Rotary cement kiln waste heat recovery device with descaling function

Abstract

The utility model provides a cement rotary kiln waste heat recovery device with a descaling function, which comprises a cement rotary kiln body, a kiln tail smoke chamber and a waste heat recovery component, the kiln tail smoke chamber is arranged at the rear end of the cement rotary kiln body, two flue pipes are arranged on the upper surface of the kiln tail smoke chamber, the two flue pipes are the same in structure, and the waste heat recovery component is arranged in the kiln tail smoke chamber. Compared with the prior art, the kiln tail smoke chamber waste heat recovery device has the advantages that by arranging the waste heat recovery assembly, pollution to the environment and the workload of smoke treatment facilities can be reduced, energy utilization is improved, meanwhile, environment protection is facilitated, and the kiln tail smoke chamber waste heat recovery device is suitable for popularization and application. And by arranging the descaling part, cleaning is conducted through the high-pressure spray head and the high-pressure water pipe regularly or as required, the inner wall of the box body can be kept clean, the heat exchange efficiency is improved, and the waste heat recovery device can give full play to the heat energy recovery function of the waste heat recovery device.

Description

Technical Field

[0001] The utility model belongs to the field of cement rotary kiln waste heat recovery equipment, in particular to a cement rotary kiln waste heat recovery device with a descaling function. Background Art

[0002] Cement rotary kiln waste heat recovery units are used to recover the high-temperature waste heat generated during cement production. However, existing units suffer from a problem in practice: solid particulate matter in the flue gas easily deposits and adheres to the unit, forming scale. This is due to a lack of descaling components. This lack of descaling not only leads to the aforementioned problems but also increases the risk of scaling and requires more frequent equipment downtime for cleaning and maintenance, increasing production line downtime and reducing production efficiency. First, solid particulate matter in the flue gas easily deposits and adheres to the unit, forming scale. This scale reduces the heat transfer efficiency of the flue gas heat exchanger, leading to reduced performance. Furthermore, due to the presence of various pollutants and chemicals in the flue gas, these deposits can affect the durability and stability of the unit, increasing maintenance costs and frequency. Furthermore, scaling leads to more frequent equipment downtime for cleaning and maintenance, increasing production line downtime, reducing production efficiency, and negatively impacting overall production schedules. In addition, since scaling inside the waste heat recovery device will increase the flow resistance of the flue gas channel, it may affect the normal airflow distribution and the balance of input and output materials of the equipment, thereby further reducing the effectiveness and operating efficiency of the equipment. Therefore, a new structure is needed to solve the above technical problems. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cement rotary kiln waste heat recovery device with a descaling function to solve the problems raised in the above background technology.

[0004] The utility model is realized by the following technical solutions: a cement rotary kiln waste heat recovery device with a descaling function, comprising: a cement rotary kiln body, a kiln tail smoke chamber, and a waste heat recovery component. The rear end of the cement rotary kiln body is provided with a kiln tail smoke chamber, and a flue pipe is installed on the upper surface of the kiln tail smoke chamber. Two flue pipes are provided, and the two flue pipes have the same structure. One end of the flue pipe away from the kiln tail smoke chamber is connected to the waste heat recovery component through a pipeline. The waste heat recovery component comprises a box body, a spiral heat exchange pipe, a connecting pipe, Connecting pipe 2, supporting legs, drain pipe and descaling parts, connecting pipe 1 is installed on the upper surface of the box, spiral heat exchange tubes are installed inside the box, supporting legs and drain pipes are installed on the lower surface of the box, connecting pipe 2 is evenly installed on the front surface of the box, multiple descaling parts are installed inside the box, multiple descaling parts have the same structure and are evenly installed inside the box, the descaling parts include high-pressure water pipes and high-pressure nozzles, and multiple high-pressure nozzles are evenly installed on the outer surface of the high-pressure water pipe.

[0005] As a preferred embodiment, the interior of the cement rotary kiln body is connected to the kiln tail smoke chamber, and two flue pipes are symmetrically installed on the upper surface of the kiln tail smoke chamber. The two flue pipes are connected to the interior of the kiln tail smoke chamber, and the end of the flue pipe away from the kiln tail smoke chamber is connected to the interior of the box through connecting pipe 2.

[0006] As a preferred embodiment, a sealing ring is provided at the connection between the connecting pipe 2 and the box body and the flue pipe. The connecting pipe 2 is arranged at the lower edge of the front surface of the box body. A supporting leg is installed at each of the four corners of the lower surface of the box body. The bottom of the box body is designed as an inverted triangle.

