A waste heat recovery heat exchanger for steam power exchange network

Abstract

The invention discloses a waste heat recovery heat exchanger for a steam power exchange network, and relates to the technical field of waste heat recovery. The waste heat recovery heat exchanger comprises a shell, an adjusting device, a heat exchange plate, a refrigerant pipe and a heat medium pipe, the refrigerant pipe and the heat medium pipe are respectively fastened to the shell, the adjusting device is connected to the shell, a cold runner and a hot runner are provided on the shell, the refrigerant pipe is connected to the cold runner pipeline, the heat medium pipe is connected to the hot runner pipeline, a plurality of heat exchange grooves are provided on the shell, the heat exchange plate is placed in the heat exchange groove, the two ends of the heat exchange plate are respectively inserted into the cold runner and the hot runner, the hot runner and the cold runner are arranged in a serpentine shape, and the adjusting device is used to adjust the local circulation flow of the heat medium in the hot runner.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, in particular to a waste heat recovery heat exchanger for a steam power exchange network. Background Art

[0002] With the continuous development of science and technology, the awareness of environmental protection is growing, and accordingly, various energy-saving equipment has emerged.

[0003] The steam exchange network is designed to complete the corresponding production steps by using steam to do work. However, the current steam exchange network often directly discharges the steam that has done work, resulting in direct energy waste, or uses a condenser to generate condensed water from the steam, which also indirectly increases energy consumption. The steam that has completed work often maintains a relatively high temperature. Whether it is directly discharged or reprocessed, it will generate additional power consumption, which is inconsistent with the purpose of energy conservation and emission reduction.

[0004] In addition, most of the current waste heat recovery devices have fixed heat exchange strokes and relatively fixed heat exchange amounts, while the steam heat output by the steam power exchange network fluctuates greatly, making it impossible to completely recover this type of steam heat, and their usability is insufficient. Summary of the invention

[0005] The object of the present invention is to provide a waste heat recovery heat exchanger for a steam power exchange network to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A waste heat recovery heat exchanger for a steam power exchange network, the waste heat recovery heat exchanger includes a shell, a regulating device, a heat exchange plate, a refrigerant pipe and a heat medium pipe, the refrigerant pipe and the heat medium pipe are respectively fastened to the shell, the regulating device is connected to the shell, a cold runner and a hot runner are provided on the shell, the refrigerant pipe is connected to the cold runner pipeline, the heat medium pipe is connected to the hot runner pipeline, a plurality of heat exchange grooves are provided on the shell, the heat exchange plates are placed in the heat exchange grooves, the two ends of the heat exchange plates are respectively inserted into the cold runner and the hot runner, the hot runner and the cold runner are arranged in a serpentine shape, and the regulating device is used to adjust the local circulation flow of the heat medium in the hot runner.

[0008] The shell serves as the main supporting base for installing other devices and provides space for heat exchange between refrigerant and heat medium. The refrigerant pipe is used to supply refrigerant, such as liquid supply, and the heat medium pipe is used to supply heat medium, that is, the steam produced by the steam exchange network. The steam is circulated and cooled through the serpentine arrangement of the cold runner and the hot runner. The heat exchanger plate is used to direct the heat of the heat medium to the refrigerant. During the cooling process, since the heat of the heat medium input from the steam exchange network is not fixed, but the heat exchange stroke is relatively fixed, the heat medium is locally circulated through the adjusting device, which is equivalent to extending the heat exchange time within the fixed stroke and improving the heat exchange quality.

[0009] Further, the shell is provided with a plurality of temperature sensing cavities, the temperature sensing cavities are located at the lower side of the hot runner, the regulating device includes a temperature sensing assembly, the temperature sensing assembly includes a temperature sensing sheet, the upper end of the temperature sensing sheet is inserted into the hot runner, the lower end of the temperature sensing sheet is inserted into the temperature sensing cavity, the length of the temperature sensing sheet in the temperature sensing cavity is not less than three times the length of the temperature sensing sheet inserted into the hot runner, the temperature sensing sheet and the temperature sensing cavity are tightly connected, the temperature sensing sheet includes a pre-tightening sheet and a relaxation sheet, the thermal expansion coefficient of the relaxation sheet is greater than the thermal expansion coefficient of the pre-tightening sheet, and the relaxation sheet and the pre-tightening sheet are tightly connected;

[0010] A detection cavity is provided on one side of the temperature sensing cavity, and a direction adjustment coil is provided in the detection cavity. The temperature sensing component also includes a transmission magnetic rod, which is slidably connected to the detection cavity. One end of the transmission magnetic rod abuts against the pre-tightening sheet, and the other end is inserted into the inner circle of the direction adjustment coil.

