High-temperature flue gas waste heat utilization device

Abstract

The utility model discloses a high-temperature flue gas waste heat utilization device, which belongs to the technical field of waste heat utilization and comprises a smoke exhaust pipeline, an air supply pipeline, a centrifugal fan and a dividing wall type heat exchanger, the smoke exhaust pipeline is arranged at a top smoke outlet of a kiln, one end of the bottom of the smoke exhaust pipeline is connected with the air supply pipeline, and the centrifugal fan is arranged at one end, close to the smoke exhaust pipeline, of the air supply pipeline. The end, away from the smoke exhaust pipeline, of the air supply pipeline is connected with a dividing wall type heat exchanger through a lengthened conveying pipe. The waste heat recovery device has the advantages that the waste heat recovery device is connected to the smoke exhaust pipeline of the kiln, high-temperature smoke of the smoke exhaust pipeline can be extracted to the air supply pipeline under the action of the centrifugal fan, and the high-temperature smoke is conveyed to a dividing wall type heat exchanger at a heat using place along the air supply pipeline for waste heat recovery. Afterwards, the smoke after heat exchange can return to the smoke exhaust pipeline through the air outlet pipeline to be exhausted, so that the conveying efficiency of the high-temperature smoke is improved, and the high-temperature smoke can reach a designated place as soon as possible for heat exchange.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat utilization technical field, specifically, relate to a high temperature flue gas waste heat utilization device. BACKGROUND

[0002] The traditional sanitary ceramic factory adopts the heat exchanger of the partition wall type to heat exchange, utilizes high temperature flue gas to heat air or water, and then transports the hot air and hot water to the heat using place to radiate heat again, the defect of this kind of mode lies in, the whole process adopts twice heat exchange, the heat exchange efficiency is not high, cannot utilize this part of waste heat efficiently, and, the equipment used in the whole system is too much, increases the heat using cost.

[0003] The prior art high temperature flue gas waste heat utilization device is inconvenient to quickly send high temperature flue gas to the heat using place to recycle waste heat, loses more heat during the conveying process, and the heat exchange efficiency and waste heat recycling effect are not high, and the practicability and durability of the device itself also need to be improved, and simultaneously, the utility model discloses a kind of coal-saving power generation device of cement plant low temperature waste heat utilization, belong to low temperature waste heat recycling coal-saving power generation technical field.In the utility model, the flue gas of kiln head boiler outlet is introduced into high temperature wear-resistant fan, the exhaust gas of kiln head boiler is introduced into grate cooler by high temperature wear-resistant fan, by installing cement kiln heat exchange device, utilize the waste heat of cement kiln, the hot air after heating is introduced into high temperature wear-resistant fan entrance by hot air pipeline, improve the air temperature of entering grate cooler, and the hot water or steam generated in the cement kiln heat exchange device is introduced into the heat exchanger of outlet flue of high temperature wear-resistant fan, heat the flue gas, improve the cooling air temperature of entering grate cooler, which is inconvenient to quickly send high temperature flue gas to the heat using place to recycle waste heat, loses more heat during the conveying process, and the heat exchange efficiency is not high. SUMMARY

[0004] In order to overcome the problems in the prior art that it is inconvenient to quickly send high temperature flue gas to the heat using place to recycle waste heat, loses more heat during the conveying process, and the heat exchange efficiency and waste heat recycling effect are not high, and the practicability and durability of the device itself also need to be improved, the utility model provides a kind of high temperature flue gas waste heat utilization device, including exhaust pipe, air supply pipe, centrifugal fan and partition wall type heat exchanger, the exhaust pipe is arranged at the top smoke outlet of kiln, and the bottom is connected with air supply pipe at one end, the centrifugal fan is arranged at the one end of air supply pipe close to the exhaust pipe, the partition wall type heat exchanger is connected with air supply pipe at the one end far from the exhaust pipe by lengthening conveying pipe, the partition wall type heat exchanger is arranged at the position beside heat using place, the exhaust port of partition wall type heat exchanger is connected with air outlet pipe, and the air outlet pipe is connected with the top of exhaust pipe.

