Tail gas pretreatment equipment for drying machine

Abstract

The utility model relates to the technical field of drying machine tail gas pretreatment, in particular to drying machine tail gas pretreatment equipment which comprises a dry-type dust removal barrel, a water film dust remover, a condenser and a gas-liquid separator, a gas inlet is formed in the bottom of one side of the gas-liquid separator, and the condenser is communicated with the gas inlet. A gas outlet is formed in the top of the other side of the gas-liquid separator and is communicated with the drying machine; a filtering assembly is arranged in the middle of the interior of the gas-liquid separator, and the filtering assembly is used for filtering foams or floating foams in wet gas entering from the gas inlet; a flow guide assembly is arranged in the liquid collection chamber and is used for guiding and draining the filtered liquid. Compared with the prior art, the gas-liquid separator has the advantages that the filtering assembly is arranged, foam and floating foam in wet gas are successfully removed, it is ensured that liquid enters the gas-liquid separator cleanly, and the treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dryer tail gas pretreatment, in particular to a dryer tail gas pretreatment device. Background Art

[0002] Dryer exhaust gas pretreatment equipment is a device used to treat the exhaust gas generated by the dryer. In industrial production, dryers are usually used to heat wet materials or products and evaporate their water to achieve the purpose of drying. However, the exhaust gas generated during the drying process usually contains water vapor and possible solid particles and chemicals. These exhaust gases need to be pretreated before they can be discharged or further treated. Dryer exhaust gas pretreatment equipment usually includes a series of components, such as dust removal devices, gas-liquid separators, coolers, etc., which are used to remove solid particles and other pollutants in the exhaust gas and condense or separate the water to purify the exhaust gas. In this way, the treated exhaust gas can be discharged into the environment more safely, or further treated to meet emission standards. The equipment for pretreating dryer exhaust gas is designed to protect the environment, improve production efficiency, and ensure compliance with relevant emission standards and regulatory requirements.

[0003] Traditional dryer exhaust gas pretreatment equipment usually only separates gas and liquid during the use of the gas-liquid separator, and cannot effectively remove foam and froth in the humid gas, resulting in the liquid entering the gas-liquid separator containing more impurities, affecting the subsequent treatment effect. At the same time, the liquid separated by the gas-liquid separator is usually a free fall on the way down, resulting in uneven distribution, which will cause excessive accumulation of liquid in some areas and relatively less in other areas, forming dead corners or chaotic flow, reducing the separation efficiency. In addition, if the movement path of the liquid fluid in the gas-liquid separator is not controlled, it will easily lead to excessive turbulence and resistance in the diversion process, which will not only reduce the diversion efficiency, but also affect the stable flow state of the liquid, thereby reducing the stability and reliability of the system. Utility Model Content

[0004] In view of this, the purpose of the utility model is to propose a dryer tail gas pretreatment device to solve the problem that the foam and froth in the humid gas cannot be effectively removed in the gas-liquid separator.

[0005] Based on the above purpose, the utility model provides a dryer exhaust gas pretreatment device, comprising: a dry dust removal bucket, a water film dust collector, a condenser and a gas-liquid separator, the dry dust removal bucket is arranged at the exhaust gas outlet of the dryer, the water film dust collector is connected with the dry dust removal bucket, the air outlet of the water film dust collector is connected with the condenser, an air inlet is arranged at the bottom of one side of the gas-liquid separator, the condenser is connected with the air inlet, an air outlet is arranged at the top of the other side of the gas-liquid separator, the air outlet is connected with the dryer, an induced draft fan is also arranged between the air outlet and the dryer to guide the drying wind force, a liquid outlet is arranged at the bottom of the gas-liquid separator, and the interior of the gas-liquid separator also includes a gas-liquid separation room and a liquid collection room;

[0006] A filter assembly is provided in the middle of the gas-liquid separator, and the filter assembly is used to filter the foam or froth in the humid gas entering from the air inlet, and the gas-liquid separation chamber and the liquid collection chamber are separated by the filter assembly;

[0007] A flow guiding component is arranged inside the liquid collecting room, and the flow guiding component is used for guiding and draining the filtered liquid.

[0008] Preferably, the filter assembly is configured as a wire mesh demister, which includes a support plate, a support block and a gas-liquid filter screen. The support plate and the support block are respectively embedded and installed inside the inner wall of the gas-liquid separator, and the gas-liquid filter screen is arranged above the support plate and the support block. A plurality of grid plates are arranged at the upper and lower ends of the gas-liquid filter screen, and a baffle is also arranged above the gas-liquid filter screen.

