Chlorine-containing waste gas up-to-standard emission treatment process based on microwave cracking catalysis

Abstract

The invention relates to a chlorine-containing waste gas up-to-standard emission treatment process based on microwave cracking catalysis, which is applied to the field of chlorine-containing waste gas purification, realizes that the emission concentration of chlorine-containing molecules (such as trichloroethylene) is less than 1mg / m < 3 >, and thoroughly removes the waste gas molecules through multiple effects of cracking, oxidation, decomposition, enrichment, capture and the like, so that the emission concentration of the chlorine-containing molecules is less than 1mg / m < 3 >. When a filter screen is blocked, a driving motor is started to drive a cleaning frame to turn over by 90 degrees to be attached to the surface of the filter screen, and then a knocking ball drives an elastic part to knock the surface of the filter screen by utilizing airflow driven by gas entering a pit; and the cleaned dust falls onto the bottom wall of the rectangular groove and is transferred through the dust guide pipe, and the filtered airflow entering the sunken part is transferred through the air guide sheet in the process, so that normal supply of the airflow is ensured.

Description

Technical Field

[0001] The present invention relates to a process for treating chlorine-containing waste gas, in particular to a process for achieving up-to-standard discharge of chlorine-containing waste gas based on microwave cracking catalysis applied in the field of purification of chlorine-containing waste gas. Background Art

[0002] Common treatment methods for high-concentration organic waste gas mainly include combustion methods such as RTO, RCO, TO methods, absorption methods, condensation methods, adsorption methods, etc. After the halogen-containing organic waste gas is treated by combustion, strongly corrosive halogen-containing acidic gas is generated, and the concentration is relatively high, which is highly destructive to combustion equipment. At the same time, high requirements are imposed on reaction conditions, and highly toxic dioxin secondary pollutants will be generated. And according to the emission standard, trichloroethylene needs to be less than 1 mg / m 3 .

[0003] The specification of Chinese invention patent CN114100364B discloses a collaborative treatment method for organic waste gas containing nitrogen source, sulfur source and chlorine source. The prepared blast furnace slag composite adsorbent has cheap and easily available raw materials and a simple preparation method, and can produce a synergistic addition effect when used to purify organic waste gas containing nitrogen source, sulfur source and chlorine source.

[0004] In the existing treatment of chlorine-containing waste gas, although the adsorbent is cheap, the combustion method is more suitable for organic waste gas with high calorific value. When the calorific value of the waste gas components is low, a large amount of fuel usually needs to be added for combustion during operation, which greatly increases the treatment energy consumption. Therefore, the treatment process of chlorine-containing waste gas needs to be improved accordingly; In the prior art, there is a process for treating waste gas using a microwave field, but the intake air flow of the microwave field needs to be pretreated to ensure uniform input air flow and no large particle impurities. However, in the current process, the stability and filtration effect of the intake air pipe are prone to decline during long-term use, resulting in changes in the composition of the intake air flow of the microwave field, and further affecting the waste gas treatment efficiency of the microwave field. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is how to efficiently and stably purify chlorine-containing waste gas.

[0006] To solve the above problems, the present invention provides a process for achieving up-to-standard discharge of chlorine-containing waste gas based on microwave cracking catalysis, including the following working steps: S1. Pass the chlorine-containing waste gas through the intake port in the intake air pipe, and after particle interception and filtration treatment, introduce the gas into the alkali scrubbing tower, and the intercepted particles enter the storage box; S2. The gas after alkali scrubbing treatment is subjected to secondary particle interception and filtration treatment in a new intake air pipe, and the molecular sieve installed in the new intake air pipe is used to dry the passing gas; S3. The gas after being treated in S2 enters the microwave equipment. The waste gas molecules are energized by high-energy microwaves to vibrate at high frequency, generate heat by self-collision and friction to break bonds, and cooperate with the strong photon energy emitted by the electrodeless light tube in the microwave equipment to directly act on the waste gas molecules after being energized by microwaves, tearing the chemical bonds of the waste gas molecules, and controlling the residence time based on the principle of optimal energy; S4. After the gas treated in S3 enters the scrubbing tower, it enters the nano-catalysis and enrichment material coupling reactor for enrichment and catalytic treatment; S5. After the gas treated in S4 enters the scrubbing tower for the second time, it enters the spray tower for nano-capture treatment. The nano-liquid is atomized and sprayed in the spray tower by a high-pressure pump, and the diameter of the atomized small liquid droplets is 0.1 - 10 μm; S6. Through the on-line sensor and intelligent control system, the residence time, energy supply, and nano-liquid distribution of the gas in S3, S4, and S5 are optimally allocated and regulated as a whole. The waste gas treated by nano-capture enters the exhaust stack and waits for emission; A driving motor is installed on the front outer wall of the intake pipe. A filter screen for intercepting soot particles in the gas is installed inside the intake pipe. A shaft rod with one end connected to the output end of the driving motor is installed on the inner wall of the intake pipe. A cleaning frame made of non-breathable material is installed on the surface of the shaft rod. A depression is provided on the surface of the cleaning frame facing away from the filter screen. A plurality of knocking balls are placed inside the depression. A waterproof and breathable plate is hermetically fitted at the top of the depression. A rectangular groove is provided on the surface of the cleaning frame close to the filter screen, and the cross-sections of the rectangular groove and the depression are C-shaped arranged back to back with each other. A dust guide pipe is connected through the inside of the rectangular groove. A storage box is installed at the bottom of the intake pipe, and the tail end of the dust guide pipe extends into the inside of the storage box.

