facility.

Background

With the rapid development of the smelting industry, the metal processing industry, the machine manufacturing industry, the electroplating industry and other industries, the stock of solid waste and dangerous waste in China has reached a striking number. The chromium slag containing hexavalent chromium has strong oxidizing property and is easy to dissolve in water, and serious pollution to surrounding ground surfaces, soil, underground water sources and nearby rivers can be caused after long-time wind blowing, sun drying and rain. When the chromium slag is treated by the dry method, the chromium slag is mixed with a proper amount of coal or sawdust rice hulls, and is roasted at 540-600 ℃, so that the generated carbon monoxide and hydrogen are used as reducing agents, and water quenching is carried out under a sealed condition to consolidate the reduction effect, but a large amount of smoke is generated in the roasting process, the smoke contains a large amount of dust and acid gas, and if the smoke is not treated, the environment is polluted.

Disclosure of Invention

In view of this, it is necessary to provide a tail gas treatment device in the process of disposing chromium-containing heavy metal hazardous waste.

A tail gas treatment device in a chromium-containing heavy metal hazardous waste disposal process comprises a dust purification device, an acid gas purification tank and a sludge settling tank, wherein the dust purification device comprises a settling condensation tank and a temporary storage tank arranged below the settling condensation tank and used for collecting sludge, the bottom of the settling condensation tank is communicated with the top of the temporary storage tank, the bottom of the temporary storage tank is provided with a sludge discharge port, the sludge discharge port is communicated with the sludge settling tank through a second pipeline, the top of the acid gas purification tank is provided with a purified gas outlet, the bottom of the acid gas purification tank is provided with a sewage discharge port, the sewage discharge port is communicated with the sludge settling tank through a third pipeline, the settling condensation tank comprises a condensation dust removal chamber and a pre-mixing chamber arranged below the condensation dust removal chamber, the top of the condensation dust removal chamber is provided with a flue gas outlet, and the flue gas outlet is communicated with the acid gas, and the outlet end of the first pipeline extends to a position below the liquid level in the acid gas purification tank, the bottom of the condensation dust removal chamber is communicated with the top of the premixing chamber, the bottom of the premixing chamber is communicated with the top of the temporary storage tank, the lower part of the premixing chamber is provided with an air inlet pipe, the air inlet pipe is arranged in a herringbone mode and comprises a steam pipeline and a tail gas pipeline, the outlet end of the tail gas pipeline is communicated with the steam pipeline, and the outlet end of the steam pipeline is communicated with the inside of the premixing chamber.

Preferably, the upper portion of the premixing chamber is fixedly provided with a smoke collecting mechanism, the smoke collecting mechanism comprises a smoke collecting hood, a drainage tube and a blocking cap, the smoke collecting hood is horizontally and fixedly arranged at the outlet end of the premixing chamber, a round hole is formed in the middle of the top of the smoke collecting hood, the drainage tube penetrates through the round hole and is vertically and fixedly arranged above the smoke collecting hood, and the blocking cap is fixedly arranged at one end, far away from the smoke collecting hood, of the drainage tube.

Preferably, the fume collecting hood is conical, and the diameter of the fume collecting hood is 3/4 of the inner diameter of the premixing chamber.

Preferably, the top and the bottom of the blocking cap are both in a circular truncated cone shape.

Preferably, a shell is arranged outside the condensation dust removal chamber, a cavity is formed between the shell and the condensation dust removal chamber, an air inlet is formed in the upper portion of the cavity, and an air outlet is formed in the lower portion of the cavity.

Preferably, a mixing reaction cover is fixedly arranged at the outlet end of the first pipeline, one end of the mixing reaction cover is open, and the other end of the mixing reaction cover is communicated with the outlet end of the first pipeline.

Preferably, the side wall of the mixing reaction cover is provided with a strip-shaped hole.

Preferably, a gas baffle is fixedly arranged inside the acid gas purification tank, the gas baffle is horizontally arranged, and the gas baffle is located above the liquid level in the acid gas purification tank.

Preferably, the gas baffle is provided with gas leakage holes.

Preferably, the system also comprises a gas dryer and a dust collector, wherein the inlet end of the gas dryer is communicated with the purified gas outlet through a pipeline, and the outlet end of the gas dryer is communicated with the dust collector through a pipeline.

