CN107243237A - A kind of TiCl4Device for absorbing tail gas and its absorption process - Google Patents
A kind of TiCl4Device for absorbing tail gas and its absorption process Download PDFInfo
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- CN107243237A CN107243237A CN201710709092.4A CN201710709092A CN107243237A CN 107243237 A CN107243237 A CN 107243237A CN 201710709092 A CN201710709092 A CN 201710709092A CN 107243237 A CN107243237 A CN 107243237A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
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Abstract
The invention discloses a kind of TiCl4Device for absorbing tail gas and its absorption process, device includes storage tank, surge tank, one-level alkali liquid tank and two grades of alkali liquid tanks, it is connected between storage tank and surge tank by bleeder pipe, it is connected between surge tank and one-level alkali liquid tank by one-level offgas duct, one-level offgas duct inlet end is in surge tank, one-level offgas duct outlet side is below alkali lye liquid level in one-level alkali liquid tank, it is connected between one-level alkali liquid tank and two grades of alkali liquid tanks by two grades of offgas ducts, two grades of offgas duct inlet ends are more than alkali lye liquid level in one-level alkali liquid tank, two grades of offgas duct outlet sides are below alkali lye liquid level in two grades of alkali liquid tanks, two grades of alkali liquid tanks connect exhaust emission tube, exhaust emission tube inlet end is more than alkali lye liquid level in two grades of alkali liquid tanks, exhaust emission tube outlet side is placed in air.Apparatus of the present invention are simple, effectively absorb titanium sponge production enterprise in TiCl4The tail gas produced in course of conveying, it is economic and environment-friendly.
Description
Technical field
The present invention relates to sponge titanium smelting field, and in particular to a kind of TiCl4Device for absorbing tail gas and its absorption process.
Background technology
TiCl4It is to produce one of primary raw material of titanium sponge, is a kind of sour corrosion product (classification of danger rule and numbering：GB
8.1 class 81051.UN No1838；IMDG CODE pages 8236,8.1 classes), the easily hydrolysis generation H in malaria2TiO3
And HCl, while with a large amount of corrosive milky smog, and with strong impulse smell.According to《Atmosphere pollution is comprehensive
Close discharge standard》Provided in (GB 16297-1996), the hydrogen chloride highest of new discharge of pollutant sources allows concentration of emission to be 1.9mg/
m3.At present, pars titanium manufacturing enterprise is by outsourcing or self-produced TiCl4Raw materials for production with storage tank course of conveying, in order to
Ensure that pressure balance needs the emission into air in storage tank, the main component of tail gas is the TiCl of gasification4If, without
Processing is exhausted directly in air, a large amount of acid (HCl) flue gases meeting severe contamination environment and deterioration operation field of generation, and to existing
The healthy of operating personnel causes to have a strong impact on, at the same can heavy corrosion place storage tank steel structure platform and near
Pipeline, door and window etc., there is certain potential safety hazard, the normal production and operation to enterprise bring environmental protection pressure and economic loss.
The content of the invention
It is an object of the invention to provide a kind of TiCl4Device for absorbing tail gas and its absorption process, to solve titanium sponge
Manufacturing enterprise is in TiCl4Fume emission problem in course of conveying, prevents the pollution of the environment, eliminates safe hidden trouble and reduces so as to reach
The purpose of economic loss.
To achieve the above object, the technical scheme is that, the TiCl4Device for absorbing tail gas includes storage tank, delayed
Rush in tank, one-level alkali liquid tank and two grades of alkali liquid tanks, the one-level alkali liquid tank and two grades of alkali liquid tanks and be respectively arranged with alkali lye, the storage tank
It is connected between surge tank by bleeder pipe, the bleeder pipe is provided with vent valve, the surge tank is provided with pressure sensing
Device, is connected between the surge tank and one-level alkali liquid tank by one-level offgas duct, and the one-level offgas duct inlet end is located at slow
Rush in tank, the one-level offgas duct outlet side is below alkali lye liquid level in one-level alkali liquid tank, and the one-level offgas duct is provided with
One-level exhaust valve, is connected between the one-level alkali liquid tank and two grades of alkali liquid tanks by two grades of offgas ducts, two grades of offgas ducts
Inlet end is more than alkali lye liquid level in one-level alkali liquid tank, two grades of offgas duct outlet sides alkali lye liquid in two grades of alkali liquid tanks
Below face, two grades of alkali liquid tanks connect exhaust emission tube, exhaust emission tube inlet end alkali lye in two grades of alkali liquid tanks
More than liquid level, the exhaust emission tube outlet side is placed in air, is also connected with the storage tank on feed pipe, the feed pipe
Provided with inlet valve.
