CN209917597U - Embedded combined downstream absorption tower with low energy consumption and high mass transfer efficiency - Google Patents
Embedded combined downstream absorption tower with low energy consumption and high mass transfer efficiency Download PDFInfo
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- CN209917597U CN209917597U CN201920574763.5U CN201920574763U CN209917597U CN 209917597 U CN209917597 U CN 209917597U CN 201920574763 U CN201920574763 U CN 201920574763U CN 209917597 U CN209917597 U CN 209917597U
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Abstract
The utility model discloses an embedded combined downstream absorption tower with low energy consumption and high mass transfer efficiency; comprises an internal spraying venturi tube, a washing circulating pump and an external cylinder; the inner spraying venturi tube is provided with a venturi contraction section, a venturi throat, an enlarged mass transfer section, a high-efficiency mass transfer section and a venturi outlet from top to bottom; a circulating liquid spiral nozzle is arranged in the venturi contraction section, corresponds to the upper part of the venturi throat, and is communicated with the washing circulating pump; the venturi constriction section forms the inlet port of VOC waste gas, spouts in the venturi embedding urceolus, and the inside below of outer barrel forms the circulation groove, and the top of circulation groove is provided with high-efficient whirl defroster, and the upper end of outer barrel forms up to standard purified gas outlet. The utility model is suitable for the treatment field of the national environmental protection VOC waste gas emission; the method is particularly suitable for: (1) pork processing enterprises, pork sausage processing enterprises and the like in the food processing industry; (2) the ink printing machine is used for paper heating and drying enterprises and the like after ink printing in the field of printing industry.
Description
Technical Field
The utility model relates to a VOC exhaust emission's improvement field, specifically embedded combination following current absorption tower of low energy consumption high-efficient mass transfer.
Background
With the rapid development of economy in China, the pollution of discharged atmosphere, sewage and waste solids to the surrounding environment is accompanied. The national environmental protection also gradually develops some relevant standards and policies for forcibly controlling the environmental pollution for various industries. Under the great urging of the huge and exuberant environmental pollution treatment, the traditional absorption tower has the following defects in use:
(1) the mass transfer airspeed of the traditional absorption tower is generally 2-3.5 m/s, 2-5 spraying layers are needed to reach the waste gas treatment standard, and each spraying layer needs a plurality of large-flow atomizing nozzles. The lower airspeed brings about a large diameter of the equipment cylinder. Several spraying layers and each layer is provided with a plurality of nozzles, and a plurality of pump machines with large flow rate must be equipped; these investment costs are not negligible.
(2) The traditional absorption tower is a counter-current process, and flue gas after being sprayed and absorbed with waste gas can be easily taken away by airflow. The conventional design in the tower cylinder body needs at least two layers of demisters or high-efficiency demisters with high investment cost, so that discharged flue gas is free of liquid foam or less in liquid foam.
(3) The traditional absorption tower has high equipment and large diameter, and the equipment arrangement of the device needs a certain size of field to meet the reasonable equipment arrangement requirement due to the fact that multiple circulating pumps are needed to be configured on multiple spraying layers. The method brings infinite trouble to enterprises with quite limited sites, and only high investment cost is needed to compensate the defects of the sites.
(4) The multi-layer spraying large-flow (each layer is 5-6 times higher than the novel tower) circulating pump also brings high power consumption operation cost for enterprises, and inevitably generates more maintenance and management cost.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to solve the above-mentioned deficiency, the utility model provides an embedded combination following current absorption tower of high-efficient mass transfer of low energy consumption here. The method is suitable for the treatment field of national environment-friendly VOC waste gas emission; the method is particularly suitable for: (1) pork processing enterprises, pork sausage processing enterprises and the like in the food processing industry; (2) the ink printing machine is used for paper heating and drying enterprises and the like after ink printing in the field of printing industry.
The utility model discloses a realize like this, construct the embedded combination following current absorption tower of the high-efficient mass transfer of a low energy consumption, its characterized in that: comprises an internal spraying venturi tube, a washing circulating pump, a rotational flow plate demister and an outer cylinder;
wherein, the inner spray venturi is provided with a venturi contraction section, a venturi throat, an enlarged mass transfer section, a high-efficiency mass transfer section and a venturi outlet from top to bottom; a circulating liquid spiral nozzle is arranged in the venturi contraction section, corresponds to the upper part of the venturi throat, and is communicated with the washing circulating pump;
the venturi constriction section forms the inlet port of VOC waste gas, spouts in the venturi embedding urceolus, and the inside below of outer barrel forms the circulation groove, and the below of venturi export forms gas-liquid gravity separation space, and the top of circulation groove is provided with high-efficient whirl defroster, and the upper end of outer barrel forms up to standard purified gas outlet.