The utility model adopts the above technical scheme, its beneficial effect lies in: the utility model comprises a dust purification device, an acid gas purification tank and a sludge sedimentation tank, wherein the dust purification device comprises a sedimentation condensation tank and a temporary storage tank arranged below the sedimentation condensation tank and used for collecting sludge, the bottom of the sedimentation condensation tank is communicated with the top of the temporary storage tank, the bottom of the temporary storage tank is provided with a sludge discharge port which is communicated with the sludge sedimentation tank through a second pipeline, the top of the acid gas purification tank is provided with a purified gas outlet, the bottom of the acid gas purification tank is provided with a sewage discharge port which is communicated with the sludge sedimentation tank through a third pipeline, the sedimentation condensation tank comprises a condensation dust removal chamber and a premixing chamber arranged below the condensation dust removal chamber, the top of the condensation dust removal chamber is provided with a flue gas outlet which is communicated with the acid gas purification tank through a first pipeline, and the outlet end of the first pipeline extends to the position below the liquid level in the acid gas purification tank, the bottom of the condensation dust removal chamber is communicated with the top of the premixing chamber, the bottom of the premixing chamber is communicated with the top of the temporary storage tank, an air inlet pipe is arranged at the lower part of the premixing chamber and is arranged in a herringbone mode, the air inlet pipe comprises a steam pipeline and a tail gas pipeline, the outlet end of the tail gas pipeline is communicated with the steam pipeline, and the outlet end of the steam pipeline is communicated with the inside of the premixing chamber. The utility model discloses a dust purification device who sets up can mix the steam that produces when shrend with the flue gas to at dust purification device intensive mixing, utilize the condensation of steam, subside the dust in the middle of the flue gas, send into the acid gas purification jar through the flue gas after will removing dust in, and send into the flue gas after removing dust under the liquid level in the acid gas purification jar, make the acid gas in the middle of the flue gas fully react with the solution, thereby reach and purify acid gas.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the dust purification device of the present invention.

Fig. 3 is a schematic structural diagram of the acid gas purification tank of the present invention.

In the figure: the system comprises a dust purification device, a settling and condensing tank 101, a condensing and dedusting chamber 1011, a flue gas outlet 10111, a premixing chamber 1012, an air inlet pipe 1013, a steam pipeline 10131, a tail gas pipeline 10132, a smoke gathering mechanism 1014, a smoke gathering hood 10141, a drainage pipe 10142, a blocking cap 10143, a temporary storage tank 102, a sludge discharge port 1021, an acid gas purification tank 20, a gas baffle 201, a purified gas outlet 202, a sewage discharge port 203, a sludge settling tank 30, a gas dryer 40, a dust collector 50, a first pipeline 60, a mixing reaction cover 601, a second pipeline 70, a third pipeline 80, a shell 90, an air inlet 901 and an air outlet 902.

Detailed Description

Referring to fig. 1 to 3, an embodiment of the present invention provides a tail gas treatment apparatus in a chromium-containing heavy metal hazardous waste disposal process, including a dust purification device, an acid gas purification tank 20, and a sludge settling tank 30, wherein the dust purification device includes a settling and condensing tank 101 and a temporary storage tank 102 disposed below the settling and condensing tank 101 for collecting sludge, the bottom of the settling and condensing tank 101 is communicated with the top of the temporary storage tank 102, the bottom of the temporary storage tank 102 is provided with a sludge discharge port 1021, the sludge discharge port 1021 is communicated with the sludge settling tank 30 through a second pipeline 70, a sludge pump or a slurry pump is further disposed on the second pipeline 70 to pump the sludge in the tank 102 into the sludge settling tank 30, the top of the acid gas purification tank 20 is provided with a purified gas outlet 202, the bottom of the acid gas purification tank 20 is provided with a sewage discharge port 203, the sewage discharge port 203 is communicated with the sludge settling tank 30 through a third pipeline 80, the settling and condensing tank 101 comprises a condensing and dust-removing chamber 1011 and a premixing chamber 1012 arranged below the condensing and dust-removing chamber 1011, a flue gas outlet 10111 is arranged at the top of the condensing and dust-removing chamber 1011, the flue gas outlet 10111 is communicated with the acid gas purification tank 20 through a first pipeline 60, the outlet end of the first pipeline 60 extends to a position below the liquid level in the acid gas purification tank 20, the bottom of the condensing and dust-removing chamber 1011 is communicated with the top of the premixing chamber 1012, the bottom of the premixing chamber 1012 is communicated with the top of the temporary storage tank 102, an air inlet pipe 1013 is arranged at the lower part of the premixing chamber 1012, the air inlet pipe 1013 is arranged in a shape like a Chinese character 'ren', the air inlet pipe 1013 comprises a steam pipeline 10131 and a tail gas pipeline 10132, the outlet end of the tail gas pipeline 10132 is communicated with the steam.

