Thermal desalted water flash evaporation device

Abstract

The utility model discloses a flash evaporation device for thermal desalted water, which consists of a flash evaporation tank 1, a rotational flow water inlet pipe 2, a flow guide annular groove 3, a water catcher 4, a vortex baffle 5, a safety valve 6, a water inlet regulating valve 7, a water outlet regulating valve 8, a flash steam regulating valve 9 and a differential pressure liquid level meter 10. The saturated steam is flashed out to heat the waste effect device, so that the problems of cooling the hot desalted water and utilizing the heat energy are solved, the maximum utilization of the heat energy is realized, and compared with the traditional mode of simply cooling the hot desalted water, not only is the cooling cost reduced, but also the heat energy is recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of flash evaporation utilization of thermal desalted water, and directly relates to a flash evaporation device of thermal desalted water. Background Art

[0002] At present, a lot of high-temperature desalted water that needs to be cooled is generated in chemical production. The traditional treatment method uses circulating water for cooling. Cooling the desalted water with circulating water not only wastes a lot of circulating water, but also requires investment in the installation of cooling equipment, consumes electricity, and has high costs. Our company adopts the model of integrated development of chemical industry and food processing, reusing the heat energy in the high-temperature desalted water in chemical production, and using the flash evaporation to extract the heat energy to the waste heat evaporator. It is very necessary to study a hot desalted water flash evaporation device. Summary of the invention

[0003] The purpose of the utility model is to study a thermal desalted water flash evaporation device to solve the problem of secondary utilization of the thermal desalted water energy. The technical solution is:

[0004] The utility model discloses a hot desalted water flash evaporation device, which is composed of a flash evaporation tank, a swirl water inlet pipe, a guide annular groove, a water catcher, a vortex baffle, a safety valve, a water inlet regulating valve, a water outlet regulating valve, a flash steam regulating valve and a differential pressure level gauge. The utility model is characterized in that the swirl water inlet pipe and the guide annular groove are installed in the middle of the flash evaporation tank; the water catcher is installed on the top of the flash evaporation tank; the vortex baffle and the differential pressure level gauge are installed at the bottom of the flash evaporation tank; the safety valve, the water inlet regulating valve, the water outlet regulating valve and the flash steam regulating valve are connected with the flash evaporation tank through a pipeline.

[0005] The hot desalted water (temperature 115℃, pressure 1.35MPa) in chemical production enters the flash tank through the water inlet regulating valve and the swirl water inlet pipe. After passing through the swirl liquid inlet pipe and the guide annular groove in the tangential direction, the hot desalted water becomes saturated steam and desalted water under part of the container pressure due to the sudden pressure drop; the saturated steam goes up through the water collector to collect the desalted water, and then the saturated steam enters the waste heat evaporator through the saturated steam regulating valve for utilization; the desalted water descends under the action of gravity through the vortex baffle and the water outlet regulating valve to enter other equipment. The hot desalted water is flashed in the flash tank by reducing the pressure (1.35MPa→-40KPa) and the temperature (115℃→85℃). The heat energy in the hot desalted water is mainly transferred to the saturated steam and utilized in the waste heat evaporator.

[0006] Preferably, the swirl water inlet pipe and the guide annular groove are installed in cooperation to ensure that the hot desalted water enters the guide annular groove along the tangential direction at the outlet of the swirl water inlet pipe and is evenly distributed to the flash tank in the guide annular groove. When the pressure is reduced, the heat energy of the hot desalted water is transferred to the saturated steam of the flash.

[0007] Preferably, the water inlet regulating valve and the flash steam regulating valve are electrically connected, and the opening of the flash steam regulating valve ensures a slightly negative pressure state (-40 KPa) in the flash tank, thereby ensuring the best flash evaporation effect of the hot desalted water.

[0008] Preferably, the water outlet regulating valve and the differential pressure level gauge are electrically connected to ensure the level of desalted water in the flash tank and ensure the best flash effect of the flash tank.

[0009] Preferably, the vortex baffle is vertically installed at the bottom of the flash tank to prevent the desalted water after flash evaporation from generating vortex phenomenon at the bottom of the flash tank.

[0010] Preferably, the water trap is installed on the top of the flash tank to prevent the effective separation of saturated steam and desalted water.

[0011] Beneficial effects of the utility model:

[0012] The high-temperature hot desalted water in the company enters the flash tank at 115℃ (or above 115℃), and generates 85℃ saturated steam through flash evaporation at an operating pressure of -40KPa. The steam enters the waste efficiency device as a heat source, and the low-temperature hot water of about 85℃ discharged from the bottom of the flash tank is pumped to the subsequent device as a heat source or recycled through a low-temperature hot water pump. This not only solves the problem of cooling the hot desalted water, but also uses the recovered heat energy in production, achieving the purpose of both cooling and recovering heat energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 A schematic diagram showing the structure of a thermal desalted water flash evaporation device of the utility model is shown.

[0014] Description of Reference Numerals

[0015] 1. Flash tank; 2. Swirl water inlet pipe; 3. Diversion annular groove; 4. Water catcher; 5. Vortex baffle; 6. Safety valve; 7. Water inlet regulating valve 8. Water outlet regulating valve; 9. Flash steam regulating valve; 10. Differential pressure level gauge. DETAILED DESCRIPTION

[0016] The high-temperature hot desalted water of 115℃ (or above 115℃) in the company passes through the water inlet regulating valve and the swirl water inlet pipe along the tangential direction into the guide annular groove in the flash tank, and is evenly distributed in the guide annular groove to the flash tank. It flashes in the tank under the operating pressure of -40KPa to produce 85℃ saturated steam through flash evaporation. The saturated steam passes through the water trap and the flash steam regulating valve and enters the waste effect device as a heat source; the desalted water at the bottom of the flash tank passes through the vortex baffle and the water outlet regulating valve, and then enters the desalted water pump to the subsequent device as a heat source or circulating water. It not only solves the problem of cooling the hot desalted water, but also uses the recovered heat energy in production, achieving the purpose of both cooling and recovering heat energy.

Claims

1. A thermal desalted water flash evaporation device, comprising: a flash evaporation tank (1), a vortex water inlet pipe (2), a guide annular groove (3), a water trap (4), a vortex baffle (5), a safety valve (6), a water inlet regulating valve (7), a water outlet regulating valve (8), a flash steam regulating valve (9), and a differential pressure level gauge (10), wherein: A vortex water inlet pipe (2) and a guide annular groove (3) are installed in the middle of the flash tank (1); a water trap (4) is installed on the top of the flash tank (1); a vortex baffle (5) and a differential pressure level gauge (10) are installed on the bottom of the flash tank (1); and a safety valve (6), a water inlet regulating valve (7), a water outlet regulating valve (8), and a flash steam regulating valve (9) are connected to the flash tank (1) through pipelines.

2. A thermal desalted water flash evaporation device according to claim 1, characterized in that: The swirl water inlet pipe (2) and the guide annular groove (3) are installed in coordination to ensure that after the hot desalted water enters the guide annular groove along the tangential direction at the outlet of the swirl water inlet pipe (2), the heat energy of the hot desalted water is transferred to the flash steam under the condition of reduced pressure.

3. A thermal desalted water flash evaporation device according to claim 1, characterized in that: The water inlet regulating valve (7) and the flash steam regulating valve (9); the water outlet regulating valve (8) and the differential pressure level gauge (10) are electrically connected to ensure an optimal flash evaporation effect of the flash tank (1).

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