Heating electric furnace flue gas transfer mechanism
By using a dual-path system and linkage mechanism of main exhaust pipe and backup exhaust pipe, the problems of high-temperature flue gas cooling and equipment blockage during the electric furnace flue gas transfer process are solved, realizing continuous flue gas treatment and efficient energy utilization, and reducing the risk of thermal pollution and equipment damage.
Patent Information
- Application Number
- CN202522159180.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-13
AI Technical Summary
In the existing technology for treating flue gas from electric furnaces, it is difficult to transfer and exhaust high-temperature flue gas and it is inconvenient to cool it down, which leads to equipment blockage and energy waste, affecting the effectiveness of environmental protection.
A flue gas transfer mechanism was designed, which includes a main exhaust pipe, a backup exhaust pipe, an exhaust switching valve, and a linkage mechanism. The flue gas temperature is cooled in stages through a dual-path exhaust system and an integrated heat exchange sleeve, and a waste heat recovery system is used to generate high-temperature hot water. The linkage mechanism ensures that the heat exchange components switch synchronously.
It achieves continuous flue gas treatment and improves environmental governance efficiency, reduces thermal pollution and energy waste, ensures synchronous switching of heat exchange components during the transfer process, and reduces the risk of equipment damage.
Smart Images
Figure CN224681292U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric furnace flue gas treatment technology, and in particular to a flue gas transfer and exhaust mechanism for heating electric furnaces. Background Technology
[0002] An electric furnace is a heating furnace that converts electrical energy into heat to heat workpieces. The fumes produced during this process may contain carbon monoxide, sulfur dioxide, nitrogen oxides, hydrides, heavy metals, dioxins, and other harmful particulate matter. Direct discharge of these fumes pollutes the atmosphere and also affects the health of employees. With increasing emphasis on environmental protection and the implementation of pollutant treatment requirements in most enterprises, these fumes must be treated before being released.
[0003] During the treatment and emission of electric furnace flue gas, the flue gas emission pipeline system may become blocked or damaged. In addition, various devices in the flue gas emission system also require regular maintenance. Therefore, there may be situations where the original emission pipeline cannot be used. If it is not necessary to interrupt the electric furnace heating operation, it is necessary to switch to the backup emission pipeline and transfer the electric furnace flue gas for emission.
[0004] In addition, electric furnace flue gas is often high-temperature gas, and high temperature can also change the local atmospheric temperature field and affect the surrounding ecological balance. Therefore, electric furnace flue gas needs to be cooled down. Cooling down usually involves cooling down the emission pipes. Therefore, when switching emission pipes to transfer electric furnace flue gas, it will also affect the normal high-temperature flue gas cooling process. Utility Model Content
[0005] In view of this, the purpose of this utility model is to propose a flue gas transfer and exhaust mechanism for electric furnaces, so as to solve the technical problem of troublesome treatment of electric furnace flue gas in the prior art, especially the difficulty in cooling down high-temperature flue gas during the transfer and exhaust process of electric furnace flue gas.
[0006] A flue gas transfer and exhaust mechanism for a heating electric furnace includes a primary exhaust pipe directly connected to the flue gas discharge port of the heating electric furnace. The flue gas transfer and exhaust mechanism further includes: The main exhaust pipe and the backup exhaust pipe are connected to the outlet end of the primary exhaust pipe through an exhaust switching valve; The heat exchange sleeves are provided in two and are respectively fitted onto the main exhaust pipe and the backup exhaust pipe. The main water pipe and the backup water pipe are respectively connected to the two heat exchange sleeves. The main water pipe and the backup water pipe are connected to the main water inlet pipe through a water circuit switching valve. In addition, each of the two heat exchange sleeves is also connected to a return water pipe. The main water inlet pipe and the return water pipe are connected to an external waste heat recovery device.
[0007] Furthermore, the heat exchange sleeve is made of stainless steel with an inner layer of polyurethane for insulation, and the return water pipe is made of PPR hot water insulation pipe.
[0008] Furthermore, both the main exhaust pipe and the backup exhaust pipe are equipped with heat exchange pipes, which are located inside the heat exchange sleeve and have open ends that communicate with the inner cavity of the heat exchange sleeve.
[0009] Furthermore, the heat exchange tube is made of copper or aluminum-plastic composite, and the heat exchange tube is not connected to the main exhaust pipe or the backup exhaust pipe. There are several heat exchange tubes arranged in an alternating manner.
