Efficient heat exchange VOC waste gas concentration system

Abstract

The utility model discloses an efficient heat exchange VOC waste gas concentration system which comprises a filtering device, a zeolite rotating wheel device, a combustion furnace and an exhaust chimney which are communicated, a combustion chamber and a heat exchanger are arranged in the combustion furnace, the heat exchanger conducts heat exchange through heat in the combustion chamber, and the heat exchanger comprises heat exchange plates arranged at the top and the bottom; a plurality of heat exchange pipes are arranged in the middle of the heat exchange plate, gaps are formed between the heat exchange pipes at the top and the bottom and the heat exchange plate, baffle plates are arranged at the intersections of the heat exchange plates and the heat exchange pipes in front of flowing of high-temperature gas, and the baffle plates block the gaps to prevent the high-temperature gas from escaping from the gaps, so that heat loss is reduced, and the heat exchange effect is improved. And the fuel utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to organic waste gas purification treatment technical field especially, relates to a kind of high-efficiency heat exchange VOC waste gas concentration system. BACKGROUND

[0002] With the rapid development of domestic semiconductor industry, its large wind volume, low concentration VOC-containing waste gas treatment becomes focus;And due to the specific requirements of semiconductor industry to pressure stability, waste gas concentration treatment technology becomes the conventional VOC waste gas treatment technology of the industry.

[0003] In the related art, Chinese patent application No. 201820873194.X utility model patent discloses a waste gas concentration purification system, including filter device, zeolite runner, thermal oxidation combustion device, pipeline, fan and so on;The zeolite runner is provided with adsorption zone, cooling zone and desorption zone;The pipeline is divided into first air inlet pipe, first air inlet branch pipe, second air inlet pipe, second air inlet branch pipe and third air outlet branch pipe, which are respectively connected with filter device, adsorption zone, desorption zone, cooling zone, thermal oxidation combustion device;The first air inlet branch pipe connects the cooling zone and the filter device.

[0004] Although the above-mentioned waste gas concentration purification system can purify and treat large wind volume, low concentration organic waste gas, when passing through the heat exchange equipment inside the thermal oxidation combustion device, there is a gap of several centimeters between the heat exchange tubes above / below the heat exchange plate structure and the equipment plate, and there is heat escape, and the heat cannot be fully utilized between the heat exchange tubes. UTILITY MODEL CONTENT

[0005] In view of the problems in the related art, the present application discloses a high-efficiency heat exchange VOC waste gas concentration system, which solves the problem of heat escape caused by the gap between the top and bottom heat exchange plates and heat exchange tubes of the heat exchanger in the related art, and cannot fully utilize the heat.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A high-efficiency heat exchange VOC waste gas concentration system, comprising a filter device, the filter device is connected with a zeolite runner device through a pipeline, the zeolite runner device is connected with a combustion furnace and an exhaust chimney through a pipeline, the combustion furnace is provided with a combustion chamber, the combustion furnace is provided with a heat exchanger, the heat exchanger utilizes the heat in the combustion chamber for heat exchange, the heat exchanger comprises heat exchange plates arranged at the top and bottom, a plurality of heat exchange tubes are arranged in the middle of the heat exchange plates, the heat exchange tubes at the top and bottom are provided with a gap with the heat exchange plates, baffles are arranged at the intersection of the heat exchange plates and the heat exchange tubes in front of the high-temperature gas flow, the baffles block the gap to prevent high-temperature gas from escaping from the gap.

[0008] As a further scheme of the present application, the baffle is a three-section folding structure.

[0009] As a further scheme of the present application, the zeolite runner device comprises an adsorption zone, a cooling zone and a desorption zone, the adsorption zone is arranged in communication with the exhaust chimney through a communication pipeline;

[0010] The inlet end of the cooling zone is in communication with fresh air through a cooling air inlet pipeline, the outlet end of the cooling zone is in communication with the cooling air inlet of the heat exchanger through a cooling air outlet pipeline, the desorption air outlet of the heat exchanger is in communication with the inlet end of the desorption zone through a desorption air inlet pipeline, the outlet end of the desorption zone is in communication with the desorption air inlet of the heat exchanger through a desorption air outlet pipeline, and the desorption air enters the combustion chamber for combustion and purification after passing through the heat exchanger.

