Calcining furnace with furnace gas waste heat recovery function

Abstract

The utility model relates to the technical field of calcining furnaces, in particular to a calcining furnace with a furnace gas waste heat recovery function, which comprises a calcining furnace main body, and the top end of the calcining furnace main body is communicated with a gas guide pipe; the recycling mechanism capable of quickly recycling the waste heat of the furnace gas is arranged on one side of the gas guide pipe; by arranging the recycling mechanism, the first heat exchange pipe is spirally arranged on the inner wall of the heat exchange cylinder, the second heat exchange pipe is spirally arranged on the outer wall of the first heat exchange pipe, the first heat exchange pipe and the second heat exchange pipe are matched, the contact area between the heat exchange pipes and furnace gas can be increased, and the waste heat recycling efficiency of the heat exchange pipes is improved; the heat gathering plate between the two heat exchange pipes can gather heat in the furnace gas, the recovery effect of the device can be improved through cooperation with the two heat exchange pipes, the heat insulation plate on the outer wall of the heat exchange barrel can conduct heat insulation and heat preservation on the heat exchange barrel, the baffle can slow down the conveying speed of the furnace gas, the waste heat of the furnace gas can be efficiently recovered, and the recovery efficiency of the device is improved. The recovery efficiency of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of calcining furnaces, in particular to a calcining furnace with a furnace gas waste heat recovery function. Background Art

[0002] Calciner is a thermal equipment that heat treats carbon raw materials (such as coke, anthracite, etc.) at high temperature to improve the performance of raw materials. It is used for ironmaking, recycling rare metals, catalyst production, environmental improvement, and production of special chemicals. Calciner will generate a lot of flue gas when in use. In order to avoid energy waste, it is necessary to use the waste heat recovery function of furnace gas to recycle the heat in the flue gas.

[0003] After searching the Chinese patent "A calcining furnace with a power generation device", the announcement number is "CN215598124U". This patent has a flue gas inlet pipe in the air intake chamber, the flue gas inlet pipe is connected to the calcining furnace, a heat exchange outer pipe is arranged in the air intake chamber, the top of the heat exchange outer pipe is connected to the air intake chamber, the bottom extends into the air outlet chamber and is connected to the air outlet chamber, a heat exchange inner pipe is arranged in the heat exchange outer pipe, the top of the heat exchange inner pipe is connected to the water inlet chamber, the bottom is connected to the circulation chamber, the air outlet chamber is provided with a flue gas outlet pipe, and the circulation chamber is connected to a circulation pipe. The utility model has a simple structure, reliable operation, greatly increases the heat exchange area, thereby improving the heat exchange efficiency and heat exchange speed, but the device cannot effectively recover part of the heat when recovering the flue gas, which will cause energy waste, and it is not convenient to efficiently recycle the heat in the flue gas, which reduces the use effect of the device.

[0004] Therefore, a calcining furnace with a furnace gas waste heat recovery function is proposed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a calcining furnace with a furnace gas waste heat recovery function in order to solve the above-mentioned problem, thereby improving the problem of inconvenience in efficiently recovering and utilizing the heat in the flue gas.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a calcining furnace with the function of recovering waste heat from furnace gas, comprising a calcining furnace main body, the top of which is connected to an air duct; a recovery mechanism, which can quickly recover and utilize the waste heat from furnace gas, and is arranged on one side of the air duct; wherein the recovery mechanism comprises a heat exchange tube connected to one end of the air duct, a waste heat recoverer is arranged at one end of the heat exchange tube, and a cleaning component is arranged on the inner wall of the heat exchange tube.

[0007] Preferably, the recovery mechanism also includes a first heat exchange tube arranged on the inner wall of the heat exchange tube, a second heat exchange tube is arranged on the inner wall of the heat exchange tube, the second heat exchange tube is arranged on the outer wall of the first heat exchange tube, the first heat exchange tube is connected to the second heat exchange tube, and a heat collecting plate is arranged between the first heat exchange tube and the second heat exchange tube, so as to efficiently recover the waste heat of the furnace gas and reduce the heat consumption of the furnace gas.

