Waste heat recovery device of single-screw expander

Abstract

The utility model discloses a waste heat recovery device of a single-screw expander, which relates to the technical field of waste heat recovery and comprises a sealing box, a waste heat recovery component is arranged in the sealing box, compressed air is conveyed into a turbine pipe through an air storage tank, two strands of hot and cold air flows are generated in the turbine pipe, and the hot air flows are discharged outwards through an exhaust pipe. Cold air flow is conveyed into the buffer transverse pipe through the air conveying pipe, a control valve is opened, the cold air flow is conveyed into the sealing cylinder through the connecting pipe and the drying filter by an air nozzle on the left side face of the buffer transverse pipe, and the evaporated air is cooled; according to the cooling device, dust, rust and other harmful substances in cold air flow conveyed by the turbine pipe are removed, the arranged evaporator conducts heat exchange and heat absorption on air conveyed into the sealing cylinder through the air inlet pipe, so that the refrigeration effect is achieved, and the arranged valve facilitates discharging of cooled air through the air outlet and facilitates recycling.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery device for a single screw expander. Background Art

[0002] A single screw expander is a heat engine that converts heat energy into mechanical energy by expanding the volume of gas to drive the screw rotor to rotate. It can be widely used in the fields of industrial waste heat recovery, geothermal power generation, biomass power generation, etc. It can directly drive generators, and can also directly drive mechanical equipment such as pumps and fans. However, the cost of the waste heat recovery device of a single screw expander in the prior art is too high and is not suitable for small-scale industrial production.

[0003] In the patent with publication number CN205605252U, a device for recovering waste heat from engine exhaust of a single screw expander is proposed. The device includes a single screw expander body, a steam circulation pipe, a steam quantitative delivery device, a refrigeration device, an elastic connector, a steam baffle cover, an electric telescopic rod, an electric slide rail, a piston, a transmission mechanism, a generator, and a control panel. By adding a steam circulation pipe, the steam circulation pipe can insulate the steam when the steam flows through the steam circulation pipe. Therefore, in the process of steam circulation, the heat of the steam will not be greatly lost, thereby further improving the efficiency of heat conversion. The movable slide rail drives the electric telescopic rod to slide to the right side of the steam choke cover, and the second protrusion on the electric telescopic rod is adjusted to engage with the first protrusion on the steam choke cover, and the electric slide rail is controlled to slide leftward, thereby opening the steam choke cover, and steam enters the steam circulation pipe on the right side; the air pressure in the steam circulation pipe expands due to heat, thereby pushing the piston, and the refrigeration device cools the hot air in the steam circulation pipe, so that the piston moves left and right, and the energy is transmitted to the generator through the transmission mechanism, so as to achieve the effect of recycling waste heat through cheap and easily available electronic equipment. However, there are still the following problems in this patent:

[0004] The existing waste heat recovery structure in the expander does not have a good cooling component. The steam contains water or irreducible elements, which will cause the temperature of the liquid to drop significantly, and ice blockage will easily occur, affecting the normal operation of the system. It does not have a dry structure.

[0005] In view of the above problems, it is necessary to design a single screw expander waste heat recovery device to overcome the above problems. Utility Model Content

[0006] The main purpose of the utility model is to provide a waste heat recovery device for a single screw expander, which can effectively solve the problems in the background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A waste heat recovery device for a single screw expander, comprising a sealed box, wherein a waste heat recovery component is arranged inside the sealed box;

[0009] The waste heat recovery component comprises a sealed cavity arranged at the front end of the sealed box, a sealed cylinder is arranged inside the sealed cavity, a sealing ring is arranged at the rear end of the inner wall of the sealed cylinder, a drying filter is arranged on the right side of the sealed cavity, a connecting pipe is arranged on the right side of the drying filter, a control valve is arranged on the top of the connecting pipe, a valve is arranged behind the sealed cylinder, and an air outlet is arranged behind the valve;

[0010] An evaporator is arranged on the front of the sealed box, a protective cavity is arranged on the right side of the sealed box, an air storage tank is arranged on the right side of the protective cavity, a turbine pipe is installed on the left side of the air storage tank passing through the right side of the protective cavity, an exhaust pipe is arranged on the front of the turbine pipe, a sealing gasket is arranged on the outer wall of the exhaust pipe, an air supply pipe is arranged on the left side of the turbine pipe, a buffer cross pipe is arranged on the left side of the air supply pipe, an air nozzle is arranged on the left side of the buffer cross pipe, and an air intake pipe is arranged at the front end of the left side of the sealed box.

[0011] As a preferred solution of the utility model, the sealing chamber and the sealing cylinder are detachably connected, the sealing cylinder and the sealing ring are detachably connected, the sealing cylinder and the valve are detachably connected, the sealing box and the air outlet are detachably connected, and the sealing cylinder and the air inlet pipe are detachably connected.

[0012] As a preferred solution of the utility model, the interior of the drying filter and the interior of the sealing cylinder are mutually connected, the drying filter and the connecting pipe are detachably connected, and the control valve and the connecting pipe are movably connected and detachable.

