A micro-pressure portable flue gas pretreatment device

Abstract

The invention discloses a micro-pressure portable flue gas pretreatment device, which relates to the technical field of flue gas pretreatment, and comprises an embedded filter and a casing. The output end of the embedded filter is fixedly sleeved with an outer frame, an air path tube is fixedly installed inside the outer frame, a heating component is fixedly installed on the outer wall of the air path tube, and a control circuit is fixedly installed inside the right side of the outer frame. The invention replaces the drying form of "water and gas" separation of the existing flue gas pretreatment device with "frost and gas" separation. When the flue gas enters a low-temperature drying chamber, the water vapor is quickly condensed into frost by the low temperature of 0 to 10°C, thereby losing its solubility and adsorption capacity for gas, thereby improving the processing capacity for high-temperature and high-humidity flue gas.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas pretreatment, and in particular to a micro-pressure portable flue gas pretreatment device. Background Art

[0002] In recent years, the requirements for environmental management have been continuously improved, and ultra-low emission standards have been promulgated and implemented one after another. Taking sulfur dioxide as an example, the minimum emission limit is 30mg / Nm3. Emission enterprises have responded to national policies and carried out ultra-low emission transformation of treatment facilities. The "wet" desulfurization and denitrification purification facilities have significant effects and are widely used, resulting in a significant increase in humidity (water vapor) in flue gas.

[0003] There are dust particles and humidity (water vapor) in the flue gas from fixed pollution sources, which have a great interference on the results of flue gas analysis. The flue gas pretreatment device is a pre-treatment equipment for removing dust particles and humidity (water vapor) in the flue gas.

[0004] At present, dust particles are removed by filtering with filter elements; there are two methods for removing humidity (water vapor): semiconductor condensation method, also known as Peltier condensation method, and permeable membrane (Nafion) drying method.

[0005] Semiconductor condensation method: Existing portable semiconductor condensation method pretreatment devices generally use two-stage refrigeration (the single-stage refrigeration limit temperature difference is about 30°C), and the refrigeration temperature difference is about 50-60°C. Considering the natural cooling of high-temperature flue gas after being drawn out of the flue, this type of pretreatment device can meet the monitoring port requirements below about 160°C, and a good heat dissipation environment is required when in use. When the ambient temperature is high (>40°C), the heat dissipation performance is significantly reduced, and the high-temperature (smoke temperature>160°C) and high-humidity (moisture content>20%) flue gas cannot be quickly cooled to below 4°C (dew point temperature), and the drying capacity is reduced, which cannot meet the requirements of the flue gas analyzer for humidity (water vapor) removal rate.

[0006] Permeable membrane drying method: Nafion is a semi-permeable membrane that is highly selective for water vapor. Hydroxyl (-OH) is the only substance that can pass through Nafion. In the process of permeating water vapor, gases that are easily soluble in water, such as ammonia and sulfur dioxide, will have a certain adsorption loss; the process of removing water vapor from Nafion will maintain a balance, that is, the greater the difference in humidity between the gas inside and outside Nafion, the better the fluidity of water vapor from high humidity to low humidity. In other words, when the humidity of the use environment is high and not much different from the humidity of the flue gas, its performance in removing humidity (water vapor) will be significantly reduced. In addition, the thermal stability of Nafion is around 160°C. Working in a high temperature or salty flue gas state for a long time will cause it to lose its drying ability.

[0007] Although the above two pretreatment devices have different principles, the drying process is realized in the form of "water and gas" separation.

[0008] In actual work, it was found that the above pretreatment devices did not have enough removal rate for humidity (water vapor) in high-temperature (smoke temperature > 160°C) and high-humidity (moisture content > 20%) flue gas, and the residual humidity (water vapor) had a significant interference with the flue gas analysis results. This research and development was carried out to improve the pretreatment capabilities.

[0009] The existing flue gas pretreatment device has technical problems:

[0010] 1. The dry dew point temperature is designed at +(2~4)℃, which is theoretically sufficient for use, but its ability to handle high-temperature and high-humidity flue gas is not sufficient.

