CN109364506B

CN109364506B - Skid-mounted MVR evaporation device

Info

Publication number: CN109364506B
Application number: CN201811464914.8A
Authority: CN
Inventors: 张化福; 张振涛; 杨鲁伟; 杨俊玲; 张钰; 越云凯
Original assignee: Technical Institute of Physics and Chemistry of CAS
Current assignee: Technical Institute of Physics and Chemistry of CAS
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2021-04-06
Anticipated expiration: 2038-12-03
Also published as: CN109364506A

Abstract

The invention relates to the technical field of evaporation equipment, and provides a skid-mounted MVR evaporation device which comprises a raw material supply system, an evaporation circulation system, a vacuum system and a waste heat recovery system. The invention provides a miniaturized and modularized skid-mounted MVR evaporation device which can fully utilize heat and prevent scaling.

Description

Skid-mounted MVR evaporation device

Technical Field

The invention relates to the technical field of evaporation equipment, in particular to a skid-mounted MVR evaporation device.

Background

The MVR is a short term for a mechanical vapor recompression (mechanical vapor compression) technology, and is an energy-saving technology for reusing energy of secondary vapor generated by the MVR, so as to reduce the demand on external energy. MVR technology has been successfully used in the fields of chemical industry, food, paper making, medicine, seawater desalination, sewage treatment and the like.

The research of the MVR technology mainly comprises three parts of system overall equipment, a vapor compressor, an evaporator and the like. In the novel energy-saving high-concentration wastewater (liquid) technology, the MVR evaporation technology is the most advanced evaporation technology at home and abroad at present, and has the advantages of low energy consumption, environmental protection and the like, the technology fully recovers the waste heat of secondary steam, thereby improving the heat energy of low-grade secondary steam by consuming a small amount of high-grade electric energy, and realizing the cyclic utilization of the secondary steam, effectively improving the energy utilization efficiency of the high-concentration wastewater (liquid) treatment process of the heavy chemical industry, improving the labor productivity, playing an irreplaceable role in the aspects of system energy conservation and environment improvement, greatly reducing the comprehensive energy consumption of the evaporation concentration treatment of the high-concentration wastewater (liquid), and promoting the smooth realization of the energy conservation and emission reduction target of the whole heavy chemical industry.

In China, the MVR evaporation technology is still in the starting stage, no product with independent intellectual property rights exists, and no miniaturized and skid-mounted equipment is formed. The core technology in the MVR system is a compressor, and the most widely applied centrifugal fan or centrifugal compressor, however, the centrifugal compressor has a large volume and is not suitable for miniaturized and skid-mounted equipment.

Disclosure of Invention

Technical problem to be solved

The present invention is directed to solving at least one of the technical problems of the prior art or the related art: (1) the MVR evaporation concentration system cannot realize miniaturization, instrumentization and modularization; (2) the MVR evaporation concentration system is easy to have the problems of scaling and blockage; (3) the MVR evaporation concentration system has low waste heat utilization efficiency and cannot be fully utilized.

The purpose of the invention is: the skid-mounted MVR evaporation device is miniaturized, modularized, skid-mounted, capable of fully utilizing heat and capable of preventing scaling.

(II) technical scheme

In order to solve the technical problems, the invention provides a skid-mounted MVR evaporation device, which comprises a raw material supply system, an evaporation circulation system, a vacuum system and a waste heat recovery system, wherein the raw material supply system comprises a raw material tank and a preheater, the evaporation circulation system comprises an evaporator, a separator, a steam generator, a steam filter and a compressor, the vacuum system comprises a vacuum pump, the waste heat recovery system comprises a water tank, materials in the raw material tank enter the preheater for preheating, the materials enter the evaporator after being preheated, the evaporator is connected with the steam generator, the steam generator provides a heat source for the evaporator, the materials absorb heat in the evaporator and enter the separator, the materials are concentrated in the separator to reach a set concentration and then are discharged, and the materials which do not reach the set concentration in the separator flow back to the evaporator, the steam in the separator enters a steam filter to be filtered and then enters the compressor, the compressor heats and pressurizes the steam and then flows back to the evaporator to provide a heat source for materials in the evaporator, a heat source pipeline of the evaporator is connected with the vacuum pump, the vacuum pump sucks vacuum tail gas in the heat source pipeline, and the vacuum tail gas sucked by the vacuum pump enters the raw material tank to exchange heat and then flows into the water tank.

Preferably, the compressor is a screw-type vapor compressor, the compressor includes a self-lubricating water supply system and an oil supply system,

the self-lubricating water supply system comprises a condensing tank, a water supply pump and a water supply filter, self-lubricating condensed water in the compressor and steam which is pressurized and heated in the compressor flow into a water collection tank, the steam and the condensed water are separated in the water collection tank, the steam enters the evaporator to serve as a heat source, the condensed water enters the condensing tank, and a part of condensed water in the condensing tank returns to the compressor through the water supply pump and the water supply filter to serve as the self-lubricating condensed water;

the oil supply system comprises an oil tank, an oil supply pump and an oil supply filter, wherein the oil tank provides lubricating oil for the compressor, and the lubricating oil flows into the compressor through the oil supply pump and the oil supply filter and then returns to the oil tank from an oil path outlet of the compressor.

In any of the above schemes, preferably, a cooling water heat exchange coil is arranged in a water tank of the waste heat recovery system, and cooling water in the cooling water heat exchange coil exchanges heat in the water tank;

a raw material tank coil is arranged in the raw material tank, and vacuum tail gas pumped by the vacuum pump enters the raw material tank coil for heat exchange and then flows into the water tank;

the preheater comprises a cooling water preheater and a condensate preheater, and the materials in the raw material tank sequentially enter the cooling water preheater and the condensate preheater and flow into the evaporator after being preheated;

a heat absorption coil is arranged in the oil tank, cooling water in the water tank flows into the heat absorption coil, the cooling water in the heat absorption coil exchanges heat with oil liquid in the oil tank, the cooling water in the water tank absorbs heat and then flows into the cooling water preheater as a heat source, materials in the cooling water preheater are preheated for the first time, the cooling water flows back to the water tank after exchanging heat in the cooling water preheater, and the materials flow into the condensate preheater;

and the condensed water in the condensing tank flows into the condensing preheater through the condensing pump to be used as a heat source to carry out secondary preheating on the material in the condensing preheater, and the condensed water after heat exchange is discharged out of the system.

In any of the above schemes, preferably, the connection interface between the vacuum pump and the evaporator is provided with a plurality of connection interfaces at intervals on the evaporator, the vacuum pump is connected with a vacuum regulating valve, the vacuum pump is further connected with a water tank water supply pipeline, and the water tank provides working fluid for the vacuum pump.

In any of the above schemes, preferably, a return pipeline is arranged between the separator and the evaporator, and the return pipeline is connected with an electromagnetic scale-inhibiting and descaling device;

the electromagnetic scale inhibition and scale removal device comprises an electromagnetic transmitting component and a magnetic field receiving component, wherein the electromagnetic transmitting component comprises an induction power supply and an electromagnetic induction coil, alternating current is introduced into the electromagnetic induction coil by the induction power supply, the electromagnetic induction coil is wound on the magnetic field receiving component, and the electromagnetic induction coil generates an alternating magnetic field with the magnetic field intensity of 5000-50000 gauss.

