CN107670316B

CN107670316B - MVR evaporator structure with integrated gas-liquid separation structure

Info

Publication number: CN107670316B
Application number: CN201711043086.6A
Authority: CN
Inventors: 吕江强
Original assignee: Jiangyin Jirui Machine Manufacturing Co ltd
Current assignee: Jiangyin Jirui Machine Manufacturing Co ltd
Priority date: 2017-10-31
Filing date: 2017-10-31
Publication date: 2023-09-15
Anticipated expiration: 2037-10-31
Also published as: CN107670316A

Abstract

The invention relates to an MVR evaporator structure with an integrated gas-liquid separation structure, which comprises a shell (1), wherein an evaporation tube bundle (2) is arranged inside the shell (1), and a secondary evaporation tube (3) is arranged at the central axis in the shell (1), and is characterized in that: the bottom of the shell (1) is provided with a gas-liquid separator (6), the gas-liquid separator (6) is detachably connected with the bottom of the shell (1), and an inner cavity surrounded by the shell (1) and the gas-liquid separator (6) is a closed cavity. The invention effectively reduces the occupied area of the equipment and can eliminate foam generated by feed liquid.

Description

MVR evaporator structure with integrated gas-liquid separation structure

Technical Field

The invention relates to an MVR evaporation system, in particular to an MVR evaporator structure with an integrated gas-liquid separation structure. Belongs to the technical field of evaporators.

Background

With the development of industrial technology, mechanical Vapor Recompression (MVR), also called direct heat pump technology, usually uses electricity as energy, and utilizes a vapor compressor to raise the pressure and temperature of secondary vapor and return the secondary vapor to an evaporator for reuse, thereby maximally utilizing the heat energy in the secondary vapor, and the Mechanical Vapor Recompression (MVR) technology is used in the field of industrial wastewater, including chemical wastewater, pharmaceutical wastewater, high-salt wastewater, dye wastewater, electroplating wastewater and the like; the food industry field includes evaporating and concentrating fruit juice, milk and sucrose; the pharmaceutical field comprises traditional Chinese medicine concentration, vitamin and amino acid evaporation concentration; the chemical industry fields including evaporation, concentration, crystallization, etc. are increasingly widely used, but in the current MVR application systems, there are the following drawbacks:

1. the gas-liquid separator is arranged outside the main body of the equipment, so that the occupied area of the equipment is increased;

2. when in separation, a defoaming device is not arranged, and foam is easily generated when feed liquid directly flows downwards;

3. foam is easily led into a vacuum pipeline along with gas, and the steam compressor can be damaged due to the fact that the foam can reach the steam compressor in extreme cases.

Disclosure of Invention

The invention aims to solve the technical problem of providing an MVR evaporator structure with an integrated gas-liquid separation structure aiming at the prior art, so that the occupied area of equipment is reduced, and meanwhile, foam generated by feed liquid can be eliminated.

The invention solves the problems by adopting the following technical scheme: the utility model provides a MVR evaporator structure with integral type gas-liquid separation structure, includes the casing the evaporation tube bank has been arranged to the casing inside the axis department in the casing is provided with the secondary steam pipe the gas-liquid separator is installed to the bottom of casing, detachable connection between gas-liquid separator and the bottom of casing is enclosed the inner chamber that constitutes by casing and gas-liquid separator.

Preferably, the gas-liquid separator comprises a guide plate with a downward drainage function, the guide plate forms a plurality of gas-liquid separation chambers by arranging a plurality of baffles along the radial direction, and a material outlet is arranged in each gas-liquid separation chamber.

Preferably, the defoaming device is arranged at the lower part of the shell and at the outlet position of the evaporation tube bundle, the defoaming device comprises a cover shell and a ladder plate, the cover shell is open at the top and is communicated with the bottom of the secondary vapor tube, the cross section of the cover shell is conical, the ladder plate is arranged from top to bottom along the outer surface of the cover shell, and foam falls onto the ladder plate of the defoaming device from the evaporation tube and flows downwards along the ladder plate with a certain gradient.

Preferably, a plurality of partitions are provided on the housing, the partitions being arranged along a gradient direction of the ladder.

Compared with the prior art, the invention has the advantages that:

1. the gas-liquid separator and the evaporator are integrated together, so that the occupied space of equipment is reduced, and the gas-liquid separator and the evaporator are detachable, so that the maintenance and the cleaning are convenient;

2. the defoaming device is arranged at the bottom of the tube bundle of the evaporator, so that feed liquid does not directly fall into the liquid collector, foam is prevented from being led into the pipeline along with gas, and the hidden trouble of damage to the vapor compressor is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a top view of the defoaming device of the present invention.

Fig. 3 is a side view of fig. 2.

FIG. 4 is a top view of a gas-liquid separator according to the present invention.

Fig. 5 is a side view of fig. 4.

