CN103395851A

CN103395851A - Process for desalting brackish water

Info

Publication number: CN103395851A
Application number: CN2013103051049A
Authority: CN
Inventors: 刘辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-20
Filing date: 2013-07-20
Publication date: 2013-11-20

Abstract

The invention discloses a process for desalting brackish water. The process mainly consists of a turbine, a condenser, a condensate pump, a circulation cooling pump, a thermal vapor compression (TVC), a low-temperature multi-effect distillation (LT-MED) brackish water desalting device, a circulation water pump, a generator, a solution heat exchanger, an absorber, a solution pump, a condenser, a throttle valve and an evaporator, wherein a first-class absorption type heat pump is composed of the generator, the solution heat exchanger, the absorber, the solution pump, the condenser, the throttle valve and the evaporator. By utilizing the process, low-temperature steam exhaust of the turbine is effectively used, the working efficiency of the turbine is improved, and middle extracted steam is used efficiently, so that the water production cost is greatly lowered, the steam discharged from the tail end of the LT-MED device is efficiently used, and the conventional cooling process is omitted.

Description

A kind of desalinating process of brackish water

Technical field

The invention belongs to brackish water/sea water desaltination, energy-conserving and environment-protective technical field.

Background technology

The importance of water is self-evident, be accompanied by and industrializedly carry out fast, distribute unbalanced sino type lack of water, season unbalanced with the water resources regional distribution, and the groundwater pollution of in addition meanwhile following becomes already shortage of water resources and hinders a Root of Clark Clematis that realizes Chinese dream.

China is ocean big country, how from economical seawater, get the object that fresh water becomes people's broad research and exploration, all over China also gradually on the sea water desaltination project, carried out various trials and in many places, succeeded, but because cost is higher, make the sea water desaltination project of each place really not reach design load, economic benefit is general, and universal enthusiasm is lower.

On the other hand, aspect Oil extraction, due to the most of China oil field mainly to produce heavy oil as main, the main produce oil ground in grand celebration, triumph, the Liaohe River etc. at present, the crude oil production method is mainly take the thermal recovery of steam flood as main, Produced Liquid through precipitation, filter after, because saltiness is large, often can only re-injection, and in the thermal recovery process, injection boiler needs again to consume a large amount of supplementary feed, if after the salinity in brackish water being removed, regard boiler feedwater, will bring huge economic benefit.

Summary of the invention

The invention provides a kind of desalinating process of brackish water.

a kind of desalinating process of brackish water, mainly by steam turbine, condenser, condensate pump, the circulating cooling water pump, injector (TVC), low temperature multiple-effect distillation brackish water desalting equipment (LT-MED), water circulating pump, producer, solution heat exchanger, resorber, solution pump, condenser, throttling valve and vaporizer form, steam turbine has the intermediate extraction pipeline to be communicated with TVC working steam entrance, the steam turbine end is communicated with condenser, condenser also has condensate line with deoxygenator, to be communicated with after condensate pump, condenser is inner also has the recirculated cooling water pipeline to be communicated with vaporizer through the circulating cooling water pump, the LT-MED afterbody also has the refrigerant vapour passage to be communicated with TVC injection entrance, after the TVC outlet also has the refrigerant vapour passage and producer is communicated with, producer also has condensate line to be communicated with condenser, producer also has the finished product water lines to be communicated with outside, producer, solution heat exchanger, resorber, solution pump, condenser, throttling valve and vaporizer form first-class absorption type heat pump, LT-MED also have circulating water line through water circulating pump respectively with after resorber and condenser are communicated with, resorber and condenser also have the refrigerant vapour passage to be communicated with LT-MED, LT-MED also has respectively brackish water pipeline and strong brine pipeline to be communicated with outside, forms a kind of desalinating process of brackish water.

The accompanying drawing explanation

Accompanying drawing is depicted as desalinating process structure and the schematic flow sheet of a kind of brackish water provided by the invention.

In figure, 1-steam turbine, 2-condenser, 3-condensate pump, 4-circulating cooling water pump, 5-injector (TVC), 6-low temperature multiple-effect distillation sea water desalting device (LT-MED), 7-water circulating pump, 8-producer, 9-solution heat exchanger, 10-resorber, 11-solution pump, 12-condenser, 13-throttling valve, 14-vaporizer.

