Electric heating and combustion combined waste gas treatment method and equipment
By combining flame combustion and electric heating technology in the reaction chamber of the exhaust gas treatment equipment, the problem of high temperature instability in traditional equipment is solved, the waste gas treatment efficiency is improved and energy saving is saved.
Patent Information
- Application Number
- CN202411973250.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-03-28
AI Technical Summary
In traditional exhaust gas treatment equipment, it is difficult to maintain the high temperature in the reaction chamber for flame combustion, resulting in insufficient reaction of exhaust gas and reducing treatment efficiency.
The combination of electric heating and combustion is adopted, and flame combustion and electric heating are combined in the reaction chamber to ensure that the entire space is a high-temperature area and meet the temperature requirements of exhaust gas chemical reactions.
It improves the exhaust gas treatment efficiency of the exhaust gas treatment equipment, saves energy, and ensures temperature uniformity and high efficiency in the reaction chamber.
Smart Images
Figure CN119713291A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of waste gas treatment, and in particular to a waste gas treatment method and equipment combining electric heating and combustion. Background Art
[0002] In the process of industrial production, in order to reduce the emission of harmful gases, it is necessary to use waste gas treatment equipment to treat the waste gas generated by industrial production before the waste gas that no longer contains harmful gases can be discharged into the air. For example, in the semiconductor industry, the waste gas generated by wafer processing will be input into the reaction chamber of the waste gas treatment equipment, so that the waste gas can undergo chemical reactions inside the reaction chamber to eliminate the harmful gases contained in the waste gas. Among them, the waste gas treatment volume per unit time is the key factor in evaluating the quality of a waste gas treatment equipment, and the factors affecting the waste gas treatment volume per unit time are mainly whether the temperature in the reaction chamber can maintain high temperature and stability.
[0003] At present, in traditional waste gas treatment equipment, flame combustion is usually used to maintain the temperature in the reaction chamber, and a combustion burner installed in the reaction chamber is used to spray flames from the center of the top of the reaction chamber downward to the waste gas entering the reaction chamber. However, due to the influence of the injection pressure of the fuel and oxidant, the flame is sprayed downward in the reaction chamber and cannot spread directly at the burner outlet, and the waste gas is also directly injected into the reaction chamber from the top of the reaction chamber, and its injection speed is also very fast. Therefore, the temperature at the top of the reaction chamber is low, and it is easy to form a low-temperature area with a temperature lower than the reaction temperature required for the waste gas biochemical reaction, which causes the waste gas to react insufficiently in the reaction chamber, reducing the waste gas treatment efficiency of the waste gas treatment equipment. Summary of the invention
[0004] In view of this, the purpose of the present application is to provide a waste gas treatment method and equipment that combines electric heating and combustion. By combining flame combustion with electric heating inside the reaction chamber, it can ensure that the entire space inside the reaction chamber is a high-temperature area, meeting the reaction temperature required for the chemical reaction of the waste gas, which is beneficial to improving the waste gas treatment efficiency of the waste gas treatment equipment, and while improving the waste gas treatment efficiency, it is also beneficial to save energy.
[0005] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings.
[0006] In a first aspect, an embodiment of the present application provides a waste gas treatment method combining electric heating and combustion, which is applied to a waste gas treatment device, wherein the waste gas treatment device comprises: a waste gas inlet, a cover plate, and a reaction chamber; wherein the waste gas inlet enters the interior of the closed reaction chamber through the cover plate; the waste gas treatment method comprises:
[0007] receiving the exhaust gas through the exhaust gas inlet and inputting the received exhaust gas into the interior of the reaction chamber;
[0008] Inside the reaction chamber, a reaction temperature required for a chemical reaction to occur is provided for the waste gas flowing into the reaction chamber by combining flame combustion with electric heating;
[0009] The waste gas after the chemical reaction in the reaction chamber is discharged from the waste gas treatment equipment through the reaction chamber outlet of the reaction chamber.