[0005] The device is connected to the kiln exhaust pipe, under the action of the centrifugal fan, high-temperature flue gas in the exhaust pipe can be extracted to the air supply pipe, and then transported to the partition heat exchanger at the heat supply site for waste heat recovery, and then the flue gas after heat exchange can be returned to the exhaust pipe through the air outlet pipe, thereby improving the transportation efficiency of high-temperature flue gas, making it reach the designated site for heat exchange as soon as possible, reducing the heat dissipation generated by high-temperature flue gas transportation, and further improving the heat exchange effect and practicability of the device.

[0006] Preferably, an electric air volume regulating valve is installed between the centrifugal fan and the exhaust pipe on the air supply pipe, an air outlet valve is installed on the air outlet pipe, and a control valve is installed in the middle of the exhaust pipe.

[0007] Preferably, a temperature sensing switch is installed at the connection between the air supply pipe and the exhaust pipe, and the detection end of the temperature sensing switch is arranged inside the connection between the air supply pipe and the exhaust pipe.

[0008] Preferably, the temperature sensing switch is connected with the electric air volume regulating valve, and a standby valve is installed at a position beside the electric air volume regulating valve.

[0009] The temperature sensing switch arranged at the connection between the air supply pipe and the exhaust pipe can monitor the temperature inside the exhaust pipe, and when the temperature is too low, the electric air volume regulating valve can be controlled to be closed, so that low-temperature flue gas cannot pass through the air supply pipe to the partition heat exchanger, thereby affecting waste heat recovery.

[0010] Preferably, a detection box is installed on the air supply pipe, a safety detection assembly is installed on the detection box, the safety detection assembly includes an alarm and a pressure detector, the pressure detector is installed in the detection box and the detection end is connected with the inner wall of the air supply pipe, the alarm is installed on the top of the detection box, and the alarm is electrically connected with the pressure detector.

[0011] Preferably, a display and an indicator light are installed on the front of the detection box, the display is connected with the pressure detector, and the indicator light is connected with the temperature sensing switch.

[0012] Preferably, a reinforcing sleeve is arranged outside the air supply pipe and the lengthened conveying pipe, a heat preservation sleeve is arranged on the outer wall of the reinforcing sleeve, and the material of the heat preservation sleeve is heat preservation cotton.

[0013] Preferably, a wear-resistant inner tube is arranged on the inner wall of the air supply pipe and the lengthened conveying pipe.

[0014] The heat preservation sleeve arranged outside the air supply pipe can improve the heat preservation capacity of the pipe and reduce heat loss, and the reinforcing sleeve arranged outside the air supply pipe can improve the strength of the pipe and prevent it from being damaged.

[0015] Preferably, the lengthened conveying pipe is connected with the air supply pipeline and the heat exchanger by flanges, and sealing rings are arranged at the connecting positions.

[0016] Preferably, the heat exchanger adopts finned tube heat dissipation, and the base pipe of the finned tube is made of stainless steel.

[0017] The heat exchanger can not be corroded by flue gas, and the fins are made of copper fins to increase the heat exchange area and the heat conductivity coefficient.

[0018] Beneficial effects:

[0019] The beneficial effects of the technical scheme of the present application are as follows:

[0020] (1) The device is connected to the kiln exhaust pipeline, and under the action of the centrifugal fan, the high-temperature flue gas in the exhaust pipeline can be extracted to the air supply pipeline and then conveyed to the heat exchanger of the heat utilization device, and the flue gas after heat exchange can be discharged through the air outlet pipeline, thereby improving the conveying efficiency of the high-temperature flue gas, making it reach the designated position for heat exchange as soon as possible, reducing the heat dissipation generated by the high-temperature flue gas conveying, and further improving the heat exchange effect and practicality of the device.

