Preheating device for VOC detection

Abstract

The utility model discloses a preheating device for VOC (volatile organic compound) detection, and particularly relates to the technical field of gas preheating, the preheating device comprises a bottom plate, the right part of a detection mechanism is fixedly connected with a gas transmission mechanism, the gas transmission mechanism is sleeved with a connecting pipe I, and the right end of the outer surface of the connecting pipe I is fixedly connected with a heating mechanism; the right part of the heating mechanism is fixedly connected with a second connecting pipe, the right part of the second VOC concentration detector is fixedly connected with an exhaust mechanism, and circulating mechanisms are symmetrically and fixedly connected to the outer front sides and the outer rear sides of the first connecting pipe and the exhaust mechanism. According to the preheating device for VOC detection disclosed by the utility model, VOC gas can be input and primarily detected under the action of the gas inlet mechanism and the detection mechanism, and the conveyed VOC gas can be fully preheated through the mutual matching of the gas conveying mechanism and the heating mechanism; meanwhile, under the action of the circulating mechanism, the VOC gas which is not fully preheated can be circularly heated again, so that the practicability and the universality of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas preheating, in particular to a preheating device for VOC detection. Background Art

[0002] VOC in the ordinary sense refers to volatile organic compounds. According to the definition of the World Health Organization, compounds with a boiling point of 50℃-250℃ under normal conditions are volatile organic compounds; but the definition in the environmental sense refers to a class of active volatile organic compounds, that is, the type of volatile organic compounds that can cause harm.

[0003] Chinese patent document CN206488290U discloses a pre-pyrolysis device for treating VOC gas, including a shell, wherein a pyrolysis gas channel is provided in the shell, a heating furnace for pyrolyzing VOC gas is provided in the pyrolysis gas channel, the heating furnace is connected to a heating pipe, the outlet of the heating pipe is connected to a preheating pipe, an electric heating wire is provided in the preheating pipe, the inlet end of the pyrolysis gas channel is connected to a waste gas recovery pipe, one end of the preheating pipe extends into the waste gas recovery pipe and then passes through the inner wall of the waste gas recovery pipe and extends to the outside, and the electric heating wire is also connected to a controller. The beneficial effects of the above patent document are: the VOC gas in the waste gas recovery pipe is heated by the preheating pipe, which saves energy; in addition, the waste heat discharged by the heating furnace is used to heat the waste gas recovery pipe, which further saves energy, and the electric heating wire is used for further heating when the discharged waste heat does not reach the specified temperature.

[0004] During the implementation process, the above patent document can heat the exhaust gas recovery pipe to achieve further energy-saving effect. If the discharged waste heat does not reach the specified temperature, an electric heating wire is used for further heating. However, it is impossible to perform multiple cycles of heating on the VOC gas that has not reached the specified temperature, resulting in the preheating effect of the VOC gas not being able to fully meet the specified standard, resulting in a poor preheating effect on the gas. Utility Model Content

[0005] The main purpose of the utility model is to provide a preheating device for VOC detection, which can effectively solve the problem that VOC gas that has not reached a specified temperature cannot be heated for multiple cycles.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A preheating device for VOC detection comprises a bottom plate, wherein an air intake mechanism is fixedly connected to the left upper portion of the outer surface of the bottom plate, a detection mechanism is fixedly connected to the right portion of the air intake mechanism, a gas delivery mechanism is fixedly connected to the right portion of the detection mechanism, a connecting pipe 1 is sleeved on the outside of the gas delivery mechanism, a left end of the outer surface of the connecting pipe 1 is fixedly connected to the right outer side of the detection mechanism, a heating mechanism is fixedly connected to the right end of the outer surface of the connecting pipe 1, a connecting pipe 2 is fixedly connected to the right end of the heating mechanism, a VOC concentration detector 2 is fixedly connected to the right end of the outer surface of the connecting pipe 2, an exhaust mechanism is fixedly connected to the right portion of the VOC concentration detector 2, a circulation mechanism is symmetrically fixedly connected to the connecting pipe 1 and the outer front side and the outer rear side of the exhaust mechanism, a support frame is fixedly connected to the outside of the two circulation mechanisms, and the lower end of the outer surface of the support frame is fixedly connected to the middle part of the upper end of the outer surface of the bottom plate.

[0008] Preferably, the air intake mechanism comprises a support sleeve column, an air intake pipe is sleeved in an upper inner cavity of the support sleeve column, and a flange is fixedly connected to the left end of the outer surface of the air intake pipe.

[0009] Preferably, the detection mechanism includes a VOC concentration detector 1, a plurality of shunt pipes are fixedly connected to the middle of the inner cavity of the VOC concentration detector 1, and the left end of the outer surface of the VOC concentration detector 1 is fixedly connected to the right end of the outer surface of the intake pipe.

