Temperature control structure of reheater

Abstract

The utility model relates to a reheater temperature control structure which is used for a boiler, the boiler comprises a boiler body, and the reheater temperature control structure comprises a first reheater fixedly arranged on the inner wall of the boiler body and provided with a first inlet pipe and a first outlet pipe; the second reheater is fixedly arranged on the inner wall of the furnace body and is provided with a second inlet pipe and a second outlet pipe; the temperature sensor is arranged on the first outlet pipe; the three-way valve is provided with a port A, a port B and a port C, the port A is connected with the first outlet pipe, and the port B is connected with the second inlet pipe. When the temperature sensor detects that steam exhausted by the first outlet pipe does not reach the set temperature, the valve element of the three-way valve is controlled to rotate to the first state, the first outlet pipe is communicated with the second inlet pipe, the steam enters the second reheater to be heated again, and the heated steam in the second outlet pipe is collected by the third header and fed into the pressure cylinder to do work. The requirement that steam can enter the pressure cylinder to do work after heat exchange is guaranteed, and the pressure cylinder with different pressure requirements can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of reheaters, in particular to a temperature control structure of a reheater. Background Art

[0002] The reheater is essentially a steam superheater that reheats the low-pressure steam that has done work to a certain temperature. The reheater is fixed on the inner wall of the boiler furnace. When the hot flue gas passes through the furnace, the hot air exchanges heat with the reheater to heat the steam in the reheater. If the flue gas temperature in the boiler is not high enough or the reheater is installed in a low flue gas temperature area, the steam in the reheater will not be able to meet the work requirements of entering the compression cylinder after heat exchange.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] In view of the deficiencies in the prior art, an embodiment of the utility model discloses a reheater temperature control structure to solve the problem of insufficient steam heat exchange effect in the reheater.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A reheater temperature control structure is used for a boiler, and the boiler includes a furnace body. The reheater temperature control structure includes: a first reheater, fixedly arranged on the inner wall of the furnace body, having a first inlet pipe and a first outlet pipe; a second reheater, fixedly arranged on the inner wall of the furnace body, having a second inlet pipe and a second outlet pipe; a temperature sensor, arranged on the first outlet pipe; a three-way valve, having an A port, a B port and a C port, the A port being connected to the first outlet pipe, and the B port being connected to the second inlet pipe; wherein, when the valve core of the three-way valve rotates to a first state, the A port is connected to the B port; and when the valve core of the three-way valve rotates to a second state, the A port is connected to the C port.

[0007] Its further technical solution is that the first reheater includes a first inlet pipe, a first bent pipe and a first outlet pipe connected in sequence; the reheater temperature control structure includes a first header; wherein the first bent pipe is located in the furnace body, the temperature sensor is arranged on the first outlet pipe, the first outlet pipe is connected to the A port, and the first inlet pipe is connected to the first header.

[0008] Its further technical solution is that the second reheater includes a second inlet pipe, a second bent pipe and a second outlet pipe connected in sequence; the reheater temperature control structure includes a third header; wherein the second bent pipe is located within the furnace body, the second outlet pipe is connected to the B port, and the second outlet pipe is connected to the third header.

[0009] A further technical solution is that the reheater temperature control structure includes a second header; wherein the C port is connected to the second header.

[0010] A further technical solution is that the first reheater and the second reheater are fixed in a frame, and the frame is fixed to the inner wall of the furnace.

[0011] A further technical solution is that the first reheater and the second reheater are clamped and fixed in the frame by a plurality of pairs of clamping plates.