[0021] (2) The temperature sensor switch arranged at the connecting position of the air supply pipeline and the exhaust pipeline can monitor the temperature inside the exhaust pipeline, and when the temperature is too low, the electric air volume regulating valve can be controlled to be closed, so as to avoid the low-temperature flue gas from passing through the air supply pipeline to the heat exchanger, thereby affecting the waste heat recovery.

[0022] (3) The heat preservation sleeve arranged outside the air supply pipeline can improve the heat preservation capacity of the pipeline and reduce heat loss, and the reinforcing sleeve arranged outside the air supply pipeline can improve the strength of the pipeline and prevent it from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0024] Fig. 1 is a schematic view of the overall structure of the high-temperature flue gas waste heat utilization device of the present application;

[0025] Fig. 2 is a schematic view of the detection assembly of the high-temperature flue gas waste heat utilization device of the present application;

[0026] Fig. 3 is the internal structure schematic view of the detection box of the high-temperature flue gas waste heat utilization device,

[0027] Fig. 4 is the structure schematic view of the air supply pipeline of the high-temperature flue gas waste heat utilization device.

[0028] In the figure: 1, exhaust gas pipeline; 2, air supply pipeline; 3, electric air volume regulating valve; 4, standby valve; 5, centrifugal fan; 6, detection box; 7, lengthened conveying pipe; 8, partition wall type heat exchanger; 9, air outlet pipeline; 10, air outlet valve; 11, temperature induction switch; 12, display; 13, indicator light; 14, alarm; 15, pressure detector; 16, heat preservation sleeve; 17, reinforcing sleeve; 18, wear-resistant inner tube. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0030] The present embodiment can extract the high-temperature flue gas of the exhaust gas pipeline to the air supply pipeline under the action of the centrifugal fan, and then deliver it to the partition wall type heat exchanger at the heat utilization site along the air supply pipeline for waste heat recovery, and then the flue gas after heat exchange can be returned to the exhaust gas pipeline through the air outlet pipeline for discharge, thereby improving the delivery efficiency of the high-temperature flue gas, making it reach the designated site for heat exchange as soon as possible, reducing the heat dissipation generated by the delivery of the high-temperature flue gas, and further improving the heat exchange effect and practicability of the device. The specific embodiments are as follows:

[0031] As Figs. 1 to 4As shown, a high-temperature flue gas waste heat utilization device, including exhaust pipe 1, air supply pipe 2, centrifugal fan 5 and partition heat exchanger 8, exhaust pipe 1 is arranged at the top of the kiln smoke outlet, one end of the bottom is connected with air supply pipe 2, the end of air supply pipe 2 close to exhaust pipe 1 is provided with centrifugal fan 5, the end of air supply pipe 2 away from exhaust pipe 1 is connected with partition heat exchanger 8 through the lengthening conveying pipe 7, partition heat exchanger 8 is arranged at the position beside the heat using point, the exhaust port of partition heat exchanger 8 is connected with air outlet pipe 9, air outlet pipe 9 is connected with the top of exhaust pipe 1. The device is connected on the exhaust pipe 1 of the kiln, under the action of centrifugal fan 5, the high-temperature flue gas of exhaust pipe 1 can be extracted to air supply pipe 2, and then transported to the partition heat exchanger 8 of the heat using point along air supply pipe 2 for waste heat recovery, and then the flue gas after heat exchange is completed can be returned to exhaust pipe 1 through air outlet pipe 9 for discharge, which improves the conveying efficiency of high-temperature flue gas, so that the high-temperature flue gas can reach the designated position for heat exchange as soon as possible, reduces the heat dissipation generated by high-temperature flue gas conveying, and further improves the heat exchange effect and practicability of the device.

[0032] The electric air volume regulating valve 3 is installed on the air supply pipe 2 between the centrifugal fan 5 and the exhaust pipe 1, the air outlet valve 10 is installed on the air outlet pipe 9, and the control valve is installed in the middle of the exhaust pipe 1. Through the electric air volume regulating valve 3, the air supply pipe 2 can be controlled, through the air outlet valve 10, the air outlet valve 10 can be opened when discharging flue gas, and through the control valve, the exhaust pipe 1 can be controlled, and when it is necessary to recover high-temperature flue gas, the exhaust pipe 1 is closed, so that the high-temperature flue gas enters the air supply pipe 2.

