Vacuum pressure reduction and flow stabilization device for evaporator

Abstract

The utility model discloses a vacuum pressure-reducing and flow-stabilizing device for an evaporator, relates to the technical field of steam heat exchange, and aims to solve the technical problems that in the prior art, some production materials cannot use too high temperature, the steam temperature is higher than 100 DEG C under a normal working condition, and the device is not suitable for a high-temperature environment; and the heat exchange coefficient of water is obviously lower than that of steam heat exchange, so that the heat exchange efficiency is low. The evaporation heat exchange system comprises an input end, a steam flow regulating valve, evaporation concentration equipment, a water ring type vacuum pump and a steam-water separator, the steam flow regulating valve is arranged and connected between the input end and the evaporation concentration equipment, and the water ring type vacuum pump is arranged and connected between the evaporation concentration equipment and the circulation end; according to the evaporation heat exchange system, a steam pipeline is used for conveying steam, a water ring type vacuum pump is used for reducing pressure of the steam pipeline, a steam flow adjusting valve is used for controlling the flow of steam in the steam pipeline, and a pressure reducing valve is arranged between the input end and the steam flow adjusting valve. And a steam buffer tank is arranged between the steam flow regulating valve and the evaporation concentration equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of steam heat exchange, in particular to a vacuum decompression and flow stabilizing device for an evaporator. Background Art

[0002] Evaporation is the physical process of converting liquid into gas. Generally speaking, an evaporator is an object that converts liquid substances into gas. There are a large number of evaporators in industry, and the evaporator used in evaporation and concentration equipment is one of them;

[0003] However, some production materials cannot be used at too high a temperature, and under normal working conditions, the steam temperature is higher than 100 degrees Celsius, which is not suitable for high temperature environments. The heat transfer coefficient of water is significantly lower than that of steam, and the heat transfer efficiency is low. Therefore, the market urgently needs to develop a vacuum decompression and flow stabilization device for evaporators to help people solve existing problems. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum decompression and flow stabilizing device for an evaporator, so as to solve the problem in the current steam heat exchange work proposed in the above background technology that some production materials cannot be used at too high a temperature and need to be heat exchanged in a low temperature environment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum decompression and flow stabilizing device for an evaporator, comprising an evaporative heat exchange system and a vacuum pump cooling system, wherein the evaporative heat exchange system comprises an input end, a steam flow regulating valve, an evaporative concentration device, a water ring vacuum pump and a steam-water separator, a steam flow regulating valve is arranged between the input end and the evaporative concentration device, a water ring vacuum pump is arranged between the evaporative concentration device and a circulation end, the evaporative heat exchange system uses a steam pipeline to transport steam, uses the water ring vacuum pump to decompress the steam pipeline, and uses the steam flow regulating valve to control the steam flow inside the steam pipeline.

[0006] Through the above technical scheme, a water ring vacuum pump is used to extract air from the pipeline in the evaporative heat exchange system, reduce the pressure of the entire system, and form a negative pressure lower than the atmospheric pressure, so that the steam can flow at 100 degrees Celsius without condensing into water, thereby realizing the decompression work of the evaporator. At the same time, in the process of conveying steam, a steam flow regulating valve is used to cooperate with the water ring vacuum pump to stabilize the pressure of the pipeline, so that the entire system is in a preset negative pressure environment and maintained within a certain range, which plays a role in stabilizing the pressure, so that the steam entering the evaporative heat exchange system can be at a lower temperature to meet the temperature standards of material production, achieve the effect of low-temperature heat exchange, and provide a more reliable, efficient and stable heat exchange solution.

[0007] In a preferred example, the utility model can be further configured as follows: a pressure reducing valve is provided between the input end and the steam flow regulating valve.

[0008] Through the above technical solution, the pressure reducing valve is used to reduce the pressure of the input steam so that it meets the pressure of the entire system.

[0009] In a preferred example, the utility model can be further configured as follows: a steam buffer tank is provided between the steam flow regulating valve and the evaporation concentration device, and a cooling water input pipe and a cooling water recovery pipe are respectively connected to the steam buffer tank.

[0010] Through the above technical solution, the steam buffer tank is used to stabilize the pressure and temperature of the entire system. The steam pressure difference before and after the steam flow regulating valve is large, which may cause steam overheating. The steam temperature in the steam buffer tank is adjusted by controlling the flow rate of cooling water input, so that the steam pressure and temperature entering the evaporation concentration equipment are more stable, thereby ensuring the heat exchange performance.

[0011] In a preferred example, the utility model can be further configured as follows: a drainage pipe and a steam exhaust pipe are respectively provided at the ends of the steam-water separator.

[0012] In a preferred example, the utility model can be further configured as follows: the vacuum pump cooling system includes a circulating water mechanism, a cooler, a drainage end, a steam exhaust end and a cooling water mechanism, the water ring vacuum pump is connected to the circulating water mechanism, the drainage end and the steam exhaust end, and the cooler is connected to the circulating water mechanism and the cooling water mechanism.

[0013] Through the above technical solution, the vacuum pump cooling system is used to cool the water ring vacuum pump to ensure the stable operation of the water ring vacuum pump, thereby avoiding overheating of the vacuum pump and making the decompression work of the evaporator more stable.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model utilizes a water ring vacuum pump to extract air from the pipeline in the evaporative heat exchange system, decompresses the entire system, and forms a negative pressure that is lower than the atmospheric pressure, so that the steam can flow at 100 degrees Celsius and does not condense into water, thereby achieving the decompression work of the evaporator. At the same time, in the process of conveying steam, a steam flow regulating valve is used in conjunction with the water ring vacuum pump to stabilize the pressure of the pipeline, so that the entire system is in a preset negative pressure environment and maintained within a certain range, thereby playing a role in stabilizing the pressure, so that the steam entering the evaporative heat exchange system can be at a lower temperature, meet the temperature standards of material production, achieve the effect of low-temperature heat exchange, and provide a more reliable, efficient and stable heat exchange solution.

