Cogeneration unit waste heat utilization device

Abstract

The utility model provides a kind of cogeneration unit waste heat utilization device, including water storage tank, air outlet subassembly, water inlet pipe, water outlet pipe, air inlet pipe, exhaust pipe and flushing subassembly. Air outlet subassembly is fixed in the inside of water storage tank;Water inlet pipe and water outlet pipe are respectively located in the upper portion of water storage tank and the lower portion of water storage tank, and water inlet pipe and water outlet pipe are all located above air outlet subassembly, and water inlet pipe and water outlet pipe are all communicated with water storage tank;Air inlet pipe is located in the lower portion of water storage tank, and air inlet pipe is located below air outlet subassembly, exhaust pipe is located in the top of water storage tank, and air inlet pipe and exhaust pipe are all communicated with water storage tank. The utility model is dispersed into dense bubble by air outlet subassembly with high temperature flue gas, to greatly improve gas-liquid contact area and heat exchange efficiency, and by high pressure flushing, dust dirt deposited in air outlet subassembly and water storage tank bottom filter plate can be removed, to solve the problem of efficiency attenuation caused by dust accumulation.

Description

Technical Field

[0001] This utility model relates to a device, specifically a waste heat utilization device for a combined heat and power (CHP) unit, belonging to the field of waste heat recovery technology for CHP units. Background Technology

[0002] In combined heat and power (CHP) systems, efficiently recovering waste heat from the high-temperature flue gas emitted by gas turbines or internal combustion engines, especially for heating water (such as domestic hot water, heating water, or process water), is a key step in improving the overall energy utilization rate of the system. However, the dust particles commonly present in the flue gas cause serious scaling and ash accumulation problems for waste heat recovery devices, severely restricting heat exchange efficiency and the continuity of equipment operation. Utility Model Content

[0003] Based on the above background, the purpose of this utility model is to provide a waste heat utilization device for cogeneration units that can clean internal ash accumulation and efficiently recover waste heat, thereby solving the problems described in the background art.

[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0005] A waste heat utilization device for a combined heat and power unit includes a water storage tank, an air outlet assembly, a water inlet pipe, a water outlet pipe, an air inlet pipe, an exhaust pipe, and a flushing assembly.

[0006] The air outlet assembly is fixed inside the water storage tank;

[0007] The inlet pipe and outlet pipe are located at the upper part and lower part of the water storage tank, respectively, and both the inlet pipe and outlet pipe are located above the air outlet assembly. Both the inlet pipe and outlet pipe are connected to the water storage tank.

[0008] The air inlet pipe is located at the bottom of the water tank and below the air outlet assembly. The exhaust pipe is located at the top of the water tank, and both the air inlet pipe and the exhaust pipe are connected to the water tank.

[0009] The flushing assembly includes a cleaning water tank, a wastewater tank, a water supply pipe, a drain pipe, a booster pump, and a first valve body. The cleaning water tank and the wastewater tank are located on one side of the storage tank. Both ends of the water supply pipe are connected to the cleaning water tank and the storage tank, respectively, and the end of the water supply pipe connected to the storage tank is located below the air outlet assembly. The water supply pipe is equipped with a booster pump. Both ends of the drain pipe are connected to the wastewater tank and the storage tank, respectively, and the end of the drain pipe connected to the storage tank is located below the air outlet assembly. The drain pipe is equipped with a first valve body.

[0010] Preferably, the air outlet assembly includes a partition, a plurality of one-way air outlets, and a filter plate. The partition is connected to a water storage tank, and a cavity is formed between the partition and the bottom of the water storage tank. A plurality of one-way air outlets are provided on the surface of the partition, and the one-way air outlets are connected to the partition. A filter plate is provided at the bottom of the partition, and the filter plate is connected to the water storage tank.

[0011] Preferably, the intake pipe is provided with a second valve body.

[0012] Preferably, a ramp is provided at the bottom of the inner side of the water storage tank, and the lowest end of the ramp is adjacent to the flushing component, and the ramp and the water storage tank are integrally formed.

[0013] Preferably, a nozzle is installed at one end of the water supply pipe that connects to the water storage tank.

[0014] Preferably, the unidirectional air outlets are arranged in a matrix on the partition.

[0015] Preferably, the water storage tank is provided with two baffles inside, and the two baffles are arranged opposite each other, and the baffles are connected to the water storage tank.

