A gas-fired generator set with waste heat recovery

Abstract

The present invention relates to the field of waste gas recovery technology and gas-fired generator sets, specifically a waste gas waste heat recovery gas-fired generator set, including a power generation system and a waste heat recovery system; the power generation system includes a combustion chamber, the waste heat recovery system includes a recovery box, an exhaust pipe connected to the recovery box is fixedly installed on the combustion chamber; it also includes: a water injection pipe, the water injection pipe is vertically fixed and inserted on the top wall of the recovery box; a partition, the partition is fixedly installed in the recovery box between the exhaust pipe and the water injection pipe. The present invention causes the bracket to shake back and forth between the partition and the block under the action of a driving mechanism. In the process of the bracket driving the heat exchanger to shake, the condensed water on the surface of the heat exchanger slides onto the bottom wall of the heat exchanger under the action of inertia, so that the surface of the heat exchanger remains dry, thereby preventing the condensed water from absorbing the heat of the flue gas, thereby improving the heating rate.

Description

Technical Field

[0001] The present invention relates to the field of waste gas recovery technology and gas-fired generator sets, and in particular to a waste gas waste heat recovery gas-fired generator set. Background Art

[0002] Gas is a general term for gaseous fuels, which can be burned to release heat directly or indirectly (such as power generation, heating boilers, etc.), and are used by urban residents and industrial enterprises; and there are many types of gas, mainly landfill gas, biogas, natural gas, liquefied petroleum gas, etc.;

[0003] Since the main component of biogas is methane, and the products of methane combustion contain water, the flue gas generated when biogas is burned for power generation contains a large amount of water vapor. When the flue gas is used for waste heat utilization, the high-temperature flue gas contacts the low-temperature heat exchanger. At this time, the water vapor in the flue gas is cooled and liquefied into condensed water attached to the surface of the heat exchanger. The condensed water attached to the surface of the heat exchanger absorbs the heat of the flue gas when it contacts the flue gas again, and then evaporates again. In this process, the heat of the flue gas is absorbed by the condensed water and is not fully utilized, resulting in waste. In addition, the condensed water attached to the surface of the heat exchanger will prevent the flue gas from directly contacting the heat exchanger, resulting in reduced heat exchange efficiency.

[0004] Therefore, a gas-fired power generation unit with waste heat recovery from exhaust gas is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a gas-fired power generation unit for recovering waste heat from exhaust gas, so as to solve the problem in the above-mentioned background technology that water vapor in the flue gas is cooled and liquefied into condensed water, which adheres to the surface of the heat exchanger, causing the heat of the flue gas to be absorbed by the condensed water, and at the same time causing the flue gas to be unable to directly contact the heat exchanger, thereby causing waste of flue gas heat.

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

[0007] A waste heat recovery gas-fired power generation unit, comprising a power generation system and a waste heat recovery system;

[0008] The power generation system includes a combustion chamber, the waste heat recovery system includes a recovery box, and an exhaust pipe connected to the recovery box is fixedly installed on the combustion chamber;

[0009] Also includes:

[0010] An air outlet pipe, the air outlet pipe is horizontally fixed and inserted on the side wall of the recovery box, the air outlet pipe is located at the bottom of the side wall of the recovery box, and the air outlet pipe connects the recovery box with the outside world;

[0011] A water injection pipe, the water injection pipe is vertically fixed and inserted on the top wall of the recovery box;

[0012] A partition, the partition being fixedly installed in the recovery box at a position between the exhaust pipe and the water injection pipe;

[0013] A stopper, the stopper being fixedly mounted in the recovery box at a position below the partition;

[0014] A bracket, the bracket being movably arranged in the space between the stopper and the partition in the recovery box;

[0015] A heat exchanger, wherein the heat exchanger is fixedly mounted on a bracket, and a water inlet of the heat exchanger extends above the partition;

[0016] A hose, which is fixedly mounted on the drain port of the heat exchanger and extends to the outside;

[0017] A shaking mechanism is arranged on the recovery box, and the shaking mechanism cooperates with the bracket.

