CN109292902A - A kind of ammonia-soda process solvay liquor heat recovery technology - Google Patents
A kind of ammonia-soda process solvay liquor heat recovery technology Download PDFInfo
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- CN109292902A CN109292902A CN201811303058.8A CN201811303058A CN109292902A CN 109292902 A CN109292902 A CN 109292902A CN 201811303058 A CN201811303058 A CN 201811303058A CN 109292902 A CN109292902 A CN 109292902A
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- gas
- ammonia
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- solvay liquor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
- F28C3/08—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour with change of state, e.g. absorption, evaporation, condensation
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of ammonia-soda process solvay liquor heat recovery technologies, belong to liquid waste disposal technique field, the present invention passes through scientific and reasonable equipment and process, the temperature of high temperature solvay liquor is reduced well while the heat in high temperature solvay liquor can also be re-used generates electricity, solve the problems, such as that high temperature solvay liquor influences pipeline scarring, and the utilization efficiency of the energy is improved, waste liquid conveying problem is solved and increases economic benefit simultaneously.
Description
Technical field
The present invention relates to liquid waste disposal technique fields, more particularly relate to ammonia-soda process solvay liquor heat recovery technology.
Background technique
Soda ash is important the raw material of industry, is production glass, chemicals, soap and detergent, papermaking and many households
The base stock of the consumer goods.Although developed country and developing country are not quite similar to the consumption of soda ash, general proportions
Are as follows: glass industry accounts for the 50% of soda ash total quantity consumed, and chemical industry accounts for 20%, and light industry accounts for 10%, and other industry accounts for 20%.
Soda ash is a kind of important raw material of industry, and China is also the production and consumption big country of soda ash.According to Chinese soda industry
The data of association's publication, China's soda ash annual output is more than 20,000,000 tons within 2010~2012 years.The processing of solvay liquor is current
The a great problem of world's soda industry, according to measuring and calculating, 1 ton of soda ash of every production will generate about 10 tons of solvay liquors, these solvay liquors
Temperature is at 85-90 DEG C, and since solvay liquor is corrosive, and in the event of high temperatures, corrosive effect is greatly improved, although pipe
Road passes through preservative treatment, but is still difficult to avoid that influence of the high temperature solvay liquor to pipeline, so that pipeline solution is scabbed, makes simultaneously
Contain many heats in alkali wasteliquid, these heats are difficult to efficiently use.
Summary of the invention
In order to overcome the drawbacks of the prior art, technical problem to be solved by the present invention lies in propose a kind of ammonia-soda process alkaline
Spent liquor recovery recovery technology, the present invention reduce high temperature solvay liquor by scientific and reasonable equipment and process well
Temperature simultaneously can also by the heat in high temperature solvay liquor re-use generate electricity, solve high temperature solvay liquor influence pipe
The problem of road scabs, and the utilization efficiency of the energy is improved, it solves waste liquid conveying problem and increases economic benefit simultaneously.
To achieve this purpose, the present invention adopts the following technical scheme:
The present invention provides a kind of ammonia-soda process solvay liquor heat recovery technology,
S1: gained high temperature wastewater after ammonia-soda process alkaline is passed into cyclone hydraulic separators, fraction solids particle is removed, is obtained
To primary liquor；
S2: primary liquor is passed into spiral sand separator, is removed the solid particle in waste liquid, is obtained second level solution；
S3: second level solution is passed through in screw expansion dynamic power unit, and the screw expansion dynamic power unit includes
Screw expander and generator, screw expander handle low-pressure state, and using waste liquid, flash steam generates gas-liquid under low pressure
Two phase flow, second level solution are converted into female rotor and male rotor rotation, thermal energy conversion in biphase gas and liquid flow lead-screw expanding machine
For electric energy, the female rotor or male rotor are connected by speed reducer with the rotation axis of generator, the outlet medium of screw expander
For gas-liquid two-phase, one layer of Titanium electroplated layer is arranged in the screw expander inside；
S4: the outlet medium of gas-liquid two-phase is passed through in gas-liquid separator and carries out gas-liquid separation, liquid passes through system after separation
Alkali wasteliquid pump is delivered in tempering tank, and gas enters mixing condenser and recirculated water mixed heat transfer, the condensed liquid of gas
Enter in circulating water device with recirculated water；
S5: remaining gas is emptied by water ring vacuum pump after S4 is handled.
