Cement kiln capable of recycling waste heat

Abstract

The utility model relates to the technical field of cement kilns, and discloses a cement kiln capable of recovering waste heat. The cement kiln capable of recycling waste heat comprises a filter box, a spraying device is fixedly installed on one side of the filter box, a draw-off pump is fixedly installed at the top of the filter box, a temperature detector is fixedly installed on one side of the draw-off pump, and heat preservation cotton is fixedly installed on the outer side of the filter box. A heat insulation shell is fixedly installed on the outer side of the heat preservation cotton, and a waste box is movably connected to the bottom of the interior of the filter box. The heat preservation cotton and the heat preservation shell on the outer side of the filter box are used for conducting heat preservation on the filter box, exhausted high-temperature flue gas is fed into the bottom of the interior of the filter box through the sucking pump, and impurities in the high-temperature flue gas can be filtered through the filter screen on one side of the supporting frame; and through operation of an electric sliding groove, a sliding block can move, and in cooperation with operation of an electric brush, dust and impurities blocked in the filter screen are brushed away.

Description

Technical Field

[0001] This utility model relates to the field of cement kiln technology, specifically to a cement kiln with waste heat recovery capability. Background Technology

[0002] A kiln is a type of kiln. Based on the heat source, it can be divided into flame kilns and electric kilns. Based on the type of material being calcined, it can be divided into ceramic kilns, cement kilns, glass kilns, enamel kilns, etc. The former can be further divided into continuous kilns (tunnel kilns), semi-continuous kilns, and intermittent kilns based on their operating methods. During the firing process in a kiln, the exhaust gas contains a large amount of heat, and direct discharge would be wasteful. Therefore, waste heat recovery devices are typically used to recover and reuse the waste heat from the exhaust gas.

[0003] The existing Chinese utility model patent with publication number CN219714047U discloses a waste heat recovery device for furnace flues, including a support base, a shell, a first housing, a heat exchanger, and an insulation box. The shell is fixedly connected to the top left side of the support base, the first housing is fixedly connected to the top left side of the support base and located on the right side of the shell, the heat exchanger is fixedly connected to the top middle of the support base, and the insulation box is fixedly connected to the top right side of the support base. A control panel is fixedly connected to the right side of the front wall of the support base. A flue gas guide pipe is inserted into the lower middle of the left side wall of the shell. A filter layer is fixedly connected between the middle of the inner side walls of the shell, arranged sequentially from top to bottom. A demister is fixedly connected between the upper sides of the inner side walls of the shell. This waste heat recovery device for furnace flues effectively avoids pollution to the water to be heated after waste heat recovery, making it relatively environmentally friendly.

[0004] Although the aforementioned waste heat recovery equipment for furnace flues solves the problem of existing waste heat recovery devices for furnace flues by guiding the flue gas generated in the furnace into the shell through the flue pipe, which usually uses heat exchange for waste heat recovery, the flue gas discharged from the furnace contains a large amount of sulfides. Direct use of waste heat recovery will pollute the water to be heated, which is not good for the environment. However, the filtration effect of the above-mentioned equipment is not good. The filter layer is easy to be blocked and is not easy to clean, thus affecting the flue gas discharge effect. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a cement kiln with waste heat recovery capability, which has advantages such as excellent anti-clogging effect and easy cleaning, thus solving the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a cement kiln with waste heat recovery capability, comprising:

[0009] A filter box is provided, with a spray device fixedly installed on one side, a suction pump fixedly installed on the top, a temperature detector fixedly installed on one side of the suction pump, insulation cotton fixedly installed on the outside of the filter box, and an insulation shell fixedly installed on the outside of the insulation cotton. A waste box is movably connected to the bottom of the filter box, and a support frame is movably connected to the inside of the filter box. A handle is fixedly installed on one side of the support frame, and two electric sliding tracks are fixedly installed on both sides of the other side of the support frame. A sliding block is movably connected inside the electric sliding track, and an electric brush is movably connected to one side of the sliding block. A filter screen is fixedly installed on the bottom of one side of the support frame.

[0010] As a preferred embodiment of this utility model, an air pump is fixedly installed on the bottom side of the filter box, and an exhaust pipe is fixedly installed on the top of the air pump. The exhaust pipe is a structure used for exhausting smoke.

[0011] As a preferred embodiment of this utility model, an insulation pipe is fixedly installed on the outside of the flue pipe, and a kiln body is fixedly installed on one side of the insulation pipe.

[0012] As a preferred embodiment of this utility model, a first heat exchanger is fixedly installed on one side of the extraction pump, and a connecting pipe is fixedly installed on one side of the first heat exchanger. The connecting pipe is a structure for connection.

