A rotary kiln waste heat power generation circulating cooling device
Patent Information
- Application Number
- CN202522181426.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-10-15
AI Technical Summary
[0003]本实用新型的主要目的在于提供一种回转窑余热发电循环冷却装置，可以有效解决现有技术中冷凝效率低、维护不便以及能量未能梯级利用导致能耗较高的问题
1、本实用新型提供一种回转窑余热发电循环冷却装置，通过设置换热机构，利用高温冷却水的余热对冷凝水进行预热，有效降低了余热锅炉的加热能耗，实现了能量的梯级利用，提升了整体系统的热经济性。
Smart Images
Figure CN224772084U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotary kiln technology, and in particular to a rotary kiln waste heat power generation and circulating cooling device. Background Technology
[0002] Rotary kilns, as core thermal equipment in industries such as building materials, metallurgy, and chemicals, generate large amounts of high-temperature waste gas during operation, typically between 300℃ and 600℃. To achieve cascaded energy utilization and reduce production costs, waste heat power generation technology has been widely applied to production lines equipped with rotary kilns. This technology usually utilizes a waste heat boiler to convert the heat energy of the kiln tail waste gas into steam, which then drives a steam turbine generator set to generate electricity. In the waste heat power generation system, the exhaust steam after the turbine has performed its work needs to be condensed into water before being pumped back to the boiler for reheating, completing the thermal cycle. This condensation process is completed by a circulating cooling device (i.e., a condensation system), the performance of which directly affects the thermal efficiency and output of the entire power generation system. The existing technology has the following problems: In existing technologies, condensate is directly returned to the waste heat boiler after collection, lacking effective waste heat recovery measures. This requires a large amount of energy to reheat the low-temperature condensate, increasing operating costs and failing to achieve full recycling of energy. Utility Model Content
[0003] The main purpose of this utility model is to provide a rotary kiln waste heat power generation and circulating cooling device, which can effectively solve the problems of low condensation efficiency, inconvenient maintenance, and high energy consumption caused by the failure to utilize energy in a cascade manner in the existing technology.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rotary kiln waste heat power generation circulating cooling device includes a waste steam cooling mechanism. A condensate collection mechanism is provided on the right side of the waste steam cooling mechanism, and a radiator body is provided on the left side of the waste steam cooling mechanism. A heat exchange mechanism is provided on the left side of the radiator body. The waste steam cooling mechanism includes a cooling box. A box support is fixedly installed at the bottom of the cooling box. A waste steam input pipe is fixedly connected to the top of the cooling box. An S-shaped heat conduction pipe is provided in the inner cavity of the cooling box. The top end of the S-shaped heat conduction pipe is fixedly connected to the bottom end of the waste steam input pipe. The other end of the S-shaped heat conduction pipe extends through to the lower right side of the cooling box and is fixedly connected to a condensate hose.
[0005] Preferably, the condensate collection mechanism includes a condensate collection tank, the top of which is fixedly connected to a retaining pipe that penetrates its inner cavity, a liquid level sensor is fixedly installed on the front right side of the top of the condensate collection tank, the liquid level sensor includes a water level detection probe that penetrates to the bottom of the inner cavity of the condensate collection tank, a water pump is fixedly installed on the front side of the condensate collection tank, the input end of the water pump extends to the bottom of the inner cavity of the condensate collection tank, and the output end of the water pump is fixedly connected to a water delivery hose.
[0006] Preferably, the end of the condensate hose away from the S-shaped heat pipe is threadedly connected to an insertion tube, the outer wall of the insertion tube is fitted with a rubber ring, the insertion tube is snapped into the inner ring of the clamping tube, and a filter screen is fixedly installed on the inner ring of the insertion tube.
[0007] Preferably, the heat exchange mechanism includes a condensate preheating tank, a second water pump is fixedly installed on the left side of the cooling box, the input end of the second water pump extends to the upper part of the inner cavity of the cooling box, the inner cavity of the condensate preheating tank is arranged in a ring array with several interconnected branch pipes, the output end of the second water pump extends to the inner cavity of the condensate preheating tank and is fixedly connected to the top end of several branch pipes, the bottom end of several branch pipes is fixedly connected to a centralized water supply pipe, and the other end of the centralized water supply pipe extends to the outside of the condensate preheating tank.