Wherein:

shell 1

Evaporating tube bundle 2

Secondary steam pipe 3

Defoaming device 4

Housing 4.1

Ladder plate 4.2

Baffle 4.3

Cloth room 5

Gas-liquid separator 6

Deflector 6.1

Baffle 6.2

Gas-liquid separation chamber 6.3

And a material outlet 6.4.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1, the MVR evaporator structure with an integrated gas-liquid separation structure comprises a shell 1, wherein an inner cavity surrounded by the shell 1 is a closed cavity, an evaporation tube bundle 2 is arranged in the shell 1, a distribution chamber 5 is arranged at the top of the evaporation tube bundle 2, a secondary vapor tube 3 is arranged at the central axis in the shell 1 and is used for discharging vapor generated during evaporation, a defoaming device 4 is arranged at the lower part of the shell 1, materials are sent into the shell 1 through the distribution chamber 5 and flow along the outer walls of each evaporation tube of the evaporation tube bundle 2 from top to bottom, naturally form a film under the action of gravity, heated vapor enters each evaporation tube through an inlet and exchanges heat with the tube wall of the material liquid, condensed water is formed after heat exchange of the heated vapor, the condensed water is discharged from a water outlet along the evaporation tube, the liquid film absorbs a large amount of heat and then rapidly increases in temperature, the condensed water is boiled and evaporated at a low temperature under negative pressure, finally flows to the bottom of the evaporation tube bundle 2, and is flashed under the action of the negative pressure, the residual liquid is the concentrated liquid of the material liquid, the liquid is directly and easily foam is generated by the downward flow, and can flow into the gas pipeline, the foam is automatically generated, the foam is naturally generated, and flows through the gas pipeline, and flows through the foam device and is automatically connected with the bottom of the shell 1, and the separator 6 is arranged at the bottom of the separator 1.

As shown in fig. 2 and 3, the defoaming device 4 comprises a housing 4.1 and a ladder plate 4.2, the housing 4.1 is open at the top and is communicated with the bottom of the secondary steam pipe 3, the section of the housing is conical, the ladder plate 4.2 is arranged along the outer surface of the housing 4.1 from top to bottom, foam falls onto the ladder plate 4.2 of the defoaming device from the evaporation pipe and flows downwards along the ladder plate with a certain gradient, and automatic breakage is eliminated due to the action of the ladder plate in the flowing process. In order to uniformly distribute the flow of foam on the defoaming device, a plurality of partition plates 4.3 are arranged on the housing 4.1, and the partition plates 4.3 are arranged along the gradient direction of the ladder plate 4.2 so as to divide the defoaming device into a plurality of areas for defoaming. It can be seen from the figure that a gap is left between the edge of the housing 4.1 of the de-foaming device 4 and the housing 1, so that the de-foaming feed liquid falls downwards into the gas-liquid separator 6.

As shown in fig. 4 and 5, the gas-liquid separator 6 includes a baffle 6.1, where the baffle 6.1 is in a cone structure, and has the function of collecting the liquid dropped from the defoaming device toward the center, the baffle 6.1 forms a plurality of gas-liquid separation chambers 6.3 by radially arranging a plurality of baffles 6.2, and a material outlet 6.4 is disposed in each gas-liquid separation chamber 6.3, and the material outlet 6.4 is generally located at the center of the baffle 6.1, so that the liquid dropped from the defoaming device is directly discharged from the material outlet 6.4, and the heated steam flows upward and is discharged through the secondary steam tube 3, so as to realize gas-liquid separation.

The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the invention, but is intended to cover modifications, substitutions, improvements, etc. that fall within the spirit and scope of the invention.

Claims

1. MVR evaporator structure with integral type gas-liquid separation structure, including casing (1) inside evaporation tube bank (2) of having arranged evaporation tube bank (2) axis department in casing (1) is provided with secondary vapor tube (3), its characterized in that: the bottom of the shell (1) is provided with a gas-liquid separator (6), the gas-liquid separator (6) is detachably connected with the bottom of the shell (1), and an inner cavity formed by the shell (1) and the gas-liquid separator (6) in a surrounding mode is a closed cavity;

the gas-liquid separator (6) comprises a guide plate (6.1) with a downward drainage function, the guide plate (6.1) forms a plurality of gas-liquid separation chambers (6.3) by arranging a plurality of baffle plates (6.2) along the radial direction, and a material outlet (6.4) is arranged in each gas-liquid separation chamber (6.3);

the utility model discloses a defoaming device, including casing (1), evaporation tube bank (2), be provided with defoaming device (4) in the export position of casing (1), defoaming device (4) include casing (4.1) and riser (4.2), casing (4.1) are open-top and communicate with secondary vapor pipe (3) bottom, and its cross-section is the toper, riser (4.2) are arranged along the surface top-down of casing (4.1), and the foam drops on defoaming device's riser (4.2) from the evaporation tube to follow and be the riser downwardly flowing of certain gradient.

2. The MVR evaporator structure having an integrated vapor-liquid separation structure of claim 1, wherein: a plurality of partition plates (4.3) are arranged on the housing (4.1), and the partition plates (4.3) are arranged along the gradient direction of the ladder plate (4.2).