It is preferred that, two grades of offgas ducts are provided with titanium tetrachloride gases sensor, two grades of tail gas branch pipes and two grades of tail gas
Valve, the titanium tetrachloride gases sensor is located at close to one-level alkali liquid tank side, and two grades of exhaust valves are located at close to two grades of alkali
Flow container side, two grades of tail gas branch pipes inlet end is located between titanium tetrachloride gases sensor and two grades of exhaust valves, and described two
Level tail gas branch pipe outlet side is below alkali lye liquid level in one-level alkali liquid tank, and two grades of tail gas branch pipes are provided with two grades of tail gas branch
Valve, two grades of branch pipe elastic bags and two grades of tail gas branch protection of pipe valves, two grades of tail gas branch valve are located at close to two grades of tail gas branch pipes
Inlet end side, two grades of tail gas branch protection of pipe valve is located at two grades of tail gas branch pipe outlet sides side, two grades of branch tubular elastics
Air bag is located between two grades of tail gas branch valves and two grades of tail gas branch protection of pipe valves, and two grades are provided with outside two grades of branch pipe elastic bags
Branch tube airbag is pressed from both sides.
It is preferred that, the exhaust emission tube is provided with HCl gas sensor, tail gas exhaust outlet and tail gas dump valve,
The HCl gas sensor is located at close to two grades of alkali liquid tank sides, and the tail gas dump valve is located to be gone out close to exhaust emission tube
Gas end side, the tail gas exhaust outlet inlet end is located between HCl gas sensor and tail gas dump valve, the tail gas
Exhaust outlet outlet side is below alkali lye liquid level in two grades of alkali liquid tanks, and the tail gas exhaust outlet discharges branch provided with tail gas
Valve, tail end branch pipe elastic bag and tail gas exhaust outlet protection valve, the tail gas discharge branch valve are located at close to tail gas exhaust outlet
Inlet end side, the tail gas exhaust outlet protection valve is located at tail gas exhaust outlet outlet side side, the tail end branch tubular elastic
Air bag is discharged between branch valve and tail gas exhaust outlet protection valve located at tail gas, and tail end is provided with outside the tail end branch pipe elastic bag
Branch tube airbag is pressed from both sides.
It is preferred that, the TiCl4Device for absorbing tail gas is additionally provided with control module, and the control module is provided with signal input part
And signal output part, the signal input part and pressure sensor, titanium tetrachloride gases sensor and HCl gas sensor
Electrical connection, the signal output part and vent valve, one-level exhaust valve, two grades of exhaust valves, two grades of tail gas branch valves, two grades of tail gas branch pipes
Valve, two grades of branch tube airbag folders, tail gas dump valve, tail gas discharge branch valve, tail gas exhaust outlets is protected to protect valve and tail end branch pipe gas
Capsule folder electrical connection.
It is preferred that, the surge tank, one-level alkali liquid tank and two grades of alkali liquid tank bottom sidewalls are equipped with discharge gate.
It is preferred that, it is equipped with observation panel on the surge tank, one-level alkali liquid tank and two grades of alkali liquid tanks.
It is preferred that, the material of the surge tank, one-level alkali liquid tank and two grades of alkali liquid tanks is the preserving timber including fiberglass
Material.
It is preferred that, the alkali lye is the NaOH solution of concentration about 20%.
The invention also provides one kind is based on TiCl4The TiCl of device for absorbing tail gas4Tail gas absorption method, the TiCl4Tail
Aspiration receiving method includes：
The TiCl of liquid in fluid reservoir4Volatilization forms TiCl4Tail gas；
TiCl4It is passed through successively after the buffered tank of tail gas in one-level alkali liquid tank and two grades of alkali liquid tanks；
In the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks, TiCl4Tail gas first reacts with the water in alkali lye
HCl is generated, its chemical equation is as follows：
TiCl4+3H2O=4HCl+H2TiO3；
Acid-base neutralization reaction further occurs for the NaOH reacted in the HCl and alkali lye produced, and its chemical equation is as follows：
NaOH+HCl=NaCl+H2O；
TiCl4Tail gas carries out standard discharge after the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks.
It is preferred that, the TiCl4Tail gas absorption method also includes：
TiCl4Tail gas is passed through in one-level alkali liquid tank after base extraction, by titanium tetrachloride gases sensor to TiCl4Gas
Bulk concentration is detected；
If titanium tetrachloride gases sensor detects TiCl4Gas is present, then returns tail gas again by two grades of tail gas branch pipes
Return to one-level alkali liquid tank and carry out base extraction；
It is passed through again in two grades of alkali liquid tanks after processing is up to standard, the tail gas through base extraction in two grades of alkali liquid tanks passes through hydrogen chloride gas
Body sensor is detected to produced HCl gas concentrations；
If HCl gas concentrations concentration is greater than or equal to 1.9mg/m3, then HCl gases are returned again by tail gas exhaust outlet
Return to two grades of alkali liquid tanks and carry out base extraction；And
If HCl gas concentrations concentration is less than 1.9mg/m3, then standard discharge is handled into air.
