Feeding chute heating system

Abstract

The utility model discloses a feeding chute heating system which comprises a water supplementing tank, a feeding chute, a pipeline, a valve, a primary air pre-heater, a steam trap and the like. The system is connected with a valve through a reasonable pipeline, and the chute jacket is heated in winter by utilizing drainage waste heat of the air pre-heater. Before starting, water needs to be discharged, relevant valves need to be closed, the monitoring temperature is 80-90 DEG C in the operation process, and the water temperature is adjusted through the valves. Compared with the prior art, the system can efficiently utilize energy, improve production efficiency and reduce equipment loss, and particularly, the system utilizes waste heat to improve boiler heat efficiency, prevents low-temperature garbage from influencing combustion, enables the garbage to absorb heat in the chute, guarantees hearth temperature and the like.

Description

Technical Field

[0001] The utility model relates to the field of preheating before waste incineration, and specifically relates to a feeding chute heating system. Background Art

[0002] In industrial production, especially in the field related to boiler operation, the temperature control of the feeding chute is crucial. The traditional feeding chute water replenishing device usually introduces industrial water into the water-cooled jacket, and uses the water to absorb heat when the boiler starts to cool the feeding chute to prevent it from overheating and ensure the normal start of the equipment. This cooling mechanism ensures the normal operation of the feeding chute in a high-temperature environment to a certain extent, effectively preventing equipment failures that may be caused by overheating, and providing a solid guarantee for the normal start of the equipment. However, in many industrial projects in the north, due to the cold winter climate and extremely low external environmental temperature, the temperature of the feeding chute during boiler operation often only maintains at a low level of about 20°C. Such an abnormal low temperature condition is likely to have many adverse effects on the material transportation and subsequent processing links. For example, it may cause the material to have poor fluidity, increasing the resistance and energy consumption during transportation; or due to the low temperature, the material may condense and agglomerate during the processing, seriously affecting production efficiency and product quality. Content of the Utility Model

[0003] The purpose of the utility model is to provide a feeding chute heating system, which adds a way of water replenishment and uses the waste heat of the air preheater drain to heat the chute jacket during the boiler operation when the winter temperature is relatively low, so as to play a role in preheating the waste in the chute in advance.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A feeding chute heating system includes a water replenishing tank, a feeding chute, several pipes and valves, and is characterized by further including a primary air preheater, a steam trap, and a solenoid valve; the water inlet of the water replenishing tank is connected to the industrial water replenishing port through a pipe, a solenoid valve is installed in the pipe, and a bypass pipe is connected in parallel beside the solenoid valve, and an industrial water to chute water replenishing bypass manual valve is installed in the bypass pipe;

[0006] The low-pressure side of the primary air preheater is connected to the steam trap through a pipe, the steam trap is connected to the water inlet end at the bottom of the feeding chute through a pipe, and a bypass pipe is connected in parallel beside the steam trap, and a steam trap bypass manual valve is installed in the bypass pipe;

[0007] The water outlet of the water replenishing tank is merged into the pipe connecting the steam trap to the water inlet end at the bottom of the feeding chute through a pipe;

[0008] Both the supplementary water tank and the feeding chute are provided with overflow pipes at the top, and the two overflow pipes are merged and connected to the boiler's 0-meter regular blowdown header pipe.

[0009] Manual valves for feeding industrial water to the chute before and after water replenishment are respectively installed on the pipes on both sides of the solenoid valve.

[0010] Manual valves before and after the steam trap are respectively installed on the pipes on both sides of the steam trap.

[0011] The outlet of the supplementary water tank is merged through a pipe to the merging point of the pipe connecting the steam trap to the bottom water inlet of the feeding chute. A manual valve from the supplementary water tank to the chute is installed in the pipe connecting to the supplementary water tank, and a manual valve for low-pressure side condensate drainage of the primary air air preheater to the chute for water replenishment is installed in the pipe connecting to the steam trap.

[0012] A feeding chute water inlet valve is installed on the pipe connecting to the bottom water inlet end of the feeding chute.

[0013] A drain port is provided at the bottom of the feeding chute. The drain port is connected to the drainage pond through a pipe, and a chute drain valve is installed on the pipe.

