Chlorine-containing waste gas treatment device

Abstract

The utility model relates to the field of waste gas treatment and discloses a chlorine-containing waste gas treatment device which comprises a reactor and an absorption tower. Wherein the reactor comprises a gas mixing chamber and a reaction chamber which are communicated with each other, the gas mixing chamber is provided with a hot gas inlet and a waste gas inlet, the gas mixing chamber is arranged to be used for mixing hot air entering through the hot gas inlet and the waste gas inlet with waste gas to be treated, the reaction chamber is used for oxidizing mixed gas from the gas mixing chamber, and the reaction chamber is provided with a gas outlet; the absorption tower is provided with a gas inlet, the gas inlet is communicated with the gas outlet, and the absorption tower is used for absorbing chlorine-containing pollutants in the gas from the reaction chamber. According to the chlorine-containing waste gas treatment device provided by the utility model, the corrosion degree of the chlorine-containing waste gas to the waste gas treatment device and the pipeline is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and specifically to a chlorine-containing waste gas treatment device. Background Technology

[0002] Volatile organic compounds (VOCs) refer to easily volatile organic compounds with boiling points between 50-260℃ and saturated vapor pressures exceeding 70 Pa at room temperature. Chlorinated volatile organic compounds (CVOCs) are among the most emitted and harmful VOCs. The vast majority of chlorinated waste gases are highly volatile, chemically and thermally stable, and not easily decomposed. They can remain in the air for extended periods, causing persistent environmental pollution and posing a serious threat to human and biological health.

[0003] Currently, the main methods for treating chlorine-containing waste gas include recovery and disposal technologies. Recovery technologies include adsorption, absorption, condensation, and membrane separation, while disposal technologies mainly include biodegradation, photocatalysis, plasma treatment, direct combustion, and catalytic combustion. Considering both cost and technology, catalytic combustion has significant advantages. It utilizes a catalyst to oxidize and decompose CVOCs into CO2, H2O, and HCl at relatively low temperatures and with the participation of active oxygen, thereby achieving the degradation of the waste gas.

[0004] For chlorine-containing waste gas, hydrogen chloride gas is generated not only during catalytic combustion but also during preheating. Hydrogen chloride gas poses a corrosive risk to the equipment. Furthermore, chlorine-containing waste gas often contains water vapor. When the gas temperature is below the water dew point, hydrogen chloride gas dissolves in water to form highly corrosive hydrochloric acid. This hydrochloric acid condenses on the walls and pipes, causing severe corrosion and affecting the long-term operation of the equipment, thus increasing the cost of chlorine-containing waste gas treatment. Utility Model Content

[0005] The purpose of this invention is to overcome the problem that hydrogen chloride generated from the decomposition of chlorine-containing waste gas in existing waste gas treatment devices easily corrodes the devices and pipelines, and to provide a chlorine-containing waste gas treatment device that effectively reduces the degree of corrosion of the waste gas treatment device and pipelines by chlorine-containing waste gas.

[0006] To achieve the above objectives, this utility model provides a chlorine-containing waste gas treatment device, the chlorine-containing waste gas treatment device comprising:

[0007] A reactor comprising a mixing chamber and a reaction chamber connected to each other, the mixing chamber having a hot gas inlet and an exhaust gas inlet, the mixing chamber being configured to mix hot air entering through the hot gas inlet and the exhaust gas inlet with exhaust gas to be treated, the reaction chamber being used to oxidize the mixed gas from the mixing chamber, and the reaction chamber having a gas outlet; and

[0008] An absorption tower having a gas inlet connected to a gas outlet, the absorption tower being used to absorb chlorine-containing pollutants from the gas from the reaction chamber.

[0009] The chlorine-containing waste gas treatment device provided by this utility model includes a reactor and an absorption tower. The reactor is used to oxidize the waste gas to be treated, realizing the primary treatment of the waste gas. The absorption tower is used to absorb chlorine-containing pollutants in the oxidized waste gas, realizing the secondary treatment of the waste gas to be treated. The reactor includes a mixing chamber and a reaction chamber that are interconnected. The mixing chamber mixes the waste gas to be treated with air, and the reaction chamber oxidizes the waste gas to be treated. The mixing chamber has a hot air inlet and a waste gas inlet. When the chlorine-containing waste gas treatment device provided by this utility model is used to treat chlorine-containing waste gas, the waste gas to be treated enters the mixing chamber through the waste gas inlet and mixes with the hot air entering the mixing chamber through the hot air inlet, thereby being heated by the hot air to improve the oxidation efficiency of the waste gas to be treated. This avoids the problems in related technologies where the waste gas to be treated is first mixed with air and then the mixed gas is passed into a preheating device for heating, which generates hydrogen chloride and water vapor that corrodes the preheating device and pipelines during the heating process. The reaction chamber has a gas outlet, and the absorption tower has a gas inlet. The gas inlet and the gas outlet together connect the reaction chamber and the absorption tower, thereby enabling the waste gas oxidized in the reaction chamber to be passed into the absorption tower for secondary treatment to degrade the chlorine-containing pollutants in the waste gas.