[0008] Preferably, the end of the water supply hose away from the first water pump extends into the inner cavity of the condensate preheating tank and is fixedly connected to an annular spray pipe. The bottom of the annular spray pipe is fixedly connected to a plurality of nozzles located above a plurality of branch pipes in an annular array. A third water pump is provided on the left side of the condensate preheating tank. The input end of the third water pump extends into the bottom of the inner cavity of the condensate preheating tank. The output end of the third water pump is connected to a waste heat boiler for reheating the condensate.
[0009] Preferably, the radiator body includes a fixed box, the inner cavity of which is provided with a lower water chamber and an upper water chamber. A plurality of cooling water pipes are uniformly and fixedly connected between the opposite surfaces of the lower water chamber and the upper water chamber. A plurality of heat dissipation aluminum fins are provided on the outer walls of the plurality of cooling water pipes. The end of the centralized water supply pipe away from the branch pipe is fixedly connected to the lower water chamber. A cooling water return pipe that runs through the inner cavity of the upper water chamber is fixedly installed. A cooling fan is provided in the inner cavity of the fixed box in front of the plurality of heat dissipation aluminum fins to dissipate the heat transferred by the heat dissipation aluminum fins.
[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model provides a rotary kiln waste heat power generation circulating cooling device. By setting up a heat exchange mechanism, the waste heat of high-temperature cooling water is used to preheat the condensate, which effectively reduces the heating energy consumption of the waste heat boiler, realizes the cascade utilization of energy, and improves the thermal economy of the overall system.
[0011] 2. This utility model provides a rotary kiln waste heat power generation circulating cooling device. Through the cooperation between the condensate hose, the insertion pipe, and the filter screen, the filter screen used to filter impurities in the condensate can be quickly disassembled and cleaned, improving the convenience of cleaning the filter screen. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the waste steam cooling mechanism of this utility model; Figure 3 This is a schematic diagram of the condensate collection mechanism of this utility model; Figure 4 This is a schematic diagram of the heat exchange mechanism of this utility model; Figure 5 This is a schematic diagram of the main structure of the radiator of this utility model.
[0013] In the diagram: 1. Exhaust steam cooling mechanism; 11. Cooling tank; 111. Water pump II; 12. Tank support; 13. Exhaust steam input pipe; 14. S-shaped heat conduction pipe; 15. Condensate hose; 151. Insertion pipe; 152. Filter screen; 2. Condensate collection mechanism; 21. Condensate collection tank; 22. Clip-on pipe; 23. Liquid level sensor; 24. Water pump I; 25. Water delivery hose; 251. Annular spray pipe; 3. Heat exchange mechanism; 31. Condensate preheating tank; 32. Diversion pipe; 33. Centralized water delivery pipe; 34. Water pump III; 4. Radiator body; 41. Fixing box; 42. Lower water chamber; 43. Upper water chamber; 44. Cooling water pipe; 45. Heat dissipation aluminum fins; 46. Radiator fan; 47. Cooling water return pipe. Detailed Implementation
[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0015] like Figure 1 , Figure 2 , Figure 3As shown, a rotary kiln waste heat power generation circulating cooling device includes a waste steam cooling mechanism 1, a condensate collection mechanism 2 on the right side of the waste steam cooling mechanism 1, a radiator body 4 on the left side of the waste steam cooling mechanism 1, and a heat exchange mechanism 3 on the left side of the radiator body 4. The waste steam cooling mechanism 1 includes a cooling box 11, which is made of stainless steel to ensure corrosion resistance and structural strength. The cooling water filled in the cooling box 11 is softened water, and heat exchange stability is maintained through circulation. A box support 12 is fixedly installed at the bottom of the cooling box 11. The top of the cooling box 11 is fixedly connected to a waste steam inlet pipe 13. An S-shaped heat pipe 14 is installed inside the cooling box 11. The S-shaped heat pipe 14 is made of copper, and its S-shaped bend design increases the heat exchange area and improves condensation efficiency. The top end of the S-shaped heat pipe 14 is fixedly connected to the bottom end of the waste steam inlet pipe 13. The other end of the S-shaped heat pipe 14 extends to the lower right side of the cooling box 11 and is fixedly connected to a condensate hose 15. The condensate collection mechanism 2 includes a condensate collection tank 21, and a clamping pipe 22 penetrating its inner cavity is fixedly connected to the top of the condensate collection tank 21. A liquid level sensor 23 is fixedly installed on the top right front of the condensate collection tank 21. The liquid level sensor 23 includes a water level detection probe, which extends to the bottom of the inner cavity of the condensate collection tank 21. A water pump 24 is fixedly installed on the front side of the condensate collection tank 21, with its input end extending to the bottom of the inner cavity of the condensate collection tank 21. The liquid level sensor 23 is