[0018] During the working process, the flue gas generated in the combustion chamber enters the space between the partition and the block in the recovery box along the exhaust pipe. Since the temperature of the flue gas entering the recovery box is relatively high, the flue gas first fills the space at the top of the recovery box and then gradually spreads downward. When the recovery box is full of flue gas, the flue gas at the bottom of the recovery box will be discharged to the outside from the exhaust pipe, so that the high-temperature flue gas discharged from the exhaust pipe can continue to enter the recovery box. At the same time, cold water is added to the water injection pipe. At this time, the cold water in the space above the partition in the recovery box enters the heat exchanger through the water inlet. The flue gas entering the recovery box contacts the heat exchanger. The cold water passes through the heat exchanger and then flows out from the hose. In this process, the cold water in the heat exchanger absorbs the heat of the flue gas under the action of heat exchange, thereby realizing the utilization of waste heat of the exhaust gas.

[0019] When the cold water in the heat exchanger is heated, the water vapor in the flue gas contacts the heat exchanger with a lower temperature. At this time, the water vapor is cooled and liquefied into small water droplets that adhere to the surface of the heat exchanger.

[0020] Under the action of the driving mechanism, the bracket shakes back and forth between the partition and the block. In the process of the bracket driving the heat exchanger to shake, the condensed water on the surface of the heat exchanger slides to the bottom wall of the heat exchanger under the action of inertia, so that the surface of the heat exchanger remains dry, thereby preventing the condensed water from absorbing the heat of the flue gas and playing a role in increasing the heating rate.

[0021] Preferably, the shaking mechanism includes a mounting rod fixedly mounted horizontally and rotatably in the recycling box, a cam fixedly mounted on the mounting rod, a box body fixedly mounted on the side wall of the recycling box, a motor fixedly mounted in the box body, and the first output end of the electrode extends into the recycling box and is fixedly connected to one end of the mounting rod.

[0022] During the working process, the motor is started. Since the first output end of the motor is fixedly connected to the mounting rod, the motor begins to drive the mounting rod to rotate. At this time, the mounting rod drives the cam to rotate. When the protrusion on the cam pushes the bracket upward, the bracket moves upward along the recycling box. Since the motor rotates at a fast speed, when the end of the protrusion rotates to the lowest position, the protrusion on the cam quickly disengages from the bracket. At this time, under the action of gravity, the bracket falls onto the surface of the block, and so on. The bracket moves up and down along the recycling box, thereby driving the bracket to shake.

[0023] Preferably, a plurality of cylindrical flow guide rods are vertically fixedly mounted on the bottom wall of the heat exchanger, and the diameter of the flow guide rods is 2-3 mm.

[0024] The water droplets that slide onto the bottom wall of the heat exchanger will flow onto the guide rod and quickly drip through the tiny bottom of the guide rod. Compared with the condensed water gathering into water droplets on the bottom wall of the heat exchanger and then dripping, this shortens the time it takes for the condensed water to leave the heat exchanger, thereby playing a role in drying the surface of the heat exchanger in time.

[0025] Preferably, a guide plate cooperating with the guide rod is horizontally fixedly installed on the inner wall of the bracket, a guide groove is provided on the guide plate, a water cavity is provided on the bracket, a connecting pipe extending into the water cavity is fixedly installed in each of the guide grooves, a negative pressure box is fixedly installed on the top wall of the box body, a telescopic tube extending into the negative pressure box is fixedly installed at the bottom end of the water cavity, and a negative pressure mechanism cooperating with the negative pressure box is provided on the box body.

[0026] When condensed water drips from the bottom end of the guide rod into the guide groove, the condensed water flows along the guide groove into the water pipe and then enters the water cavity. Since the negative pressure box is in a negative pressure state, the condensed water in the water cavity enters the negative pressure box through the telescopic tube, thereby being able to transfer the condensed water in the water cavity in time, ensuring that the condensed water can enter the water cavity normally.

[0027] Preferably, a rubber sheet is fixedly mounted on the upper portion of the guide groove, a plug hole cooperating with the guide rod is provided on the rubber sheet, and the rubber rod is movably inserted in the plug hole.

[0028] The condensed water flowing along the guide rod is attached to the connection between the guide rod and the socket. Under the action of the negative pressure box, the water cavity is in a negative pressure state. Since the water cavity is connected to the guide groove through the water pipe, the guide groove is also in a negative pressure state. Therefore, the guide groove absorbs air through the gap between the guide rod and the socket. At this time, the water droplets attached to the guide rod and the socket are absorbed into the guide groove. Under the action of the rubber sheet, the condensed water entering the guide groove cannot come into contact with the flue gas in the recovery box, which plays a role in improving the heat utilization rate of the flue gas.