[0010] Preferably, the chlorine-containing waste gas treatment device further includes:

[0011] A preheater, located upstream of the reactor, is used to heat air to form hot air, and the preheater has a hot air outlet connected to the hot air inlet.

[0012] The chlorine-containing waste gas treatment device provided by this utility model has a preheater that heats the air, and the hot air outlet is connected to the hot air inlet to provide hot air to the reactor. This further avoids the problem in related technologies where the waste gas to be treated is first mixed with air and then the mixed gas is passed into the preheating device for heating, which generates hydrogen chloride and water vapor that corrodes the preheating device and pipelines during the heating process.

[0013] Preferably, the reactor further includes a partition that separates the mixing chamber from the reaction chamber, and the partition has vent holes that connect the mixing chamber and the reaction chamber.

[0014] Preferably, the mixing chamber is provided with a mixing element, which is used to mix the hot air entering through the hot air inlet and the exhaust gas inlet with the exhaust gas to be treated.

[0015] The chlorine-containing waste gas treatment device provided in this embodiment of the invention includes a reactor further comprising a partition; the partition separates the mixing chamber and the reaction chamber. The partition has vent holes, which connect the mixing chamber and the reaction chamber. A mixing element is provided within the mixing chamber to ensure more uniform mixing of the waste gas to be treated and the hot air.

[0016] Preferably, the partition has a plurality of vent holes, which are evenly distributed on the partition.

[0017] The chlorine-containing waste gas treatment device provided in this embodiment of the utility model has a plurality of ventilation holes evenly distributed on the partition plate, so that the gas introduced into the reaction chamber is evenly distributed in the reaction chamber.

[0018] Preferably, the mixing chamber has one hot gas inlet and multiple waste gas inlets. The hot gas inlet is located in the middle of the side of the mixing chamber away from the reaction chamber, and the multiple waste gas inlets are evenly distributed around the hot gas inlet.

[0019] The chlorine-containing waste gas treatment device provided by this utility model has the waste gas inlet evenly distributed around the hot air inlet, so that the hot air and the waste gas to be treated are mixed more evenly in the mixing chamber.

[0020] Preferably, the absorption tower comprises:

[0021] The tower body, wherein the gas inlet is disposed in the tower body; and

[0022] A spray assembly is disposed inside the tower body and above the gas inlet. The spray assembly is used to spray absorbent liquid downward or diagonally downward.

[0023] The chlorine-containing waste gas treatment device provided in this embodiment of the invention has a gas inlet located in the tower body to allow the oxidized waste gas to be treated to enter the absorption tower. The spray assembly is used to spray absorbent liquid downwards or diagonally downwards, allowing the absorbent liquid to react and absorb the oxidized waste gas, thereby achieving secondary absorption treatment of the oxidized waste gas.

[0024] Preferably, the absorption tower further includes a Venturi tube, which is vertically arranged inside the tower body and located below the spray assembly. The throat of the Venturi tube has an oxidation waste gas inlet, which is connected to the gas inlet.

[0025] The tower body includes an absorbent liquid zone located at the lower part of the tower body, and the lower end of the venturi tube extends into the absorbent liquid zone.

[0026] The chlorine-containing waste gas treatment device provided in this embodiment of the invention includes a venturi tube in the absorption tower, with the lower end of the venturi tube extending into the absorbent liquid zone. The high-temperature, oxidized waste gas is introduced into the interior of the venturi tube from its throat. The absorbent liquid inside the venturi tube rises under the suction effect of the pressure difference; thus, the waste gas is directly introduced into the absorbent liquid inside the venturi tube, achieving cooling and initial absorption within the venturi tube. This prevents water vapor in the high-temperature, oxidized waste gas from reacting with hydrogen chloride gas to form highly corrosive hydrochloric acid when the temperature is below the dew point, which would corrode the spray assembly.

[0027] Preferably, the absorbent liquid zone further has an absorbent liquid outlet;

[0028] The absorption tower also includes:

[0029] A connecting pipe, wherein the connecting pipe connects the spray assembly and the absorbent outlet, is used to circulate the absorbent in the absorbent zone to the spray assembly; and

[0030] A pump, which is installed in the connecting pipe, is used to pump the absorbent liquid to the spray assembly.

[0031] The chlorine-containing waste gas treatment device provided in this embodiment of the invention uses the connecting pipe and the pump to achieve the circulation and spraying of the absorbent liquid within the tower body.

[0032] Preferably, the spray assembly includes:

[0033] The nozzle is connected to the connecting pipe; and

[0034] Multiple nozzles are disposed on the nozzle pipe, and the nozzles spray the absorbent liquid downward or diagonally downward;

[0035] Preferably, the absorption tower includes a plurality of spray components, which are arranged at intervals.