a capacitive liquid level sensor, and the water level detection probe is located at the bottom of the inner cavity of the condensate collection tank 21. When the water level reaches 80% of the tank height, the liquid level sensor 23 outputs a signal to the water pump. The controller of pump 124 automatically starts pump 124. The output end of pump 124 is fixedly connected to a water delivery hose 25. The end of the condensate hose 15 away from the S-shaped heat conduction tube 14 is threadedly connected to an insertion tube 151. The outer wall of the insertion tube 151 is fitted with a rubber ring. The insertion tube 151 is snapped into the inner ring of the clamping tube 22. A filter screen 152 is fixedly installed on the inner ring of the insertion tube 151. The rubber ring of the insertion tube 151 is made of nitrile rubber and its inner diameter matches that of the clamping tube 22 to ensure a tight seal. The filter screen 152 is made of stainless steel and is used to filter solid impurities in the condensate. In operation, the exhaust steam output end of the steam turbine is connected to the exhaust steam input pipe 13, allowing the exhaust steam to enter the inner cavity of the curved, multi-layered S-shaped heat-conducting pipe 14. The steam is then cooled by the cooling water filling the inner cavity of the cooling tank 11, causing it to condense into water. This water then flows through the condensate hose 15 to the condensate collection tank 21. The condensate hose 15 can be sealed by a rubber ring on the outer wall of the insertion pipe 151, which engages with the inner ring of the clamping pipe 22. This ensures that the condensate is filtered through the filter screen 152 before entering the inner cavity of the condensate collection tank 21, thus maintaining the purity of the condensate. After pulling out the insertion tube 151 at any time, the entire insertion tube 151 can be removed by using the threaded connection between the insertion tube 151 and the bottom threaded groove of the condensate hose 15, which facilitates the cleaning of the filter screen 152. At the same time, the condensate collection tank 21 is equipped with an exhaust valve to discharge excess gas, and the signal output terminal of the liquid level sensor 23 is connected to the signal receiving terminal of the water pump 24 by wire. When the water source in the inner cavity of the condensate collection tank 21 is about to be full, the liquid level sensor 23 can send an electrical signal to the water pump 24 to start the water pump 24, thereby discharging the collected condensate through the water delivery hose 25.
[0016] like Figure 4 As shown, the heat exchange mechanism 3 includes a condensate preheating tank 31. The condensate preheating tank 31 is an insulated tank with an outer shell made of 304 stainless steel and an inner lining of ceramic fiber insulation to ensure minimal heat loss. A second water pump 111 is fixedly installed on the left side of the cooling box 11. The input end of the second water pump 111 extends to the top of the inner cavity of the cooling box 11. Several interconnected branch pipes 32 are arranged in a circular array inside the condensate preheating tank 31. The output end of the second water pump 111 extends into the inner cavity of the condensate preheating tank 31 and is fixedly connected to the top end of the several branch pipes 32. A centralized water supply pipe 33 is fixedly connected to the bottom end of the several branch pipes 32. The other end of the centralized water supply pipe 33... The end of the water supply hose 25 extends to the outside of the condensate preheating tank 31. The end of the water supply hose 25 away from the water pump 24 extends into the inner cavity of the condensate preheating tank 31 and is fixedly connected to an annular spray pipe 251. The bottom of the annular spray pipe 251 is fixedly connected to several nozzles located above several branch pipes 32 in an annular array. The nozzles of the annular spray pipe 251 are spiral nozzles with a spray angle of 90° to ensure that the condensate water evenly covers the surface of the branch pipes 32. A water pump 34 is set on the left side of the condensate preheating tank 31. The input end of the water pump 34 extends into the bottom of the inner cavity of the condensate preheating tank 31. The output end of the water pump 34 is connected to a waste heat boiler for reheating the condensate water. During the circulating cooling process, the cooling water in the inner cavity of the cooling tank 11 is drawn out by the second water pump 111 and injected into several branch pipes 32 in the inner cavity of the sealed and insulated condensate preheating tank 31. The branch pipes 32 are made of thermally conductive copper metal, which can conduct the temperature of the high-temperature cooling water that has absorbed the heat from the S-shaped heat pipe 14. This allows the condensate output through the water delivery hose 25 to be sprayed onto the surface of the branch pipes 32 through the nozzle at the bottom of the annular spray pipe 251, thereby achieving full heating of the condensate. Finally, the condensate is collected at the bottom of the inner cavity of the condensate preheating tank 31. The preheated condensate can be drawn out at any time by starting the third water pump 34 and discharged into the waste heat boiler, saving the energy consumption of the waste heat boiler for heating low-temperature condensate and improving heating efficiency.
