CN108992964A - A kind of vacuum crystallization system and method - Google Patents
A kind of vacuum crystallization system and method Download PDFInfo
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- CN108992964A CN108992964A CN201810802413.XA CN201810802413A CN108992964A CN 108992964 A CN108992964 A CN 108992964A CN 201810802413 A CN201810802413 A CN 201810802413A CN 108992964 A CN108992964 A CN 108992964A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0018—Evaporation of components of the mixture to be separated
- B01D9/0022—Evaporation of components of the mixture to be separated by reducing pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
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Abstract
The present invention relates to vacuum crystallization fields, disclose a kind of vacuum crystallization system and method, including crystallizing tank, hot water storgae, cooling tower and circulating pump；It further include condenser, vacuum pump, cold rinse bank and water supply pump, crystallizing tank is connected to condenser, vacuum pump is connected to condenser, cold rinse bank is connected to water supply pump, water supply pump is connected to condenser, and the hot water that condenser generates is discharged into hot water storgae, and hot water storgae is connected to circulating pump, circulating pump is connected to cooling tower, and cooling tower is connected to cold rinse bank.When carrying out vacuum crystallization production using this method, steam in crystallizing tank does not need first to be condensed into liquid water again through steam jet pump extraction, but the steam in crystallizing tank is directly condensed into liquid water discharge, and vacuum pump only extracts fixed gas out, steam pumping is not needed, therefore saves operation energy consumption.This method can just put into water cooler work to greatest extent using the cooling capacity of environment come the steam of condensation-crystallization tank output, only when vapor (steam) temperature is down to close to environment temperature.
Description
Technical field
The present invention relates to vacuum crystallization field more particularly to a kind of vacuum crystallization system and method.
Background technique
The vacuum crystallization method of traditional titanium liquid is extracted out the steam in crystallizing tank by vacuum equipments such as steam jet pumps, is made
Steam increasing temperature and pressure discharge in crystallizing tank, is then condensed with steam of the cooling water to extraction again.It is asked existing for this method
Topic is:
1. can bring a large amount of latent heat of vaporization into using steam as the power vacuumized into system, make the consumption of cooling water
Increase.
2. interior vacuum degree is high, and steam is very thin after the temperature in crystallizing tank reduces, as when the titanium liquid in crystallizing tank
When temperature is down to 20 DEG C, saturated vapor temperature is only 17 DEG C or so, and corresponding saturated vapor density only has 15.35 grams/side,
I.e. 1 side's steam is often sucked out in steam jet pump out of crystallizing tank, and the titanium liquid in crystallizing tank just evaporates 15 grams of water.Produce 1 ton of titanium
White powder evaporates 1.05 tons of water in crystallized region needs out of crystallizing tank, therefore production process needs to consume a large amount of working steam.
According to statistics, industry while needing to consume the electric energy of 82KW.H in the steam consumption average out to 1.3-1.5 tons/ton titanium dioxide of this workshop section.
3. carrying out the production activity of titanium liquid vacuum crystallization using method provided by the invention, consumption working steam is not needed, is put down
Titanium dioxide per ton only needs consumption electric energy about 110KW.H.
4. vacuum crystallization energy consumption cost of the invention and traditional vacuum crystallization energy consumption cost ratio, then titanium dioxide per ton is saved
180*1.4+0.78*82-0.78*110=230 yuan/ton of cost, the enterprise of 50,000 tons of titanium dioxides is produced per year to one, using traditional titanium
Liquid vacuum crystallization method ratio needed more 11,500,000 yuan of expenditures using vacuum crystallization method provided by the invention 1 year.
Summary of the invention
The present invention provides a kind of vacuum crystallization system and its side for vacuum crystallization disadvantage at high cost in the prior art
Method.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals:
A kind of vacuum crystallization system, crystallizing tank, hot water storgae, cooling tower and circulation including the liquid for accommodating heat
Pump；It further include condenser, vacuum pump, cold rinse bank and water supply pump, crystallizing tank is connected to by pipeline with condenser, and vacuum pump passes through pipe
Road is connected to condenser, and cold rinse bank is connected to by pipeline with water supply pump, and water supply pump is connected to by pipeline with condenser, and condenser produces
Raw hot water by the way that in discharge of pipes to hot water storgae, hot water storgae is connected to by pipeline with circulating pump, circulating pump pass through pipeline with it is cold
But tower is connected to, and cooling tower is connected to by pipeline with cold rinse bank.