[0011] 2. Temperature sensors are mostly installed at the heating or condensing component location, and there is a difference between the actual temperature of the flue gas to be measured and the temperature displayed by the pretreatment device.

[0012] 3. The principle of the existing pretreatment device determines that the pretreatment refrigeration capacity is small. The temperature difference between winter and summer and between the north and south regions places high demands on the use environment.

[0013] 4. There are two forms of condensate discharge during the drying process of the existing pretreatment device: active and passive. There are two types of active drainage. One is timed drainage: the operator sets the drainage time and interval time on the device. The other is peristaltic pump drainage: after the condensate is generated, it is sucked out by the negative pressure of the peristaltic pump along the guide groove. Passive drainage: the condensate flows into the condensate collector under the impetus of the test airflow, and the collector is removed and discharged after the test. The above drainage methods cannot avoid the contact between the condensate and the gas to be tested, and there is a phenomenon of adsorption of the substance to be tested in the flue gas.

[0014] 5. Dust particle filters are mostly installed at the front end, and the heating component cannot heat them. During the low-temperature and high-humidity flue gas test, a water film is easily formed on the filter surface, which adsorbs the substances to be tested in the flue gas. In severe cases, it causes air blockage and affects the air intake.

[0015] 6. The pretreatment device has a low humidity (water vapor) removal rate for the flue gas being tested, which can easily cause the test results to be interfered by humidity (water vapor) and distort the flue gas analysis data.

[0016] Sulfur dioxide, nitrogen dioxide, ammonia, hydrogen sulfide, nitric oxide, oxygen and carbon monoxide are conventional indicators for monitoring flue gas from fixed pollution sources. Under a standard atmospheric pressure, the boiling points of these gases are: -10°C, -21.2°C, -33.5°C, -60.4°C, -151°C, -183°C and -192°C respectively. If the temperature is kept above -10°C, these substances exist in gaseous form; the melting point of water is 0°C, and it can remain solid below this temperature. The present invention takes into account the physical properties of these substances and aims at the technical deficiencies of the above-mentioned existing pretreatment devices, and innovatively optimizes the drying form and structure of the pretreatment device, thereby proposing a micro-pressure portable flue gas pretreatment device. Summary of the invention

[0017] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a micro-pressure portable flue gas pretreatment device.

[0018] In order to achieve the above object, the present invention adopts the following technical solutions:

[0019] A micro-pressure portable smoke pretreatment device, comprising an embedded filter and a housing, wherein an output end of the embedded filter is fixedly sleeved with an outer frame, an air pipe is fixedly installed inside the outer frame, a heating component is fixedly installed on the outer wall of the air pipe, a control circuit is fixedly installed inside the right side of the outer frame, a tee is fixedly connected to the output end of the air pipe, a hose nut is threadedly connected to the other end of the tee, a heating hose is threadedly connected to the other end of the hose nut, a signal control is fixedly installed at the bottom end of the outer frame, and a power cord is fixedly installed on the outer wall of the outer frame;

[0020] An air inlet and an air outlet are respectively provided on both sides of the top of the casing, an air inlet pipe is fixedly connected to the output end of the air inlet, a low-temperature drying chamber is fixedly installed inside the casing, a guide baffle is fixedly installed inside the low-temperature drying chamber, a conical guide bottom is fixedly installed on the bottom of the low-temperature drying chamber, a compressor is fixedly installed inside the casing, a thermal insulation layer is fixedly installed on the inner wall of the low-temperature drying chamber, a power socket is fixedly installed on the top of the casing, a digital control display screen is fixedly installed on the top of the casing, and a power switch is fixedly installed on the outside of the casing.

[0021] Preferably, a first radiator is fixedly mounted on the outer wall of the outer frame.

[0022] Preferably, an electronic fan located on one side of the compressor is fixedly installed inside the casing, and a second radiator is fixedly installed on the outer wall of the electronic fan.

[0023] Preferably, a handle is fixedly connected to the top of the casing, and rubber feet are fixedly installed on the bottom outer wall of the casing. There are four rubber feet, which are respectively located around the bottom of the casing.

