Desuperheating water position adjusting device for waste incineration waste heat boiler

Abstract

The utility model discloses a waste incineration waste heat boiler desuperheating water position adjusting device, and relates to the technical field of waste incineration waste heat boiler desuperheating water position adjusting. A gate valve and a tee joint are connected into a superheater connecting pipe for connecting a low-temperature superheater I, a medium-temperature superheater I and a medium-temperature superheater II. The flow direction of steam in the pipeline is adjusted through opening and closing of the gate valve, so that the access position of the attemperation water is adjusted, and the position of the attemperation water is adjusted from the original position between the low-temperature superheater I and the medium-temperature superheater I to the position between the medium-temperature superheater I and the medium-temperature superheater II. After the steam superheat device is adopted, the steam superheat degree of the outlet of the medium-temperature superheater I is improved compared with that of the outlet of the low-temperature superheater I, and the problem that the steam superheat degree is not enough when the desuperheating water amount at the outlet position of the low-temperature superheater I is too large is effectively solved. And meanwhile, the medium-temperature superheater I is reduced behind the desuperheater, and the steam is not easy to overheat at the outlet of the medium-temperature superheater II, so that the adjusting efficiency of the boiler is improved, and the safe operation of the boiler is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of desuperheating water position adjustment technology in waste incineration waste heat boilers, and in particular to a device for adjusting the position of desuperheating water in waste incineration waste heat boilers. Background Technology

[0002] like Figure 1 As shown, the typical desuperheating water piping arrangement of existing waste incineration waste heat boilers includes a low-temperature superheater I14, a medium-temperature superheater I15, and a medium-temperature superheater II16. The low-temperature superheater I is connected sequentially to the low-temperature superheater I outlet header 10, the medium-temperature superheater I inlet header 11, and the medium-temperature superheater I via superheater connecting pipe 8. The desuperheater 17 and temperature measuring point 7 are installed on the superheater connecting pipe between the low-temperature superheater I outlet header and the medium-temperature superheater I inlet header. The medium-temperature superheater I is connected sequentially to the medium-temperature superheater I outlet header 12, the medium-temperature superheater II inlet header 13, and the medium-temperature superheater II via superheater connecting pipe.

[0003] This waste incineration waste heat boiler uses a desuperheater between the low-temperature and medium-temperature superheaters to regulate the temperature of the superheated steam. However, due to the harsh working environment of the waste incineration waste heat boiler, prolonged operation can lead to ash and coking on the front-end water-cooled walls, severely affecting heat exchange efficiency, resulting in reduced evaporation and a surge in heat exchange in the superheater components. In this situation, it is difficult to accurately adjust the desuperheating water flow. Insufficient desuperheating water will cause the superheater outlet medium temperature to exceed the limit, while excessive desuperheating water will result in insufficient superheating of the steam at the superheater inlet, posing a threat to the safe operation of the boiler. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model designs a desuperheating water position adjustment device for a waste incineration waste heat boiler. This device optimizes the desuperheating effect by adjusting the inlet position of the desuperheating water.

[0005] The present invention adopts the following technical solution:

[0006] A desuperheating water position adjustment device for a waste incineration waste heat boiler includes a low-temperature superheater I, a medium-temperature superheater I, and a medium-temperature superheater II. The low-temperature superheater I is sequentially connected to the outlet header of the low-temperature superheater I, the inlet header of the medium-temperature superheater I, and the medium-temperature superheater II via superheater connecting pipes. A desuperheater is installed on the superheater connecting pipe between the outlet header of the low-temperature superheater I and the inlet header of the medium-temperature superheater I. The medium-temperature superheater I is sequentially connected to the outlet header of the medium-temperature superheater I, the inlet header of the medium-temperature superheater II, and the medium-temperature superheater II via superheater connecting pipes. The device is also installed on the superheater connecting pipe between the outlet header of the low-temperature superheater I and the desuperheater II. Valve 6 and tee 1 are installed sequentially along the fluid direction. Tee 2 and valve 4 are installed sequentially along the fluid direction on the superheater connecting pipe between the desuperheater and the inlet header of medium-temperature superheater I. Tee 3, valve 1 and tee 4 are installed sequentially along the fluid direction on the superheater connecting pipe between the outlet header of medium-temperature superheater I and the inlet header of medium-temperature superheater II. Tee 1 and tee 3 are connected by the superheater connecting pipe and valve 3 is installed. Tee 2 and tee 4 are connected by the superheater connecting pipe and valve 2 is installed. The outlet header of low-temperature superheater I and the inlet header of medium-temperature superheater I are connected by the superheater connecting pipe and valve 5 is installed.