[0012] The beneficial effects of the embodiments of the present utility model are as follows:

[0013] (I) The temperature control structure of the reheater of the utility model has two groups of reheaters arranged on the inner wall of the furnace body. When the temperature sensor detects that the steam discharged from the first outlet pipe reaches the set temperature, the valve core of the three-way valve is controlled to rotate to the second state, the first outlet pipe is connected to the second header, and the second header collects the steam heated in the first outlet pipe and sends it to the pressure cylinder to do work. When the temperature sensor detects that the steam discharged from the first outlet pipe does not reach the set temperature, the valve core of the three-way valve is controlled to rotate to the first state, the first outlet pipe is connected to the second inlet pipe, the steam enters the second reheater to be heated again, and the third header collects the steam heated in the second outlet pipe and sends it to the pressure cylinder to do work, ensuring that the steam can meet the demand of entering the pressure cylinder to do work after heat exchange, and can adapt to the pressure cylinders with different pressure requirements.

[0014] (ii) Furthermore, the first bent tube of the first reheater and the second bent tube of the second reheater are clamped and fixed to the frame in the frame by a plurality of pairs of clamping plates, which have high fixing strength and are easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the reheater temperature control structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the frame and the clamping plate in the reheater temperature control structure of the utility model.

[0017] In the figure:

[0018] 1. First reheater; 11. First inlet pipe; 12. First bent pipe; 13. First outlet pipe; 2. Second reheater; 21. Second inlet pipe; 22. Second bent pipe; 23. Second outlet pipe; 3. First header; 4. Second header; 5. Third header; 6. Temperature sensor; 7. Three-way valve; 8. Frame; 81. Cross bar; 9. Clamp; 91. Vertical plate; 92. Curved plate; 10. Furnace body. DETAILED DESCRIPTION

[0019] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0020] In order to make the purpose, technical scheme and advantages of the utility model clearer, the device proposed in the utility model is further described in detail below in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so it has no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0021] Example:

[0022] This embodiment discloses a reheater temperature control structure.

[0023] Figure 1 FIG. 1 is a schematic diagram of the structure of the reheater temperature control structure of the utility model. Figure 1 As shown, the reheater temperature control structure is used for a boiler, and the boiler includes a furnace body 10. The reheater temperature control structure includes a first reheater 1, a second reheater 2, a temperature sensor 6 and a three-way valve 7. The first reheater 1 is fixedly arranged on the inner wall of the furnace body 10, and has a first inlet pipe 11 and a first outlet pipe 13. The second reheater 2 is fixedly arranged on the inner wall of the furnace body 10, and has a second inlet pipe 21 and a second outlet pipe 23. The temperature sensor 6 is arranged on the first outlet pipe 13. The three-way valve 7 has a port A, a port B and a port C, wherein the port A is connected to the first outlet pipe 13, and the port B is connected to the second inlet pipe 21. Among them, when the valve core of the three-way valve 7 rotates to the first state, the port A is connected to the port B. When the valve core of the three-way valve 7 rotates to the second state, the port A is connected to the port C.

[0024] Exemplarily, the first reheater 1 includes a first inlet pipe 11, a first bent pipe 12 and a first outlet pipe 13 connected in sequence, and the reheater temperature control structure includes a first header 3. Among them, the first bent pipe 12 is located in the furnace body 10, the temperature sensor 6 is arranged on the first outlet pipe 13, and the first outlet pipe 13 is connected to the A port. The first reheater 1 is arranged in multiple groups side by side, and multiple first inlet pipes 11 are connected to the first header 3, and the first header 3 distributes the steam after work in the compression cylinder to each first inlet pipe 11.

[0025] The second reheater 2 is located at the lower end of the first reheater 1. The second reheater 2 includes a second inlet pipe 21, a second bent pipe 22, and a second outlet pipe 23 connected in sequence, and the reheater temperature control structure includes a third header 5. Among them, the second bent pipe 22 is located in the furnace body 10, and the second inlet pipe 21 is connected to the B port. Multiple groups of second reheaters 2 are arranged side by side, and multiple second outlet pipes 23 are connected to the third header 5. The third header 5 collects the steam heated in the second outlet pipe 23 and sends it to the pressure cylinder to do work.