[0007] In the above-mentioned treatment process of chlorine-containing waste gas based on microwave cracking and catalysis, the waste gas molecules are thoroughly removed through multiple actions such as cracking, oxidation, decomposition, enrichment, and capture, achieving the goal of environmentally friendly and efficient treatment.

[0008] As a further improvement of the present application, the air guide piece is made of elastic material, and a one-way valve is installed inside the air guide piece. After the shaft rod rotates 90 degrees, the other end of the air guide piece is still on the side of the filter screen facing away from the cleaning frame.

[0009] As a further improvement of the present application, the cross-sectional area of the depression is smaller than the cross-sectional area of the cleaning frame, and an air guide piece is installed through the inside of the shaft rod. One end of the air guide piece extends into the depression, and the other end of the air guide piece extends to the side of the filter screen facing away from the cleaning frame.

[0010] As a further improvement of the present application, when the cleaning frame is in the horizontal state, it fits against the inner top wall of the intake pipe. After the cleaning frame rotates 90 degrees around the shaft rod, it fits against the surface of the filter screen. A number of elastic members are connected to the inner wall of the rectangular groove, and each elastic member includes an elastic part installed on the inner wall of the rectangular groove. One end of the elastic part is connected to an elastic ball. After the cleaning frame rotates 90 degrees, there is a gap between the surface of the elastic ball and the surface of the filter screen.

[0011] As a further improvement of the present application, a plurality of air distribution plates are installed inside the intake pipe on the side of the filter screen away from the cleaning frame, and each air distribution plate is provided with a plurality of through holes with a diameter ranging from 1 to 3 cm. During the microwave energization operation in S2, the intensity of microwave radiation is not higher than 3 mw / cm 2 。

[0012] As a further improvement of the present application, pressure sensors signal-connected to the drive motor are respectively installed on both side surfaces of the filter screen to detect the pressure difference between both side surfaces of the filter screen. The dust guide pipe is made of an elastic material, and a solenoid valve signal-connected to the drive motor is installed on the surface of the dust guide pipe.

[0013] As another improvement of the present application, a lead screw is installed inside the rectangular groove. A moving ring is threadedly sleeved on the surface of the lead screw. A scraper with the same cross-sectional width value as the cross-sectional width value of the filter screen is installed on the surface of the moving ring. A second bevel gear is sleeved on the top end of the lead screw, and a first bevel gear is meshed and connected above the second bevel gear. A one-way rotating shaft penetrates through the first bevel gear, and one end of the one-way rotating shaft extends into the recess. An impeller group is sleeved on the surface of the part of the one-way rotating shaft located in the recess.

[0014] As a supplement to another improvement of the present application, an elastic gasket is connected to the bottom of the rectangular groove. The position where the elastic gasket contacts the dust guide pipe is fixedly connected. The elastic gasket is connected to the inlet ends of other dust guide pipes through hoses. The four corners of the top of the elastic gasket are connected to the bottom of the scraper through connecting cables.

[0015] As a supplement to another improvement of the present application, the connecting cable is made of a non-elastic material, and the length of the connecting cable is less than the length value of the lead screw. An arc-shaped notch is provided on one side of the elastic gasket close to the lead screw, and the diameter of the arc-shaped notch is not less than the diameter of the lead screw.

