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Application method of mvr heat pump evaporation salt production in multi-effect vacuum salt production technology

A heat pump evaporation and vacuum salt production technology, applied in the field of salt production, can solve the problems of large investment in new construction and waste of assets, and achieve the effects of short investment recovery period, energy saving and equipment investment.

Active Publication Date: 2022-06-21
SHANDONG CAIYANGZI SALTWORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] How to apply the MVR heat pump evaporation salt production technology to the existing vacuum salt production evaporation equipment, there are two methods, one is new construction, the other is technical transformation, the investment in new construction is large, and the existing equipment will be idle, resulting in waste of assets

Method used

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  • Application method of mvr heat pump evaporation salt production in multi-effect vacuum salt production technology
  • Application method of mvr heat pump evaporation salt production in multi-effect vacuum salt production technology
  • Application method of mvr heat pump evaporation salt production in multi-effect vacuum salt production technology

Examples

Experimental program
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Effect test

Embodiment 1

[0051] like figure 2 As shown, the evaporation and crystallization process of MVR heat pump evaporation salt production in the multi-effect vacuum salt production technology, the specific steps include:

[0052] 1. The sea salt from the salt pond is sent to the salt washing yard for temporary storage after the salt washing process; the temporarily stored solid salt enters the disc feeder through the raw salt hopper and is quantitatively fed to the raw salt belt; conveyed by the raw salt belt It is mixed with the condensed water from the evaporation device, dissolved, and made into refined brine, which enters the evaporation and drying system.

[0053] 2. The brine temporarily stored in the brine pool is pumped to the filter for filtration, and the filtered brine enters the mixing tank to become brine; the brine in the mixing drum is pumped to the secondary pre-treatment by the mixing pump. After the heater exchanges heat with the condensed water and increases the temperature...

Embodiment 2

[0070] like figure 1 As shown, the brine treatment process of MVR heat pump evaporation salt production in the multi-effect vacuum salt production technology, the specific steps include:

[0071] 1. The brine with the NaCl content of 310 g / L obtained after dissolving the original salt is input into the reaction barrel, the soda ash is added to adjust the pH value to 8, and then the brine is input into the clarification barrel and clarified to obtain the upper layer of refined brine;

[0072] 2. The upper layer of refined brine is transported to the refined brine tank, and is pumped to the preheater through the mixing pump. The refined brine is preheated to 98-101 °C and then enters the circulation pipe for forced circulation, and then enters the five-effect evaporation system;

[0073] 3. In the five-effect evaporation system, the steam pressure at the outlet of the compressor is controlled at 169.1kpa, and the pressure in the evaporation chamber is controlled at -0.001Mpa. Af...

Embodiment 3

[0077] like image 3 As shown, the steam treatment process of MVR heat pump evaporation salt production in the multi-effect vacuum salt production technology, the specific steps include:

[0078] 1. There are two raw steams from the boundary area. The first raw steam enters the MVR evaporation device as a heat source for system startup and a supplementary heat source for the normal operation of the system; the second raw steam enters the air preheater for preheating. Air, as the heat source of the drying system;

[0079] The volume ratio of the first raw steam to the second raw steam is 1:1.

[0080] 2. The secondary steam evaporated from each effect is respectively removed by the demister to remove the entrained mist, and then aggregated into the gas scrubbing tower. After being washed by the circulating condensed water in the scrubbing tower, it enters the steam compressor. compression;

[0081] The inlet medium of the steam compressor is saturated water vapor, the inlet ...

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Abstract

The application method of MVR heat pump evaporation salt production in multi-effect vacuum salt production technology includes evaporation crystallization process, brine treatment process, steam treatment process, condensed water treatment process, and non-condensable gas treatment process; the steam treatment process will produce The steam is passed into the MVR evaporator and the air preheater; the secondary steam evaporated from each effect is respectively removed from the entrained mist by the demister, and then aggregated into the scrubber, where it is washed by circulating condensed water , into the steam compressor for compression; the secondary steam is compressed in the compressor and then enters each effect heating chamber as a heat source; the application method of the present invention can reduce energy consumption by 40.5%; the project construction period is only 8 months; Less land occupation, less investment in equipment and facilities; investment payback period is only 3.34 years.

Description

technical field [0001] The invention relates to the technical field of salt production, in particular to an application method of MVR heat pump evaporation salt production in the multi-effect vacuum salt production technology. Background technique [0002] MVR is the abbreviation of mechanical vapor recompression technology (mechanical vapor recompression), which uses the secondary steam and its energy generated by the evaporation system itself to upgrade the low-grade steam into a high-grade steam heat source through the mechanical work of the compressor. This cycle provides heat energy to the evaporation system, thereby reducing the demand for external energy, an energy-saving technology. [0003] In the original multi-effect vacuum salt production, steam is generally generated by burning coal in a power station boiler, and the steam is used to generate electricity, and the steam after power generation is reused for vacuum salt production. Emissions have put forward highe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/00B01D1/30B01D9/02B01D1/26B01D3/06F25B30/06
CPCB01D1/0011B01D1/26B01D1/30B01D9/0031B01D3/06B01D1/0082F25B30/06
Inventor 杨伟杨彩霞王志册单宝成张元刚
Owner SHANDONG CAIYANGZI SALTWORKS
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