In any of the above schemes, preferably, the magnetic field receiving assembly includes a magnetic gathering core, the magnetic gathering core is disposed in the fluid conveying pipe, the magnetic gathering core is a solid cylinder, and the magnetic gathering core is coaxial with the fluid conveying pipe;

the electromagnetic induction coil is of a hollow spiral pipe structure, the electromagnetic induction coil is communicated with a cooling water coil pipe in the water tank, and cooling water in the electromagnetic induction coil flows back to the electromagnetic induction coil after heat exchange in the water tank;

the turn moment of the electromagnetic induction coil is set to be equal or gradually increased along the current inlet end to the current outlet end.

In any of the above schemes, preferably, the preheater is communicated with the return line, the return line is connected with a forced circulation pump, and the material in the preheater passes through an inlet of the forced circulation pump and the evaporator.

Preferably, in any of the above aspects, further comprising a control system,

the separator is connected with a separator temperature sensor, a separator pressure sensor, a separator flow sensor, a separator liquid level sensor, a separator density sensor, a feeding regulating valve, a discharging regulating valve, a heat supplementing regulating valve and a vacuum regulating valve;

the separator liquid level sensor and the feed regulating valve are both connected to the control system; the separator density sensor and the discharge regulating valve are both connected to the control system; the separator temperature sensor and the heat compensation regulating valve are both connected to the control system;

the condensing tank is connected with a condensing tank liquid level sensor and a condensing regulating valve, and the condensing tank liquid level sensor and the condensing regulating valve are both connected to the control system;

the raw material tank is connected with a raw material tank liquid level sensor and a feed supplement cut-off valve, and the raw material tank liquid level sensor and the feed supplement cut-off valve are connected to the control system;

the water tank is connected with a cooling water pressure sensor and a cooling regulating valve, and the cooling water pressure sensor and the cooling regulating valve are connected to the control system;

the oil tank is connected with an oil supply pressure sensor and an oil supply regulating valve, and the oil supply pressure sensor and the oil supply regulating valve are connected to the control system;

the water tank is connected with a water tank temperature sensor, a water tank liquid level sensor, a cooling cut-off valve, a water replenishing cut-off valve and a water discharging cut-off valve, and the water tank temperature sensor and the cooling cut-off valve are connected to the control system; the water tank liquid level sensor, the water supplementing shut-off valve and the water discharging shut-off valve are connected to the control system.

Preferred in above-mentioned arbitrary scheme still includes the sled dress frame, the evaporimeter with the separator is in the horizontal direction of sled dress frame is installed side by side, steam cleaner connects the top of evaporimeter, the separator with the head tank is in the longitudinal direction of sled dress frame is installed side by side, the separator below is equipped with the pre-heater, the top of evaporimeter sets up side by side the compressor, the evaporimeter is kept away from the below of one side of separator is connected with the condensate tank, the bottom of sled dress frame is provided with a plurality of pump side by side.

In any of the above schemes, preferably, the evaporator is a plate type or shell-and-tube structure, a steam inlet of the evaporator is provided with a steam baffle, and an outlet pipeline of the compressor extends into the bottom of the water collecting tank.

(III) advantageous effects

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

(1) the technical principle of mechanical recompression is adopted to carry out evaporation and concentration circulation, the waste heat in the system is fully utilized, and the circulation realizes a miniaturized, instrumented and skid-mounted structure;

(2) the screw type steam compressor is used as a basis, the characteristics of small volume, low noise, wide frequency conversion adjusting range and the like of the single screw compressor are fully exerted, the miniaturization and the instrumentization of the MVR evaporation concentrator device are realized, the energy-saving effect is obvious, the scaling of the evaporator can be effectively avoided, the scaling risk of the evaporator is greatly reduced, the technical problems of frequent cleaning of the equipment, high cleaning cost, serious attenuation of the equipment performance and the like are avoided, and the full-automatic operation is realized;

(3) by utilizing the high-efficiency energy-saving environment-friendly evaporation technology, the energy consumption is saved, the standard coal discharge amount is reduced, and the dual significance of energy saving and environment protection is realized;

(4) the full-automatic control logic is developed, and the automatic control logic has control methods of automatic feeding, automatic discharging, automatic evaporation condensate discharging, automatic water replenishing, automatic heat replenishing, automatic air exhausting and the like, so that the automatic operation of the device is realized, and the manual operation and the intervention are greatly reduced.

The skid-mounted MVR evaporation device provided by the invention is further explained by combining the following drawings.

Drawings

FIG. 1 is a schematic structural diagram of a skid-mounted MVR evaporation apparatus according to the present invention;

FIG. 2 is a schematic diagram of the skid-mounted MVR evaporation apparatus of the present invention;

FIG. 3 is a schematic structural diagram illustrating an installation state of the skid-mounted MVR evaporation apparatus according to the present invention;

FIG. 4 is a schematic structural diagram of an electromagnetic scale inhibition and scale removal device of the skid-mounted MVR evaporation device of the present invention;

FIG. 5 is a schematic structural diagram of an induction power supply of the electromagnetic scale inhibition and removal device of the skid-mounted MVR evaporation device according to the present invention;

FIG. 6 is a structural diagram of an electromagnetic induction coil of the skid-mounted MVR evaporation apparatus according to the present invention, wherein the electromagnetic induction coil has the same state of turn moment;

FIG. 7 is a schematic structural diagram of different states of the turn moment of the electromagnetic induction coil of the skid-mounted MVR evaporation apparatus according to the present invention;

in the figure, 1-feedstock tank; 2-a raw material tank liquid level sensor; 3-vacuum regulating valve; 4-a vacuum pump; 5-a feed pump; 6-a feed filter; 7-cooling water preheater; 8-a condensate preheater; 9-feed regulating valve; 10-condensation regulating valve; 11-a condensate pump; 12-condensation tank level sensor; 13-a condensation tank; 14-water supply pump; 15-a steam generator; 16-a water supply filter; 17-a water supply flow sensor; 18-a heat-compensating regulating valve; 19-supply pressure sensor; 20-oil supply filter; 21-an oil supply pump; 22-a fuel tank; 23-cooling regulating valve; 24-oil supply regulating valve; 25-tank temperature sensor; 26-tank level sensor; 27-a compressor; 28-a steam filter; 29-an evaporator; 30-a separator; 31-separator temperature sensor; 32-separator pressure sensor; 33-a separator density sensor; 34-separator level sensor; 35-a discharge pump; 36-discharge regulating valve; 37-cooling water pressure sensor; 38-cooling water filter; 39-a cooling pump; 40-water tank temperature sensor; 41-water tank level sensor; 42-a water tank; 43-water replenishing cut-off valve; 44-cooling shut-off valve; 45-a drainage shut-off valve; 46-an electromagnetic scale inhibition and removal device; 47-forced circulation pump; 48-feed supplement cut-off valve; 49-a water collecting tank; 50-a control cabinet; 51. skid-mounting the frame;