[0010] Furthermore, a linkage mechanism is provided between the air circuit valve core in the exhaust switching valve and the water circuit valve core in the water circuit switching valve to allow the air circuit valve core and the water circuit valve core to rotate and switch synchronously.
[0011] Furthermore, the linkage mechanism includes a main linkage shaft fixedly connected to the outer end of the air circuit valve core and a driven shaft fixedly connected to the outer end of the water circuit valve core, and a linkage belt is connected between the main linkage shaft and the driven shaft.
[0012] Furthermore, a switching knob is fixedly connected to the outer end of the main linkage shaft. The switching knob is located outside the exhaust switching valve and is rotatably connected to the exhaust switching valve housing.
[0013] Furthermore, the main water pipe and the backup water pipe are connected to the lower end of their respective heat exchange sleeves, and the return water pipe is connected to the top of their respective heat exchange sleeves.
[0014] The beneficial effects of this utility model are as follows: 1. By using a dual exhaust system with a main exhaust pipe and a backup exhaust pipe, and by setting an exhaust switching valve for switching use, the system can be switched to exhaust electric furnace flue gas during maintenance and other situations, so that the flue gas treatment continuity reaches 90%, and the environmental protection efficiency is improved.
[0015] 2. An integrated heat exchange sleeve is installed to reduce the flue gas temperature from 600℃ to below 150℃ in a stepped manner, effectively reducing thermal pollution. At the same time, the waste heat recovery system recovers heat to generate high-temperature hot water, reducing energy consumption and waste.
[0016] 3. Heat exchange tubes are installed in the heat exchange sleeve to improve heat exchange efficiency. In addition, the heat exchange sleeve is made of stainless steel with an inner layer of polyurethane for insulation, and the return water pipe is made of PPR hot water insulation pipe to effectively reduce heat loss.
[0017] 4. A linkage mechanism is provided between the gas valve core in the exhaust switching valve and the water valve core in the water switching valve. Therefore, when switching between the main exhaust pipe and the backup exhaust pipe, two sets of heat exchange components will also be used to avoid forgetting to switch the heat exchange components when switching the electric furnace flue gas, which would lead to thermal pollution and energy loss. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure and principle of the device of this utility model.
[0020] Figure 2 This is a schematic diagram of the internal structure of the device of this utility model.
[0021] Figure 3 This is a schematic diagram of the internal structure of the heat exchange sleeve in the device of this utility model.
[0022] Figure 4 This is a schematic diagram of the internal mechanisms of the exhaust switching valve and the water circuit switching valve in the device of this utility model.
[0023] The diagram is marked as follows: 101. Primary exhaust pipe; 102. Exhaust switching valve; 103. Main exhaust pipe; 104. Backup exhaust pipe; 105. Main water inlet pipe; 106. Water circuit switching valve; 107. Heat exchange sleeve; 108. Main water pipe; 109. Backup water pipe; 110. Return water pipe; 111. Heat exchange tube; 112. Switching knob; 113. Gas circuit valve core; 114. Water circuit valve core; 115. Main linkage shaft; 116. Driven shaft; 117. Linkage belt. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0026] The first aspect of this utility model is as follows: Figure 1 , Figure 2 and Figure 3 As shown, during the treatment and emission of electric furnace flue gas, the flue gas emission pipeline system may become blocked or damaged. Furthermore, various devices in the flue gas emission system require regular maintenance. Therefore, situations may arise where the original emission pipeline becomes unusable. If the electric furnace heating operation is not interrupted, it is necessary to switch to a backup emission pipeline to divert the electric furnace flue gas. Electric furnace flue gas is often high-temperature gas, and high temperatures can alter the local atmospheric temperature field, affecting the surrounding ecological balance. Therefore, this utility model designs a main exhaust pipe 103 and a backup exhaust pipe 104.
[0027] The main exhaust pipe 103 and the backup exhaust pipe 104 are connected to the outlet end of the primary exhaust pipe 101 through the exhaust switching valve 102, while the primary exhaust pipe 101 is directly connected to the flue gas discharge port of the heating electric furnace.
[0028] The system employs a dual-path exhaust system consisting of a main exhaust pipe 103 and a backup exhaust pipe 104, with an additional exhaust switching valve 102 for switching between them. This allows for switching between exhaust systems to handle electric furnace flue gas during maintenance and repairs, ensuring 100% continuity of flue gas treatment and improving environmental governance efficiency.