[0008] Preferably, one end of the second heat exchange tube passes through the heat exchange cylinder and is connected to a heat-insulating water tank, so that the waste heat of the furnace gas can be quickly recovered and stored.

[0009] Preferably, the outer wall of the heat exchange cylinder is provided with a heat insulation plate, which can insulate the temperature inside the heat exchange cylinder and reduce the volatilization of heat.

[0010] Preferably, a connecting pipe is connected between the heat exchange cylinder and the waste heat recovery device, and one end of the inner wall of the connecting pipe is fixedly connected to several evenly distributed baffles, which can reduce the conveying speed of the furnace gas, extend the time of the furnace gas in the heat exchange cylinder, and further recover the waste heat of the furnace gas.

[0011] Preferably, the cleaning assembly includes a mounting ring slidably connected to the inner wall of the heat exchange tube, the inner wall of the mounting ring is fixedly connected to a cleaning brush, and the outer wall of the mounting ring is fixedly connected to a plurality of evenly distributed sliders, and the mounting ring drives the cleaning brush to clean impurities on the first heat exchange tube and the inner wall of the heat exchange tube, thereby improving the device's conversion efficiency of waste heat.

[0012] Preferably, one end of the mounting ring is fixedly connected to a plurality of evenly distributed support rods, and one end of the support rod passes through the heat exchange cylinder and is fixedly connected to a fixing ring. The position of the cleaning brush can be adjusted.

[0013] Preferably, a placement box is fixedly connected to the bottom of one end of the heat exchange cylinder, and a collection box is slidably connected to the inner wall of the placement box, so that impurities cleaned by the cleaning brush can be collected.

[0014] The beneficial effects of the utility model are:

[0015] 1. By setting up a recovery mechanism, when recovering the waste heat of the furnace gas, the first heat exchange tube is spirally arranged on the inner wall of the heat exchange tube, and the second heat exchange tube is spirally arranged on the outer wall of the first heat exchange tube. The first heat exchange tube cooperates with the second heat exchange tube to increase the contact area between the heat exchange tube and the furnace gas, and improve the waste heat recovery efficiency of the heat exchange tube. The heat collecting plate between the two heat exchange tubes can gather the heat in the furnace gas, and cooperate with the two heat exchange tubes to improve the recovery effect of the device. The heat insulation plate on the outer wall of the heat exchange tube can insulate the heat exchange tube and reduce the dissipation of heat. The insulation water tank can store and use the recovered heat of the heat exchange tube. The baffle in the connecting pipe can slow down the conveying speed of the furnace gas, so that the waste heat of the furnace gas can be efficiently recovered, and the recovery efficiency of the device is improved.

[0016] 2. By setting up a cleaning component, when recovering the waste heat from the furnace gas, the mounting ring at one end of the inner wall of the heat exchange tube drives the cleaning brush to move to one end to clean the accumulated impurities on the heat exchange tube, the inner wall of the heat collecting plate and the surface of the first heat exchange tube, thereby improving the efficiency of the device in recovering waste heat. The mounting ring slides in the heat exchange tube through the slider, and the support rod cooperates with the fixed ring to drive the cleaning brush to clean the impurities. The collection box in the placement box can collect the impurities in the heat exchange tube in a centralized manner, and can clean the impurities on the pipeline and the heat exchange tube, thereby improving the waste heat conversion efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the recovery mechanism structure of the utility model;

[0019] Figure 3 It is a partial structural schematic diagram of the recycling mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the cleaning component of the utility model.