[0036] The chlorine-containing waste gas treatment device provided in this embodiment of the invention uses nozzles to spray the absorbent liquid downwards or diagonally downwards to achieve the spray absorption of the oxidized waste gas. The absorption tower includes multiple spaced-apart spray pipes, which makes the spraying of the spraying assembly more uniform and improves the spray absorption efficiency of the absorption tower for the oxidized waste gas.

[0037] Preferably, the tower body further comprises:

[0038] Slag discharge port, wherein the slag discharge port is located at the lower part of the tower body; and

[0039] An exhaust port is located at the top of the tower body.

[0040] The chlorine-containing waste gas treatment device provided by this utility model has a slag discharge port for discharging solid waste slag from the absorption tower, and an exhaust port for discharging treated waste gas that meets the standards. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a chlorine-containing waste gas treatment device provided in one embodiment of the present invention;

[0042] Figure 2 This is another structural schematic diagram of the chlorine-containing waste gas treatment device provided in one embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the reactor provided in one embodiment of the present invention;

[0044] Figure 4 yes Figure 3 The diagram shows a cross-sectional view of the reactor along line AA.

[0045] Figure 5 yes Figure 3 The diagram shows a cross-sectional view of the reactor along line BB.

[0046] Figure 6 yes Figure 2 A partially enlarged schematic diagram of part I of the chlorine-containing waste gas treatment device shown;

[0047] Figure 7 This is a schematic diagram of the structure of the absorption tower provided in one embodiment of the present invention;

[0048] Figure 8 yes Figure 7 A partially enlarged schematic diagram of section II of the absorption tower shown.

[0049] Explanation of reference numerals in the attached figures

[0050] 1-Chlorine-containing waste gas treatment device, 101-Mixing component, 102-Catalyst, 110-Reactor, 111-Mixing chamber, 112-Reaction chamber, 113-Baffle, 120-Absorption tower, 121-Tower body, 122-Spray assembly, 123-Venturi tube, 124-Connecting pipe, 125-Pump, 130-Preheater, 1211-Absorption liquid zone, 1221-Spray pipe, 1222-Nozzle, 1231-Throat, 111a-Hot gas inlet, 111b-Waste gas inlet, 112a-Gas outlet, 113a-Ventilation hole, 121a-Gas inlet, 121b-Absorption liquid outlet, 121c-Slag discharge port, 121d-Exhaust port, 123a-Oxidation waste gas inlet, 130a-Hot gas outlet. Detailed Implementation

[0051] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0052] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0054] Please see Figure 1 , Figure 1This is a schematic diagram of a chlorine-containing waste gas treatment device according to an embodiment of the present invention. The chlorine-containing waste gas treatment device 1 provided by this embodiment includes a reactor 110 and an absorption tower 120. The reactor 110 includes a mixing chamber 111 and a reaction chamber 112 connected to each other. The mixing chamber 111 has a hot gas inlet 111a and a waste gas inlet 111b, and is configured to mix hot air entering through the hot gas inlet 111a and the waste gas inlet 111b with the waste gas to be treated. The reaction chamber 112 is used to oxidize the mixed gas from the mixing chamber 111, and has a gas outlet 121a. The absorption tower 120 has a gas inlet connected to the gas outlet 121a, and is used to absorb chlorine-containing pollutants from the gas from the reaction chamber 112.

[0055] The chlorine-containing waste gas treatment device 1 includes a reactor 110 and an absorption tower 120. Understandably, the chlorine-containing waste gas to be treated undergoes an oxidation reaction in the reaction chamber 112, thereby achieving primary oxidation treatment of the waste gas. Understandably, the gas oxidized in the reactor 110 undergoes absorption of chlorine-containing pollutants in the absorption tower 120, thereby achieving secondary absorption treatment of the waste gas.

[0056] To more clearly illustrate the beneficial effects of the technical solution of this embodiment, the relevant technologies are further introduced here. In the relevant technologies, when using catalytic oxidation to treat chlorine-containing waste gas, the chlorine-containing waste gas to be treated needs to be mixed with air first, and the mixed gas is then passed into a preheating chamber for heating. The mixed gas heated to the target temperature is then passed into the reaction chamber 112 for catalytic oxidation, so that the oxygen in the air and the CVOCs in the chlorine-containing waste gas can be oxidized to generate pollution-free CO2, H2O and HCl, thereby achieving the catalytic oxidation treatment of chlorine-containing waste gas.

[0057] However, the related technologies for treating chlorine-containing waste gas have the following problems: during the heating process, some hydrogen chloride gas is released, and the air mixed with the chlorine-containing waste gas contains water vapor. These gases containing hydrogen chloride and water vapor pose a risk of corrosion to the equipment. When the gas temperature is below the water dew point, these hydrogen chloride molecules dissolve in water to form highly corrosive hydrochloric acid, which condenses on the walls and pipes, causing severe corrosion to the heaters and pipelines.