In preferably technical solution of the invention, in the screw expander, the revolving speed of female rotor and male rotor is
1500rpm。
In preferably technical solution of the invention, the screw expansion dynamic power unit is warmed up manually when first used
Machine processing, first slowly opens the inlet valve of screw expander, stablizes generator speed and continues 20min, frequency in 600r/min
20Hz；Inlet valve is adjusted again, is stablized generator speed and is continued 10min, frequency 40Hz in 1000r/min；Finally adjust again into
Mouth valve stablizes generator speed and continues 30min, frequency 50Hz in 1500r/min；S1 step is carried out after the completion of warming-up operation again
Suddenly.
In preferably technical solution of the invention, the screw expansion dynamic power unit is warmed up automatically when first used
Machine processing, setting first stage warm-up period are 6min, stablize generator speed in 600r/min, frequency 20Hz；Setting the
Two-stage warm-up period is 6min, stablizes generator speed in 1200r/min, frequency 40Hz；After the completion of warming-up operation again into
Row S1 step.
In preferably technical solution of the invention, the second level solution is passed through the pipeline and screw expansion of screw expander
Thermometer and pressure gauge are equipped on the pipeline of machine output gas-liquid two-phase.
In preferably technical solution of the invention, the high temperature wastewater is conveyed by solvay liquor delivery pump, described
Solvay liquor delivery pump is centrifugal delivery pump, and the delivery rate of solvay liquor delivery pump is 212.5m3/h。
In preferably technical solution of the invention, the inspiratory capacity of the water ring vacuum pump is 1860m3/ h, pressure of inspiration(Pi) are
0.008MPa, pressure at expulsion 0.1kPa.
In preferably technical solution of the invention, the gas-liquid separator is the gas-liquid separator of horizontal ellipse head, institute
The latus rectum for stating gas-liquid separator is φ=5000*10612.
In preferably technical solution of the invention, the second level solution temperature into screw expander is not less than 69 DEG C.
In preferably technical solution of the invention, the flow of the high temperature wastewater is 450t/h.
The invention has the benefit that
Ammonia-soda process solvay liquor heat recovery technology provided by the invention,
It is high since screw expander is internally provided with Titanium electroplated layer by scientific and reasonable equipment and process
The solvay liquor of temperature does not allow perishable screw expander, enters the solvay liquor of overheat in screw expander, and yin is pushed to turn
Son and male rotor rotation, drive generator rotation, convert mechanical energy for the thermal energy of solvay liquor and be then converted to motor, enable
Source is reused, and improves the utilization rate of the energy；
Its temperature of the solvay liquor being discharged from screw expander is generally below 50 DEG C, and the solvay liquor lower than 50 DEG C is not
Be easy to make pipeline scarring, reduce the temperature of high temperature solvay liquor, at the same by the heat in high temperature solvay liquor re-use into
Row power generation solves the problems, such as that high temperature solvay liquor influences pipeline scarring, and under low-pressure state, flash steam produces waste liquid under low pressure
Angry liquid two-phase lead-screw expanding machine rotation, while most of gas phase conversion is liquid phase, keeps low pressure in screw expander,
The utilization efficiency of the energy is improved, waste liquid conveying problem is solved and increases economic benefit simultaneously.
Specific embodiment
Below and pass through specific embodiment to further illustrate the technical scheme of the present invention.