[0007] As a preferred embodiment, a sewage pipe is installed at the center position of the lower surface of the box body, and the sewage pipe is connected to the interior of the box body. A solenoid valve is installed on the outer surface of the sewage pipe. A plurality of spiral heat exchange tubes are evenly installed inside the box body, and the plurality of spiral heat exchange tubes are connected to each other. Due to the heat transfer of the flue gas, the flue gas temperature will decrease. Lowering the flue gas temperature helps to reduce environmental pollution and the workload of the flue gas treatment facilities. While improving energy utilization, it is also beneficial to protect the environment.

[0008] As a preferred embodiment, connecting pipes 1 are symmetrically installed on the left and right halves of the upper surface of the box body, the inlet of the spiral heat exchange tube is connected to the connecting pipe 1 on the left half, and the outlet of the spiral heat exchange tube is connected to the connecting pipe 1 on the right half.

[0009] As a preferred embodiment, the end of the connecting pipe away from the box body is connected to the water supply equipment, the upper end of the high-pressure water pipe passes through the upper surface of the box body, and is arranged on the left surface and the right surface inside the box body. The end of the high-pressure water pipe away from the box body is connected to the water supply equipment through a pipe. The high-pressure water pipe is a heat-resistant steel pipe, and the descaling component can emit high-pressure water flow impact force. This high-pressure water flow can effectively clean and flush the dirt and solid particulate matter on the inner wall of the box body and the surface of the spiral heat exchange tube to avoid their adhesion and accumulation, and to a certain extent realize the descaling function, avoiding the adhesion and accumulation of dirt and solid particulate matter will lead to a decrease in the heat exchange efficiency of the waste heat recovery component. Therefore, by using high-pressure nozzles and high-pressure water pipes for cleaning regularly or as needed, the inner wall of the box body can be kept clean, the heat exchange efficiency can be improved, and the waste heat recovery device can fully exert its heat energy recovery function.

[0010] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: by setting up a waste heat recovery component, the waste heat recovery component includes a box body, a spiral heat exchange tube, a connecting pipe 1, a connecting pipe 2, a supporting leg, a sewage pipe and a descaling component. The upper surface of the box body is installed with a connecting pipe 1, the front surface of the box body is installed with a connecting pipe 2, and the interior of the box body is installed with a descaling component and a spiral heat exchange tube. When the flue gas in the flue pipe enters the box body, it will heat the water source inside the spiral heat exchange tube. At this time, the heat in the high-temperature flue gas will be transferred to the water source inside the spiral heat exchange tube, so that the water source is heated and the flue gas is cooled. By heating the water source, part of the waste heat in the flue gas is effectively recovered, and the energy utilization rate is improved. At the same time, due to the heat transfer, the flue gas temperature will be reduced. Lowering the flue gas temperature helps to reduce environmental pollution and the workload of the flue gas treatment facilities. While improving energy utilization, it is also beneficial to protect the environment.

[0011] By setting a descaling component, the descaling component includes a high-pressure water pipe and a high-pressure nozzle. A plurality of high-pressure nozzles are installed on the outer surface of the high-pressure water pipe, and the descaling component is arranged on the left and right sides of the interior of the box. The plurality of high-pressure nozzles can spray water onto the inner wall of the box of the waste heat recovery component and the surface of the spiral heat exchange tube through the high-pressure water pipe (operated when the waste heat recovery component is not in use), generating a high-pressure water flow impact force. This high-pressure water flow can effectively clean and flush the dirt and solid particulate matter on the inner wall of the box and the surface of the spiral heat exchange tube to avoid their adhesion and accumulation, thereby realizing the descaling function to a certain extent, avoiding the adhesion and accumulation of dirt and solid particulate matter will cause the heat exchange efficiency of the waste heat recovery component to decrease. Therefore, by using high-pressure nozzles and high-pressure water pipes for cleaning regularly or as needed, the inner wall of the box can be kept clean, the heat exchange efficiency can be improved, and the waste heat recovery device can fully exert its heat energy recovery function. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0013] Figure 1 This is a schematic diagram of the connection between a cement rotary kiln body and a kiln tail smoke chamber of a cement rotary kiln waste heat recovery device with a descaling function in the utility model.

[0014] Figure 2 This is a schematic diagram of a waste heat recovery component of a cement rotary kiln waste heat recovery device with a descaling function according to the present invention.

[0015] Figure 3 This is a schematic diagram of the internal structure of a waste heat recovery component of a cement rotary kiln waste heat recovery device with a descaling function according to the present invention.