4601. a flux concentrating core; 4602. a fluid delivery conduit; 4603. a pipeline heat-insulating layer; 4604. an electromagnetic induction coil; 4605. sealing the heat preservation cover; 4606. an electrically operated valve; 4607. a cooling water pump; 4608. a cooling circulation water tank; 4609. a sewage draining pipeline; 4610. a heat exchange coil; 4611. a control cabinet; 4612. a first pressure sensor; 4613. a first temperature sensor; 4614. a first flow sensor; 4615. a first liquid level sensor; 4616. an inductive power supply; 4617. a second temperature sensor; 4618. a transformer; 4619. an inverter; 4620. a filter; 4621. a rectifier.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 to 7, this embodiment provides a skid-mounted MVR evaporation apparatus, which includes a raw material supply system, an evaporation circulation system, a vacuum system, and a waste heat recovery system, where the raw material supply system includes a raw material tank 1 and a preheater, the evaporation circulation system includes an evaporator 29, a separator 30, a steam generator 15, a steam filter 28, and a compressor 27, the vacuum system includes a vacuum pump 4, the waste heat recovery system includes a water tank 42, a material in the raw material tank 1 enters the preheater for preheating, the material enters the evaporator 29 after being preheated, the evaporator 29 is connected to the steam generator 15, the steam generator 15 provides a heat source for the evaporator 29, the material absorbs heat in the evaporator 29 and enters the separator 30, the material is concentrated in the separator 30 to a set concentration and then discharged, the material which does not reach the set concentration in the separator 30 flows back into the evaporator 29, the steam in the separator 30 enters the steam filter 28 for filtering and then enters the compressor 27, the compressor 27 heats and pressurizes the steam, and then the steam flows back to the evaporator 29 to provide a heat source for the materials in the evaporator 29, the heat source pipeline of the evaporator 29 is connected with the vacuum pump 4, the vacuum pump 4 pumps the vacuum tail gas in the heat source pipeline, and the vacuum tail gas pumped by the vacuum pump 4 enters the raw material tank 1 to exchange heat and then flows into the water tank 42.

The material in the raw material tank 1 is fed by a feed pump 5, the material flowing out of the feed pump 5 enters a preheater after passing through a feed filter 6, the material preheated by the preheater enters an evaporator 29 after passing through a feed adjusting valve 9 and is heated to generate a vapor-liquid two-phase flow, the vapor-liquid two-phase flow enters a separator 30 through an outlet of the evaporator 29, vapor-liquid separation is formed in the separator 30, the separated liquid is conveyed to return to an inlet at the bottom of the evaporator 29 through a forced circulation pump 47 at the lower part of the separator 30, the low-pressure secondary steam separated by the separator 30 enters a vapor filter 28 through an outlet of the separator 30, impurities in the secondary steam are filtered, then enter a compressor 27, are heated and pressurized by the compressor 27 and then enter a water collecting tank 49, the water collecting tank 49 has a separation function, and after small liquid drops in the steam are separated, the steam returns to the heat source side of the evaporator, the heat exchange process of the material is completed, and the small liquid drops are gathered to form high-temperature condensate which flows into the condensing tank 13 and is reserved for waste heat recycling.

The sled dress formula MVR evaporation plant of this embodiment, adopt raw materials supply system, evaporation circulation system, vacuum system, waste heat recovery system complex mode, when accomplishing evaporation concentration, adopt waste heat recovery system to carry out make full use of to the waste heat, waste heat recovery system is raw materials supply system, evaporation circulation system and vacuum system provide the heat, guarantee thermal full cyclic utilization, and simultaneously, for the heat cycle of guaranteeing evaporation system, adopt vacuum system to take out the vacuum tail gas in the heat cycle of evaporimeter, guarantee the heat exchange efficiency of evaporimeter, prevent that heat transfer performance from worsening, guarantee the steady operation of MVR system.

Further, the compressor is a core component of the MVR system, and in order to enable the MVR system to form a miniaturized, skid-mounted, and modular integrated structure, the compressor 27 of the evaporation cycle system needs to be miniaturized and improved, so that the compressor 27 is a screw-type vapor compressor, and the screw-type vapor compressor has the characteristics of small volume and high efficiency; the optimized single-screw type steam compressor has the advantages of strong pressure bearing capacity, strong heat resistance and good sealing performance.

The compressor 27 includes a self-lubricating water supply system for supplying water for lubricating components such as a star, a rotor, and a cavity of the compressor 27, and an oil supply system for supplying lubricating oil to oil-lubricated components inside the compressor 27.

Specifically, the self-lubricating water supply system comprises a condensation tank 13, a water supply pump 14 and a water supply filter 16, self-lubricating condensed water in the compressor 27 and steam which is pressurized and heated in the compressor 27 flow into a water collection tank 49, the steam and the condensed water are separated in the water collection tank 49, the steam enters an evaporator 29 to serve as a heat source, the condensed water enters the condensation tank 13, condensate in the condensation tank 13 further comprises steam condensate generated by the evaporator 29, and a part of the condensed water in the condensation tank 13 returns to the compressor 27 after impurities are removed through the water supply pump 14 and the water supply filter 16 to serve as the self-lubricating condensed water.

Specifically, the water supply filter 16 is a Y-type filter, and the model and specification are 1 to 2 steps larger than the corresponding pipeline; in order to prevent the vaporization phenomenon of the high-temperature evaporation and condensation of the condensation tank 13 after passing through the water supply pump 14, the lift of the water supply pump 14 is more than 30 m; a condensing tank liquid level sensor 12 is arranged on the condensing tank 13, and the liquid level of the condensing tank 13 is monitored and controlled in real time according to the collected liquid level data; a water supply flow sensor 17 is arranged at the outlet of the water supply filter 16, and the water supply flow is monitored and controlled in real time according to the acquired flow data; the outer wall surface of the condensing tank 13 is coated with heat preservation cotton, and the thickness of the heat preservation cotton is 50-100 mm.

The oil supply system comprises an oil tank 22, an oil supply pump 21, an oil supply filter 20 and an oil supply adjusting valve 24, wherein the oil tank 22 supplies lubricating oil to the compressor 27, the lubricating oil is pumped out by the oil supply pump 21, impurities are removed by the oil supply filter 20, then the lubricating oil flows into the compressor 27, passes through a machine seal and a bearing in the compressor 27, and then returns to the oil tank 22 through an oil path outlet of the compressor 27.

Specifically, the oil supply filter 20 is a Y-type filter, and the model and specification are 1 to 2 steps larger than the corresponding pipeline; the outlet pressure of the feed pump 14 should be between 4 and 10 bar; the lubricating oil in the oil tank 22 is 32 # or 46 # turbine oil, and the oil temperature is controlled below 80 ℃; the oil tank 22 is provided with a temperature sensor 25 which monitors and controls the oil temperature in real time according to the collected temperature data; for example, a tank level sensor 26 is arranged on the oil tank 22, and the liquid level of the oil tank 22 is monitored and controlled in real time according to the collected liquid level data; an oil supply pressure sensor 19 is arranged at the outlet of the oil supply pump 21, the oil supply pressure sensor 19 is arranged behind the oil supply filter 20, and the oil supply pressure is monitored and controlled in real time according to the acquired pressure data; a heat exchange coil is arranged in the oil tank 22, the diameter of the heat exchange coil is 19-38mm, cooling water flows through the coil to cool the oil temperature in the oil tank 22, and the waste heat of the lubricating oil is recovered.

The screw type steam compressor obtains innovative achievements in the aspect of MVR technical application, the screw type steam compressor is a small-sized steam compressor, and the skid-mounted type, modularization, miniaturization and instrumentization of the MVR evaporation concentrator device can be realized by adopting a single screw type compressor applied to steam compression.

Further, the raw material supply system comprises a raw material tank 1, a feeding pump 5, a feeding filter 6, a preheater and a feeding regulating valve 9; the feed pump 5 pumps the feed liquid in the raw material tank 1, wherein the preheater comprises a cooling water preheater 7 and a condensate preheater 8, the feed liquid enters the cooling water preheater 7 through a feed filter 6, the condensate preheater 8 after the waste heat of the cooling water is recovered, the condensate waste heat is recovered, and the condensate waste heat finally enters an evaporator 29 through a feed regulating valve 9; the cooling water preheater 7 is arranged at a feed inlet of the evaporator 29, and the feed liquid of the evaporator 29 is used as a cold medium to recover the waste heat of the cooling water; the condensate preheater 8 is arranged at the feeding inlet of the evaporator 29, and the feeding liquid of the evaporator 29 is used as a cooling medium to recover the residual heat of the condensate.