[0058] To address the above problems, the present invention provides a chlorine-containing waste gas treatment device 1. The reactor 110 includes a mixing chamber 111 and a reaction chamber 112 that are interconnected. The mixing chamber 111 has a hot air inlet 111a and a waste gas inlet 111b. Understandably, the mixing chamber 111 is used to mix hot air entering through the hot air inlet 111a and the waste gas to be treated entering through the waste gas inlet 111b. While the hot air and the waste gas to be treated are fully mixed, the hot air further heats the waste gas to be treated, so that the mixed gas reaches the target temperature for the catalytic oxidation reaction. This avoids the problem in related technologies where heating the air and chlorine-containing waste gas mixture causes hydrochloric acid corrosion of the heater and pipelines.

[0059] It should be noted that the hot air mentioned in this utility model refers to air with a temperature t that satisfies 300℃≤t≤500℃. It can be understood that any air temperature t0 detected inside the mixing chamber 111 at the heater outlet or the hot air inlet 111a that satisfies 300℃≤t0≤500℃ will fall within the protection scope of this utility model.

[0060] The reaction chamber 112 is used to oxidize the mixed gas from the mixing chamber 111. In an optional embodiment, a catalyst 102 is provided in the reaction chamber 112 to accelerate the oxidation rate of the waste gas to be treated. Optionally, the catalyst 102 is a noble metal catalyst. The noble metal catalyst can be, but is not limited to, a Pt noble metal catalyst, a Pd noble metal catalyst, a Rh noble metal catalyst, or a Ru noble metal catalyst. The noble metal catalyst can be, but is not limited to, using CeO2, Al2O3, TiO2, or molecular sieves as a support. The above are examples of the catalyst 102 provided in the reaction chamber 112 according to the embodiments of this utility model, and should not be construed as limiting the catalyst 102 provided in the reaction chamber 112 according to the embodiments of this utility model.

[0061] The reaction chamber 112 has a gas outlet 121a. The absorption tower 120 has a gas inlet, which is connected to the gas outlet 121a. Understandably, the chlorine-containing waste gas treatment device 1 may also include a pipeline connecting the gas inlet and the gas outlet 112a.

[0062] The absorption tower 120 is used to absorb chlorine-containing pollutants from the gas in the reaction chamber 112. Understandably, the absorption tower 120 is provided with an absorbent liquid, which is an alkaline liquid, used to react with the oxidized waste gas from the reactor 110 to absorb hydrogen chloride gas from the oxidized waste gas, thereby reducing the pollution of the oxidized waste gas.

[0063] In one optional embodiment, the absorbent is a sodium hydroxide absorbent. The sodium hydroxide absorbent can be, but is not limited to, a sodium hydroxide absorbent with a concentration C satisfying 2wt% ≤ C ≤ 5wt%. The above are examples of the absorbent in the absorption tower 120 provided by this embodiment of the invention, and should not be construed as limiting the absorbent in the absorption tower 120 provided by this embodiment of the invention.

[0064] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the utility model includes a reactor 110 for oxidizing the waste gas to be treated, achieving primary treatment of the waste gas, and an absorption tower 120 for absorbing chlorine-containing pollutants in the oxidized waste gas, achieving secondary treatment of the waste gas. The reactor 110 includes a mixing chamber 111 and a reaction chamber 112 that are interconnected; the mixing chamber 111 mixes the waste gas to be treated with air, and the reaction chamber 112 oxidizes the waste gas. The mixing chamber 111 has a hot gas inlet 111a and a waste gas inlet 111b. When the chlorine-containing waste gas treatment device 1 provided by this invention is used to treat chlorine-containing waste gas, the waste gas to be treated enters the mixing chamber 111 through the waste gas inlet 111b and mixes with the hot air entering the mixing chamber 111 through the hot gas inlet 111a, thereby being heated by the hot air to improve the oxidation efficiency of the waste gas to be treated. This avoids the related technologies where the waste gas to be treated is first mixed with air and then the mixed gas is passed into a preheating device for heating, which generates hydrogen chloride and water vapor that corrodes the preheating device and pipelines during the heating process. The gas inlet and the gas outlet 121a together connect the reaction chamber 112 and the absorption tower 120, thereby further enabling the waste gas oxidized in the reaction chamber 112 to be passed into the absorption tower 120 for secondary treatment to degrade the chlorine-containing pollutants in the waste gas.

[0065] Please see Figure 2 , Figure 2 This is another structural schematic diagram of the chlorine-containing waste gas treatment device provided in one embodiment of the present invention. In a preferred embodiment, the chlorine-containing waste gas treatment device 1 further includes a preheater 130. The preheater 130 is located upstream of the reactor 110 and is used to heat air to form hot air. The preheater 130 has a hot air outlet 130a, which is connected to the hot air inlet 111a.

[0066] The preheater 130 is located upstream of the reactor 110 and is used to heat air to form the hot air. Understandably, the preheater 130 supplies the hot air to the mixing chamber 111.

[0067] The preheater 130 has a hot gas outlet 130a, which is connected to the hot gas inlet 111a. Understandably, the chlorine-containing waste gas treatment device 1 may also include a pipe connecting the hot gas inlet 111a and the hot gas outlet 130a.