[0010] Preferably, the gas delivery mechanism comprises a gas collecting pipe, the right end of the outer surface of the gas collecting pipe is fixedly connected with a curved gas delivery pipe, and the left end of the outer surface of the gas collecting pipe is fixedly connected with the right ends of the outer surfaces of a plurality of diversion pipes in a one-to-one correspondence.

[0011] Preferably, the heating mechanism comprises two support plates, the upper parts of the outer surfaces of the two support plates are commonly fixedly connected with a heating furnace, and the inner surface of the heating furnace is fixedly connected with a preheating tube.

[0012] Preferably, the exhaust mechanism comprises an exhaust pipe, a solenoid valve 1 is installed on the right part of the inner cavity of the exhaust pipe, and the left end of the outer surface of the exhaust pipe is fixedly connected to the right end of the outer surface of the VOC concentration detector 2.

[0013] Preferably, the circulation mechanism includes a return pipe, a solenoid valve 2 is installed at the left output end of the return pipe inner cavity, a micro exhaust fan is installed at the right input end of the return pipe inner cavity, the left output end of the return pipe outer surface is fixedly connected to connecting pipe 1, and the right input end of the return pipe outer surface is fixedly connected to the exhaust pipe.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model can input and initially detect VOC gas under the action of the air intake mechanism and the detection mechanism, and can fully preheat the transported VOC gas through the cooperation of the gas transmission mechanism and the heating mechanism, thereby improving the practicability of the device. At the same time, under the action of the circulation mechanism, the VOC gas that is not fully preheated can be circulated and heated again until the VOC gas reaches the specified concentration standard, and then discharged through the exhaust mechanism, thereby improving the practicability and universality of the device.

[0016] 2. The utility model gathers the VOC gas after the initial dispersion detection into one stream again through the gas collecting pipe, and then makes it enter the inner cavity of the curved gas pipe uniformly. Since the outer shape of the curved gas pipe is a reciprocating bending shape, the VOC gas can stay in the inner cavity of the heating furnace for a longer time, thereby achieving a more sufficient preheating effect, thereby improving the practicability and universality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the air intake mechanism and the detection mechanism of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the gas transmission mechanism, heating mechanism and exhaust mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the circulation mechanism structure of the utility model.

[0021] In the figure: 1. bottom plate; 2. air intake mechanism; 21. support sleeve; 22. air intake pipe; 23. flange; 3. detection mechanism; 31. VOC concentration detector 1; 32. shunt pipe; 4. connecting pipe 1; 5. gas transmission mechanism; 51. gas collecting pipe; 52. curved gas transmission pipe; 6. heating mechanism; 61. support plate; 62. heating furnace; 63. preheating pipe; 7. exhaust mechanism; 71. exhaust pipe; 72. solenoid valve 1; 8. circulation mechanism; 81. reflux pipe; 82. solenoid valve 2; 83. micro exhaust fan; 9. support frame; 10. connecting pipe 2; 11. VOC concentration detector 2. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figure 1As shown, a preheating device for VOC detection comprises a bottom plate 1, an air intake mechanism 2 is fixedly connected to the left upper end of the outer surface of the bottom plate 1, and the function of connecting with an external input device is realized; a detection mechanism 3 is fixedly connected to the right of the air intake mechanism 2, and the function of detecting the initial VOC concentration of the input gas is realized; a gas transmission mechanism 5 is fixedly connected to the right of the detection mechanism 3, and the function of transmitting the input VOC gas is realized; a connecting pipe 4 is sleeved on the outside of the gas transmission mechanism 5, and the left end of the outer surface of the connecting pipe 4 is fixedly connected to the right side of the outer surface of the detection mechanism 3; a heating mechanism 6 is fixedly connected to the right end of the outer surface of the connecting pipe 4, and the function of transmitting the VOC gas into the gas is realized. In order to perform heating, the right part of the heating mechanism 6 is fixedly connected to a connecting pipe 10, and the right end of the outer surface of the connecting pipe 10 is fixedly connected to a VOC concentration detector 11, and the right part of the VOC concentration detector 11 is fixedly connected to an exhaust mechanism 7, which can realize the discharge of the preheated VOC gas, and the connecting pipe 14 and the exhaust mechanism 7 are symmetrically fixedly connected to the external front side and the external rear side with a circulation mechanism 8, which can realize the function of returning the VOC gas that is not preheated sufficiently to the inner cavity of the heating furnace 62 for preheating again, and the two circulation mechanisms 8 are fixedly connected to a support frame 9 on the outside, and the lower end of the outer surface of the support frame 9 is fixedly connected to the middle of the upper end of the outer surface of the bottom plate 1.