[0021] In the figure: 1. calcining furnace body; 2. air guide pipe; 3. recovery mechanism; 301. heat exchange tube; 302. waste heat recovery device; 303. first heat exchange tube; 304. second heat exchange tube; 305. insulation water tank; 306. insulation board; 307. connecting pipe; 308. baffle; 309. cleaning assembly; 3091. mounting ring; 3092. cleaning brush; 3093. slider; 3094. support rod; 3095. fixing ring; 3096. placement box; 3097. collection box; 310. heat collecting plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] When implementing: Figure 1-4 As shown, a calcining furnace with the function of recovering waste heat from furnace gas comprises a calcining furnace main body 1, the top of which is connected to an air duct 2; a recovery mechanism 3, which can quickly recover the waste heat from furnace gas and is arranged on one side of the air duct 2; wherein the recovery mechanism 3 comprises a heat exchange tube 301 connected to one end of the air duct 2, a waste heat recoverer 302 is arranged at one end of the heat exchange tube 301, and a cleaning component 309 is arranged on the inner wall of the heat exchange tube 301.

[0024] like Figure 2 and Figure 3 As shown, the recovery mechanism 3 also includes a first heat exchange tube 303 arranged on the inner wall of the heat exchange tube 301, a second heat exchange tube 304 is arranged on the inner wall of the heat exchange tube 301, the second heat exchange tube 304 is arranged on the outer wall of the first heat exchange tube 303, the first heat exchange tube 303 is connected to the second heat exchange tube 304, a heat collecting plate 310 is arranged between the first heat exchange tube 303 and the second heat exchange tube 304, one end of the second heat exchange tube 304 passes through the heat exchange tube 301 and is connected to the insulation water tank 305, the outer wall of the heat exchange tube 301 is provided with a heat insulation plate 306, and the heat exchange tube 301 and the waste heat recovery device 302 are connected to each other. A connecting pipe 307 is provided, and one end of the inner wall of the connecting pipe 307 is fixedly connected with a plurality of evenly distributed baffles 308. One end of the second heat exchange pipe 304 is connected to an external water source to transport water to the second heat exchange pipe 304 and the first heat exchange pipe 303 to recover the waste heat of the furnace gas in the heat exchange cylinder 301. The heat collecting plate 310 collects the heat of the furnace gas to improve the waste heat recovery efficiency of the first heat exchange pipe 303 and the second heat exchange pipe 304. The insulated water tank 305 cooperates with the first heat exchange pipe 303 to store and use the waste heat of the furnace gas, and can efficiently recover the waste heat of the furnace gas, thereby improving the recovery efficiency of the device.

[0025] like Figure 4As shown, the cleaning assembly 309 includes a mounting ring 3091 slidably connected to the inner wall of the heat exchange tube 301, a cleaning brush 3092 is fixedly connected to the inner wall of the mounting ring 3091, a plurality of evenly distributed sliders 3093 are fixedly connected to the outer wall of the mounting ring 3091, a plurality of evenly distributed support rods 3094 are fixedly connected to one end of the mounting ring 3091, one end of the support rod 3094 passes through the heat exchange tube 301 and is fixedly connected to a fixing ring 3095, and a plurality of evenly distributed support rods 3094 are fixedly connected to one end of the heat exchange tube 301. A placement box 3096 is fixedly connected to the bottom, and a collection box 3097 is slidably connected to the inner wall of the placement box 3096. The fixing ring 3095 is pulled to cooperate with the support rod 3094 to drive the installation ring 3091 to move to one end. The installation ring 3091 drives the cleaning brush 3092 to clean the impurities on the heat collecting plate 310, the inner wall of the heat exchange tube 301 and the surface of the first heat exchange tube 303. The impurities on the pipeline and the heat exchange tube can be cleaned to improve the waste heat conversion efficiency of the device.