[0068] In the chlorine-containing waste gas treatment device 1 provided by this embodiment of the invention, the preheater 130 heats the air. The hot air outlet 130a is connected to the hot air inlet 111a to provide hot air to the reactor 110, thereby further avoiding the related technology of first mixing the waste gas to be treated with air and then passing the mixed gas into the preheating device for heating, which generates hydrogen chloride and water vapor during the heating process, corroding the preheating device and pipelines.

[0069] Please refer to it again. Figure 2 And please see Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the reactor provided in one embodiment of the present invention; Figure 4 yes Figure 3 The diagram shows a cross-sectional view of the reactor along line AA. In a preferred embodiment, the reactor 110 further includes a partition 113; in another preferred embodiment, a mixing element 101 is provided in the mixing chamber 111. The partition 113 separates the mixing chamber 111 from the reaction chamber 112, and the partition 113 has a vent 113a that connects the mixing chamber 111 and the reaction chamber 112. The mixing element 101 is used to mix the hot air entering through the hot air inlet 111a and the waste gas inlet 111b with the waste gas to be treated.

[0070] The reactor 110 further includes a partition 113, which separates the mixing chamber 111 from the reaction chamber 112. The partition 113 has a vent hole 113a. Understandably, when the chlorine-containing waste gas treatment device 1 provided in this embodiment of the invention is used to treat chlorine-containing waste gas, the waste gas to be treated and hot air are respectively introduced into the mixing chamber 111 through the hot air inlet 111a and the waste gas inlet 111b, and are uniformly mixed within the mixing chamber 111. The mixed gas then enters the reaction chamber 112 through the vent hole 113a for oxidation treatment. The partition 113 separates the mixing chamber 111 and the reaction chamber 112 into two relatively independent spaces, allowing the hot air and the waste gas to be treated to be fully mixed, and the waste gas to be treated is fully heated by the hot air before entering the reaction chamber 112, thereby increasing the reaction rate of the mixed gas within the reaction chamber 112.

[0071] A mixing element 101 is provided inside the mixing chamber 111. The mixing element 101 can be, but is not limited to, a granular mixing element or a fibrous mixing element. In an optional embodiment, the mixing element 101 fills the entire interior of the mixing chamber, and the hot air and the waste gas to be treated are uniformly mixed through the gaps in the mixing element 101, and then enter the reaction chamber 112 through the vent 113a.

[0072] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the invention includes a partition 113 that separates the mixing chamber 111 and the reaction chamber 112. A vent 113a connects the mixing chamber 111 and the reaction chamber 112. A mixing element 101 is provided inside the mixing chamber 111 to ensure more uniform mixing of the waste gas to be treated and the hot air.

[0073] Please refer to it again. Figure 3 and Figure 4 In a preferred embodiment, the partition 113 has a plurality of vent holes, which are evenly distributed on the partition 113.

[0074] It is important to note that Figure 4 The cross-sectional view of reactor 110 shown is only a possible schematic diagram of the distribution number and position of vent holes 113a of the partition 113 provided in this embodiment of the present invention, and should not be construed as a limitation on the distribution number and position of vent holes 113a of the partition 113 provided in this embodiment of the present invention. Furthermore, the cross-section of the vent holes 113a provided in this embodiment of the present invention is not limited to a circle, but can also be square, triangular, hexagonal, or other irregular shapes.

[0075] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the utility model has a plurality of ventilation holes evenly distributed on the partition plate 113, so that the gas introduced into the reaction chamber 112 is evenly distributed in the reaction chamber 112.

[0076] Please refer to it again. Figure 2 and Figure 3 And please see Figure 5 , Figure 5 yes Figure 4 The diagram shows a cross-sectional view of the reactor along line BB. In a preferred embodiment, the mixing chamber 111 has one hot gas inlet 111a and multiple waste gas inlets 111b. The hot gas inlet 111a is located at the middle of the side of the mixing chamber 111 facing away from the reaction chamber 112, and the multiple waste gas inlets 111b are evenly distributed around the hot gas inlet 111a.

[0077] It is important to note that Figure 5The cross-sectional view of reactor 110 shown is only a possible schematic diagram of the distribution, size, and shape of the hot gas inlet 111a and the exhaust gas inlet 111b on one side of the mixing chamber 111 provided in this embodiment of the present invention, and should not be construed as a limitation on the distribution, size, and shape of the hot gas inlet 111a and the exhaust gas inlet 111b on one side of the mixing chamber 111 provided in this embodiment of the present invention. Furthermore, the number of exhaust gas inlets 111b provided in this embodiment of the present invention is not limited to 54; as long as multiple exhaust gas inlets 111b are evenly distributed around the hot gas inlet 111a, they will fall within the protection scope of this invention.

[0078] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the utility model has the waste gas inlet 111b evenly distributed around the hot gas inlet 111a, so that the hot air and the waste gas to be treated are mixed more evenly in the mixing chamber 111.