[0029] To address thermal pollution, a heat exchange assembly is installed on both the main exhaust pipe 103 and the backup exhaust pipe 104. The heat exchange assembly mainly includes two heat exchange sleeves 107, which are respectively fitted onto the main exhaust pipe 103 and the backup exhaust pipe 104. The two heat exchange sleeves 107 are respectively connected to a main water pipe 108 and a backup water pipe 109. The main water pipe 108 and the backup water pipe 109 are connected to the main water inlet pipe 105 through a water circuit switching valve 106. In addition, a return water pipe 110 is also connected to each of the two heat exchange sleeves 107. The main water inlet pipe 105 and the return water pipe 110 are connected to an external waste heat recovery device.
[0030] The integrated heat exchange sleeve 107 reduces the flue gas temperature from 600℃ to below 150℃ in a stepped manner, effectively reducing thermal pollution. At the same time, the waste heat recovery system recovers heat to generate high-temperature hot water, reducing energy consumption and waste.
[0031] Preferably, the heat exchange sleeve 107 is made of stainless steel and has an inner layer of polyurethane for insulation, and the return water pipe 110 is made of PPR hot water insulation pipe.
[0032] In addition, both the main exhaust pipe 103 and the backup exhaust pipe 104 are equipped with heat exchange tubes 111. The heat exchange tubes 111 are located inside the heat exchange sleeve 107, and both ends of the heat exchange tubes 111 are open and communicate with the inner cavity of the heat exchange sleeve 107. The heat exchange tubes 111 are made of copper tubes or aluminum-plastic composite tubes, and the heat exchange tubes 111 are not connected to the main exhaust pipe 103 or the backup exhaust pipe 104. Several heat exchange tubes 111 are provided and are arranged in an alternating manner.
[0033] Heat exchange tubes 111 are installed in heat exchange sleeve 107 to improve heat exchange efficiency. In addition, the heat exchange sleeve 107 is made of stainless steel and has a layer of polyurethane for insulation inside. The return water pipe 110 is made of PPR hot water insulation pipe to effectively reduce heat loss.
[0034] The second aspect of this utility model is as follows: Figure 1 , Figure 2 and Figure 4 As shown, cooling treatment for electric furnace flue gas is generally performed on the exhaust pipes. Therefore, switching exhaust pipes for electric furnace flue gas transfer can affect normal high-temperature flue gas cooling. This embodiment incorporates a linkage mechanism in the exhaust switching valve 102 and the water switching valve 106, allowing them to switch synchronously. Therefore, when switching between the main exhaust pipe 103 and the backup exhaust pipe 104, both sets of heat exchange components are used simultaneously, preventing forgetting to switch heat exchange components during electric furnace flue gas transfer, which could lead to thermal pollution and energy loss.
[0035] Specifically, a linkage mechanism is provided between the air circuit valve core 113 in the exhaust switching valve 102 and the water circuit valve core 114 in the water circuit switching valve 106, which is used to allow the air circuit valve core 113 and the water circuit valve core 114 to rotate and switch synchronously.
[0036] The linkage mechanism includes a main linkage shaft 115 fixedly connected to the outer end of the air circuit valve core 113 and a driven shaft 116 fixedly connected to the outer end of the water circuit valve core 114. A linkage belt 117 connects the main linkage shaft 115 and the driven shaft 116. A switching knob 112 is also fixedly connected to the outer end of the main linkage shaft 115. The switching knob 112 is located outside the exhaust switching valve 102 and is rotatably connected to the housing of the exhaust switching valve 102.
[0037] The switching knob 112 can also be replaced with an automatically controlled motor, which drives the air valve core 113 and the water valve core 114 to rotate, making it faster and easier.
[0038] Preferably, the main water pipe 108 and the backup water pipe 109 are connected to the lower end of their respective heat exchange sleeves 107, and the return water pipe 110 is connected to the top of their respective heat exchange sleeves 107.
[0039] In summary, this utility model utilizes a dual-path exhaust system with a main exhaust pipe 103 and a backup exhaust pipe 104, and additionally provides an exhaust switching valve 102 for switching between uses. In situations such as maintenance and repair, the system can be switched to exhaust electric furnace flue gas, ensuring 100% continuity of flue gas treatment and improving environmental governance efficiency.