[0013] As a preferred embodiment of this utility model, a temperature detector is fixedly installed on the left side of the connecting pipe, and a control valve is fixedly installed on the outside of the connecting pipe. The control valve is a structure used for control.

[0014] As a preferred embodiment of this utility model, a second heat exchanger is fixedly installed on one side of the control valve, and a flue gas pipe is fixedly installed on one side of the second heat exchanger. The flue gas pipe is a structure used to transport flue gas.

[0015] As a preferred embodiment of this utility model, a filter device is fixedly installed on one side of the connecting pipe, and the filter device is a structure used for filtration.

[0016] Compared with the prior art, this utility model provides a cement kiln with waste heat recovery capability, which has the following beneficial effects:

[0017] 1. This utility model insulates the filter box with insulation cotton and an insulation shell on the outside. A vacuum pump sends the discharged high-temperature flue gas into the bottom of the filter box. Impurities in the high-temperature flue gas are filtered through a filter screen on one side of the support frame. An electric sliding chute moves a sliding block, which, in conjunction with an electric brush, brushes the filter screen, removing dust and impurities that clog it. These impurities fall into a waste collection box. Pulling the handle removes the support frame, facilitating filter screen maintenance and cleaning. This improves the convenience and filtration effect of the waste heat recovery cement kiln, preventing clogging problems.

[0018] 2. This utility model uses a pump to send the filtered flue gas into the first heat exchanger for heat exchange, and then discharges it through the connecting pipe. The temperature is monitored by a temperature detector. When the temperature is low, the flue gas is sent into the filter device through the connecting pipe by a control valve for filtration. When the flue gas temperature is high enough for secondary heat exchange, the flue gas is sent into the second heat exchanger for secondary heat exchange by a control valve. After heat exchange, the flue gas is sent back into the connecting pipe through the flue gas pipe, and finally sent into the filter device for filtration, thus improving the heat exchange effect of the cement kiln with waste heat recovery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the filter box of this utility model;

[0021] Figure 3 This is a schematic diagram of the support frame of this utility model;

[0022] Figure 4 This is a schematic diagram of the air pump of this utility model;

[0023] Figure 5 This is a schematic diagram of the first heat exchanger of this utility model.

[0024] The components include: 1. Filter box; 11. Spray device; 12. Extraction pump; 13. Temperature detector; 14. Insulation cotton; 15. Insulation shell; 16. Waste box; 2. Support frame; 21. Handle; 22. Electric slide; 23. Sliding block; 24. Electric brush; 25. Filter screen; 3. Air pump; 31. Exhaust pipe; 32. Insulation pipe; 33. Kiln body; 4. First heat exchanger; 41. Connecting pipe; 42. Temperature detector; 43. Control valve; 44. Second heat exchanger; 45. Flue gas pipe; 46. Filter device. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0026] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figure 1 - Figure 5 In this embodiment, a cement kiln with waste heat recovery capability includes: a filter box 1, a spray device 11 fixedly installed on one side of the filter box 1, a pump 12 fixedly installed on the top of the filter box 1, a temperature detector 13 fixedly installed on one side of the pump 12, insulation cotton 14 fixedly installed on the outside of the filter box 1, a heat insulation shell 15 fixedly installed on the outside of the insulation cotton 14, and a waste box 16 movably connected to the bottom of the filter box 1.

[0029] Specifically, the outer side of the filter box 1 can be insulated by the insulation cotton 14 and the heat insulation shell 15, which prevents heat loss. The waste box 16 can collect dust, equipment and waste liquid, and the extraction pump 12 can extract the flue gas.

[0030] The filter box 1 is internally connected to a support frame 2. A handle 21 is fixedly installed on one side of the support frame 2. Two electric slides 22 are fixedly installed on the other side of the support frame 2. A sliding block 23 is internally connected to the electric slide 22. An electric brush 24 is movably connected to one side of the sliding block 23. A filter screen 25 is fixedly installed at the bottom of one side of the support frame 2.

[0031] Specifically, the support frame 2 can support the two electric slides 22 and the filter screen 25. The operation of the electric slides 22 can cause the sliding block 23 to move inside, and the operation of the electric brush 24 can clean the filter screen 25.

[0032] A vacuum pump 3 is fixedly installed on the bottom side of the filter box 1, a smoke exhaust pipe 31 is fixedly installed on the top of the vacuum pump 3, an insulation pipe 32 is fixedly installed on the outside of the smoke exhaust pipe 31, and a kiln body 33 is fixedly installed on one side of the insulation pipe 32.

[0033] Specifically, the exhaust gas discharged from the kiln body 33 can be drawn into the interior of the filter box 1 by the air pump 3, and the outside of the exhaust pipe 31 can be insulated by the heat insulation pipe 32.