[0011] The temperature of the incoming heat medium is detected through the temperature sensing chamber. When the heat medium contacts the temperature sensing piece, the temperature sensing piece is heated by contact heat exchange. The temperature sensing piece includes a pre-tensioning piece and a relaxation piece with different thermal expansion coefficients. Since the pre-tensioning piece and the relaxation piece are fixed at the connection point between the temperature sensing chamber and the hot runner, when the pre-tensioning piece expands due to heat, the expansion length of the pre-tensioning piece is smaller than the expansion length of the relaxation piece after the same temperature increase. The pre-tensioning piece and the relaxation piece are relatively fixed. During the expansion process, a bend tending to the pre-tensioning piece is generated. During the bending process, the transmission magnetic rod is pushed to move, and the adjustment coil is made to cut the magnetic flux lines and generate an induced current. The current size is positively correlated with the bending degree of the pre-tensioning piece, that is, the higher the temperature, the greater the current generated on the adjustment coil.

[0012] Furthermore, the regulating device also includes a guide plate and a direction-adjusting cylinder. A plurality of guide plates are provided along the heat medium conveying direction in the hot runner. The guide plates are elastic plates. The guide plates are arranged obliquely. The lower end of the guide plate is close to the hot runner inlet. A direction-adjusting cavity is provided on one side of the hot runner. The direction-adjusting cylinder is placed in the direction-adjusting cavity. One end of the direction-adjusting cylinder is hinged to the direction-adjusting cavity, and the other end is hinged to the guide plate.

[0013] The steering coil and the steering cylinder are electrically connected.

[0014] The heat medium is guided by setting a guide plate. The steering cylinder adopts a double-end hinged form. The bottom end is hinged in the steering cavity, and the output end and the guide plate are hinged. Within the limited heat exchange stroke, the heat exchange amount tends to be stable. When the instantaneous temperature of the heat medium entering is too high, that is, the current value generated on the steering coil exceeds the calibrated current value, the steering cylinder is controlled to shrink according to the detected current value. The guide plate adopts an elastic plate. When the steering cylinder shrinks, the guide plate deforms and forms a bend. The movement trend of the upper end gradually approaches the hot runner inlet. When it passes the vertical state, the overheated heat medium is reversely guided to make the heat medium circulate locally and cool down.

[0015] Furthermore, the guide plate thickness is gradually set, and the guide plate thickness decreases from bottom to top.

[0016] By setting the thickness of the guide plate to be gradually changed, the curvature of the upper end of the guide plate is maximized during the deformation process, thereby facilitating the improvement of the reverse flow guidance efficiency of the heat medium.

[0017] Furthermore, the regulating device also includes a circulation plate, a circulation groove is provided on the shell, the circulation plate is placed in the circulation groove, and the circulation plate is arranged in an arc shape;

[0018] During circulation: the end of the guide plate faces the circulation plate, and the tail end of the circulation plate faces the heat exchanger fin.

[0019] By setting up a circulation plate and reversely guiding the flow through the guide plate, the heat medium entering the local circulation tends to flow along the upper wall of the hot runner, and forms an arc-shaped guide surface through the circulation plate in the circulation groove, so that the reversely guided heat medium re-enters the heat exchange stroke at the lower end and continues to contact the heat exchange plate for heat exchange, thereby reducing the temperature of the heat medium entering the next stroke, thereby reducing the final temperature of the heat medium at the hot runner outlet by a calibrated value, and causing no waste of resources.

[0020] Furthermore, the regulating device also includes an extended stroke cylinder, the extended stroke cylinder and the circulation groove are fastened together, the output end of the extended stroke cylinder and the circulation plate are fastened together, the circulation plate and the circulation groove are slidably connected, and the adjustment coil and the extended stroke cylinder are electrically connected.

[0021] The extended-stroke cylinder is fixed in the circulation groove, and the output end is used to drive the circulation plate to move. According to the detected heat medium temperature, as the temperature increases, the current of the adjustment coil increases, and the extended-stroke cylinder drives the circulation plate to move in the opposite direction away from the guide plate along the circulation groove, thereby extending the heat exchange stroke to a certain extent.