[0016] In summary, through multiple actions such as cracking, oxidation, decomposition, enrichment, and capture, the waste gas molecules are completely removed. In the intake pipe, the waste gas is intercepted and filtered for dust. When the filter screen is blocked, the drive motor is started to drive the cleaning frame to turn 90 degrees and fit onto the surface of the filter screen. Then, using the airflow driven by the gas entering the depression, the knocking ball drives the elastic member to knock on the surface of the filter screen. The cleaned dust falls onto the bottom wall of the rectangular groove and is transferred through the dust guide pipe. During this process, the deflector is used to transfer the filtered airflow entering the depression, ensuring the normal supply of the airflow. The cooperation of the scraper and the elastic gasket is used to comprehensively clean the surface of the filter screen and efficiently transfer the cleaned dust, which is conducive to the regular automatic cleaning of the filter screen in the intake pipe, making it easy to meet the intake requirements of each device in the process, ensuring that each device in the process is not easily affected by the intake change and affecting the working efficiency, and is conducive to ensuring the long-term stable operation of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the process flow chart of the present application; Figure 2 is the schematic diagram of the flow path during the waste gas treatment of the present application; Figure 3 is the overall structure diagram of the first embodiment of the present application; Figure 4 is the schematic diagram of the internal structure of the intake pipe of the first embodiment of the present application; Figure 5 is the schematic diagram of the installation of the deflector of the first embodiment of the present application; Figure 6 is the schematic diagram of the internal structure of the depression in the cleaning frame of the first embodiment of the present application; Figure 7 is the schematic diagram of the internal structure of the rectangular groove in the cleaning frame of the first embodiment of the present application; Figure 8 is the schematic diagram of the state of the cleaning frame after turning 90 degrees in the first embodiment of the present application; Figure 9 is the state diagram of the airflow passing through the deflector after the cleaning frame turns 90 degrees in the first embodiment of the present application; Figure 10 of the present application Figure 8 is the schematic diagram at location A; Figure 11 is the installation diagram of the lead screw, scraper, and one-way rotating shaft of the second embodiment of the present application; Figure 12 is the installation diagram of the one-way rotating shaft, first bevel gear, second bevel gear, and lead screw of the second embodiment of the present application; Figure 13Installation diagram of the elastic gasket and connecting cable for the second embodiment of this application; Figure 14 State diagram of the connecting cable when the scraper moves down for the second embodiment of this application; Figure 15 Top view of the elastic gasket for the second embodiment of this application; Figure 16 State diagram when the side of the elastic gasket for the second embodiment of this application is raised to form a U shape.

[0018] Explanation of the reference numerals in the figure: 1. Intake pipeline; 2. Driving motor; 3. Storage box; 4. Filter screen; 5. Cleaning frame; 51. Waterproof and breathable plate; 52. Knocking ball; 53. Elastic member; 54. Lead screw; 55. Scraper; 6. Dust guide pipe; 7. Air guide vane; 8. One-way rotating shaft; 9. First bevel gear; 10. Second bevel gear; 11. Elastic gasket. Specific embodiments

[0019] The following will make a detailed description of the two embodiments of this application with reference to the accompanying drawings.

[0020] The first embodiment: Figure 1-2 Disclosed is a process for the up-to-standard discharge treatment of chlorine-containing waste gas based on microwave cracking catalysis, including the following working steps: S1. Pass the chlorine-containing waste gas into the intake port in the intake pipeline 1, and after particulate interception and filtration treatment, the gas is introduced into the caustic scrubbing tower, and the intercepted particles enter the storage box 3; S2. The gas after caustic scrubbing treatment undergoes secondary particulate interception and filtration treatment in the new intake pipeline 1, and the molecular sieve installed in the new intake pipeline 1 is used to dry the passing gas; S3. The gas after being treated in S2 enters the microwave equipment, and the waste gas molecules are energized by high-energy microwaves to vibrate at high frequency, generate heat by self-collision and friction to break bonds, and cooperate with the strong photon energy emitted by the electrodeless light tube in the microwave equipment to directly act on the waste gas molecules after being microwave-energized, tear the chemical bonds of the waste gas molecules, and control the residence time based on the principle of optimal energy; S4. The gas after being treated in S3 enters the scrubbing tower and then enters the nano-catalysis and enrichment material coupling reactor for enrichment and catalysis treatment; S5. The gas after being treated in S4 enters the scrubbing tower again and then enters the spray tower for nano-capture treatment. The nano-liquid is atomized and sprayed in the spray tower by a high-pressure pump, and the diameter of the atomized small liquid droplets is 0.1 - 10 μm; S6. Through the online sensors and intelligent control system, the residence time, energy supply, and nano-liquid of the gas in S3, S4, and S5 are regulated for overall optimal distribution. The exhaust gas treated by nano-capture enters the exhaust stack and waits for emission; Specifically, based on the coupling principle of molecular reaction engineering and green chemistry, first, using the mechanism of molecular reaction engineering, under the coupling of the energy field and matter, more than 90% is removed by microwave pyrolysis, oxidation, and decomposition. Then, based on the principle of using low organic absorbents in green chemistry, the remaining low-concentration molecules are enriched and captured to remove 10%, achieving less than 1 mg / m 3 , with low process energy consumption and in line with the principles of green chemistry.