[0040] The integrated heat exchange sleeve 107 reduces the flue gas temperature from 600℃ to below 150℃ in a stepped manner, effectively reducing thermal pollution. Simultaneously, a waste heat recovery system recovers heat to generate high-temperature hot water, reducing energy consumption and waste. Heat exchange tubes 111 are installed in the heat exchange sleeve 107 to improve heat exchange efficiency. Furthermore, the heat exchange sleeve 107 uses a stainless steel outer shell with an internal layer of polyurethane insulation, and the return water pipe 110 uses PPR hot water insulation pipe, effectively reducing heat loss.
[0041] A linkage mechanism is provided between the gas valve core 113 in the exhaust switching valve 102 and the water valve core 114 in the water switching valve 106. Therefore, when switching between the main exhaust pipe 103 and the spare exhaust pipe 104, two sets of heat exchange components will also be used to avoid forgetting to switch the heat exchange components when switching the electric furnace flue gas, which would lead to thermal pollution and energy loss.
[0042] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.
[0043] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A flue gas transfer and exhaust mechanism for a heating electric furnace, comprising a primary exhaust pipe (101) directly connected to the flue gas exhaust port of the heating electric furnace, characterized in that, The flue gas transfer and exhaust mechanism also includes: The main exhaust pipe (103) and the backup exhaust pipe (104) are connected to the outlet end of the first-stage exhaust pipe (101) through an exhaust switching valve (102); Two heat exchange sleeves (107) are provided and respectively fitted on the main exhaust pipe (103) and the standby exhaust pipe (104). The two heat exchange sleeves (107) are respectively connected to the main water pipe (108) and the standby water pipe (109). The main water pipe (108) and the standby water pipe (109) are connected to the main water inlet pipe (105) through the water circuit switching valve (106). In addition, a return water pipe (110) is connected to each of the two heat exchange sleeves (107). The main water inlet pipe (105) and the return water pipe (110) are connected to the external waste heat recovery equipment.
2. The flue gas transfer and exhaust mechanism for a heating electric furnace according to claim 1, characterized in that, The heat exchange sleeve (107) is made of stainless steel and has a layer of polyurethane for insulation inside. The return water pipe (110) is made of PPR hot water insulation pipe.
3. A flue gas transfer and exhaust mechanism for a heating electric furnace according to claim 1 or 2, characterized in that, Both the main exhaust pipe (103) and the spare exhaust pipe (104) are equipped with heat exchange pipes (111). The heat exchange pipes (111) are located inside the heat exchange sleeve (107), and both ends of the heat exchange pipes (111) are open and communicate with the inner cavity of the heat exchange sleeve (107).
4. The flue gas transfer and exhaust mechanism for a heating electric furnace according to claim 3, characterized in that, The heat exchange tube (111) is made of copper or aluminum-plastic composite tube, and the heat exchange tube (111) is not connected to the main exhaust pipe (103) or the backup exhaust pipe (104). There are several heat exchange tubes (111) arranged in an alternating manner.
5. The flue gas transfer and exhaust mechanism for a heating electric furnace according to claim 1, characterized in that, A linkage mechanism is provided between the air circuit valve core (113) in the exhaust switching valve (102) and the water circuit valve core (114) in the water circuit switching valve (106) to allow the air circuit valve core (113) and the water circuit valve core (114) to rotate and switch synchronously.
6. The flue gas transfer and exhaust mechanism for a heating electric furnace according to claim 5, characterized in that, The linkage mechanism includes a main linkage shaft (115) fixedly connected to the outer end of the air valve core (113) and a driven shaft (116) fixedly connected to the outer end of the water valve core (114). A linkage belt (117) is connected between the main linkage shaft (115) and the driven shaft (116).
7. The flue gas transfer and exhaust mechanism for a heating electric furnace according to claim 6, characterized in that, The outer end of the main linkage shaft (115) is also fixedly connected to a switching knob (112), which is located outside the exhaust switching valve (102) and rotatably connected to the outer shell of the exhaust switching valve (102).
8. The flue gas transfer and exhaust mechanism for a heating electric furnace according to claim 1, characterized in that, The main water pipe (108) and the backup water pipe (109) are connected to the lower end of their respective heat exchange sleeves (107), and the return water pipe (110) is connected to the top of their respective heat exchange sleeves (107).