CN207493234U - A kind of MVR evaporator structure - Google Patents

Abstract

An MVR evaporator structure comprises a steam compressor, a heater, a gas-liquid separator, a steam generator and a heat exchanger, wherein a first pipe body is communicated with the steam compressor and the heater, a second pipe body is communicated with the heater and the gas-liquid separator and is provided with the heat exchanger, and the heat exchanger is provided with at least three ports; the first inlet end of the heat exchanger is communicated with the first pipe body; the second inlet end of the heat exchanger is communicated with an outlet pipeline of the steam generator; the outlet end of the heat exchanger is communicated with the second pipe body. The secondary steam with the improved enthalpy value is quickly blown to the gas-liquid separator and bubbles on the liquid level are eliminated, the bubbles can be well eliminated, and the secondary steam in the second pipe body is heated by the primary steam with higher temperature, so that the bubble eliminating effect is good.

Description

A kind of MVR evaporator structure

technical field

The utility model relates to an evaporation device in a pharmaceutical equipment system, in particular to an MVR evaporator structure.

Background technique

MVR evaporator, also known as mechanical vapor recompression evaporator, is a new type of high-efficiency and energy-saving evaporation equipment mainly used in the pharmaceutical industry. It is an internationally advanced evaporation technology and an upgraded product that replaces traditional evaporators.

As shown in Figure 1, the existing MVR evaporator mainly includes a steam compressor 101, a heater 103, a second pipe body 104, and a gas-liquid separator 105, and the steam compressor communicates with the heater through the first steam pipe body 102 to heat The device communicates with the gas-liquid separator 105 through the second pipe body 104 . The liquid medicine vapor is pressurized by a steam compressor, heated by a heater, and enters the gas-liquid separator to perform gas-liquid separation, wherein the gas separated by the gas-liquid separator returns to the steam compressor 101 through the third pipe body 106 , the liquid separated by the gas-liquid separator is discharged as a liquid medicine. Wherein the function of the second pipe body 104 is to quickly blow out the secondary steam that comes out of the steam compressor 101 and is heated by the heater 103 through the second pipe body 104, so as to eliminate the Bubbles on the liquid surface.

However, since the MVR evaporator system is in a near-vacuum state, the boiling point of water is about 60° C., so the secondary steam blown out from the second tube body 104 is not high. For some medicinal liquids with less foam, the air bubbles on the liquid surface in the gas-liquid separator can be blown out only by using the wind force generated by the rapid blowing of the secondary steam; while for some medicinal liquids with more foam , the wind force generated by the rapid blowing of the secondary steam alone cannot eliminate most of the air bubbles, so it is necessary to use the heater 103 to heat the secondary steam, and use the secondary steam with relatively high temperature after heating to flow from the second pipe 104 blown out, its high temperature can reduce the surface tension of the bubbles, so that the bubbles are easily broken by the wind generated by the secondary steam blown out. The disadvantages of using the heater to heat the secondary steam are: first, the heater heats the gas, the heat transfer efficiency is low, and the energy loss is high; second, the initial temperature of the secondary steam is low, and it is limited by the size of the heater equipment. The effective heating part is generally not large, so the heating time of the high-speed secondary steam in the heater is relatively short, and the power of the heater is limited, so the temperature of the secondary steam is still not high after being heated by the heater. The low secondary steam cannot well eliminate the air bubbles on the liquid surface in the gas-liquid separator.

Contents of the invention

The utility model aims at providing an MVR evaporator structure which can effectively increase the temperature of the secondary steam in the second pipe body.

An MVR evaporator structure, including a steam compressor, a heater, a gas-liquid separator, a steam generator, and a heat exchanger, the first pipe communicates with the steam compressor and the heater, and the second pipe communicates with the heater and the gas-liquid The separator is provided with a heat exchanger, and the heat exchanger has at least three ports; the first inlet port of the heat exchanger is connected to the first pipe body; the second inlet port of the heat exchanger is connected to the outlet pipe of the steam generator; the heat exchanger The outlet end communicates with the second pipe body.

Since the heat exchanger is set up, and the primary steam is exchanged with the secondary steam of the second pipe through the heat exchanger, the enthalpy of the secondary steam is increased; the secondary steam with the increased enthalpy value is quickly blown into the air The liquid separator and eliminate the bubbles on the liquid surface, because of its high temperature can reduce the surface tension of the bubbles, and the fast secondary steam can eliminate the bubbles well; and use the higher temperature primary steam to heat the second pipe body Secondary steam, the effect of eliminating air bubbles is good.

Description of drawings

Fig. 1 is the structural schematic diagram of existing MVR evaporator;

Figure 2 is a schematic diagram of the structure of the MVR evaporator;

Figure 3 is a schematic diagram of the connection between the heat exchanger and the MVR evaporator.