[0033] The temperature sensing switch 11 is installed at the connection between the air supply pipe 2 and the exhaust pipe 1, and the detection end of the temperature sensing switch 11 is arranged in the inside of the connection between the air supply pipe 2 and the exhaust pipe 1. Through the temperature sensing switch 11 arranged at the connection between the air supply pipe 2 and the exhaust pipe 1, the temperature in the exhaust pipe 1 can be controlled, and when the temperature is too low, the electric air volume regulating valve 3 can be controlled to close the air supply pipe 2, so that the low-temperature flue gas passes through the air supply pipe 2 to the partition heat exchanger 8, thereby affecting the waste heat recovery.

[0034] The temperature sensing switch 11 is connected with the electric air volume regulating valve 3, and the standby valve 4 is installed at the position beside the electric air volume regulating valve 3. Through the standby valve 4, the electric air volume regulating valve 3 can be used when it is abnormal.

[0035] The detection box 6 is installed on the air supply pipeline 2, and a safety detection assembly is installed on the detection box 6, which comprises an alarm 14 and a pressure detector 15. The pressure detector 15 is installed in the detection box 6 and connected with the inner wall of the air supply pipeline 2, and the alarm 14 is installed on the top of the detection box 6 and electrically connected with the pressure detector 15. Through the safety detection assembly, the internal air pressure of the air supply pipeline 2 can be monitored by the pressure detector 15, and the alarm 14 can be controlled to issue an alarm when the pressure is abnormal, reminding the staff to handle it in time.

[0036] A display 12 and an indicator light 13 are installed on the front of the detection box 6. The display 12 is connected with the pressure detector 15, and the indicator light 13 is connected with the temperature sensing switch 11. Through the display 12, the monitoring data of the pressure detector 15 can be displayed, and through the indicator light 13, it can be turned on when the temperature sensing switch 11 detects that the flue gas temperature is low, thereby reminding the staff.

[0037] A reinforcing sleeve 17 is arranged outside the air supply pipeline 2 and the lengthened conveying pipe 7. The outer wall of the reinforcing sleeve 17 is provided with a heat preservation sleeve 16, and the material of the heat preservation sleeve 16 is heat preservation cotton. By arranging the heat preservation sleeve 16 outside the air supply pipeline 2, the pipeline heat preservation capacity can be improved, and the heat loss can be reduced. By arranging the reinforcing sleeve 17 outside the air supply pipeline 2, the pipeline strength can be improved, so that it is not easy to be damaged.

[0038] A wear-resistant inner tube 18 is arranged on the inner wall of the air supply pipeline 2 and the lengthened conveying pipe 7. Through the wear-resistant inner tube 18, the wear resistance of the pipeline interior can be improved, and the wear caused by flue gas scouring can be reduced.

[0039] The lengthened conveying pipe 7 is connected with the air supply pipeline 2 and the partition wall type heat exchanger 8 through flanges, and sealing rings are arranged at the connection positions. The lengthened conveying pipe 7 can control the length as needed, is easy to install and disassemble, and is convenient for improving the stability of the pipeline connection.

[0040] The partition wall type heat exchanger 8 adopts finned tube heat dissipation, and the base pipe of the finned tube is made of stainless steel, so that the partition wall type heat exchanger 8 will not be corroded by flue gas. The fins are made of copper fins to increase the heat exchange area and the thermal conductivity.