Preferably, further including water cooler, water cooler is connected to by pipeline cold water slot, and condenser and cold rinse bank connect
It is logical.
Preferably, hot water storgae is connected by pipeline and the water inlet of water cooler, the water outlet of water cooler passes through pipe
Road is connected to cold rinse bank.
A kind of vacuum crystallization method, includes the following steps:
Step a: the liquid of heat is encased in crystallizing tank by inlet valve, when liquid object quality reaches setting liquid level
When, the inlet valve and blow-off valve on crystallizing tank are closed, crystallizing tank forms a sealing container；
Step b: starting vacuum pump extracts the air in crystallizing tank and condenser out, and the liquid in crystallizing tank is low
Pressure boils and evaporates steam, and the liquid in crystallizing tank starts decrease temperature crystalline, and steam is flowed into condenser by pipeline
It is interior；
Step c: starting water supply pump pumps to the cold water in cold rinse bank in condenser, the steam in crystallizing tank is condensing
Liquid water is condensed into device, the pressure in crystallizing tank persistently reduces, and the hot liquid substance constantly boiling in crystallizing tank simultaneously evaporates
Steam out, steam are flowed into condenser by pipeline, the liquid continued down crystallization in crystallizing tank；
Step d: the steam in condenser forms hot water after exchanging with cooling water heat, and hot water is drained into hot water by pipeline
In slot；
Step e: opening circulating pump, and the hot water in hot water storgae is pumped to and carries out cooling treatment, shape in cooling tower by circulating pump
At cold water, cold water is drained into cold rinse bank by cooling tower.
Preferably, liquid temperature hot in step a is at 40 DEG C~90 DEG C.
Preferably, the liquid in step b in crystallizing tank boils under the low pressure of 1kpa~70kpa and evaporates steaming
Vapour.
Preferably, further including step f, step f: when the liquid temperature in crystallizing tank is close to environment temperature, stopping
Only run circulating pump and cooling tower.
Preferably, further including step g, step g: starting water cooler, water cooler provide temperature into cold rinse bank and are
17 DEG C of low-temperature cold waters below, water supply pump pump to the low-temperature cold water in cold rinse bank in condenser, low-temperature cold water and condenser
Hot water is formed after interior steam heat exchange, hot water directly passes through pipeline and is discharged into cold rinse bank, and the steam in crystallizing tank continues quilt
It takes away, the pressure in crystallizing tank persistently reduces, and liquid constantly boiling and evaporates steam in crystallizing tank, in crystallizing tank
The crystallization of liquid continued down.
Preferably, liquid temperature hot in crystallizing tank drops to 5 DEG C~25 DEG C, water cooler stops working.
The present invention is due to using above technical scheme, with significant technical effect:
When carrying out vacuum crystallization production using this method, the steam in crystallizing tank is not first to condense again through jet pump extraction,
But steam is first condensed into hydraulic water, make crystallizing tank continue to be evaporated in vacuo, vacuum pump only extracts fixed gas out, because can be big
Amplitude saves operation energy consumption.
This method can be to greatest extent using the cooling capacity of environment come the steam of condensation-crystallization tank output, only when vapor (steam) temperature drops
When to close to environment temperature, just puts into water cooler and work.
Detailed description of the invention
Fig. 1 is system frame structure schematic diagram of the invention.
The toponym that each number designation is referred in the figures above is as follows: where 10-crystallizing tanks, 11-hot water storgaes,
12-cooling towers, 13-circulating pumps, 14-condensers, 15-vacuum pumps, 16-cold rinse banks, 17-water supply pumps, 18-cooling-water machines
Group.
Specific embodiment
Present invention is further described in detail with embodiment with reference to the accompanying drawing.
