Heat Pump Steam Engine Flue Gas Recovery System and Recovery Process

Abstract

The invention discloses a flue gas recovery system and a recovery process for a heat pump steam engine, comprising a flue gas recovery device; the flue gas recovery device comprises a flue and a heating chamber; the flue and the heating chamber are connected via a plurality of superconducting heat pipes; the superconducting heat pipe comprises a heat absorbing part arranged in the flue and a heat dissipating part arranged in a heating tank; a plurality of fins are arranged on the outer wall of the heat absorbing part; the superconducting heat pipe is filled with a superconducting medium, and the superconducting medium transfers the heat absorbed by the heat absorbing part to the heat dissipating part for heating the fluid in the heating chamber; the invention provides a waste heat recovery system for boiler flue gas, which further produces steam by recovering the waste heat of the flue gas, thereby greatly saving energy output, and at the same time, the flue gas passing through the system does not generate white gas, thereby greatly reducing thermal pollution.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery devices, in particular to a flue gas recovery system and a recovery process for a heat pump steam engine. Background Art

[0002] In the prior art, there are two ways to generate saturated steam. One is to use a boiler to heat water with fuel or other energy to generate saturated steam. The other is to use the waste heat generated when heating the boiler to directly heat water to generate saturated steam.

[0003] The exhaust temperature of existing boilers is designed to be above 150℃ in order to prevent the sulfur-containing components in the fuel from producing acidic substances such as NOx compounds during the combustion process, which will corrode the tail of the heating surface of the boiler, reduce the strength of the tail heating surface, endanger the safe operation of the boiler, and cause the boiler to be scrapped in advance. Therefore, the design exhaust temperature of conventional oil and gas boilers (direct-fired engines) at home and abroad is greater than 150℃, and the thermal efficiency is generally 70~85%, which makes it difficult to maximize the use of energy.

[0004] The present invention provides a superconducting flue gas recovery device, through which the waste heat of the flue gas can be effectively recovered and utilized, so that the waste heat can further heat pure water to generate steam, thereby maximizing energy utilization. Summary of the invention

[0005] The present invention aims at the deficiencies in the prior art and provides a heat pump steam engine flue gas recovery system and a recovery process.

[0006] In order to solve the above technical problems, the present invention solves them through the following technical solutions: a flue gas recovery system for a heat pump steam engine includes a flue gas recovery device.

[0007] In the above scheme, preferably, the fume recovery device includes a flue and a heating chamber;

[0008] The flue and the heating chamber are connected via a plurality of superconducting heat pipes;

[0009] The superconducting heat pipe comprises a heat absorbing part arranged in the flue and a heat dissipating part arranged in the heating tank;

[0010] A plurality of fins are arranged on the outer wall of the heat absorbing part;

[0011] The superconducting heat pipe is filled with a superconducting medium, and the superconducting medium transfers the heat absorbed by the heat absorbing part to the heat dissipating part to heat the fluid in the heating chamber.

[0012] In the above solution, preferably, the superconducting heat pipe is a vacuum tube, and the superconducting working medium is liquid.

[0013] In the above scheme, preferably, the fins are evenly arranged on the outer wall of the heat absorption part in a radial shape.

[0014] In the above scheme, preferably, the superconducting heat pipe is rotatably arranged on the flue, and a bimetallic sheet in contact with the fin on the side close to the smoke inlet is arranged in the flue;

[0015] The superconducting heat pipe is provided with a clutch for driving the superconducting heat pipe to rotate, the flue is provided with a driving wheel matched with the clutch, the clutch is provided with a driving plate connected with the bimetallic strip, and the driving plate is connected with the bimetallic strip through a driving rod.

[0016] In the above solution, preferably, the clutch is provided with a first tooth portion, and the driving wheel is provided with a second tooth portion meshing with the first tooth portion.

[0017] In the above scheme, preferably, a transmission box is provided on the flue, the driving wheel is rotatably arranged in the transmission box, a transmission belt is provided between adjacent driving wheels, a driving motor for driving each driving wheel to rotate is provided on the transmission box, and the driving motor is connected to any driving wheel through an active belt transmission;

[0018] Grating components for detecting the sliding rear clutch are symmetrically arranged on both sides of the transmission box, and the grating components are electrically connected to the driving motor.