[0010] In a second aspect, an embodiment of the present application provides an exhaust gas treatment device combining electric heating and combustion, the exhaust gas treatment device comprising: an exhaust gas inlet, a cover plate, and a reaction chamber; wherein the exhaust gas inlet enters the interior of the closed reaction chamber through the cover plate;
[0011] The exhaust gas inlet is used to receive the exhaust gas and input the received exhaust gas into the interior of the reaction chamber;
[0012] The reaction chamber is used to provide the exhaust gas flowing into the reaction chamber with a reaction temperature required for a chemical reaction to occur by combining flame combustion with electric heating;
[0013] The waste gas after the chemical reaction in the reaction chamber is discharged from the waste gas treatment equipment through the reaction chamber outlet of the reaction chamber.
[0014] The technical solution provided by the embodiments of the present application may have the following beneficial effects:
[0015] The embodiments of the present application provide a waste gas treatment method and equipment that combines electric heating and combustion. By combining flame combustion with electric heating inside the reaction chamber, it is possible to ensure that the entire space inside the reaction chamber is a high-temperature area, satisfying the reaction temperature required for the chemical reaction of the waste gas, which is beneficial to improving the waste gas treatment efficiency of the waste gas treatment equipment, and while improving the waste gas treatment efficiency, it is also beneficial to saving energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 A schematic diagram of a waste gas treatment method combining electric heating and combustion provided in an embodiment of the present application is shown;
[0018] Figure 2 A schematic diagram of the structure of an exhaust gas treatment device combining electric heating and combustion provided in an embodiment of the present application is shown;
[0019] Figure 3 A schematic diagram of the structure of an electric heating chamber provided in an embodiment of the present application is shown;
[0020] Figure 4 A side schematic diagram of an electric heating chamber provided in an embodiment of the present application is shown. DETAILED DESCRIPTION
[0021] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.
[0022] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.
[0023] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.
[0024] To facilitate understanding of the embodiments of the present application, a waste gas treatment method and device combining electric heating and combustion provided in the embodiments of the present application are introduced in detail below.
[0025] Reference Figure 1 As shown, Figure 1A schematic flow chart of an exhaust gas treatment method combining electric heating and combustion provided in an embodiment of the present application is shown, wherein the exhaust gas treatment method is applied to an exhaust gas treatment device, the exhaust gas treatment device comprising: an exhaust gas inlet, a cover plate and a reaction chamber; the exhaust gas treatment method comprises the following steps S101-S103, specifically:
[0026] S101, receiving exhaust gas through the exhaust gas inlet, and inputting the received exhaust gas into the interior of the reaction chamber.
[0027] Here, the above-mentioned waste gas treatment equipment is a waste gas treatment equipment combining electric heating and combustion provided in the embodiment of the present application, wherein: Figure 2 The schematic diagram of the structure of an exhaust gas treatment device combining electric heating and combustion provided in an embodiment of the present application is shown as follows: Figure 2 As shown, the exhaust gas treatment equipment includes: an exhaust gas inlet, a cover plate and a reaction chamber. The exhaust gas inlet enters the interior of the closed reaction chamber through the cover plate, so that the exhaust gas inlet can input the received exhaust gas into the interior of the reaction chamber, and treat the exhaust gas inside the reaction chamber (i.e., make the exhaust gas undergo a chemical reaction inside the reaction chamber).
[0028] S102, inside the reaction chamber, by combining flame combustion with electric heating, providing the exhaust gas flowing into the reaction chamber with a reaction temperature required for a chemical reaction to occur.
[0029] Here, reference Figure 2 The exhaust gas treatment device shown in the figure further includes: a flame inlet and a combustion nozzle (not shown in the figure), wherein, similar to the exhaust gas inlet, the flame inlet also enters the interior of the closed reaction chamber through the cover plate, and the above-mentioned combustion burner is installed at the flame inlet. The combustion burner can spray flame downward through the flame inlet at the top of the reaction chamber, so that the sprayed flame will enter the interior of the reaction chamber through the flame inlet (the flame shape can be referred to Figure 2 shown).