The feeding filter 6 can adopt a bag filter to remove solid particle impurities in the feed liquid; the cooling water preheater 7 can be plate-type or shell-and-tube type and can be made of stainless steel or titanium alloy; the condensate preheater 8 can be plate-type or shell-and-tube type and can be made of stainless steel or titanium alloy; a raw material tank liquid level sensor 2 is arranged on the raw material tank 1, and the liquid level of the raw material tank 1 is monitored in real time according to the acquired liquid level data; on the inlet pipe way of evaporator 29 import department, divide a road and flow back to head tank 1, guarantee that cooling water preheater 7 and condensate preheater 8 are full of the feed liquid in real time, in time retrieve cooling water and condensate waste heat.

The preheater includes cooling water preheater 7 and condensate preheater 8, and the material in head tank 1 gets into cooling water preheater 7 and condensate preheater 8 in proper order, flows into evaporimeter 29 after preheating.

Furthermore, the waste heat recovery system absorbs the waste heat of the system, a cooling water heat exchange coil is arranged in a water tank 42 of the waste heat recovery system, and cooling water in the cooling water heat exchange coil exchanges heat in the water tank 42; the cooling water in the cooling water heat exchanging coil absorbs heat in the water tank 42 to cool the cooling water in the water tank 42.

A cooling water system is formed by the water tank 42, the cooling pump 39, the cooling water filter 38, a heat absorption coil in the oil tank and the like; the cooling water in the water tank 42 is pumped out by the cooling pump 39, impurities are removed by the cooling water filter 38, and the cooling water enters the heat absorption coil in the oil tank 22 to absorb the waste heat of the lubricating oil in the oil tank 22, then enters the cooling water preheater 7 to transfer heat to the feed liquid, and then returns to the water tank 42.

Specifically, the cooling water filter 38 is a Y-type filter, and the model and specification are 1 to 2 steps larger than the corresponding pipeline; the water tank 42 is provided with a cooling water heat exchange coil, the diameter of the cooling water heat exchange coil is 19-38mm, external cooling water is introduced into the cooling water heat exchange coil, and the water temperature of the water tank is regulated and controlled; for example, a water tank temperature sensor 40 is arranged on the water tank 42, and the water tank temperature is monitored and controlled in real time according to the acquired temperature data; a water tank liquid level sensor 41 is arranged on the water tank 42, and the liquid level of the water tank 42 is monitored and controlled in real time according to the acquired liquid level data; and a cooling water pressure sensor 37 is arranged on an outlet pipeline of the cooling water filter 38, and the cooling water pressure is monitored and controlled in real time according to the acquired pressure data.

The raw material tank 1 is provided with a raw material tank coil pipe, and vacuum tail gas sucked by the vacuum pump 4 enters the raw material tank coil pipe for heat exchange and then flows into the water tank 42; the diameter of a raw material tank coil pipe in the raw material tank 1 is 19-38mm, feed liquid is arranged outside the raw material tank coil pipe, vacuum tail gas is arranged in the raw material tank coil pipe, and steam waste heat of the vacuum tail gas is recovered.

A heat absorption coil is arranged in the oil tank 22, cooling water in the water tank 42 flows into the heat absorption coil, heat exchange is carried out between the cooling water in the heat absorption coil and oil liquid in the oil tank 22, the cooling water in the water tank 42 flows into the cooling water preheater 7 as a heat source after absorbing heat, materials in the cooling water preheater 7 are preheated for the first time, the cooling water flows back to the water tank 42 after exchanging heat in the cooling water preheater 7, and the materials flow into the condensate preheater 8; condensed water in the condensing tank 13 flows into the condensate preheater 8 through the condensing pump 11 to be used as a heat source to carry out secondary preheating on materials in the condensate preheater 8, and the condensed water after heat exchange is discharged out of the system, so that the heat is recycled.

A plurality of connecting interfaces of the vacuum pump 4 and the evaporator 29 are distributed on the evaporator 29 at intervals, preferably, 2-3 vacuum ports are uniformly distributed in the up-middle-down direction of the evaporator 29 at intervals; the vacuum pump 4 is connected with a vacuum regulating valve 3, and the vacuum regulating valve 3 is used for on-off or opening degree regulation so as to supplement air to the pipeline, prevent the vacuum pump 4 from exhausting insufficient and ensure the stable operation of the vacuum pump 4; the vacuum pump 4 is also connected with a water tank water supply pipeline, and the water tank 42 provides working fluid for the vacuum pump 4 to ensure the stable operation of the vacuum pump 4.

The traditional domestic equipment has lower development level in the field of intelligent technology and can only complete a simple control target combining automatic control and manual regulation. The product of this embodiment not only improves the core design and the manufacturing capacity of homemade equipment comprehensively, realizes the localization and the macro-scale of steam equipment. The technical development trend is along with the rapid development of the wastewater (liquid) treatment industry, the requirements on the treatment capacity and the quality of the treated water are further improved, and the device is intelligentized, efficient and energy-saving while equipment is developed towards miniaturization.

In this embodiment, the control system is further included, and the control system is disposed in the control cabinet 50.

The separator 30 is connected with a separator temperature sensor 31, a separator pressure sensor 32, a separator flow sensor, a separator liquid level sensor 34, a separator density sensor 33, a feeding regulating valve 9, a discharging regulating valve 36, a heat supplementing regulating valve 18 and a vacuum regulating valve 3;

the separator temperature sensor 31, the separator pressure sensor 32, the water supply flow sensor 17, the oil supply pressure sensor 19, the oil tank liquid level sensor 26 and the oil tank temperature sensor 25 are connected with a control system to realize data acquisition and monitoring, when monitoring data exceed a set requirement, an alarm is given, and when the monitoring data further deviate from a set value, the operation of the compressor 27 is stopped to protect the compressor 27.

The separator liquid level sensor 34 and the feeding regulating valve 9 are both connected to the control system, so that liquid level data acquisition monitoring and liquid level regulation are realized, when the liquid level data acquisition of the separator 30 is higher than a set value, the control system calculates and sends out an instruction, the opening degree of the feeding regulating valve 9 is reduced, when the liquid level data acquisition of the separator 30 is lower than the set value, the control system calculates and sends out an instruction, the opening degree of the feeding regulating valve 9 is increased, and the liquid level of the separator 30 is guaranteed to be maintained at a set level.

The density sensor 33 of the separator, the discharge pump 35 and the discharge regulating valve 36 are all connected to the control system, density data acquisition monitoring and discharge concentration regulation are achieved, when the density data acquisition of the separator 30 is higher than a set value, the control system calculates and sends out an instruction, the opening degree of the discharge regulating valve 36 is increased, when the density data acquisition of the separator 30 is lower than the set value, the control system calculates and sends out an instruction, the opening degree of the discharge regulating valve 36 is reduced, and the discharge concentration of the separator 30 is guaranteed to be maintained at a set level.