[0079] Please refer to it again. Figure 2 And please see Figure 6 , Figure 6 yes Figure 2 The diagram shows a partially enlarged view of part I of the chlorine-containing waste gas treatment device. In a preferred embodiment, the absorption tower 120 includes a tower body 121 and a spray assembly 122. The gas inlet is located in the tower body 121; the spray assembly 122 is located inside the tower body 121 and above the gas inlet, and is used to spray absorbent liquid downwards or diagonally downwards.

[0080] Understandably, the tower body 121 is a closed shell. The tower body 121 may include sidewalls, the gas inlet is located on the lower part of the sidewalls, and the spray assembly 122 is located above the gas inlet.

[0081] When the chlorine-containing waste gas treatment device 1 treats the chlorine-containing waste gas, the waste gas that has been oxidized in the reaction chamber 112 enters the tower body 121 through the gas inlet. Under pressure, the oxidized gas moves from bottom to top in the tower body 121 toward the spray assembly 122. The spray assembly 122 sprays absorbent liquid downwards or diagonally downwards, and the absorbent liquid absorbs the oxidized gas, thereby absorbing the hydrogen chloride in the oxidized gas.

[0082] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the invention has a gas inlet located in the tower body 121 to allow the oxidized waste gas to be treated to enter the absorption tower 120. The spray assembly 122 is used to spray absorbent liquid downwards or diagonally downwards, so that the absorbent liquid reacts with the oxidized waste gas to achieve secondary absorption treatment of the oxidized waste gas.

[0083] Please refer to it again. Figure 6 And please see Figure 7 , Figure 7 This is a schematic diagram of the absorption tower provided in one embodiment of the present invention. In a preferred embodiment, the absorption tower 120 further includes a Venturi tube 123, which is vertically disposed within the tower body 121 and located below the spray assembly 122. The throat 1231 of the Venturi tube 123 has an oxidation waste gas port 123a, which communicates with the gas inlet. The tower body 121 includes an absorption liquid zone 1211, which is located in the lower part of the tower body 121, and the lower end of the Venturi tube 123 extends into the absorption liquid zone 1211.

[0084] The Venturi tube 123 is vertically disposed within the tower body 121, with its lower end extending into the absorbent liquid zone 1211. Understandably, the Venturi tube 123 comprises, from top to bottom, an upper part, a throat 1231, and a lower part, with the lower part of the Venturi tube 123 located below the surface of the absorbent liquid within the tower body 121.

[0085] The throat 1231 of the Venturi tube 123 has an oxidation waste gas port 123a, which is connected to the gas inlet. Understandably, the oxidized gas exits from the gas outlet 121a of the reaction chamber 112, passes through the gas inlet of the tower body 121, and reaches the oxidation waste gas port 123a of the Venturi tube 123. In an optional embodiment, the chlorine-containing waste gas treatment device 1 may further include a pipe, one end of which is connected to the gas outlet 121a, and the other end extends from the gas inlet into the tower body 121 and is connected to the oxidation waste gas port 123a.

[0086] The tower body 121 includes an absorbent liquid zone 1211, which is located at the lower part of the tower body 121. Understandably, the tower body 121 is a closed shell, with the absorbent liquid contained in its lower part, forming the absorbent liquid zone 1211. The gas inlet is located on the side wall of the tower body 121 above the absorbent liquid zone 1211.

[0087] Understandably, the oxidized waste gas is a high-temperature gas containing a large amount of hydrogen chloride gas and water vapor. If the oxidized waste gas is directly introduced into the tower without the Venturi tube 123, when the temperature of the water vapor is lower than its dew point temperature, the hydrogen chloride gas dissolves in water to form a highly corrosive hydrochloric acid solution, which can easily corrode the spray assembly 122 inside the tower 121.

[0088] The chlorine-containing waste gas treatment device 1 provided in this embodiment treats chlorine-containing waste gas. In the reaction chamber 112, the gas, after oxidation treatment, enters the throat 1231 of the venturi tube 123 through the gas outlet 121a, gas inlet, and oxidation waste gas outlet 123a. Because the oxidized gas has a high temperature, while the absorbent liquid in the tower body 121 has a low temperature, under pressure, the liquid level of the absorbent liquid inside the venturi tube 123 rises above the throat 1231. The oxidized waste gas entering the throat 1231 is then directly fed into the absorbent liquid in the venturi tube 123. The absorbent liquid absorbs the oxidized gas once and simultaneously cools it. The gas, after one absorption, moves upwards from bottom to top within the tower body 121 towards the spray assembly 122 under pressure. The spray assembly 122 sprays absorbent liquid downwards or diagonally downwards, which absorbs the oxidized gas, thereby absorbing hydrogen chloride gas from the oxidized gas.

[0089] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the invention includes an absorption tower 120 further comprising a Venturi tube 123, the lower end of which extends into the absorption liquid zone 1211. The high-temperature oxidized waste gas to be treated is introduced into the interior of the Venturi tube 123 through the throat 1231. The absorbent liquid inside the Venturi tube 123 rises under the suction effect of the pressure difference, allowing the waste gas to be treated to be directly introduced into the absorbent liquid within the Venturi tube 123, achieving cooling and initial absorption within the Venturi tube 123. This prevents water vapor in the high-temperature oxidized waste gas from reacting with hydrogen chloride gas to form highly corrosive hydrochloric acid when the temperature is below the dew point, thus preventing corrosion of the spray assembly 122.

