CN112657275A - Wet deacidification and demisting device and method - Google Patents
Wet deacidification and demisting device and method Download PDFInfo
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- CN112657275A CN112657275A CN202011388161.4A CN202011388161A CN112657275A CN 112657275 A CN112657275 A CN 112657275A CN 202011388161 A CN202011388161 A CN 202011388161A CN 112657275 A CN112657275 A CN 112657275A
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- demisting
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Abstract
The invention provides a wet deacidification and demisting device which achieves a better separation effect with lower cost and lower energy consumption. The technical scheme of the invention is as follows: a wet deacidification defogging device, comprising: the urceolus, its characterized in that: the device also comprises an inner cylinder which is vertically arranged, wherein the inner cylinder is of a hollow cylindrical structure; the outer cylinder is of a volute type spiral cylindrical structure from top to bottom; the outer cylinder and the inner cylinder are independent from each other, and the bottom ends of the outer cylinder and the inner cylinder are respectively communicated with the inlet at the top end of the cylindrical fog droplet collecting hopper; the central section of the inner cylinder is provided with demisting fillers; the flue gas entry set up in the top of urceolus, exhanst gas outlet set up in the top of inner tube, the droplet collection mouth set up in the export of fog droplet collection fill bottom. Meanwhile, the invention also discloses a wet deacidification and demisting method.
Description
Technical Field
The invention relates to the technical field of incineration flue gas treatment, in particular to a wet deacidification and demisting device and a wet deacidification and demisting method.
Background
In the wet desulphurization process, when an absorption tower runs, washing liquid is easy to generate fog with the particle size of 10-60 microns when being sprayed, the fog contains moisture, and halogen ions, sulfuric acid, sulfate, sulfur dioxide and the like are dissolved in the washing liquid, and the fog can cause pollution, salt deposition and serious corrosion of a fan, a heat exchanger and a flue when reaching the downstream, so the wet desulphurization process puts forward a requirement for demisting on absorption equipment, and the purified gas needs to be demisted before leaving the absorption tower.
A defogging device for containing wet flue gas, the more wire mesh formula of using, baffling board formula, whirl board defroster at present. However, the wire mesh demister can separate general mist, but has the problems of easy blockage, short service cycle, large equipment investment and the like. The demister formed by baffle plates in various shapes has a complex structure and a poor separation effect. The whirl plate defroster is the same with the gaseous flow direction by the separation liquid drop, easily produces the secondary and smugglies secretly, reduces defogging efficiency to the pressure loss is big, and the energy consumption is higher.
Disclosure of Invention
In order to solve the problems of poor separation effect, high energy consumption and high cost of the existing demisting device, the invention provides a wet deacidification demisting device which achieves a better separation effect with lower cost and lower energy consumption. Meanwhile, the invention also discloses a wet deacidification and demisting method.
The technical scheme of the invention is as follows: a wet deacidification defogging device, comprising: the urceolus, its characterized in that: the device also comprises an inner cylinder which is vertically arranged, wherein the inner cylinder is of a hollow cylindrical structure; the outer cylinder is of a volute type spiral cylindrical structure from top to bottom; the outer cylinder and the inner cylinder are independent from each other, and the bottom ends of the outer cylinder and the inner cylinder are respectively communicated with the inlet at the top end of the cylindrical fog droplet collecting hopper; the central section of the inner cylinder is provided with demisting fillers; the flue gas entry set up in the top of urceolus, exhanst gas outlet set up in the top of inner tube, the droplet collection mouth set up in the export of fog droplet collection fill bottom.
It is further characterized in that:
the outer cylinder and the inner cylinder are coaxial, the inner wall of the outer cylinder is connected with the inner cylinder through a spiral partition plate from top to bottom, and a spiral downward volute type flow passage is formed together with the outer wall of the inner cylinder;
the defogging filler comprises: a baffle, or a tube bundle, or a wire mesh structure;
the flue gas inlet is connected with the outer cylinder in a tangential way along the circumference of the cross section;
the inner parts of the outer barrel and the inner barrel are respectively provided with a spraying and flushing system;
and a spirally downward guide plate is arranged in the spirally downward flow channel of the outer barrel.
A wet deacidification demisting method is characterized by comprising the following steps: comprises two-stage separation processes of centrifugal separation and inertial separation;
the first-stage separation process is used for carrying out gas-liquid separation and demisting on the basis of centrifugal force formed by a volute type spiral downward outer cylinder flow passage; the second-stage separation process is used for carrying out gas-liquid separation and demisting on the basis of the inertia force formed by the vertically upward channel of the inner cylinder;
wet flue gas passes through a volute type external cyclone channel from top to bottom to realize the rotating centrifugal gas-liquid separation of the first-stage separation process, and then enters the second-stage separation process from bottom to top from the middle of the bottom to perform gravity inertial gas-liquid separation; and a demisting filler is arranged in the second-stage separation process to further separate the flue gas treated by the first-stage separation process.
It is further characterized in that:
all the smoke flow surfaces in the first-stage separation process and the second-stage separation process are made of non-metallic anticorrosive materials;
the first-stage separation process and the second-stage separation process are respectively provided with a spraying and flushing system;
and the fog drops generated in the first-stage separation process and the second-stage separation process are collected and separated based on a fog drop collecting hopper at the bottom.