The separator temperature sensor 31 and the heat-supplementing regulating valve 18 are both connected to the control system to realize temperature data acquisition monitoring and evaporation temperature regulation, when the temperature data acquisition of the separator 30 is higher than a set value, the control system calculates and sends out an instruction to reduce the opening degree of the heat-supplementing regulating valve 18, and when the temperature data acquisition of the separator 30 is lower than the set value, the control system calculates and sends out an instruction to increase the opening degree of the heat-supplementing regulating valve 18 to ensure that the evaporation temperature of the separator 30 is maintained at a set level;

the separator pressure sensor 32 and the vacuum regulating valve 3 are connected with the control system to realize pressure data acquisition monitoring and evaporation pressure regulation, when the pressure data acquisition of the separator 30 is higher than a set value, the control system calculates and sends out an instruction to reduce the opening degree of the vacuum regulating valve 3, and when the pressure data acquisition of the separator 30 is lower than the set value, the control system calculates and sends out an instruction to increase the opening degree of the vacuum regulating valve 3 to ensure that the evaporation pressure of the separator 30 is maintained at a set level.

The condensing tank 13 is connected with a condensing tank liquid level sensor 12 and a condensation regulating valve 10, and the condensing tank liquid level sensor 12 and the condensation regulating valve 10 are both connected to a control system; the liquid level data acquisition monitoring and the liquid level adjustment are realized, when the liquid level data acquisition of the condensing tank 13 is higher than a set value, the control system calculates and sends out an instruction to increase the opening degree of the condensing regulating valve 10, and when the liquid level data acquisition of the condensing tank 13 is lower than the set value, the control system calculates and sends out an instruction to reduce the opening degree of the condensing regulating valve 10 to ensure that the liquid level of the condensing tank 13 is maintained at a set level.

The raw material tank 1 is connected with a raw material tank liquid level sensor 2 and a feed supplement cut-off valve 48, and the raw material tank liquid level sensor 2 and the feed supplement cut-off valve 48 are connected to a control system; realize liquid level data acquisition monitoring and liquid level control, when 1 liquid level data acquisition of head tank is higher than and sets for the upper limit value, calculate and send the instruction by control system, close feed supplement trip valve 48, when 1 liquid level data acquisition of head tank is less than and sets for the lower limit value, calculate and send the instruction by control system, open feed supplement trip valve 48, guarantee 1 liquid level of head tank is maintained at and is set for the level.

The water tank 42 is connected with a cooling water pressure sensor 37 and a cooling regulating valve 23, and the cooling water pressure sensor 37 and the cooling regulating valve 23 are connected to a control system; the pressure data acquisition monitoring and the pressure regulation are realized, when the cooling water pressure data acquisition is higher than a set value, the control system calculates and sends out an instruction to reduce the opening degree of the cooling regulating valve 23, and when the cooling water pressure data acquisition is lower than the set value, the control system calculates and sends out an instruction to increase the opening degree of the cooling regulating valve 23 to ensure that the cooling water pressure is maintained at a set level.

The oil tank 22 is connected with an oil supply pressure sensor 19 and an oil supply regulating valve 24, and the oil supply pressure sensor 19 and the oil supply regulating valve 24 are connected to a control system; the pressure data acquisition monitoring and the pressure regulation are realized, when the oil supply pressure data acquisition is higher than a set value, the control system calculates and sends out an instruction to reduce the opening degree of the oil supply regulating valve 24, and when the oil supply pressure data acquisition is lower than the set value, the control system calculates and sends out an instruction to increase the opening degree of the oil supply regulating valve to ensure that the oil supply pressure is maintained at a set level.

The water tank 42 is connected with a water tank temperature sensor 40, a water tank liquid level sensor 41, a cooling cut-off valve 44, a water supplementing cut-off valve 43 and a water discharging cut-off valve 45, and the water tank temperature sensor 40 and the cooling cut-off valve 44 are connected to a control system; temperature data acquisition monitoring and temperature regulation are realized, when the temperature data acquisition of the water and oil tank 42 is higher than a set high limit value, the control system calculates and sends out an instruction, the cooling cut-off valve 44 is closed, and when the temperature data acquisition of the water and oil tank 42 is lower than a set low limit value, the control system calculates and sends out an instruction, the cooling cut-off valve 44 is opened, and the temperature of the water tank 42 is guaranteed to be maintained at a set level.

The water tank liquid level sensor 41, the water replenishing cut-off valve 43 and the water discharging cut-off valve 45 are connected to a control system to realize liquid level data acquisition monitoring and liquid level adjustment, when the liquid level data acquisition of the water tank 42 is higher than a set upper limit value, the control system calculates and sends an instruction to open the water discharging cut-off valve 45 and close the water replenishing cut-off valve 43; when the liquid level data acquisition of the water tank 42 is lower than a set upper limit value and higher than a set lower limit value, the control system calculates and sends an instruction, the drainage cut-off valve 45 is closed, and the water replenishing cut-off valve 43 is closed; when the liquid level data acquisition of the water tank 42 is lower than the set lower limit value, the control system calculates and sends an instruction, the drainage cut-off valve 45 is closed, and the water replenishing cut-off valve 43 is opened.

Furthermore, the control system can utilize a PID control technology and adopts PLC control to carry out real-time monitoring and intelligent control on the process parameters of each part of the device in operation, so that the control of the device is more flexible, the working processes of all the parts are mutually cooperated, and the reliability of the device is improved.

In this embodiment, still include skid-mounted frame 51, evaporimeter 29 and separator 30 are at the horizontal direction of skid-mounted frame 51 and are installed side by side, and steam filter 28 is connected at the top of evaporimeter 29, and separator 30 and head tank 1 are at the longitudinal direction of skid-mounted frame 51 and are installed side by side, and the separator 30 below is equipped with the pre-heater, and the top of evaporimeter 29 sets up compressor 27 side by side, and the below of the one side that keeps away from separator 30 of evaporimeter 29 is connected with condensate tank 13, and the bottom of skid-mounted frame 51 is provided with a plurality of pump side by side.

Specifically, the evaporator 29 adopts a plate type or shell-and-tube structure, and the evaporator 29 can be arranged in a vertical or horizontal manner; the evaporator 29 and the separator 30 can be made of stainless steel or titanium alloy materials, and a steam baffle is arranged at a steam inlet of the evaporator 29 to prevent high-speed steam from washing; the evaporator 29 and the separator 30 need to be wrapped with heat insulation cotton at the outer side, and the thickness of the heat insulation cotton is 50-100 mm; the inlet opening of the evaporator 29 is arranged in the inlet pipe of the forced circulation pump 47 or in the bottom cone of the separator 30; the steam filter 28 adopts a wire mesh type, the wire mesh is in a solid disc or annular shape and is made of stainless steel or titanium alloy, and the thickness of the wire mesh is 50-150 mm; the water collecting tank 49 is a round cylinder body, an insulating layer is arranged outside, the thickness of the insulating layer is 50-100mm, and an outlet pipeline of the compressor 27 extends into the bottom of the water collecting tank 49; an electromagnetic scale inhibition and removal device 46 is arranged on a return pipeline between the evaporator 29 and the separator 30, and the electromagnetic scale inhibition and removal device 46 is arranged on an outlet pipeline of a forced circulation pump 47.

Furthermore, a return pipeline is arranged between the separator 30 and the evaporator 29, and the electromagnetic scale-inhibiting and descaling device 46 is connected to the return pipeline. The return line is connected with a forced circulation pump 47, materials in the preheater enter an evaporation system at the inlet of the forced circulation pump 47, and the materials are sucked into the line by means of the negative pressure of the forced circulation pump 47, so that the flowing of the materials is promoted.