[0090] Please refer to it again. Figure 6 and Figure 7 In a preferred embodiment, the absorbent zone 1211 further includes an absorbent outlet 121b. The absorber tower 120 also includes a connecting pipe 124 and a pump 125. The connecting pipe 124 connects the spray assembly 122 and the absorbent outlet 121b, and is used to circulate the absorbent in the absorbent zone 1211 to the spray assembly 122; the pump 125 is disposed on the connecting pipe 124 and is used to pump the absorbent to the spray assembly 122.

[0091] The absorbent zone 1211 also has an absorbent outlet 121b. Understandably, the tower body 121 may also include a sidewall, and the absorbent outlet 121b is disposed on the sidewall corresponding to the absorbent zone 1211.

[0092] The absorption tower 120 also includes a connecting pipe 124 and a pump 125. Understandably, the connecting pipe 124 and the pump 125 are located outside the tower body 121, and the spray assembly 122 is located inside the tower body 121.

[0093] The connecting pipe 124 connects the spray assembly 122 to the absorbent outlet 121b, and the pump 125 is disposed on the connecting pipe 124. Understandably, the absorption tower 120 includes a plurality of the connecting pipes 124, one of which connects the pump 125 to the absorbent outlet 121b, and at least one of the absorption pipes passes through the side wall of the tower body 121 and connects the pump 125 to the spray assembly 122.

[0094] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the utility model uses the connecting pipe 124 and the pump 125 to achieve the circulation and spraying of the absorbent liquid in the tower body 121.

[0095] Please refer to it again. Figure 7 And please see Figure 8 , Figure 8 yes Figure 7 The diagram shows a partially enlarged view of part II of the absorption tower. In a preferred embodiment, the spray assembly 122 includes a spray pipe 1221 and a plurality of nozzles 1222; in a preferred embodiment, the absorption tower 120 includes a plurality of the spray assemblies 122. The spray pipe 1221 is connected to the connecting pipe 124; the nozzles 1222 are disposed on the spray pipe 1221, and the nozzles 1222 spray the absorbent liquid downwards or diagonally downwards. The plurality of spray assemblies 122 are arranged vertically at intervals.

[0096] The spray assembly 122 includes a spray pipe 1221 and a plurality of nozzles 1222. It is understood that the spray pipe 1221 is located inside the tower body 121 and is connected to the connecting pipe 124 outside the tower body 121. The plurality of nozzles 1222 are disposed on the spray pipe 1221. The absorbent liquid is delivered via the connecting pipe 124 to the spray pipe 1221 and then sprayed downwards from the nozzles 1222 towards the bottom of the tower body 121 to absorb the oxidized gas. Optionally, the plurality of nozzles 1222 are evenly distributed on the spray pipe 1221.

[0097] The absorption tower 120 includes a plurality of spray assemblies 122, which are arranged vertically at intervals. In an optional embodiment, the plurality of spray assemblies 122 are arranged at intervals along the height direction of the absorption tower 120, and the plurality of nozzles 1222 are distributed in a plane parallel to the height of the absorption tower 120. The above are examples of the arrangement of the spray assemblies 122 and nozzles 1222 provided in the embodiments of the present invention, and should not be construed as limiting the arrangement of the spray assemblies 122 and nozzles 1222 provided in the embodiments of the present invention.

[0098] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the invention includes a spray pipe 1221 that delivers absorbent liquid from the circulation pipe to a nozzle 1222. The nozzle 1222 sprays the absorbent liquid downwards or diagonally downwards to achieve the spray absorption of the oxidized waste gas. The absorption tower 120 includes multiple spray pipes 1221 arranged at intervals, making the spraying of the spray assembly 122 more uniform and improving the spray absorption efficiency of the absorption tower 120 for the oxidized waste gas.

[0099] Please refer to it again. Figure 7 In a preferred embodiment, the tower body 121 further includes a slag discharge port 121c and an exhaust port 121d. The slag discharge port 121c is located at the lower part of the tower body 121, and the exhaust port 121d is located at the top of the tower body 121.

[0100] The tower body 121 also has a slag discharge port 121c, which is located at the lower part of the tower body 121. It is understood that the slag discharge port 121c is used to discharge solid waste that has reacted and deposited in the absorbent liquid zone 1211 within the tower body 121. It is understood that the tower body 121 includes a bottom wall and peripheral side walls, and the slag discharge port 121c is located on the peripheral side wall near the bottom wall.

[0101] The tower body 121 also has an exhaust port 121d, which is located at the lower part of the tower body 121. Understandably, the exhaust port 121d is used to discharge treated gas that meets the standards.

