CN215311225U

CN215311225U - Tail gas purification recovery system

Info

Publication number: CN215311225U
Application number: CN202121675770.8U
Authority: CN
Inventors: 高益明; 周宇; 詹书田; 万焱明; 俞新平; 杨代萍; 徐国鸣
Original assignee: Hunan Hongrun Chemical Technology Co ltd
Current assignee: Hunan Hongrun Chemical Technology Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2021-12-28
Anticipated expiration: 2031-07-22

Abstract

The utility model discloses a tail gas purification and recovery system, which comprises a Venturi scrubber, a Venturi separator, a slurry pump, a slurry sedimentation tank, a spraying device, a cloth bag dust removal device, a material collection bin and a closed air unloader, wherein the Venturi scrubber is connected with the Venturi separator; the top of the Venturi scrubber is communicated with a tail gas inlet pipe, the bottom of the Venturi scrubber is communicated with the Venturi separator through an air inlet pipe, a spraying device is installed inside the Venturi separator, the bottom of the Venturi separator is communicated with a slurry pump through a slurry pipe, a slurry outlet pipe of the slurry pump is communicated with the Venturi scrubber, the slurry outlet pipe is communicated with a sedimentation tank inlet pipe, and a slurry sedimentation tank is installed below an outlet of the sedimentation tank inlet pipe; the top of the Venturi separator is communicated with a cloth bag dust removal device through an air outlet pipe, and the bottom of the cloth bag dust removal device is communicated with a material collecting bin; the utility model filters the tail gas for many times, and the filtered dust is recycled through the slurry sedimentation tank and the material collecting bin.

Description

Tail gas purification recovery system

Technical Field

The utility model belongs to the field of tail gas recovery in industrial production, and particularly relates to a tail gas purification and recovery system.

Background

Along with the continuous deepening of the industrialization degree, the safety problem of tail gas emission generated in the industrial production process is more and more emphasized by the nation, part of tail gas contains a large amount of dust particles, and the particles contained in the tail gas are often characterized by toxicity, fineness, difficult recovery and the like; traditional tail gas recovery device, the filtration mode is single, and the recovery degree of recycling is also not enough to easy jam after equipment operation a period, thereby lead to the clearance of shutting down, make production efficiency reduce, the cost increase.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model discloses a tail gas purification and recovery system.

The technical scheme of the utility model is as follows:

a tail gas purification and recovery system comprises a Venturi scrubber and a Venturi separator communicated with the Venturi scrubber, wherein the top of the Venturi scrubber is communicated with a tail gas inlet pipe, and the bottom of the Venturi scrubber is communicated with an air inlet pipe; an air inlet is formed in the middle of the venturi separator, the air inlet pipe is communicated with the air inlet, an air baffle plate is arranged above the air inlet and attached to the inner wall of the venturi separator, a plurality of air inlet holes are formed in the air baffle plate, and a spraying device is arranged at the upper parts of the air inlet holes; the bottom of the Venturi separator is communicated with a slurry pipe, the slurry pipe is communicated with a slurry pump, the slurry pump is communicated with a slurry outlet pipe, and the slurry outlet pipe is communicated with the Venturi scrubber; a slurry outlet pipe is communicated with a sedimentation tank inlet pipe, and a slurry sedimentation tank is arranged below the outlet of the sedimentation tank inlet pipe; venturi separator top intercommunication has the outlet duct, the outlet duct intercommunication has first sack cleaner and second sack cleaner, first sack cleaner and second sack cleaner top intercommunication have the blow-down pipe, first sack cleaner all communicates with second sack cleaner bottom has a plurality of unloading pipes, the unloading pipe intercommunication has the storehouse of gathering materials, it has the discharging pipe to gather materials storehouse bottom intercommunication.