[0017] like Figure 5 As shown, the radiator body 4 includes a fixed box 41. The inner cavity of the fixed box 41 is provided with a lower water chamber 42 and an upper water chamber 43. Several cooling water pipes 44 are uniformly fixedly connected between the opposite surfaces of the lower water chamber 42 and the upper water chamber 43. The cooling water pipes 44 are flat aluminum pipes. Several heat dissipation aluminum fins 45 are provided on the outer wall of the several cooling water pipes 44. The end of the centralized water supply pipe 33 away from the branch pipe 32 is fixedly connected to the lower water chamber 42. A cooling water return pipe 47 that runs through the inner cavity of the cooling box 11 is fixedly installed at the top of the upper water chamber 43. A cooling fan 46 is provided in front of the several heat dissipation aluminum fins 45 in the inner cavity of the fixed box 41 to dissipate the heat transferred by the heat dissipation aluminum fins 45. The high-temperature cooling water passing through the diversion pipe 32 is cooled down by the condensate. Then it is fed into the lower water chamber 42 through the central water supply pipe 33, and then into the upper water chamber 43 through several cooling water pipes 44. When passing through the cooling water pipes 44, the heat dissipation aluminum fins 45 on their outer walls can conduct the last remaining heat of the cooling water, and dissipate it quickly through the cooling fan 46. Finally, the cooling water is fed into the inner cavity of the cooling box 11 through the cooling water return pipe 47 connected to the top of the upper water chamber 43 to complete the cooling water circulation. The overall radiator body 4 is a prior art, such as automotive radiators, so its specific principle will not be described in detail here.
[0018] The working principle of the rotary kiln waste heat power generation and circulating cooling device will be explained in detail below.
[0019] like Figure 1-5As shown, during use, the exhaust steam output end of the steam turbine is connected to the exhaust steam input pipe 13, allowing the exhaust steam to enter the inner cavity of the curved multi-layered S-shaped heat conduction pipe 14. The steam is then cooled by the cooling water filling the inner cavity of the cooling tank 11, causing it to condense into water. The water then flows through the condensate hose 15 to the condensate collection tank 21. The condensate hose 15 can be sealed by the rubber ring on the outer wall of the insertion pipe 151 into the inner ring of the clamping pipe 22. This ensures that the condensate is filtered through the filter screen 152 before entering the inner cavity of the condensate collection tank 21, thus maintaining the purity of the condensate. The insertion pipe 151 can be easily removed at any time, and the entire insertion pipe 151 can be disassembled by using the threaded connection between the insertion pipe 151 and the condensate hose 15 at the bottom threaded groove, facilitating cleaning of the filter screen 152. The condensate collection tank 21 is equipped with an exhaust valve to discharge excess gas, and the signal output end of the liquid level sensor 23 is connected to the signal receiver of the water pump 24. With the end wire connected, when the water source in the inner cavity of the condensate collection tank 21 is almost full, the water level sensor 23 can send an electrical signal to the water pump 24 to start the water pump 24, thereby discharging the collected condensate through the water delivery hose 25. During the circulation cooling, the cooling water in the inner cavity of the cooling tank 11 is drawn out by the water pump 211 and injected into several diversion pipes 32 in the inner cavity of the sealed and insulated condensate preheating tank 31. The diversion pipes 32 are made of thermally conductive copper metal, which can conduct the temperature of the high-temperature cooling water that has absorbed the heat of the S-shaped heat conduction pipe 14, so that the condensate output through the water delivery hose 25 can be sprayed onto the surface of the diversion pipes 32 through the nozzle at the bottom of the annular spray pipe 251, thereby achieving full heating of the condensate. Finally, it is collected at the bottom of the inner cavity of the condensate preheating tank 31, and the preheated condensate can be drawn out at any time by starting the water pump 34 and discharged into the waste heat boiler, saving the energy consumption of the waste heat boiler for heating low-temperature condensate and improving heating efficiency.