[0016] In the figure, 100-cement rotary kiln body, 110-kiln tail smoke chamber, 120-flue pipe;

[0017] 200- box body, 210- connecting pipe 1, 220- high-pressure water pipe, 221- high-pressure nozzle, 230- supporting leg, 240- connecting pipe 2, 250- sewage pipe, 260- spiral heat exchange tube. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figures 1 to 3The utility model provides a technical solution: a cement rotary kiln waste heat recovery device with a descaling function, comprising: a cement rotary kiln body 100, a kiln tail smoke chamber 110, and a waste heat recovery component. The rear end of the cement rotary kiln body 100 is provided with a kiln tail smoke chamber 110, and a flue pipe 120 is installed on the upper surface of the kiln tail smoke chamber 110. There are two flue pipes 120, and the two flue pipes 120 have the same structure. The end of the flue pipe 120 away from the kiln tail smoke chamber 110 is connected to the waste heat recovery component through a pipeline. The waste heat recovery component includes a box body 200, a spiral heat exchange tube 260, a connecting pipe 1 210, and a connecting pipe 24 0, support legs 230, drain pipe 250 and descaling parts, a connecting pipe 1 210 is installed on the upper surface of the box body 200, a spiral heat exchange tube 260 is installed inside the box body 200, a supporting leg 230 and a drain pipe 250 are installed on the lower surface of the box body 200, a connecting pipe 240 is evenly installed on the front surface of the box body 200, a plurality of descaling parts are installed inside the box body 200, and the plurality of descaling parts have the same structure and are evenly installed inside the box body 200, the descaling parts include a high-pressure water pipe 220 and a high-pressure nozzle 221, and a plurality of high-pressure nozzles 221 are evenly installed on the outer surface of the high-pressure water pipe 220.

[0020] See also Figure 1 、 Figure 2 、 Figure 3 As an embodiment of the present invention, the interior of the cement rotary kiln body 100 is connected to the kiln tail smoke chamber 110. Two flue pipes 120 are symmetrically installed on the upper surface of the kiln tail smoke chamber 110. The two flue pipes 120 are connected to the interior of the kiln tail smoke chamber 110. The end of the flue pipe 120 away from the kiln tail smoke chamber 110 is connected to the interior of the box body 200 through a second connecting pipe 240.

[0021] A sealing ring is provided at the connection between the second connecting pipe 240, the box body 200 and the flue pipe 120. The second connecting pipe 240 is provided at the lower edge of the front surface of the box body 200. A supporting leg 230 is installed at each of the four corners of the lower surface of the box body 200. The bottom of the box body 200 is designed in an inverted triangle.

[0022] A drain pipe 250 is installed at the center of the lower surface of the box body 200. The drain pipe 250 is connected to the interior of the box body 200. A solenoid valve is installed on the outer surface of the drain pipe 250. A plurality of spiral heat exchange tubes 260 are evenly installed inside the box body 200. The plurality of spiral heat exchange tubes 260 are connected to each other.

[0023] Connecting pipes 210 are symmetrically mounted on the left and right halves of the upper surface of the housing 200. The inlet of the spiral heat exchange tube 260 is connected to the connecting pipe 210 on the left, and the outlet of the spiral heat exchange tube 260 is connected to the connecting pipe 210 on the right.

[0024] During use, the cement rotary kiln body 100 will generate flue gas after use. At this time, the flue gas will enter the kiln tail smoke chamber 110, and then the flue gas inside the kiln tail smoke chamber 110 will enter the box body 200 through the flue pipe 120. At this time, flue gas will enter the box body 200, and the high-temperature flue gas will wrap the spiral heat exchange tube 260. When the flue gas enters the box body 200, the user can inject unheated water into the spiral heat exchange tube 260 through the water supply equipment. Then, when the water source enters the spiral heat exchange tube 260, the high-temperature flue gas will heat the water source inside the spiral heat exchange tube 260, and use the heat of the high-temperature flue gas to transfer to the corresponding medium (water), thereby realizing energy recovery and cooling the high-temperature flue gas at the same time, effectively recovering part of the waste heat in the flue gas, and improving energy utilization. At the same time, due to the heat transfer, the flue gas temperature will decrease. Lowering the flue gas temperature helps to reduce environmental pollution and the workload of the flue gas treatment facilities, while improving energy utilization, it is also beneficial to protect the environment.

[0025] See also Figure 1 、 Figure 2 、 Figure 3 As an embodiment of the present invention: the end of the connecting pipe 210 away from the box 200 is connected to the water supply equipment, the upper end of the high-pressure water pipe 220 passes through the upper surface of the box 200 and is arranged on the left and right surfaces inside the box 200. The end of the high-pressure water pipe 220 away from the box 200 is connected to the water supply equipment through a pipe. The high-pressure water pipe 220 is a heat-resistant steel pipe;