[0024] In order to achieve the purpose of connecting with external input devices, refer to Figure 2 The air intake mechanism 2 includes a support sleeve 21, and an air intake pipe 22 is sleeved in the upper inner cavity of the support sleeve 21, which can support the air intake pipe 22. A flange 23 is fixedly connected to the left end of the outer surface of the air intake pipe 22, which can be installed and connected through the output end of the VOC gas equipment discharged from the outside.

[0025] In order to detect the initial VOC concentration of the input gas, refer to Figure 2 The detection mechanism 3 includes a VOC concentration detector 31. A plurality of diversion tubes 32 are fixedly connected to the middle of the inner cavity of the VOC concentration detector 31, which can divert the input VOC gas into multiple batches, so that the VOC concentration detector 31 can detect its concentration more accurately after taking the average value. The left end of the outer surface of the VOC concentration detector 31 is fixedly connected to the right end of the outer surface of the intake pipe 22.

[0026] In order to achieve the purpose of transporting the input VOC gas, refer to Figure 3 The gas delivery mechanism 5 includes a gas collecting pipe 51, and a curved gas delivery pipe 52 is fixedly connected to the right end of the outer surface of the gas collecting pipe 51, which can achieve the effect of more sufficient preheating of the VOC gas by extending the delivery time of the VOC gas in the inner cavity of the heating furnace 62. The left end of the outer surface of the gas collecting pipe 51 is fixedly connected to the right end of the outer surface of the plurality of diversion pipes 32 in a one-to-one correspondence.

[0027] The VOC gas initially detected by the VOC concentration detector 31 will be gathered into a gas again through the gas collecting pipe 51, and then transported through the curved gas pipe 52 to be preheated more evenly and fully in the inner cavity of the heating furnace 62.

[0028] In order to achieve the purpose of heating the VOC gas, refer to Figure 3 The heating mechanism 6 includes two support plates 61, and the upper parts of the outer surfaces of the two support plates 61 are fixedly connected to a heating furnace 62. The inner surface of the heating furnace 62 is fixedly connected to a preheating tube 63, which can achieve the function of heating the VOC gas flowing through the inner cavity of the heating furnace 62 by generating heat.

[0029] In order to achieve the purpose of emitting the preheated VOC gas, refer to Figure 3 The exhaust mechanism 7 includes an exhaust pipe 71, a solenoid valve 72 is installed on the right part of the inner cavity of the exhaust pipe 71, and the left end of the outer surface of the exhaust pipe 71 is fixedly connected to the right end of the outer surface of the VOC concentration detector 11.

[0030] After the concentration of the VOC gas is detected again by the VOC concentration detector 11 and reaches the specified index, the fully preheated VOC gas is discharged by controlling the solenoid valve 72.

[0031] In order to achieve the purpose of returning the insufficiently preheated VOC gas to the inner cavity of the heating furnace 62 for reheating, refer to Figure 4 The circulation mechanism 8 includes a return pipe 81, a solenoid valve 82 is installed at the left output end of the inner cavity of the return pipe 81, a micro exhaust fan 83 is installed at the right input end of the inner cavity of the return pipe 81, the left output end of the outer surface of the return pipe 81 is fixedly connected to the connecting pipe 4, and the right input end of the outer surface of the return pipe 81 is fixedly connected to the exhaust pipe 71.

[0032] When it is necessary to preheat the VOC gas that has been preheated for the first time again, the exhaust pipe 71 is stopped from discharging gas by controlling the solenoid valve 1 72, and then the two micro exhaust fans 83 and the two solenoid valves 2 82 are opened while the external equipment is stopped from inputting VOC gas. At this time, the two micro exhaust fans 83 exhaust the VOC gas discharged from the inner cavity of the heating furnace 62, so that it flows through the corresponding inner cavity of the reflux pipe 81, and finally enters the inner cavity of the heating furnace 62 again through the inner cavity of the connecting pipe 1 4 for preheating treatment, until its concentration reaches the specified index through the detection of the VOC concentration detector 11, and then it is discharged to the outside by opening the solenoid valve 1 72.

[0033] It should be noted that the specific installation methods, circuit connection methods and control methods of the connecting pipe 1 4, VOC concentration detector 2 11, solenoid valve 1 72, solenoid valve 2 82 and micro exhaust fan 83 in the utility model are all conventional designs and are not elaborated in detail in the utility model.