[0014] Before the system starts, first open the drain valve to drain the original cold water in the feeding chute, and then close it after draining. Then close the manual valve from the supplementary water tank to the chute to prevent industrial water from entering. Then open the manual valve for low-pressure side condensate drainage of the air preheater to the feeding chute for water replenishment, the manual valve before the steam trap, the manual valve after the steam trap, and the feeding chute water inlet valve. During the operation of the system, closely monitor the temperature of the feeding chute to keep it between 80 - 90 °C. Control the hot water flow rate and temperature by adjusting the opening degrees of valves such as the manual valve for low-pressure side condensate drainage of the air preheater to the feeding chute for water replenishment and the feeding chute water inlet valve. In addition, connect the original overflow header pipe of the feeding chute to the boiler's 0-meter regular blowdown header pipe to recover the condensate, and at the same time add a 100-mm-thick thermal insulation material on the outer layer of the feeding chute to reduce heat loss. If the temperature of the feeding chute is lower than 80 °C, appropriately increase the opening degree of the manual valve for low-pressure side condensate drainage of the air preheater to the feeding chute for water replenishment to increase the hot water supply; if the temperature exceeds 90 °C, reduce the opening degree. Through continuous adjustment, ensure the stable operation of the system and achieve the effect of heating the garbage in the feeding chute.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] Efficient energy utilization: Make full use of the waste heat of the air preheater condensate to heat the feeding chute, use the waste heat of the low-pressure air preheater condensate to increase the chute temperature, reduce waste heat waste, and increase the thermal efficiency of the boiler. Compared with the traditional method that only relies on external energy for heating, it greatly improves the energy utilization efficiency, reduces energy consumption and costs.

[0017] Improve production efficiency: In the low-temperature environment in winter, heating the garbage in the feeding chute in advance can prevent low-temperature garbage from directly entering the furnace, affecting combustion adjustment. The temperature is maintained at 80 - 90 °C, which can effectively avoid problems such as unsmooth material transportation or blockage caused by too low temperature of the feeding chute, ensuring the continuity and stability of the production process, and thus improving the overall production efficiency.

[0018] Reduce equipment wear: Precise temperature control and effective heating methods enable the garbage to absorb heat in the chute, reducing the heat absorption of the garbage in the furnace and ensuring the furnace temperature. This reduces the damage to the equipment caused by temperature fluctuations, extends the service life of equipment such as the feeding chute, and reduces the equipment maintenance cost. Brief description of the drawings

[0019] Figure 1 It is a connection diagram of a feeding chute heating system of the present utility model;

[0020] In the figure: 1. Manual valve before the steam trap; 2. Manual valve after the steam trap; 3. Manual bypass valve of the steam trap; 4. Manual valve for the low-pressure side of the primary air air preheater to drain water to the feeding chute for water replenishment; 5. Manual valve before the industrial water to the feeding chute for water replenishment; 6. Solenoid valve; 7. Manual valve after the industrial water to the feeding chute for water replenishment; 8. Manual bypass valve of the industrial water to the feeding chute for water replenishment; 9. Manual valve from the water replenishment tank to the feeding chute; 10. Inlet valve of the feeding chute; 11. Drain valve of the feeding chute; 12. Steam trap; A. Industrial water replenishment; B. Drain water from the low-pressure side of the air preheater; C. Boiler 0-meter regular drainage main pipe; D. Water replenishment tank; E. Feeding chute; F. Overflow water level. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be fully described in conjunction with the drawings in the embodiments of the present utility model.

[0022] As shown in the figure, a feeding chute heating system includes a water replenishment tank, a feeding chute, several pipelines and valves, and is characterized in that it further includes a primary air air preheater, a steam trap 12, and a solenoid valve 6; the water inlet of the water replenishment tank is connected to the industrial water replenishment port through a pipeline, a solenoid valve 6 is installed in the pipeline, and a bypass pipeline is connected in parallel beside the solenoid valve 6, and a manual bypass valve 8 for industrial water to the feeding chute for water replenishment is installed in the bypass pipeline;

[0023] The low-pressure side of the primary air air preheater is connected to the steam trap 12 through a pipeline, the steam trap 12 is connected to the water inlet end at the bottom of the feeding chute through a pipeline, and a bypass pipeline is connected in parallel beside the steam trap 12, and a manual bypass valve 3 of the steam trap is installed in the bypass pipeline;

[0024] The water outlet of the water replenishment tank is merged into the pipeline where the steam trap 12 is connected to the water inlet end at the bottom of the feeding chute through a pipeline;

[0025] Both the make-up water tank and the feeding chute are provided with overflow pipes at the top, and the two overflow pipes are merged and connected to the boiler 0-meter regular blowdown header.

[0026] Manual valves 5 for industrial water to the chute before water replenishment and 7 for industrial water to the chute after water replenishment are respectively installed on the pipes on both sides of the solenoid valve 6.