[0009] Preferably, the guide assembly includes two first guide plates and two second guide plates, and the two first guide plates and the two second guide plates are arranged opposite to each other up and down.

[0010] Preferably, the vapor-liquid filter screen is in close contact with the inner wall of the cylinder without any gap, and the vapor-liquid filter screen is laid flat and stacked crosswise when laid flat.

[0011] Preferably, the first guide plate is inclined from the inner wall position of the gas-liquid separator to the center position of the gas-liquid separator, and is arranged to be inclined downward, and the second guide plate is inclined from the inner wall position of the gas-liquid separator to the center position of the gas-liquid separator, and is arranged to be inclined upward, and the length of the second guide plate is greater than the length of the first guide plate.

[0012] Preferably, the upper surfaces of the first guide plate and the second guide plate are both arranged in a concave arc shape, and a guide net is arranged on a side of the second guide plate close to the gas-liquid separator.

[0013] Preferably, a baffle plate is fixedly installed at the connection point between the gas outlet and the inside of the gas-liquid separator, the baffle plate is arranged in an "L" shape, the bottom of the baffle plate is fixedly connected to the inner wall of the gas-liquid separator, and the top of the baffle plate is arranged in an opening shape.

[0014] Preferably, a top cover is movably installed on the top of the gas-liquid separator, and sealing blocks are provided at the relative positions of the top cover and the gas-liquid separator. The top cover and the gas-liquid separator are connected through the sealing blocks, and an overflow pipe is also provided on the top of the top cover.

[0015] Preferably, a base is fixedly mounted on the bottom end of the gas-liquid separator, and three supporting legs are arranged between the base and the gas-liquid separator to connect them.

[0016] Beneficial effects of the utility model:

[0017] 1. This type of dryer exhaust gas pretreatment equipment, by providing a filtering component, successfully removes foam and floating foam in the humid gas through the combination of a support plate, a support block and a gas-liquid filter, ensures that the liquid enters the gas-liquid separator cleanly, and improves the treatment effect. Secondly, the embedded installation of the support plate and the support block enables the wire mesh demister to be firmly fixed inside the gas-liquid separator, ensuring its normal operation and enhancing the stability and reliability of the equipment. Furthermore, the setting of the gas-liquid filter has a good filtering effect, and cooperates with a number of grid plates and baffles to effectively block large particles from entering the filter, thereby improving the filtering effect and performance. In addition, the increased diameter of the wire mesh demister ensures a close fit with the inner diameter of the cylinder, avoids gas bypassing the filter, and ensures the reliability of the treatment effect. Finally, the flat-laying and cross-stacked design of the gas-liquid filter makes the filter easy to clean and maintain, prolongs its service life, and reduces maintenance costs.

[0018] 2. This type of dryer exhaust gas pretreatment equipment is equipped with a guide component. The design of the first guide plate and the second guide plate optimizes the movement path of the liquid inside the guide component, ensures that the liquid is evenly distributed in the liquid collection room, avoids the formation of dead corners or chaotic flow, thereby improving the distribution and collection performance of the liquid. The inclined setting and length difference enable the liquid to be effectively controlled during the diversion process, reduces turbulence and resistance, improves the diversion efficiency, and also stabilizes the flow state of the liquid. The concave arc-shaped surface design effectively reduces the splashing of the liquid and maintains the cleanliness and safety of the working environment. The setting of the guide net further enhances the diversion effect, ensures that the liquid is effectively guided and controlled, and comprehensively improves the distribution and collection performance of the liquid in the liquid collection room, thereby enhancing the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the process of the utility model;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the planar structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 5 For this utility model Figure 4 The enlarged structural diagram at A in the middle;

[0025] Figure 6 It is a schematic diagram of the structure of the wire mesh demister of the utility model.

