CN102627299A - Low-temperature heatless vacuum salt making device - Google Patents

Low-temperature heatless vacuum salt making device Download PDF

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Publication number
CN102627299A
CN102627299A CN2011103301420A CN201110330142A CN102627299A CN 102627299 A CN102627299 A CN 102627299A CN 2011103301420 A CN2011103301420 A CN 2011103301420A CN 201110330142 A CN201110330142 A CN 201110330142A CN 102627299 A CN102627299 A CN 102627299A
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China
Prior art keywords
motor
control valve
pipeline
driven control
temperature
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Pending
Application number
CN2011103301420A
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Chinese (zh)
Inventor
王石柱
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Shang ShangShi Energy Technology Co., Ltd.
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王石柱
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Priority to CN2011103301420A priority Critical patent/CN102627299A/en
Publication of CN102627299A publication Critical patent/CN102627299A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a low-temperature heatless vacuum salt making device, which comprises an evaporation system which is composed of an evaporator, a heat exchanger, a forced evaporation circulating pump disposed between the evaporator and the heat exchanger, and a brine preheater, an inlet end of the brine preheater being provided with a brine pump, a steam compression system which is composed of a high-speed centrifugal blower, a compression steam superheating degree elimination system which is composed of a humidifier mounted at an outlet of the high-speed centrifugal blower, a vacuum keeping system which comprises a non-condensable gas collector disposed between the evaporator and the high-speed centrifugal blower, the non-condensable gas collector being equipped with a vacuum pump, a denitration system which comprises a temperature transmitter connected with the heat exchanger and a denitration pot connected with the temperature transmitter, and a control system which comprises a controller and a display connected with the controller. The invention has the following beneficial effects: energy consumption is low, maintenance is convenient, installation and debugging are simple, and production line capacity can be adjusted freely.