[0019] In the above scheme, preferably, the driving plate is sleeved on the clutch, a sensor cooperating with the clutch is provided on the driving plate, and a sensing arm for being sensed by the sensor is provided on the clutch.

[0020] In the above scheme, preferably, an electromagnet for adsorbing the driving plate is provided on the flue, and the electromagnet is electrically connected to the sensor.

[0021] In the above scheme, preferably, the superconducting heat pipe is provided with a driving shaft cooperating with a clutch, the clutch is slidably arranged on the driving shaft, the clutch is provided with a striking block, and the end of the driving shaft is provided with a hammer hole cooperating with the striking block.

[0022] In the above scheme, preferably, the recovery process of the flue gas recovery system of the heat pump steam engine is as follows:

[0023] S1: High-temperature flue gas enters the flue from the smoke inlet, and then contacts the fins in the flue, transferring the heat of the flue gas to the heat dissipation part through the superconducting working medium in the superconducting heat pipe, thereby heating the fluid in the heating chamber;

[0024] S2: When the fin on the side close to the smoke inlet reaches the deformation temperature of the bimetallic strip, the bimetallic strip deforms, and the driving plate is driven to slide through the driving rod, so that the clutch slides and engages with the driving wheel;

[0025] S3: After the clutch slips, it is detected by the grating assembly, so that the drive motor starts, driving the drive wheel to rotate, and further the clutch rotates to drive the superconducting heat pipe to rotate;

[0026] S4: The sensing arm on the clutch rotates 180° and is sensed by the sensor, so that the electromagnet is energized to adsorb the drive plate, so that the clutch is disengaged from the drive wheel. At the same time, the drive plate slides to make the drive rod press against the bimetallic strip, so that the bimetallic strip is reset and re-contacts the fin on the side close to the smoke inlet after rotation, and the next detection is carried out.

[0027] The beneficial effects of the present invention are as follows: the present invention provides a waste heat recovery system for boiler flue gas, which further produces steam by recovering the waste heat of flue gas, thereby greatly saving energy output. At the same time, the flue gas passing through the system does not generate white gas, thereby greatly reducing thermal pollution;

[0028] In addition, the present invention adopts a rotating setting for the fins of the superconducting heat pipe. After the fins reach the temperature, the fins are rotated so that the fins with lower temperature on the other side are in contact with the flue gas, thereby improving the heat absorption effect on the flue gas and maximizing the heat absorption of the flue gas per unit time. The superconducting working medium in the superconducting heat pipe is used to instantly convert the heat of the flue gas to heat the heating chamber, thereby improving the utilization efficiency of the flue gas heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the position of the smoke recovery device of the present invention.

[0030] Figure 2 It is a schematic cross-sectional structure diagram of the smoke recovery device of the present invention.

[0031] Figure 3 It is a schematic diagram of the partially enlarged structure of location A of the present invention.

[0032] Figure 4 It is a bottom-up three-dimensional structural schematic diagram of the clutch of the present invention.

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of the clutch of the present invention when viewed from above.

[0034] Figure 6 It is a schematic diagram of the structure of the superconducting heat pipe of the present invention when viewed from above. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figure 1-Figure 6 , heat pump steam engine flue gas recovery system, such as Figure 1As shown, it includes a boiler 10, a bag filter 11, a desulfurization wet process tower 12 and a flue gas recovery device. The high-temperature flue gas generated by the boiler 10 passes through the bag filter 11 and the desulfurization wet process tower 12 and then enters the flue gas recovery device. When entering the flue gas recovery device, the flue gas temperature is above 150°C.

[0036] The flue gas recovery device includes a flue 1 and a heating chamber 2. The flue gas enters the smoke inlet of the flue 1 and is then discharged through a chimney 13. The heating chamber 2 is arranged above the flue 1 and is preferably fixedly connected to the upper wall of the flue 1. The heating chamber 2 is filled with pure water. The heating chamber 2 is connected to the flue 1 through a plurality of superconducting heat pipes 3. Specifically, Figure 2 As shown, the superconducting heat pipe 3 includes a heat absorbing part 301 and a heat dissipating part 302. The heat dissipating part 302 is placed on the top and arranged in the heating chamber 2. The heat absorbing part 301 is placed in the flue 1, and a plurality of fins 303 are arranged on its outer wall for absorbing heat from the high-temperature flue gas in the flue 1. The absorbed heat is then conducted to the heat dissipating part 302 through the fins 303, thereby heating the heating chamber 2.