[0030] Specifically, the "flame combustion" in step S102 can be specifically expressed as: spraying flames into the reaction chamber through the flame inlet of the above-mentioned combustion burner to provide the exhaust gas flowing into the reaction chamber with the reaction temperature required for the chemical reaction; that is, inside the reaction chamber, since the exhaust gas needs to ensure that the ambient temperature can reach the reaction temperature when the chemical reaction occurs, and the increase in temperature is also conducive to increasing the speed of the chemical reaction of the exhaust gas, therefore, inside the reaction chamber, the exhaust gas entering the reaction chamber needs to be heated by the above-mentioned flame combustion.
[0031] Here, reference Figure 2As shown, if the temperature in the reaction chamber is maintained only by the flame combustion method as in the prior art, the position where the exhaust gas enters the reaction chamber is limited by the position of the exhaust gas inlet (i.e., the exhaust gas is directly injected into the reaction chamber from the top of the reaction chamber through the exhaust gas inlet) and the flame ejected by the combustion burner cannot directly spread at the flame inlet (i.e., due to the influence of the injection pressure of the fuel and the oxidant, the flame is ejected downward in the reaction chamber, forming a high temperature zone near the middle and downstream position of the reaction chamber outlet), which will cause the temperature at the top of the reaction chamber to be low, and it is easy to form a low temperature zone with a temperature lower than the reaction temperature required for the exhaust gas biochemical reaction (the specific position is as shown in FIG. 1 ). Figure 2 As shown, it basically coincides with the position where the exhaust gas enters the reaction chamber), which causes the exhaust gas to not react fully in the reaction chamber, thereby reducing the exhaust gas treatment efficiency of the exhaust gas treatment equipment.
[0032] Based on this, Figure 2 As shown, the present application improves the structure of the reaction chamber so that the improved reaction chamber consists of an internally connected electric heating chamber and a reaction chamber with a cooling layer, wherein the electric heating chamber is located above the reaction chamber with the cooling layer, that is, the electric heating chamber is placed on the side close to the top of the reaction chamber (that is, on the side where the above-mentioned low-temperature zone is easily generated). On the basis of the above-mentioned flame combustion, by adding an electric heating heating method (that is, a method of heating the interior of the reaction chamber by the electric heating chamber to provide the reaction temperature required for the chemical reaction of the exhaust gas flowing into the reaction chamber), the two heating methods of electric heating and flame combustion can be used in a stacked manner, ensuring that the exhaust gas can quickly contact the high-temperature heat source after entering the interior of the reaction chamber from the top of the reaction chamber, thereby reducing the volume of the exhaust gas distributed in the low-temperature area, which is beneficial to improving the exhaust gas treatment efficiency of the exhaust gas treatment equipment.
[0033] It should be noted that since the embodiment of the present application adds a heating method combining electric heating on the basis of the flame combustion method, there is no need to increase other fuel consumption. Therefore, while improving the exhaust gas treatment efficiency, it is also beneficial to save energy.
[0034] It should be noted that if Figure 2 As shown, the reaction chamber with a cooling layer may include a reaction chamber water inlet and a reaction chamber water outlet, and cooling water or other types of coolants may enter the cooling layer (i.e., Figure 2 The exhaust gas is discharged from the cooling layer through the reaction chamber outlet to the exhaust gas treatment equipment, thereby maintaining the temperature in the reaction chamber stable to meet the specific temperature requirements when the exhaust gas undergoes chemical reactions.
[0035] S103, exhaust gas after chemical reaction in the reaction chamber is discharged from the exhaust gas treatment equipment through the reaction chamber outlet of the reaction chamber.
[0036] Here, the exhaust gas will eliminate the harmful gases originally contained in it after a chemical reaction occurs inside the reaction chamber. That is, the exhaust gas after the chemical reaction occurs in the reaction chamber is a dischargeable gas that does not contain harmful gases (which is also equivalent to the exhaust gas treated by the exhaust gas treatment equipment). Therefore, the exhaust gas after the chemical reaction can be discharged from the exhaust gas treatment equipment through the outlet of the reaction chamber.
[0037] It should be noted that if Figure 2 As shown, the reaction chamber outlet is located in the area close to the bottom of the reaction chamber, where, affected by the drawing perspective, Figure 2 The specific outlet position and specific shape of the reaction chamber outlet are not shown, and the embodiments of the present application do not impose any limitation on the specific outlet position and specific shape of the reaction chamber outlet.
