A steam circulation system

Abstract

The present invention belongs to a kind of steam recovery, specifically relates to a steam circulation system, including a steam desorption device, a compressor unit and an adsorption and analysis module, the steam desorption device, the compressor unit and the adsorption and analysis module are connected in sequence through a steam pipe to form a steam circulation loop, and also includes a cold water tank and a steam generator, the cold water tank and the compressor unit are connected through a cooling water pipe to form a cooling water circulation loop, and the hot water discharge port of the cold water tank is connected to the water inlet of the steam generator, and the steam discharge port of the steam generator is connected to the steam inlet of the adsorption and analysis module through a steam pipe; on the basis of the original steam circulation loop, the present invention recovers the heat of the compressor unit through cooling water, and utilizes the heat to the steam generator used to supplement the steam flow of the steam circulation loop, thereby reducing the energy consumption required for supplementing the steam flow of the steam circulation loop, so that the overall energy saving of the steam circulation system is higher.

Description

Technical Field

[0001] The invention belongs to steam recovery, and in particular relates to a steam circulation system. Background Art

[0002] When recycling some solvents, there are several methods, including absorption method, adsorption method and membrane separation method. Among them, adsorption method is a commonly used method, and steam desorption method is to use saturated water vapor to heat and evaporate the desorbed solvent after the adsorption material adsorbs the solvent. In order to reduce energy consumption, the prior art (CN208907101U) proposes the following method for recycling steam: the steam after desorbing the solvent is sent to a compressor for compression, and the compressed steam is first sent to an adsorption and analysis device to adsorb the residual solvent in the steam, and then sent to mix with the solvent, heat, evaporate and desorb, so as to recycle the steam and complete the recycling of steam. However, in this method, the heat generated by the compressor when it is working is not utilized, and the overall energy saving needs to be improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a steam circulation system with high energy saving.

[0004] The content of the present invention includes a steam desorption device, a compressor unit and an adsorption and analysis module. The steam desorption device, the compressor unit and the adsorption and analysis module are connected in sequence through a steam pipe to form a steam circulation loop. It also includes a cold water tank and a steam generator. The cold water tank and the compressor unit are connected through a cooling water pipe to form a cooling water circulation loop, and the hot water discharge port of the cold water tank is connected to the water inlet of the steam generator, and the steam discharge port of the steam generator is connected to the steam inlet of the adsorption and analysis module through a steam pipe.

[0005] Furthermore, the compressor unit includes at least two compressors arranged in series through a steam pipe, and a heat pipe is arranged on the compressor. The heat pipe is coiled and arranged on the surface of the compressor and is attached to the surface of the compressor. The cold water tank is provided with a cold water outlet and a cold water return outlet, and both ends of the heat pipe are respectively connected to the cold water outlet and the cold water return outlet through corresponding cooling water pipes.

[0006] Furthermore, the cold water tank comprises an outer shell and an inner shell arranged inside the outer shell, a cavity is arranged between the outer shell and the inner shell, and the cavity is filled with a heat insulation layer.

[0007] Furthermore, a temperature sensor is provided in the cold water tank, and a valve 1 is provided on the hot water discharge port.

[0008] Furthermore, the cold water tank is provided with a water inlet, which is connected to an external water supply device.

[0009] Furthermore, a second valve is provided on the water inlet.

[0010] Furthermore, a water pump is provided on the cooling water circulation loop.

[0011] Furthermore, a valve three is provided on the steam pipe connecting the steam discharge port of the steam generator and the steam inlet of the adsorption and analysis module.

[0012] Furthermore, the adsorption and analysis module includes at least two adsorption and analysis devices arranged in parallel.

[0013] Furthermore, the steam desorption device includes a mixing tank and an evaporation tank, the steam inlet of the mixing tank is connected to the steam outlet of the adsorption analysis module, the steam outlet of the mixing tank is connected to the steam inlet of the evaporation tank, the solvent inlet of the mixing tank is connected to the solvent feeding device, and the steam outlet of the evaporation tank is connected to the steam inlet of the compressor unit.

