Deodorization and smoke abatement device for tail gas

Abstract

The utility model provides a deodorization and smoke abatement device for tail gas. The deodorization and smoke abatement device comprises an air pipe and a spraying assembly. The air pipe is used for being connected with a tail gas discharge outlet so that tail gas can be guided into the air pipe. The spraying assembly is arranged on the pipe wall of the air pipe; wherein the spraying assembly comprises a plurality of spraying units arranged in the flowing direction of the tail gas of the air pipe, and the spraying units are used for disturbing tail gas flow and spraying liquid, so that deodorization and smoke abatement of the tail gas are achieved. According to the tail gas deodorization and smoke abatement device, the multiple sets of spraying units are arranged in the air pipe and used for disturbing tail gas flow and spraying liquid, and then tail gas deodorization and smoke abatement are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of tail gas treatment, and in particular to a device for removing odor and smoke from tail gas. Background Art

[0002] The air circulation system is one of the necessary equipment for air circulation, system heat exchange, and air cleaning and circulation in the thermal processing industry and large modern factories. It is also widely used in processing workshops that are prone to generate a lot of dust. Air circulation improves the air quality of the delivery room and reduces the occurrence of occupational diseases. Modern and large-scale papermaking workshops are typical thermal processing enterprises. In the drying department, the water-containing paper web passes through a large amount of steam drying cylinder moisture, and the dryness and humidity control and circulation of the screen pressing department also need to be controlled by the air circulation system. In addition, the dust in the papermaking workshop and the raw material preparation workshop also needs to be filtered and purified through air circulation.

[0003] In the papermaking industry, after the steam enters the papermaking workshop through the paper machine, a large amount of heat energy, steam containing foreign matter, etc. will continue to be added to the air system. Then, the large amount of heat energy mixed in the original air system will be recovered through the air circulation system through the heat recovery heat exchanger, and the remaining exhaust gas will be discharged to the outside with the air. In addition to the part of the hot steam that has not been completely recovered, the dust in the papermaking workshop is also discharged into the surrounding air with the exhaust gas. When the hot steam is released into the surrounding air, part of the steam quickly condenses into water vapor due to the change in temperature and pressure, forming an obvious "smoke curtain". This is also the most common "chimney" phenomenon in the papermaking workshop. Secondly, the exhaust gas takes away some of the papermaking chemicals, resulting in a pungent smell in some of the exhaust gas. In addition, the paper fibers dissolved in the steam are also released into the surrounding air with the exhaust gas, which brings great hidden dangers to environmental protection issues. How to reduce the odor of the exhaust gas and the smoke curtain phenomenon is a difficult problem that needs to be solved urgently.

[0004] At present, the common method of eliminating odor is to reduce the use of chemical agents, or to replace them with similar agents to solve the odor problem of exhaust gas. However, such methods only treat the symptoms and not the root cause, and the research and development direction of papermaking is also greatly limited. The commonly used method for dealing with smoke screens in actual applications is through secondary heating, which further heats the exhaust gas to make its condensation position away from the chimney outlet. Generally, the exhaust gas is further heated and gradually forms a smoke screen about 30m above the chimney outlet. However, this method only eliminates the "chimney" scene from the naked eye, and the original exhaust steam actually still enters the air again.

[0005] The exhaust gas in the air circulation system contains a large amount of air with odor and water vapor containing foreign matter, which is directly discharged into the surrounding air, causing environmental problems. At the same time, it has received a large number of complaints from residents and fines from the Environmental Protection Bureau. How to solve the "chimney" phenomenon formed by the odor in the exhaust gas and the water vapor in the exhaust gas, and fundamentally solve the odor and exhaust gas problems, is an issue that papermaking workshops urgently need to solve. Utility Model Content

[0006] The embodiment of the present application provides a device for deodorizing and eliminating smoke from exhaust gas, the device comprising:

[0007] An air duct, used to be connected to the exhaust port of the exhaust gas so as to guide the exhaust gas into the air duct;

[0008] A spray assembly is arranged on the wall of the air duct; wherein the spray assembly includes a plurality of spray units arranged along the flow direction of the exhaust gas in the air duct, and the plurality of spray units are used to disturb the exhaust gas flow and spray liquid, thereby achieving deodorization and smoke elimination of the exhaust gas.