Specifically, the electromagnetic scale inhibition and scale removal device 46 comprises an electromagnetic transmitting component and a magnetic field receiving component, the electromagnetic transmitting component comprises an induction power supply 4616 and an electromagnetic induction coil 4604, the induction power supply 4616 supplies alternating current to the electromagnetic induction coil 4604, the electromagnetic induction coil 4604 is wound on the magnetic field receiving component, and the electromagnetic induction coil 4604 generates an alternating magnetic field with the magnetic field strength of 5000-.

The electromagnetic emission assembly and the magnetic field receiving assembly cooperate to magnetize fluid in the fluid transport conduit 4602, so that the fluid in the fluid transport conduit 4602 becomes a magnetized fluid with magnetism. The induction power supply 4616 is a power supply conversion or generation device which converts the common power frequency 50Hz alternating current into thousands or even tens of thousands Hz, the electromagnetic induction coil 4604 converts the medium/high frequency strong current into a strong magnetic field, the magnetic field strength is about 5000-50000 gauss, the magnetic field strength is improved, so that the magnetization effect of the fluid is enhanced, the fluid flow is facilitated, and the problem of scaling caused by the accumulation of impurities in the fluid on the wall surface of the pipeline is further reduced.

The frequency of the inductive power supply 4616 is adjustable according to actual requirements, and the frequency range is determined according to the actual magnetic field distribution effect.

Preferably, the inductive power supply 4616 is a medium/high frequency power supply to the electromagnetic coil 4604 at a frequency of 2000Hz to 20000Hz to generate a magnetic field strength that meets the requirements of the device.

The mode that the electromagnetic induction coil 4604 is wound outside the pipe of the fluid conveying pipeline 4602 is adopted, the electromagnetic induction principle is used, a strong alternating magnetic field is generated, a material medium flowing through the fluid conveying pipeline 4602 is magnetized, and then the magnetized fluid is brought into the pipeline, so that the cleaning of a scale layer or the scale inhibition effect is realized, the medium in the pipeline can be acted in real time, the power consumption is low, the scale removal and scale inhibition efficiency is high, the heat transfer performance of the pipeline is effectively improved, no harmful gas is generated, and the environment is protected.

After the common fluid is acted by a magnetic field, the originally connected 'molecular group' is broken through, so that the common fluid is changed into single water molecule with vitality, the permeability and the dissolving capacity of the magnetized fluid are strong, the permeability and the dissolving capacity of the magnetized fluid are obviously improved compared with that of natural water, and the scale layer attached in the pipeline can be effectively removed.

This embodiment not only is applicable to the normal running water, still is applicable to high concentration waste water, prevents in the fluid impurity scale deposit in the pipeline, guarantees the unobstructed of pipeline.

When the magnetic force line is vertical to the flow velocity of the fluid, the fluid molecules are magnetized and modified, and the common fluid molecules are magnetized and connected into huge magnetized molecular groups, so that the flow of the fluid in the pipeline is promoted, and the scaling problem is solved.

The magnetic field receiving assembly comprises a magnetism gathering tube core 4601, the magnetism gathering tube core 4601 is arranged in the fluid conveying pipeline 4602, has a magnetic attraction effect, guides the magnetic field distribution in the fluid conveying pipeline 4602 to move towards the center of the pipeline, reduces the divergence and loss of the magnetic field, so that the fluid in the fluid conveying pipeline 4602 is uniformly magnetized, and the magnetization effect on the fluid medium flowing through the pipeline is realized.

The magnetic field receiving assembly further comprises a core support frame for fixing the flux concentrator core 4601 and the fluid transport conduit 4602, the core support frame being respectively connected to an outer surface of the flux concentrator core 4601 and an inner surface of the fluid transport conduit 4602. The tube core support frame, the magnetic gathering tube core 4601 and the fluid conveying pipeline 4602 can be fixedly connected or detachably connected, such as clamping, threaded connection or welding, the detachable connection mode is convenient to detach and replace, the overhaul and maintenance are convenient, and the stability of the fixed connection structure is strong. The core support frame may be a structure in which a triangular support is connected to an internal and external screw joint, and both ends of the flux cored core 4601 are fixed to the inner wall of the fluid transport pipe 4602.

The flux focusing core 4601 is a solid cylinder, and the flux focusing core 4601 is coaxial with the fluid transportation pipeline 4602, i.e. the flux focusing core 4601 is installed in the center of the fluid transportation pipeline 4602, and plays a role in attracting and uniformly distributing a magnetic field. The material of the flux concentrator core 4601 may be a solid stainless steel material with corrosion resistance and high temperature resistance, or may be other materials with good conductivity and corrosion resistance. In the fluid transport tube 4602, the magnetic gathering tube core 4601 is made of a cylindrical material so as to homogenize a magnetic field, and a solid material has a good absorption effect on the magnetic field.

A preset gap is left between the fluid transport pipe 4602 and the electromagnetic induction coil 4604, so that short circuit caused by contact between the fluid transport pipe 4602 and the electromagnetic induction coil 4 is prevented, and matching of an electromagnetic induction system is realized.

The fluid conveying pipeline 4602 is provided with a pipeline insulating layer 4603, and the pipeline insulating layer 4603 is clamped between the electromagnetic induction coil 4604 and the fluid conveying pipeline 4602, so that the pipeline insulating layer 4604 has an insulating effect and also has an effect of insulating and protecting the electromagnetic induction coil 4604 by an isolating pad. The material of the insulating layer 4603 can be selected from fireproof and heat-resistant materials, such as insulating cotton.

Specifically, the pipe insulating layer 4603 is disposed at a preset gap position between the fluid conveying pipe 4602 and the electromagnetic induction coil 4604, and the preset gap may be 2mm to 5mm, so as to avoid heat dissipation of the fluid conveying pipe 2.

The fluid transport tubes 4602 are made of a high temperature and corrosion resistant electrically non-conductive material, which may be quartz glass or other materials having equivalent properties. The electromagnetic induction coil 4604 is spirally wound on the pipe insulation layer 4603 of the fluid transportation pipe 4602, and the diameter of the electromagnetic induction coil 4604 is manufactured according to the actual requirements of the fluid transportation pipe 4602.

The fluid transport conduit 4602 can be butted with a pipeline on equipment, the device of the embodiment is connected to the pipeline, and the butting mode can be various structural forms such as threaded connection and flange connection.

The electromagnetic induction coil 4604 is a hollow spiral tube, and the electromagnetic induction coil 4604 of the hollow spiral tube is wound on the magnetic field receiving assembly to make the magnetic field distribution uniform. Referring to fig. 6 and 7, the electromagnetic induction coil 4604 may be made of red copper, the turn moment and the turn moment distribution of the electromagnetic induction coil 4604 are manufactured under actual conditions, the turn moment of the electromagnetic induction coil 4604 is set to be equal or gradually increased from the inlet end to the outlet end, that is, the turn moment distribution may be sparse, the turn moment distribution may be dense, or the turn moment distribution may be varied from dense to sparse, the hollow spiral tube with equal turn moment is convenient to process, and the processing cost is low. When the variable-turn moment is distributed, the turn moment is preferably gradually increased along the current inlet end to the current outlet end, so that the heat accumulation at the outlet end is reduced, and the magnetic field distribution and the heat transfer characteristics are met.

The electromagnetic induction coil 4604 may be an air coil having a circular or rectangular cross section.