[0014] The beneficial effect of the present invention is that, on the basis of the original steam circulation loop, the heat of the compressor unit is recovered by cooling water, and the heat is utilized in the steam generator used to supplement the steam flow of the steam circulation loop, thereby reducing the energy consumption required to supplement the steam flow of the steam circulation loop, making the overall energy saving of the steam circulation system higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of setting a heat conduction pipe on the compressor in the present invention.

[0017] Figure 3 It is a cross-sectional schematic diagram of the cold water tank in the present invention.

[0018] In the figure, 10 is a steam desorption device; 11 is a mixing tank; 12 is an evaporation tank; 20 is a compression unit; 21 is a compressor; 22 is a heat transfer pipe; 30 is a cold water tank; 31 is an outer shell; 32 is an inner shell; 33 is an insulation layer; 34 is a hot water discharge port; 35 is a temperature sensor; 36 is a water inlet; 37 is a valve one; 38 is a valve two; 39 is a water pump; 40 is a steam generator; 50 is an adsorption and analysis module; 51 is an adsorption and analysis device; 60 is a valve three; 70 is a solvent feeding device; 80 is a condensate tank. DETAILED DESCRIPTION

[0019] As attached Figure 1-3As shown, the present invention includes a steam desorption device 10, a compressor unit 20 and an adsorption analysis module 50. The steam desorption device 10 is used to mix the solvent mixture to be recovered and steam and heat to desorb the solvent. The compressor unit 20 is used to compress the steam after the solvent is desorbed. The adsorption analysis module 50 is used to adsorb the solvent carried in the steam. The steam desorption device 10, the compressor unit 20 and the adsorption analysis module 50 are connected in sequence through a steam pipe to form a steam circulation loop. The solvent to be recovered is mixed with steam in the steam desorption device 10 and then heated to evaporate and desorb the solvent. The steam is then sent to the compressor unit 20 for compression and then sent to the adsorption analysis module 50 to adsorb the solvent mixed in the steam. The steam after adsorption is then sent to the steam desorption device 10 for recycling. The present invention also includes a cold water tank 30 and a steam generator 40. The cold water tank 30 and the compressor unit 20 are connected to the steam generator 40. The compressor units 20 are connected by cooling water pipes to form a cooling water circulation loop. The cooling water pipes include a cooling water inlet pipe and a cooling water return pipe. The cold water tank 30 provides cooling water to the compressor unit 20 through the cooling water inlet pipe. The cooling water recovers the heat generated by the compressor unit 20 when it is working, and then flows back to the cold water tank 30 along the cooling water return pipe. The hot water discharge port 34 of the cold water tank 30 is connected and communicated with the water inlet of the steam generator 40. After the cooling water in the cold water tank 30 circulates multiple times to cool the compressor unit 20, the cooling water is heated to hot water, and the hot water is discharged to the steam generator 40 for use by the steam generator 40. The steam discharge port of the steam generator 40 is connected to the steam inlet of the adsorption analysis module 50 through a steam pipe. In the original steam recycling process, the steam flow rate will be insufficient, and the steam generated by the steam generator 40 is used to supplement the steam flow rate of the steam circulation loop.

[0020] The steam circulation system provided by the present invention, based on the original steam circulation loop, recovers the heat of the compressor unit 20 through cooling water, and utilizes the heat in the steam generator 40 for supplementing the steam flow of the steam circulation loop, thereby reducing the energy consumption required to supplement the steam flow of the steam circulation loop, making the overall energy saving of the steam circulation system higher.