[0034] The working principle of the utility model is as follows: first, the device for discharging VOC gas from the outside is fixedly connected to the input end of the air inlet pipe 22 through the flange 23. At this time, the input VOC gas will be divided into multiple batches and pass through the inner cavity of the VOC concentration detector 31. Then, the concentration will be detected after taking the average value through the VOC concentration detector 31. Then, it will be gathered into a stream of gas through the gas collecting pipe 51 and transported through the curved gas pipe 52 to the inner cavity of the heating furnace 62 for preheating treatment. If the VOC concentration detector 11 detects that the specified index is reached, it can be discharged to the outside by controlling the solenoid valve 72. When it is necessary to When the VOC gas preheated for the first time is preheated again, the exhaust pipe 71 is stopped from discharging gas by controlling the solenoid valve 1 72, and then the two micro exhaust fans 83 and the two solenoid valves 2 82 are opened, and the input of VOC gas by external equipment is stopped. At this time, the two micro exhaust fans 83 draw the VOC gas discharged from the inner cavity of the heating furnace 62 to the inner cavity of the reflux pipe 81, and finally enter the inner cavity of the heating furnace 62 again through the inner cavity of the connecting pipe 1 4 for preheating treatment, until the concentration reaches the specified index through the detection of the VOC concentration detector 11, and then it can be discharged to the outside by opening the solenoid valve 1 72.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A preheating device for VOC detection, comprising a bottom plate (1), characterized in that: The upper left portion of the outer surface of the bottom plate (1) is fixedly connected to an air intake mechanism (2), the right portion of the air intake mechanism (2) is fixedly connected to a detection mechanism (3), the right portion of the detection mechanism (3) is fixedly connected to an air delivery mechanism (5), the outer portion of the air delivery mechanism (5) is sleeved with a connecting pipe (4), the left end of the outer surface of the connecting pipe (4) is fixedly connected to the outer right side of the detection mechanism (3), the right end of the outer surface of the connecting pipe (4) is fixedly connected to a heating mechanism (6), and the right portion of the heating mechanism (6) is fixedly connected to a connecting pipe (4). A second connecting pipe (10) is connected, the right end of the outer surface of the second connecting pipe (10) is fixedly connected to a second VOC concentration detector (11), the right part of the second VOC concentration detector (11) is fixedly connected to an exhaust mechanism (7), the front and rear sides of the outer sides of the first connecting pipe (4) and the exhaust mechanism (7) are symmetrically fixedly connected to a circulation mechanism (8), the two circulation mechanisms (8) are fixedly connected to a support frame (9) on the outside, and the lower end of the outer surface of the support frame (9) is fixedly connected to the middle part of the upper end of the outer surface of the bottom plate (1).

2. A preheating device for VOC detection according to claim 1, characterized in that: The air intake mechanism (2) comprises a support sleeve column (21), an air intake pipe (22) is sleeved in the upper inner cavity of the support sleeve column (21), and a flange plate (23) is fixedly connected to the left end of the outer surface of the air intake pipe (22).

3. A preheating device for VOC detection according to claim 2, characterized in that: The detection mechanism (3) comprises a VOC concentration detector (31), a plurality of shunt pipes (32) are fixedly connected to the middle of the inner cavity of the VOC concentration detector (31), and the left end of the outer surface of the VOC concentration detector (31) is fixedly connected to the right end of the outer surface of the intake pipe (22).

4. A preheating device for VOC detection according to claim 3, characterized in that: The gas delivery mechanism (5) comprises a gas collecting pipe (51), the right end of the outer surface of the gas collecting pipe (51) is fixedly connected to a curved gas delivery pipe (52), and the left end of the outer surface of the gas collecting pipe (51) is fixedly connected to the right ends of the outer surfaces of a plurality of flow distribution pipes (32) in a one-to-one correspondence.

5. A preheating device for VOC detection according to claim 1, characterized in that: The heating mechanism (6) comprises two support plates (61), the upper portions of the outer surfaces of the two support plates (61) are commonly fixedly connected to a heating furnace (62), and the inner surface of the heating furnace (62) is fixedly connected to a preheating tube (63).

6. A preheating device for VOC detection according to claim 1, characterized in that: The exhaust mechanism (7) comprises an exhaust pipe (71), a solenoid valve (72) is installed at the right part of the inner cavity of the exhaust pipe (71), and the left end of the outer surface of the exhaust pipe (71) is fixedly connected to the right end of the outer surface of the VOC concentration detector (11).

7. A preheating device for VOC detection according to claim 6, characterized in that: The circulation mechanism (8) comprises a return pipe (81), a second solenoid valve (82) is installed at the left output end of the inner cavity of the return pipe (81), a micro exhaust fan (83) is installed at the right input end of the inner cavity of the return pipe (81), the left output end of the outer surface of the return pipe (81) is fixedly connected to the first connecting pipe (4), and the right input end of the outer surface of the return pipe (81) is fixedly connected to the exhaust pipe (71).

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