[0037] The heat absorbing part 301 and the heat dissipating part 302 are preferably integrally formed and are hollow tubes made of highly corrosion-resistant metals, and the interior is in a vacuum state. In order to enhance the heat conduction in the tube, the superconducting heat pipe 3 is filled with a superconducting medium, and the superconducting medium is a liquid, or a gas with excellent thermal conductivity. In this embodiment, liquid is preferably selected, and liquids with good thermal conductivity such as alcohol solution or mercury liquid can be used. After the fins 303 absorb heat, the superconducting medium in the tube is unpoweredly transported to the heating chamber 2 on the upper part of the flue gas recovery device, and the heat is released to the pure water, thereby heating the pure water to generate steam.

[0038] like Figure 6 As shown, the fins 303 are evenly arranged radially around the center of the superconducting heat pipe 3. In this embodiment, 8 fins are arranged as an example. The fins 303 on the side of the smoke inlet close to the flue 1 are preferably arranged parallel to the smoke flow direction, so that when the smoke enters, the heat absorbed by the fins 303 is most directly, and the fins on this side heat up faster than the fins on the other side of the superconducting heat pipe 3.

[0039] When the temperature of the fin 303 on one side is high, the efficiency of heat transfer of the superconducting medium close to the side is in a saturated state. Therefore, the present embodiment provides a rotatable superconducting heat pipe 3, so that the fin 303 on one side rotates 180° after reaching a certain temperature, so that the fin 303 on the other side is on the side of the flue gas inlet direction, thereby improving the uniformity of heating of the entire superconducting heat pipe 3; specifically, as Figure 2-Figure 3 As shown, a driving shaft 311 is fixedly disposed at the lower end of the superconducting heat pipe 3 , and the driving shaft 311 is rotatably disposed on the lower side wall of the flue 1 and penetrates the lower side wall of the flue 1 .

[0040] The driving shaft 311 is provided with a clutch 304 after passing through the wall of the flue 1. The clutch 304 is slidably arranged on the driving shaft 311, and its inner hole is slidably matched with the driving shaft 311 through a spline. A transmission box 103 is provided on the outer wall of the lower side of the flue 1. A driving wheel 101 matched with each clutch 304 is rotatably arranged in the transmission box 103. Adjacent driving wheels 101 are connected by a transmission belt 104, and a driving motor 105 connected by transmission to any driving wheel 101 is provided on the transmission box 103. The driving motor 105 and any driving wheel 101 can be connected by a driving belt 106. That is, when the driving motor 105 is started, each driving wheel 101 corresponding to the clutch 304 at the lower end of the superconducting heat pipe 3 can be rotated.

[0041] The clutch 304 is provided with a first tooth portion 307 on the lower end surface. The first tooth portion 307 is preferably a small tooth that is spaced and protrudes from the end surface and is arranged in a circumference, that is, Figure 5 The state shown; the upper end surface of the driving wheel 101 is provided with a second tooth portion 102 that can mesh with the first tooth portion 307. When the clutch 304 slides downward, it can mesh with the driving wheel 101 as a whole through the meshing of the teeth. Then, when the driving wheel 101 rotates, the superconducting heat pipe 3 can be driven to rotate through the clutch 304; in order to enable the driving wheel 101 to rotate in a timely manner, grating components 5 for detecting the clutch 304 after sliding are symmetrically provided on both sides of the transmission box 103. The grating component 5 is electrically connected to the driving motor 105, that is, when any clutch 304 slides downward, it can enter the detection range of the grating component 5, and then the grating component 5 feeds back a signal to the driving motor 105, so that the motor starts and drives the driving wheel 101 to rotate.

[0042] The bottom of the flue 1 near the transmission box 103 is provided with a bimetallic strip 4 for driving the clutch 304 to slide. The bimetallic strip 4 contacts the bottom of the fin 303 on the side of the flue 1 near the smoke inlet. Figure 3 As shown, the bimetallic strip 4 is preferably arranged in an arc shape, which is in a state of Figure 3 State, that is, the arc-shaped raised surface is in contact with the fin 303, and a driving rod 306 is fixedly arranged on the surface of the bimetallic strip 4 away from the fin 303. The driving rod 306 is vertically downwardly penetrated through the wall of the flue 1. The driving rod 306 is preferably a hexagonal rod, so that the driving rod 306 can be guided and slidable.