[0016] 2. The utility model uses a pressure reducing valve to reduce the pressure of the input steam so that it meets the pressure of the entire system, and uses a steam buffer tank to stabilize the pressure and temperature of the entire system. The steam pressure difference before and after the steam flow regulating valve is large, which may cause steam overheating. The steam temperature in the steam buffer tank is adjusted by controlling the flow rate of cooling water input, so that the steam pressure and temperature entering the evaporation concentration equipment are more stable, ensuring the heat exchange performance.

[0017] 3. The utility model utilizes the vacuum pump cooling system to cool the water ring vacuum pump, thereby ensuring the stable operation of the water ring vacuum pump, thereby avoiding overheating of the vacuum pump and making the decompression operation of the evaporator more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the principle of the evaporative heat exchange system of the utility model;

[0019] Figure 2 It is a schematic diagram of the principle of the vacuum pump cooling system of the utility model. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1 The utility model provides an embodiment: a vacuum decompression and flow stabilizing device for an evaporator, comprising an evaporative heat exchange system and a vacuum pump cooling system, the evaporative heat exchange system comprising an input end, a steam flow regulating valve, an evaporative concentration device, a water ring vacuum pump and a steam-water separator, a steam flow regulating valve is arranged between the input end and the evaporative concentration device, a water ring vacuum pump is arranged between the evaporative concentration device and a circulation end, the evaporative heat exchange system uses a steam pipeline to transport steam, uses a water ring vacuum pump to decompress the steam pipeline, and uses a steam flow regulating valve to control the steam flow inside the steam pipeline.

[0022] See also Figure 1 A pressure reducing valve is arranged between the input end and the steam flow regulating valve.

[0023] See also Figure 1 A steam buffer tank is arranged between the steam flow regulating valve and the evaporation concentration equipment.

[0024] See also Figure 1 A drainage pipe and a steam exhaust pipe are respectively arranged at the ends of the steam-water separator.

[0025] See also Figure 2 The vacuum pump cooling system includes a circulating water mechanism, a cooler, a drainage end, a steam exhaust end and a cooling water mechanism.

[0026] See also Figure 2 The water ring vacuum pump is connected to the circulating water mechanism, the drainage end and the exhaust end, and the cooler is connected to the circulating water mechanism and the cooling water mechanism.

[0027] Working principle: When in use, the air inside the pipes in the entire evaporative heat exchange system of the water ring vacuum pump is used to reduce the system pressure to the specified pressure, and then the saturated steam is input into the evaporative heat exchange system from the input end, first the pressure is reduced by the pressure reducing valve, and then the steam flow is adjusted by the steam flow regulating valve to adjust it to a flow rate consistent with the system pressure. During the transportation process, the steam buffer tank is used to stabilize the pressure and cool it down so that its temperature meets the material production temperature, and then the steam is input into the evaporative concentration equipment. The steam enters the evaporative concentration equipment to carry away the heat generated by the material and transport it in the direction of the water ring vacuum pump. The steam passes through the water ring vacuum pump and uses the steam-water separator to separate the steam and water and discharge them into the drainage pipe and the exhaust pipe respectively, and the steam is discharged into the atmosphere, and the circulating water mechanism is connected to the water ring vacuum pump to extract the hot water inside the water ring vacuum pump and flow it through the cooler, and then the cooling water mechanism is used to water-cool the cooler, thereby realizing heat exchange and cooling the water ring vacuum pump.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A vacuum decompression and flow stabilizing device for an evaporator, comprising an evaporation heat exchange system and a vacuum pump cooling system, characterized in that: The evaporative heat exchange system includes an input end, a steam flow regulating valve, an evaporative concentration device, a water ring vacuum pump and a steam-water separator. A steam flow regulating valve is provided between the input end and the evaporative concentration device, and a water ring vacuum pump is provided between the evaporative concentration device and a circulation end. The evaporative heat exchange system uses a steam pipeline to transport steam, uses the water ring vacuum pump to reduce the pressure of the steam pipeline, and uses the steam flow regulating valve to control the steam flow inside the steam pipeline.

2. The vacuum decompression and flow stabilizing device for an evaporator according to claim 1, characterized in that: A pressure reducing valve is arranged between the input end and the steam flow regulating valve.

3. The vacuum decompression and flow stabilizing device for an evaporator according to claim 1, characterized in that: A steam buffer tank is arranged between the steam flow regulating valve and the evaporation concentration equipment, and a cooling water input pipe and a cooling water recovery pipe are respectively connected to the steam buffer tank.

4. The vacuum decompression and flow stabilizing device for an evaporator according to claim 1, characterized in that: A drainage pipe and a steam exhaust pipe are respectively arranged at the ends of the steam-water separator.

5. The vacuum decompression and flow stabilizing device for an evaporator according to claim 1, characterized in that: The vacuum pump cooling system comprises a circulating water mechanism, a cooler, a drainage end, a steam exhaust end and a cooling water mechanism.

6. The vacuum decompression and flow stabilizing device for an evaporator according to claim 5, characterized in that: The water ring vacuum pump is connected with the circulating water mechanism, the drainage end and the exhaust steam end, and the cooler is connected with the circulating water mechanism and the cooling water mechanism.

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