[0034] A first heat exchanger 4 is fixedly installed on one side of the extraction pump 12. A connecting pipe 41 is fixedly installed on one side of the first heat exchanger 4. A temperature detector 42 is fixedly installed on the left side of the connecting pipe 41. A control valve 43 is fixedly installed on the outside of the connecting pipe 41. A second heat exchanger 44 is fixedly installed on one side of the control valve 43. A flue gas pipe 45 is fixedly installed on one side of the second heat exchanger 44. A filter device 46 is fixedly installed on one side of the connecting pipe 41.

[0035] Specifically, after the flue gas is heated by the first heat exchanger 4, it is sent out through the connecting pipe 41. The temperature is detected by the temperature detector 42. When the temperature is high, it is sent to the second heat exchanger 44 through the control valve 43 for secondary heat exchange, thereby improving the waste heat recovery effect of the cement kiln that can recover waste heat.

[0036] In operation, the exhaust gas from the flue pipe 31 is first drawn into the filter box 1 by the air pump 3. The high-temperature flue gas is insulated by the insulation pipe 32 on the outside of the exhaust pipe 31. The flue gas is then filtered by two filter screens 25 inside the filter box 1, preventing dust and impurities from entering the heat exchanger and causing blockage. The operation of the electric slide chute 22 moves the sliding block 23 inside the electric slide chute 22, and the operation of the electric brush 24 removes the dust and impurities clogging the filter screens 25. The waste box 16 collects the dust, impurities, and waste liquid, facilitating the cleaning of waste liquid and impurities and improving the convenience of the waste heat recovery cement kiln. Pulling the handle 21 allows the support frame 2 to be removed. The filter screen 25 is cleaned and replaced, which improves the convenience and anti-clogging effect of the cement kiln with waste heat recovery. The filtered flue gas is sent into the first heat exchanger 4 by the extraction pump 12. The temperature of the flue gas can be detected by the temperature detector 13. After heat exchange in the first heat exchanger 4, it is discharged from the connecting pipe 41. The temperature is monitored by the temperature detector 42 on one side of the connecting pipe 41. When the temperature is low, the flue gas is sent into the filter device 46 through the connecting pipe 41 for filtration by the control valve 43. When the flue gas temperature is high and can be exchanged for heat again, the flue gas is sent into the second heat exchanger 44 through the control valve 43 for heat exchange. After heat exchange, it is sent back into the connecting pipe 41 through the flue gas pipe 45 and finally into the filter device 46 for filtration. This improves the heat exchange effect of the cement kiln with waste heat recovery and avoids the waste of waste heat.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement kiln with waste heat recovery capability, characterized in that, The waste heat recovery cement kiln includes a filter box (1), a spray device (11) fixedly installed on one side of the filter box (1), a pump (12) fixedly installed on the top of the filter box (1), a temperature detector (13) fixedly installed on one side of the pump (12), insulation cotton (14) fixedly installed on the outside of the filter box (1), and an insulation shell (15) fixedly installed on the outside of the insulation cotton (14). A waste box (16) is movably connected to the bottom of the filter box (1), and a support frame (2) is movably connected to the inside of the filter box (1). A handle (21) is fixedly installed on one side of the support frame (2), and two electric slides (22) are fixedly installed on both sides of the other side of the support frame (2). A sliding block (23) is movably connected inside the electric slide (22), and an electric brush (24) is movably connected to one side of the sliding block (23). A filter screen (25) is fixedly installed at the bottom of one side of the support frame (2).

2. The cement kiln with waste heat recovery according to claim 1, characterized in that: An air pump (3) is fixedly installed on one side of the bottom of the filter box (1), and an exhaust pipe (31) is fixedly installed on the top of the air pump (3).

3. A cement kiln with waste heat recovery capability according to claim 2, characterized in that: An insulation pipe (32) is fixedly installed on the outside of the flue pipe (31), and a kiln body (33) is fixedly installed on one side of the insulation pipe (32).

4. A cement kiln with waste heat recovery capability according to claim 1, characterized in that: A first heat exchanger (4) is fixedly installed on one side of the extraction pump (12), and a connecting pipe (41) is fixedly installed on one side of the first heat exchanger (4).

5. A cement kiln with waste heat recovery capability according to claim 4, characterized in that: A temperature detector (42) is fixedly installed on the left side of the connecting pipe (41), and a control valve (43) is fixedly installed on the outside of the connecting pipe (41).

6. A cement kiln with waste heat recovery capability according to claim 5, characterized in that: A second heat exchanger (44) is fixedly installed on one side of the control valve (43), and a flue gas pipe (45) is fixedly installed on one side of the second heat exchanger (44).

7. A cement kiln with waste heat recovery capability according to claim 5, characterized in that: A filter device (46) is fixedly installed on one side of the connecting pipe (41).

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