[0011] The inlet end of the combustion furnace is in communication with fuel and air, the combustion furnace comprises the combustion chamber and the heat exchanger in sequence, and the outlet end of the combustion furnace is in communication with the exhaust chimney.

[0012] As a further scheme of the present application, the heat exchanger comprises a first-stage exchanger and a second-stage exchanger in sequence, one end of the first-stage exchanger is in communication with the desorption air inlet, the other end of the first-stage exchanger is in communication with the combustion chamber, and the two ends of the second-stage exchanger are in communication with the cooling air inlet and the desorption air outlet, respectively.

[0013] As a further scheme of the present application, the first-stage exchanger comprises a plurality of groups of heat exchange groups arranged side by side, and adjacent heat exchange groups are connected in series through an air exchange chamber.

[0014] As a further scheme of the present application, the cooling air outlet pipeline and the desorption air inlet pipeline are in communication through an adjusting pipeline, the adjusting pipeline is provided with a first linkage valve, the first linkage valve is a proportional linkage valve, the first linkage valve is connected with a gas temperature signal in the desorption air inlet pipeline in control, and the first linkage valve automatically adjusts the opening degree according to the gas temperature in the desorption air inlet pipeline to introduce an appropriate amount of cooling air in the cooling air outlet pipeline for temperature adjustment.

[0015] As a further scheme of the present application, the desorption air outlet pipeline is provided with a second linkage valve, the second linkage valve is a proportional linkage valve, the second linkage valve is connected with a temperature signal in the combustion chamber in control, and the second linkage valve automatically adjusts the opening degree according to the temperature in the combustion chamber to introduce an appropriate amount of normal-temperature air for temperature adjustment.

[0016] In summary, the present application has the following beneficial effects:

[0017] The application discloses a high-efficiency heat exchange VOC waste gas concentration system, which comprises a filtering device, a zeolite rotating device, a combustion furnace and an exhaust chimney, the combustion furnace is internally provided with a combustion chamber and a heat exchanger, the heat exchanger exchanges heat by using the heat in the combustion chamber, the heat exchanger comprises heat exchange plates arranged at the top and the bottom, a plurality of heat exchange pipes are arranged in the middle of the heat exchange plates, the heat exchange pipes at the top and the bottom are provided with gaps from the heat exchange plates, baffles are arranged at the intersection of the heat exchange plates and the heat exchange pipes in front of the high-temperature gas flow, the baffles block the gaps to prevent the high-temperature gas from escaping from the gaps, heat loss is reduced, heat exchange effect is improved, and fuel utilization rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of the specification, illustrate embodiments of the application and are used to explain the application, but do not constitute a limitation on the application.

[0019] In the drawings:

[0020] Figure 1 It is a structural schematic diagram of the high-efficiency heat exchange VOC waste gas concentration system.

[0021] Figure 2 It is a front view structural schematic diagram of the heat exchanger in the high-efficiency heat exchange VOC waste gas concentration system.

[0022] Figure 3 It is a top view structural schematic diagram of the heat exchanger in the high-efficiency heat exchange VOC waste gas concentration system.

[0023] Figure 4 It is an enlarged structural schematic diagram of the baffle in the high-efficiency heat exchange VOC waste gas concentration system.

[0024] Legend of the drawing:

[0025] 1, filtering device; 2, zeolite rotating device; 3, combustion furnace; 4, exhaust chimney; 5, combustion chamber; 6, heat exchanger; 21, adsorption area; 22, cooling area; 23, desorption area; 61, heat exchange plate; 62, heat exchange pipe; 63, gap; 64, baffle; 71, cooling air inlet pipe; 72, cooling air outlet pipe; 73, cooling air inlet; 74, adjusting pipe; 75, first connecting rod valve; 81, desorption air outlet; 82, desorption air inlet pipe; 83, desorption air outlet pipe; 84, desorption air inlet; 85, second connecting rod valve; 91, first-stage exchanger; 92, second-stage exchanger; 93, heat exchange group; 94, air exchange chamber; DETAILED DESCRIPTION

[0026] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals represent like elements or similar elements, unless the context of the description dictates otherwise. The following description of exemplary embodiments is not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present embodiments as detailed in the appended claims.