Description

Low temperature does not have the thermovacuum salt making apparatus
Technical field
The present invention relates to a kind of low temperature and do not have the thermovacuum salt making apparatus.
Background technology
As everyone knows; Mechanical compression type heat pump in the evaporation salt making technology (being called for short MVR) technology and multiple-effect vacuum-evaporation (being called for short ME) technology all have the high drawback of energy consumption; Because salt industry belongs to the highly energy-consuming industry; Its development receives the restriction of national industrial policies; And for enterprise, above-mentioned evaporation salt making technology exists maintenance to need that complete machine stops production, Installation and Debugging are complicated and can't realize freely adjusting and reducing drawback such as production line production capacity, but how to change this general layout and provide that a kind of energy consumption is relatively low, maintenance is convenient, Installation and Debugging are simple and salt making apparatus free adjustment production line production capacity is a technical problem underlying to be solved by this invention.
Summary of the invention
In order to address the above problem, a kind of energy consumption is low, maintenance is convenient, Installation and Debugging are simple and low temperature free adjustment production line production capacity does not have the thermovacuum salt making apparatus but provide exactly for the object of the invention.
To achieve these goals, the present invention adopts following technical scheme:
A kind of low temperature does not have the thermovacuum salt making apparatus, it is characterized in that, comprising:
One vapo(u)rization system; Forced evaporation recycle pump, bittern preheater by an evaporating pot, an interchanger and are located between evaporating pot and interchanger are formed; Said bittern preheater inlet end is provided with brine pump; Pipeline between said forced evaporation circulating-pump outlet and heat exchanger entrance is provided with first motor-driven control valve, and the pipeline between said brine pump outlet and bittern preheater inlet is provided with second motor-driven control valve;
One steam compression system is made up of high-speed centrifugal fan, and it is located between evaporating pot and the interchanger;
One compressed vapour superheating temperature is eliminated system, and it is made up of the humidifying device of being located at the high-speed centrifugal fan exit;
One vacuum keeps system, comprises the non-condensable gases air collector of being located between evaporating pot and high-speed centrifugal fan, and this non-condensable gases air collector is provided with a vacuum pump;
One denitrating system, it comprises the denitration jar that the temperature transmitter, that is connected with interchanger is connected with temperature transmitter, and this denitration jar links to each other with evaporating pot, and the signal output part of this temperature transmitter links to each other with the signal input part of first motor-driven control valve;
One system comprises unit, the indicating meter that is connected with unit; Wherein,
Said evaporating pot bottom is connected with a water seal salt pool device; Said denitration pot bottom is connected with a water seal nitre pool device; Said water seal salt pond bottom of device and water seal nitre pool device bottom is respectively equipped with the pipeline A and the pipeline B that link to each other with the pipeline of brine pump inlet end; Said pipeline A and pipeline B are respectively equipped with the 3rd motor-driven control valve and the 4th motor-driven control valve, and said the 3rd motor-driven control valve all is connected with unit with the 4th motor-driven control valve.
Said evaporating pot is provided with a fluid level transmitter, and this fluid level transmitter signal output part links to each other with the second motor-driven control valve signal input part.
Preferably, said humidifying device is for being located at ducted some shower nozzles.
Preferably, said unit is the PLC unit.
Principle of work of the present invention is:
1, salt-making process: core of the present invention is that a kind of high potential that utilizes makes heat flow to the device of high-order thermal source from low level heat energy.Though consume a certain amount of high potential (electric energy), the heat of being supplied with is the summation of the low-grade heat of the high potential that consumes and absorption.When the present invention works, at first adopt vacuum pump that the air in the evaporating pot is extracted out, reach the corresponding saturation pressure of brine temperature in the evaporating pot; Be full of moist steam in the evaporating pot this moment; Come the low-temp low-pressure saturation steam of flash tank to be sucked,, improve the pressure and the temperature of saturation of secondary steam through the adiabatic compression effect of high-speed boosting blower fan by the high-speed boosting blower fan; Send the interchanger of forced evaporation system then back to, use as heating steam.The high-speed boosting blower fan consumes certain electric energy in this process.With the bittern heat exchange, lower the temperature after the bittern after temperature raises gets into the evaporating pot flash distillation behind the heating steam entering interchanger, flash steam is sucked by the high-speed boosting blower fan, forms working cycle.Bittern after the cooling is admitted to the heating of bittern interchanger through recycle pump.The water of condensation of discharging from the bittern interchanger gets into the bittern preheater, and the bittern that preheating newly replenishes is discharged then, successively circulation.The magnitude of recruitment of new bittern passes through the variable valve real-time regulated according to the liquid level of evaporating pot; Bittern is constantly separated out solid salt in evaporating pot, under the effect of gravity, solid salt drops to the water seal salt pond, and sees the water seal salt pond off through bucket conveyor.
2, denitrification process: because bittern circulating and evaporating in evaporating pot, nitre content constantly increases, and therefore need the nitre in the bittern be deviate from, to guarantee the quality of salt.Denitrification process is to flow into the denitration jar after the bittern entering interchanger of circulating and evaporating is heated to 80-100 ℃, because nitre is that high temperature is separated out, so under this temperature, separate out solid nitre, the hot brine after the separation flows into the evaporating pot evaporation, circulates successively thus.
The invention has the beneficial effects as follows:
1, because total system all operates in and is no more than 80 ℃ low-temperature zone, and material will further reduce the corrosion of device, prolong the operation and maintenance expense of equipment greatly, reduces running cost.
2, because equipment adopts little unit multi-machine parallel connection mode to move, can carry out routine preventive maintenance or emergency maintenance to the separate unit unit easily, not need the whole production system parking maintenance, not have the overhaul phase, improve user's production efficiency greatly.
3, this device no longer needs huge circulating water system, has practiced thrift great amount of water resources and environmental pollution that sewage discharge brought, has saved equipment power consumption and maintenance costs such as original water system blower fan, water pump simultaneously.
4, with respect to existing purified salt technology, " low temperature does not have the thermovacuum salt making apparatus " ton salt comprehensive energy consumption will be brought huge economic and social benefit to the user less than 60kwh.