[0024] Preferably, a first temperature sensor is fixedly installed inside the gas pipe, a second temperature sensor is fixedly installed inside the heating hose, and a low-temperature sensor is fixedly installed inside the low-temperature drying chamber.

[0025] Preferably, the signal control, heating component, first temperature sensor, and second temperature sensor are all electrically connected to the control circuit, and the signal control, heating component, first temperature sensor, second temperature sensor, and control circuit are all electrically connected to the power line.

[0026] Preferably, the output end of the heating hose is connected to the input end of the air inlet, the output end of the air inlet pipe is connected to the input end of the low-temperature drying chamber, the air inlet pipe is umbrella-shaped, and the output end of the air outlet is connected to the input end of the air outlet.

[0027] Preferably, a drain pipe is fixedly connected to the bottom of the low-temperature drying chamber on one side of the conical guide bottom, and a solenoid valve is fixedly installed on the outer wall of the drain pipe.

[0028] Preferably, the power socket and the power switch are electrically connected, the control digital display screen, the compressor, the low-temperature sensor, the solenoid valve, and the electronic fan are all electrically connected to the power switch, and the compressor, the low-temperature sensor, the electronic fan, and the solenoid valve are all electrically connected to the control digital display screen.

[0029] The beneficial effects of the present invention are:

[0030] 1. In the present invention, the dew point temperature of flue gas is reduced from +(2-4)℃ to 0℃~-10℃ and can be adjusted arbitrarily, and the "frost-gas" separation replaces the "water-gas" separation of the existing flue gas pretreatment device. When the flue gas enters the low-temperature drying chamber, the water vapor is quickly condensed into frost by the low temperature of 0~-10℃, thereby losing its gas solubility and adsorption capacity, and improving the processing capacity of high-temperature and high-humidity flue gas.

[0031] 2. In the present invention, refrigeration capacity is the key to ensuring the removal rate of humidity (water vapor) in flue gas, and the key to whether the refrigeration performance can be maximized lies in whether the heat can be effectively dissipated. The present invention adds a radiator and a fan combination, which changes the state of the existing semiconductor condensing device that only has fan heat dissipation, improves the heat dissipation capacity, and improves the limitations of pretreatment use due to the temperature difference between winter and summer and between north and south regions.

[0032] 3. In the present invention, the first temperature sensor is convenient for detecting the temperature condition in the gas pipe at all times, the second temperature sensor is convenient for detecting the temperature condition in the heating hose at all times, the low-temperature sensor tests the temperature of the flue gas after drying and outputs a temperature control signal. After the temperature sensor adjusts its position, it can more truly reflect the temperature change of the measured gas and support the removal of humidity (water vapor).

[0033] 4. In the present invention, the drying is carried out in the form of "frost and gas" separation. No condensed water is discharged during the test process, thus avoiding the phenomenon of condensed water adsorption.

[0034] 5. In the present invention, the heating temperatures of the outer frame and the heating hose can be set to 120-200°C and 120-160°C respectively to ensure that the flue gas to be tested is fully gasified before entering the condensation and drying part.

[0035] 6. In the present invention, the dust particle filter is designed to be embedded and can be heated to 120-200°C together with the "exoskeleton" to keep it dry, avoid the formation of water film, and eliminate adsorption and air blocking.

[0036] 7. In the present invention, a three-way design is added to the front heating part, so that the external heating function can be used alone when sampling VOC flue gas from a fixed pollution source, and the three-way at the rear end can be used for sampling with a syringe.

[0037] In summary, in the present invention, a micro-pressure portable smoke pretreatment device maintains a relatively high humidity (water vapor) removal rate under high temperature and high humidity conditions, thereby reducing the interference of humidity (water vapor) on smoke analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the embedded filter and outer frame structure of a micro-pressure portable smoke pretreatment device of the present invention.

[0039] Figure 2 The present invention is a schematic structural diagram of a casing, a low-temperature drying chamber, and an air intake pipe of a micro-pressure portable smoke pretreatment device.

[0040] Figure 3 The present invention is a side view of a casing of a micro-pressure portable smoke pretreatment device.

[0041] Figure 4 The present invention is a top view of the casing of a micro-pressure portable smoke pretreatment device.