In this embodiment, a cooling circulation system is further provided, the electromagnetic induction coil 4604 is of a hollow structure, the electromagnetic induction coil 4604 is communicated with the cooling circulation system, a cooling fluid in the cooling circulation system is introduced into the hollow electromagnetic induction coil 4604, the cooling fluid exchanges heat with the electromagnetic induction coil 4604, the cooling fluid absorbs heat of the electromagnetic induction coil 4604, the cooling fluid flows in the cooling circulation system, the heat in the cooling fluid is recycled, the cooling circulation system plays a role in cooling the electromagnetic induction coil 4604, overheating loss is prevented, the electromagnetic induction coil 4604 is protected, the heat is recycled, energy utilization rate is improved, and resources are saved.

The cooling circulation system comprises a cooling circulation water tank 4608, a cooling water outlet of the cooling circulation water tank 4608 is connected with a cooling water inlet of an induction power supply 4616, a cooling water outlet of the induction power supply 4616 is connected with a cooling water inlet of the cooling circulation water tank 4608, and cooling water flows through the induction power supply 4616 and the electromagnetic induction coil 4604 and flows back to the cooling circulation water tank 4608 to cool the induction power supply 4616 and the electromagnetic induction coil 4604.

Specifically, a cooling pipe is arranged inside the induction power supply 4616, and the electromagnetic induction coil 4604 is an air-core coil; a cooling water outlet of the cooling circulation water tank 4608 is connected to a water inlet of a cooling pipe of the induction power supply 4616, cooling water flows to a cooling pipe outlet of the induction power supply 4616 through the cooling pipe of the induction power supply 4616 and the electromagnetic induction coil 4604, and the cooling pipe outlet of the induction power supply 4616 is connected to a cooling water inlet of the cooling circulation water tank 4608.

A heat exchange coil 4610 is arranged in the cooling circulation water tank 4608, the heat exchange coil 4610 is a heat exchange metal coil wound in the cooling circulation water tank 4608, and a cold material is introduced into the inside of the heat exchange metal coil, so that heat of the cooling circulation water tank 4608 is recovered, and heat of cooling water can be continuously recycled. Specifically, the heat exchange coil 4610 may be made of stainless steel, with the specification of the tube heat coil being determined by the size of the particular device.

The cooling circulation system is also provided with a cooling water pump 4607, and the cooling water pump 4607 is arranged between a cooling water outlet of the cooling circulation water tank 4608 and a cooling water inlet of the induction power supply 4616 and is used for regulating and controlling the flowing state of the cooling water.

An electric valve 4606 is further arranged in the cooling circulation system, the opening of the electric valve 4606 can be adjusted, the electric valve 4606 is connected to a control cabinet 4611, and the control cabinet 4611 can remotely adjust the electric valve 4606 as required. The control cabinet 4611 may also be integrated with the control cabinet 50 for centralized control.

Specifically, the cooling circulation water tank 4608 may be separately installed and communicated with a cooling pipe of the induction power supply 4616 through a connection pipe, the cooling circulation water tank 4608 may be installed at the lowermost layer, the cooling circulation water tank 4608 may be formed by processing common carbon steel Q235-a, and the inner surface is plated with stainless steel 0Cr18Ni 9; the cooling conduit on the inductive power supply 4616 may then be helically wound around the outer wall of the component within which cooling is desired. For example, the cooling pipe may be an insulating plastic pipe, and the water outlet of the cooling circulation water tank 4608 and the water inlet of the cooling pipe inside the induction power supply 4616 may be connected by a PVC steel wire pipe. A drain line 4609 is connected to the cooling circulation water tank 4608.

The cooling circulation water tank 4608 and the water tank 42 can be integrated into an integrated structure, the electromagnetic induction coil 4604 is communicated with the water tank 42, and cooling water releases heat in the water tank 42 and then flows back to the electromagnetic induction coil 4604, so that the heat can be recycled.

The preheater is communicated with the return pipeline, materials in the preheater flow into the evaporator 29 through the electromagnetic scale inhibition and removal device 46 on the return pipeline, and the materials entering the evaporator 29 from the preheater are magnetized through the electromagnetic scale inhibition and removal device 46, so that the flowability of the materials is improved, and the problem of scale formation of the materials in the system is solved.

Further, a sealing heat-preservation cover 4605 is sleeved on the magnetic field receiving assembly, the electromagnetic induction coil 4604 is arranged between the magnetic field receiving assembly and the sealing heat-preservation cover 4605, the sealing heat-preservation cover 4605 performs sealing protection on the electromagnetic induction coil 4604, heat loss of the electromagnetic induction coil 4604 and the fluid conveying pipeline 4602 is reduced, the heat is fully utilized, meanwhile, an isolation effect is also achieved on the magnetic field, and dissipation loss of the magnetic field is reduced.

Preferably, a vacuum state is formed between the sealed heat-preserving cover 4605 and the magnetic field receiving assembly, the heat transfer coefficient in the vacuum state is low, heat loss is further reduced, and meanwhile, the vacuum state can effectively protect the electromagnetic induction coil 4604 and the magnetic field receiving assembly and reduce interference of external conditions on the electromagnetic induction coil 4604.

Specifically, the sealed heat-insulating cover 4605 is connected with a vacuum pumping device, and the vacuum pumping device can be a vacuum pump, so that the operation is convenient and the cost is low. The sealing protective cover is made of metal material and is polished, so that the dual purposes of shielding a magnetic field and preserving heat are achieved.

The sealed heat preservation cover 4605 is a stainless steel cylinder with polished inside, the electromagnetic induction coil 4604 is isolated in a closed space, small holes are formed in the surface of the sealed heat preservation cover 4605 and connected with an external vacuum pump, so that the internal air is pumped out, and the sealed heat preservation cover 4605 has the dual purposes of shielding a magnetic field and preserving heat.

Furthermore, this embodiment further includes a first pressure sensor 4612, a first temperature sensor 4613 and a first flow sensor 4614, wherein the first pressure sensor 4612 measures an outlet pressure of the cooling circulation system, the first temperature sensor 4613 measures an outlet temperature of the cooling circulation system, and the first flow sensor 4614 measures an outlet flow of the cooling circulation system, so as to monitor the temperature, the pressure and the flow of the cooling circulation system, so as to adjust the flow state of the cooling circulation system.

The control system adjusts the water delivery pressure or the water delivery temperature or the water delivery flow rate at the water outlet of the cooling circulation water tank 4608 according to the received pressure information, temperature information, and flow rate information of the water outlet of the cooling circulation water tank 4608.

Specifically, a PLC control system is arranged in each of the control cabinet 4611 and the control cabinet 50, the electric valve 4606 and the cooling water pump 4607 on the cooling circulation system are connected to the PLC control system, a PID control program is arranged in the PLC control system, and process parameters of each part of the device in operation are monitored in real time and intelligently controlled, so that the device is controlled more flexibly, working processes among the parts are matched with each other in a coordinated mode, and the reliability of the device is improved.

The PLC control system collects and analyzes the detection information, and is used to control the pressure, temperature, and flow rate at the water outlet of the cooling circulation water tank 4608, thereby realizing stable and accurate supply of cooling water; a cooling water pump 4607 is used for providing continuous stable pressurized cooling water for the system; the electric valve 4606 is used for realizing quick cutting of cooling water, reducing manual operation and realizing automatic control; the inductive power supply 4616 is connected to a control system to control the frequency of the current of the inductive power supply 4616; the first liquid level sensor 4615 is configured to detect a change in a state of a liquid level in the condensate tank, ensure that the liquid level fluctuates in a certain range, and realize replenishment and discharge of cooling water in the cooling circulation tank 4608 according to detected liquid level information.