[0013] As a preferred solution of the utility model, the right side surface of the connecting pipe passes through the right side surface of the sealing box and contacts the inside of the protective cavity, and the connecting pipe and the sealing box are detachably connected.

[0014] As a preferred solution of the utility model, the protective cavity is detachably connected to the gas tank, the gas tank is movably connected to the turbine pipe, the turbine pipe is detachably connected to the exhaust pipe, and the exhaust pipe is detachably connected to the sealing gasket.

[0015] As a preferred solution of the utility model, the turbine pipe is detachably connected to the air supply pipe, the air supply pipe is detachably connected to the buffer cross pipe, and the buffer cross pipe is detachably connected to the gas nozzle.

[0016] Beneficial Effects

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The waste heat recovery device of the single-screw expander conveys compressed air to the turbine tube through the set air storage tank, generates two hot and cold air flows in the turbine tube, the hot air flow is discharged outwards through the exhaust pipe, and the cold air flow is conveyed to the buffer cross pipe through the air delivery pipe. The control valve is opened to convey the cold air flow to the sealing cylinder through the connecting pipe and the drying filter through the air nozzle on the left side of the buffer cross pipe, and the evaporated gas is cooled. The drying filter is set to remove harmful substances such as dust and rust in the cold air flow conveyed from the turbine tube. The set evaporator performs heat exchange on the gas conveyed to the sealing cylinder by the inlet pipe, absorbs heat, and thus achieves a refrigeration effect. The set valve is convenient for discharging the cooled gas through the air outlet, which is convenient for recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the evaporator of the utility model;

[0021] Figure 3 It is a schematic diagram of the turbine tube structure of the utility model.

[0022] In the figure: 1. Sealing box; 2. Protective cavity; 3. Evaporator; 4. Waste heat recovery component; 5. Exhaust pipe; 6. Sealing gasket; 7. Turbine pipe; 8. Air storage tank; 9. Air pipe; 10. Buffer cross pipe; 11. Air nozzle; 12. Inlet pipe; 301. Sealing cavity; 302. Sealing cylinder; 303. Sealing ring; 304. Valve; 305. Air outlet; 306. Drying filter; 307. Connecting pipe; 308. Control valve. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-3 As shown, a waste heat recovery device for a single screw expander comprises a sealed box 1, and a waste heat recovery component 4 is arranged inside the sealed box 1;

[0025] The waste heat recovery component 4 includes a sealed chamber 301 arranged at the front end of the sealed box 1, a sealed cylinder 302 is arranged inside the sealed chamber 301, a sealing ring 303 is arranged at the rear end of the inner wall of the sealed cylinder 302, a drying filter 306 is arranged on the right side of the sealed chamber 301, a connecting pipe 307 is arranged on the right side of the drying filter 306, a control valve 308 is arranged on the top of the connecting pipe 307, a valve 304 is arranged behind the sealing cylinder 302, and an air outlet 305 is arranged behind the valve 304;

[0026] An evaporator 3 is arranged on the front of the sealed box 1, a protective cavity 2 is arranged on the right side of the sealed box 1, an air storage tank 8 is arranged on the right side of the protective cavity 2, a turbine pipe 7 is installed on the left side of the air storage tank 8 through the right side of the protective cavity 2, an exhaust pipe 5 is arranged on the front of the turbine pipe 7, a sealing gasket 6 is arranged on the outer wall of the exhaust pipe 5, an air delivery pipe 9 is arranged on the left side of the turbine pipe 7, a buffer cross pipe 10 is arranged on the left side of the air delivery pipe 9, an air nozzle 11 is arranged on the left side of the buffer cross pipe 10, and an air intake pipe 12 is arranged at the front end of the left side of the sealed box 1;

[0027] The sealing chamber 301 is detachably connected to the sealing cylinder 302, the sealing cylinder 302 is detachably connected to the sealing ring 303, the sealing cylinder 302 is detachably connected to the valve 304, the sealing box 1 is detachably connected to the air outlet 305, the sealing cylinder 302 is detachably connected to the air inlet pipe 12, the interior of the drying filter 306 is mutually connected to the interior of the sealing cylinder 302, the drying filter 306 is detachably connected to the connecting pipe 307, the control valve 308 is movably connected to the connecting pipe 307, and the sealing box 1 is detachably connected to the air outlet 305. The sealing cylinder 302 is detachably connected to the air inlet pipe 12, and the interior of the drying filter 306 is mutually connected to the interior of the sealing cylinder 302. The right side surface of the connecting pipe 307 penetrates the right side surface of the sealing box 1 and contacts the inside of the protective cavity 2. The connecting pipe 307 is detachably connected to the sealing box 1, the protective cavity 2 is detachably connected to the air storage tank 8, the air storage tank 8 is movably connected to the turbine pipe 7, the turbine pipe 7 is detachably connected to the exhaust pipe 5, the exhaust pipe 5 is detachably connected to the sealing gasket 6, the turbine pipe 7 is detachably connected to the air delivery pipe 9, the air delivery pipe 9 is detachably connected to the buffer cross pipe 10, and the buffer cross pipe 10 is detachably connected to the gas nozzle 11;