[0027] It should be noted that all directional directions (such as up, down, left, right, front, back, etc.) in the embodiments are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional directions will also change accordingly.

[0028] In addition, the description such as "first", "second" and the like in the embodiments is only for the purpose of description, and is not intended to specifically indicate the order or sequence, nor to limit the present application, but only to distinguish components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0029] In order to further understand the content, characteristics and effects of the present application, the following embodiments are exemplified and described in detail as follows with reference to the accompanying drawings:

[0030] As shown in Figures 1-4 :

[0031] The high-efficiency heat exchange VOC waste gas concentration system comprises a filtering device 1, the filtering device 1 is communicated through a pipeline and provided with a zeolite rotating device 2, and the zeolite rotating device 2 is communicated with a combustion furnace 3 and an exhaust chimney 4 through pipelines.

[0032] The combustion furnace 3 is provided with a combustion chamber 5, and the combustion furnace 3 is provided with a heat exchanger 6, and the heat exchanger 6 exchanges heat by using the heat in the combustion chamber 5.

[0033] The heat exchanger 6 comprises heat exchange plates 61 arranged at the top and the bottom, a plurality of heat exchange pipes 62 are arranged in the middle of the heat exchange plates 61, the top and bottom heat exchange pipes 62 are provided with gaps 63 with the heat exchange plates 61, baffles 64 are arranged at the intersection of the heat exchange plates 61 and the heat exchange pipes 62 in front of the high-temperature gas flow, and the baffles 64 block the gaps 63 to prevent the high-temperature gas from escaping from the gaps 63.

[0034] The baffle plate 64 is a three-section folding structure.

[0035] The baffle plate 64 blocks the gap 63 to prevent high-temperature gas from escaping from the gap 63, reduces heat loss, increases heat exchange effect, and improves fuel utilization. Increasing the baffle plate 64 improves the heat exchange effect, and at the same time changes the direction of the hot gas without affecting the space required for thermal expansion deformation of the heat exchange tube 62.

[0036] In addition, the zeolite runner device 2 includes an adsorption zone 21, a cooling zone 22, and a desorption zone 23, and the adsorption zone 21 is connected to the exhaust chimney 4 through a communication pipe.

[0037] The inlet end of the cooling zone 22 is connected to the fresh air through a cooling air inlet pipe 71, the outlet end of the cooling zone 22 is connected to the cooling air inlet 73 of the heat exchanger 6 through a cooling air outlet pipe 72, the desorption air outlet 81 of the heat exchanger 6 is connected to the inlet end of the desorption zone 23 through a desorption air inlet pipe 82, and the outlet end of the desorption zone 23 is connected to the desorption air inlet 84 of the heat exchanger 6 through a desorption air outlet pipe 83. After the desorption air passes through the heat exchanger 6, it enters the combustion chamber 5 for combustion and purification.

[0038] The inlet end of the combustion furnace 3 is connected to the fuel and air, and the combustion furnace 3 is sequentially provided with the combustion chamber 5 and the heat exchanger 6. The outlet end of the combustion furnace 3 is connected to the exhaust chimney 4.

[0039] Preferably, the heat exchanger 6 sequentially includes a first-stage exchanger 91 and a second-stage exchanger 92, one end of the first-stage exchanger 91 is connected to the desorption air inlet 84, the other end of the first-stage exchanger 91 is connected to the combustion chamber 5, and the second-stage exchanger 92 is connected to the cooling air inlet 73 and the desorption air outlet 81 respectively. The first-stage exchanger 91 includes a plurality of heat exchange groups 93 arranged side by side, and adjacent heat exchange groups 93 are connected in series through an air exchange chamber 94.

[0040] The cooling air outlet pipe 72 and the desorption air inlet pipe 82 are connected through an adjusting pipe 74, and the adjusting pipe 74 is provided with a first connecting rod valve 75. The first connecting rod valve 75 is a proportional connecting rod valve, and the first connecting rod valve 75 is connected to the gas temperature signal in the desorption air inlet pipe 82. The first connecting rod valve 75 automatically adjusts the opening degree according to the gas temperature in the desorption air inlet pipe 82 to introduce an appropriate amount of cooling air in the cooling air outlet pipe 72 for temperature adjustment.