[0016] Preferably, the water storage tank is provided with a liquid level window, which is connected to the water storage tank.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This utility model discloses a waste heat utilization device for a cogeneration unit. By dispersing high-temperature flue gas into dense bubbles through an exhaust component, the gas-liquid contact area and heat exchange efficiency are significantly improved. Furthermore, high-pressure rinsing can remove dust and dirt deposited on the exhaust component and the filter plate at the bottom of the water tank, thereby solving the problem of efficiency reduction caused by ash accumulation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0022] Figure 3 This is a schematic diagram showing the positional relationship between the partition and the filter plate of this utility model.

[0023] In the diagram: 1. Water tank; 2. Air outlet assembly; 201. Baffle; 202. One-way air outlet; 203. Filter plate; 3. Water inlet pipe; 4. Water outlet pipe; 5. Air inlet pipe; 6. Exhaust pipe; 7. Flushing assembly; 701. Cleaning water tank; 702. Wastewater tank; 703. Water supply pipe; 704. Drain pipe; 705. Booster pump; 706. First valve body; 8. Cavity; 9. Second valve body; 10. Slope; 11. Nozzle; 12. Baffle; 13. Liquid level window. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0025] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the field. Unless otherwise specified, the methods in the following embodiments are conventional methods in the field. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following detailed description, many specific details are set forth to facilitate explanation and provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may be practiced by those skilled in the art without these specific details.

[0027] like Figure 1 As shown, the water storage tank 1 is a vertical sealed container welded from corrosion-resistant steel plates. The bottom of its inner side is integrally stamped to form a slope 10 that tilts to one side. The lowest end of the slope 10 is close to the inlet of the drain pipe 704 of the flushing assembly 7. The outer wall of the water storage tank 1 is inlaid with a liquid level window 13 made of pressure-resistant glass for real-time observation of the internal water level.

[0028] like Figure 2 and Figure 3 As shown, inside the water storage tank 1, a horizontally fixed air outlet assembly 2 is located below it. The air outlet assembly 2 consists of a rectangular stainless steel partition 201, a filter plate 203, and several one-way air outlets 202. The edge of the partition 201 is fully welded to the inner wall of the water storage tank 1, forming a sealed cavity 8 below the partition 201. Several one-way air outlets 202 are evenly distributed in a matrix on the surface of the partition 201. A sintered stainless steel filter plate 203 is laid at the bottom of the partition 201, and the filter plate 203 is bolted to the inner wall of the water storage tank 1 around its perimeter.

[0029] The upper side wall of the water storage tank 1 is connected to the inlet pipe 3, and the lower side wall is connected to the outlet pipe 4, both located above the partition 201. Two corresponding baffles 12 are added at the inlet of the inlet pipe 3. The baffles 12 are welded to the inner wall of the water storage tank 1 to disperse the incoming water flow and prevent it from directly rushing towards the outlet pipe 4. The air inlet pipe 5 enters from the bottom of the water storage tank 1 and extends to the cavity 8 below the partition 201. A second valve body 9, specifically an electric ball valve, is installed on the pipe to control the flow of flue gas. The exhaust pipe 6 is located at the center of the top cover of the water storage tank 1.

[0030] The flushing assembly 7 is arranged side-by-side on the side of the water storage tank 1, including a cleaning water tank 701, a wastewater tank 702, a water supply pipe 703, a drain pipe 704, a booster pump 705, and a first valve body 706. The cleaning water tank 701 and the wastewater tank 702 are made of PE material. One end of the water supply pipe 703 is connected to the bottom of the cleaning water tank 701, and the other end extends through the side wall of the water storage tank 1 to the cavity 8 below the partition 201. A fan-shaped stainless steel nozzle 11 is installed at its port, facing the bottom of the partition 201 and the filter plate 203. The booster pump 705 is connected in series in the middle of the water supply pipe 703. One end of the drain pipe 704 is connected to the top of the wastewater tank 702, and the other end enters the cavity 8 below the partition 201 from near the lowest end of the slope 10 of the water storage tank 1. The first valve body 706, specifically a solenoid valve, is installed on the pipe.

[0031] The implementation principle of this utility model for a waste heat utilization device for a combined heat and power unit is as follows:

[0032] High-temperature flue gas is injected into the sealed cavity 8 at the bottom of the water storage tank 1 through the inlet pipe 5. After large dust particles are intercepted by the filter plate 203 of the outlet assembly 2, it is forced to form a dense cluster of microbubbles that rise upwards through the matrix-arranged unidirectional outlets 202 on the baffle 201. During the rise, the bubbles fully contact the water in the water storage tank 1, achieving efficient heat exchange by expanding the gas-liquid heat transfer area. Cold water is injected from the inlet pipe 3 and blocked by the baffle 12, preventing it from flowing directly to the outlet pipe 4, thus prolonging its residence time in the high-temperature zone and reducing water flow disturbance, ensuring full absorption of heat energy. The heated hot water is stably output from the lower outlet pipe 4, and the cooled flue gas is discharged through the top exhaust pipe 6.