Embodiment

A kind of desalinating process of brackish water is achieved in that

1. on structure, by steam turbine 1, condenser 2, condensate pump 3, circulating cooling water pump 4, injector (TVC) 5, low temperature multiple-effect distillation brackish water desalting equipment (LT-MED) 6, water circulating pump 7, producer 8, solution heat exchanger 9, resorber 10, solution pump 11, condenser 12, throttling valve 13 and vaporizer 14 form, steam turbine 1 has the intermediate extraction pipeline to be communicated with TVC5 working steam entrance, steam turbine 1 end is communicated with condenser 2, condenser 2 also has condensate line with deoxygenator, to be communicated with after condensate pump 3, condenser 2 is inner also has the recirculated cooling water pipeline to be communicated with vaporizer 14 through circulating cooling water pump 4, LT-MED 6 afterbodys also have the refrigerant vapour passage to be communicated with TVC 5 injection entrances, after TVC 5 outlets also have the refrigerant vapour passage and producer 8 are communicated with, producer 8 also has condensate line to be communicated with condenser 2, producer 8 also has the finished product water lines to be communicated with outside, producer 8, solution heat exchanger 9, resorber 10, solution pump 11, condenser 12, throttling valve 13 and vaporizer 14 form first-class absorption type heat pump, LT-MED 6 also have circulating water line through water circulating pump 4 respectively with after resorber 10 and condenser 12 are communicated with, resorber 10 and condenser 12 also have the refrigerant vapour passage to be communicated with LT-MED 6, LT-MED 6 also has respectively brackish water pipeline and strong brine pipeline to be communicated with outside, forms a kind of desalinating process of brackish water.

2. on technique, by producer 8, solution heat exchanger 9, resorber 10, solution pump 11, condenser 12, throttling valve 13 and vaporizer 14 form the first-class absorption type heat pump circulation, main steam enters steam turbine 1 acting, wherein after the sub-fraction acting, become intermediate extraction and introduce TVC 5 as working steam, after another most of acting, become exhaust steam and enter condenser 2, the condensed water that obtains after condensing enters deoxygenator after condensate pump 3 boosts, the recirculated water that obtains after the refrigerant vapour that enters LT-MED 6 condenses after water circulating pump 7 boosts, flow through respectively resorber 10 and condenser 12, the refrigerant vapour of rear formation of being heated enters LT-MED 6 again, the refrigerant vapour that LT-MED 6 ends are discharged in TVC 5 by injection to comparatively high temps and pressure, enter the driving thermal medium of producer 8 as first-class absorption type heat pump, after the heat release condensation, a part enters condenser 2, another part as finished product water discharged to outside, recirculated cooling water enters vaporizer 14 and usings as all the other thermal mediums after the interior intensification of condenser 2, after heat release, through circulating cooling water pump 4, squeeze into condenser 2 again, so thereby circulation forms a kind of desalinating process of brackish water.

The effect that the technology of the present invention can realize---The desalinating process of a kind of brackish water proposed by the invention has following effect and advantage:

1. realize the effective utilization to the steam turbine low-temperature steam exhaust, improve the working efficiency of steam turbine.

2. realized the efficient utilization of being drawn gas in centre, this will significantly reduce makes the water cost.

3. realize the efficient utilization to LT-MED device end exhaust vapour, and saved its original process for cooling.

Claims

1. the desalinating process of a brackish water, mainly by steam turbine, condenser, condensate pump, the circulating cooling water pump, injector (TVC), low temperature multiple-effect distillation brackish water desalting equipment (LT-MED), water circulating pump, producer, solution heat exchanger, resorber, solution pump, condenser, throttling valve and vaporizer form, steam turbine has the intermediate extraction pipeline to be communicated with TVC working steam entrance, the steam turbine end is communicated with condenser, condenser also has condensate line with deoxygenator, to be communicated with after condensate pump, condenser is inner also has the recirculated cooling water pipeline to be communicated with vaporizer through the circulating cooling water pump, the LT-MED afterbody also has the refrigerant vapour passage to be communicated with TVC injection entrance, after the TVC outlet also has the refrigerant vapour passage and producer is communicated with, producer also has condensate line to be communicated with condenser, producer also has the finished product water lines to be communicated with outside, producer, solution heat exchanger, resorber, solution pump, condenser, throttling valve and vaporizer form first-class absorption type heat pump, LT-MED also have circulating water line through water circulating pump respectively with after resorber and condenser are communicated with, resorber and condenser also have the refrigerant vapour passage to be communicated with LT-MED, LT-MED also has respectively brackish water pipeline and strong brine pipeline to be communicated with outside, forms a kind of desalinating process of brackish water.