[0042] Figure 5 This is a line diagram of the data comparison of the three pretreatment devices: "micro-pressure, semiconductor, and osmotic membrane".

[0043] Numbers in the figure: 1. Embedded filter; 2. Exoskeleton; 3. Air pipe; 4. Heating component; 501. First temperature sensor; 502. Second temperature sensor; 6. Control circuit; 7. Signal control; 8. First radiator; 9. Tee; 10. Hose nut; 11. Heating hose; 12. Power cord; 13. Casing; 14. Air inlet; 15. Air outlet; 16. Carrying handle; 17. Power socket; 18. Control digital display screen; 19. Low-temperature drying chamber; 20. Air inlet pipe; 21. Guide baffle; 22. Conical guide bottom; 23. Compressor; 24. Insulation layer; 25. Second radiator; 26. Low-temperature sensor; 27. Solenoid valve; 28. Power switch; 29. ​​Electronic fan; 30. Rubber foot. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] Embodiment 1:

[0046] As attached Figure 1 To Attachment Figure 4 As shown:

[0047] A micro-pressure portable flue gas pretreatment device comprises an embedded filter 1 and a housing 13. The embedded filter 1 is used to remove dust particles in the test flue gas, is wrapped by a heating component 4 and heats the tested flue gas synchronously with an air pipe 3. The housing 13 is a body shell. An outer frame 2 is fixedly sleeved on the output end of the embedded filter 1. An air pipe 3 is fixedly installed inside the outer frame 2. The air pipe 3 is a flue gas passage. A heating component 4 is fixedly installed on the outer wall of the air pipe 3. The heating component 4 heats the air pipe wall to above 140° C. to ensure that water in the air path remains in a gas phase state.

[0048] A control circuit 6 is fixedly installed inside the right side of the outer skeleton 2, and a tee 9 is fixedly connected to the output end of the gas line tube 3. The tee 9 is normally closed during the flue gas analysis test, and is opened when VOC and heating are required during flue gas sampling, so as to facilitate the external flue gas sampler. The other end of the tee 9 is threadedly connected to a hose nut 10, which is used for the connection and sealing of the outer skeleton 2 and the heating hose 11. The other end of the hose nut 10 is threadedly connected to a heating hose 11, and the heating hose 11 heats the wall of the gas line tube 3 to above 140°C to ensure that the water in the gas line remains in the gas phase;

[0049] The bottom end of the outer skeleton 2 is fixedly mounted with a signal control 7, a control circuit 6 and a signal control 7, which are used to set the temperature and control the working state of the heating component 4. The outer wall of the outer skeleton 2 is fixedly mounted with a power line 12, which supplies power to the entire circuit;

[0050] An air inlet 14 and an air outlet 15 are respectively provided on both sides of the top of the housing 13. The air inlet 14 is connected to the output end of the heating hose 11, and the air outlet 15 is connected to the input end of the flue gas analyzer. The output end of the air inlet 14 is fixedly connected to the air inlet pipe 20.

[0051] A low-temperature drying chamber 19 is fixedly installed inside the casing 13. The low-temperature drying chamber 19 cools, dehydrates and dries the flue gas entering the low-temperature drying chamber 19. A guide baffle 21 is fixedly installed inside the low-temperature drying chamber 19. The guide baffle 21 allows the flue gas entering the low-temperature drying chamber 19 to reflux to ensure drying efficiency. A conical guide bottom 22 is fixedly installed at the bottom of the low-temperature drying chamber 19. The conical guide bottom 22 facilitates the frost in the low-temperature drying chamber 19 to melt and discharge without residue after shutdown. A compressor 23 is fixedly installed inside the casing 13. The compressor 23 provides refrigeration for the low-temperature drying chamber 19. At the same time, the compressor 23 adopts a fully enclosed rotary DC variable frequency micro compressor for refrigeration, and adopts HFC-14a, which replaces Freon, as a refrigerant;

[0052] An insulation layer 24 is fixedly installed on the inner wall of the low-temperature drying chamber 19, and the insulation layer 24 ensures that the temperature of the low-temperature drying chamber 19 is not affected by the ambient temperature. A power socket 17 is fixedly installed on the top of the casing 13, and the power socket 17 supplies power to the entire circuit. A control digital display screen 18 is fixedly installed on the top of the casing 13, and the control digital display screen 18 sets the temperature and displays the smoke temperature in the low-temperature drying chamber 19. A power switch 28 is fixedly installed on the outside of the casing 13, and the power switch 28 turns the machine on and off.