The upper part of the premixing chamber 1012 is fixedly provided with a smoke collecting mechanism 1014, the smoke collecting mechanism 1014 comprises a smoke collecting hood 10141, a draft tube 10142 and a blocking cap 10143, the smoke collecting hood 10141 is horizontally and fixedly arranged at the outlet end of the premixing chamber 1012, a round hole is arranged in the middle of the top of the smoke collecting hood 10141, the draft tube 10142 penetrates through the round hole and is vertically and fixedly arranged above the smoke collecting hood 10141, and the blocking cap 10143 is fixedly arranged at one end of the draft tube 10142 far away from the smoke collecting hood 10141. The fume collecting cover 10141 is tapered, and the diameter of the fume collecting cover 10141 is 3/4 of the inside diameter of the premixing chamber 1012. The top and the bottom of the blocking cap 10143 are both in a round platform shape. One part of mixture of the smoke and the steam flows upwards from a gap between the smoke collecting cover 10141 and the premixing chamber 1012, the other part of mixture of the smoke and the steam flows upwards along the draft tube 10142 due to the blocking of the smoke collecting cover 10141, at the moment, the flow speed of the mixture of the smoke and the steam is accelerated under the action of the draft tube 10142, the mixture of the smoke and the steam impacts the blocking cap 10143, the other part of mixture of the smoke and the steam is scattered, and the mixture of the smoke and the steam flowing upwards from the gap between the smoke collecting cover 10141 and the premixing chamber 1012 continuously impacts the mixture of the smoke and the steam and is fully mixed with the mixture.

The outer part of the condensation dust chamber 1011 is provided with a shell 90, a cavity is formed between the shell 90 and the condensation dust chamber 1011, the upper part of the cavity is provided with an air inlet 901, and the lower part of the cavity is provided with an air outlet 902. The cold air is introduced into the cavity from the air inlet 901, so that the temperature of the condensation dust removal chamber 1011 is lower than the condensation temperature of the steam, and thus the mixture of the flue gas and the steam can be settled in the condensation dust removal chamber 1011, and the dust in the flue gas can be purified.

The outlet end of the first pipeline 60 is fixedly provided with a mixing reaction cover 601, one end of the mixing reaction cover 601 is open, and the other end of the mixing reaction cover is communicated with the outlet end of the first pipeline 60. The side wall of the mixing reaction cover 601 is provided with a strip-shaped hole. Mix reaction cover 601 infiltration to the liquid level below, can make the flue gas and the abundant contact of solution, during gas enters into the solution simultaneously, can stir solution, the flue gas can be with the abundant contact reaction of solution this moment, from being favorable to more purifying the acid gas in the flue gas.

The inside of the acid gas purification tank 20 is fixedly provided with a gas baffle 201, the gas baffle 201 is horizontally arranged, the gas baffle 201 is positioned above the liquid level in the acid gas purification tank 20, and the distance between the gas baffle 201 and the liquid level is 50 cm-100 cm. The gas baffle 201 is provided with gas leakage holes. Through the gas baffle 201 that sets up, make and form a cavity between gas baffle 201 and the liquid level, can make the flue gas buffer memory in this cavity to increase the contact time of flue gas and solution, be favorable to the purification to the flue gas, and the gas leakage hole on the gas baffle 201 can make the gas outgoing after the purification, and then discharges from purifying gas outlet 202.