[0007] By switching the switches of valves 1, 4, and 6 with valves 2, 3, and 5, the position of the desuperheater is switched, allowing it to switch between the low-temperature superheater I and the medium-temperature superheater I, and between the medium-temperature superheater I and the medium-temperature superheater II.

[0008] Preferably, valves one, two, three, four, five, and six are gate valves.

[0009] Preferably, valve 1, valve 2, valve 3, valve 4, valve 5, and valve 6 are all electrically controlled valves.

[0010] Preferably, a temperature measuring point is installed on the superheater connecting pipe between the desuperheater and the three-way valve.

[0011] The beneficial effects of this invention are as follows: This invention incorporates a gate valve and a tee in the superheater connecting pipes of the low-temperature superheater I, medium-temperature superheater I, and medium-temperature superheater II. The steam flow direction within the pipes is adjusted by opening and closing the gate valve, thereby adjusting the inlet position of the desuperheating water. The desuperheating water is shifted from the original location between the low-temperature superheater I and the medium-temperature superheater I to the location between the medium-temperature superheater I and the medium-temperature superheater II. With this invention, the steam superheat at the outlet of the medium-temperature superheater I is higher than that at the outlet of the low-temperature superheater I, effectively avoiding the problem of insufficient steam superheat when the desuperheating water flow is too large at the outlet of the low-temperature superheater I. The reduction of the distance between the medium-temperature superheater I and the desuperheater also reduces the likelihood of overheating at the outlet of the medium-temperature superheater II. This improves the boiler's regulation efficiency and ensures safe boiler operation. Attached Figure Description

[0012] Figure 1 Schematic diagram of existing cooling water pipeline layout

[0013] Figure 2 : Schematic diagram of the desuperheating water arrangement using the desuperheating water position adjustment device of this utility model

[0014] 1. Gate Valve 1; 2. Gate Valve 2; 3. Gate Valve 3; 4. Gate Valve 4; 5. Gate Valve 5; 6. Gate Valve 6; 7. Temperature measuring point; 8. Superheater connecting pipe; 9. T-junction 1; 10. Low-temperature superheater I outlet header; 11. Medium-temperature superheater I inlet header; 12. Medium-temperature superheater I outlet header; 13. Medium-temperature superheater II inlet header; 14. Low-temperature superheater I; 15. Medium-temperature superheater I; 16. Medium-temperature superheater II; 17. Desuperheater; 18. T-junction 2; 19. T-junction 3; 20. T-junction 4. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0016] Example: Figure 2 As shown, a desuperheating water position adjustment device for a waste incineration waste heat boiler includes a low-temperature superheater I14, a medium-temperature superheater I15, and a medium-temperature superheater II16. The low-temperature superheater I is connected in sequence to the outlet header 10 of the low-temperature superheater I, the inlet header 11 of the medium-temperature superheater I, and the medium-temperature superheater I via a superheater connecting pipe 8. A desuperheater I17 is installed on the superheater connecting pipe between the outlet header of the low-temperature superheater I and the inlet header of the medium-temperature superheater I. The medium-temperature superheater I is connected in sequence to the outlet header 12 of the medium-temperature superheater I, the inlet header 13 of the medium-temperature superheater II, and the medium-temperature superheater II via a superheater connecting pipe. The superheater I1 is connected to the superheater between the outlet header of the low-temperature superheater I and the desuperheater II. Gate valve 6 and tee 1 9 are installed sequentially along the fluid direction on the connecting pipe. Tee 2 18 and gate valve 4 are installed sequentially along the fluid direction on the superheater connecting pipe between the desuperheater and the inlet header of medium-temperature superheater I. Tee 3 19, gate valve 1 2 and tee 4 20 are installed sequentially along the fluid direction on the superheater connecting pipe between the outlet header of medium-temperature superheater I and the inlet header of medium-temperature superheater II. Tee 1 and Tee 3 are connected by the superheater connecting pipe and are equipped with gate valve 3. Tee 2 and Tee 4 are connected by the superheater connecting pipe and are equipped with gate valve 2. The outlet header of low-temperature superheater I and the inlet header of medium-temperature superheater I are connected by the superheater connecting pipe and are equipped with gate valve 5.