[0043] After the driving rod 306 passes through the wall of the flue 1 downward, a driving plate 305 connected to the clutch 304 is fixedly provided. One side of the driving plate 305 is fixed to the driving rod 306, and the other side is sleeved in the annular groove of the clutch 304, that is, the clutch 304 can rotate freely on the driving plate 305. When the temperature of the bimetallic strip 4 reaches the heat absorption temperature of the fin 303, the bimetallic strip 4 is deformed, so that the raised surface on the upper surface deforms downward, driving the driving rod 306 to slide downward, further driving the clutch 304 to slide downward to trigger the grating assembly 5 and then engage with the driving wheel 101, and then the driving motor 105 is started to drive the driving wheel 101 to rotate so that the superconducting heat pipe 3 engaged with it rotates synchronously.

[0044] In order to make the superconducting heat pipe 3 rotate 180 degrees after the clutch 304 is triggered, the driving plate 305 is provided with a sensor 308 that cooperates with the clutch 304. Specifically, the clutch 304 is provided with a sensing arm 309 for being sensed by the sensor 308. Figure 4-Figure 5 As shown, the sensing arm 309 is symmetrically arranged at 180°; an electromagnet 310 for adsorbing the driving plate 305 is provided on the flue 1, and the electromagnet 310 is electrically connected to the sensor 308. When the sensor 308 is triggered, the electromagnet 310 can be energized for 1-10 seconds, and the specific time can be set according to the cooling property of the bimetallic strip, so that the electromagnet 310 adsorbs the driving plate 305, and further makes the clutch 304 slide upward and disengage from the driving wheel 101. At the same time, the driving rod 306 is forced to press upward against the bimetallic strip 4, so that the bimetallic strip 4 is reset and contacts with the fin 303 on the other side after rotation, and the temperature of the fin 303 is re-detected.

[0045] The clutch 304 is provided with a striking block 312, and the striking block 312 is arranged on the side of the spline hole of the clutch 304 facing the driving shaft 311. The end of the driving shaft 311 is provided with a hammer hole 313 matched with the striking block 312. When the clutch 304 slides upward, the upper end of the striking block 312 can contact and collide with the bottom of the hammer hole 313, thereby causing the entire superconducting heat pipe 3 to vibrate, shaking off the smoke and dust accumulated on the fins 303, and causing the superconducting working fluid with a lower stability after heat exchange in the upper part of the tube to quickly drop and mix with the working fluid with a higher temperature in the lower part, thereby accelerating heat exchange.

[0046] The recovery process of the flue gas recovery system of the heat pump steam engine is as follows:

[0047] S1: High-temperature flue gas enters the flue 1 from the smoke inlet, and then contacts the fins 303 in the flue 1, transferring the heat of the flue gas to the heat dissipation part 302 through the superconducting working medium in the superconducting heat pipe 3, thereby heating the fluid in the heating chamber 2;

[0048] S2: When the fin 303 near the smoke inlet reaches the deformation temperature of the bimetallic strip 4, the bimetallic strip 4 is deformed, and the driving rod 306 drives the driving plate 305 to slide, so that the clutch 304 slides and meshes with the driving wheel 101;

[0049] S3: After the clutch 304 slips, it is detected by the grating assembly 5, so that the drive motor 105 is started, driving the drive wheel 101 to rotate, and further rotating the clutch 304 to drive the superconducting heat pipe 3 to rotate;

[0050] S4: The sensing arm 309 on the clutch 304 rotates 180° and is sensed by the sensor 308, so that the electromagnet 310 is energized to adsorb the driving plate 305, so that the clutch 304 is disengaged from the driving wheel 101. At the same time, the driving plate 305 slides to make the driving rod 306 press against the bimetallic strip 4, so that the bimetallic strip 4 is reset and re-contacts the fin 303 on the side close to the smoke inlet after rotation, and the next detection is carried out.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat pump steam engine flue gas recovery system, comprising a flue gas recovery device, characterized in that: The flue gas recovery device comprises a flue (1) and a heating chamber (2); The flue (1) and the heating chamber (2) are connected via a plurality of superconducting heat pipes (3); The superconducting heat pipe (3) comprises a heat absorbing portion (301) arranged in the flue (1) and a heat dissipating portion (302) arranged in the heating chamber (2); A plurality of fins (303) are provided on the outer wall of the heat absorbing portion (301); The superconducting heat pipe (3) is filled with a superconducting working medium, and the superconducting working medium transfers the heat absorbed by the heat absorbing part (301) to the heat dissipating part (302) for heating the fluid in the heating chamber (2); The superconducting heat pipe (3) is rotatably mounted on the flue (1), and a bimetallic sheet (4) in contact with the fin (303) on the side close to the smoke inlet is provided in the flue (1); The superconducting heat pipe (3) is provided with a clutch (304) for driving the superconducting heat pipe (3) to rotate, the flue (1) is provided with a driving wheel (101) that matches the clutch (304), the clutch (304) is provided with a driving plate (305) connected to the bimetallic strip (4), and the driving plate (305) is connected to the bimetallic strip (4) via a driving rod (306).