[0009] The exhaust gas deodorization and smoke elimination device provided in the embodiment of the present application is configured by arranging multiple groups of spray units in the air duct, wherein the multiple groups of spray units are used to disturb the exhaust gas flow and spray liquid, thereby achieving deodorization and smoke elimination of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the exhaust gas deodorization and smoke elimination device of the present application;

[0012] Figure 2 yes Figure 1 A schematic diagram of the partial structure of the exhaust gas deodorization and smoke elimination device in the embodiment;

[0013] Figure 3 It is a partial structural schematic diagram of another embodiment of the deodorizing and smoke eliminating device of the present application;

[0014] Figure 4 It is a schematic diagram of the partial structure of the spray unit in the embodiment of the present application;

[0015] Figure 5 yes Figure 4 A schematic structural diagram of the spray unit in the embodiment from another perspective. DETAILED DESCRIPTION

[0016] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0017] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0018] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0019] The present application provides a device for removing odor and smoke from exhaust gas. Figure 1 and Figure 2 , Figure 1 It is a schematic diagram of the overall structure of an embodiment of the exhaust gas deodorization and smoke elimination device of the present application. Figure 2 yes Figure 1 Schematic diagram of the partial structure of the exhaust gas deodorization and smoke elimination device in the embodiment. The deodorization and smoke elimination device in the embodiment can be used in any equipment or factory building including papermaking that requires exhaust gas deodorization and smoke elimination. The deodorization and smoke elimination device 10 includes an air duct 100, a spray assembly 200, a connecting pipe 300 and a connecting frame 400.

[0020] Specifically, the air duct 100 is connected to the exhaust gas discharge port through the connecting pipe 300 to guide the exhaust gas into the air duct 100. The arrow in the figure indicates the direction of exhaust gas flow. The air duct 100 and the connecting pipe 300 are respectively connected to the connecting frame 400.

[0021] Optionally, the spray assembly 200 is arranged on the pipe wall of the air duct 100; wherein the spray assembly 200 includes a plurality of groups of spray units arranged along the exhaust gas flow direction of the air duct 100, and the plurality of groups of spray units are used to disturb the exhaust gas flow and spray liquid, thereby achieving deodorization and smoke elimination of the exhaust gas.

[0022] Please continue reading Figure 2 The spray assembly 200 in this embodiment includes a first spray unit 210 and a second spray unit 220 arranged in sequence along the exhaust gas flow direction of the air duct 100; the first spray unit 210 is used to spray compressed air toward the exhaust gas flow channel of the air duct 100 to disturb the air flow of the exhaust gas; the second spray unit 220 is used to spray liquid toward the disturbed exhaust gas in the air duct 100.

[0023] Optionally, the liquid sprayed by the second spray unit 220 in this embodiment is water with a temperature of 35-45°, and the water sprayed by the second spray unit 220 is in the form of mist, and the shape of the water mist is a cone.

[0024] The exhaust gas deodorization and smoke elimination device provided in the embodiment of the present application is configured by arranging multiple groups of spray units in the air duct, wherein the multiple groups of spray units are used to disturb the exhaust gas flow and spray liquid, thereby achieving deodorization and smoke elimination of the exhaust gas.

[0025] See also Figure 3 , Figure 3 It is a partial structural diagram of another embodiment of the deodorizing and smoke eliminating device of the present application. Different from the above-mentioned embodiment, the spray assembly 200 in this embodiment also includes a third spray unit 230 and a fourth spray unit 240. Among them, the first spray unit 210 is used to spray compressed air toward the exhaust gas flow channel of the air duct 100 to disturb the air flow of the exhaust gas; the second spray unit 220 is used to spray liquid toward the disturbed exhaust gas in the air duct 100, and the liquid sprayed by the second spray unit 220 is water, and the temperature is 35-45°. The water sprayed by the second spray unit 220 is mist, and the shape of the water mist is cone. Optionally, the second spray unit 220 in this embodiment includes two sub-spray units 221 and 222. By arranging two sub-spray units 221 and 222 in the direction of the exhaust gas flow channel, the area where the exhaust gas contacts the water mist can be larger, thereby obtaining a better spraying effect. In addition, spraying warm water can play a role in deodorization.