According to the utility model relates to an embedded combination following current absorption tower of low energy consumption high-efficient mass transfer, its characterized in that: the high-efficiency cyclone demister is provided with a tangential flow channel.
According to the utility model relates to an embedded combination following current absorption tower of low energy consumption high-efficient mass transfer, its characterized in that: the upper part of the spraying venturi tube is mainly supported on the upper sealing head of the outer cylinder, and the lower section of the spraying venturi tube is connected with the inner cylinder wall of the high-efficiency rotational flow demister.
According to the utility model relates to an embedded combination following current absorption tower of low energy consumption high-efficient mass transfer, its characterized in that: the spray venturi, the outer cylinder, the circulating groove and the high-efficiency rotational flow demister are made of stainless steel, composite engineering plastics or plastic PVC.
The utility model has the advantages of as follows: the utility model provides an embedded combined downstream absorption tower with low energy consumption and high mass transfer efficiency through improvement, which is suitable for the treatment field of national environmental protection VOC waste gas emission; the method is particularly suitable for: (1) pork processing enterprises, pig farm processing enterprises and the like in the food processing industry; (2) the ink printing machine is used for paper heating and drying enterprises and the like after ink printing in the field of printing industry. The embedded combined forward flow absorption tower with low energy consumption and high-efficiency mass transfer comprises a spray venturi, a washing circulating pump and an outer barrel; compared with the traditional absorption tower, the novel combined absorption tower has the following advantages:
(1) efficient mass transfer of the novel absorption tower: absorbing and circulating liquid (prepared by different process formulas for treating different VOC gases) sprayed by a spiral nozzle arranged above a throat neck is impacted by high-speed (30-80 m/s) air flow from an inner-spraying venturi contraction pipe, so that after the absorbing and circulating liquid is atomized, the absorbing and circulating liquid can fully and efficiently transfer mass in a venturi expansion section, and even if the outlet of the venturi has the high-efficiency mass transfer speed of about-16 m/s, impurities such as organic macromolecules and the like in the VOC waste gas can be absorbed and washed by the circulating liquid.
(2) The first gas-liquid gravity separation does not need to increase any investment cost; the mixed gas-liquid fluid outside the straight section of the expanded outlet of the jet venturi forms the first gas-liquid gravity separation due to different specific gravities in a forward flow absorption mode from top to bottom without increasing any investment cost. The gas with light specific gravity moves upwards, and the liquid falls into the lower circulating groove.
(3) The high-efficiency single plate demister has a simple structure; the gas which goes upwards after the first gas-liquid separation passes through the outward tangential flow channel of the demisting plate, so that the gas flow rotates outwards with a great centrifugal force, and liquid drops which collide on the cylinder wall lose kinetic energy due to the fact that inertia of a liquid film in the gas flow is large, and the liquid film is separated from the gas. The cylinder wall above the demister needs to have a certain required straight section to prevent the separated liquid film on the cylinder wall from being secondarily entrained by the ascending air flow. The optimized structure size and reasonable technological parameters of the demister ensure that the demisting efficiency is 90-95%.
(4) The venturi tube enlarges the outlet pipeline of the tube, and replaces the middle blind plate of the rotational flow demisting plate; no matter how the process operation air quantity changes, after calculation, the size of the outlet pipeline of the venturi expanding pipe is larger than the certain required proportional size of the blind plate of the demister, the efficiency of the demister is improved, and meanwhile, the material of demister equipment is saved.
(5) The inner spray venturi tube is skillfully combined with the outer cylinder body, so that the equipment arrangement space is saved, and the process requirements can be met. The size between the outer cylinders is determined by the airspeed of the demister 2-3 m/s. This airspeed is equivalent to the airspeed of traditional absorption tower, but the straight section height of urceolus wall can shorten a lot, satisfies (0.1 ~ 1) and is many times than the difference between defroster urceolus diameter and the defroster blind plate, prevents to get rid of the liquid membrane height of climbing on the section of thick bamboo wall just enough because of centrifugal force. Meanwhile, the upper part of the venturi tube equipment is mainly supported on the upper end socket of the outer cylinder body, the lower section of the venturi tube equipment can be connected with the inner cylinder wall of the demister, and the venturi tube equipment is used for bearing part of the weight of the venturi tube equipment on the basis of not influencing the strength of the demister.
(6) The combined integrated equipment saves investment; the venturi, the cylinder, the demister and the lower section of the circulating tank can prepare different circulating liquids suitable for technological requirements according to different VOC waste gases, and the material selection of the combined equipment is different according to different requirements of the circulating liquids, such as stainless steel, composite engineering plastics, plastic PVC and the like.
A venturi tube for high-efficiency mass transfer is selected, and the technological size of the equipment is many times smaller than that of the traditional absorption tower.