Equipment used by following example 1 and embodiment 2 is equal are as follows:
Screw expansion generating set: model SEPG1000-300/3000-1.65-S, parameter 300kW-1500rpm-
400V；
Solvay liquor delivery pump: centrifugal solvay liquor delivery pump, Q=212.5m3/ h H=25m；
Water ring vacuum pump: Q (inspiratory capacity)=1860m3/ h, pressure of inspiration(Pi): 0.008MPa (a) pressure at expulsion: 0.1KPa
(a)；Motor: 55KW；
Gas-liquid separator: horizontal ellipse head gas-liquid separator, φ 5000*10612, V=191m3。
Embodiment 1:
A kind of ammonia-soda process solvay liquor heat recovery technology is provided in embodiment 1,
Manual warming-up processing is carried out to the screw expansion dynamic power unit used for the first time, first slowly opens screw expander
Inlet valve, stablize generator speed and in 600r/min continue 20min, frequency 20Hz；Inlet valve is adjusted again, turns generator
Speed, which is stablized, continues 10min, frequency 40Hz in 1000r/min；It finally adjusts inlet valve again, stablizes generator speed in 1500r/
Min continues 30min, frequency 50Hz；S1 step is carried out after the completion of warming-up operation again.
S1: gained high temperature wastewater after ammonia-soda process alkaline is passed into cyclone hydraulic separators, fraction solids particle is removed, is obtained
To primary liquor；High temperature wastewater is conveyed by solvay liquor delivery pump, and the solvay liquor delivery pump is centrifugal conveying
Pump, the delivery rate of solvay liquor delivery pump are 212.5m3/h；The flow of high temperature wastewater is 450t/h；
S2: primary liquor is passed into spiral sand separator, is removed the solid particle in waste liquid, is obtained second level solution；
S3: second level solution is passed through in screw expansion dynamic power unit, the second level solution into screw expander
Temperature is not less than 69 DEG C, and the screw expansion dynamic power unit includes screw expander and generator, and second level solution pushes
Female rotor and male rotor rotation in screw expander, the female rotor or male rotor pass through the rotation axis of speed reducer and generator
Connect, the outlet medium of screw expander is gas-liquid two-phase, and one layer of Titanium electroplated layer is arranged inside the screw expander；Spiral shell
The female rotor of bar expanding machine and the revolving speed of male rotor are 1500rpm；The second level solution be passed through the pipeline of screw expander with
And thermometer and pressure gauge are equipped on the pipeline of screw expander output gas-liquid two-phase；
S4: the outlet medium of gas-liquid two-phase being passed through in gas-liquid separator and carries out gas-liquid separation, and the gas-liquid separator is
The gas-liquid separator of horizontal ellipse head, the latus rectum of the gas-liquid separator are φ=5000*10612, and liquid is defeated logical after separation
It crosses solvay liquor to be pumped in tempering tank, gas enters mixing condenser and recirculated water mixed heat transfer, the condensed liquid of gas
Body enters in circulating water device with recirculated water；
S5: remaining gas is emptied by water ring vacuum pump after S4 is handled, and the inspiratory capacity of water ring vacuum pump is 1860m3/
H, pressure of inspiration(Pi) 0.008MPa, pressure at expulsion 0.1kPa.
Embodiment 2:
A kind of ammonia-soda process solvay liquor heat recovery technology is provided in embodiment 2,
Automatic warming processing is carried out to the screw expansion dynamic power unit used for the first time, first stage warm-up period is set
For 6min, stablize generator speed in 600r/min, frequency 20Hz；Setting second stage warm-up period is 6min, makes to generate electricity
Machine stabilization of speed is in 1200r/min, frequency 40Hz；S1 step is carried out after the completion of warming-up operation again.