[0022] As an optimization, the cold runner at the bottom is located below the hot runner. The refrigerant enters from the upper inlet of the cold runner and exits from the lower outlet. The hot medium enters from the lower inlet of the hot runner and exits from the upper outlet. The cold runner is within the heat exchange stroke of the bottom layer and is located at the lower end of the hot runner to ensure the heat exchange quality.

[0023] As an optimization, the cold runner is provided with a heat exchange section, a contraction section and a liquid outlet in sequence along the refrigerant feeding direction. The contraction section is provided with a slide groove. The adjusting device also includes a floating seat. The floating seat and the slide groove are slidably connected. The contraction section and the bottom surface of the liquid outlet are at the same height. An empty chamber is provided on the floating seat. The floating seat is provided with a liquid facing surface on the side close to the heat exchange section.

[0024] The cold runner adopts a three-section setting. The bottom surface of the heat exchange section, the contraction section and the bottom surface of the liquid outlet are located in the same straight line. The flow cross-section of the liquid outlet is smaller than the flow cross-section of the heat exchange section. It contracts through the contraction section. The refrigerant in the heat exchange section flows as a partially liquid flow. During the heat exchange process, part of the refrigerant generates bubbles and floats up, causing the refrigerant to fluctuate. In the initial state, the float seat is at the lowest position under its own gravity. At this time, the flow cross-section of the contraction section is the smallest. When the refrigerant enters the contraction section, the float seat is made of lightweight material and is set at a specific angle to the liquid surface. An empty chamber is set in the middle. As the amount of refrigerant increases, the float seat moves up and increases the flow cross-section of the contraction section, so that the refrigerant enters the liquid outlet as a fully liquid after heat exchange to prevent the generation of bubbles.

[0025] As an optimization, the liquid-facing surface is tilted. By tilting the liquid-facing surface, the refrigerant is guided to prevent the refrigerant from entering the empty chamber and affecting the floating effect.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: during the cooling process, since the heat of the heat medium input from the steam power exchange network is not fixed, but the heat exchange stroke is relatively fixed, the heat medium is locally circulated through the regulating device, which is equivalent to extending the heat exchange time within the fixed stroke and improving the heat exchange quality; the temperature sensing plate includes a pre-tensioning plate and a relaxation plate with two different thermal expansion coefficients. Since the pre-tensioning plate and the relaxation plate are fixed at the connection point between the temperature sensing chamber and the hot runner, when the pre-tensioning plate expands due to heat, the expansion length of the pre-tensioning plate is smaller than the expansion length of the relaxation plate after the same temperature is raised, and the pre-tensioning plate and the relaxation plate are relatively fixed, and during the expansion process, a bending tending to the pre-tensioning plate is generated During the bending process, the transmission magnetic rod is pushed to move, and the steering coil cuts the magnetic flux lines and generates an induced current. The current size is positively correlated with the bending degree of the preload plate, that is, the higher the temperature, the greater the current generated on the steering coil; when the instantaneous entering heat medium temperature is too high, that is, the current value generated on the steering coil exceeds the calibrated current value, according to the detected current value, the steering cylinder is controlled to contract, and the guide plate adopts an elastic plate. When the steering cylinder contracts, the guide plate deforms and forms a bend. The upper end moves gradually close to the hot runner inlet. When it passes the vertical state, the overheated heat medium is reversely guided, so that the heat medium circulates locally and cools down. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the cold runner and hot runner distribution of the present invention;

[0029] Figure 3 It is a schematic diagram of the refrigerant and heat medium feeding of the present invention;

[0030] Figure 4 for Figure 2 A magnified view of a part A of the view;

[0031] Figure 5 for Figure 3 A magnified view of a part B of the view;

[0032] Figure 6 for Figure 3 Enlarged view of detail C of view.

[0033] In the figure: 1. Shell; 11. Cold runner; 111. Heat exchange section; 112. Contraction section; 113. Slide; 114. Liquid outlet; 12. Hot runner; 13. Temperature sensing chamber; 14. Adjustment chamber; 15. Detection chamber; 16. Circulation groove; 2. Adjustment device; 21. Guide plate; 22. Adjustment cylinder; 23. Temperature sensing assembly; 231. Temperature sensing sheet; 2311. Pre-tightening sheet; 2312. Relaxation sheet; 232. Transmission magnetic rod; 233. Adjustment coil; 24. Circulation plate; 25. Extension cylinder; 26. Floating seat; 261. Liquid surface; 262. Empty chamber; 3. Heat exchange sheet; 4. Refrigerant pipe; 5. Heat medium pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example: Figure 1-Figure 6 As shown, the present invention provides a technical solution for a waste heat recovery heat exchanger for a steam power exchange network.