[0026] The reheater temperature control structure includes a second header 4. Among them, the C port is connected to the second header 4, and the second header 4 collects the steam heated in the first outlet pipe 13 and sends it to the compression cylinder to do work.

[0027] Figure 2 Schematic diagram of the structure of the frame and the clamping plate in the reheater temperature control structure of the utility model. Figure 2 As shown, further, the first reheater 1 and the second reheater 2 are fixed in the frame 8, and the frame 8 is fixed to the inner wall of the furnace body 10. Exemplarily, the first bent tube 12 of the first reheater 1 and the second bent tube 22 of the second reheater 2 are clamped and fixed on the crossbar 81 in the frame 8 by a plurality of pairs of clamps 9. Specifically, the clamps 9 include alternately connected vertical plates 91 and arc plates 92, and the arc portions of the two clamps 9 are assembled into a cavity for accommodating the tube body. The inner side of the upper end of the frame 8 and the inner side of the lower end of the frame 8 are provided with a crossbar 81, and the upper end and the lower end of each group of clamps 9 are respectively fixed to the crossbar 81 by screws.

[0028] In this embodiment, two groups of reheaters are arranged on the inner wall of the furnace body 10. When the temperature sensor 6 detects that the steam discharged from the first outlet pipe 13 reaches the set temperature, the valve core of the three-way valve 7 is controlled to rotate to the second state, and the first outlet pipe 13 is connected to the second header 4. The second header 4 collects the steam heated in the first outlet pipe 13 and sends it to the pressure cylinder to do work. When the temperature sensor 6 detects that the steam discharged from the first outlet pipe 13 does not reach the set temperature, the valve core of the three-way valve 7 is controlled to rotate to the first state, the first outlet pipe 13 is connected to the second inlet pipe 21, the steam enters the second reheater 2 to be heated again, and the third header 5 collects the steam heated in the second outlet pipe 23 and sends it to the pressure cylinder to do work, ensuring that the steam can meet the demand of entering the pressure cylinder to do work after heat exchange.

[0029] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A reheater temperature control structure, characterized in that: Used for a boiler, the boiler comprises a furnace body, and the reheater temperature control structure comprises: A first reheater, fixedly disposed on the inner wall of the furnace body, having a first inlet pipe and a first outlet pipe; A second reheater is fixedly arranged on the inner wall of the furnace body and has a second inlet pipe and a second outlet pipe; A temperature sensor is arranged on the first outlet pipe; A three-way valve having an A port, a B port and a C port, wherein the A port is connected to the first outlet pipe, and the B port is connected to the second inlet pipe; When the valve core of the three-way valve rotates to the first state, the A port is connected to the B port; when the valve core of the three-way valve rotates to the second state, the A port is connected to the C port.

2. A reheater temperature control structure according to claim 1, characterized in that: The first reheater comprises a first inlet pipe, a first bent pipe and a first outlet pipe connected in sequence; the reheater temperature control structure comprises a first header; Wherein, the first bent pipe is located in the furnace body, the temperature sensor is arranged on the first outlet pipe, the first outlet pipe is connected to the A port, and the first inlet pipe is connected to the first header.

3. A reheater temperature control structure according to claim 2, characterized in that: The second reheater comprises a second inlet pipe, a second bent pipe and a second outlet pipe connected in sequence; the reheater temperature control structure comprises a third header; Wherein, the second bent pipe is located in the furnace body, the second inlet pipe is connected to the B port, and the second outlet pipe is connected to the third header.

4. A reheater temperature control structure according to claim 1 or 2, characterized in that: The reheater temperature control structure includes a second header; Wherein, the C port is connected to the second header.

5. A reheater temperature control structure according to claim 1, characterized in that: The first reheater and the second reheater are fixed in a frame, and the frame is fixed to the inner wall of the furnace.

6. A reheater temperature control structure according to claim 5, characterized in that: The first reheater and the second reheater are clamped and fixed in the frame by a plurality of pairs of clamping plates.

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