Further, the device also comprises a gas dryer 40 and a dust collector 50, wherein the inlet end of the gas dryer 40 is communicated with the purified gas outlet 202 through a pipeline, and the outlet end of the gas dryer 40 is communicated with the dust collector 50 through a pipeline.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a chromium-containing heavy metal danger is useless and is dealt with tail gas treatment equipment in-process which characterized in that: the device comprises a dust purification device, an acid gas purification tank and a sludge sedimentation tank, wherein the dust purification device comprises a sedimentation condensation tank and a temporary storage tank which is arranged below the sedimentation condensation tank and used for collecting sludge, the bottom of the sedimentation condensation tank is communicated with the top of the temporary storage tank, the bottom of the temporary storage tank is provided with a sludge discharge port, the sludge discharge port is communicated with the sludge sedimentation tank through a second pipeline, the top of the acid gas purification tank is provided with a purified gas outlet, the bottom of the acid gas purification tank is provided with a sewage discharge port, the sewage discharge port is communicated with the sludge sedimentation tank through a third pipeline, the sedimentation condensation tank comprises a condensation dust chamber and a pre-mixing chamber arranged below the condensation dust chamber, the top of the condensation dust chamber is provided with a flue gas outlet, the flue gas outlet is communicated with the acid gas purification tank through a first pipeline, and the outlet end of the first pipeline extends to a position, the bottom of the condensation dust removal chamber is communicated with the top of the premixing chamber, the bottom of the premixing chamber is communicated with the top of the temporary storage tank, an air inlet pipe is arranged at the lower part of the premixing chamber and is arranged in a herringbone mode, the air inlet pipe comprises a steam pipeline and a tail gas pipeline, the outlet end of the tail gas pipeline is communicated with the steam pipeline, and the outlet end of the steam pipeline is communicated with the inside of the premixing chamber.

2. The tail gas treatment equipment in the chromium-containing heavy metal hazardous waste disposal process according to claim 1, characterized in that: the upper portion of premixing room is fixed to be provided with and gathers cigarette mechanism, gathers cigarette mechanism and includes collection petticoat pipe, drainage tube, blocks the cap, and collection petticoat pipe level is fixed to be set up in the exit end of premixing room, and the round hole has been seted up to the top intermediate position of collection petticoat pipe, and the drainage tube passes the round hole to the vertical fixation sets up in the top of collection petticoat pipe, blocks that the cap is fixed to be set up the one end of keeping away from collection pettic.

3. The tail gas treatment equipment in the chromium-containing heavy metal hazardous waste disposal process according to claim 2, characterized in that: the fume collecting hood is conical, and the diameter of the fume collecting hood is 3/4 of the inner diameter of the premixing chamber.

4. The tail gas treatment equipment in the chromium-containing heavy metal hazardous waste disposal process according to claim 2, characterized in that: the top and the bottom of the blocking cap are both in a round table shape.

5. The tail gas treatment equipment in the chromium-containing heavy metal hazardous waste disposal process according to claim 1, characterized in that: the condensation dust removal chamber is characterized in that a shell is arranged outside the condensation dust removal chamber, a cavity is formed between the shell and the condensation dust removal chamber, an air inlet is formed in the upper portion of the cavity, and an air outlet is formed in the lower portion of the cavity.

6. The tail gas treatment equipment in the chromium-containing heavy metal hazardous waste disposal process according to claim 1, characterized in that: the outlet end of the first pipeline is fixedly provided with a mixed reaction cover, one end of the mixed reaction cover is opened, and the other end of the mixed reaction cover is communicated with the outlet end of the first pipeline.

7. The tail gas treatment equipment in chromium-containing heavy metal dangerous waste disposal process according to claim 6, characterized in that: and the side wall of the mixing reaction cover is provided with a strip-shaped hole.

8. The tail gas treatment equipment in the chromium-containing heavy metal hazardous waste disposal process according to claim 1, characterized in that: the inside of acid gas purification jar is fixed and is provided with gas baffle, and gas baffle level sets up, and gas baffle is located the liquid level in the acid gas purification jar.

9. The tail gas treatment equipment in chromium-containing heavy metal hazardous waste disposal process according to claim 8, characterized in that: and the gas baffle is provided with a gas leakage hole.

10. The tail gas treatment equipment in the chromium-containing heavy metal hazardous waste disposal process according to claim 1, characterized in that: the device also comprises a gas dryer and a dust collector, wherein the inlet end of the gas dryer is communicated with the purified gas outlet through a pipeline, and the outlet end of the gas dryer is communicated with the dust collector through a pipeline.