The cooling water pump 4607 is automatically started when the computer is started, and the electric valve 4606 is automatically started when the computer is started; under the action of the cooling water pump 4607, the cooling water in the cooling circulation water tank 4608 flows out from a water outlet of the cooling circulation water tank 4608, flows through the cooling water pump 4607 and the electric valve 4606, then sequentially flows through the induction power supply 4616 and the electromagnetic induction coil 4604, and then is conveyed back to the cooling circulation water tank 4608, so that a circulation cooling process is completed.

The second temperature sensor 4617 measures the wall temperature of the fluid transport tube 4602, so that the state of the fluid transport tube 4602 can be known and problems can be found out in time. The second temperature sensor 4617 is configured to detect a temperature condition in the electromagnetic induction coil 4604, and when the temperature exceeds a set value, the control system should immediately respond to the temperature condition, control and adjust the frequency of the induction power supply 4616 and/or the flow rate of the evaporation circulation fluid in the circulation conduit of the evaporator system, monitor the wall temperature of the fluid transport conduit 4602, increase the opening degree of the electric valve 4606, and increase the water supply amount of the cooling water.

A first liquid level sensor 4615 is arranged on the cooling circulation water tank 4608, the first liquid level sensor 4615 is connected to the control system, the first liquid level sensor 4615 feeds back detected liquid level information of the liquid in the cooling circulation water tank 4608 to the control system, and the control system adjusts the amount of the liquid in the cooling circulation water tank 4608 according to the received liquid level information of the liquid in the cooling circulation water tank 4608.

The control system realizes the information acquisition of each sensor and realizes the functions of linkage, feedback and protection according to the written control logic.

As shown in fig. 5, the inductive power supply 4616 is a power conversion or generation device that converts a common power frequency 50Hz alternating current into thousands to tens of thousands Hz, specifically, the inductive power supply 4616 includes a rectifier 4621, a filter 4620, an inverter 4619 and a frequency modulation transformer 4618, the rectifier 4621, the filter 4620, the inverter 4619 and the frequency modulation transformer 4618 are sequentially connected, the rectifier 4621 is connected to the alternating current power supply, the inductive power supply 4616 is connected to the electromagnetic induction coil 4604 to form a closed loop, and the closed loop means that the positive and negative poles of the inductive power supply are respectively connected to the two ends of the induction coil, so as to ensure that a current passes through the coil.

The rectifier 4621 is connected with power frequency alternating current, the power frequency alternating current is processed by the rectifier 4621 to obtain pulsating direct current, the pulsating direct current flows into the filter 4620, the filter 4620 is processed to obtain stable direct current, the stable direct current flows into the inverter 4619, the inverter 4619 is processed to obtain alternating current, the alternating current flows into the frequency modulation transformer 4618, and the frequency modulation transformer 4618 is processed to obtain variable frequency alternating current, so that the frequency of the power supply is adjusted, and a medium/high frequency power supply is provided.

In the MVR evaporation circulation system, an electromagnetic scale inhibition and removal device 46 is additionally arranged, so that the scale in the pipeline can be effectively removed, the pipeline is prevented from continuously scaling, and the problem of scaling of the pipeline is fundamentally solved.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

In addition, in the description of the present invention, "a plurality", and "a plurality" mean two or more unless otherwise specified.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a sled dress formula MVR evaporation plant, its characterized in that includes raw materials feed system, evaporation cycle system, vacuum system, waste heat recovery system, raw materials feed system includes head tank, pre-heater, evaporation cycle system includes evaporimeter, separator, steam generator, steam cleaner and compressor, vacuum system includes the vacuum pump, waste heat recovery system includes the water tank, the material in the head tank gets into the pre-heater preheats, and the material gets into after preheating the evaporimeter, connect on the evaporimeter steam generator, steam generator provides the heat source for the evaporimeter, the material is in heat absorption gets into in the evaporimeter the separator, the material is in concentrate in the separator and discharge after reaching the settlement concentration, the material that does not reach the settlement concentration in the separator flows back in the evaporimeter, steam in the separator gets into after the steam filter filters the compressor, the compressor heats and pressurizes steam and then reflows to the evaporator to provide a heat source for materials in the evaporator, the heat source pipeline of the evaporator is connected with the vacuum pump, the vacuum pump pumps vacuum tail gas in the heat source pipeline, and the vacuum tail gas pumped by the vacuum pump enters the raw material tank to exchange heat and then flows into the water tank;

the compressor also comprises an oil supply system, the oil supply system comprises an oil tank, the oil tank provides lubricating oil for the compressor,

the preheater comprises a cooling water preheater and a condensate preheater, and the materials in the raw material tank sequentially enter the cooling water preheater and the condensate preheater;

the oil tank is internally provided with a heat absorption coil pipe, cooling water in the water tank flows into the heat absorption coil pipe, the cooling water in the heat absorption coil pipe exchanges heat with oil liquid in the oil tank, the cooling water in the water tank absorbs heat and then flows into the cooling water preheater as a heat source, materials in the cooling water preheater are preheated for the first time, the cooling water flows back to the water tank after exchanging heat in the cooling water preheater, and the materials flow into the condensate preheater.

2. The skid-mounted MVR evaporation apparatus of claim 1, wherein said compressor is provided as a screw vapor compressor, said compressor comprising a self-lubricating water supply,

and the lubricating oil flows into the compressor through the oil supply pump and the oil supply filter and then returns to the oil tank from an oil way outlet of the compressor.

3. The skid-mounted MVR evaporation device according to claim 2, wherein a cooling water heat exchange coil is arranged in the water tank of the waste heat recovery system, and cooling water in the cooling water heat exchange coil exchanges heat in the water tank;

4. The skid-mounted MVR evaporation plant according to claim 1, wherein a plurality of connection ports of the vacuum pump and the evaporator are distributed on the evaporator at intervals, the vacuum pump is connected with a vacuum regulating valve, the vacuum pump is further connected with a water tank water supply pipeline, and the water tank provides working fluid for the vacuum pump.

5. The skid-mounted MVR evaporation device according to claim 1, wherein a return pipeline is arranged between the separator and the evaporator, and an electromagnetic scale-inhibiting and descaling device is connected to the return pipeline;

6. The skid-mounted MVR evaporation device according to claim 5, wherein the magnetic field receiving assembly comprises a magnetic focusing tube core, the magnetic focusing tube core is arranged in the fluid conveying pipeline, the magnetic focusing tube core is provided as a solid cylinder, and the magnetic focusing tube core is coaxial with the fluid conveying pipeline;

7. The skid-mounted MVR evaporation device according to claim 5 or 6, wherein the preheater is communicated with the return pipeline, a forced circulation pump is connected to the return pipeline, and the material in the preheater enters the evaporator through an inlet of the forced circulation pump.

8. The skid-mounted MVR evaporation device of claim 2, further comprising a control system,

9. The skid-mounted MVR evaporation plant according to claim 1, further comprising a skid-mounted frame, wherein the evaporator and the separator are installed in parallel in the transverse direction of the skid-mounted frame, the vapor filter is connected to the top of the evaporator, the separator and the raw material tank are installed in parallel in the longitudinal direction of the skid-mounted frame, a preheater is arranged below the separator, the compressor is arranged in parallel at the top of the evaporator, a condensing tank is connected to the lower portion of one side of the evaporator, which is far away from the separator, and a plurality of pumps are arranged in parallel at the bottom of the skid-mounted frame.

10. The skid-mounted MVR evaporation plant according to claim 2, wherein the evaporator is provided in a plate type or shell and tube structure, a vapor baffle is provided at a vapor inlet of the evaporator, and an outlet pipe of the compressor extends into the bottom of the water collecting tank.