Workshop exhaust treatment system

Abstract

The utility model discloses a workshop exhaust treatment system which comprises a steel belt waste gas treatment system, a reaction kettle and unloading waste gas treatment system, a first air mixing box, a polymerization demisting system, a flame arrester and an induced draft fan, and the steel belt waste gas treatment system and the reaction kettle and unloading waste gas treatment system are connected with the first air mixing box. The first air mixing box, the polymerization demisting system, the flame arrester and the induced draft fan are sequentially connected, the polymerization demisting system comprises an out-tower circulating pool, a circulating pump and a polymerization demisting tower, and a first-stage fine separator, a first-stage efficient polymerizer and a first-stage coarse separator are sequentially arranged in the polymerization demisting tower from top to bottom; according to the workshop exhaust treatment system, the polymerization demisting system is arranged in front of the flame arrester, the polymerization demisting system is arranged to be the polymerization demisting tower, and the first-stage fine separator, the first-stage efficient polymerizer and the first-stage coarse separator are arranged, so that resin particles in exhaust gas can be removed, and normal production of a factory area is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas emission, and more particularly to a workshop exhaust gas treatment system. Background Art

[0002] The current exhaust treatment system in the workshop is that the exhaust gases from the reactors and dischargers on the first to third floors are collected through collection pipes and then enter the ground-level stainless steel scrubber. The fourth floor houses four steel strip production lines, and the exhaust gases generated are collected by gas hoods and sent to the first-level scrubber on the roof. The exhaust gases from the first-level scrubber are then collected in the main pipeline and then enter the second-level scrubber on the roof. The exhaust gases from the stainless steel scrubber and the second-level scrubber first enter the ground-level air mixing box, where they are then collected and sent to the RTO for treatment via the polyester workshop's induced draft fan. However, because the exhaust gas contains sticky resin particles, the flame arrester at the front end of the induced draft fan can quickly become clogged, affecting normal production in the plant. Therefore, the exhaust treatment system needs to be optimized to ensure normal production. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a workshop exhaust treatment system, which sets a polymerization demisting system in front of the flame arrester, and sets the polymerization demisting system into a polymerization demisting tower, and is equipped with a first-level fine separator, a first-level high-efficiency polymerizer and a first-level coarse separator, so as to remove resin particles in the exhaust gas and ensure normal production of the factory.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A workshop exhaust treatment system includes a steel strip exhaust gas treatment system, a reactor and unloading exhaust gas treatment system, a first air mixing box, a polymerization demisting system, a flame arrester, and an induced draft fan, wherein the steel strip exhaust gas treatment system, the reactor and unloading exhaust gas treatment system are all connected to the first air mixing box, and the first air mixing box, the polymerization demisting system, the flame arrester, and the induced draft fan are connected in sequence;

[0006] The polymerization demisting system includes an external circulation pool, a circulation pump and a polymerization demisting tower. A first-level fine separator, a first-level high-efficiency polymerizer and a first-level coarse separator are sequentially arranged in the polymerization demisting tower from top to bottom, and the polymerization demisting tower is provided with several layers of sprayers. The air inlet of the polymerization demisting tower is connected to the first air mixing box, and the air outlet is connected to the flame arrester. Flushing water is provided in the external circulation pool of the tower. The circulation pump is respectively connected to an inlet pipe and an outlet pipe. The end of the inlet pipe away from the circulation pump is connected to the external circulation pool of the tower, and the end of the outlet pipe away from the circulation pump is connected to the sprayers on several layers respectively. A drain outlet is provided at the bottom of the polymerization demisting tower, and the drain outlet is connected to the external circulation pool of the tower.

[0007] Furthermore, the first-stage high-efficiency aggregater includes multiple cyclone devices, each of which includes at least two swirl blades, a central column and an outer cylinder. One end of the swirl blade is fixed to the central column, and the other end is fixed to the outer cylinder, so that a rotating airflow is formed when an airflow containing fine particles passes through the cyclone device, and the axes of the multiple cyclone devices are parallel to each other.

[0008] Furthermore, the steel strip waste gas treatment system includes several first-level washing towers and one second-level washing tower. The air inlets of the several first-level washing towers are respectively connected to the waste gas outlets of several steel strip production lines. The air outlets of the several first-level washing towers are connected in parallel to the air inlet of the second-level washing tower. The air outlet of the second-level washing tower is connected to the first air mixing box.

[0009] Furthermore, the reactor and unloading waste gas treatment system includes a second air mixing box and a stainless steel washing tower, the second air mixing box is connected to multiple waste gas exhaust ports, the air inlet of the stainless steel washing tower is connected to the air outlet of the second air mixing box, and the air outlet of the stainless steel washing tower is connected to the air inlet of the first air mixing box.