S1: gained high temperature wastewater after ammonia-soda process alkaline is passed into cyclone hydraulic separators, fraction solids particle is removed, is obtained
To primary liquor；High temperature wastewater is conveyed by solvay liquor delivery pump, and the solvay liquor delivery pump is centrifugal conveying
Pump, the delivery rate of solvay liquor delivery pump are 212.5m3/h；The flow of high temperature wastewater is 450t/h；
S2: primary liquor is passed into spiral sand separator, is removed the solid particle in waste liquid, is obtained second level solution；
S3: second level solution is passed through in screw expansion dynamic power unit, the second level solution into screw expander
Temperature is not less than 69 DEG C, and the screw expansion dynamic power unit includes screw expander and generator, and second level solution pushes
Female rotor and male rotor rotation in screw expander, the female rotor or male rotor pass through the rotation axis of speed reducer and generator
Connect, the outlet medium of screw expander is gas-liquid two-phase, and one layer of Titanium electroplated layer is arranged inside the screw expander；Spiral shell
The female rotor of bar expanding machine and the revolving speed of male rotor are 1500rpm；The second level solution be passed through the pipeline of screw expander with
And thermometer and pressure gauge are equipped on the pipeline of screw expander output gas-liquid two-phase；
S4: the outlet medium of gas-liquid two-phase being passed through in gas-liquid separator and carries out gas-liquid separation, and the gas-liquid separator is
The gas-liquid separator of horizontal ellipse head, the latus rectum of the gas-liquid separator are φ=5000*10612, and liquid is defeated logical after separation
It crosses solvay liquor to be pumped in tempering tank, gas enters mixing condenser and recirculated water mixed heat transfer, the condensed liquid of gas
Body enters in circulating water device with recirculated water；
S5: remaining gas is emptied by water ring vacuum pump after S4 is handled, and the inspiratory capacity of water ring vacuum pump is 1860m3/
H, pressure of inspiration(Pi) 0.008MPa, pressure at expulsion 0.1kPa.
Embodiment 1 and embodiment 2 are detected respectively into the solvay liquor temperature before and after screw expander, point
The alkaline after solvay liquor 1h, 3h and 5h mean temperature and discharge screw expander before screw expander Ji Suan not entered
Waste liquid 1h, 3h and 5h mean temperature, then the energy for being converted into electric energy is calculated, compare the energy of electric energy and the calorimeter of consumption
The energy transformation ratio for calculating solvay liquor, obtains the energy transformation ratio of solvay liquor in embodiment 1 and embodiment 2, as a result such as
Shown in table 1；Embodiment 1 and embodiment 2 are handled same solvay liquor with same processing speed, and setting pair
According to group, high temperature wastewater is discharged directly from pipeline, without screw expander, the speed and reality of the solvay liquor of control group discharge
Apply example 1 and embodiment 2 be identical, handle 12h daily, continuous processing 14 days, observe respectively control group pipeline and embodiment 1 with
And the situation that scabs of pipeline that 2 solvay liquor of embodiment is discharged from screw expander, the results are shown in Table 2.
Table 1
It can be obtained from table 1, embodiment 1 and embodiment 2 are all not much different to the converting heat rate of solvay liquor, the heat of the two
Conversion ratio is all more satisfactory, substantially increases the utilization rate of energy.
Table 2
It can be obtained from table 2, embodiment 1 and embodiment 2 have stronger protective effect to pipeline, discharge from pipeline by 14 days
There is not the situation that scabs in a large amount of solvay liquor, and junction of the control group after 14 days solvay liquors discharge, between pipeline
It scabs, is easily damaged pipeline for a long time, later maintenance processing is more troublesome, it is seen that embodiment 1 can be good at embodiment 2
Solve the problems, such as that solvay liquor influences pipeline scarring.
The present invention is described with reference to the preferred embodiments, and those skilled in the art know, of the invention not departing from
In the case where spirit and scope, various changes or equivalence replacement can be carried out to these features and embodiment.The present invention is not by this
The limitation of specific embodiment disclosed in place, other embodiments fallen into claims hereof belong to protection of the present invention
Range.