Detailed ways

As shown in Figures 2 and 3, the MVR evaporator includes a steam compressor 101, a heater 103, a second pipe body 104, a gas-liquid separator 105, and a steam generator. The liquid medicine enters the steam compressor 101, and the steam compressor The outlet end of the heater 103 is communicated with the first inlet port of the heater 103 through the first pipe body 102, and the outlet end of the heater 103 is communicated with the gas-liquid separator 105 through the second pipe body 104, and the gas separated by the gas-liquid separator 105 passes through the third The pipe body 106 flows back to the steam compressor, and the liquid medicine separated by the gas-liquid separator 105 flows out of the MVR evaporator, and a heat exchanger 207 is set. The heat exchanger has at least three ports, and the first inlet port 308 of the heat exchanger is connected to the first The pipe body 102, the outlet port 311 of the heat exchanger communicates with the second pipe body 311, the second inlet port 310 of the heat exchanger communicates with the outlet pipe of the steam generator, the first inlet port 308, the outlet port 311 and the second pipe body of the heat exchanger The pipe sections where the two inlets are located are provided with valves. The second inlet 310 of the heat exchanger 207 is connected to the outlet pipe of the steam generator, and primary steam, namely water vapor, is generated in the steam generator.

The stock solution of the medicinal liquid is pressurized by a steam compressor to become a secondary steam, and after being heated by a heater, the secondary steam enters the gas-liquid separator for gas-liquid separation. The gas separated by the gas-liquid separator returns to the vapor compressor 101 through the third pipe body 106, and the liquid separated by the gas-liquid separator is discharged as a liquid medicine. Wherein the function of the second pipe body 104 is to quickly blow out the secondary steam that comes out of the steam compressor 101 and is heated by the heater 103 through the second pipe body 104, so as to eliminate the Bubbles on the liquid surface. The function of the heat exchanger 207 provided in the present invention is to divert a small part of the secondary steam from the steam compressor 101 to the heat exchanger 207, and then introduce it into the boiler through the second inlet port 310 of the heat exchanger to generate a relatively high temperature The primary steam is used to heat the secondary steam from the second pipe body. Since the MVR evaporator has a structure similar to a tube heat exchanger, the primary steam and the secondary steam can exchange heat but will not mix with each other; the temperature of the secondary steam in the second tube is high enough to reduce the surface tension of the bubbles. The second pipe body 104 quickly blows out relatively high-temperature secondary steam to the gas-liquid separator 105, which can effectively eliminate the bubbles on the liquid surface in the gas-liquid separator 105, and the essence of the secondary steam is liquid medicine, so it will not affect the gas-liquid separator 105. The liquid medicine brings impurities or affects its concentration. In addition, if the foam produced by the liquid medicine is less, when the heat exchanger 207 is not needed, the valve 309 of the pipe section where the first inlet port, the outlet port, and the second inlet port of the heat exchanger are located can be closed, and the new model can be used as an ordinary MVR Evaporator used.

It should be pointed out that the pressure of the primary steam passing into the heat exchanger is 0.05-0.15MPa, the temperature of the liquid medicine in the MVR is 90-99°C, and the vacuum degree is -5kpa--30kpa.

Further, in order to provide better sealing performance, the valves on the second inlet port, the outlet port and the first inlet port of the heat exchanger are butterfly valves.

Further, in order to ensure the cleanliness of the primary steam entering the heat exchanger 207, a steam filter is provided on the pipeline where the second inlet port is located, and the two ends of the steam filter communicate with the second inlet port and the steam generator respectively.

Claims (4)

1. An MVR evaporator structure, including a steam generator, a steam compressor (101), a heater (103), a gas-liquid separator (105), a heat exchanger (207), and the first pipe (102) communicates with The steam compressor (101) and the heater (103), the second pipe body (104) communicate with the heater (103) and the gas-liquid separator (105), and it is characterized in that: a heat exchanger (207) is provided to exchange heat The device has at least three ports; the first inlet port of the heat exchanger (308) is connected to the first pipe body (102); the second inlet port of the heat exchanger is connected to the outlet pipe of the steam generator; the outlet port of the heat exchanger (311 ) communicates with the second pipe body (104). 2. A MVR evaporator structure according to claim 1, characterized in that: the first inlet port (308), the outlet port (311) and the second inlet port (310) of the heat exchanger are all provided with valve. 3. The MVR evaporator structure according to claim 2, characterized in that: the valves on the pipe sections where the second inlet port, outlet port (311) and first inlet port (308) of the heat exchanger are located are butterfly valves. 4. A kind of MVR evaporator structure according to claim 1, characterized in that: a steam filter is arranged on the pipeline where the second inlet port is located, and the two ends of the steam filter communicate with the second inlet port and the steam generator respectively .