[0029] Preferably, the negative pressure mechanism includes a pressure plate movably arranged in the box body, and a first airbag and a second airbag are fixedly installed between the side walls on the left and right sides of the pressure plate and the inner wall of the box body respectively, and a first one-way valve that can only allow air to enter and a second one-way valve that can only allow air to enter are fixedly installed on the air inlet and exhaust ports of the first airbag and the second airbag, and an air inlet pipe extending into the negative pressure box is fixedly installed on each of the first one-way valves, and a reciprocating mechanism for driving the pressure plate to move is provided in the box body.

[0030] Under the action of the reciprocating mechanism, the pressure plate reciprocates along the box body, and when the pressure plate approaches the first airbag along the box body, the first airbag is squeezed and the gas therein is discharged through the second one-way valve on the first airbag. At this time, the second airbag is stretched, and the second airbag is in a negative pressure state. Therefore, the second airbag draws air from the negative pressure box through the first one-way valve on its own air inlet and the air inlet pipe on the first one-way valve, thereby making the negative pressure box in a negative pressure state; when the pressure plate approaches the second airbag, the second airbag is squeezed, and the gas therein is discharged through the second one-way valve on the second airbag. At this time, the first airbag is stretched, and the first airbag is in a negative pressure state. Therefore, the first airbag draws air from the negative pressure box through the first one-way valve on its air inlet and the air inlet pipe on the first one-way valve. Therefore, when the pressure plate reciprocates, the negative pressure box exhausts air to the outside, thereby maintaining a negative pressure state in the negative pressure box.

[0031] Preferably, the reciprocating mechanism comprises a reciprocating screw fixedly mounted on the second output end of the motor, a screw hole is provided on the pressing plate, and the pressing plate is spirally connected to the reciprocating screw via the screw hole.

[0032] The motor drives the reciprocating screw to rotate during operation. Since the pressure plate is connected to the reciprocating screw by a spiral transmission, when the reciprocating screw rotates, the pressure plate reciprocates along the reciprocating screw, thereby driving the pressure plate to reciprocate.

[0033] Preferably, a guide rod is horizontally fixedly installed in the box body, and the guide rod passes through the pressure plate.

[0034] Since the guide rod passes through the pressure plate, the pressure plate can only move along the guide rod. Therefore, during the rotation of the reciprocating screw, the pressure plate can only translate along the reciprocating screw, which prevents the pressure plate from rotating with the reciprocating screw.

[0035] Preferably, a rubber pad is fixedly mounted on the top wall of the stopper.

[0036] By installing a rubber pad on the top wall of the stopper, a buffering effect can be achieved when the bracket falls, thereby reducing the impact force on the bracket and reducing the degree of wear on the bracket.

[0037] Preferably, the surface of the guide rod is coated with polycarbonate coating.

[0038] Since the polycarbonate material has good hydrophobic properties, the condensed water on the surface of the guide rod can slide down quickly, which plays a role in accelerating the dripping speed of the condensed water.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. Under the action of the driving mechanism, the bracket shakes back and forth between the partition and the block. In the process of the bracket driving the heat exchanger to shake, the condensed water on the surface of the heat exchanger slides to the bottom wall of the heat exchanger under the action of inertia, so that the surface of the heat exchanger remains dry, thereby preventing the condensed water from absorbing the heat of the flue gas and playing a role in increasing the heating rate.

[0041] 2. When the condensed water drips from the bottom end of the guide rod into the guide groove, the condensed water flows along the guide groove into the water pipe and then enters the water cavity. Since the negative pressure box is in a negative pressure state, the condensed water in the water cavity enters the negative pressure box through the telescopic tube, thereby being able to transfer the condensed water in the water cavity in time, thereby ensuring that the condensed water can enter the water cavity normally.

[0042] 3. The water droplets attached to the guide rod and the socket are absorbed into the guide groove. Under the action of the rubber sheet, the condensed water entering the guide groove cannot contact the flue gas in the recovery box, which plays a role in improving the heat utilization rate of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 is a cross-sectional view of the recycling box of the present invention;

[0045] Figure 3 It is an enlarged view of A of the present invention;

[0046] Figure 4 It is an enlarged view of B of the present invention;

[0047] Figure 5 It is an enlarged view of the C portion of the present invention;

[0048] Figure 6 It is a cross-sectional view of DD of the present invention;

[0049] Figure 7 It is a combined diagram of the heat exchanger, guide rod and guide plate of the present invention;

[0050] Figure 8 It is a combined diagram of the heat exchanger and the bracket of the present invention;

[0051] Fig. 9 It is a combined diagram of the heat exchanger and the bracket hose of the present invention.