According to the wet deacidification demisting device, the first-stage separation process realized on the basis of the spiral outer cylinder based on the volute type aims at the fog drops with large particle size, the second-stage separation process realized on the basis of the inner cylinder aims at the fine fog drops, and the two-stage demisting process ensures that the fog drops mixed in wet flue gas can be effectively removed; the cyclone centrifugal separation demisting adopted in the first-stage separation process reduces the occurrence probability of salt deposition and blockage problems; the second-stage separation process mainly achieves the effect of deep demisting, salt deposition is reduced due to small load, and the probability of blockage is reduced; meanwhile, the device is an independent device, other systems do not need to be attached, the installation and the arrangement are convenient, and the technical scheme of the invention has low cost and is suitable for popularization and use.
Drawings
FIG. 1 is a perspective schematic view of a wet deacidification demisting apparatus;
fig. 2 is a schematic structural diagram of a wet deacidification demisting device in a top view.
Detailed Description
As shown in fig. 1, the wet deacidification demisting device of the present invention comprises: the outer cylinder 1 also comprises an inner cylinder 2 which is vertically arranged, and the inner cylinder 2 is a hollow cylindrical structure; as shown in fig. 2, the outer cylinder 1 has a spiral cylindrical structure of a volute type from top to bottom; in the embodiment, the outer cylinder 1 and the inner cylinder 2 are coaxial, the inner wall of the outer cylinder 1 is connected with the inner cylinder 2 through a spiral partition plate from top to bottom, and a spiral downward volute type flow channel is formed together with the outer wall of the inner cylinder 2; the arrangement of the outer barrel 1 and the inner barrel 2 in an integrated mode ensures that the defogging device occupies a small area and is low in cost.
The bodies of the outer cylinder 1 and the inner cylinder 2 are independent from each other, and the bottom ends of the outer cylinder 1 and the inner cylinder 2 are respectively communicated with the inlet at the top end of the cylindrical fog droplet collecting hopper 3; the center section of inner tube 2 sets up defogging filler 4, and defogging filler 4 includes: a baffle, or a tube bundle, or a wire mesh structure; the flue gas inlet 6 is tangentially connected with the outer barrel 1 along the circumference of the cross section of the barrel body of the outer barrel, so that the flue gas is ensured to enter the outer barrel 1 in the tangential direction and cannot collide with the inner wall of the outer barrel 1, and the entering speed of the flue gas is kept; a spirally downward guide plate 5 is arranged in a spirally downward flow channel of the outer barrel 1, so that the smoke can be smoothly guided to flow along the inner cavity of the outer barrel 1 to form a vortex; the smoke inlet 6 is arranged at the top end of the outer barrel 1, the smoke outlet 7 is arranged at the top end of the inner barrel 2, and the fog drop collecting port 8 is arranged at the outlet at the bottom end of the fog drop collecting hopper 3; the spraying and flushing systems (not marked in the figure) are respectively arranged in the outer barrel 1 and the inner barrel 2, and a continuous two-stage separation process ensures that a better separation effect can be obtained.
A wet deacidification demisting method based on a wet deacidification demisting device comprises a two-stage separation process; based on the spiral outer barrel 1 of the spiral shell type, the flow direction of the flue gas is guided to form a vortex, and a spiral downward spiral shell flow channel is used as a first-stage separation flow channel; a vertical passage from bottom to top is realized on the basis of the inner cylinder 2 arranged vertically upwards as a passage used by a second-stage separation process; the first-stage separation process is used for carrying out gas-liquid separation and demisting on the basis of centrifugal force formed by a volute type spiral downward outer cylinder flow passage; and the second-stage separation process is used for carrying out gas-liquid separation and demisting on the basis of the inertia force formed by the vertically upward channel of the inner cylinder.
Wet flue gas enters the volute type outer cylinder from the flue gas inlet 6 from the tangential direction of the outer cylinder 1, then spirally downwards, large-particle-size fog drops are separated from the flue gas under the centrifugal action in the advancing process, the fog drops are gathered on the inner wall of the volute type outer cylinder and flow downwards, and finally the fog drops enter the lower fog drop collecting hopper 3 from the outlet 9 of the outer cylinder 1 and are collected from the fog drop collecting opening 8; wet flue gas passes through a volute type external cyclone channel from top to bottom to realize rotary centrifugal gas-liquid separation in a first-stage separation process, and then enters a second-stage separation process from bottom to top from the middle of the bottom to perform gravity inertial gas-liquid separation; the gas outlet of the first-stage separation process is communicated with the flue gas inlet 6 of the second-stage separation process through a fog drop collecting hopper 3;
the mist entering the lower mist droplet collecting hopper 3 enters the inner cylinder from bottom to top along the inlet 10 at the bottom of the inner cylinder 2, passes through the demisting filler 4 midway, and after the micro mist droplets are gathered and enlarged at the section of the demisting filler 4, the micro mist droplets fall into the mist droplet collecting hopper 3 based on gravity factors and are collected from a mist droplet collecting port 8; all the smoke flow surfaces in the first-stage separation process and the second-stage separation process are made of non-metallic anti-corrosion materials, so that the service life of the device is prolonged; and a spraying and flushing system is respectively arranged in the first-stage separation process and the second-stage separation process, so that salt deposition and blockage are prevented.