[0026] During use, since the flue gas contains a large amount of dust and solid particles, when entering the box body 200 for heat exchange, they will adhere to the interior of the box body 200 and the surface of the spiral heat exchange tube 260. When the entire device is in use, the user can start the water supply equipment, and the water supply equipment injects water into the high-pressure water pipe 220 through the pipeline. Then, the water source inside the high-pressure water pipe 220 will be ejected due to the high-pressure nozzle 221 on its outer surface, and the impact force of high-pressure water flow will be generated at this time. This high-pressure water flow can effectively clean and flush the inner wall of the box body 200 and the spiral heat exchange tube. Dirt and solid particulate matter on the surface of 260 are prevented from adhering and accumulating, thereby achieving the descaling function to a certain extent. Preventing the adhering and accumulation of dirt and solid particulate matter will lead to a decrease in the heat exchange efficiency of the waste heat recovery component. Therefore, by using the high-pressure nozzle 221 and the high-pressure water pipe 220 for cleaning regularly or as needed, the inner wall of the box 200 can be kept clean, the heat exchange efficiency can be improved, and the waste heat recovery device can give full play to its heat energy recovery function. Then the washed water and solid particles fall back to the bottom of the box 200, and then the user can open the valve of the sewage pipe 250 to discharge the sewage.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cement rotary kiln waste heat recovery device with a descaling function, comprising: A cement rotary kiln body (100), a kiln tail smoke chamber (110), and a waste heat recovery component, characterized in that the kiln tail smoke chamber (110) is provided at the rear end of the cement rotary kiln body (100), a flue pipe (120) is installed on the upper surface of the kiln tail smoke chamber (110), two flue pipes (120) are provided, and the two flue pipes (120) have the same structure; One end of the flue pipe (120) away from the kiln tail smoke chamber (110) is connected to a waste heat recovery component through a pipeline. The waste heat recovery component includes a box (200), a spiral heat exchange pipe (260), a connecting pipe 1 (210), a connecting pipe 2 (240), a support leg (230), a sewage pipe (250), and a descaling component. The connecting pipe 1 (210) is installed on the upper surface of the box (200), and the spiral heat exchange pipe (260) is installed inside the box (200); The lower surface of the box body (200) is installed with a support leg (230) and a sewage pipe (250), the front surface of the box body (200) is evenly installed with a second connecting pipe (240), and the interior of the box body (200) is installed with a plurality of descaling components, the plurality of descaling components having the same structure and evenly installed inside the box body (200), the descaling components including a high-pressure water pipe (220) and a high-pressure nozzle (221), and the outer surface of the high-pressure water pipe (220) is evenly installed with a plurality of high-pressure nozzles (221).

2. The waste heat recovery device for a cement rotary kiln with a descaling function according to claim 1, characterized in that: The interior of the cement rotary kiln body (100) is connected to the kiln tail smoke chamber (110), and two flue pipes (120) are symmetrically installed on the upper surface of the kiln tail smoke chamber (110). The two flue pipes (120) are connected to the interior of the kiln tail smoke chamber (110), and one end of the flue pipe (120) away from the kiln tail smoke chamber (110) is connected to the interior of the box (200) through a second connecting pipe (240).

3. The waste heat recovery device for a cement rotary kiln with a descaling function according to claim 2, characterized in that: A sealing ring is provided at the connection between the second connecting pipe (240), the box body (200) and the flue pipe (120). The second connecting pipe (240) is provided at the lower edge of the front side surface of the box body (200). A supporting leg (230) is respectively installed at the four corners of the lower side surface of the box body (200). The bottom of the box body (200) is designed to be an inverted triangle.

4. The waste heat recovery device for a cement rotary kiln with a descaling function according to claim 3, characterized in that: A sewage pipe (250) is installed at the center of the lower surface of the box body (200), and the sewage pipe (250) is connected to the interior of the box body (200). A solenoid valve is installed on the outer surface of the sewage pipe (250). A plurality of spiral heat exchange tubes (260) are evenly installed inside the box body (200), and the plurality of spiral heat exchange tubes (260) are connected to each other.

5. The waste heat recovery device for a cement rotary kiln with a descaling function according to claim 4, characterized in that: Connecting pipes 1 (210) are symmetrically installed on the left and right halves of the upper surface of the box body (200), respectively. The inlet of the spiral heat exchange tube (260) is connected to the connecting pipe 1 (210) on the left half, and the outlet of the spiral heat exchange tube (260) is connected to the connecting pipe 1 (210) on the right half.

6. The waste heat recovery device for a cement rotary kiln with a descaling function according to claim 1, characterized in that: The end of the connecting pipe (210) away from the box (200) is connected to the water supply equipment, the upper end of the high-pressure water pipe (220) passes through the upper surface of the box (200) and is arranged on the left surface and the right surface inside the box (200), and the end of the high-pressure water pipe (220) away from the box (200) is connected to the water supply equipment through a pipeline, and the high-pressure water pipe (220) is a heat-resistant steel pipe.

Images