[0052] In the figure: 1. combustion chamber; 2. recovery box; 3. exhaust pipe; 4. water injection pipe; 5. partition; 6. block; 7. bracket; 8. heat exchanger; 9. hose; 10. mounting rod; 11. cam; 12. guide rod; 13. guide plate; 14. connecting pipe; 15. negative pressure box; 16. telescopic tube; 17. rubber sheet; 18. pressure plate; 19. first air bag; 20. second air bag; 21. first non-return valve; 22. second non-return valve; 23. intake pipe; 24. reciprocating screw; 25. guide rod; 26. rubber pad; 27. motor; 28. box; 29. ​​guide groove; 30 water cavity; 31. exhaust pipe. DETAILED DESCRIPTION

[0053] 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.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0055] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The embodiment of the present invention provides a gas-fired power generation unit for recovering waste heat from exhaust gas, thereby solving the technical problem that when an existing gas-fired power generation unit generates electricity using methane, the flue gas generated contains water vapor, and when the waste heat of the flue gas is recovered, the water vapor liquefies and adheres to the surface of the heat exchanger, and then the condensed water absorbs the heat of the flue gas, resulting in waste of the heat of the flue gas.

[0057] The technical solution in the embodiment of the present invention is to solve the above technical problems. The overall idea is as follows: by shaking the heat exchanger up and down, the condensed water on the surface of the heat exchanger will slide down to the bottom wall of the heat exchanger under the action of gravity during the shaking process, so that most of the surface area of ​​the heat exchanger remains dry, thereby ensuring that the heat of the flue gas is absorbed by the heat exchanger, improving the heat utilization rate of the flue gas, and at the same time, the condensed water sliding down to the bottom wall of the heat exchanger flows along the guide rod into the guide groove, and then flows into the negative pressure box, so that the condensed water can be transferred in time, shortening the contact time between the condensed water and the flue gas;

[0058] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0059] See also Figures 1 to 9 The present invention provides a waste heat recovery gas generator set, the technical solution is as follows:

[0060] A gas-fired power generation unit with waste heat recovery from exhaust gas, comprising:

[0061] Power generation system and waste heat recovery system;

[0062] The power generation system includes a combustion chamber 1, the waste heat recovery system includes a recovery box 2, and an exhaust pipe 3 connected to the recovery box 2 is fixedly installed on the combustion chamber 1;

[0063] Also includes:

[0064] An air outlet pipe is horizontally fixed and inserted on the side wall of the recovery box. The air outlet pipe is located at the bottom of the side wall of the recovery box, and the air outlet pipe connects the recovery box with the outside world;

[0065] A water injection pipe 4, which is vertically fixed and inserted on the top wall of the recovery box 2;

[0066] The partition 5 is fixedly installed in the recovery box 2 between the exhaust pipe 3 and the water injection pipe 4;

[0067] A stopper 6, which is fixedly mounted in the recovery box 2 at a position below the partition 5;

[0068] A bracket 7, the bracket 7 is movably arranged in the recovery box 2 in the space between the stopper 6 and the partition 5;

[0069] The heat exchanger 8 is fixedly mounted on the bracket 7, and the water inlet of the heat exchanger 8 extends to the top of the partition 5;

[0070] A hose 9, which is fixedly mounted on the drain outlet of the heat exchanger 8 and extends to the outside;

[0071] The shaking mechanism is arranged on the recovery box 2 , and the shaking mechanism cooperates with the bracket 7 .

[0072] During operation, the flue gas generated in the combustion chamber 1 enters the space between the partition 5 and the block 6 in the recovery box 2 along the exhaust pipe 3. Since the temperature of the flue gas entering the recovery box 2 is relatively high, the flue gas first fills the space at the top of the recovery box 2 and then gradually spreads downward. When the recovery box 2 is full of flue gas, the flue gas at the bottom of the recovery box 2 will be discharged to the outside from the exhaust pipe 31, so that the high-temperature flue gas discharged from the exhaust pipe 3 can continue to enter the recovery box 2. At the same time, cold water is added to the water injection pipe 4. At this time, the cold water in the space above the partition 5 in the recovery box 2 enters the heat exchanger 8 through the water inlet. The flue gas entering the recovery box 2 contacts the heat exchanger 8. The cold water passes through the heat exchanger 8 and then flows out from the hose 9. In this process, the cold water in the heat exchanger 8 absorbs the heat of the flue gas under the action of heat exchange, thereby realizing the utilization of the waste heat of the exhaust gas.