[0027] Manual valves 1 before the steam trap and 2 after the steam trap are respectively installed on the pipes on both sides of the steam trap 12.

[0028] The outlet of the make-up water tank is merged into the pipe connecting the steam trap 12 to the bottom water inlet of the feeding chute through a pipe. A manual valve 9 from the make-up water tank to the chute is installed in the pipe connecting to the make-up water tank, and a manual valve 4 for low-pressure side condensate drainage of the primary air preheater to the chute for water replenishment is installed in the pipe connecting to the steam trap 12.

[0029] A feeding chute water inlet valve 10 is installed on the pipe connecting to the bottom water inlet end of the feeding chute.

[0030] The bottom of the feeding chute is provided with a drain port, which is connected to the drainage pond through a pipe, and a chute drain valve 11 is installed on the pipe.

[0031] Before the system starts, first open the drain valve 11 to drain the original cold water in the feeding chute, and then close it after draining. Then close the manual valve 9 from the make-up water tank to the chute to prevent industrial water from entering. Then open the manual valve 4 for low-pressure side condensate drainage of the preheater to the feeding chute for water replenishment, the manual valve 1 before the steam trap, the manual valve 2 after the steam trap, and the feeding chute water inlet valve 10. During the operation of the system, closely monitor the temperature of the feeding chute and keep it between 80 - 90 °C. Control the hot water flow rate and temperature by adjusting the opening degrees of valves such as the manual valve 4 for low-pressure side condensate drainage of the preheater to the feeding chute for water replenishment and the feeding chute water inlet valve 10. In addition, connect the original overflow header of the feeding chute to the boiler 0-meter regular blowdown header to recover the condensate, and at the same time add a 100-mm thick thermal insulation material on the outer layer of the feeding chute to reduce heat loss. If the temperature of the feeding chute is lower than 80 °C, appropriately open the manual valve 4 for low-pressure side condensate drainage of the preheater to the feeding chute for water replenishment to increase the hot water supply; if the temperature exceeds 90 °C, then reduce the opening degree. Through continuous adjustment, ensure the stable operation of the system and achieve the effect of heating the garbage in the feeding chute.

Claims

1. A feed chute heating system, comprising a make-up water tank, a feed chute, a plurality of pipes and valves, characterized in that It also includes a primary air preheater, a steam trap (12), and a solenoid valve (6); the water inlet of the make-up water tank is connected to the industrial make-up water port through a pipeline, a solenoid valve (6) is installed in the pipeline, and a bypass pipeline is connected in parallel beside the solenoid valve (6), and an industrial water to chute make-up water bypass manual valve (8) is installed in the bypass pipeline; The low-pressure side of the primary air preheater is connected to the steam trap (12) through a pipeline, the steam trap (12) is connected to the water inlet end at the bottom of the feeding chute through a pipeline, and a bypass pipeline is connected in parallel beside the steam trap (12), and a steam trap bypass manual valve (3) is installed in the bypass pipeline; The water outlet of the make-up water tank is merged into the pipeline where the steam trap (12) is connected to the water inlet end at the bottom of the feeding chute through a pipeline; Both the make-up water tank and the feeding chute are provided with overflow pipelines at the top, and the two overflow pipelines are merged and connected to the boiler regular blowdown header.

2. The feeding chute heating system according to claim 1, wherein: Industrial water to chute make-up water pre-manual valves (5) and industrial water to chute make-up water post-manual valves (7) are respectively installed on the pipelines on both sides of the solenoid valve (6).

3. The feeding chute heating system according to claim 1, characterized in that: A steam trap pre-manual valve (1) and a steam trap post-manual valve (2) are respectively installed on the pipelines on both sides of the steam trap (12).

4. A feeding chute heating system according to claim 1, characterized in that: The water outlet of the make-up water tank is merged into the merging point of the pipeline where the steam trap (12) is connected to the water inlet at the bottom of the feeding chute. A make-up water tank to chute manual valve (9) is installed in the pipeline connected to the make-up water tank, and a primary air preheater low-pressure side steam trap to chute make-up water manual valve (4) is installed in the pipeline connected to the steam trap (12).

5. The feeding chute heating system according to claim 1, wherein: A feeding chute water inlet valve (10) is installed on the pipeline connected to the water inlet end at the bottom of the feeding chute.

6. The feeding chute heating system according to claim 1, wherein: The bottom of the feeding chute is provided with a drain port, and the drain port is connected to a drainage pool through a pipeline, and a chute drain valve (11) is installed on the pipeline.

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