[0038] Below Figure 2 On the basis of the exhaust gas treatment equipment shown, the specific structure of the heating chamber and the specific electrical heating method that the heating chamber can perform on the inside of the reaction chamber are described in detail.
[0039] In the embodiment of the present application, as an optional embodiment, the electric heating rod may not be installed inside the electric heating chamber. In this case, the inner wall of the electric heating chamber may be used as a heating source to heat the interior of the reaction chamber through the inner wall of the electric heating chamber.
[0040] Specifically, refer to Figure 2 As shown in the reaction chamber, since the electric heating chamber and the reaction chamber with cooling layer are internally connected, the two together constitute Figure 2 The reaction chamber shown, therefore, the inner wall of the electric heating chamber is also equivalent to the inner wall of the reaction chamber. At this time, it is equivalent to that the entire inner wall of the reaction chamber can be used as a heating source. The heat generated by the heating source is radiated into the interior of the reaction chamber to heat the exhaust gas from the chemical reaction in the reaction chamber.
[0041] In the embodiment of the present application, as another optional embodiment, an electric heating rod can also be installed inside the electric heating chamber. In this case, the electric heating rod installed inside the electric heating chamber can be used as a heating source to heat the interior of the reaction chamber through the electric heating rod.
[0042] Here, in the prior art, when the exhaust gas in the reaction chamber is heated only by flame combustion, since there is no obstruction inside the reaction chamber, the exhaust gas flow can flow downward steadily, which easily leads to a relatively stable reaction interface between the outside of the flame and the exhaust gas, causing the exhaust gas far away from the flame to be unable to react, thereby reducing the technical defect of exhaust gas treatment efficiency.
[0043] Specifically, in order to overcome the above-mentioned technical defects, an electric heating rod can also be installed in the electric heating chamber. At this time, in addition to the above-mentioned heating function, the electric heating rod is also used to form an obstacle inside the reaction chamber to hinder the flow of exhaust gas; that is, inside the reaction chamber, the electric heating rod can also play a role in hindering the smooth flow of exhaust gas, which is beneficial to increase the degree of gas turbulence inside the reaction chamber, increase the residence time of exhaust gas in the reaction chamber, and at the same time improve the uniformity of temperature distribution in the reaction chamber.
[0044] It should be noted that the above-mentioned electric heating rod can be a ring-shaped heating rod (the diameter can be adjusted according to the diameter inside the reaction chamber), or it can be an electric heating rod in other shapes such as a semicircular, straight rod cylindrical, etc.; in addition, one electric heating rod can be installed in the electric heating chamber, or multiple electric heating rods can be installed. The embodiment of the present application does not impose any limitation on the specific formation and specific installation quantity of the above-mentioned electric heating rods.
[0045] For example, two annular electric heating rods are installed in the electric heating chamber. Figure 3 A schematic diagram of the structure of an electric heating chamber provided in an embodiment of the present application is shown. Figure 4 A schematic side view of an electric heating chamber provided in an embodiment of the present application is shown, wherein Figure 3 and Figure 4 As shown, electric heating chamber high temperature resistant material is added between the main body of the electric heating chamber and the outer shell of the electric heating chamber for isolation, two annular electric heating rods are installed inside the main body of the electric heating chamber (that is, inside the reaction chamber), and the two annular electric heating rods are connected to the electric heating rod power cord using electric heating rod plugs (the connection method can be a key connection), and outside the main body of the electric heating chamber (that is, outside the reaction chamber), the upper and lower electric heating rod plugs can be locked using electric heating rod plug clamps to ensure that the annular electric heating rods in the reaction chamber will not flip or move.
[0046] In an embodiment of the present application, the exhaust gas treatment equipment may further include a control system, which is located outside the reaction chamber and connected to the inside of the reaction chamber through pipes and sensors; wherein the above-mentioned sensors may include at least: a temperature sensor installed at the outlet of the reaction chamber and a flow sensor installed at the exhaust gas inlet, so that the above-mentioned control system can reasonably adjust the heating power corresponding to the electric heating and the flame size of the flame combustion according to the temperature at the outlet of the reaction chamber measured by the temperature sensor and the exhaust gas intake volume measured by the flow sensor, when the temperature measurement value is too low and the exhaust gas intake volume measurement value is too large, which may lead to insufficient heating of the exhaust gas in the current reaction chamber, so as to ensure that the exhaust gas in the reaction chamber can fully undergo chemical reaction and improve the exhaust gas treatment efficiency.