[0073] When the cold water in the heat exchanger 8 is heated, the water vapor in the flue gas contacts the heat exchanger 8 with a lower temperature. At this time, the water vapor is cooled and liquefied into small water droplets that adhere to the surface of the heat exchanger 8 .

[0074] Under the action of the driving mechanism, the bracket 7 shakes back and forth between the partition 5 and the block 6. In the process of the bracket 7 driving the heat exchanger 8 to shake, the condensed water on the surface of the heat exchanger 8 slides to the bottom wall of the heat exchanger 8 under the action of inertia, so that the surface of the heat exchanger 8 remains dry, thereby preventing the condensed water from absorbing the heat of the flue gas, thereby playing a role in increasing the heating rate.

[0075] As an embodiment of the present invention, refer to Figure 2 , Figure 4 The shaking mechanism includes a mounting rod 10 which is fixedly and horizontally rotatably installed in the recovery box 2, a cam 11 is fixedly installed on the mounting rod 10, a box body 28 is fixedly installed on the side wall of the recovery box 2, a motor 27 is fixedly installed in the box body 28, and the first output end of the electrode extends into the recovery box 2 and is fixedly connected to one end of the mounting rod 10.

[0076] During the working process, the motor 27 is started. Since the first output end of the motor 27 is fixedly connected to the mounting rod 10, the motor 27 begins to drive the mounting rod 10 to rotate. At this time, the mounting rod 10 drives the cam 11 to rotate. When the protrusion on the cam 11 pushes the bracket 7 upward, the bracket 7 moves upward along the recycling box 2. Since the rotation speed of the motor 27 is relatively fast, when the end of the protrusion rotates to the lowest position, the protrusion on the cam 11 quickly breaks away from the contact with the bracket 7. At this time, under the action of gravity, the bracket 7 falls to the surface of the block 6, and so on. The bracket 7 moves up and down along the recycling box 2, thereby driving the bracket 7 to shake.

[0077] As an embodiment of the present invention, refer to Figure 2 , Figure 5 , Figure 7 A plurality of cylindrical flow guide rods 12 are vertically fixedly mounted on the bottom wall of the heat exchanger 8, and the diameter of the flow guide rods 12 is 2-3 mm.

[0078] The water droplets that slide onto the bottom wall of the heat exchanger 8 will flow onto the guide rod 12. Since the adsorption force between the water droplets and the bottom end of the guide rod 12 is positively correlated with the contact area between the water droplets and the guide rod 12, when the diameter of the guide rod 12 is small, the adsorption force between the water droplets that slide to the bottom end of the guide rod 12 and the guide rod 12 is small, and the water droplets at the bottom end of the guide rod 12 gradually become larger. Therefore, when the gravity of the water droplets is greater than the adsorption force between the water droplets and the guide rod 12, the water droplets at the bottom end of the guide rod 12 will drip quickly. Compared with the condensed water gathering into water droplets on the bottom wall of the heat exchanger 8 and then dripping, the time for the condensed water to leave the heat exchanger 8 is shortened, thereby achieving the effect of drying the surface of the heat exchanger 8 in time.

[0079] As an embodiment of the present invention, refer to Figure 2 , Figure 4 , Figure 5 , Figure 7 A guide plate 13 cooperating with the guide rod 12 is horizontally fixedly installed on the inner wall of the bracket 7, a guide groove 29 is opened on the guide plate 13, a water cavity 30 is opened on the bracket 7, a connecting pipe 14 extending into the water cavity 30 is fixedly installed in each guide groove 29, a negative pressure box 15 is fixedly installed on the top wall of the box body 28, a telescopic tube 16 extending into the negative pressure box 15 is fixedly installed at the bottom end of the water cavity 30, and a negative pressure mechanism cooperating with the negative pressure box 15 is provided on the box body 28.

[0080] When condensed water drips from the bottom end of the guide rod 12 into the guide groove 29, the condensed water flows along the guide groove 29 into the water pipe, and then enters the water chamber 30. Since the negative pressure box 15 is in a negative pressure state, the condensed water in the water chamber 30 enters the negative pressure box 15 through the telescopic tube 16, so that the condensed water in the water chamber 30 can be transferred in time, thereby ensuring that the condensed water can enter the water chamber 30 normally.