[0053] in:

[0054] a. A first radiator 8 is fixedly mounted on the outer wall of the outer frame 2. The first radiator 8 controls external heat dissipation to ensure the working environment of the electronic components.

[0055] b. An electronic fan 29 located on one side of the compressor 23 is fixedly installed inside the casing 13, and a second radiator 25 is fixedly installed on the outer wall of the electronic fan 29. The second radiator 25 dissipates heat for the compressor 23, and the electronic fan 29 ventilates and dissipates heat for the second radiator 25 and other components requiring heat dissipation.

[0056] c. A handle 16 is fixedly connected to the top of the housing 13 for easy transportation. Rubber feet 30 are fixedly installed on the bottom outer wall of the housing 13. There are four rubber feet 30, which are respectively located around the bottom of the housing 13. The rubber feet 30 are used to stably place the body.

[0057] d. A first temperature sensor 501 is fixedly installed inside the gas pipe 3, and the first temperature sensor 501 is convenient for detecting the temperature inside the gas pipe 3 at any time. A second temperature sensor 502 is fixedly installed inside the heating hose 11, and the second temperature sensor 502 is convenient for detecting the temperature inside the heating hose 11 at any time. A low-temperature sensor 26 is fixedly installed inside the low-temperature drying chamber 19, and the low-temperature sensor 26 tests the temperature of the flue gas after drying and outputs a temperature control signal.

[0058] in:

[0059] e. The signal control 7, the heating component 4, the first temperature sensor 501, and the second temperature sensor 502 are all electrically connected to the control circuit 6. The signal control 7, the heating component 4, the first temperature sensor 501, the second temperature sensor 502, and the control circuit 6 are all electrically connected to the power line 12.

[0060] f. The output end of the heating hose 11 is connected to the input end of the air inlet 14, and the output end of the air inlet pipe 20 is connected to the input end of the low-temperature drying chamber 19. The air inlet pipe 20 is umbrella-shaped, which can prevent high-humidity flue gas from frosting at the pipe mouth of the low-temperature drying chamber 19 and blocking the air path. The air inlet pipe 20 uses polytetrafluoroethylene as the raw material, and the output end of the air outlet 15 is connected to the input end of the air outlet 15.

[0061] g. The bottom of the low-temperature drying chamber 19 is located on one side of the conical guide bottom 22 and is fixedly connected to a drain pipe. An electromagnetic valve 27 is fixedly installed on the outer wall of the drain pipe. The electromagnetic valve 27 closes the drain channel when it is turned on and opens the drain channel when it is turned off.

[0062] h. The power socket 17 and the power switch 28 are electrically connected. The control digital display screen 18, the compressor 23, the low-temperature sensor 26, the solenoid valve 27, and the electronic fan 29 are all electrically connected to the power switch 28. The compressor 23, the low-temperature sensor 26, the electronic fan 29, and the solenoid valve 27 are all electrically connected to the control digital display screen 18.

[0063] The specific usage and function of this embodiment are as follows:

[0064] When the present invention is used, the smoke passes through the built-in filter 1 to remove dust particles, the tee 9 is closed, the power line 12 is connected, the heating temperature is set by controlling the control circuit 6, the heating component 4 is controlled to work, and the heating temperatures of the outer frame 2 and the gas line pipe 3 are set to 120-200° C. and 120-160° C. respectively to ensure that the measured smoke is fully gasified, and the gasified smoke enters the low-temperature drying chamber 19 through the heating hose 11 and the air inlet 14;

[0065] Turn on the power switch 28, the solenoid valve 27 closes the drainage channel, and the temperature is set to 0 to -10°C through the temperature control digital display screen. The compressor 23 cools the low-temperature drying chamber 19, the second radiator 25 dissipates the refrigerant in the compressor 23, and the electronic fan 29 dissipates the heat of the radiator;