[0047] Here, as an optional embodiment, for the temperature measurement value measured by the temperature sensor at the outlet of the reaction chamber, the heating power corresponding to the electric heating and the flame size of the flame combustion can be adjusted according to the method shown in the following steps a1-a3, specifically:
[0048] Step a1: receiving the temperature measurement value sent by the temperature sensor through the control system, and determining whether the received temperature measurement value is less than a preset reaction temperature threshold.
[0049] Here, the temperature measurement value sent by the temperature sensor is the temperature value measured by the temperature sensor at the outlet of the reaction chamber. When the temperature measurement value is less than the preset reaction temperature threshold, it means that the current temperature in the reaction chamber may not meet the reaction temperature required for the exhaust gas to fully undergo a chemical reaction. At this time, the control system needs to increase the heating intensity of the exhaust gas in the reaction chamber to increase the temperature in the reaction chamber.
[0050] It should be noted that the specific value of the preset reaction temperature threshold can be set according to the actual exhaust gas treatment requirements, and the embodiments of the present application do not impose any limitation on this.
[0051] Step a2: when it is determined that the temperature measurement value is less than the preset reaction temperature threshold, the heating power corresponding to the electric heating is increased by the control system until the temperature measurement value is greater than or equal to the preset reaction temperature threshold.
[0052] Here, considering that the technical difficulty and adjustment speed of adjusting the heating power of the electric heating chamber (i.e. the heating power corresponding to the above-mentioned electric heating) will be better than adjusting the corresponding fuel addition amount and oxidant injection amount at the combustion nozzle (i.e. the fuel addition amount and oxidant injection amount corresponding to flame combustion), therefore, when it is detected that the temperature measurement value is indeed lower than the above-mentioned preset reaction temperature threshold, the control system will give priority to increasing the heating power corresponding to the electric heating heating method (i.e. the heating power of the electric heating chamber) to increase the temperature in the reaction chamber as soon as possible and improve the exhaust gas treatment efficiency.
[0053] Step a3: When the control system increases the heating power to the maximum power, if it is detected that the temperature measurement value is still less than the preset reaction temperature threshold, the fuel addition amount and the oxidant injection amount corresponding to the flame combustion are increased through the control system.
[0054] Here, the heating power corresponding to the electric heating method has an adjustment upper limit (that is, it cannot exceed the maximum power of the electric heating chamber). Therefore, when the above heating power is increased to the maximum power, if it is detected that the above temperature measurement value is still less than the above preset reaction temperature threshold, the corresponding fuel addition amount and oxidant injection amount at the combustion nozzle (that is, the fuel addition amount and oxidant injection amount corresponding to flame combustion) can be increased through the control system so that the temperature in the reaction chamber can meet the reaction temperature required for the exhaust gas to fully undergo a chemical reaction.
[0055] Here, as an optional embodiment, for the exhaust gas intake measurement value obtained by the above-mentioned flow sensor at the exhaust gas inlet, the heating power corresponding to the electric heating and the flame size of the flame combustion can be adjusted according to the method shown in the following steps b1-b3, specifically:
[0056] Step b1, receiving the exhaust gas intake volume measurement value sent by the flow sensor through the control system, and determining whether the received exhaust gas intake volume measurement value is greater than or equal to a preset intake volume threshold.
[0057] Here, the exhaust gas intake volume measurement value sent by the flow sensor is the exhaust gas intake volume measured by the flow sensor at the exhaust gas inlet. When the exhaust gas intake volume measurement value is greater than or equal to the preset intake volume threshold, it means that too much exhaust gas is currently entering the reaction chamber, which may easily lead to an increased probability of insufficient chemical reaction of the exhaust gas. Therefore, the control system needs to enhance the heating intensity of the exhaust gas in the reaction chamber to increase the temperature in the reaction chamber, speed up the exhaust gas treatment efficiency, and ensure that the exhaust gas in the reaction chamber can fully react chemically.