[0081] As an embodiment of the present invention, refer to Figure 7 A rubber sheet 17 is fixedly installed on the upper part of the guide groove 29. The rubber sheet 17 is provided with a plug hole that matches the guide rod 12, and the rubber rod is movably inserted in the plug hole.

[0082] The condensed water flowing along the guide rod 12 adheres to the connection between the guide rod 12 and the socket. Under the action of the negative pressure box 15, the water chamber 30 is in a negative pressure state. Since the water chamber 30 is connected to the guide groove 29 through the water pipe, the guide groove 29 is also in a negative pressure state. Therefore, the guide groove 29 inhales air through the gap between the guide rod 12 and the socket. At this time, the water droplets attached to the guide rod 12 and the socket are absorbed into the guide groove 29. Under the action of the rubber sheet 17, the condensed water entering the guide groove 29 cannot contact the flue gas in the recovery box 2, thereby improving the heat utilization rate of the flue gas.

[0083] As an embodiment of the present invention, refer to Figure 2 The negative pressure mechanism includes a pressure plate 18 movably arranged in a box body 28, and a first airbag 19 and a second airbag 20 are fixedly installed between the side walls on the left and right sides of the pressure plate 18 and the inner wall of the box body 28 respectively, and a first one-way valve 21 that can only allow air to enter and a second one-way valve 22 that can only allow air to enter are fixedly installed on the air inlet and exhaust ports of the first airbag 19 and the second airbag 20, and an air inlet pipe 23 extending into the negative pressure box 15 is fixedly installed on each first one-way valve 21, and a reciprocating mechanism for driving the pressure plate 18 to move is provided in the box body 28.

[0084] Under the action of the reciprocating mechanism, the pressing plate 18 reciprocates along the box body 28. When the pressing plate 18 approaches the first airbag 19 along the box body 28, the first airbag 19 is squeezed, and the gas therein is discharged through the second one-way valve 22 on the first airbag 19. At this time, the second airbag 20 is stretched, and the second airbag 20 is in a negative pressure state. Therefore, the second airbag 20 inhales air from the negative pressure box 15 through the first one-way valve 21 on its own air inlet and the air inlet pipe 23 on the first one-way valve 21, so that the negative pressure box 15 is in a negative pressure state; when the pressing plate 18 is close to the first airbag 19 along the box body 28, the first airbag 19 is squeezed, and the gas therein is discharged through the second one-way valve 22 on the first airbag 19. At this time, the second airbag 20 is stretched, and the second airbag 20 is in a negative pressure state. Therefore, the second airbag 20 inhales air from the negative pressure box 15 through the first one-way valve 21 on its own air inlet and the air inlet pipe 23 on the first one-way valve 21, so that the negative pressure box 15 is in a negative pressure state; When the pressure plate 18 approaches the second airbag 20, the second airbag 20 is squeezed. At this time, the gas in the second airbag 20 is discharged through the second one-way valve 22 on the second airbag 20. At this time, the first airbag 19 is stretched, and the first airbag 19 is in a negative pressure state. Therefore, the first airbag 19 inhales air from the negative pressure box 15 through the first one-way valve 21 on its air inlet and the air inlet pipe 23 on the first one-way valve 21. Therefore, when the pressure plate 18 makes a reciprocating motion, the negative pressure box 15 exhausts air to the outside, thereby maintaining the negative pressure state in the negative pressure box 15.

[0085] As an embodiment of the present invention, refer to Figure 2The reciprocating mechanism includes a reciprocating screw rod 24 fixedly mounted on the second output end of the motor 27, and a screw hole is opened on the pressing plate 18, and the pressing plate 18 is spirally connected to the reciprocating screw rod 24 through the screw hole.

[0086] The motor 27 drives the reciprocating screw 24 to rotate during operation. Since the pressure plate 18 is connected to the reciprocating screw 24 by a spiral transmission, when the reciprocating screw 24 rotates, the pressure plate 18 reciprocates along the reciprocating screw 24, thereby driving the pressure plate 18 to reciprocate.

[0087] As an embodiment of the present invention, refer to Figure 2 A guide rod 25 is horizontally fixedly installed in the box body 28, and the guide rod 25 passes through the pressing plate 18.