[0021] In S3, in this process for treating chlorine-containing exhaust gas, after the exhaust gas enters the high-frequency microwave cavity field in the microwave equipment, the microwave energy is converted into the internal energy of the exhaust gas molecules, causing them to excite energy level transitions. Through high-energy microwaves, the exhaust gas molecules vibrate, rub, and collide at high frequencies, causing their bonds to break and rupture. At the same time, the high-frequency microwaves excite the non-polar light tube to emit high-energy photons, and the photons directly bombard the electrons to break the chemical bonds of the exhaust gas molecules. Moreover, while directly cracking the pollutant components, it also excites the air to generate active groups such as oxygen free radicals and hydroxyl groups, accompanied by primary chemical reactions to oxidize the residual organic exhaust gas; In S4, the exhaust gas flows through the surface of the nano-catalysis and enrichment material coupling reactor, capturing and absorbing the low-concentration molecules that are difficult to decompose. Using the entropy-controlled nano-catalyst (which can be selected from manganese polyoxide or other materials), O free radicals are catalytically generated. It has transient strong oxidizing properties. Therefore, adsorbing and anchoring it to the surface of the enrichment material will greatly increase the lifetime of the free radicals and thus improve the oxidation efficiency. Through the multi-stage series connection of nano-catalysis and enrichment materials, the rapid stepwise decrease of organic matter can be achieved. The deep VOCs elimination technology with the stepwise decrease - series enrichment and regeneration nano-catalysis coupling effect synergizes the nano-catalysis and deep enrichment processes, and can achieve the deep removal of VOCs and characteristic pollutants; In S5, the diameter of the atomized micro-nano droplets can reach 0.1 - 10 μm, significantly increasing the specific surface area of the droplets and enhancing their ability to adsorb and absorb VOCs and odor molecules. Most of the core components of the nano-liquid contain multiple conjugated double bond systems. The atomized nano-liquid droplets have a huge surface energy and a strong ability to provide electron pairs, further enhancing the reaction activity of absorbing VOCs and odor molecules, making it easy to undergo chemical reactions at room temperature to form non-toxic and harmless stable compounds, achieving the purpose of completely removing exhaust gas molecules.

[0022] This process has comprehensive advantages such as high safety, environmental friendliness, high treatment efficiency, and low cost. It is an excellent alternative to the combustion method and adsorption method in traditional VOCs treatment technologies. Moreover, both the gas flow pipeline and the intake pipeline 1 in this application are anti-corrosion pipelines coated with polytetrafluoroethylene coatings, ensuring that the pipeline can work stably for a long time under corrosive conditions.

[0023] Figure 3-7 As shown, a driving motor 2 is installed on the front outer wall of the intake pipeline 1. A filter screen 4 for intercepting soot particles in the gas is installed inside the intake pipeline 1. A shaft rod whose one end is connected to the output end of the driving motor 2 is installed on the inner wall of the intake pipeline 1. And a cleaning frame 5 made of non-breathable material is installed on the surface of the shaft rod. A recess is provided on the surface of the cleaning frame 5 facing away from the filter screen 4. A plurality of knocking balls 52 are placed inside the recess. A waterproof breathable plate 51 is hermetically fitted at the top of the recess. A rectangular groove is provided on the surface of the cleaning frame 5 close to the filter screen 4. And the cross-sections of the rectangular groove and the recess are C-shaped arranged back to back with each other. A dust guide pipe 6 is connected through the inside of the rectangular groove. A storage box 3 is installed at the bottom of the intake pipeline 1. And the tail end of the dust guide pipe 6 extends into the inside of the storage box 3.