[0010] Furthermore, the sprayer is provided with four layers, and the four layers of sprayers are respectively located above the first-level fine separator, the first-level high-efficiency polymerizer and the first-level rough separator, and below the first-level rough separator.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] In the utility model, the polymerization demisting system is arranged in front of the flame arrester through the steel belt waste gas treatment system, the reactor and unloading waste gas treatment system, the first mixing box, the polymerization demisting system, the flame arrester and the induced draft fan, and the polymerization demisting system is arranged into a polymerization demisting tower, and a first-level fine separator, a first-level high-efficiency polymerizer and a first-level coarse separator are arranged in sequence from top to bottom in the polymerization demisting tower, so that resin particles in the waste gas can be removed to ensure the normal production of the plant area; and a set of circulating flushing water system is formed by arranging an external circulation pool, a circulating pump and a four-layer sprayer. After spraying and flushing, the slurry at the bottom of the tower is discharged to the external circulation pool of the tower, and is precipitated and stratified in the pool. The upper clear liquid is returned to the tower through the circulating pump for spraying and flushing. The dust particles deposited in the external circulation pool of the tower can be regularly cleaned without stopping the machine, and the equipment in the tower can be cleaned during the unified shutdown and maintenance period in the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0014] Figure 1 is a schematic diagram of a workshop exhaust treatment system;

[0015] Figure 2 is a schematic diagram of a polymer demisting system;

[0016] Figure 3 This is a schematic diagram of the installation of a first-stage fine separator, a first-stage high-efficiency polymerizer, and a first-stage rough separator;

[0017] Figure 4 It is a structural schematic diagram of a cyclone device;

[0018] Figure 5 This is a structural diagram of the first-stage fine separator.

[0019] The markings in the figure are: 101, first-stage washing tower; 102, second-stage washing tower; 201, second air mixing box; 202, stainless steel washing tower; 3, first air mixing box; 301, polymerization demister; 302, first-stage fine separator; 3021, fine separator blade; 303, first-stage high-efficiency polymerizer; 3031, central column; 3032, swirl blade; 3033, outer cylinder; 304, first-stage coarse separator; 305, circulation pump; 306, circulation pool outside the tower; 307, drain outlet; 308, sprinkler; 4, polymerization demister system; 5, flame arrester; 6, induced draft fan. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. In the description of this utility model, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0022] A workshop exhaust treatment system, such as Figure 1-2As shown, it includes a steel strip exhaust gas treatment system, a reactor and unloading exhaust gas treatment system, a first air mixing box 3, a polymerization demisting system 4, a flame arrester 5 and an induced draft fan 6. The steel strip exhaust gas treatment system, the reactor and unloading exhaust gas treatment system are all connected to the first air mixing box 3, and the first air mixing box 3, the polymerization demisting system 4, the flame arrester 5 and the induced draft fan 6 are connected in sequence;

[0023] The polymerization demisting system 4 includes an external circulation pool 306, a circulation pump 305 and a polymerization demisting tower 301. The polymerization demisting tower 301 is provided with a first-level fine separator 302, a first-level high-efficiency polymerizer 303 and a first-level coarse separator 304 from top to bottom, and the polymerization demisting tower 301 is provided with several layers of sprayers 308. The air inlet of the polymerization demisting tower 301 is connected to the first air mixing box 3, and the air outlet is connected to the flame arrester 5. Flushing water is provided in the external circulation pool 306, and the circulation pump 305 is respectively connected to an inlet pipe and an outlet pipe. The end of the inlet pipe away from the circulation pump 305 is connected to the external circulation pool 306, and the end of the outlet pipe away from the circulation pump 305 is connected to several layers of sprayers 308 respectively. A drain outlet 307 is provided at the bottom of the polymerization demisting tower 301, and the drain outlet 307 is connected to the external circulation pool 306.

[0024] Preferably, the first-stage high-efficiency aggregate 303 includes multiple cyclone devices, and the cyclone device includes at least two swirl blades 3032, a central column 3031 and an outer cylinder 3033. One end of the swirl blade 3032 is fixed to the central column 3031, and the other end is fixed to the outer cylinder 3033, so that a rotating airflow is formed when the airflow containing fine particles passes through the cyclone device. The axes of the multiple cyclone devices are parallel to each other. Specifically, the first-stage high-efficiency aggregate 303 is an existing technology and can be directly adopted and used.

[0025] Preferably, the coarse separator uses streamlined blades (without hooks). The demisting channel formed by such blades has no flushing dead corners and can effectively prevent scaling caused by intercepting mist droplets and dust. After the flue gas carrying mist droplets and dust passes through the coarse separator, mist and dust droplets larger than 50 microns will be intercepted. The blade material is new reinforced polypropylene material, the blade spacing is arranged at 30mm, and the inclination angle of the separator is selected as 35° after calculation to achieve the best demisting effect.

[0026] Preferably, the fine separator in the utility model adopts the existing technology. The fine separator has better demisting performance than the coarse separator. The maximum droplet size that can be intercepted is as low as 13 to 14 microns. The spacing between the blades 3021 of the fine separator is generally designed to be 25 mm, and the layout adopts a twin structure, which effectively avoids the fine separator from tilting to one side after long-term operation, affecting the demisting efficiency.

