A power plant waste heat recovery device based on absorption heat pump

Abstract

The utility model relates to the field of electric power technology, and discloses a waste heat recovery device for a power plant based on an absorption heat pump, comprising a recovery tank; an air duct and a water duct are arranged inside the recovery tank, and the air duct is located inside the water duct; the waste heat recovery device for a power plant based on the absorption heat pump can increase the contact time between cooling water and high-temperature exhaust gas by installing the cooperation of the water duct and the air duct, so that the high-temperature exhaust gas can be uniformly absorbed, and the water flow can be made to flow in a vortex shape by the cooperation of a stirring plate, so that the water flow can be uniformly contacted with the water duct, and the cooperation of a circulating water pump can make the cooling water with a higher temperature flow back into the recovery pipe, accelerate the heat absorption speed and enable the cooling water to heat up quickly, and the nitrogen oxide control agent can be sprayed during the rotation of the atomizing nozzle by installing the atomizing nozzle, and the cooperation with the mixing plate can make the atomizing nozzle uniformly contact with the exhaust gas in the purification tank, thereby improving the treatment efficiency of the exhaust gas.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power, in particular to a power plant waste heat recovery device based on an absorption heat pump. Background Art

[0002] The power sector refers to the industrial field of production, transmission and distribution of electric energy. It covers a wide range of activities and facilities. The definition of the power industry includes the whole process from converting energy into electric energy to delivering electric energy to end users. It is the key support for the operation of modern society and ensures the normal operation of industry, commerce and residents' lives.

[0003] The existing patent (publication number: CN208223264U) discloses a waste heat recovery device for a power plant based on an absorption heat pump, including a base, cooling water and a neutralizing chemical liquid. The upper surface of the base is fixed with a fixing frame by bolts near both sides, and the tops of the two fixing frames are respectively fixed with a gas treatment tank and a cooling treatment tank. The interior of the cooling treatment tank is fixed with an exhaust pipe by bolts. The outer wall of the cooling treatment tank is welded with an outlet pipe and an inlet pipe near the top and the bottom, respectively, and a solenoid valve is provided in the middle of the outlet pipe and the inlet pipe. The top of the cooling treatment tank is provided with a screw hole, and an exhaust pipe is fixed in the screw hole. A Z-shaped transfer pipe is connected between the gas treatment tank and the cooling treatment tank. The utility model increases the contact area between the outer wall of the high-temperature exhaust pipe and the cooling water, reasonably utilizes the limited tank space, increases the contact area with the gas in the chemical liquid pool of the same volume, and improves the reaction efficiency.

[0004] During use of the above document, the threaded exhaust pipe can prolong the time for absorbing heat from high-temperature exhaust gas, but the cooling will be in a static state, which will lead to slower temperature transfer and lower efficiency. At the same time, the exhaust gas treatment still needs to be improved. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a power plant waste heat recovery device based on an absorption heat pump, which has the advantages of improving the heat recovery efficiency and the exhaust gas purification efficiency, and solves the problems raised in the background technology.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model provides the following technical solutions: a power plant waste heat recovery device based on an absorption heat pump, comprising a recovery tank; an air duct and a water duct are arranged inside the recovery tank, and the air duct is located inside the water duct;

[0009] The inner bottom wall of the recovery tank is rotatably connected to a rotating rod, and the outer surface of the rotating rod is fixedly connected to a plurality of stirring plates distributed in a circumference, and the bottom end of the water diversion pipe is located in the recovery tank;

[0010] A purification tank is placed on the right side of the recovery tank. The inner bottom wall of the purification tank is rotatably connected to a rotating tube. A plurality of circumferentially distributed atomizing nozzles are installed on the outer surface of the rotating tube. A plurality of circumferentially distributed mixing plates are fixedly connected to the outer surface of the rotating tube.

[0011] In some embodiments, two return pipes are installed on the outer surface of the recovery tank, and a circulating water pump is installed on the outer surface of the recovery tank. The two return pipes are fixedly connected to the output end and the input end of the circulating water pump respectively. The return pipe located above is fixedly connected to the water diversion pipe, and the return pipe located below is fixedly connected to the recovery tank. The installation of the circulating water pump can extract water in the water diversion pipe and transport it to the water flow tank, so that the water with higher temperature in the water diversion pipe is mixed with the cold water in the recovery tank, thereby increasing the heating rate of the cooling water in the recovery pipe and facilitating its recycling.

[0012] In some embodiments, the outer surface of the recovery tank is fixedly connected to a drain pipe, and a valve is installed on the outer surface of the drain pipe. The installed valve can close the bottom end of the recovery tank, and the heated cooling water in the recovery tank can be discharged by opening the valve.