[0024] Specifically, in the initial state, the cleaning frame 5 is in a horizontally placed state. At this time, the solenoid valve on the surface of the dust guide pipe 6 is in a closed state, which can prevent the passing chlorine-containing waste gas from being transferred to the storage box 3 through the dust guide pipe 6. And at this time, the recess at the top of the cleaning frame 5 is surrounded by the inner top wall of the intake pipeline 1 and the side wall of the cleaning frame 5, being in a non-ventilated state. Therefore, the gas in the intake pipeline 1 cannot enter the recess through the waterproof breathable plate 51, and only the particle filtration and interception operation can be carried out through the filter screen 4. Figure 8-10 As shown, when the cleaning frame 5 is switched from the horizontal state to the vertical state, the rectangular groove in the cleaning frame 5 is buckled on the surface of the filter screen 4. At this time, the recess faces the windward side inside the intake pipeline 1 and the solenoid valve is opened. The dust guide pipe 6 is in a smooth state. The waterproof breathable plate 51 can intercept dust and enable the filtered gas to enter the recess and then be transferred to the side of the filter screen 4 away from the cleaning frame 5 through the air guide piece 7, realizing the continuous supply of air flow. When cleaning the filter screen 4, the gas enters the recess, which will drive the internal knocking balls 52 to move irregularly and hit the inner wall of the rectangular groove, indirectly driving the elastic member 53 to vibrate, thereby achieving the effect of knocking and removing dust on the surface of the filter screen 4. The dust falling off due to vibration drops to the bottom wall of the rectangular groove and is transferred to the storage box 3 through the dust guide pipe 6.

[0025] In this way, compared with the traditional filter structure where the dust still remains in the filter after surface cleaning, in this application, when cleaning the filter screen 4, it can effectively transfer the cleaned dust outside the intake pipeline 1 without interrupting the gas flow and without damaging the overall airtightness of the intake pipeline 1.

[0026] The cross-sectional area of the recess is smaller than that of the cleaning frame 5, and a gas guide vane 7 is installed through the inside of the shaft rod. One end of the gas guide vane 7 extends into the recess, and the other end of the gas guide vane 7 extends to the side of the filter screen 4 away from the cleaning frame 5.

[0027] Specifically, the cross-sectional area difference between the recess and the cleaning frame 5 enables the border of the cleaning frame 5 to cooperate with the inner top wall of the intake pipe 1 when the cleaning frame 5 is placed horizontally, blocking the recess to prevent the passing waste gas from entering the recess and causing unnecessary knocking behavior.

[0028] The gas guide vane 7 is made of elastic material, and a one-way valve is installed inside the gas guide vane 7. After the shaft rod rotates 90 degrees, the other end of the gas guide vane 7 is still on the side of the filter screen 4 away from the cleaning frame 5.

[0029] Specifically, after the cleaning frame 5 rotates 90 degrees, the gas guide vane 7 undergoes partial displacement and still keeps its tail end on the side of the filter screen 4 away from the cleaning frame 5, so as to ensure that the gas can flow smoothly through the gas guide vane 7 when cleaning the filter screen 4.

[0030] When the cleaning frame 5 is in the horizontal state, it fits with the inner top wall of the intake pipe 1. After the shaft rod rotates 90 degrees, the cleaning frame 5 fits with the surface of the filter screen 4. A number of elastic members 53 are connected to the inner wall of the rectangular groove, and the elastic member 53 includes an elastic part installed on the inner wall of the rectangular groove. One end of the elastic part is connected with an elastic ball, and there is a gap between the surface of the elastic ball and the surface of the filter screen 4 after the cleaning frame 5 rotates 90 degrees.

[0031] Specifically, when the knocking ball 52 hits and drives the elastic member 53 to vibrate, the elastic ball will knock on the surface of the filter screen 4 under the action of the elastic part, so as to better clean the dust on the surface of the filter screen 4.