[0041] The second connecting rod valve 85 is provided on the desorption air outlet pipe 83, and is a proportional connecting rod valve. When the system is started, the second connecting rod valve 85 can introduce fresh air into the combustion chamber 5 for heating in the combustion furnace 3. The second connecting rod valve 85 is connected with the combustion chamber 5 through a temperature sensor to realize temperature signal control connection. The second connecting rod valve 85 automatically adjusts the opening degree to introduce appropriate amount of normal temperature air for temperature adjustment according to the temperature in the combustion chamber 5. When the temperature in the combustion chamber 5 is too high, the temperature signal is transmitted through the temperature sensor, and the second connecting rod valve 5 can be opened by an appropriate angle to introduce appropriate amount of normal temperature air to adjust the temperature of the combustion chamber 5.

[0042] In actual application,

[0043] The heat exchanger provided with the baffle 64 has a gas temperature after the first-stage exchanger 91 that is 22℃ higher than that of the heat exchanger without the baffle 64. The gas after heat exchange enters the combustion chamber 5, which can effectively reduce the heating temperature and thus reduce the energy consumption.

[0044] Similarly, the heat exchanger provided with the baffle 64 has a gas temperature after the second-stage exchanger 92 that is 1.97℃ higher than that of the heat exchanger without the baffle 64.

[0045] Moreover, the hot gas of the combustion chamber 5 after the first-stage exchanger 91 and the second-stage exchanger 92 has an outlet gas temperature that is 26.34℃ lower than that of the heat exchanger without the baffle 64.

[0046] When the organic waste gas passes through the primary filter device 1 and intercepts large particles of dust, the system enters the zeolite rotary device 2. When the waste gas passes through the adsorption zone 21 of the zeolite rotary device 2, the rotary device adsorbs the organic pollutants in the waste gas onto the rotary device, and the clean gas enters the exhaust chimney 4 through the secondary air blower and is discharged to the atmosphere.

[0047] A small part of the gas at the fresh air inlet or the waste gas passes through the cooling zone 22 of the rotary device to cool the rotary device, and then enters the second-stage exchanger 92 of the heat exchanger 6 through the cooling air outlet. The second-stage exchanger 92 heats the gas, which is blown to the desorption zone 23 of the rotary device through the desorption air outlet 81. The organic waste gas on the rotary device is desorbed at high temperature and is blown to the desorption air inlet 84 by the desorption air blower, enters the first heat exchange group 93 of the first-stage exchanger 91 through the first heat exchange group 93, and then enters the second heat exchange group 93 through the gas exchange chamber 94. After passing through the gas exchange chamber 94, the gas enters the third heat exchange group 93, and then enters the combustion chamber 5. The combustion chamber 5 oxidizes and burns the high-temperature waste gas, and the organic pollutants are converted into carbon dioxide and water. The clean gas is discharged to the atmosphere through the exhaust chimney 4.

[0048] Thus, the high-temperature gas generated by the combustion chamber 5 provides heat for the exhaust gas passing through the first-stage exchanger 91 and the second-stage exchanger 92 through the heat exchange pipe 62. When the high-temperature gas diffuses to the low-temperature area, it will preferentially pass through the place where the resistance is small. Therefore, without the baffle 64, the high-temperature gas will escape from the gap 63 at both ends, and cannot provide energy for the heat exchange pipe 62, thus resulting in an unsatisfactory heat exchange effect. After the baffle 64 is added at both ends, the high-temperature gas diffusing to both ends is blocked, so that it all passes through the heat exchange pipe 62.

[0049] At the same time, the three-section folding structure design also fully considers the deformation caused by the thermal expansion and contraction of the heat exchanger, so as to not affect the overall stability of the heat exchanger.

[0050] In summary, the system effectively improves the heat exchange effect of the heat exchanger, overcomes the shortcomings in the prior art, and has high utilization value in actual application.

[0051] Finally, it should be noted that: the above disclosure is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application. The scope of the present application is only limited by the appended claims.