[0013] In some embodiments, the upper end of the recovery tank is fixedly connected to a water inlet pipe, and the bottom end of the recovery tank is installed with an air inlet pipe. The air inlet pipe completely penetrates the water duct and is fixedly connected to the air duct. The external exhaust gas enters the air duct through the air inlet pipe. When the cooling water in the water duct circulates in the water duct, it can take away the heat of the high-temperature exhaust gas in the air duct.

[0014] In some embodiments, the outer surface of the purification tank is fixedly connected to an air pipe, the other end of the air pipe passes through the recovery tank and is connected to the water pipe and the air pipe, and a one-way valve is installed on the outer surface of the air pipe. The installation of the one-way valve can allow the exhaust gas to enter the purification tank through the air pipe to prevent the exhaust gas from flowing back.

[0015] In some embodiments, the bottom ends of the rotating rod and the rotating tube are fixedly connected with pulleys, and the two pulleys are connected by belt transmission. The bottom end of the rotating rod is fixedly connected to the output end of the external motor. The cooperation between the installed pulley and the belt can drive the rotating tube to rotate during the rotation of the rotating rod, so that the rotating tube can drive multiple atomizing nozzles to rotate, so that it can evenly spray the nitrogen oxide control agent in the purification tank.

[0016] In some embodiments, an infusion tube is installed at the upper end of the purification tank, and the infusion tube is rotatably connected to the rotating tube. The installation of the infusion tube can input nitrogen oxide control agent into the rotating tube, so that the nitrogen oxide control agent can be sprayed out from multiple atomizing nozzles.

[0017] In some embodiments, an activated carbon plate is installed inside the purification tank, and the infusion tube completely penetrates the activated carbon plate. The upper end of the purification tank is fixedly connected to an exhaust pipe. The installation of the activated carbon plate can adsorb harmful substances in the exhaust gas, further filter the exhaust gas, and improve the purification effect of the exhaust gas.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the utility model provides a power plant waste heat recovery device based on an absorption heat pump, which has the following beneficial effects:

[0020] 1. The waste heat recovery device of the power plant based on the absorption heat pump can increase the contact time between the cooling water and the high-temperature exhaust gas by installing the cooperation of the water inlet pipe and the air inlet pipe, so that the high-temperature exhaust gas can be evenly absorbed by the heat, and the water flow can be made to flow in a vortex shape by the cooperation of the stirring plate, so that it can evenly contact the water inlet pipe, and the cooperation of the circulating water pump can make the higher temperature cooling water flow back into the recovery pipe, so that it is evenly mixed with the cooling water, thereby accelerating the heat absorption speed and making the cooling water able to heat up quickly.

[0021] 2. The power plant waste heat recovery device based on the absorption heat pump can spray nitrogen oxide control agent during its rotation by installing an atomizing nozzle, and cooperate with the mixing plate to make it contact evenly with the exhaust gas in the purification tank, thereby improving the treatment efficiency of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the front view of the recovery tank of the utility model;

[0023] Figure 2 It is a sectional view of the left side view of the recovery tank of the utility model;

[0024] Figure 3 This is a front view of the recovery tank of the utility model;

[0025] Figure 4 This is a rear view of the recovery tank of the utility model.

[0026] In the figure:

[0027] 1. Recovery tank; 2. Air pipe; 3. Water pipe; 4. Rotating rod; 5. Stirring plate; 6. Purification tank; 7. Rotating pipe; 8. Atomizing nozzle; 9. Mixing plate; 10. Reflux pipe; 12. Circulating water pump; 13. Drain pipe; 14. Valve; 15. Water inlet pipe; 16. Air inlet pipe; 17. Air pipe; 18. One-way valve; 19. Pulley; 20. Liquid infusion pipe; 21. Activated carbon plate; 22. Exhaust pipe. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0032] In order to solve the problems in the related art to a certain extent, the embodiment of the present application provides a waste heat recovery device of a power plant based on an absorption heat pump. First, the high-temperature exhaust gas enters the air inlet pipe 2 through the air inlet pipe 16. At this time, the circulating water pump 12 is started and the cooling water in the recovery tank 1 is extracted through the return pipe 10 and the water inlet pipe 3. During the transportation of the high-temperature exhaust gas in the air inlet pipe 2, the cooling water flows in the water inlet pipe 3, thereby increasing the contact time between the cooling water and the high-temperature exhaust gas, so that the temperature can be quickly transferred. At this time, the external motor starts the rotating rod 4 to rotate, so that the rotating rod 4 and the stirring plate 5 cooperate to stir the cooling water in the recovery tank 1, so that it can flow in a vortex shape, so that the cooling water can fully contact with the water inlet pipe 3 during the flow and absorb the temperature in the water inlet pipe 3, and cooperate with the circulating water pump 12 to make the higher temperature cooling water flow back to the recovery tank 1, so that it is evenly mixed with the cooling water, thereby accelerating the heat absorption speed and making the cooling water The temperature can be raised quickly enough. When the temperature of the cooling water rises, it is discharged through the drain pipe 13 and the cooling water with lower temperature is injected into the recovery tank 1 through the water inlet pipe 15, so that the recovery tank 1 can maintain high efficiency. The exhaust gas after flowing in the air duct 2 can enter the purification tank 6 through the air pipe 17. At this time, the external nitrogen oxide control agent can enter the rotating tube 7 through the liquid infusion tube 20. Through the transmission of the belt, the rotating rod 4 can drive the rotating tube 7 to rotate during the rotation process, so that the rotating tube 7 can drive the multiple atomizing nozzles 8 to rotate, so that the nitrogen oxide control agent sprayed by the atomizing nozzle 8 can be evenly contacted with the exhaust gas. At the same time, the rotating tube 7 drives the multiple mixing plates 9 to stir the exhaust gas in the purification tank 6, so that the nitrogen oxide control agent and the exhaust gas can be fully mixed, thereby improving the treatment efficiency of the exhaust gas. By installing the activated carbon plate 21, the harmful substances in the exhaust gas can be adsorbed, and the exhaust gas is further filtered, thereby improving the purification effect of the exhaust gas.