5, the Installation and Debugging of " low temperature does not have the thermovacuum salt making apparatus " are relatively simple, and the user only need provide refining bittern, electric energy and suitable place, and device just can utilize modular standardized component, and Fast Installation puts into production; Very favourable for the increase and decrease production capacity, only need increase and decrease modularization unit, just can accomplish, and it is also very favourable to produce load for adjustment, the quantity through the adjustment unit can let unit be fully operational in the top efficiency state.
Description of drawings
Fig. 1 is principle of the invention figure.
Among the figure: the 1-evaporating pot; The 2-interchanger; 3-forced evaporation recycle pump; 4-bittern preheater; The 5-brine pump; 6-first motor-driven control valve; 7-second motor-driven control valve; The 8-high-speed centrifugal fan; The 9-humidifying device; 10-non-condensable gases air collector; The 11-vacuum pump; The 12-temperature transmitter; 13-denitration jar; 14-water seal salt pool device; 15-water seal nitre pool device; 16-pipeline A; 17-pipeline B; 18-the 3rd motor-driven control valve; 19-the 4th motor-driven control valve; The 20-fluid level transmitter;
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further elaboration.
As shown in Figure 1; A kind of low temperature does not have the thermovacuum salt making apparatus; It comprises: a vapo(u)rization system, form by forced evaporation recycle pump 3, bittern preheater 4 that an evaporating pot 1, an interchanger 2 and are located between evaporating pot and interchanger, because this device employing single-effect evaporation; Therefore the evaporating pot diameter is selected for use bigger; The diameter of selecting for use in the present embodiment is controlled at about 2m, and said bittern preheater 4 also is provided with a condensation-water drain, and said bittern preheater inlet end is provided with brine pump 5; Pipeline between said forced evaporation circulating-pump outlet and heat exchanger entrance is provided with first motor-driven control valve 6, and the pipeline between said brine pump outlet and bittern preheater inlet is provided with second motor-driven control valve 7;
One steam compression system is made up of high-speed centrifugal fan 8, and it is located between evaporating pot and the interchanger, and high-speed centrifugal fan transient equilibrium characteristic is good, shakes for a short time, and the basis requires simple, and fault is few, and working reliability is high, therefore as the first-selection of this device;
One compressed vapour superheating temperature is eliminated system, and it is made up of the humidifying device of being located at the high-speed centrifugal fan exit 9, as preferably; This humidifying device can be arranged in the pipeline by annular array for being located at ducted some shower nozzles, and quantity is according to the diameter control of pipeline; It is 3~5 shower nozzles that common annular array is provided with quantity, and the group numerical control is built in 3~4 groups, certainly; Also can be intended to reduce the disadvantageous effect of superheating temperature arranging 8~10 shower nozzles along the pipeline bearing of trend to condensation heat transfer;
One vacuum keeps system; Comprise the non-condensable gases air collector of being located between evaporating pot and high-speed centrifugal fan 10, this non-condensable gases air collector is provided with a vacuum pump 11, and this device must be at continuous operation under the vacuum state; It is most important to keep stable vacuum tightness that stablizing of system reached energy consumption; When the incoagulability air collector was set, it highly must be higher than high-speed centrifugal fan 8, was beneficial to the works better of incoagulability air collector; Vacuum keeps the correlation parameter of the control of system according to the incoagulability air collector, is controlled by system of the present invention;
One denitrating system, it comprises the denitration jar 13 that the temperature transmitter 12, that is connected with interchanger is connected with temperature transmitter, and this denitration jar links to each other with evaporating pot, and the signal output part of this temperature transmitter links to each other with the signal input part of first motor-driven control valve;
One system comprises unit, the indicating meter that is connected with unit; Wherein,
Said evaporating pot bottom is connected with a water seal salt pool device 14; Said denitration pot bottom is connected with a water seal nitre pool device 15; Said water seal salt pond bottom of device and water seal nitre pool device bottom is respectively equipped with the pipeline A16 and the pipeline B17 that link to each other with the pipeline of brine pump inlet end; Said pipeline A and pipeline B are respectively equipped with the 3rd motor-driven control valve 18 and the 4th motor-driven control valve 19, and said the 3rd motor-driven control valve all is connected with unit with the 4th motor-driven control valve.
Said evaporating pot is provided with a fluid level transmitter 20, and this fluid level transmitter signal output part links to each other with the second motor-driven control valve signal input part.
Said unit is the PLC unit.
Principle of work of the present invention is following:
At first, adopt vacuum pump that the air in the evaporating pot is extracted out, reach the corresponding saturation pressure of brine temperature in the evaporating pot; Be full of moist steam in the evaporating pot this moment; Come the low-temp low-pressure saturation steam of flash tank to be sucked,, improve the pressure and the temperature of saturation of secondary steam through the adiabatic compression effect of high-speed boosting blower fan by the high-speed boosting blower fan; Send the interchanger of forced evaporation system then back to, use as heating steam.With the bittern heat exchange, lower the temperature after the bittern after temperature raises gets into the evaporating pot flash distillation behind the heating steam entering interchanger, flash steam is sucked by the high-speed boosting blower fan, forms working cycle.Bittern after the cooling is admitted to the heating of bittern interchanger through recycle pump.The water of condensation of discharging from the bittern interchanger gets into the bittern preheater, and the bittern that preheating newly replenishes is discharged then, successively circulation.The magnitude of recruitment of new bittern cooperates the one the first motor-driven control valves to realize according to the liquid level detection device of evaporating pot; Bittern is constantly separated out solid salt in evaporating pot, under the effect of gravity, solid salt drops to the water seal salt pond, and sees the water seal salt pond off through bucket conveyor.
Moreover the bittern of circulating and evaporating gets into and flows into the denitration jar after interchanger is heated to 80-100 ℃, because nitre is that high temperature is separated out, so under this temperature, separate out solid nitre, the hot brine after the separation flows into the evaporating pot evaporation, thus circulation successively.
The above is merely preferred implementation of the present invention, and protection scope of the present invention is not limited in above-mentioned embodiment, and every technical scheme that belongs to the principle of the invention all belongs to protection scope of the present invention.For a person skilled in the art, some improvement of under the prerequisite that does not break away from principle of the present invention, carrying out, these improvement also should be regarded as protection scope of the present invention.