[0036] A waste heat recovery heat exchanger for a steam power exchange network includes a shell 1, a regulating device 2, a heat exchange plate 3, a refrigerant pipe 4 and a heat medium pipe 5. The refrigerant pipe 4 and the heat medium pipe 5 are respectively fastened to the shell 1, the regulating device 2 is connected to the shell 1, a cold runner 11 and a hot runner 12 are provided on the shell 1, the refrigerant pipe 4 and the cold runner 11 are connected by pipes, the heat medium pipe 5 and the hot runner 12 are connected by pipes, a plurality of heat exchange grooves are provided on the shell 1, the heat exchange plate 3 is placed in the heat exchange grooves, the two ends of the heat exchange plate 3 are respectively inserted into the cold runner 11 and the hot runner 12, the hot runner 12 and the cold runner 11 are arranged in a serpentine shape, and the regulating device 2 is used to adjust the local circulation flow of the heat medium in the hot runner 12.

[0037] The shell 1 serves as the main supporting base for installing other devices and provides space for heat exchange between refrigerant and heat medium. The refrigerant pipe 4 is used to supply refrigerant, such as liquid supply, and the heat medium pipe 5 is used to supply heat medium, that is, the steam produced by the steam exchange network. The steam is serpentine-shaped through the cold runner 11 and the hot runner 12 for circulation and cooling. The heat exchange plate 3 is used to direct the heat of the heat medium to the refrigerant. During the cooling process, since the heat of the heat medium input from the steam exchange network is not fixed, but the heat exchange stroke is relatively fixed, the heat medium is locally circulated through the regulating device 2, which is equivalent to extending the heat exchange time within the fixed stroke and improving the heat exchange quality.

[0038] Further, the housing 1 is provided with a plurality of temperature sensing cavities 13, the temperature sensing cavities 13 are located at the lower side of the hot runner 12, the regulating device 2 includes a temperature sensing component 23, the temperature sensing component 23 includes a temperature sensing piece 231, the upper end of the temperature sensing piece 231 is inserted into the hot runner 12, the lower end of the temperature sensing piece 231 is inserted into the temperature sensing cavity 13, the length of the temperature sensing piece 231 in the temperature sensing cavity 13 is not less than three times the length of the temperature sensing piece 231 inserted into the hot runner 12, the temperature sensing piece 231 and the temperature sensing cavity 13 are fastened and connected, the temperature sensing piece 231 includes a pre-tightening piece 2311 and a relaxation piece 2312, the thermal expansion coefficient of the relaxation piece 2312 is greater than the thermal expansion coefficient of the pre-tightening piece 2311, and the relaxation piece 2312 and the pre-tightening piece 2311 are fastened and connected;

[0039] A detection chamber 15 is provided on one side of the temperature sensing chamber 13, and a steering coil 233 is provided in the detection chamber 15. The temperature sensing component 23 also includes a transmission magnetic rod 232, which is slidably connected to the detection chamber 15. One end of the transmission magnetic rod 232 abuts against the pre-tightening plate 2311, and the other end is inserted into the inner circle of the steering coil 233.

[0040] The temperature of the incoming heat medium is detected through the temperature sensing chamber 13. When the heat medium contacts the temperature sensing piece 231, the temperature sensing piece 231 is heated by contact heat exchange. The temperature sensing piece 231 includes a pre-tensioning piece 2311 and a relaxation piece 2312 with different thermal expansion coefficients. Since the pre-tensioning piece 2311 and the relaxation piece 2312 are fixed at the connection point between the temperature sensing chamber 13 and the hot runner 12, when the pre-tensioning piece 2311 expands due to heat, the expansion length of the pre-tensioning piece 2311 is smaller than the expansion length of the relaxation piece 2312 after the same temperature is increased. The pre-tensioning piece 2311 and the relaxation piece 2312 are relatively fixed. During the expansion process, a bend tending to the pre-tensioning piece 2311 is generated. During the bending process, the transmission magnetic rod 232 is pushed to move, and the steering coil 233 is moved to cut the magnetic flux lines, and an induced current is generated. The current size is positively correlated with the bending degree of the pre-tensioning piece 2311, that is, the higher the temperature, the greater the current generated on the steering coil 233.