Claims

1. A high-efficiency heat exchange VOC waste gas concentration system, comprising a filter device (1), wherein the filter device (1) is connected to a zeolite wheel device (2) through a pipeline, and the zeolite wheel device (2) is connected to a combustion furnace (3) and an exhaust chimney (4) through pipelines, characterized in that: The combustion furnace (3) is provided with a combustion chamber (5), and the combustion furnace (3) is provided with a heat exchanger (6) which exchanges heat with the combustion chamber (5), the heat exchanger (6) comprises heat exchange plates (61) arranged at the top and bottom, a plurality of heat exchange pipes (62) are arranged in the middle of the heat exchange plates (61), the heat exchange pipes (62) at the top and bottom are provided with gaps (63) with the heat exchange plates (61), baffles (64) are arranged at the intersection of the heat exchange plates (61) and the heat exchange pipes (62) in front of the high-temperature gas flow, and the baffles (64) block the gaps (63) to prevent high-temperature gas from escaping from the gaps (63).

2. The high-efficiency heat-exchange VOC exhaust gas concentration system according to claim 1, characterized in that: The baffle (64) is a three-section folding structure.

3. The high-efficiency heat-exchange VOC exhaust concentration system according to claim 1, characterized in that: The zeolite runner device (2) comprises an adsorption zone (21), a cooling zone (22) and a desorption zone (23), the adsorption zone (21) is communicated with the exhaust chimney (4) through a communication pipeline; The inlet end of the cooling zone (22) is communicated with fresh air through a cooling air inlet pipe (71), the outlet end of the cooling zone (22) is communicated with the cooling air inlet (73) of the heat exchanger (6) through a cooling air outlet pipe (72), the desorption air outlet (81) of the heat exchanger (6) is communicated with the inlet end of the desorption zone (23) through a desorption air inlet pipe (82), the outlet end of the desorption zone (23) is communicated with the desorption air inlet (84) of the heat exchanger (6) through a desorption air outlet pipe (83), and the desorption air enters the combustion chamber (5) for combustion and purification after passing through the heat exchanger (6); The inlet end of the combustion furnace (3) is communicated with fuel and air, the combustion furnace (3) is sequentially provided with the combustion chamber (5) and the heat exchanger (6), and the outlet end of the combustion furnace (3) is communicated with the exhaust chimney (4).

4. The high-efficiency heat-exchange VOC exhaust concentration system according to claim 3, characterized in that: The heat exchanger (6) comprises a first-stage exchanger (91) and a second-stage exchanger (92) in sequence, one end of the first-stage exchanger (91) is communicated with the desorption air inlet (84), the other end of the first-stage exchanger (91) is communicated with the combustion chamber (5), and the second-stage exchanger (92) is communicated with the cooling air inlet (73) and the desorption air outlet (81) at two ends respectively.

5. The high-efficiency heat-exchange VOC exhaust concentration system according to claim 4, characterized in that: The first-stage exchanger (91) comprises a plurality of groups of heat exchange groups (93) arranged side by side, and adjacent heat exchange groups (93) are connected in series through air exchange chambers (94).

6. The high-efficiency heat-exchange VOC exhaust concentration system according to claim 3, characterized in that: The cooling air outlet pipe (72) and the desorption air inlet pipe (82) are communicated through an adjusting pipe (74), the adjusting pipe (74) is provided with a first connecting rod valve (75), the first connecting rod valve (75) is a proportional connecting rod valve, the first connecting rod valve (75) is connected with the gas temperature signal in the desorption air inlet pipe (82) in a control mode, and the first connecting rod valve (75) automatically adjusts the opening degree according to the gas temperature in the desorption air inlet pipe (82) to introduce appropriate cooling air in the cooling air outlet pipe (72) for temperature adjustment.

7. The high-efficiency heat-exchange VOC exhaust concentration system according to claim 3, characterized in that: The desorption air outlet pipe (83) is provided with a second connecting rod valve (85), the second connecting rod valve (85) is a proportional connecting rod valve, the second connecting rod valve (85) is connected with a temperature signal in the combustion chamber (5) control, the second connecting rod valve (85) automatically adjusts the opening degree according to the temperature in the combustion chamber (5) and introduces appropriate normal temperature air to adjust the temperature.

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