[0102] In an optional embodiment, the tower body 121 further includes a replenishment port (not shown in the drawings). The replenishment port can be located at the top of the tower body 121 or on its side wall. The replenishment port is used to replenish the absorbent. During the absorption process of the waste gas to be treated in the absorption tower 120, the absorbent reacts with the waste gas, causing the concentration of the absorbent to decrease. When the concentration of the absorbent does not meet the target concentration, the absorbent can be replenished through the replenishment port to ensure the waste gas treatment effect.

[0103] The chlorine-containing waste gas treatment device 1 provided in this embodiment of the utility model has a slag discharge port 121c for discharging solid waste slag from the tower body 121 of the absorption tower 120; and an exhaust port 121d for discharging the treated waste gas that meets the standards.

[0104] Those skilled in the art should understand that the above embodiments or implementation methods are for illustrative purposes only and are not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or implementation methods or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the different embodiments or implementation methods can be combined in any way.

Claims

1. A chlorine-containing waste gas treatment device (1), characterized in that, The chlorine-containing waste gas treatment device (1) includes: A reactor (110) includes a mixing chamber (111) and a reaction chamber (112) in communication with each other. The mixing chamber (111) has a hot gas inlet (111a) and a waste gas inlet (111b). The mixing chamber (111) is configured to mix hot air entering through the hot gas inlet (111a) and the waste gas inlet (111b) with waste gas to be treated. The reaction chamber (112) is used to oxidize the mixed gas from the mixing chamber (111). The reaction chamber (112) has a gas outlet (112a). An absorption tower (120) having a gas inlet (121a) connected to a gas outlet (112a) is used to absorb chlorine-containing pollutants from the gas from the reaction chamber (112).

2. The chlorine-containing waste gas treatment device (1) according to claim 1, characterized in that, The chlorine-containing waste gas treatment device (1) further includes a preheater (130), which is located upstream of the reactor and is used to heat the air to form the hot air. The preheater (130) has a hot air outlet (130a) which is connected to the hot air inlet (111a).

3. The chlorine-containing waste gas treatment device (1) according to claim 1, characterized in that, The reactor (110) further includes a partition (113) separating the mixing chamber (111) from the reaction chamber (112), the partition (113) having a vent (113a) communicating between the mixing chamber (111) and the reaction chamber (112); and / or The mixing chamber (111) is provided with a mixing element (101), which is used to mix the hot air entering through the hot air inlet (111a) and the waste gas inlet (111b) with the waste gas to be treated.

4. The chlorine-containing waste gas treatment device (1) according to claim 3, characterized in that, The partition (113) has a plurality of vent holes (113a), which are evenly distributed on the partition (113).

5. The chlorine-containing waste gas treatment device (1) according to any one of claims 1-4, characterized in that, The mixing chamber (111) has one hot gas inlet (111a) and multiple exhaust gas inlets (111b). The hot gas inlet (111a) is located in the middle of the mixing chamber (111) on the side away from the reaction chamber (112), and the multiple exhaust gas inlets (111b) are evenly distributed around the hot gas inlet (111a).

6. The chlorine-containing waste gas treatment device (1) according to any one of claims 1-4, characterized in that, The absorption tower (120) includes: The gas inlet (121a) is disposed in the tower body (121); and A spray assembly (122) is disposed inside the tower body (121) and above the gas inlet (121a). The spray assembly (122) is used to spray the absorbent liquid downward or diagonally downward.

7. The chlorine-containing waste gas treatment device (1) according to claim 6, characterized in that, The absorption tower (120) also includes a venturi tube (123), which is vertically arranged inside the tower body (121) and located below the spray assembly (122). The throat (1231) of the venturi tube (123) has an oxidation waste gas inlet (123a), which is connected to the gas inlet (121a). The tower body (121) includes an absorption liquid zone (1211), which is located at the lower part of the tower body (121), and the lower end of the Venturi tube (123) extends into the absorption liquid zone (1211).

8. The chlorine-containing waste gas treatment device (1) according to claim 7, characterized in that, The absorbent zone (1211) also has an absorbent outlet (121b); The absorption tower (120) also includes: A connecting pipe (124) connects the spray assembly (122) and the absorbent outlet (121b) for circulating the absorbent in the absorbent zone (1211) to the spray assembly (122); and Pump (125), which is disposed in the connecting pipe (124), is used to draw the absorbent liquid to the spray assembly (122).

9. The chlorine-containing waste gas treatment device (1) according to claim 8, characterized in that, The spray assembly (122) includes: Nozzle (1221), the nozzle (1221) being connected to the connecting pipe (124); and Multiple nozzles (1222) are disposed on the nozzle (1221), and the nozzles (1222) spray the absorbent liquid downward or obliquely downward; and / or The absorption tower (120) includes a plurality of spray components (122), which are arranged at intervals.

10. The chlorine-containing waste gas treatment device (1) according to claim 7, characterized in that, The tower body (121) also has: A slag discharge port (121c) is provided at the lower part of the tower body (121); and An exhaust port (121d) is located at the top of the tower body (121).

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