[0021] In the present invention, the compressor unit 20 includes at least two compressors 21 arranged in series through a steam pipe. The compressors 21 arranged in series are used to pressurize the steam in sequence. A heat pipe 22 is arranged on a single compressor 21. The single heat pipe 22 is coiled and arranged on the surface of the single compressor 21 and is in contact with the surface of the compressor 21, so that the heat generated by the compressor 21 when working can be transferred to the heat pipe 22; wherein, in order to ensure a higher heat recovery rate, the coiling spacing can be reduced at a position where a higher heat is generated when the drive mechanism of the compressor 21 is working. Preferably, the heat pipe 22 is made of aluminum, which has good heat dissipation performance. The cold water tank 30 is provided with the same number of cold water outlets and cold water return ports as the heat pipes 22. The two ends of a single heat pipe 22 are connected to the corresponding cold water outlets and cold water return ports through a cooling water inlet pipe and a cooling water return pipe, respectively. The cooling water in the cold water tank 30 enters the heat pipe 22 along the cooling water inlet pipe, takes away the heat and then flows back to the cold water tank 30 through the cooling water return pipe. To facilitate the outflow and return of cooling water, the cold water outlet is arranged at the lower end of the cold water tank, and the cold water return port is arranged at the upper end of the cold water tank. The present invention is provided with a heat pipe 22 wound on the compressor 21. Compared with slotting the compressor 21 casing, the present invention has lower cost and is more convenient to maintain.

[0022] In the present invention, the cold water tank 30 includes an outer shell 31 and an inner shell 32 arranged inside the outer shell 31. A cavity is provided between the outer shell 31 and the inner shell 32. The cavity is filled with a heat insulation layer 33, which can reduce the speed of heat dissipation in the cold water tank 30.

[0023] In the present invention, a temperature sensor 35 is provided in the cold water tank 30, and the temperature sensor 35 is electrically connected to an external controller. The temperature sensor 35 is used to detect the temperature of the water in the cold water tank 30 in real time, and a valve 37 is provided on the hot water discharge port 34. The cooling water in the cold water tank 30 circulates to cool the compressor unit 20 and recover the heat of the compressor unit 20. When the water in the cold water tank 30 reaches a preset temperature, the valve 37 is opened to discharge the hot water into the steam generator 40. Preferably, the valve 37 is a solenoid valve, and the valve 37 is electrically connected to an external controller.

[0024] In the present invention, the cold water tank 30 is provided with a water inlet 36, which is connected to an external water supply device. After the hot water in the cold water tank 30 is discharged, water is added through the water inlet 36. The water inlet 36 is provided with a valve 2 38. When water is added to the cold water tank 30, the valve 2 38 is opened. Preferably, the valve 2 38 is a solenoid valve, and the valve 2 38 is electrically connected to an external controller.

[0025] In the present invention, a water pump 39 is provided on the cooling water pipe, specifically, on the cooling water return pipe. The water pump 39 is used to transport cooling water so that the cooling water flows along the cooling water circulation loop.

[0026] In the present invention, a valve 3 60 is provided on the steam pipe connecting the steam discharge port of the steam generator 40 and the steam inlet of the adsorption analysis module 50. When steam is replenished, the valve 3 60 is opened; preferably, the valve 3 60 is a solenoid valve, and the valve 3 60 is electrically connected to an external controller.

[0027] In the present invention, the adsorption and analysis module 50 includes at least two adsorption and analysis devices 51 arranged in parallel. By arranging at least two adsorption and analysis devices 51 in parallel, the steam to be adsorbed can be diverted to ensure the effect and efficiency of adsorption.