[0058] It should be noted that the specific value of the preset intake volume threshold can be set according to the actual exhaust gas treatment requirements, and the embodiments of the present application do not impose any limitation on this.
[0059] Step b2: When it is determined that the exhaust gas intake volume measurement value is greater than or equal to the preset intake volume threshold, the heating power corresponding to the electric heating is increased through the control system until the exhaust gas intake volume measurement value is less than the preset intake volume threshold.
[0060] Here, considering that the technical difficulty and adjustment speed of adjusting the heating power of the electric heating chamber (i.e. the heating power corresponding to the above-mentioned electric heating) will be better than adjusting the corresponding fuel addition amount and oxidant injection amount at the combustion nozzle (i.e. the fuel addition amount and oxidant injection amount corresponding to flame combustion), therefore, when it is detected that the measured value of the exhaust gas intake volume is greater than or equal to the preset intake volume threshold, the control system will give priority to increasing the heating power corresponding to the electric heating heating method (i.e. the heating power of the electric heating chamber) to increase the temperature in the reaction chamber as soon as possible and improve the exhaust gas treatment efficiency.
[0061] Step b3: Under the condition that the control system increases the heating power to the maximum power, if it is detected that the exhaust gas intake volume measurement value is still greater than or equal to the preset intake volume threshold, the fuel addition amount and oxidant injection amount corresponding to the flame combustion are increased through the control system.
[0062] Here, the heating power corresponding to the electric heating method has an adjustment upper limit (that is, it cannot exceed the maximum power of the electric heating chamber). Therefore, when the above-mentioned heating power is increased to the maximum power, if it is detected that the measured value of the exhaust gas intake volume is still greater than or equal to the preset intake volume threshold, the corresponding fuel addition amount and oxidant injection amount at the combustion nozzle (that is, the fuel addition amount and oxidant injection amount corresponding to flame combustion) can be increased through the control system so that the temperature in the reaction chamber can meet the reaction temperature required for the exhaust gas to fully undergo a chemical reaction.
[0063] Based on the above-mentioned waste gas treatment method provided in the embodiment of the present application, waste gas is received through a waste gas inlet, and the received waste gas is input into the interior of the reaction chamber; inside the reaction chamber, the reaction temperature required for chemical reaction is provided for the waste gas flowing into the reaction chamber by combining flame combustion with electric heating; the waste gas after chemical reaction in the reaction chamber is discharged from the waste gas treatment equipment through the reaction chamber outlet of the reaction chamber. Based on the above-mentioned waste gas treatment method, the present application combines flame combustion with electric heating inside the reaction chamber to ensure that the entire space in the reaction chamber is a high-temperature area, meeting the reaction temperature required for chemical reaction of the waste gas, which is beneficial to improving the waste gas treatment efficiency of the waste gas treatment equipment, and while improving the waste gas treatment efficiency, it is also beneficial to save energy.
[0064] Based on the same inventive concept, the present application also provides a waste gas treatment device corresponding to the above-mentioned waste gas treatment method. Since the principle of solving the problem by the waste gas treatment device in the embodiment of the present application is similar to the above-mentioned waste gas treatment method in the embodiment of the present application, the implementation of the waste gas treatment equipment can refer to the implementation of the above-mentioned waste gas treatment method, and the repeated parts will not be repeated.
[0065] Reference Figure 2 As shown, Figure 2 The schematic diagram of the structure of an electric heating and combustion combined exhaust gas treatment device provided in an embodiment of the present application is shown, wherein the exhaust gas treatment device comprises: an exhaust gas inlet, a cover plate, and a reaction chamber; wherein the exhaust gas inlet enters the interior of the closed reaction chamber through the cover plate;
[0066] The exhaust gas inlet is used to receive the exhaust gas and input the received exhaust gas into the interior of the reaction chamber;
[0067] The reaction chamber is used to provide the exhaust gas flowing into the reaction chamber with a reaction temperature required for a chemical reaction to occur by combining flame combustion with electric heating;
[0068] The waste gas after the chemical reaction in the reaction chamber is discharged from the waste gas treatment equipment through the reaction chamber outlet of the reaction chamber.