[0033] When dust accumulates on the filter plate 203, the one-way air outlet 202, and the bottom cavity 8 of the tank to the point of affecting heat exchange efficiency, the second valve body 9 of the air inlet pipe 5 is closed to interrupt the flue gas input, and the flushing component 7 is activated. That is, the pressurization pump 705 pressurizes the water in the cleaning water tank 701 through the water supply pipe 703, and sprays high-pressure water into the bottom cavity 8 of the partition plate 201 through the nozzle 11, which powerfully flushes the scale attached to the filter screen, the inner wall of the one-way air outlet 202, and the bottom of the tank. The detached dirt is collected along the slope 10 at the bottom of the water storage tank 1 with the water flow to the lowest end, and discharged into the wastewater tank 702 through the drain pipe 704 of the first valve body 706, realizing cleaning without disassembly.

[0034] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A waste heat utilization device for a combined heat and power unit, characterized by: The waste heat utilization device of the cogeneration unit includes a water storage tank (1), an air outlet assembly (2), an inlet pipe (3), an outlet pipe (4), an air inlet pipe (5), an exhaust pipe (6), and a flushing assembly (7). The air outlet assembly (2) is fixed inside the water storage tank (1); The inlet pipe (3) and outlet pipe (4) are located at the upper part and lower part of the water storage tank (1) respectively, and the inlet pipe (3) and outlet pipe (4) are both located above the air outlet assembly (2). The inlet pipe (3) and outlet pipe (4) are both connected to the water storage tank (1). The air inlet pipe (5) is located at the lower part of the water storage tank (1) and the air inlet pipe (5) is located below the air outlet assembly (2). The exhaust pipe (6) is located at the top of the water storage tank (1). Both the air inlet pipe (5) and the exhaust pipe (6) are connected to the water storage tank (1). The flushing assembly (7) includes a cleaning water tank (701), a wastewater tank (702), a water supply pipe (703), a drain pipe (704), a booster pump (705), and a first valve body (706). The cleaning water tank (701) and the wastewater tank (702) are located on one side of the water storage tank (1). The two ends of the water supply pipe (703) are connected to the cleaning water tank (701) and the water storage tank (1) respectively. The end of the water supply pipe (703) connected to the water storage tank (1) is located below the air outlet assembly (2). The water supply pipe (703) is equipped with a booster pump (705). The two ends of the drain pipe (704) are connected to the wastewater tank (702) and the water storage tank (1) respectively. The end of the drain pipe (704) connected to the water storage tank (1) is located below the air outlet assembly (2). The drain pipe (704) is equipped with a first valve body (706).

2. The device according to claim 1, wherein: The air outlet assembly (2) includes a partition (201), a plurality of one-way air outlets (202) and a filter plate (203). The partition (201) is connected to the water storage tank (1), and a cavity (8) is formed between the partition (201) and the bottom of the water storage tank (1). A plurality of one-way air outlets (202) are provided on the surface of the partition (201), and the one-way air outlets (202) are connected to the partition (201). A filter plate (203) is provided at the bottom of the partition (201), and the filter plate (203) is connected to the water storage tank (1).

3. The device according to claim 1, characterized in that: The intake pipe (5) is equipped with a second valve body (9).

4. The device according to claim 1, characterized in that: The bottom of the inner side of the water tank (1) is provided with a ramp (10), and the lowest end of the ramp (10) is adjacent to the flushing assembly (7). The ramp (10) and the water tank (1) are integrally formed.

5. The device according to claim 1, wherein: A nozzle (11) is installed at one end of the water supply pipe (703) that connects to the water storage tank (1).

6. The device according to claim 2, characterized in that: Several of the unidirectional air outlets (202) are arranged in a matrix on the partition (201).

7. The device according to claim 5, characterized in that: The water storage tank (1) is provided with two baffles (12) inside, and the two baffles (12) are provided correspondingly, and the baffles (12) are connected to the water storage tank (1).

8. The device according to claim 7, characterized in that: The water storage tank (1) is provided with a liquid level window (13), and the liquid level window (13) is connected to the water storage tank (1).

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