[0026] The markings in the figure are:

[0027] 1. Gas-liquid separator; 2. Base; 3. Air inlet; 4. Wire mesh demister; 5. Gas-liquid separation chamber; 6. Liquid collecting chamber; 7. Gas outlet; 8. Baffle plate; 9. Liquid outlet; 10. Top cover; 11. Overflow pipe; 12. Sealing block; 13. First guide plate; 14. Second guide plate; 15. Guide net; 16. Support plate; 17. Support block; 18. Grid plate; 19. Gas-liquid filter; 20. Baffle. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figures 1 to 6 As shown, the exhaust gas pretreatment equipment of the dryer includes a dry dust removal bucket, a water film dust collector, a condenser and a gas-liquid separator 1, characterized in that the dry dust removal bucket is arranged at the exhaust gas outlet of the dryer, the water film dust collector is connected to the dry dust removal bucket, the air outlet of the water film dust collector is connected to the condenser, an air inlet 3 is arranged at the bottom of one side of the gas-liquid separator 1, the condenser is connected to the air inlet 3, an air outlet 7 is arranged at the top of the other side of the gas-liquid separator 1, the air outlet 7 is connected to the dryer, and an induced draft fan is also arranged between the air outlet 7 and the dryer to guide the drying wind, and the gas-liquid The bottom end of the separator 1 is provided with a liquid outlet 9, and the interior of the gas-liquid separator 1 also includes a gas-liquid separation room 5 and a liquid collection room 6; a filter assembly is provided in the middle of the interior of the gas-liquid separator 1, and the filter assembly is used to filter the foam or froth in the humid gas entering from the air inlet 3, and the gas-liquid separation room 5 and the liquid collection room 6 are separated by the filter assembly; a flow guide assembly is provided inside the liquid collection room 6, and the flow guide assembly is used to guide and drain the filtered liquid. The bottom end of the gas-liquid separator 1 is also fixedly installed with a base 2, and three supporting legs are provided between the base 2 and the gas-liquid separator 1 to connect;

[0031] In the initial stage, the gas containing dust and moisture is sent to the dryer. In the dry dust removal barrel, large dust particles are initially removed by physical means, so that large dust particles in the gas are collected and separated, and small dust particles in the gas are further removed. When the gas passes through the water film dust collector, the small dust particles will contact the water film and be captured, thereby purifying the gas. Then the cooling medium, usually cold water or coolant, is contacted with the high-temperature exhaust gas to condense the moisture in the high-temperature exhaust gas into water. The condensed water is collected and discharged from the bottom, and the moisture in the exhaust gas is further collected. The exhaust gas passes through the gas-liquid separator 1, and the moisture is further separated and discharged from the bottom, thereby ensuring that the moisture in the exhaust gas reaches a lower level. Finally, the induced draft fan will pass through the treatment The processed gas is sent to the processing equipment or process of the next stage, thus forming a closed loop without exhaust gas discharge to the outside, and most of the dust in the exhaust gas returns to the dryer. When the gas-liquid separator 1 is in use, the foam or froth in the humid gas is filtered by the filtering component to prevent the foam or froth from entering the liquid collecting room 6 of the gas-liquid separator 1, thereby protecting the subsequent equipment from the influence of the foam or froth, improving the stability and reliability of the system, preventing the unfiltered liquid from entering the liquid collecting room 6, thereby improving the purity of the liquid, and the guide component is used to guide and drain the filtered liquid to ensure that the liquid falls normally in the liquid collecting room 6 and is effectively discharged, thereby improving the separation efficiency and liquid collecting performance of the gas-liquid separator 1.

[0032] like Figure 4 , Figure 6 As shown, the filter assembly is configured as a wire mesh demister 4, the wire mesh demister 4 includes a support plate 16, a support block 17 and a gas-liquid filter 19, the support plate 16 and the support block 17 are respectively embedded and installed inside the inner wall of the gas-liquid separator 1, the gas-liquid filter 19 is arranged above the support plate 16 and the support block 17, a plurality of grid plates 18 are arranged at both upper and lower ends of the gas-liquid filter 19, a baffle 20 is also arranged above the gas-liquid filter 19, the gas-liquid filter 19 is closely attached to the inner wall of the cylinder without any gap, the gas-liquid filter 19 is flatly laid, and is cross-stacked when flatly laid;

[0033] The wire mesh demister 4 is a filtering component, which includes a support plate 16, a support block 17 and a gas-liquid filter 19, which can effectively remove foam and floating foam in the humid gas. The setting of the gas-liquid filter 19 can intercept the foam and floating foam in the net, ensuring that the liquid entering the gas-liquid separator 1 is clean. The support plate 16 and the support block 17 are embedded and installed inside the inner wall of the gas-liquid separator 1, so that the wire mesh demister 4 can be firmly fixed inside the gas-liquid separator 1, and it is not easy to loosen or shift, thereby ensuring its normal operation. The gas-liquid filter 19 is arranged between the support plate 16 and the support block 17, and has a good filtering effect. The setting of several grid plates 18 can increase the support and stability of the filter. The setting of the baffle 20 can effectively prevent large particles from entering the filter, thereby improving the filtering effect. The gas-liquid filter 19 is flat and cross-stacked. This design makes the filter easy to clean and maintain, and at the same time extends its service life.