[0033] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0034] Combination Figure 1-Figure 4 An embodiment of the present application provides a waste heat recovery device for a power plant based on an absorption heat pump, comprising a recovery tank 1; an air duct 2 and a water duct 3 are provided inside the recovery tank 1, and the air duct 2 is located inside the water duct 3.

[0035] The inner bottom wall of the recovery tank 1 is rotatably connected to a rotating rod 4, and the outer surface of the rotating rod 4 is fixedly connected to a plurality of stirring plates 5 distributed in a circle. The bottom end of the water guide pipe 3 is located in the recovery tank 1. By installing the water guide pipe 3 and cooperating with the air guide pipe 2, the contact time between the cooling water and the high-temperature exhaust gas can be increased, so that the high-temperature exhaust gas can be evenly absorbed. The stirring plate 5 can make the water flow in a vortex shape, so that it can evenly contact the water guide pipe 3. In conjunction with the circulating water pump 12, the cooling water with a higher temperature can be returned to the recovery pipe, so that it is evenly mixed with the cooling water, thereby accelerating the heat absorption speed and allowing the cooling water to heat up quickly.

[0036] A purification tank 6 is placed on the right side of the recovery tank 1. The inner bottom wall of the purification tank 6 is rotatably connected to a rotating tube 7. A plurality of circumferentially distributed atomizing nozzles 8 are installed on the outer surface of the rotating tube 7. A plurality of circumferentially distributed mixing plates 9 are fixedly connected to the outer surface of the rotating tube 7. By installing the atomizing nozzles 8, the nitrogen oxide control agent can be sprayed during its rotation, and the cooperation with the mixing plate 9 can make it contact evenly with the exhaust gas in the purification tank 6, thereby improving the exhaust gas treatment efficiency.

[0037] In some embodiments, two return pipes 10 are installed on the outer surface of the recovery tank 1, and a circulating water pump 12 is installed on the outer surface of the recovery tank 1. The two return pipes 10 are fixedly connected to the output end and the input end of the circulating water pump 12 respectively. The return pipe 10 located at the top is fixedly connected to the water diversion pipe 3, and the return pipe 10 located at the bottom is fixedly connected to the recovery tank 1. The installation of the circulating water pump 12 can extract water in the water diversion pipe 3 and transport it to the water flow tank, so that the higher temperature water in the water diversion pipe 3 is mixed with the cold water in the recovery tank 1, thereby increasing the heating rate of the cooling water in the recovery pipe and facilitating its recycling. The outer surface of the recovery tank 1 is fixedly connected with a drain pipe 13, and a valve 14 is installed on the outer surface of the drain pipe 13. The installation of the valve 14 can close the bottom end of the recovery tank 1, and the heated cooling water in the recovery tank 1 can be discharged by opening the valve 14.

[0038] In some embodiments, the upper end of the recovery tank 1 is fixedly connected to a water inlet pipe 15, and the bottom end of the recovery tank 1 is installed with an air inlet pipe 16. The air inlet pipe 16 completely penetrates the water pipe 3 and is fixedly connected to the air pipe 2. The external exhaust gas enters the air pipe 2 through the air inlet pipe 16. When the cooling water in the water pipe 3 circulates in the water pipe 3, it can take away the heat of the high-temperature exhaust gas in the air pipe 2. The outer surface of the purification tank 6 is fixedly connected to an air supply pipe 17. The other end of the air supply pipe 17 penetrates the recovery tank 1 and is connected to the water pipe 3 and the air pipe 2. A one-way valve 18 is installed on the outer surface of the air supply pipe 17. The installation of the one-way valve 18 can allow the exhaust gas to enter the purification tank 6 through the air supply pipe 17 to prevent the exhaust gas from flowing back.