And B, compared with a low-speed (2-3 m/s) baffling demister, the simple and efficient demisting plate can save one third of the cost.
(7) The liquid-gas ratio of the circulating liquid of the internal spraying venturi is (0.6-1.0L/m 3), so that the requirement of high-efficiency mass transfer can be met, and the power consumption of system operation is saved.
(8) The combined integrated equipment is particularly suitable for enterprises with quite short sites, and at most, the combined integrated equipment is one half of the floor area occupied by the traditional tower equipment.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a co-current absorption column of this patent;
FIG. 2 is a schematic diagram of an embodiment of a high-efficiency cyclone demister in the patent.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings 1-2, wherein the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides an embedded combined downstream absorption tower with low energy consumption and high mass transfer efficiency through improvement, which is suitable for the treatment field of national environmental protection VOC waste gas emission; the method is particularly suitable for: (1) pork processing enterprises, pork sausage processing enterprises and the like in the food processing industry; (2) the ink printing machine is used for paper heating and drying enterprises and the like after ink printing in the field of printing industry.
The embedded combined forward flow absorption tower with low energy consumption and high-efficiency mass transfer comprises an internal spraying venturi tube, a washing circulating pump 2 and an outer barrel 3;
wherein, the inner spray venturi is provided with a venturi contraction section 1A, a venturi throat 1B, an enlarged mass transfer section 1C, a high-efficiency mass transfer section 1D and a venturi outlet 1E from top to bottom; a circulating liquid spiral nozzle 4 is arranged in the venturi contraction section 1A, the circulating liquid spiral nozzle 4 corresponds to the upper part of the venturi throat 1B, and the circulating liquid spiral nozzle 4 is communicated with the washing circulating pump 2;
venturi constriction section 1A forms the inlet port of VOC waste gas, spouts in the venturi embedding outer barrel 3, and the inside below of outer barrel 3 forms circulation groove 5, and gas-liquid gravity separation space 6 is formed to the below of venturi export 1E, and the top of circulation groove 5 is provided with high-efficient whirl defroster 7, and the upper end of outer barrel 3 forms up to standard purified gas export 8.
Wherein, as shown in fig. 2, the high-efficiency cyclone demister 7 has a tangential flow channel.
The upper part of the spraying venturi tube is mainly supported on the upper sealing head of the outer cylinder, and the lower section of the spraying venturi tube is connected with the inner cylinder wall of the high-efficiency rotational flow demister 7.
The spray venturi, the outer cylinder 3, the circulating groove 5 and the high-efficiency rotational flow demister 7 can be made of stainless steel, composite engineering plastics or plastic PVC.
Compared with the traditional absorption tower, the novel combined absorption tower has the following advantages:
(1) efficient mass transfer of the novel absorption tower: absorbing and circulating liquid (prepared by different process formulas for treating different VOC gases) sprayed by a spiral nozzle arranged above a throat neck is impacted by high-speed (30-80 m/s) air flow from an inner-spraying venturi contraction pipe, so that after the absorbing and circulating liquid is atomized, the absorbing and circulating liquid can fully and efficiently transfer mass in a venturi expansion section, and even if the outlet of the venturi has the high-efficiency mass transfer speed of about-16 m/s, impurities such as organic macromolecules and the like in the VOC waste gas can be absorbed and washed by the circulating liquid.
(2) The first gas-liquid gravity separation does not need to increase any investment cost; the mixed gas-liquid fluid outside the straight section of the expanded outlet of the jet venturi forms the first gas-liquid gravity separation due to different specific gravities in a forward flow absorption mode from top to bottom without increasing any investment cost. The gas with light specific gravity moves upwards, and the liquid falls into the lower circulating groove.
(3) The high-efficiency single plate demister has a simple structure; the gas that goes up after first gas-liquid separation, because of the tangential runner of defogging board, it is outer to revolve the urgent trend of entering air current, and centrifugal force is big, and the liquid drop motion path is short, and the gas-liquid contact time quantum does benefit to the high-efficient defroster of dust removal defogging, and defogging efficiency 90% ~ 95%.
(4) The venturi tube enlarges the outlet pipeline of the tube, and replaces the middle blind plate of the rotational flow demisting plate; no matter how the process operation air quantity changes, after calculation, the size of the outlet pipeline of the venturi expanding pipe is larger than the certain required proportional size of the blind plate of the demister, the efficiency of the demister is improved, and meanwhile, the material of demister equipment is saved.