Embodiment 1
A kind of vacuum crystallization system, as shown in Figure 1, including crystallizing tank 10, hot water storgae for accommodating the liquid of heat
11, cooling tower 12 and circulating pump 13, the present embodiment liquid are titanium liquid；It further include condenser 14, vacuum pump 15, cold rinse bank 16
With water supply pump 17, crystallizing tank 10 is connected to by pipeline with condenser 14, and vacuum pump 15 is connected to by pipeline with condenser 14, cold water
Slot 16 is connected to by pipeline with water supply pump 17, and water supply pump 17 is connected to by pipeline with condenser 14, the hot water that condenser 14 generates
By in discharge of pipes to hot water storgae 11, hot water storgae 11 is connected to by pipeline with circulating pump 13, circulating pump 13 pass through pipeline with it is cold
But tower 12 is connected to, and cooling tower 12 is connected to by pipeline with cold rinse bank 16.
It further include water cooler 18, water cooler 18 is connected to by pipeline with cold rinse bank 16, condenser 14 and cold rinse bank 16
Connection.The hot water of the present embodiment condenser 14 first flows in hot water storgae 16, hot water storgae 16 by pipeline and water cooler 18 into
The mouth of a river connects, and the hot water in hot water storgae 16 is flowed into water cooler 18 again, and the water outlet of water cooler 18 passes through pipeline and cold water
Slot 16 is connected to, and water cooler 18 cools down hot water treatment to be flowed into cold rinse bank 16 again at after cold water.
A kind of vacuum crystallization method, includes the following steps:
Step a: the titanium liquid by temperature in 40 DEG C of heat is encased in crystallizing tank 10 by inlet valve, is set when titanium liquid measure reaches
When determining liquid level, the inlet valve and blow-off valve on crystallizing tank 10 are closed, crystallizing tank 10 forms a sealing container；
Step b: starting vacuum pump 15 is extracted the air in crystallizing tank 10 and condenser 14 out, the titanium liquid in crystallizing tank 10
It boils under low pressure and evaporates steam, the titanium liquid in crystallizing tank 10 starts decrease temperature crystalline, and steam is flowed into condensation by pipeline
In device 14；
Step c: starting water supply pump 17 pumps to the cold water in cold rinse bank 16 in condenser 14, the steaming in crystallizing tank 10
Vapour is condensed into liquid water in condenser 14, and the pressure in crystallizing tank 10 persistently reduces, and the hot titanium liquid in crystallizing tank 10 continues
It boils and evaporates steam, steam is flowed into condenser 14 by pipeline, the titanium liquid continued down crystallization in crystallizing tank 10；
Step d: the steam in condenser 14 forms hot water after exchanging with cooling water heat, and hot water is drained into heat by pipeline
In sink 11；
Step e: opening circulating pump 13, and the hot water in hot water storgae 11 is pumped in cooling tower 12 and cooled down by circulating pump 13
Processing, forms cold water, and cold water is drained into cold rinse bank 16 by cooling tower 12.
Titanium liquid in step b in crystallizing tank 10 boils under the low pressure of 1kpa and evaporates steam, the titanium in crystallizing tank 10
Liquid comes to life and evaporates steam.
Further include step f, step f: due to the time passage crystallized with titanium liquid, the temperature in crystallizing tank 10 constantly drops
Low, when the titanium liquid temperature in crystallizing tank 10 is close to environment temperature, the cold water that cooling tower 12 generates will be unable in condenser 14
Steam condenses, at this time circulating pump 13 and cooling tower 12 out of service.
Further include step g, step g: starting water cooler 18, it is 17 DEG C that water cooler 18, which provides temperature into cold rinse bank 16,
Low-temperature cold water below, the present embodiment water cooler 18 provide the low-temperature cold water that temperature is 7 DEG C, water supply pump 17 into cold rinse bank 16
Low-temperature cold water in cold rinse bank 16 is pumped in condenser 14, shape after low-temperature cold water is exchanged with the steam heat in condenser 14
At hot water, hot water directly passes through pipeline and is discharged into cold rinse bank 16, and the steam in crystallizing tank 10 is persistently pulled away, in crystallizing tank 10
Pressure persistently reduces, and titanium liquid constantly boiling and evaporates steam in crystallizing tank 10, the titanium liquid continued down knot in crystallizing tank 10
It is brilliant.