[0069] In an optional embodiment, the exhaust gas treatment equipment also includes: a flame inlet and a combustion nozzle, wherein the flame inlet enters the interior of the closed reaction chamber through the cover plate; the combustion burner is used to provide the exhaust gas flowing into the reaction chamber with the reaction temperature required for a chemical reaction by spraying flame into the reaction chamber through the flame inlet.
[0070] In an optional embodiment, the reaction chamber consists of an internally connected electric heating chamber and a reaction chamber with a cooling layer, wherein the electric heating chamber is located above the reaction chamber with a cooling layer; the electric heating chamber is used to provide the reaction temperature required for a chemical reaction for the exhaust gas flowing into the reaction chamber by heating the interior of the reaction chamber.
[0071] In an optional embodiment, the electric heating chamber is also used for:
[0072] An electric heating rod installed inside the electric heating chamber is used as a heating source to heat the interior of the reaction chamber through the electric heating rod;
[0073] or,
[0074] The inner wall of the electric heating chamber is used as a heating source to heat the interior of the reaction chamber through the inner wall of the electric heating chamber.
[0075] In an optional embodiment, when the electric heating rod is installed inside the electric heating chamber, the electric heating rod is also used to form a barrier inside the reaction chamber to hinder the flow of exhaust gas.
[0076] In an optional embodiment, the exhaust gas treatment device further includes a control system and a temperature sensor installed at the outlet of the reaction chamber, wherein the control system is used to:
[0077] Receiving a temperature measurement value sent by the temperature sensor, and determining whether the received temperature measurement value is less than a preset reaction temperature threshold;
[0078] When it is determined that the temperature measurement value is less than the preset reaction temperature threshold, the heating power corresponding to the electric heating is increased until the temperature measurement value is greater than or equal to the preset reaction temperature threshold.
[0079] In an optional implementation, the control system is further used for:
[0080] Under the condition that the heating power is increased to the maximum power, if it is detected that the temperature measurement value is still less than the preset reaction temperature threshold, the fuel addition amount and the oxidant injection amount corresponding to the flame combustion are increased.
[0081] In an optional embodiment, the exhaust gas treatment device further includes a control system and a flow sensor installed at the exhaust gas inlet, wherein the control system is used to:
[0082] receiving the exhaust gas intake volume measurement value sent by the flow sensor, and determining whether the received exhaust gas intake volume measurement value is greater than or equal to a preset intake volume threshold;
[0083] When it is determined that the exhaust gas intake amount measurement value is greater than or equal to the preset intake amount threshold, the heating power corresponding to the electric heating is increased until the exhaust gas intake amount measurement value is less than the preset intake amount threshold.
[0084] In an optional implementation, the control system is further used for:
[0085] Under the condition that the heating power is increased to the maximum power, if it is detected that the exhaust gas intake volume measurement value is still greater than or equal to the preset intake volume threshold, the fuel addition amount and the oxidant injection amount corresponding to the flame combustion are increased through the control system.
[0086] In the embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. The system embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of systems or units, which can be electrical, mechanical or other forms.
[0087] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and are not to be understood as indicating or implying relative importance.
[0088] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. They should all be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.
Claims
1. A waste gas treatment method combining electric heating and combustion, characterized in that: Applied to a waste gas treatment device, the waste gas treatment device comprises: a waste gas inlet, a cover plate and a reaction chamber; wherein the waste gas inlet enters the closed interior of the reaction chamber through the cover plate; the waste gas treatment method comprises: receiving the exhaust gas through the exhaust gas inlet and inputting the received exhaust gas into the interior of the reaction chamber; Inside the reaction chamber, a reaction temperature required for a chemical reaction to occur is provided for the waste gas flowing into the reaction chamber by combining flame combustion with electric heating; The waste gas after the chemical reaction in the reaction chamber is discharged from the waste gas treatment equipment through the reaction chamber outlet of the reaction chamber.