[0028] In the present invention, the steam desorption device 10 includes a mixing tank 11 and an evaporation tank 12, the steam inlet of the mixing tank 11 is connected to the steam outlet of the adsorption analysis module 50, the steam outlet of the mixing tank 11 is connected to the steam inlet of the evaporation tank 12, the solvent inlet of the mixing tank 11 is connected to the solvent feeding device 70, the solvent feeding device 70 is used to transport the solvent mixture to be recovered into the mixing tank 11, and the steam outlet of the evaporation tank 12 is connected to the steam inlet of the compressor unit 20. When the steam circulation loop is working, the solvent mixture to be recovered enters the mixing tank 11, and after being mixed with the steam sent from the adsorption analysis module 50 in the mixing tank 11, the part carried by the steam enters the evaporation tank 12 for heating and evaporation, and the part not carried by the steam flows back to the condensation tank 80, and is condensed by the condensation tank 80, wherein the part condensed into liquid is discharged to the external collection device one, and the non-condensed gas is discharged to the external treatment device; the mixture entering the evaporation tank 12 is heated and evaporated, and further heated and desorbed by saturated steam. A small part of the concentrated liquid after desorption enters the mixing tank 11, and most of the concentrated liquid is discharged to the external collection device two, and the part carried by the saturated steam is compressed by the compressor unit 20 and enters the adsorption analysis module 50 for adsorption, and the condensate after adsorption and analysis is discharged to the external collection device three, and the steam is discharged to the mixing tank 11 for recycling.

Claims

1. A steam circulation system, characterized in that: The invention comprises a steam desorption device (10), a compressor unit (20) and an adsorption analysis module (50), wherein the steam desorption device (10), the compressor unit (20) and the adsorption analysis module (50) are sequentially connected via a steam pipe to form a steam circulation loop, and further comprises a cold water tank (30) and a steam generator (40), wherein the cold water tank (30) comprises an outer shell (31) and an inner shell (32) arranged inside the outer shell (31), wherein a cavity is arranged between the outer shell (31) and the inner shell (32), and wherein the cavity is filled with a heat insulation layer (33); wherein the compressor unit (20) comprises at least two compressors (21) arranged in series via a steam pipe, wherein the compressors (21) ) is provided with a heat conducting pipe (22), the heat conducting pipe (22) is coiled and arranged on the surface of the compressor (21) and is in contact with the surface of the compressor (21), the cold water tank (30) is provided with a cold water outlet and a cold water return outlet, the two ends of the heat conducting pipe (22) are respectively connected to the cold water outlet and the cold water return outlet through corresponding cooling water pipes, so that the cold water tank (30) and the compressor unit (20) are connected through the cooling water pipe to form a cooling water circulation loop, and the hot water discharge port (34) of the cold water tank (30) is connected to the water inlet of the steam generator (40), and the steam discharge port of the steam generator (40) is connected to the steam inlet of the adsorption analysis module (50) through a steam pipe.

2. The steam cycle system according to claim 1, characterized in that: A temperature sensor (35) is provided in the cold water tank (30), and a valve 1 (37) is provided on the hot water discharge port (34).

3. The steam cycle system according to claim 2, characterized in that: The cold water tank (30) is provided with a water inlet (36), and the water inlet (36) is connected to an external water supply device.

4. The steam cycle system according to claim 3, characterized in that: The water inlet (36) is provided with a second valve (38).

5. The steam cycle system according to claim 1, characterized in that: A water pump (39) is provided on the cooling water circulation loop.

6. The steam cycle system according to claim 1, characterized in that: A valve three (60) is provided on the steam pipe connecting the steam discharge port of the steam generator (40) and the steam inlet of the adsorption and analysis module (50).

7. The steam cycle system according to any one of claims 1 to 6, characterized in that: The adsorption and analysis module (50) comprises at least two adsorption and analysis devices (51) arranged in parallel.

8. The steam cycle system according to any one of claims 1 to 6, characterized in that: The steam desorption device (10) comprises a mixing tank (11) and an evaporation tank (12); the steam inlet of the mixing tank (11) is connected to the steam outlet of the adsorption analysis module (50); the steam outlet of the mixing tank (11) is connected to the steam inlet of the evaporation tank (12); the solvent inlet of the mixing tank (11) is connected to the solvent feeding device (70); and the steam outlet of the evaporation tank (12) is connected to the steam inlet of the compressor unit (20).

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