Claims (4)

1. a low temperature does not have the thermovacuum salt making apparatus, it is characterized in that, comprising:
One vapo(u)rization system; Forced evaporation recycle pump, bittern preheater by an evaporating pot, an interchanger and are located between evaporating pot and interchanger are formed; Said bittern preheater inlet end is provided with brine pump; Pipeline between said forced evaporation circulating-pump outlet and heat exchanger entrance is provided with first motor-driven control valve, and the pipeline between said brine pump outlet and bittern preheater inlet is provided with second motor-driven control valve;
One steam compression system is made up of high-speed centrifugal fan, and it is located between evaporating pot and the interchanger;
One compressed vapour superheating temperature is eliminated system, and it is made up of the humidifying device of being located at the high-speed centrifugal fan exit;
One vacuum keeps system, comprises the non-condensable gases air collector of being located between evaporating pot and high-speed centrifugal fan, and this non-condensable gases air collector is provided with a vacuum pump;
One denitrating system, it comprises the denitration jar that the temperature transmitter, that is connected with interchanger is connected with temperature transmitter, and this denitration jar links to each other with evaporating pot, and the signal output part of this temperature transmitter links to each other with the signal input part of first motor-driven control valve;
One system comprises unit, the indicating meter that is connected with unit; Wherein,
Said evaporating pot bottom is connected with a water seal salt pool device; Said denitration pot bottom is connected with a water seal nitre pool device; Said water seal salt pond bottom of device and water seal nitre pool device bottom is respectively equipped with the pipeline A and the pipeline B that link to each other with the pipeline of brine pump inlet end; Said pipeline A and pipeline B are respectively equipped with the 3rd motor-driven control valve and the 4th motor-driven control valve, and said the 3rd motor-driven control valve all is connected with unit with the 4th motor-driven control valve.
2. low temperature as claimed in claim 1 does not have the thermovacuum salt making apparatus, it is characterized in that, said evaporating pot is provided with a fluid level transmitter, and this fluid level transmitter signal output part links to each other with the second motor-driven control valve signal input part.
3. low temperature as claimed in claim 1 does not have the thermovacuum salt making apparatus, it is characterized in that, said unit is the PLC unit.
4. low temperature as claimed in claim 1 does not have the thermovacuum salt making apparatus, it is characterized in that, said humidifying device is for being located at ducted some shower nozzles.
CN2011103301420A 2011-10-26 2011-10-26 Low-temperature heatless vacuum salt making device Pending CN102627299A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103123107A (en) * 2013-03-06 2013-05-29 宁波金海德旗化工有限公司 Device for recovering waste heat and supplying steam through multistage dilatation flashing
CN106705492A (en) * 2017-01-09 2017-05-24 中国科学院理化技术研究所 External heating wet compression MVR (mechanical vapor recompression) system

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CN202297162U (en) * 2011-10-24 2012-07-04 王石柱 Low temperature pyrogen-free vacuum salt production device

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Publication number Priority date Publication date Assignee Title
CN201183754Y (en) * 2008-02-03 2009-01-21 杨成友 Secondary steam high pressure evaporation apparatus
CN201930556U (en) * 2010-12-30 2011-08-17 四川蓝光伟业高新技术有限公司 Mechanical compression heat pump evaporation system for brine concentration
CN202297162U (en) * 2011-10-24 2012-07-04 王石柱 Low temperature pyrogen-free vacuum salt production device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103123107A (en) * 2013-03-06 2013-05-29 宁波金海德旗化工有限公司 Device for recovering waste heat and supplying steam through multistage dilatation flashing
CN103123107B (en) * 2013-03-06 2017-02-15 宁波金海晨光化学股份有限公司 Device for recovering waste heat and supplying steam through multistage dilatation flashing
CN106705492A (en) * 2017-01-09 2017-05-24 中国科学院理化技术研究所 External heating wet compression MVR (mechanical vapor recompression) system

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Owner name: SHANGHAI SHANGSHI ENERGY TECHNOLOGY CO., LTD.

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Address after: 200040, room 2, building 738, 313 Guang Ji Road, Shanghai, Hongkou District

Applicant after: Shang ShangShi Energy Technology Co., Ltd.

Address before: 221400 No. 34, Xingang lane, Xinyi, Jiangsu

Applicant before: Wang Shizhu

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Application publication date: 20120808