[0028] Among them, the compressed air is transported to the turbine pipe 7 through the set air storage tank 8, and two hot and cold air flows are generated in the turbine pipe 7. The hot air flow is discharged outward through the exhaust pipe 5, and the cold air flow is transported to the buffer cross pipe 10 through the air supply pipe 9. The control valve 308 is opened, and the cold air flow is transported to the sealing tube 302 through the connecting pipe 307 and the drying filter 306 by the air nozzle 11 on the left side of the buffer cross pipe 10, and the evaporated gas is cooled. The drying filter 306 is set to remove harmful substances such as dust and rust in the cold air flow transported from the turbine pipe 7. The evaporator 3 is set to perform heat exchange on the gas transported to the sealing tube 302 by the intake pipe 12, absorb heat, and thus achieve a refrigeration effect. The valve 304 is set to facilitate the discharge of the cooled gas through the outlet 305 for easy recovery.

[0029] It should be noted that the utility model is a waste heat recovery device for a single-screw expander. When in use, the waste heat is transported to the sealing cylinder 302 through the air inlet pipe 12 on the left side of the sealing box 1, and the evaporator 3 performs heat exchange with the waste heat gas to absorb heat. The air storage tank 8 transports the compressed air to the turbine pipe 7, and the compressed air generates two hot and cold airflows in the turbine pipe 7. The hot airflow is discharged to the outside through the exhaust pipe 5, and the cold airflow is transported to the buffer cross pipe 10 through the air supply pipe 9. The control valve 308 is opened, and the cold airflow is transported to the connecting pipe 307 by the air nozzle 11 set on the left side of the buffer cross pipe 10. The cold airflow is transported to the drying filter 307, and the harmful impurities in the compressed air are removed and then transmitted to the inside of the sealing cylinder 302 for cooling. The valve 304 is opened to discharge the gas after cooling and evaporation.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A waste heat recovery device for a single screw expander, comprising a sealing box (1), characterized in that: A waste heat recovery component (4) is arranged inside the sealed box (1); The waste heat recovery component (4) comprises a sealed cavity (301) arranged at the front end of the sealed box (1); a sealed cylinder (302) is arranged inside the sealed cavity (301); a sealing ring (303) is arranged at the rear end of the inner wall of the sealed cylinder (302); a drying filter (306) is arranged on the right side of the sealed cavity (301); a connecting pipe (307) is arranged on the right side of the drying filter (306); a control valve (308) is arranged on the top of the connecting pipe (307); a valve (304) is arranged behind the sealed cylinder (302); and an air outlet (305) is arranged behind the valve (304); An evaporator (3) is arranged on the front of the sealed box (1), a protective cavity (2) is arranged on the right side of the sealed box (1), an air storage tank (8) is arranged on the right side of the protective cavity (2), a turbine pipe (7) is installed on the left side of the air storage tank (8) through the right side of the protective cavity (2), an exhaust pipe (5) is arranged on the front of the turbine pipe (7), a sealing gasket (6) is arranged on the outer wall of the exhaust pipe (5), an air supply pipe (9) is arranged on the left side of the turbine pipe (7), a buffer cross pipe (10) is arranged on the left side of the air supply pipe (9), an air nozzle (11) is arranged on the left side of the buffer cross pipe (10), and an air intake pipe (12) is arranged at the front end of the left side of the sealed box (1).

2. A waste heat recovery device for a single screw expander according to claim 1, characterized in that: The sealing chamber (301) and the sealing cylinder (302) are detachably connected, the sealing cylinder (302) and the sealing ring (303) are detachably connected, the sealing cylinder (302) and the valve (304) are detachably connected, the sealing box (1) and the air outlet (305) are detachably connected, and the sealing cylinder (302) and the air inlet pipe (12) are detachably connected.

3. The waste heat recovery device for a single screw expander according to claim 1, characterized in that: The interior of the drying filter (306) and the interior of the sealing cylinder (302) are interconnected, the drying filter (306) and the connecting pipe (307) are detachably connected, and the control valve (308) and the connecting pipe (307) are movably connected and detachable.

4. The waste heat recovery device for a single screw expander according to claim 1, characterized in that: The right side surface of the connecting pipe (307) penetrates the right side surface of the sealing box (1) and contacts the inside of the protection cavity (2); the connecting pipe (307) and the sealing box (1) are detachably connected.

5. The waste heat recovery device for a single screw expander according to claim 1, characterized in that: The protective cavity (2) and the gas storage tank (8) are detachably connected, the gas storage tank (8) and the turbine pipe (7) are movably connected, the turbine pipe (7) and the exhaust pipe (5) are detachably connected, and the exhaust pipe (5) and the sealing gasket (6) are detachably connected.

6. A waste heat recovery device for a single screw expander according to claim 1, characterized in that: The turbine pipe (7) is detachably connected to the air delivery pipe (9), the air delivery pipe (9) is detachably connected to the buffer cross pipe (10), and the buffer cross pipe (10) is detachably connected to the air nozzle (11).

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