[0088] Since the guide rod 25 passes through the pressure plate 18 , the pressure plate 18 can only move along the guide rod 25 . Therefore, during the rotation of the reciprocating screw 24 , the pressure plate 18 can only translate along the reciprocating screw 24 , thereby preventing the pressure plate 18 from rotating with the reciprocating screw 24 .

[0089] As an embodiment of the present invention, refer to Figure 4 A rubber pad 26 is fixedly mounted on the top wall of the stopper 6 .

[0090] By installing the rubber pad 26 on the top wall of the stopper 6 , a buffering effect can be achieved when the bracket 7 falls, thereby reducing the impact force on the bracket 7 and reducing the degree of wear of the bracket 7 .

[0091] As an embodiment of the present invention, refer to Figure 5 , Figure 7 The surface of the guide rod 12 is coated with polycarbonate paint.

[0092] Since the polycarbonate material has good hydrophobic properties, the condensed water on the surface of the guide rod 12 can slide down quickly, which plays a role in accelerating the dripping speed of the condensed water.

[0093] Working principle: During the working process, the flue gas generated in the combustion chamber 1 enters the space between the partition 5 and the block 6 in the recovery box 2 along the exhaust pipe 3, and at the same time, cold water is added to the water injection pipe 4. At this time, the cold water in the space above the partition 5 in the recovery box 2 enters the heat exchanger 8 through the water inlet. The flue gas entering the recovery box 2 contacts the heat exchanger 8. The cold water passes through the heat exchanger 8 and then flows out from the hose 9. In this process, the cold water in the heat exchanger 8 absorbs the heat of the flue gas under the action of heat exchange, thereby realizing the waste heat utilization of the exhaust gas.

[0094] When the cold water in the heat exchanger 8 is heated, the water vapor in the flue gas contacts the heat exchanger 8 with a lower temperature. At this time, the water vapor is cooled and liquefied into small water droplets that adhere to the surface of the heat exchanger 8 .

[0095] Under the action of the driving mechanism, the bracket 7 shakes back and forth between the partition 5 and the block 6. In the process of the bracket 7 driving the heat exchanger 8 to shake, the condensed water on the surface of the heat exchanger 8 slides to the bottom wall of the heat exchanger 8 under the action of inertia, so that the surface of the heat exchanger 8 remains dry, thereby preventing the condensed water from absorbing the heat of the flue gas. The condensed water flowing along the guide rod 12 adheres to the connection between the guide rod 12 and the socket. Under the action of the negative pressure box 15, the water chamber 30 is in a negative pressure state. Since the water chamber 30 is connected to the guide groove 29 through the water pipe, the guide groove 29 is also in a negative pressure state. Therefore, the guide groove 29 inhales air through the gap between the guide rod 12 and the socket. At this time, the water droplets attached to the guide rod 12 and the socket are absorbed into the guide groove 29. Under the action of the rubber sheet 17, the condensed water entering the guide groove 29 cannot contact the flue gas in the recovery box 2, which plays a role in improving the utilization rate of the flue gas heat.