In a further improvement, the spraying device comprises a water inlet pipe, and the lower part of the water inlet pipe is communicated with a plurality of sewer pipes; the air inlet is provided with a curved plate, an air outlet is formed in the curved plate, a spray head is transversely arranged in the curved plate, the sewer pipe penetrates through the curved plate and is communicated with the spray head, one end of the spray head is provided with a plurality of water outlet holes, and the water outlet holes face to the inner wall of the curved plate; the water inlet pipe is communicated with a variable-frequency water feeding pump outside the Venturi separator.

In a further improvement, the slurry pump comprises a first slurry pump and a second slurry pump, inlet pipes of the first slurry pump and the second slurry pump are communicated with a slurry pipe, an outlet pipe is communicated with a slurry outlet pipe, gate valves are arranged on the inlet pipes and the outlet pipes, and the first slurry pump and the second slurry pump are centrifugal pumps.

In a further improvement, the air outlet pipes communicated with the first bag-type dust collector and the second bag-type dust collector are respectively provided with a stop valve, and the lower parts of the first bag-type dust collector and the second bag-type dust collector are respectively communicated with a nitrogen back-blowing pipe.

According to the further improvement, the blanking pipe and the discharging pipe are both provided with knife-shaped valves, and air-closing unloading machines are mounted below the knife-shaped valves.

In a further improvement, a herringbone baffle is arranged at the lower part in the Venturi separator.

In a further improvement, the lower part of the material collecting bin is conical, and air hammers are arranged on two sides of the conical bin wall on the lower part of the material collecting bin.

In a further improvement, the slurry outlet pipe is communicated with an annular feeding pipe, and the annular feeding pipe is arranged at the reducing section of the Venturi scrubber.

The utility model has the advantages that:

according to the utility model, the tail gas is filtered for multiple times through the Venturi scrubber, the Venturi separator and the bag-type dust collector, so that the tail gas can be effectively purified to reach the emission standard; the arrangement of the slurry sedimentation tank and the material collection bin can effectively recover the filtered particle materials, so that the aim of saving cost is fulfilled; the slurry pump and the bag-type dust collector are both provided with two parallel connection devices, so that the cleaning can be switched under the condition of uninterrupted production, and the production efficiency is ensured.

Drawings

FIG. 1 is a schematic structural diagram of an overall exhaust gas purification and recovery system;

FIG. 2 is a schematic view of the structure of the annular feed pipe;

fig. 3 is a schematic structural diagram of the spraying device.

The specific implementation mode is as follows:

the utility model is further explained with reference to the drawings and the embodiments.

Example 1

The tail gas purification and recovery system shown in fig. 1, 2 and 3 is connected in the following manner:

a tail gas purification and recovery system comprises a Venturi scrubber 1, wherein the top of the Venturi scrubber 1 is communicated with a tail gas inlet pipe 2, and the bottom of the Venturi scrubber 1 is communicated with an air inlet pipe 11; an air inlet 12 is formed in the middle of the venturi separator 5, an air inlet pipe 11 is communicated with the air inlet 12, an air baffle plate 16 is arranged above the air inlet 12, a plurality of air inlet holes 29 are formed in the air baffle plate 16, a curved plate 19 is arranged on the air inlet holes 29, an air outlet 36 is formed in the curved plate 19, a spray head 21 is transversely arranged in the curved plate 19, a sewer pipe 20 penetrates through the curved plate 19 to be communicated with the spray head 21, a plurality of water outlet holes are formed in one end of the spray head 21, and the water outlet holes face to the inner wall of the curved plate 19; the water inlet pipe 17 communicated with the downcomer 20 is communicated with a variable frequency water feeding pump 15 outside the Venturi separator 5; the bottom of the Venturi separator 5 is communicated with a slurry pipe 14, the slurry pipe 14 is communicated with inlet pipes of a first slurry pump 10 and a second slurry pump 30, outlet pipes of the first slurry pump 10 and the second slurry pump 30 are communicated with a slurry outlet pipe 4, gate valves 31 are arranged on the inlet pipes and the outlet pipes, and the first slurry pump 10 and the second slurry pump 30 are centrifugal pumps; the slurry outlet pipe 4 is communicated with an annular feeding pipe 3, and the annular feeding pipe 3 is arranged at the reducing section of the Venturi scrubber 1; a slurry outlet pipe 4 is communicated with a sedimentation tank inlet pipe 8, a slurry sedimentation tank 9 is arranged below the outlet of the sedimentation tank inlet pipe 8, and the slurry outlet pipe 4 and the sedimentation tank inlet pipe 8 are both provided with regulating valves 7; the top of the Venturi separator 5 is communicated with an air outlet pipe 6, the air outlet pipe 6 is communicated with a first bag-type dust remover 18 and a second bag-type dust remover 24, the inlets of the first bag-type dust remover 18 and the second bag-type dust remover 24 are respectively provided with a stop valve 23, the tops of the first bag-type dust remover 18 and the second bag-type dust remover 24 are communicated with an exhaust pipe 32, the bottoms of the first bag-type dust remover 18 and the second bag-type dust remover 24 are respectively communicated with a plurality of blanking pipes 33, the lower parts of the first bag-type dust remover and the second bag-type dust remover are respectively communicated with a nitrogen back-blowing pipe 25, the blanking pipes 33 are communicated with a material collecting bin 34, and the bottom of the material collecting bin 34 is communicated with a material discharging pipe 35; the blanking pipe 33 and the discharging pipe 35 are both provided with a knife-shaped valve 28, and an air-closing unloader 26 is arranged below the knife-shaped valve 28; the lower part of the material collecting bin 34 is conical, and air hammers 27 are arranged on two sides of the conical lower part of the material collecting bin 34.

In this embodiment, an exhaust gas purification and recovery system has the following operation modes:

tail gas enters the venturi scrubber 1 through the tail gas inlet pipe 2 for primary filtration, then enters the venturi separator 5 for secondary filtration through a spraying device arranged in the venturi separator 5, the tail gas after secondary filtration enters the bag-type dust collector through the gas outlet pipe 6 at the top of the venturi separator 5 for third filtration, and the purified tail gas is discharged through the vent pipe 32; the bottom of the Venturi separator 5 is communicated with a first slurry pump 10 and a second slurry pump 30 which are connected in parallel, part of the slurry containing water enters a slurry sedimentation tank 9 through the slurry pumps, and the other part of the slurry enters the Venturi scrubber 1 through the annular feeding pipe 3 to be used as make-up water; the slurry in the slurry sedimentation tank 9 is precipitated to realize solid-liquid separation, and can be recycled; a herringbone baffle 13 is arranged in the venturi separator 5, so that slurry at the bottom of the venturi separator 5 can be effectively prevented from being blocked; the nitrogen back-blowing pipe 25 at the bottom of the bag-type dust collector and the air-closed unloading machine 26 arranged on the unloading pipe 33 can effectively prevent the equipment from being blocked when solid particle materials are transported; the solid particle materials collected in the collecting bin 34 are bagged through the discharge pipe 35, and the air hammer 27 arranged on the collecting bin 34 prevents bottom blockage.

One first slurry pump 10 and one second slurry pump 30 which are connected in parallel are used when working normally, and are switched through a gate valve 31 when needing to be cleaned, so that the first slurry pump and the second slurry pump are detached and cleaned; one bag dust remover 18 and one bag dust remover 24 which are connected in parallel are used when working normally, and when the bag dust remover needs to be cleaned, one bag dust remover is cut off by closing the cut-off valve 23 and the knife-shaped valve 28 on the blanking pipe 33, and the bag dust removers are disassembled and cleaned; the regulating valve 7 controls the liquid levels of the Venturi separator 5 and the slurry sedimentation tank 9 through opening degrees.

The spraying device is provided with a transverse spray head 21, water sprayed from a water outlet hole enters an air inlet hole 29 through the impact refraction of the curved plate 19, and the impacted water is diffused into water mist, so that the contact area between the water mist and tail gas is increased, and the purification effect is improved; the water outlet hole can be set to be large in aperture to avoid blockage.