[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A rotary kiln waste heat power generation cycle cooling device comprising a spent steam cooling mechanism (1), characterized in that: A condensate collection mechanism (2) is provided on the right side of the waste steam cooling mechanism (1), a radiator body (4) is provided on the left side of the waste steam cooling mechanism (1), a heat exchange mechanism (3) is provided on the left side of the radiator body (4), the waste steam cooling mechanism (1) includes a cooling box (11), a box support (12) is fixedly installed at the bottom of the cooling box (11), a waste steam input pipe (13) is fixedly connected to the top of the cooling box (11), an S-shaped heat conduction pipe (14) is provided in the inner cavity of the cooling box (11), the top end of the S-shaped heat conduction pipe (14) is fixedly connected to the bottom end of the waste steam input pipe (13), and the other end of the S-shaped heat conduction pipe (14) extends to the lower right side of the cooling box (11) and is fixedly connected to a condensate hose (15).
2. A rotary kiln waste heat power generation cycle cooling device according to claim 1, characterized in that: The condensate collection mechanism (2) includes a condensate collection tank (21). A clamping pipe (22) that penetrates the inner cavity is fixedly connected to the top of the condensate collection tank (21). A liquid level sensor (23) is fixedly installed on the right front of the top of the condensate collection tank (21). The liquid level sensor (23) includes a water level detection probe, and the water level detection probe penetrates to the bottom of the inner cavity of the condensate collection tank (21). A water pump (24) is fixedly installed on the front side of the condensate collection tank (21). The input end of the water pump (24) penetrates to the bottom of the inner cavity of the condensate collection tank (21). A water delivery hose (25) is fixedly connected to the output end of the water pump (24).
3. A rotary kiln waste heat power generation cycle cooling device according to claim 2, characterized in that: The end of the condensate hose (15) away from the S-shaped heat pipe (14) is threaded with an insertion tube (151). The outer wall of the insertion tube (151) is fitted with a rubber ring. The insertion tube (151) is snapped into the inner ring of the clamping tube (22). A filter screen (152) is fixedly installed on the inner ring of the insertion tube (151).
4. The rotary kiln waste heat power generation circulating cooling device according to claim 2, characterized in that: The heat exchange mechanism (3) includes a condensate preheating tank (31). A second water pump (111) is fixedly installed on the left side of the cooling box (11). The input end of the second water pump (111) extends to the top of the inner cavity of the cooling box (11). The inner cavity of the condensate preheating tank (31) is arranged in a ring array with several interconnected branch pipes (32). The output end of the second water pump (111) extends through the inner cavity of the condensate preheating tank (31) and is fixedly connected to the top of several branch pipes (32). The bottom ends of several branch pipes (32) are fixedly connected to a centralized water supply pipe (33). The other end of the centralized water supply pipe (33) extends through to the outside of the condensate preheating tank (31).
5. A rotary kiln waste heat power generation cycle cooling device according to claim 2, characterized in that: The end of the water supply hose (25) away from the water pump (24) passes through the inner cavity of the condensate preheating tank (31) and is fixedly connected to an annular spray pipe (251). The bottom of the annular spray pipe (251) is fixedly connected to a number of nozzles located above a number of branch pipes (32). A water pump (34) is provided on the left side of the condensate preheating tank (31). The input end of the water pump (34) passes through the bottom of the inner cavity of the condensate preheating tank (31). The output end of the water pump (34) is connected to a waste heat boiler for reheating the condensate.
6. A rotary kiln waste heat power generation cycle cooling device according to claim 4, characterized in that: The radiator body (4) includes a fixed box (41). The inner cavity of the fixed box (41) is provided with a lower water chamber (42) and an upper water chamber (43). A number of cooling water pipes (44) are uniformly fixedly connected between the opposite surfaces of the lower water chamber (42) and the upper water chamber (43). A number of heat dissipation aluminum fins (45) are provided on the outer walls of the cooling water pipes (44). The end of the centralized water supply pipe (33) away from the branch pipe (32) is fixedly connected to the lower water chamber (42). A cooling water return pipe (47) that runs through the inner cavity of the cooling box (11) is fixedly installed at the top of the upper water chamber (43). A heat dissipation fan (46) is provided in front of the heat dissipation aluminum fins (45) in the inner cavity of the fixed box (41) to dissipate the heat transferred by the heat dissipation aluminum fins (45).