[0039] In some embodiments, the bottom ends of the rotating rod 4 and the rotating tube 7 are fixedly connected with a pulley 19, and the two pulleys 19 are connected by belt transmission. The bottom end of the rotating rod 4 is fixedly connected to the output end of the external motor. The cooperation between the installation of the pulley 19 and the belt can drive the rotating tube 7 to rotate during the rotation of the rotating rod 4, so that the rotating tube 7 can drive the multiple atomizing nozzles 8 to rotate, so that it can evenly spray the nitrogen oxide control agent in the purification tank 6. An infusion tube 20 is installed at the upper end of the purification tank 6. The infusion tube 20 is rotatably connected to the rotating tube 7. The installation of the infusion tube 20 can input the nitrogen oxide control agent into the rotating tube 7, so that the nitrogen oxide control agent can be sprayed out from the multiple atomizing nozzles 8. An activated carbon plate 21 is installed inside the purification tank 6, and the infusion tube 20 completely penetrates the activated carbon plate 21. The upper end of the purification tank 6 is fixedly connected with an exhaust pipe 22. The installation of the activated carbon plate 21 can adsorb harmful substances in the exhaust gas, further filter the exhaust gas, and improve the purification effect of the exhaust gas.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0041] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0042] 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 device for a power plant based on an absorption heat pump, comprising a recovery tank (1); an air duct (2) and a water duct (3) are arranged inside the recovery tank (1), and the air duct (2) is located inside the water duct (3); Features: The inner bottom wall of the recovery tank (1) is rotatably connected to a rotating rod (4), the outer surface of the rotating rod (4) is fixedly connected to a plurality of stirring plates (5) distributed in a circumference, and the bottom end of the water diversion pipe (3) is located in the recovery tank (1); A purification tank (6) is placed on the right side of the recovery tank (1); a rotating tube (7) is rotatably connected to the inner bottom wall of the purification tank (6); a plurality of atomizing nozzles (8) distributed in a circumferential manner are installed on the outer surface of the rotating tube (7); and a plurality of mixing plates (9) distributed in a circumferential manner are fixedly connected to the outer surface of the rotating tube (7).

2. The power plant waste heat recovery device based on absorption heat pump according to claim 1, characterized in that: Two return pipes (10) are installed on the outer surface of the recovery tank (1), and a circulating water pump (12) is installed on the outer surface of the recovery tank (1). The two return pipes (10) are fixedly connected to the output end and the input end of the circulating water pump (12), respectively. The return pipe (10) located at the top is fixedly connected to the water diversion pipe (3), and the return pipe (10) located at the bottom is fixedly connected to the recovery tank (1).

3. The power plant waste heat recovery device based on absorption heat pump according to claim 1, characterized in that: The outer surface of the recovery tank (1) is fixedly connected to a drainage pipe (13), and a valve (14) is installed on the outer surface of the drainage pipe (13).

4. The power plant waste heat recovery device based on absorption heat pump according to claim 1, characterized in that: The upper end of the recovery tank (1) is fixedly connected to a water inlet pipe (15), and the lower end of the recovery tank (1) is provided with an air inlet pipe (16), which completely penetrates the water inlet pipe (3) and is fixedly connected to the air inlet pipe (2).

5. The power plant waste heat recovery device based on absorption heat pump according to claim 1, characterized in that: The outer surface of the purification tank (6) is fixedly connected to an air supply pipe (17), the other end of the air supply pipe (17) passes through the recovery tank (1) and is connected to the water supply pipe (3) and the air supply pipe (2), and a one-way valve (18) is installed on the outer surface of the air supply pipe (17).

6. The power plant waste heat recovery device based on absorption heat pump according to claim 1, characterized in that: The bottom ends of the rotating rod (4) and the rotating tube (7) are both fixedly connected with pulleys (19), the two pulleys (19) are connected via a belt transmission, and the bottom end of the rotating rod (4) is fixedly connected to the output end of an external motor.

7. The power plant waste heat recovery device based on absorption heat pump according to claim 1, characterized in that: A liquid infusion tube (20) is installed at the upper end of the purification tank (6), and the liquid infusion tube (20) is rotatably connected to the rotating tube (7).

8. The power plant waste heat recovery device based on absorption heat pump according to claim 1, characterized in that: An activated carbon plate (21) is installed inside the purification tank (6), the infusion tube (20) completely penetrates the activated carbon plate (21), and the upper end of the purification tank (6) is fixedly connected to an exhaust pipe (22).

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