[0034] like Figure 3 , Figure 4 As shown, the guide assembly includes two first guide plates 13 and two second guide plates 14, the two first guide plates 13 and the two second guide plates 14 are arranged opposite to each other up and down, the first guide plate 13 is inclined from the inner wall position of the gas-liquid separator 1 to the center position of the gas-liquid separator 1, and is arranged to be inclined downward, the second guide plate 14 is inclined from the inner wall position of the gas-liquid separator 1 to the center position of the gas-liquid separator 1, and is arranged to be inclined upward, the length of the second guide plate 14 is greater than the length of the first guide plate 13, the upper surfaces of the first guide plate 13 and the second guide plate 14 are both arranged in a concave arc shape, and a guide net 15 is arranged on the side of the second guide plate 14 close to the gas-liquid separator 1;

[0035] The relative arrangement and inclination angle of the first guide plate 13 and the second guide plate 14 can guide the liquid evenly inside the guide assembly, ensure that the liquid is evenly distributed in the liquid collecting room 6, and prevent the liquid from forming a dead angle or chaotic flow in the liquid collecting room 6. The inclination of the first guide plate 13 and the second guide plate 14 makes the fluid smoother during the diversion process, reduces the turbulence and resistance of the liquid, and improves the efficiency of the diversion. The upper surfaces of the first guide plate 13 and the second guide plate 14 are arranged in an inwardly concave arc shape, which can effectively reduce the splashing of the liquid during the diversion process, avoid liquid overflow or splashing, and keep the working environment clean and safe. The diversion net 15 is arranged on the second guide plate 14 close to the On the side near the gas-liquid separator 1, the diversion effect can be further enhanced to ensure that the liquid is effectively guided and controlled during the diversion process, thereby improving the distribution and liquid collection performance of the liquid in the liquid collecting room 6. The relative arrangement of the first guide plate 13 and the second guide plate 14 can optimize the movement path of the fluid inside the diversion component, so that the fluid can flow smoothly without obstruction, thereby reducing the turbulence and resistance of the liquid and improving the diversion efficiency. The second guide plate 14 is longer and lower in position, so that the liquid passes through the second guide plate 14 for a longer time during the diversion process, which can effectively control the flow rate of the liquid and ensure that the liquid forms a more stable and uniform flow state in the liquid collecting room 6.

[0036] like Figure 5 As shown, a baffle plate 8 is fixedly installed at the connection point between the gas outlet 7 and the inside of the gas-liquid separator 1. The baffle plate 8 is arranged in an "L" shape. The bottom of the baffle plate 8 is fixedly connected to the inner wall of the gas-liquid separator 1, and the top of the baffle plate 8 is arranged in an opening shape;

[0037] The setting of the baffle plate 8 can effectively separate the gas and liquid, prevent the mixing of the gas and liquid at the connection point inside the gas-liquid separator 1, and ensure that the gas and liquid can be discharged through the gas outlet 7 and the liquid outlet 9 respectively. The baffle plate 8 is set in an "L" shape, and the upper part is set in an open shape, which can effectively prevent the liquid from backflowing into the gas outlet 7, avoid the liquid from entering the gas discharge pipeline, and protect the downstream equipment from liquid contamination.

[0038] like Figure 2 , Figure 3 As shown, a top cover 10 is movably installed at the top of the gas-liquid separator 1, and a sealing block 12 is provided at the relative position of the top cover 10 and the gas-liquid separator 1. The top cover 10 and the gas-liquid separator 1 are connected through the sealing block 12, and an overflow pipe 11 is also provided at the top of the top cover 10;

[0039] The setting of the sealing block 12 can ensure the sealing between the top cover 10 and the gas-liquid separator 1 to prevent gas or liquid leakage, which helps to maintain the pressure balance inside the gas-liquid separator 1 and prevent external impurities from entering. Through the setting of the sealing block 12, the top cover 10 is tightly connected to the gas-liquid separator 1 to prevent liquid or gas from overflowing, thereby protecting the cleanliness and safety of the internal environment of the gas-liquid separator 1. The setting of the overflow pipe 11 can release excess gas when the gas pressure is too high, avoiding equipment damage or safety hazards caused by gas overpressure, while ensuring the stable operation of the system.