[0026] When the utility model is in use, the furnace gas in the calcining furnace body 1 is transported to the heat exchange tube 301 through the air guide pipe 2, and one end of the second heat exchange tube 304 is connected to the external water source to transport the water flow to the second heat exchange tube 304 and the first heat exchange tube 303 to recover the waste heat of the furnace gas. The heat collecting plate 310 collects the heat of the furnace gas and cooperates with the first heat exchange tube 303 and the second heat exchange tube 304 to recover the waste heat. The heat insulation plate 306 insulates the heat in the heat exchange tube 301. The heat preservation water tank 305 cooperates with the first heat exchange tube 303 to recover the waste heat of the furnace gas. The waste heat is stored and used, the heat exchange tube 301 transports the furnace gas to the waste heat recovery device 302 through the connecting pipe 307, and the waste heat recovery device 302 is started by the controller to recover the waste heat of the furnace gas. The fixing ring 3095 is manually pulled to cooperate with the support rod 3094 to drive the mounting ring 3091 to move to one end, and the mounting ring 3091 cooperates with the slider 3093 to drive the cleaning brush 3092 to clean the impurities on the heat collecting plate 310, the inner wall of the heat exchange tube 301 and the surface of the first heat exchange tube 303, and the cleaning brush 3092 cleans the impurities into the collection box 3097.

[0027] It should be noted that the calcining furnace body 1, the waste heat recovery device 302, the heat preservation water tank 305 and the heat collecting plate 310 in the above description are all relatively mature devices in the existing technology, and the specific models can be selected according to actual needs.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A calcining furnace with furnace gas waste heat recovery function, characterized in that: include: A calcining furnace body (1), wherein the top of the calcining furnace body (1) is connected to an air guide pipe (2); A recovery mechanism (3) capable of quickly recovering and utilizing the waste heat of the furnace gas, the recovery mechanism (3) being arranged on one side of the air guide pipe (2); The recovery mechanism (3) comprises a heat exchange tube (301) connected to one end of the air duct (2), a waste heat recovery device (302) is provided at one end of the heat exchange tube (301), and a cleaning component (309) is provided on the inner wall of the heat exchange tube (301).

2. The calcining furnace with furnace gas waste heat recovery function according to claim 1, characterized in that: The recovery mechanism (3) further comprises a first heat exchange tube (303) arranged on the inner wall of the heat exchange tube (301); a second heat exchange tube (304) is arranged on the inner wall of the heat exchange tube (301); the second heat exchange tube (304) is arranged on the outer wall of the first heat exchange tube (303); the first heat exchange tube (303) is connected to the second heat exchange tube (304); and a heat collecting plate (310) is arranged between the first heat exchange tube (303) and the second heat exchange tube (304).

3. The calcining furnace with furnace gas waste heat recovery function according to claim 2, characterized in that: One end of the second heat exchange tube (304) passes through the heat exchange cylinder (301) and is connected to the heat preservation water tank (305).

4. The calcining furnace with furnace gas waste heat recovery function according to claim 1, characterized in that: The outer wall of the heat exchange cylinder (301) is provided with a heat insulation plate (306).

5. The calcining furnace with furnace gas waste heat recovery function according to claim 1, characterized in that: A connecting pipe (307) is connected between the heat exchange cylinder (301) and the waste heat recovery device (302), and one end of the inner wall of the connecting pipe (307) is fixedly connected to a plurality of evenly distributed baffles (308).

6. The calcining furnace with furnace gas waste heat recovery function according to claim 1, characterized in that: The cleaning assembly (309) comprises a mounting ring (3091) slidably connected to the inner wall of the heat exchange cylinder (301), a cleaning brush (3092) being fixedly connected to the inner wall of the mounting ring (3091), and a plurality of evenly distributed sliding blocks (3093) being fixedly connected to the outer wall of the mounting ring (3091).

7. The calcining furnace with furnace gas waste heat recovery function according to claim 6, characterized in that: One end of the mounting ring (3091) is fixedly connected to a plurality of evenly distributed support rods (3094), and one end of the support rod (3094) passes through the heat exchange cylinder (301) and is fixedly connected to a fixing ring (3095).

8. The calcining furnace with furnace gas waste heat recovery function according to claim 1, characterized in that: A placement box (3096) is fixedly connected to the bottom of one end of the heat exchange cylinder (301), and a collection box (3097) is slidably connected to the inner wall of the placement box (3096).

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