(5) The inner spray venturi tube is skillfully combined with the outer cylinder body, so that the equipment arrangement space is saved, and the process requirements can be met. The size between the outer cylinders is determined by the airspeed of the demister 2-3 m/s. This airspeed is equivalent to the airspeed of traditional absorption tower, but the straight section height of urceolus wall can shorten a lot, satisfies (0.1 ~ 1) and is many times than the difference between defroster urceolus diameter and the defroster blind plate, prevents to get rid of the liquid membrane height of climbing on the section of thick bamboo wall just enough because of centrifugal force. Meanwhile, the upper part of the venturi tube equipment is mainly supported on the upper end socket of the outer cylinder body, the lower section of the venturi tube equipment can be connected with the inner cylinder wall of the demister, and the venturi tube equipment is used for bearing part of the weight of the venturi tube equipment on the basis of not influencing the strength of the demister.
(6) The combined integrated equipment saves investment; the venturi, the cylinder, the demister and the lower section of the circulating tank can prepare different circulating liquids suitable for technological requirements according to different VOC waste gases, and the material selection of the combined equipment is different according to different requirements of the circulating liquids, such as stainless steel, composite engineering plastics, plastic PVC and the like.
A venturi tube for high-efficiency mass transfer is selected, and the technological size of the equipment is many times smaller than that of the traditional absorption tower.
And B, compared with a low-speed (2-3 m/s) baffling demister, the simple and efficient demisting plate can save one third of the cost.
(7) The liquid-gas ratio of the circulating liquid of the internal spraying venturi is (0.6-1.0L/m 3), so that the requirement of high-efficiency mass transfer can be met, and the power consumption of system operation is saved.
(8) The combined integrated equipment is particularly suitable for enterprises with quite short sites, and at most, the combined integrated equipment is one half of the floor area occupied by the traditional tower equipment.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. An embedded combined forward flow absorption tower with low energy consumption and high mass transfer efficiency is characterized in that: comprises an internal spraying venturi tube, a washing circulating pump (2), a whirl plate demister (7) and an outer cylinder (3);
wherein, the inner spray venturi is provided with a venturi contraction section (1A), a venturi throat (1B), an enlarged mass transfer section (1C), a high-efficiency mass transfer section (1D) and a venturi outlet (1E) from top to bottom; a circulating liquid spiral nozzle (4) is arranged in the venturi contraction section (1A), the circulating liquid spiral nozzle (4) corresponds to the upper part of the venturi throat (1B), and the circulating liquid spiral nozzle (4) is communicated with the washing circulating pump (2);
the venturi contraction section (1A) forms an inlet of VOC waste gas, the spray venturi is embedded into the outer barrel (3), a circulation groove (5) is formed below the inner part of the outer barrel (3), a gas-liquid gravity separation space (6) is formed below the venturi outlet (1E), a high-efficiency cyclone plate demister (7) is arranged above the circulation groove (5), and an up-to-standard purified gas outlet (8) is formed at the upper end of the outer barrel (3).
2. The embedded combined concurrent absorption tower with low energy consumption and high mass transfer efficiency according to claim 1, wherein: the high-efficiency swirl plate demister (7) is provided with a tangential flow channel.
3. The embedded combined concurrent absorption tower with low energy consumption and high mass transfer efficiency according to claim 1, wherein: the upper part of the self weight of the spray venturi is mainly supported on the upper sealing head of the outer cylinder, and the lower section of the spray venturi is connected with the inner cylinder wall of the high-efficiency rotational flow plate demister (7).
4. The embedded combined concurrent absorption tower with low energy consumption and high mass transfer efficiency according to claim 1, wherein: the spray venturi, the outer cylinder (3), the circulating groove (5) and the high-efficiency rotational flow plate demister (7) are made of stainless steel, composite engineering plastics or plastic PVC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920574763.5U CN209917597U (en) | 2019-04-25 | 2019-04-25 | Embedded combined downstream absorption tower with low energy consumption and high mass transfer efficiency |
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| CN201920574763.5U CN209917597U (en) | 2019-04-25 | 2019-04-25 | Embedded combined downstream absorption tower with low energy consumption and high mass transfer efficiency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701429A (en) * | 2020-07-03 | 2020-09-25 | 中冶焦耐(大连)工程技术有限公司 | Stabilizer tail gas purification device |
| CN114225606A (en) * | 2020-09-09 | 2022-03-25 | 财团法人工业技术研究院 | Particulate trapping system |
-
2019
- 2019-04-25 CN CN201920574763.5U patent/CN209917597U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701429A (en) * | 2020-07-03 | 2020-09-25 | 中冶焦耐(大连)工程技术有限公司 | Stabilizer tail gas purification device |
| CN114225606A (en) * | 2020-09-09 | 2022-03-25 | 财团法人工业技术研究院 | Particulate trapping system |
| US11850606B2 (en) | 2020-09-09 | 2023-12-26 | Industrial Technology Research Institute | Particles capturing system |
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