[0032] A plurality of air distribution plates are installed inside the intake pipe 1 on the side of the filter screen 4 away from the cleaning frame 5, and each air distribution plate is provided with a plurality of through holes with a diameter of 1 - 3 cm. The intensity of microwave radiation during the microwave energizing operation in S2 is not higher than 3 mw / cm 2 。

[0033] Specifically, to prevent the local gas mass concentration from being too high during the transportation of chlorine-containing waste gas, before entering the microwave equipment, the gas mass is dispersed by a plurality of air distribution plates arranged in the intake pipe 1 to achieve the effect of air distribution and mixing, ensuring that the gas concentration distribution entering the processing equipment is uniform. In addition, the through holes of the air distribution plates are adjusted to 1 - 3 cm to prevent blockage of the through holes caused by self-aggregation and gas path blockage. In addition, the microwave radiation is controlled within the safe radiation range to ensure operation safety.

[0034] Pressure sensors signal - connected to the drive motor 2 are respectively installed on both side surfaces of the filter screen 4 for detecting the pressure difference between both side surfaces of the filter screen 4. The dust - guiding pipe 6 is made of an elastic material, and a solenoid valve signal - connected to the drive motor 2 is installed on the surface of the dust - guiding pipe 6.

[0035] Specifically, when the filter screen 4 is blocked on the windward side, the pressure sensors on both sides detect that the pressure difference exceeds a preset value (the preset value is not fixed and can be adjusted according to the actual situation), indicating that the surface of the filter screen 4 needs to be cleaned. At this time, the drive motor 2 starts to drive the cleaning frame 5 to rotate 90 degrees, switching from the original horizontal state to a vertical state where it fits closely on the surface of the filter screen 4. After the cleaning frame 5 is switched to the vertical placement state, the solenoid valve is opened to facilitate the subsequent import and discharge of dust.

[0036] The second implementation method: Figure 11-12 It is shown that a lead screw 54 is installed inside the rectangular groove. A moving ring is thread - sleeved on the surface of the lead screw 54. A scraper 55 with the same cross - section width value as the cross - section width value of the filter screen 4 is installed on the surface of the moving ring. And a second bevel gear 10 is sleeved on the top end of the lead screw 54. A first bevel gear 9 is meshed and connected above the second bevel gear 10. A one - way rotating shaft 8 is installed through the inside of the first bevel gear 9, and one end of the one - way rotating shaft 8 extends into the depression. An impeller group is sleeved on the surface of the part of the one - way rotating shaft 8 located in the depression.

[0037] Figure 13 It is shown that an elastic gasket 11 is connected to the bottom of the rectangular groove. The position where the elastic gasket 11 contacts the centrally - arranged dust - guiding pipe 6 is fixedly connected. The inlet ends of the elastic gasket 11 and the other dust - guiding pipes 6 are connected by hoses. The four corners at the top of the elastic gasket 11 and the bottom of the scraper 55 are connected by connecting cables.

[0038] Figure 15 It is shown that the connecting cables are made of non - elastic materials, and the length of the connecting cables is less than the length value of the lead screw 54. An arc - shaped notch is provided on one side of the elastic gasket 11 close to the lead screw 54, and the diameter of the arc - shaped notch is not less than the diameter of the lead screw 54.

[0039] Different from the first implementation method, in this implementation method, aiming at the phenomenon that the cleaning area of the elastic member 53 in the first implementation method is limited, resulting in incomplete cleaning of the surface of the filter screen 4, in this implementation method, the elastic member 53 is cancelled. The width of the elastic gasket 11 is slightly less than the width of the rectangular groove. The lead screw 54 is located close to the inner wall of the rectangular groove, and both the dust - guiding pipe 6 and the hose penetrate to the top end of the elastic gasket 11.