2. The waste gas treatment method according to claim 1, characterized in that: The exhaust gas treatment equipment further includes: a flame inlet and a combustion nozzle, wherein the flame inlet enters the interior of the closed reaction chamber through the cover plate; the combination of flame combustion and electric heating provides the exhaust gas flowing into the reaction chamber with a reaction temperature required for a chemical reaction, including: The combustion burner sprays flames into the reaction chamber through the flame inlet, thereby providing the exhaust gas flowing into the reaction chamber with the reaction temperature required for chemical reaction to occur.
3. The waste gas treatment method according to claim 1, characterized in that: The reaction chamber is composed of an internally connected electric heating chamber and a reaction chamber with a cooling layer, wherein the electric heating chamber is located above the reaction chamber with a cooling layer; the method of combining flame combustion with electric heating to provide the exhaust gas flowing into the reaction chamber with the reaction temperature required for chemical reaction, further comprising: The electric heating chamber heats the interior of the reaction chamber, thereby providing the exhaust gas flowing into the reaction chamber with the reaction temperature required for a chemical reaction to occur.
4. The waste gas treatment method according to claim 1, characterized in that: The method of heating the interior of the reaction chamber by the electric heating chamber includes: An electric heating rod installed inside the electric heating chamber is used as a heating source to heat the interior of the reaction chamber through the electric heating rod; or, The inner wall of the electric heating chamber is used as a heating source to heat the interior of the reaction chamber through the inner wall of the electric heating chamber.
5. The waste gas treatment method according to claim 4, characterized in that: When the electric heating rod is installed inside the electric heating chamber, the electric heating rod is also used to form a barrier inside the reaction chamber to hinder the flow of exhaust gas.
6. The waste gas treatment method according to claim 1, characterized in that: The waste gas treatment equipment further includes a control system and a temperature sensor installed at the outlet of the reaction chamber, and the waste gas treatment method further includes: Receiving, by the control system, a temperature measurement value sent by the temperature sensor, and determining whether the received temperature measurement value is less than a preset reaction temperature threshold; When it is determined that the temperature measurement value is less than the preset reaction temperature threshold, the heating power corresponding to the electric heating is increased by the control system until the temperature measurement value is greater than or equal to the preset reaction temperature threshold.
7. The waste gas treatment method according to claim 6, characterized in that: The waste gas treatment method further comprises: Under the condition that the control system increases the heating power to the maximum power, if it is detected that the temperature measurement value is still less than the preset reaction temperature threshold, the fuel addition amount and the oxidant injection amount corresponding to the flame combustion are increased through the control system.
8. The waste gas treatment method according to claim 1, characterized in that: The exhaust gas treatment device further includes a control system and a flow sensor installed at the exhaust gas inlet, and the exhaust gas treatment method further includes: receiving, by the control system, a measured value of the exhaust gas intake volume sent by the flow sensor, and determining whether the received measured value of the exhaust gas intake volume is greater than or equal to a preset intake volume threshold; When it is determined that the exhaust gas intake amount measurement value is greater than or equal to the preset intake amount threshold, the heating power corresponding to the electric heating is increased by the control system until the exhaust gas intake amount measurement value is less than the preset intake amount threshold.
9. The waste gas treatment method according to claim 8, characterized in that: The waste gas treatment method further comprises: Under the condition that the control system increases the heating power to the maximum power, if it is detected that the exhaust gas intake volume measurement value is still greater than or equal to the preset intake volume threshold, the control system increases the fuel addition amount and oxidant injection amount corresponding to the flame combustion.
10. An exhaust gas treatment device combining electric heating and combustion, characterized in that: The exhaust gas treatment equipment comprises: an exhaust gas inlet, a cover plate and a reaction chamber; wherein the exhaust gas inlet enters the closed interior of the reaction chamber through the cover plate; The exhaust gas inlet is used to receive the exhaust gas and input the received exhaust gas into the interior of the reaction chamber; The reaction chamber is used to provide the exhaust gas flowing into the reaction chamber with a reaction temperature required for a chemical reaction to occur by combining flame combustion with electric heating; The waste gas after the chemical reaction in the reaction chamber is discharged from the waste gas treatment equipment through the reaction chamber outlet of the reaction chamber.