[0041] Working principle: the device is connected to the kiln exhaust pipe, under the action of centrifugal fan, the high temperature flue gas in the exhaust pipe can be extracted to the air supply pipe, and then transported to the partition wall heat exchanger at the heat supply point for waste heat recovery, after the heat exchange is completed, the flue gas can be returned to the exhaust pipe through the air outlet pipe, which improves the conveying efficiency of high temperature flue gas, so that it can reach the designated location for heat exchange as soon as possible, reduces the heat loss generated by high temperature flue gas conveying, further improves the heat exchange effect and practicability of the device, the temperature sensing switch arranged at the connection between the air supply pipe and the exhaust pipe can monitor the temperature inside the exhaust pipe, when the temperature is too low, the electric air volume regulating valve can be closed to avoid the low temperature flue gas passing through the air supply pipe to the partition wall heat exchanger, so as to affect the waste heat recovery, the heat preservation sleeve arranged outside the air supply pipe can improve the pipe heat preservation capacity and reduce the heat loss, the reinforcing sleeve arranged outside the air supply pipe can improve the pipe strength and prevent the pipe from being damaged.

[0042] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-temperature flue gas waste heat utilization device, characterized by, It includes exhaust pipe (1), air supply pipe (2), centrifugal fan (5) and partition heat exchanger (8), exhaust pipe (1) is arranged at the top of the kiln, one end of the bottom is connected with air supply pipe (2), the one end of air supply pipe (2) close to exhaust pipe (1) is provided with centrifugal fan (5), the one end of air supply pipe (2) away from exhaust pipe (1) is connected with partition heat exchanger (8) through lengthening conveying pipe (7), partition heat exchanger (8) is arranged at the position beside the heat using point, the exhaust port of partition heat exchanger (8) is connected with air outlet pipe (9), air outlet pipe (9) is connected with the top of exhaust pipe (1).

2. The high-temperature flue gas waste heat utilization device according to claim 1, characterized in that, Electric air volume regulating valve (3) is installed on air supply pipe (2) between centrifugal fan (5) and exhaust pipe (1), air outlet valve (10) is installed on air outlet pipe (9), control valve is installed in the middle of exhaust pipe (1).

3. The high-temperature flue gas waste heat utilization device according to claim 2, characterized in that, Temperature sensing switch (11) is installed at the connection of air supply pipe (2) and exhaust pipe (1), the detection end of temperature sensing switch (11) is arranged in the inside of the connection of air supply pipe (2) and exhaust pipe (1).

4. The high-temperature flue gas waste heat utilization device according to claim 3, characterized in that, Temperature sensing switch (11) is connected with electric air volume regulating valve (3), standby valve (4) is installed at the position beside electric air volume regulating valve (3).

5. The high-temperature flue gas waste heat utilization device according to claim 3, characterized in that, Detection box (6) is installed on air supply pipe (2), safety detection assembly is installed on detection box (6), safety detection assembly includes alarm (14) and pressure detector (15), pressure detector (15) is installed in detection box (6) and the detection end is connected with the inner wall of air supply pipe (2), alarm (14) is installed on the top of detection box (6), alarm (14) is electrically connected with pressure detector (15).

6. The high-temperature flue gas waste heat utilization device according to claim 5, characterized in that, Display (12) and indicating lamp (13) are installed on the front of detection box (6), display (12) is connected with pressure detector (15), indicating lamp (13) is connected with temperature sensing switch (11).

7. The high-temperature flue gas waste heat utilization device according to claim 1, characterized in that, Reinforced sleeve (17) is arranged outside air supply pipe (2) and lengthening conveying pipe (7), heat preservation sleeve (16) is arranged on the outer wall of reinforced sleeve (17), the material of heat preservation sleeve (16) is heat preservation cotton.

8. The high-temperature flue gas waste heat utilization device according to claim 1, characterized in that, Wear-resistant inner tube (18) is arranged on the inner wall of air supply pipe (2) and lengthening conveying pipe (7).

9. The high-temperature flue gas waste heat utilization device according to claim 8, characterized in that, Lengthening conveying pipe (7) is connected with air supply pipe (2) and partition heat exchanger (8) through flange, and sealing ring is arranged at the connection.

10. The high-temperature flue gas waste heat utilization device according to claim 1, characterized in that, Finned tube is used for heat dissipation of partition heat exchanger (8), the material of finned tube base pipe is stainless steel.

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