After the technical scheme of the invention is used, the flue gas is demisted in two stages, so that the flue gas demisting device has a better demisting effect; meanwhile, compared with a wet electric demister, the wet electric demister has the advantages of higher cost and higher manufacturing cost; the device is an independent device, does not need to be attached to other systems, and is convenient to install and arrange; this device defogging volume proportion mainly concentrates on first order separation flow, and the whirl centrifugal separation defogging that first order separation flow adopted is difficult to become salt jam, and the defogging proportion that second order separation flow was undertaken is less, mainly plays the effect of degree of depth defogging, has reduced salt volume, has reduced the jam risk because of the load is little.
Claims (10)
1. A wet deacidification defogging device, comprising: the urceolus, its characterized in that: the device also comprises an inner cylinder which is vertically arranged, wherein the inner cylinder is of a hollow cylindrical structure; the outer cylinder is of a volute type spiral cylindrical structure from top to bottom; the outer cylinder and the inner cylinder are independent from each other, and the bottom ends of the outer cylinder and the inner cylinder are respectively communicated with the inlet at the top end of the cylindrical fog droplet collecting hopper; the central section of the inner cylinder is provided with demisting fillers; the flue gas entry set up in the top of urceolus, exhanst gas outlet set up in the top of inner tube, the droplet collection mouth set up in the export of fog droplet collection fill bottom.
2. The wet deacidification and demisting device according to claim 1, wherein: the outer cylinder and the inner cylinder are coaxial, the inner wall of the outer cylinder is connected with the inner cylinder through a spiral partition plate from top to bottom, and a spiral downward volute type flow passage is formed together with the outer wall of the inner cylinder.
3. The wet deacidification and demisting device according to claim 1, wherein: the defogging filler comprises: baffles, or tube bundles, or wire mesh structures.
4. The wet deacidification and demisting device according to claim 1, wherein: the flue gas inlet is connected with the outer barrel tangentially along the circumference of the cross section.
5. The wet deacidification and demisting device according to claim 1, wherein: and the inner parts of the outer barrel and the inner barrel are respectively provided with a spraying and flushing system.
6. The wet deacidification and demisting device according to claim 1, wherein: and a spirally downward guide plate is arranged in the spirally downward flow channel of the outer barrel.
7. A wet deacidification demisting method is characterized by comprising the following steps: comprises two-stage separation processes of centrifugal separation and inertial separation;
the first-stage separation process is used for carrying out gas-liquid separation and demisting on the basis of centrifugal force formed by a volute type spiral downward outer cylinder flow passage; the second-stage separation process is used for carrying out gas-liquid separation and demisting on the basis of the inertia force formed by the vertically upward channel of the inner cylinder;
wet flue gas passes through a volute type external cyclone channel from top to bottom to realize the rotating centrifugal gas-liquid separation of the first-stage separation process, and then enters the second-stage separation process from bottom to top from the middle of the bottom to perform gravity inertial gas-liquid separation; and a demisting filler is arranged in the second-stage separation process to further separate the flue gas treated by the first-stage separation process.
8. The wet deacidification and demisting method according to claim 7, wherein: all the smoke flow surfaces in the first-stage separation process and the second-stage separation process are made of non-metallic anti-corrosion materials.
9. The wet deacidification and demisting method according to claim 7, wherein: and the first-stage separation process and the second-stage separation process are respectively provided with a spraying and flushing system.
10. The wet deacidification and demisting method according to claim 7, wherein: and the fog drops generated in the first-stage separation process and the second-stage separation process are collected and separated based on a fog drop collecting hopper at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011388161.4A CN112657275A (en) | 2020-12-02 | 2020-12-02 | Wet deacidification and demisting device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011388161.4A CN112657275A (en) | 2020-12-02 | 2020-12-02 | Wet deacidification and demisting device and method |
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| CN112657275A true CN112657275A (en) | 2021-04-16 |
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| CN202011388161.4A Pending CN112657275A (en) | 2020-12-02 | 2020-12-02 | Wet deacidification and demisting device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113041720A (en) * | 2021-04-25 | 2021-06-29 | 扬州通扬化工设备有限公司 | Chemical tail gas water-oil three-phase separation method and three-phase automatic separator using same |
| CN114806648A (en) * | 2022-06-27 | 2022-07-29 | 山西阳煤化工机械（集团）有限公司 | Crude gas separator and crude gas separation method |
-
2020
- 2020-12-02 CN CN202011388161.4A patent/CN112657275A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113041720A (en) * | 2021-04-25 | 2021-06-29 | 扬州通扬化工设备有限公司 | Chemical tail gas water-oil three-phase separation method and three-phase automatic separator using same |
| CN114806648A (en) * | 2022-06-27 | 2022-07-29 | 山西阳煤化工机械（集团）有限公司 | Crude gas separator and crude gas separation method |
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