[0066] The flue gas is dried and dehydrated at 0 to -10°C, and the flue gas entering the low-temperature drying chamber 19 is refluxed through the guide baffle 21 to ensure the drying efficiency. The real-time flue gas temperature is tested by the low-temperature sensor 26, and the dried flue gas is input into the flue gas analysis instrument at the rear end from the gas outlet 15;

[0067] After the test is completed, the power switch 28 is turned off, the solenoid valve 27 is opened, and the frost condensed in the low-temperature drying chamber 19 melts automatically and is fully discharged through the conical guide bottom 22;

[0068] When it is necessary to sample the flue gas, similarly, the flue gas passes through the embedded filter 1 to remove dust particles, the flue gas is fully gasified in the heated 3 and 11 in 2, the tee 9 is opened, and the VOC injector is used to sample at the tee 9.

[0069] For the above structure and process, please refer to Figure 1-4 .

[0070] Embodiment 2:

[0071] experiment

[0072] High temperature, constant temperature and humidification tests of three pretreatment devices: "micro-pressure, semiconductor and permeable membrane":

[0073] 1. Equipment and gas: one each of three pretreatment devices: micro-pressure type, semiconductor type, and permeable membrane type; portable humidity calibrator (model: PHG60H); flue gas analyzer (model Testo350); sulfur dioxide standard gas (78μmol / mol).

[0074] 2. Temperature and humidity: The whole process is kept at a constant temperature of 180°C; the moisture content increases from 0 to 30%, with an increase of 5% each time; the indoor ambient temperature is 20°C and the relative humidity is 35%.

[0075] 3. Frequency and time: Each pretreatment device is tested 3 times at each moisture content gradient, and the average value is recorded after each test lasting 3 minutes.

[0076] 4. Analysis and conclusions please refer to Figure 5 As shown: In order to reduce the error in the testing process, this test uses the same flue gas analyzer and sulfur dioxide standard gas (78μmol / mol).

[0077] When the humidity content is 0.1%, the maximum deviation of “micro-pressure” pretreatment is 2μmol / mol, and the maximum deviation of “semiconductor and permeable membrane” pretreatment is 2μmol / mol.

[0078] When the humidity content is 10.1%, the maximum deviation of the “micro-pressure” pretreatment is 2μmol / mol, and the maximum deviation of the “semiconductor and permeable membrane” pretreatment is 4μmol / mol.

[0079] When the humidity content is 14.9%, the maximum deviation of the “micro-pressure” pretreatment is 3μmol / mol, and the maximum deviation of the “semiconductor and permeable membrane” pretreatment is 16μmol / mol.

[0080] When the humidity content is 20.0%, the maximum deviation of the “micro-pressure” pretreatment is 4μmol / mol, and the maximum deviation of the “semiconductor and permeable membrane” pretreatment is 30μmol / mol.

[0081] When the humidity content is 24.5%, the maximum deviation of the "micro-pressure" pretreatment is 4μmol / mol, and the maximum deviation of the "semiconductor and permeable membrane" pretreatment is 37μmol / mol.

[0082] When the humidity content is 29.5%, the maximum deviation of the “micro-pressure” pretreatment is 4μmol / mol, and the maximum deviation of the “semiconductor and permeable membrane” pretreatment is 54μmol / mol.

[0083] Conclusion: When the temperature is 180℃ and the moisture content is below 10%, the humidity removal rates of the three pretreatments are similar. When the moisture content increases to 15%, the humidity removal rates of the two pretreatments "semiconductor and permeable membrane" decrease; when the moisture content is 20-25-30%, the humidity removal capacity of the two pretreatments "semiconductor and permeable membrane" decreases significantly in a step-by-step manner, and can no longer meet the use requirements. The "micro-pressure" pretreatment maintains a good humidity removal rate throughout the process at a high temperature of 180℃ and a moisture content of 0.1-30%.

[0084] In summary, the present invention, a micro-pressure portable smoke pretreatment device, maintains a relatively high humidity (water vapor) removal rate under high temperature and high humidity conditions, and reduces the interference of humidity (water vapor) on smoke analysis results.