[0041] Furthermore, the regulating device 2 further includes a guide plate 21 and a direction adjustment cylinder 22. A plurality of guide plates 21 are provided along the heat medium conveying direction in the hot runner 12. The guide plates 21 are elastic plates. The guide plates 21 are arranged obliquely. The lower end of the guide plate 21 is close to the inlet of the hot runner 12. A direction adjustment cavity 14 is provided on one side of the hot runner 12. The direction adjustment cylinder 22 is placed in the direction adjustment cavity 14. One end of the direction adjustment cylinder 22 is hinged to the direction adjustment cavity 14, and the other end is hinged to the guide plate 21.

[0042] The steering coil 233 is electrically connected to the steering cylinder 22 .

[0043] The guide plate 21 is provided to guide the heat medium. The steering cylinder 22 is hinged at both ends. The bottom end is hinged in the steering cavity 14, and the output end is hinged to the guide plate 21. Within a limited heat exchange stroke, the heat exchange amount tends to be stable. When the instantaneous temperature of the heat medium entering is too high, that is, the current value generated on the steering coil 233 exceeds the calibrated current value, the steering cylinder 22 is controlled to contract according to the detected current value. The guide plate 21 is an elastic plate. When the steering cylinder 22 contracts, the guide plate 21 is deformed and bends. The upper end moves gradually close to the inlet of the hot runner 12. When it passes the vertical state, the overheated heat medium is reversely guided to allow the heat medium to circulate locally and cool down.

[0044] Furthermore, the guide plate 21 is gradually set in thickness, and the thickness of the guide plate 21 decreases from bottom to top.

[0045] The thickness of the guide plate 21 is gradually changed so that the curvature of the upper end of the guide plate 21 is the largest during the deformation process, thereby facilitating the improvement of the reverse flow guidance efficiency of the heat medium.

[0046] Furthermore, the regulating device 2 further comprises a circulation plate 24, a circulation groove 16 is provided on the housing 1, the circulation plate 24 is placed in the circulation groove 16, and the circulation plate 24 is arranged in an arc shape;

[0047] During circulation: the end of the guide plate 21 faces the circulation plate 24 , and the rear end of the circulation plate 24 faces the heat exchange fin 3 .

[0048] By setting up the circulation plate 24 and reversely guiding the flow through the guide plate 21, the heat medium entering the local circulation tends to flow along the upper wall of the hot runner 12, and forms an arc-shaped guide surface through the circulation plate 24 in the circulation groove 16, so that the reversely guided heat medium re-enters the heat exchange stroke at the lower end and continues to contact with the heat exchange plate 3 for heat exchange, thereby reducing the temperature of the heat medium entering the next stroke, thereby reducing the temperature of the heat medium finally exiting the hot runner 12 by a calibrated value, and does not cause waste of resources.

[0049] Furthermore, the adjusting device 2 also includes an extension cylinder 25, the extension cylinder 25 and the circulation groove 16 are fastened together, the output end of the extension cylinder 25 and the circulation plate 24 are fastened together, the circulation plate 24 and the circulation groove 16 are slidably connected, and the adjustment coil 233 and the extension cylinder 25 are electrically connected.

[0050] The extended-stroke cylinder 25 is fixed in the circulation groove 16, and the output end is used to drive the circulation plate 24 to move. According to the detected heat medium temperature, as the temperature is higher, the current of the adjustment coil 233 is larger, and the extended-stroke cylinder 25 drives the circulation plate 24 to move in the opposite direction away from the guide plate 21 along the circulation groove 16, thereby extending the heat exchange stroke to a certain extent.

[0051] As an optimization, the cold runner 11 at the bottom is located below the hot runner 12. The refrigerant enters from the upper inlet of the cold runner 11 and exits from the lower outlet, and the hot medium enters from the lower inlet of the hot runner 12 and exits from the upper outlet. The cold runner 11 is within the heat exchange stroke of the bottom layer and is located at the lower end of the hot runner 12 to ensure the heat exchange quality.