Hot titanium liquid temperature drops to 5 DEG C in crystallizing tank 10, and the present embodiment drops to 17 when titanium liquid temperature hot in crystallizing tank 10
DEG C, water cooler 18 stops working.
Traditional vacuum crystallization method, titanium dioxide average of the whole year per ton need to consume the electric energy of 1.4 tons of steam and 82KW.H,
And this programme does not consume steam, average of the whole year titanium dioxide per ton only needs to consume the electric energy of 110KW.H, and steam cost presses 180 yuan/ton,
Electricity presses 0.78 yuan/kw.h, then titanium dioxide per ton saves 180*1.4+0.78*82-0.78*110=230 yuan/ton of cost, to one
It produces the enterprise of 50,000 tons of titanium dioxides per year, saves 11,500,000 yuan within 1 year.And it invests less than 10,000,000, current year recoverable investment.
Embodiment 2
Embodiment 2 and 1 feature of embodiment are essentially identical, the difference is that in embodiment 2
Hot liquid temperature is 65 DEG C in step a；
Titanium liquid in step b in crystallizing tank 10 boils under the low pressure of 35kpa and evaporates steam；
Hot titanium liquid temperature drops to 15 DEG C in crystallizing tank 10, and water cooler 18 stops working.
Embodiment 3
Embodiment 3 and 1 feature of embodiment are essentially identical, the difference is that in embodiment 3
Hot liquid temperature is 90 DEG C in step a；
Titanium liquid in step b in crystallizing tank 10 boils under the low pressure of 70kpa and evaporates steam；
Hot titanium liquid temperature drops to 25 DEG C in crystallizing tank 10, and water cooler 18 stops working.
Embodiment 4
Embodiment 4 and 1 feature of embodiment are essentially identical, the difference is that the hot water in embodiment 4 in condenser 14 passes through pipe
Road is fed directly in cold rinse bank 16, without hot water storgae 11, the inlet and outlet of water cooler 18 all with cold rinse bank 16
Connection.
Embodiment 5
Embodiment 5 and 1 feature of embodiment are essentially identical, the difference is that the hot water of condenser 14 first flows to heat in embodiment 5
In sink 11, the hot water in hot water storgae 11 passes through pipeline again and is fed directly in cold rinse bank 16, the water inlet of water cooler 18 and
Water outlet is all connected to cold rinse bank 16.
In short, the foregoing is merely presently preferred embodiments of the present invention, it is all according to equalization made by scope of the present invention patent
Variation and modification, shall all be covered by the patent of the invention.
Claims (9)
1. a kind of vacuum crystallization system, including crystallizing tank (10), the hot water storgae (11), cooling tower for accommodating hot liquid substance
(12) and circulating pump (13)；It is characterized by also including condenser (14), vacuum pump (15), cold rinse bank (16) and water supply pumps
(17), crystallizing tank (10) is connected to by pipeline with condenser (14), and vacuum pump (15) is connected to by pipeline with condenser (14), cold
Sink (16) is connected to by pipeline with water supply pump (17), and water supply pump (17) is connected to by pipeline with condenser (14), condenser
(14) hot water generated is interior to hot water storgae (11) by discharge of pipes, and hot water storgae (11) is connected to by pipeline with circulating pump (13),
Circulating pump (13) is connected to by pipeline with cooling tower (12), and cooling tower (12) is connected to by pipeline with cold rinse bank (16).
2. a kind of vacuum crystallization system according to claim 1, it is characterised in that: further include water cooler (18), cold water
Unit (18) is connected to by pipeline with cold rinse bank (16), and condenser (14) is connected to cold rinse bank (16).
3. a kind of vacuum crystallization system according to claim 2, it is characterised in that: hot water storgae (16) passes through pipeline and cold water
The water inlet of unit (18) connects, and the water outlet of water cooler (18) is connected to by pipeline with cold rinse bank (16).