[0026] The third spray unit 230 is located downstream of the second spray unit 220 in the exhaust gas flow direction of the air duct 100, and the third spray unit is used to spray mist-like normal temperature water into the air duct to condense and eliminate smoke.

[0027] Optionally, the fourth spray unit 240 is located downstream of the third spray unit 230 in the exhaust gas flow direction of the air duct 100 , and the fourth spray unit is used to spray into the air duct 100 to form a water curtain, and the water curtain covers the cross section of the air duct 100 .

[0028] The principle of the spray assembly in this embodiment is as follows.

[0029] The first spray unit: compressed air turbulence area. The exhaust gas is generally discharged at a large flow rate and a fast flow rate, so the odor and water vapor contained in it are not easy to eliminate and treat. The gas in the exhaust gas flow is columnar, and the steam contained in the column needs to be dispersed by high-pressure compressed air. The exhaust gas turbulence is achieved by the conical compressed air, so that the exhaust gas enters the next area in an irregular state. The compressed air disturbance area can be increased according to the exhaust gas flow rate.

[0030] The second spray unit: atomized warm water deodorization area, which is composed of two groups of independent warm water mist sprays (in a cone shape). The middle and upper areas of this area are basically covered by atomized warm water. After the irregularly moving exhaust gas enters this area, the odor molecules contained in the exhaust gas are continuously dissolved in the surrounding warm water spray. The design of warm water spray is mainly that the higher the temperature of the solution, the higher the solubility of the solute. Therefore, the use of warm water (35-45°) spray can effectively improve the dissolution of odor molecules and realize the deodorization function of the device.

[0031] The third spray unit: the clean water spray condensation smoke elimination area is different from the atomized warm water deodorization area where the mist spray is in the middle and upper area. The mist area formed by the clean water spray in this area basically includes the entire longitudinal section of the deodorization and smoke elimination pipe (in a cone shape). The exhaust gas heated after passing through the atomized warm water deodorization area is basically evenly distributed in the longitudinal section of the pipe. At the same time, the atomized warm water also enters this area. After being cooled by the clean water spray, it drips to the bottom of the pipe and enters the water recovery device. The deodorized exhaust gas enters the clean water spray condensation smoke elimination area again after being adsorbed by the warm water area. The steam contained in the exhaust gas continues to condense under the condensation action of the clean water spray, and the condensed water also enters the water recovery device.

[0032] The fourth spray unit: fan-shaped spray reflow area, different from the above three types of cone or frustum design, the clean water spray in this area is fan-shaped, and the fan-shaped spray covers the entire longitudinal section. Its main function is to intercept the remaining tail gas, so that the tail gas is basically trapped in the clean water spray condensation and smoke elimination area, and only a small amount (10-15%) of the tail gas can be discharged into the surrounding air after treatment. The clean water sprayed by the fan-shaped spray also enters the recovery water pipeline along the pipe wall.

[0033] In order to ensure that the condensed water generated in the deodorization and smoke elimination device does not flow back into the air circulation system, the air duct 100 (the pipe section where the spray assembly 200 is set) is designed to be at a certain angle, with an inclination of 3-5° to the horizontal plane (the angle is too small and not marked in the figure), so that the spray liquid of the spray assembly 200 flows in the exhaust gas discharge direction.

[0034] Optionally, see Figure 3 The deodorizing and smoke eliminating device 10 in this embodiment further includes a liquid recovery device 500 , which is disposed on the bottom wall of the air duct 100 and is located downstream of the fourth spray unit 240 . The liquid recovery device 500 is used to recover the liquid sprayed by the spray assembly 200 .

[0035] Optionally, please also refer to Figure 4 and Figure 5 , Figure 4 is an enlarged schematic diagram of the local structure of the spray unit in the embodiment of the present application, Figure 5 yes Figure 4 A schematic structural diagram of the spray unit in the embodiment from another perspective, the spray unit 200 in the embodiment of the present application (taking the first spray unit as an example for explanation, other spray units may be similar thereto) includes a supply pipe 201 and a nozzle 202, wherein the supply pipe 201 is arranged along the inner wall of the air duct 100, and the nozzle 202 is connected to the supply pipe 201 and is used to spray compressed air or spray liquid into the air duct 100.