[0052] As an optimization, the cold runner 11 is provided with a heat exchange section 111, a contraction section 112 and a liquid outlet 114 in sequence along the refrigerant feeding direction, the contraction section 112 is provided with a slide groove 113, the adjustment device 2 also includes a floating seat 26, the floating seat 26 and the slide groove 113 are slidably connected, the bottom surfaces of the contraction section 112 and the liquid outlet 114 are located at the same height, the floating seat 26 is provided with an empty chamber 262, and the floating seat 26 is provided with a liquid facing surface 261 on the side close to the heat exchange section 111.

[0053] The cold runner 11 adopts a three-section setting. The bottom surface of the heat exchange section 111, the contraction section 112 and the bottom surface of the liquid outlet 114 of the lowest layer are located on the same straight line. The flow cross-section of the liquid outlet 114 is smaller than the flow cross-section of the heat exchange section 111. It contracts through the contraction section 112. The refrigerant in the heat exchange section 111 flows as a partially liquid flow. During the heat exchange process, part of the refrigerant generates bubbles and floats up, causing the refrigerant to fluctuate. In the initial state, the floating seat 26 is at the lowest position under its own gravity. At this time, the flow cross-section of the contraction section 112 is the smallest. When the refrigerant enters the contraction section 112, the floating seat 26 is made of lightweight material and is set at a specific angle to the liquid surface 261. An empty chamber 262 is set in the middle. As the amount of refrigerant increases, the floating seat 26 moves up and increases the flow cross-section of the contraction section 112, so that the refrigerant enters the liquid outlet 114 as a fully liquid after heat exchange to prevent the generation of bubbles.

[0054] As an optimization, the liquid-facing surface 261 is arranged tilted. By tilting the liquid-facing surface 261, the refrigerant is guided to prevent the refrigerant from entering the empty chamber 262 and affecting the floating effect.

[0055] The working principle of the present invention is as follows: during the cooling process, since the heat of the heat medium input from the steam power exchange network is not fixed, but the heat exchange stroke is relatively fixed, the heat medium is locally circulated through the regulating device 2, which is equivalent to extending the heat exchange time within the fixed stroke and improving the heat exchange quality; the temperature sensing piece 231 includes a pre-tightening piece 2311 and a relaxation piece 2312 with two different thermal expansion coefficients. Since the pre-tightening piece 2311 and the relaxation piece 2312 are fixed at the connection point between the temperature sensing chamber 13 and the hot runner 12, when the pre-tightening piece 2311 expands due to the same temperature increase, the expansion length of the pre-tightening piece 2311 is less than the expansion length of the relaxation piece 2312, and the pre-tightening piece 2311 and the relaxation piece 2312 are relatively fixed. During the expansion process, a tendency to expand toward the pre-tightening piece 2311 is generated. 11 is bent. During the bending process, the transmission magnetic rod 232 is pushed to move, and the steering coil 233 moves to cut the magnetic flux lines and generate an induced current. The current size is positively correlated with the bending degree of the preload sheet 2311, that is, the higher the temperature, the greater the current generated on the steering coil 233; when the temperature of the instantaneous heat medium entering is too high, that is, the current value generated on the steering coil 233 exceeds the calibrated current value, the steering cylinder 22 is controlled to contract according to the detected current value, and the guide plate 21 adopts an elastic plate. When the steering cylinder 22 contracts, the guide plate 21 is deformed and forms a bend. The movement trend of the upper end gradually approaches the inlet of the hot runner 12. When it passes the vertical state, the overheated heat medium is reversely guided, so that the heat medium is locally circulated and cooled.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A waste heat recovery heat exchanger for a steam power exchange network, characterized in that: The waste heat recovery heat exchanger comprises a shell (1), a regulating device (2), a heat exchange plate (3), a refrigerant pipe (4) and a heat medium pipe (5), wherein the refrigerant pipe (4) and the heat medium pipe (5) are respectively fastened to the shell (1), the regulating device (2) is connected to the shell (1), a cold runner (11) and a hot runner (12) are provided on the shell (1), the refrigerant pipe (4) and the cold runner (11) are connected by pipeline, the heat medium pipe (5) and the hot runner (12) are connected by pipeline, a plurality of heat exchange grooves are provided on the shell (1), the heat exchange plate (3) is placed in the heat exchange groove, two ends of the heat exchange plate (3) are respectively inserted into the cold runner (11) and the hot runner (12), the hot runner (12) and the cold runner (11) are arranged in a serpentine shape, and the regulating device (2) is used to regulate the local circulation flow of the heat medium in the hot runner (12); The housing (1) is provided with a plurality of temperature sensing cavities (13), the temperature sensing cavities (13) being located at the lower side of the hot runner (12), the regulating device (2) comprising a temperature sensing component (23), the temperature sensing component (23) comprising a temperature sensing sheet (231), the upper end of the temperature sensing sheet (231) being inserted into the hot runner (12), the lower end of the temperature sensing sheet (231) being inserted into the temperature sensing cavity (13), the length of the temperature sensing sheet (231) located in the temperature sensing cavity (13) being not less than three times the length of the temperature sensing sheet (231) when inserted into the hot runner (12), the temperature sensing sheet (231) and the temperature sensing cavity (13) being tightly connected, the temperature sensing sheet (231) comprising a pre-tightening sheet (2311) and a relaxation sheet (2312), the thermal expansion coefficient of the relaxation sheet (2312) being greater than the thermal expansion coefficient of the pre-tightening sheet (2311), the relaxation sheet (2312) and the pre-tightening sheet (2311) being tightly connected; A detection chamber (15) is provided on one side of the temperature sensing chamber (13), a direction adjustment coil (233) is provided in the detection chamber (15), and the temperature sensing component (23) further comprises a transmission magnetic rod (232), the transmission magnetic rod (232) and the detection chamber (15) are slidably connected, one end of the transmission magnetic rod (232) is in contact with the pre-tightening sheet (2311), and the other end is inserted into the inner circle of the direction adjustment coil (233).