[0040] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0041] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A dryer exhaust gas pretreatment device, comprising a dry dust removal bucket, a water film dust collector, a condenser and a gas-liquid separator (1), characterized in that: The dry dust removal bucket is arranged at the exhaust outlet of the dryer, the water film dust collector is connected to the dry dust removal bucket, the air outlet of the water film dust collector is connected to the condenser, an air inlet (3) is arranged at the bottom of one side of the gas-liquid separator (1), the condenser is connected to the air inlet (3), an air outlet (7) is arranged at the top of the other side of the gas-liquid separator (1), the air outlet (7) is connected to the dryer, an induced draft fan is also arranged between the air outlet (7) and the dryer to guide the drying wind, a liquid outlet (9) is arranged at the bottom of the gas-liquid separator (1), and the interior of the gas-liquid separator (1) also includes a gas-liquid separation room (5) and a liquid collection room (6); A filter assembly is provided in the middle of the interior of the gas-liquid separator (1), the filter assembly being used to filter foam or froth in the humid gas entering through the air inlet (3), and the gas-liquid separation chamber (5) and the liquid collection chamber (6) are separated by the filter assembly; A flow guide component is provided inside the liquid collection room (6), and the flow guide component is used to guide and drain the filtered liquid.

2. The dryer tail gas pretreatment equipment according to claim 1, characterized in that: The filter assembly is configured as a wire mesh demister (4), the wire mesh demister (4) comprising a support plate (16), a support block (17) and a gas-liquid filter (19), the support plate (16) and the support block (17) being respectively embedded and installed inside the inner wall of the gas-liquid separator (1), the gas-liquid filter (19) being arranged above the support plate (16) and the support block (17), a plurality of grid plates (18) being arranged at both upper and lower ends of the gas-liquid filter (19), and a baffle plate (20) being further arranged above the gas-liquid filter (19).

3. The dryer tail gas pretreatment equipment according to claim 1, characterized in that: The flow guide assembly comprises two first flow guide plates (13) and two second flow guide plates (14), wherein the two first flow guide plates (13) and the two second flow guide plates (14) are arranged opposite to each other in an upper and lower manner.

4. The dryer tail gas pretreatment equipment according to claim 2, characterized in that: The vapor-liquid filter screen (19) and the inner wall of the cylinder are in close contact with each other without any gap, and the vapor-liquid filter screen (19) is laid flat and stacked crosswise when laid flat.

5. The dryer tail gas pretreatment equipment according to claim 3, characterized in that: The first guide plate (13) is inclined from the inner wall position of the gas-liquid separator (1) to the center position of the gas-liquid separator (1), and is arranged to be inclined downward; the second guide plate (14) is inclined from the inner wall position of the gas-liquid separator (1) to the center position of the gas-liquid separator (1), and is arranged to be inclined upward; the length of the second guide plate (14) is greater than the length of the first guide plate (13).

6. The dryer tail gas pretreatment equipment according to claim 5, characterized in that: The upper surfaces of the first guide plate (13) and the second guide plate (14) are both arranged in a concave arc shape, and a guide net (15) is arranged on a side of the second guide plate (14) close to the gas-liquid separator (1).

7. The dryer tail gas pretreatment equipment according to claim 1, characterized in that: A baffle plate (8) is fixedly mounted at the connection point between the gas outlet (7) and the interior of the gas-liquid separator (1); the baffle plate (8) is arranged in an "L" shape; the bottom of the baffle plate (8) is fixedly connected to the inner wall of the gas-liquid separator (1); and the top of the baffle plate (8) is arranged in an open shape.

8. The dryer tail gas pretreatment equipment according to claim 1, characterized in that: A top cover (10) is also movably mounted on the top of the gas-liquid separator (1); a sealing block (12) is provided at a relative position between the top cover (10) and the gas-liquid separator (1); the top cover (10) and the gas-liquid separator (1) are connected via the sealing block (12); and an overflow pipe (11) is also provided at the top of the top cover (10).

9. The dryer tail gas pretreatment equipment according to claim 1, characterized in that: A base (2) is also fixedly mounted on the bottom end of the gas-liquid separator (1), and three supporting legs are arranged between the base (2) and the gas-liquid separator (1) to connect them.

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