[0096] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the technical solution according to the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more matching and consistent with the technical solution of the present invention. It is a technical solution for the best application of the technical solution. The model of its product can be replaced and modified according to the required technical parameters, which is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0097] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery gas-fired power generation unit, comprising a power generation system and a waste heat recovery system; the power generation system comprises a combustion chamber (1), the waste heat recovery system comprises a recovery box (2), an exhaust pipe (3) connected to the recovery box (2) is fixedly mounted on the combustion chamber (1); the characteristics are: Also includes: An air outlet pipe (31), the air outlet pipe (31) is horizontally fixedly inserted on the side wall of the recovery box (2), the air outlet pipe (31) is located at the bottom of the side wall of the recovery box, and the air outlet pipe (31) connects the recovery box (2) with the outside; a water injection pipe (4), the water injection pipe (4) is vertically fixedly inserted on the top wall of the recovery box (2); a partition (5), the partition (5) is fixedly installed in the recovery box (2) at a position between the exhaust pipe (3) and the water injection pipe (4); a block (6), the block (6) is fixedly installed in the recovery box (2) A portion located below the partition (5); a bracket (7), the bracket (7) being movably arranged in the space between the stopper (6) and the partition (5) in the recovery box (2); a heat exchanger (8), the heat exchanger (8) being fixedly mounted on the bracket (7), the water inlet of the heat exchanger (8) extending to the top of the partition (5); a hose (9), the hose (9) being fixedly mounted on the drain outlet of the heat exchanger (8) and extending to the outside; a shaking mechanism, the shaking mechanism being arranged on the recovery box (2), and the shaking mechanism being coordinated with the bracket (7); The shaking mechanism comprises a mounting rod (10) fixedly mounted in a horizontal rotation in the recovery box (2), a cam (11) fixedly mounted on the mounting rod (10), a box body (28) fixedly mounted on the side wall of the recovery box (2), a motor (27) fixedly mounted in the box body (28), a first output end of the motor extending into the recovery box (2) and fixedly connected to one end of the mounting rod (10); A plurality of cylindrical flow guide rods (12) are vertically fixedly mounted on the bottom wall of the heat exchanger (8), and the diameter of the flow guide rods (12) is 2-3 mm; A guide plate (13) cooperating with the guide rod (12) is fixedly mounted horizontally on the inner wall of the bracket (7); a guide groove (29) is provided on the guide plate (13); a rubber sheet (17) is fixedly mounted on the upper part of the guide groove (29); a plug hole cooperating with the guide rod (12) is provided on the rubber sheet (17); the guide rod (12) is movably inserted into the plug hole; Under the action of the shaking mechanism, the bracket (7) shakes back and forth between the partition (5) and the stopper (6). In the process of the bracket (7) driving the heat exchanger (8) to shake, the condensed water on the surface of the heat exchanger (8) slides down to the bottom wall of the heat exchanger (8) under the action of inertia, so that the surface of the heat exchanger (8) remains dry, thereby preventing the condensed water from absorbing the heat of the flue gas. The condensed water flowing along the guide rod (12) adheres to the connection between the guide rod (12) and the plug hole, and under the action of the negative pressure box (15), the condensed water in the water chamber (30) The water chamber (30) is in a negative pressure state. Since the water chamber (30) is connected to the guide groove (29) through the water pipe, the guide groove (29) is also in a negative pressure state. Therefore, the guide groove (29) absorbs air through the gap between the guide rod (12) and the plug hole. At this time, water droplets attached to the gap between the guide rod (12) and the plug hole are absorbed into the guide groove (29). Under the action of the rubber sheet (17), the condensed water entering the guide groove (29) cannot contact the flue gas in the recovery box (2), thereby improving the heat utilization rate of the flue gas.

2. The exhaust gas waste heat recovery gas generator set according to claim 1, characterized in that: The bracket (7) is provided with a water cavity (30), each of the guide grooves (29) is fixedly provided with a connecting pipe (14) extending into the water cavity (30), a negative pressure box (15) is fixedly provided on the top wall of the box body (28), a telescopic tube (16) extending into the negative pressure box (15) is fixedly provided at the bottom end of the water cavity (30), and a negative pressure mechanism cooperating with the negative pressure box (15) is provided on the box body (28).

3. The exhaust gas waste heat recovery gas generator set according to claim 2 is characterized in that: The negative pressure mechanism comprises a pressure plate (18) movably arranged in a box body (28), a first air bag (19) and a second air bag (20) are respectively fixedly installed between the side walls on the left and right sides of the pressure plate (18) and the inner wall of the box body (28), a first one-way valve (21) that can only allow air to enter and a second one-way valve (22) that can only allow air to enter are fixedly installed on the air inlet and exhaust ports of the first air bag (19) and the second air bag (20), an air inlet pipe (23) that extends into the negative pressure box (15) is fixedly installed on each of the first one-way valves (21), and a reciprocating mechanism that drives the pressure plate (18) to move is provided in the box body (28).

4. The exhaust gas waste heat recovery gas generator set according to claim 3 is characterized in that: The reciprocating mechanism comprises a reciprocating screw (24) fixedly mounted on the second output end of the motor (27); a screw hole is provided on the pressing plate (18); and the pressing plate (18) is connected to the reciprocating screw (24) in a spiral transmission manner through the screw hole.

5. The exhaust gas waste heat recovery gas generator set according to claim 4 is characterized in that: A guide rod (25) is fixedly installed horizontally in the box body (28), and the guide rod (25) passes through the pressure plate (18).

6. The exhaust gas waste heat recovery gas generator set according to claim 1, characterized in that: A rubber pad (26) is fixedly mounted on the top wall of the stopper (6).

7. The exhaust gas waste heat recovery gas generator set according to claim 1, characterized in that: The surface of the guide rod (12) is coated with polycarbonate paint.

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