4. a kind of vacuum crystallization method according to claim 1 to 3, characterized by the following steps:
Step a: the liquid of heat is encased in crystallizing tank (10) by inlet valve, when liquid object quality reaches setting liquid level
When, the inlet valve and blow-off valve on crystallizing tank (10) are closed, crystallizing tank (10) forms a sealing container；
Step b: the air in crystallizing tank (10) and condenser (14) is extracted in starting vacuum pump (15) out, in crystallizing tank (10)
Liquid boils under low pressure and evaporates steam, and the liquid in crystallizing tank (10) starts decrease temperature crystalline, and steam passes through
Pipeline is flowed into condenser (14)；
Step c: starting water supply pump (17) pumps to the cold water in cold rinse bank (16) in condenser (14), in crystallizing tank (10)
Steam be condensed into liquid water in the condenser (14), the pressure in crystallizing tank (10) persistently reduces, in crystallizing tank (10)
The liquid constantly boiling of heat simultaneously evaporates steam, and steam is flowed into condenser (14) by pipeline, in crystallizing tank (10)
Liquid continued down crystallization；
Step d: the steam in condenser (14) forms hot water after exchanging with cooling water heat, and hot water is drained into hot water by pipeline
In slot (11)；
Step e: opening circulating pump (13), and the hot water in hot water storgae (11) is pumped in cooling tower (12) and carried out by circulating pump (13)
Cooling treatment, forms cold water, and cold water is drained into cold rinse bank (16) by cooling tower (12).
5. a kind of vacuum crystallization method according to claim 4, it is characterised in that: hot liquid temperature in step a
At 40 DEG C~90 DEG C.
6. a kind of vacuum crystallization method according to claim 4, it is characterised in that: the liquid in step b in crystallizing tank (10)
State substance boils under the low pressure of 1kpa~70kpa and evaporates steam.
7. a kind of vacuum crystallization method according to claim 4, it is characterised in that: further include step f, step f: work as crystallization
When liquid temperature in tank (10) is close to environment temperature, circulating pump (13) out of service and cooling tower (12).
8. a kind of vacuum crystallization method according to claim 7, it is characterised in that: further include step g, step g: starting is cold
Water dispenser group (18), it is 17 DEG C of low-temperature cold waters below, water supply pump (17) that water cooler (18), which provides temperature into cold rinse bank (16),
Low-temperature cold water in cold rinse bank (16) is pumped in condenser (14), the steam heat in low-temperature cold water and condenser (14) is handed over
Hot water is formed after changing, hot water directly passes through pipeline and is discharged into cold rinse bank (16), and the steam in crystallizing tank (10) is persistently pulled away, knot
Pressure in brilliant tank (10) persistently reduces, and liquid is in the interior constantly boiling of crystallizing tank (10) and evaporates steam, crystallizing tank
(10) the liquid continued down crystallization in.
9. a kind of vacuum crystallization method according to claim 7, it is characterised in that: hot liquid in crystallizing tank (10)
Temperature drops to 5 DEG C~25 DEG C, and water cooler (18) stops working.
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| CN201810802413.XA CN108992964B (en) | 2018-07-20 | 2018-07-20 | Vacuum crystallization system and method thereof |
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| CN201810802413.XA CN108992964B (en) | 2018-07-20 | 2018-07-20 | Vacuum crystallization system and method thereof |
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Cited By (3)
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| CN109731366A (en) * | 2019-01-30 | 2019-05-10 | 天津乐科节能科技有限公司 | A kind of freezing water law vacuum cooled crystal system and method |
| CN110755875A (en) * | 2019-11-24 | 2020-02-07 | 湖南力泓新材料科技股份有限公司 | Evaporation crystallization device for preparing zinc sulfate crystals |
| CN113772884A (en) * | 2021-09-03 | 2021-12-10 | 西安交通大学 | Coking wastewater treatment system and method |
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| CN113772884A (en) * | 2021-09-03 | 2021-12-10 | 西安交通大学 | Coking wastewater treatment system and method |
| CN113772884B (en) * | 2021-09-03 | 2022-12-13 | 西安交通大学 | Coking wastewater treatment system and method |
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| CN108992964B (en) | 2020-12-29 |
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Denomination of invention: A vacuum crystallization system and its method Effective date of registration: 20230210 Granted publication date: 20201229 Pledgee: Xiaoshan sub branch of Hangzhou United Rural Commercial Bank Co.,Ltd. Pledgor: HANGZHOU ANYONG ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2023330000353 |
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