2. The heat pump steam engine flue gas recovery system according to claim 1, characterized in that: The superconducting heat pipe (3) is a vacuum tube, and the superconducting working medium is liquid.

3. The heat pump steam engine flue gas recovery system according to claim 1, characterized in that: The fins (303) are evenly arranged radially on the outer wall of the heat absorption part (301).

4. The heat pump steam engine flue gas recovery system according to claim 1, characterized in that: The clutch (304) is provided with a first tooth portion (307), and the driving wheel (101) is provided with a second tooth portion (102) meshing with the first tooth portion (307).

5. The heat pump steam engine flue gas recovery system according to claim 4, characterized in that: The flue (1) is provided with a transmission box (103), the driving wheel (101) is rotatably arranged in the transmission box (103), a transmission belt (104) is arranged between adjacent driving wheels (101), the transmission box (103) is provided with a driving motor (105) for driving each driving wheel (101) to rotate, and the driving motor (105) is connected to any driving wheel (101) through a driving belt (106); Grating components (5) for detecting the rear slip clutch (304) are symmetrically provided on both sides of the transmission box (103), and the grating components (5) are electrically connected to the driving motor (105).

6. The heat pump steam engine flue gas recovery system according to claim 5, characterized in that: The driving plate (305) is sleeved on the clutch (304); a sensor (308) matching the clutch (304) is provided on the driving plate (305); and a sensing arm (309) for being sensed by the sensor (308) is provided on the clutch (304).

7. The heat pump steam engine flue gas recovery system according to claim 6, characterized in that: An electromagnet (310) for adsorbing the driving plate (305) is provided on the flue (1), and the electromagnet (310) is electrically connected to the sensor (308).

8. The heat pump steam engine flue gas recovery system according to claim 7, characterized in that: The superconducting heat pipe (3) is provided with a driving shaft (311) that matches with a clutch (304); the clutch (304) is slidably arranged on the driving shaft (311); a striking block (312) is provided on the clutch (304); and a hammer hole (313) that matches with the striking block (312) is provided at the end of the driving shaft (311).

9. The recovery process of the flue gas recovery system of the heat pump steam engine according to claim 1, characterized in that: The process is as follows: S1: high-temperature flue gas enters the flue (1) from the smoke inlet, and then the high-temperature flue gas contacts the fins (303) in the flue (1), transferring the heat of the flue gas to the heat dissipation part (302) through the superconducting working medium in the superconducting heat pipe (3), thereby heating the fluid in the heating chamber (2); S2: When the fin (303) on the side close to the smoke inlet reaches the deformation temperature of the bimetallic strip (4), the bimetallic strip (4) is deformed, and the driving plate (305) is driven to slide via the driving rod (306), so that the clutch (304) slides and meshes with the driving wheel (101); S3: After the clutch (304) slips, it is detected by the grating assembly (5), thereby starting the drive motor (105), driving the drive wheel (101) to rotate, and further causing the clutch (304) to rotate, thereby driving the superconducting heat pipe (3) to rotate; S4: The sensing arm (309) on the clutch (304) rotates 180° and is sensed by the sensor (308), thereby energizing the electromagnet (310) to attract the driving plate (305), causing the clutch (304) to be disengaged from the driving wheel (101). At the same time, the driving plate (305) slides to cause the driving rod (306) to press against the bimetallic strip (4), thereby causing the bimetallic strip (4) to reset and re-contact the fin (303) on the side close to the smoke inlet after the rotation, and then perform the next detection.

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