[0040] Specifically, the one-way rotating shaft 8 only supports rotation in a single direction. Therefore, under the impact of the airflow in the recess and the cooperation of the impeller group, the one-way rotating shaft 8 rotates in a single direction and drives the first bevel gear 9 to rotate. Under the meshing action, the second bevel gear 10 rotates and drives the lead screw 54 to rotate, thereby driving the scraper 55 to move downward from top to bottom (when the cleaning frame 5 separates from the inner top wall of the intake pipe 1, the lead screw 54 starts to rotate. During the period until the cleaning frame 5 fits the surface of the filter screen 4, the scraper 55 can be moved to a position flush with the top of the filtering area of the filter screen 4. At this time, the elastic gasket 11 is in a flat state). The downward movement of the scraper 55 can be used to scrape and remove the blocked dust on the surface of the filter screen 4 (initially, the scraper 55 is located above the filtering area of the filter screen 4, and at this time, the elastic gasket 11 is in a U-shaped). The scraped dust falls onto the top surface of the elastic gasket 11; As the scraper 55 descends, the connecting cable gradually changes from the original taut state to the subsequent slack state (as Figure 14 shown), until the scraper 55 drops to the lowest point and then moves upward. As the scraper 55 moves upward, the connecting cable gradually becomes taut. After the connecting cable becomes taut, the scraper 55 still has not reached the top of the lead screw 54. At this time, the scraper 55 still moves upward. At this time, the connecting cable will pull the unfixed area of the elastic gasket 11 upward. Since the part of the elastic gasket 11 in contact with the dust guide pipe 6 at the center position is fixedly connected, during the stretching process, the cross-section of the elastic gasket 11 will form a U-shaped (as Figure 16 shown). The dust guide pipe 6 at the center position is the bottom valley position. At this time, the dust accumulated on the surface of the elastic gasket 11 will automatically roll into the dust guide pipe 6 at the center position and then be transferred to the storage box 3, realizing the automatic transfer of the dust outside the area of the dust guide pipe 6 on the surface of the elastic gasket 11.

[0041] In summary, in this application, the exhaust gas molecules are thoroughly removed through multiple actions such as cracking, oxidation, decomposition, enrichment, and capture. In the intake pipe 1, the exhaust gas is intercepted and filtered for dust. When the filter screen 4 is blocked, the drive motor 2 is started to drive the cleaning frame 5 to flip 90 degrees and fit to the surface of the filter screen 4. Then, using the airflow driven by the gas entering the recess, the knocking ball 52 drives the elastic member 53 to knock the surface of the filter screen 4. The cleaned dust falls onto the bottom wall of the rectangular groove and is transferred through the dust guide pipe 6. During this process, the air guide piece 7 is used to transfer the filtered airflow entering the recess to ensure the normal supply of the airflow. The cooperation of the scraper 55 and the elastic gasket 11 is used to comprehensively clean the surface of the filter screen 4 and efficiently transfer the cleaned dust, which is easy for the filter screen 4 in the intake pipe 1 to be automatically cleaned regularly, easy to make the intake requirements of each device in the process qualified, ensure that each device in the process is not easily affected by the intake change and the working efficiency, and is easy to ensure the long-term stable operation of the process.

[0042] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the scope of protection is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A process for treating chlorine-containing waste gas to meet emission standards based on microwave cracking catalysis, characterized in that: The following steps are included: S1, passing the chlorine-containing waste gas through the air inlet in the air inlet pipe (1), and after being treated by particle interception and filtration, the gas is introduced into the alkaline washing tower, and the intercepted particles enter the storage box (3); S2, the gas after the alkali washing is passed through the new air intake pipe (1) for secondary particle interception and filtration, and then the molecular sieve installed in the new air intake pipe (1) is used to dry the gas; S3. The gas treated by S2 enters the microwave equipment, and the high-energy microwaves energize the waste gas molecules to make them vibrate at high frequency, self-heat, collide, rub and break bonds. The strong photon energy emitted by the electrodeless light tube in the microwave equipment directly acts on the waste gas molecules after microwave energization, tearing the chemical bonds of the waste gas molecules, and controlling the residence time based on the energy optimization principle; After the gas treated by S4 and S3 enters the scrubber, it enters the nano-catalytic and enrichment material coupling reactor for enrichment catalytic treatment; After the gas treated by S5 and S4 enters the scrubber for the second time, it enters the spray tower for nano-capture treatment. The nano-liquid is atomized and sprayed in the spray tower by a high-pressure pump. The diameter of the atomized droplets is 0.1-10μm. S6, through online sensors and intelligent control systems, the residence time, energy supply, and nano-liquid distribution of the gas in S3, S4, and S5 are regulated as a whole, and the waste gas treated by nano-capture enters the exhaust pipe and waits for discharge; A drive motor (2) is mounted on the front outer wall of the air intake duct (1), a filter screen (4) for intercepting smoke particles in the gas is mounted in the air intake duct (1), a shaft having one end connected to the output end of the drive motor (2) is mounted on the inner wall of the air intake duct (1), and a cleaning frame (5) made of a non-air-permeable material is mounted on the surface of the shaft, a depression is arranged on the surface of the cleaning frame (5) on the side facing away from the filter screen (4), a plurality of knocking balls (52) are placed inside the depression, a waterproof and breathable plate (51) is sealed and engaged with the top of the depression, a rectangular groove is arranged on the surface of the cleaning frame (5) on the side close to the filter screen (4), and the cross-sections of the rectangular groove and the depression are C-shaped and arranged back to back, a dust guide pipe (6) is connected to the inside of the rectangular groove, a storage box (3) is mounted on the bottom of the air intake duct (1), and the tail end of the dust guide pipe (6) extends to the inside of the storage box (3).