Claims (10)
1. a kind of ammonia-soda process solvay liquor heat recovery technology, which comprises the steps of:
S1: gained high temperature wastewater after ammonia-soda process alkaline is passed into cyclone hydraulic separators, fraction solids particle is removed, obtains one
Grade solution；
S2: primary liquor is passed into spiral sand separator, is removed the solid particle in waste liquid, is obtained second level solution；
S3: second level solution is passed through in screw expansion dynamic power unit, and the screw expansion dynamic power unit includes screw rod
Expanding machine and generator, screw expander handle low-pressure state, and second level solution is converted into the expansion of biphase gas and liquid flow lead-screw
Female rotor and male rotor rotation, the female rotor or male rotor are connected by speed reducer with the rotation axis of generator in machine, spiral shell
The outlet medium of bar expanding machine is gas-liquid two-phase, and one layer of Titanium electroplated layer is arranged inside the screw expander；
S4: the outlet medium of gas-liquid two-phase being passed through in gas-liquid separator and carries out gas-liquid separation, and liquid is useless by alkaline after separation
Liquid pump is delivered in tempering tank, and gas enters mixing condenser and recirculated water mixed heat transfer, and the condensed liquid of gas is with following
Ring water enters in circulating water device；
S5: remaining gas is emptied by water ring vacuum pump after S4 is handled.
2. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
In the screw expander, the revolving speed of female rotor and male rotor is 1500rpm.
3. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
The screw expansion dynamic power unit carries out manual warming-up processing when first used, first slowly opens screw expander
Inlet valve stablizes generator speed and continues 20min, frequency 20Hz in 600r/min；Inlet valve is adjusted again, makes generator speed
Stablize and continues 10min, frequency 40Hz in 1000r/min；It finally adjusts inlet valve again, stablizes generator speed in 1500r/
Min continues 30min, frequency 50Hz；S1 step is carried out after the completion of warming-up operation again.
4. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
The screw expansion dynamic power unit carries out automatic warming processing when first used, and setting first stage warm-up period is
6min stablizes generator speed in 600r/min, frequency 20Hz；Setting second stage warm-up period is 6min, makes generator
Stabilization of speed is in 1200r/min, frequency 40Hz；S1 step is carried out after the completion of warming-up operation again.
5. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
The second level solution is passed through on the pipeline of screw expander and the pipeline of screw expander output gas-liquid two-phase and is equipped with
Thermometer and pressure gauge.
6. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
The high temperature wastewater is conveyed by solvay liquor delivery pump, and the solvay liquor delivery pump is centrifugal delivery pump,
The delivery rate of solvay liquor delivery pump is 212.5m3/h。
7. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
The inspiratory capacity of the water ring vacuum pump is 1860m3/ h, pressure of inspiration(Pi) 0.008MPa, pressure at expulsion 0.1kPa.
8. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
The gas-liquid separator is the gas-liquid separator of horizontal ellipse head, and the latus rectum of the gas-liquid separator is φ=5000*
10612。
9. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
The second level solution temperature into screw expander is not less than 69 DEG C.
10. ammonia-soda process solvay liquor heat recovery technology according to claim 1, it is characterised in that:
The flow of the high temperature wastewater is 450t/h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167143A (en) * | 2020-01-14 | 2020-05-19 | 江西晶昊盐化有限公司 | Cooling and conveying technology for waste liquid generated in alkali production by ammonia-soda process |
| CN114440653A (en) * | 2022-02-11 | 2022-05-06 | 江西晶昊盐化有限公司 | Recycling system and recycling method for soda condensate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167143A (en) * | 2020-01-14 | 2020-05-19 | 江西晶昊盐化有限公司 | Cooling and conveying technology for waste liquid generated in alkali production by ammonia-soda process |
| CN114440653A (en) * | 2022-02-11 | 2022-05-06 | 江西晶昊盐化有限公司 | Recycling system and recycling method for soda condensate |
| CN114440653B (en) * | 2022-02-11 | 2023-07-21 | 江西晶昊盐化有限公司 | Soda condensate water recycling system and recycling method |
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Application publication date: 20190201 |