[0036] Please continue to read Figure 4 and Figure 5 The spray unit 200 in this embodiment also includes a connecting pipe 203, which passes through a side wall of the air duct 100, and the two ends of the connecting pipe 203 are respectively connected to the supply pipe 201 and an external supply device (liquid pump, fan, etc., not shown in the figure).

[0037] The supply pipe 201 may be welded on the inner wall of the air duct 100, with a bolt hole with internal thread welded on the surface, and the matching nozzle 202 is installed on the internal thread of the supply pipe 201. The air duct 100 has a hole opened on the top, and the connecting pipe 203 passes through the hole position for medium transmission of the supply pipe 201. The nozzle 202 may be a conical or fan-shaped nozzle according to different media, and different medium pressures may be selected according to the requirements of the coverage area.

[0038] The exhaust gas deodorization and smoke elimination device provided in the embodiment of the present application basically solves the "chimney" phenomenon formed by the odor in the exhaust gas and the water vapor in the exhaust gas after use, fundamentally solves the odor and exhaust gas problems, and improves the environmental complaints caused by exhaust gas emissions. At present, the odor adsorption rate of exhaust gas basically reaches about 80%, the total amount of released exhaust gas is reduced by about 85%-90%, and the exhaust part basically achieves no odor and no white smoke, and has achieved good working results in actual production.

[0039] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A device for removing odor and smoke from tail gas, characterized in that: The deodorizing and smoke eliminating device comprises: An air duct, used to be connected to the exhaust port of the exhaust gas so as to guide the exhaust gas into the air duct; A spray assembly is arranged on the wall of the air duct; wherein the spray assembly includes a plurality of spray units arranged along the flow direction of the exhaust gas in the air duct, and the plurality of spray units are used to disturb the exhaust gas flow and spray liquid, thereby achieving deodorization and smoke elimination of the exhaust gas.

2. The deodorizing and smoke eliminating device according to claim 1, characterized in that: The spray assembly includes a first spray unit and a second spray unit arranged in sequence along the exhaust gas flow direction of the air duct; the first spray unit is used to spray compressed air toward the exhaust gas flow channel of the air duct to disturb the airflow of the exhaust gas; the second spray unit is used to spray liquid toward the disturbed exhaust gas in the air duct.

3. The deodorizing and smoke eliminating device according to claim 2, characterized in that: The liquid sprayed by the second spray unit is water with a temperature of 35-45°.

4. The deodorizing and smoke eliminating device according to claim 3, characterized in that: The water sprayed by the second spray unit is in the form of mist, and the shape of the water mist is cone.

5. The deodorizing and smoke eliminating device according to claim 3, characterized in that: The spray assembly includes a third spray unit, which is located downstream of the second spray unit in the flow direction of the exhaust gas in the air duct, and is used to spray mist-like normal temperature water into the air duct.

6. The deodorizing and smoke eliminating device according to claim 5, characterized in that: The spray assembly includes a fourth spray unit, which is located downstream of the third spray unit in the exhaust gas flow direction of the air duct, and is used for spraying into the air duct to form a water curtain, and the water curtain covers the cross section of the air duct.

7. The deodorizing and smoke eliminating device according to claim 6, characterized in that: The deodorizing and smoke eliminating device further comprises a liquid recovery device, which is arranged on the bottom wall of the air duct and is located downstream of the fourth spray unit.

8. The deodorizing and smoke eliminating device according to claim 1, characterized in that: The air duct is provided with an inclination angle of 3-5° between the pipe section of the spray assembly and the horizontal plane, so that the spray liquid of the spray assembly flows toward the exhaust gas flow discharge direction.

9. The deodorizing and smoke eliminating device according to claim 1, characterized in that: The spray unit includes a supply pipe and a nozzle. The supply pipe is arranged along the inner wall of the air duct. The nozzle is connected to the supply pipe and is used to spray compressed air or spray liquid into the air duct.

10. The deodorizing and smoke eliminating device according to claim 9, characterized in that: The spray unit further includes a connecting pipe, which passes through a side wall of the air duct, and two ends of the connecting pipe are respectively connected to the supply pipe and an external supply device.

Images