[0027] Preferably, the steel strip waste gas treatment system includes several first-level washing towers 101 and one second-level washing tower 102, the air inlets of several first-level washing towers 101 are respectively connected to several steel strip production line waste gas outlets, the air outlets of several first-level washing towers 101 are connected in parallel to the air inlets of the second-level washing tower 102, and the air outlet of the second-level washing tower is connected to the first air mixing box 3.

[0028] Preferably, the reactor and unloading waste gas treatment system includes a second air mixing box 201 and a stainless steel washing tower 202, the second air mixing box 201 is connected to multiple waste gas exhaust ports, the air inlet of the stainless steel washing tower 202 is connected to the air outlet of the second air mixing box 201, and the air outlet of the stainless steel washing tower 202 is connected to the air inlet of the first air mixing box 3.

[0029] Preferably, the sprayers 308 are provided with four layers, and the four layers of sprayers 308 are respectively located above the first-level fine separator 302 , the first-level high-efficiency polymerizer 303 and the first-level rough separator 304 , and below the first-level rough separator 304 .

[0030] In the present invention, the polymerization demisting system 4 is arranged in front of the flame arrester 5 through the steel strip waste gas treatment system, the reactor and unloading waste gas treatment system, the first mixing box 3, the polymerization demisting system 4, the flame arrester 5 and the induced draft fan 6, and the polymerization demisting system 4 is arranged into a polymerization demisting tower 301, and a first-level fine separator 302, a first-level high-efficiency polymerizer 303 and a first-level coarse separator 304 are arranged in sequence from top to bottom in the polymerization demisting tower 301, so that resin particles in the waste gas can be removed to ensure normal production of the plant; and by arranging an external circulation pool 306, a circulation pump 305 and a four-layer sprayer 308, a set of circulating flushing water system is formed. After spraying and flushing, the slurry at the bottom of the tower is discharged to the external circulation pool 306, and precipitated and stratified in the pool. The upper clear liquid is returned to the tower through the circulation pump 305 for spraying and flushing. The dust particles deposited in the external circulation pool 306 can be regularly cleaned without stopping the machine, and the equipment in the tower can be cleaned during the unified shutdown and maintenance period in the factory.

[0031] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A workshop exhaust treatment system, characterized by: It includes a steel strip waste gas treatment system, a reactor and unloading waste gas treatment system, a first air mixing box, a polymerization demisting system, a flame arrester and an induced draft fan, wherein the steel strip waste gas treatment system, the reactor and unloading waste gas treatment system are all connected to the first air mixing box, and the first air mixing box, the polymerization demisting system, the flame arrester and the induced draft fan are connected in sequence; The polymerization demisting system includes an external circulation pool, a circulation pump and a polymerization demisting tower. A first-level fine separator, a first-level high-efficiency polymerizer and a first-level coarse separator are sequentially arranged in the polymerization demisting tower from top to bottom, and the polymerization demisting tower is provided with several layers of sprayers. The air inlet of the polymerization demisting tower is connected to the first air mixing box, and the air outlet is connected to the flame arrester. Flushing water is provided in the external circulation pool of the tower. The circulation pump is respectively connected to an inlet pipe and an outlet pipe. The end of the inlet pipe away from the circulation pump is connected to the external circulation pool of the tower, and the end of the outlet pipe away from the circulation pump is connected to the sprayers on several layers respectively. A drain outlet is provided at the bottom of the polymerization demisting tower, and the drain outlet is connected to the external circulation pool of the tower.

2. A workshop exhaust treatment system according to claim 1, characterized in that: The first-stage high-efficiency aggregater includes multiple cyclone devices, each of which includes at least two swirl blades, a central column, and an outer cylinder. One end of the swirl blade is fixed to the central column, and the other end is fixed to the outer cylinder, so that a rotating airflow is formed when an airflow containing fine particles passes through the cyclone device, and the axes of the multiple cyclone devices are parallel to each other.

3. A workshop exhaust treatment system according to claim 1, characterized in that: The steel strip waste gas treatment system includes several first-level washing towers and one second-level washing tower. The air inlets of the several first-level washing towers are respectively connected to the waste gas outlets of several steel strip production lines. The air outlets of the several first-level washing towers are connected in parallel to the air inlet of the second-level washing tower. The air outlet of the second-level washing tower is connected to the first air mixing box.

4. A workshop exhaust treatment system according to claim 1, characterized in that: The reactor and unloading waste gas treatment system includes a second air mixing box and a stainless steel washing tower. The second air mixing box is connected to multiple waste gas exhaust ports. The air inlet of the stainless steel washing tower is connected to the air outlet of the second air mixing box. The air outlet of the stainless steel washing tower is connected to the air inlet of the first air mixing box.

5. The workshop exhaust gas treatment system according to claim 1, characterized in that: The sprayers are provided with four layers, and the four layers of sprayers are respectively located above the first-level fine separator, the first-level high-efficiency polymerizer and the first-level rough separator, and below the first-level rough separator.

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