2. According to claim 1, a microwave cracking catalysis-based chlorine-containing waste gas emission control process is characterized by: The cross-sectional area of ​​the recess is smaller than the cross-sectional area of ​​the cleaning frame (5), and an air guide sheet (7) is installed through the interior of the shaft, one end of the air guide sheet (7) extends into the recess, and the other end of the air guide sheet (7) extends to a side of the filter screen (4) away from the cleaning frame (5).

3. A microwave cracking catalytic method for treating chlorine-containing waste gas to meet emission standards according to claim 2, characterized in that: The air guide plate (7) is made of elastic material, and a one-way valve is installed inside the air guide plate (7). After the shaft rod rotates 90 degrees, the other end of the air guide plate (7) is still on the side of the filter screen (4) away from the cleaning frame (5).

4. The microwave pyrolysis catalysis-based chlorine-containing waste gas emission control process according to claim 2 is characterized in that: The cleaning frame (5) fits with the inner top wall of the air intake duct (1) when in a horizontal state. The cleaning frame (5) fits with the surface of the filter screen (4) after the shaft is rotated 90 degrees. The inner wall of the rectangular groove is connected to a plurality of elastic members (53). The elastic member (53) comprises an elastic member installed on the inner wall of the rectangular groove. One end of the elastic member is connected to an elastic ball. After the cleaning frame (5) is rotated 90 degrees, there is a gap between the surface of the elastic ball and the surface of the filter screen (4).

5. The process for treating chlorine-containing waste gas by microwave cracking catalysis according to claim 1 is characterized in that: The air intake duct (1) is internally provided with a plurality of air distribution plates located on the side of the filter (4) away from the cleaning frame (5), and each air distribution plate is internally provided with a plurality of through holes with a diameter of 1-3 cm. The intensity of microwave radiation during the microwave energization operation in S2 is not higher than 3 mw / cm2.

6. The microwave cracking catalytic method for treating chlorine-containing waste gas to meet emission standards according to claim 1, characterized in that: Pressure sensors connected to the signal of the drive motor (2) are respectively mounted on the two side surfaces of the filter (4) for detecting the pressure difference between the two side surfaces of the filter (4); the dust guide tube (6) is made of elastic material, and a solenoid valve connected to the signal of the drive motor (2) is mounted on the surface of the dust guide tube (6).

7. The microwave cracking catalytic method for treating chlorine-containing waste gas according to claim 1 is characterized in that: A lead screw (54) is installed inside the rectangular groove, a moving ring is threadedly sleeved on the surface of the lead screw (54), a scraper (55) having a cross-sectional width value equal to the cross-sectional width value of the filter screen (4) is installed on the surface of the moving ring, and a second bevel gear (10) is sleeved on the top end of the lead screw (54), a first bevel gear (9) is meshingly connected to the top of the second bevel gear (10), a one-way rotating shaft (8) is installed inside the first bevel gear (9), and one end of the one-way rotating shaft (8) extends into the recess, and an impeller assembly is sleeved on the surface of the one-way rotating shaft (8) located in the recess.

8. The microwave cracking catalytic method for treating chlorine-containing waste gas to meet emission standards according to claim 7, characterized in that: An elastic gasket (11) is connected to the bottom of the rectangular groove, the elastic gasket (11) is connected to the inlet end of the other dust guide pipe (6) via a hose, and the position where the elastic gasket (11) contacts the dust guide pipe (6) is fixedly connected, and the top four corners of the elastic gasket (11) are connected to the bottom of the scraper (55) via a connecting rope.

9. The microwave cracking catalytic method for treating chlorine-containing waste gas to meet emission standards according to claim 8, characterized in that: The connecting rope is made of a non-elastic material, and the length of the connecting rope is less than the length of the lead screw (54); the elastic gasket (11) is provided with an arc-shaped notch on a side close to the lead screw (54), and the diameter of the arc-shaped notch is not less than the diameter of the lead screw (54).

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