2. A waste heat recovery heat exchanger for a steam power exchange network according to claim 1, characterized in that: The regulating device (2) further comprises a guide plate (21) and a direction-adjusting cylinder (22); a plurality of guide plates (21) are provided along the direction of heat medium transport in the hot runner (12); the guide plates (21) are elastic plates; the guide plates (21) are arranged obliquely; the lower end of the guide plate (21) is close to the inlet of the hot runner (12); a direction-adjusting cavity (14) is provided on one side of the hot runner (12); the direction-adjusting cylinder (22) is disposed in the direction-adjusting cavity (14); one end of the direction-adjusting cylinder (22) is hinged to the direction-adjusting cavity (14); and the other end of the direction-adjusting cylinder (22) is hinged to the guide plate (21); The steering coil (233) and the steering cylinder (22) are electrically connected.

3. A waste heat recovery heat exchanger for a steam power exchange network according to claim 2, characterized in that: The guide plate (21) has a gradually changing thickness, with the thickness of the guide plate (21) decreasing from bottom to top.

4. A waste heat recovery heat exchanger for a steam power exchange network according to claim 3, characterized in that: The regulating device (2) further comprises a circulation plate (24), the housing (1) is provided with a circulation groove (16), the circulation plate (24) is placed in the circulation groove (16), and the circulation plate (24) is arranged in an arc shape; During circulation: the end of the guide plate (21) faces the circulation plate (24), and the rear end of the circulation plate (24) faces the heat exchange plate (3).

5. A waste heat recovery heat exchanger for a steam power exchange network according to claim 4, characterized in that: The regulating device (2) further comprises an extension cylinder (25), the extension cylinder (25) and the circulation groove (16) are tightly connected, the output end of the extension cylinder (25) and the circulation plate (24) are tightly connected, the circulation plate (24) and the circulation groove (16) are slidably connected, and the direction adjustment coil (233) and the extension cylinder (25) are electrically connected.

6. A waste heat recovery heat exchanger for a steam power exchange network according to claim 5, characterized in that: The cold runner (11) at the bottom layer is located below the hot runner (12).

7. A waste heat recovery heat exchanger for a steam power exchange network according to claim 6, characterized in that: The cold flow channel (11) is provided with a heat exchange section (111), a contraction section (112) and a liquid outlet (114) in sequence along the refrigerant feeding direction; the contraction section (112) is provided with a slide groove (113); the regulating device (2) further comprises a floating seat (26); the floating seat (26) and the slide groove (113) are slidably connected; the bottom surfaces of the contraction section (112) and the liquid outlet (114) are located at the same height; the floating seat (26) is provided with an empty chamber (262); and the floating seat (26) is provided with a liquid facing surface (261) on a side close to the heat exchange section (111).

8. The waste heat recovery heat exchanger for a steam power exchange network according to claim 7, characterized in that: The liquid-facing surface (261) is arranged inclined.

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