[0085] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0087] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A micro-pressure portable smoke pretreatment device, comprising an embedded filter (1) and a housing (13), characterized in that: The output end of the in-line filter (1) is fixedly sleeved with an outer frame (2), an air pipe (3) is fixedly installed inside the outer frame (2), a heating component (4) is fixedly installed on the outer wall of the air pipe (3), a control circuit (6) is fixedly installed inside the right side of the outer frame (2), the output end of the air pipe (3) is fixedly connected with a tee (9), the other end of the tee (9) is threadedly connected with a hose nut (10), the other end of the hose nut (10) is threadedly connected with a heating hose (11), the bottom end of the outer frame (2) is fixedly installed with a signal control (7), and the outer wall of the outer frame (2) is fixedly installed with a power cord (12); An air inlet (14) and an air outlet (15) are respectively arranged on both sides of the top of the casing (13); an output end of the air inlet (14) is fixedly connected to an air inlet pipe (20); a low-temperature drying chamber (19) is fixedly installed inside the casing (13); a guide baffle (21) is fixedly installed inside the low-temperature drying chamber (19); a conical guide bottom (22) is fixedly installed at the bottom of the low-temperature drying chamber (19); a compressor (23) is fixedly installed inside the casing (13); a heat-insulating layer (24) is fixedly installed on the inner wall of the low-temperature drying chamber (19); a power socket (17) is fixedly installed on the top of the casing (13); a digital control display screen (18) is fixedly installed on the top of the casing (13); and a power switch (28) is fixedly installed outside the casing (13).

2. A micro-pressure portable smoke pretreatment device according to claim 1, characterized in that: A first radiator (8) is fixedly mounted on the outer wall of the outer frame (2).

3. A micro-pressure portable smoke pretreatment device according to claim 1, characterized in that: An electronic fan (29) located on one side of the compressor (23) is fixedly mounted inside the casing (13), and a second radiator (25) is fixedly mounted on the outer wall of the electronic fan (29).

4. A micro-pressure portable smoke pretreatment device according to claim 1, characterized in that: The top of the housing (13) is fixedly connected with a handle (16), and the bottom outer wall of the housing (13) is fixedly installed with rubber feet (30). There are four rubber feet (30) and they are respectively located around the bottom of the housing (13).

5. A micro-pressure portable smoke pretreatment device according to claim 1, characterized in that: A first temperature sensor (501) is fixedly installed inside the gas pipe (3), a second temperature sensor (502) is fixedly installed inside the heating hose (11), and a low-temperature sensor (26) is fixedly installed inside the low-temperature drying chamber (19).

6. A micro-pressure portable smoke pretreatment device according to claim 5, characterized in that: The signal control (7), the heating component (4), the first temperature sensor (501), and the second temperature sensor (502) are all electrically connected to the control circuit (6); and the signal control (7), the heating component (4), the first temperature sensor (501), the second temperature sensor (502), and the control circuit (6) are all electrically connected to the power line (12).

7. A micro-pressure portable smoke pretreatment device according to claim 1, characterized in that: The output end of the heating hose (11) is connected to the input end of the air inlet (14), the output end of the air inlet pipe (20) is connected to the input end of the low-temperature drying chamber (19), the air inlet pipe (20) is umbrella-shaped, and the output end of the air outlet (15) is connected to the input end of the air outlet (15).

8. A micro-pressure portable smoke pretreatment device according to claim 1, characterized in that: The bottom of the low-temperature drying chamber (19) is fixedly connected to a drainage pipe on one side of the conical flow guide bottom (22), and a solenoid valve (27) is fixedly installed on the outer wall of the drainage pipe.

9. A micro-pressure portable smoke pretreatment device according to claim 8, characterized in that: The power socket (17) and the power switch (28) are electrically connected, the control digital display screen (18), the compressor (23), the low temperature sensor (26), the solenoid valve (27), and the electronic fan (29) are all electrically connected to the power switch (28), and the compressor (23), the low temperature sensor (26), the electronic fan (29), and the solenoid valve (27) are all electrically connected to the control digital display screen (18).

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