[0017] By switching the switches of gate valves 1, 4, and 6 with gate valves 2, 3, and 5, the desuperheater position is switched, allowing it to switch between the low-temperature superheater I and the medium-temperature superheater I, and between the medium-temperature superheater I and the medium-temperature superheater II.

[0018] Temperature measuring point 7 is installed on the superheater connecting pipe between the desuperheater and the three-way valve.

[0019] This invention incorporates a gate valve and a tee in the superheater connecting pipe. The gate valve's opening and closing adjusts the steam flow direction within the pipe, thereby adjusting the desuperheating water inlet position. The desuperheating water is shifted from between the original low-temperature superheater I and medium-temperature superheater I to between medium-temperature superheater I and medium-temperature superheater II. With this invention, the steam superheat at the outlet of medium-temperature superheater I is higher than that at the outlet of low-temperature superheater I, effectively avoiding the problem of insufficient steam superheat when the desuperheating water flow is too large at the outlet of low-temperature superheater I. The reduction of medium-temperature superheater I downstream of the desuperheater also reduces the likelihood of steam overheating at the outlet of medium-temperature superheater II. This improves the boiler's regulation efficiency and ensures safe boiler operation.

[0020] In the initial state of use, gate valve 1, gate valve 4, and gate valve 6 are open, while gate valve 2, gate valve 3, and gate valve 5 are closed. At this time, the desuperheater is arranged between the low-temperature superheater I and the medium-temperature superheater I, which is consistent with the conventional arrangement.

[0021] Adjustment status: When the heat exchange conditions of the superheater deteriorate, open gate valve 2, gate valve 3, and gate valve 5, and close gate valve 1, gate valve 4, and gate valve 6. Valve operation follows the principle of opening before closing. At this time, the desuperheater is adjusted from its original position between the low-temperature superheater I and the medium-temperature superheater I to between the medium-temperature superheater I and the medium-temperature superheater II.

[0022] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A desuperheating water position adjustment device for a waste incineration waste heat boiler, comprising a low-temperature superheater I, a medium-temperature superheater I, and a medium-temperature superheater II. The low-temperature superheater I is sequentially connected to the outlet header of the low-temperature superheater I, the inlet header of the medium-temperature superheater I, and the medium-temperature superheater II via superheater connecting pipes. A desuperheater is installed on the superheater connecting pipe between the outlet header of the low-temperature superheater I and the inlet header of the medium-temperature superheater I. The medium-temperature superheater I is sequentially connected to the outlet header of the medium-temperature superheater I, the inlet header of the medium-temperature superheater II, and the medium-temperature superheater II via superheater connecting pipes. The device is characterized in that... Valves 6 and tee 1 are installed sequentially along the fluid direction on the superheater connecting pipe between the outlet header of the low-temperature superheater I and the desuperheater. Tee 2 and valve 4 are installed sequentially along the fluid direction on the superheater connecting pipe between the desuperheater and the inlet header of the medium-temperature superheater I. Tee 3, valve 1 and tee 4 are installed sequentially along the fluid direction on the superheater connecting pipe between the outlet header of the medium-temperature superheater I and the inlet header of the medium-temperature superheater II. Tee 1 and tee 3 are connected by the superheater connecting pipe and valve 3 is installed. Tee 2 and tee 4 are connected by the superheater connecting pipe and valve 2 is installed. The outlet header of the low-temperature superheater I and the inlet header of the medium-temperature superheater I are connected by the superheater connecting pipe and valve 5 is installed. By switching the switches of valves 1, 4, and 6 with valves 2, 3, and 5, the position of the desuperheater is switched, allowing it to switch between the low-temperature superheater I and the medium-temperature superheater I, and between the medium-temperature superheater I and the medium-temperature superheater II.

2. The waste incineration waste heat boiler desuperheating water position adjustment device according to claim 1, characterized in that, Valve 1, Valve 2, Valve 3, Valve 4, Valve 5, and Valve 6 are all gate valves.

3. The waste incineration waste heat boiler desuperheating water position adjustment device according to claim 1, characterized in that, Valve 1, Valve 2, Valve 3, Valve 4, Valve 5, and Valve 6 are all electrically controlled valves.

4. The device for adjusting the desuperheating water position in a waste incineration waste heat boiler according to claim 1, characterized in that, Temperature measuring points are installed on the superheater connecting pipe between the desuperheater and the three-way valve.

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