While embodiments of the utility model have been disclosed above, it is not limited to the applications set forth in the description and embodiments, which are fully applicable to various fields of endeavor for which the utility model is intended, and further modifications may readily be effected therein by those skilled in the art, without departing from the general concept defined by the claims and their equivalents, which are to be limited not to the specific details shown and described herein.

Claims

1. A tail gas purification and recovery system comprises a Venturi scrubber and a Venturi separator communicated with the Venturi scrubber, and is characterized in that the top of the Venturi scrubber is communicated with a tail gas inlet pipe, and the bottom of the Venturi scrubber is communicated with an air inlet pipe; an air inlet is formed in the middle of the venturi separator, the air inlet pipe is communicated with the air inlet, an air baffle plate is arranged above the air inlet and attached to the inner wall of the venturi separator, a plurality of air inlet holes are formed in the air baffle plate, and a spraying device is arranged at the upper parts of the air inlet holes; the bottom of the Venturi separator is communicated with a slurry pipe, the slurry pipe is communicated with a slurry pump, the slurry pump is communicated with a slurry outlet pipe, and the slurry outlet pipe is communicated with the Venturi scrubber; a slurry outlet pipe is communicated with a sedimentation tank inlet pipe, a slurry sedimentation tank is arranged below an outlet of the sedimentation tank inlet pipe, and the slurry outlet pipe and the sedimentation tank inlet pipe are both provided with regulating valves; venturi separator top intercommunication has the outlet duct, the outlet duct intercommunication has first sack cleaner and second sack cleaner, first sack cleaner and second sack cleaner top intercommunication have the blow-down pipe, first sack cleaner all communicates with second sack cleaner bottom has a plurality of unloading pipes, the unloading pipe intercommunication has the storehouse of gathering materials, it has the discharging pipe to gather materials storehouse bottom intercommunication.

2. The exhaust gas purifying and recycling system according to claim 1, wherein the spraying device comprises a water inlet pipe, and a plurality of sewer pipes are connected to the lower portion of the water inlet pipe; the air inlet is provided with a curved plate, an air outlet is formed in the curved plate, a spray head is transversely arranged in the curved plate, the sewer pipe penetrates through the curved plate and is communicated with the spray head, one end of the spray head is provided with a plurality of water outlet holes, and the water outlet holes face to the inner wall of the curved plate; the water inlet pipe is communicated with a variable-frequency water feeding pump outside the Venturi separator.

3. The exhaust gas purification and recovery system according to claim 1, wherein the slurry pump comprises a first slurry pump and a second slurry pump, the inlet pipes of the first slurry pump and the second slurry pump are communicated with the slurry pipe, the outlet pipe is communicated with the slurry outlet pipe, and the first slurry pump and the second slurry pump are arranged in parallel; gate valves are arranged on the inlet pipe and the outlet pipe, and the first slurry pump and the second slurry pump are centrifugal pumps.

4. The tail gas purifying and recycling system of claim 1, wherein the gas outlet pipes communicating the first bag-type dust collector and the second bag-type dust collector are respectively provided with a shut-off valve, and the lower parts of the first bag-type dust collector and the second bag-type dust collector are respectively communicated with a nitrogen back-blowing pipe.

5. The exhaust gas purifying and recycling system according to claim 1, wherein the blanking pipe and the discharging pipe are both provided with knife-shaped valves, and the air-tight unloader is arranged below the knife-shaped valves.

6. The exhaust gas purifying and recycling system according to claim 1, wherein a herringbone baffle is installed at the lower portion in the venturi separator.

7. The exhaust gas purifying and recycling system according to claim 1, wherein the lower portion of the collecting bin is tapered, and air hammers are installed on both sides of the tapered wall of the lower portion of the collecting bin.

8. The exhaust gas purification and recovery system according to claim 1, wherein the slurry outlet pipe is connected to a ring-shaped feed pipe, and the ring-shaped feed pipe is installed at a reduced diameter section of the venturi scrubber.