The invention has the advantages that：1st, realize to TiCl4The controllable classification alkali lye neutralisation treatment of tail gas and effectively
Monitoring, has reached to TiCl4Effective absorption of tail gas, it is to avoid direct to discharge the problem of environmental pollution caused, alleviates enterprise
Environmental protection pressure, it is ensured that the normal production of enterprise；2nd, avoid tail gas and directly discharge the acid gas of generation to peripheral equipment, the corruption of structure
Erosion, eliminates potential safety hazard, reduces economic loss；3rd, operating environment is purified, it is ensured that operating personnel's is healthy.
Brief description of the drawings
Fig. 1 is the TiCl of the embodiment of the present invention 14The structural representation of device for absorbing tail gas.
Fig. 2 is the TiCl of the embodiment of the present invention 24The structural representation of device for absorbing tail gas.
Fig. 3 is the TiCl of the embodiment of the present invention 24Device for absorbing tail gas control module connection diagram.
Fig. 4 is the TiCl of the embodiment of the present invention 34The structural representation of device for absorbing tail gas.
Fig. 5 is the TiCl of the embodiment of the present invention 34Device for absorbing tail gas control module connection diagram.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
As shown in figure 1, a kind of TiCl proposed by the present invention4Device for absorbing tail gas, including storage tank 1, surge tank 2, one-level
Alkali lye is respectively arranged with alkali liquid tank 3 and two grades of alkali liquid tanks 4, one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4, alkali lye is concentration about 20%
NaOH solution, is connected between storage tank 1 and surge tank 2 by bleeder pipe 7, and surge tank 2 negative pressure can occur in storage tank 1
When, prevent that alkali lye suck-back from entering in storage tank 1 and occurring the production accident of influence material quality, surge tank 2 and one-level alkali liquid tank 3 it
Between be connected by one-level offgas duct 9, the inlet end of one-level offgas duct 9 is in the surge tank 2, and the outlet side of one-level offgas duct 9 is located at
In one-level alkali liquid tank 3 below alkali lye liquid level, it is connected between one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4 by two grades of offgas ducts 12,
Two grades of inlet ends of offgas duct 12 are more than alkali lye liquid level in one-level alkali liquid tank 3, and two grades of outlet sides of offgas duct 12 are located at two grades of alkali
In flow container 4 below alkali lye liquid level, two grades of alkali liquid tanks 4 connect exhaust emission tube 17, and the inlet end of exhaust emission tube 17 is located at two grades of alkali
In flow container 4 more than alkali lye liquid level, the outlet side of exhaust emission tube 17 is placed in air, and 1 is also connected with feed pipe 5 on storage tank, buffering
Tank 2, one-level alkali liquid tank 3 and two grades of bottom sidewalls of alkali liquid tank 4 are equipped with discharge gate 31,32 and 33, surge tank 2, one-level alkali liquid tank 3
With observation panel 22,23 and 24 is equipped with two grades of alkali liquid tanks 4, the material of surge tank 2, one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4 is equal
It is to include the anti-corrosion material of fiberglass.
TiCl proposed by the present invention4Device for absorbing tail gas can effectively absorb titanium sponge production enterprise in TiCl4In course of conveying
The TiCl of generation4Tail gas, the invention also provides one kind is based on this TiCl4The TiCl of device for absorbing tail gas4Tail gas absorption method,
Method includes：
The TiCl of liquid in fluid reservoir4Volatilization forms TiCl4Tail gas；
TiCl4It is passed through successively after the buffered tank of tail gas in one-level alkali liquid tank and two grades of alkali liquid tanks；
In the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks, TiCl4Tail gas first reacts with the water in alkali lye
HCl is generated, its chemical equation is as follows：
TiCl4+3H2O=4HCl+H2TiO3；
Acid-base neutralization reaction further occurs for the NaOH reacted in the HCl and alkali lye produced, and its chemical equation is as follows：
NaOH+HCl=NaCl+H2O；
TiCl4Tail gas carries out standard discharge after the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks.
Embodiment 2
As shown in Fig. 2 a kind of TiCl proposed by the present invention4Device for absorbing tail gas, including storage tank 1, surge tank 2, one-level
Alkali lye is respectively arranged with alkali liquid tank 3 and two grades of alkali liquid tanks 4, one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4, alkali lye is concentration about 20%
NaOH solution, is connected between storage tank 1 and surge tank 2 by bleeder pipe 7, and bleeder pipe 7 is provided with vent valve 8, surge tank 2
Provided with pressure sensor 11, when surge tank 2 negative pressure can occur in storage tank 1, prevent alkali lye suck-back from entering in storage tank 1 and going out
The production accident of material quality is now influenceed, is connected between surge tank 2 and one-level alkali liquid tank 3 by one-level offgas duct 9, one-level tail
The inlet end of tracheae 9 is in surge tank 2, and the outlet side of one-level offgas duct 9 is below alkali lye liquid level in one-level alkali liquid tank 3, one-level
Offgas duct 9 is provided with one-level exhaust valve 10, is connected between one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4 by two grades of offgas ducts 12,
Two grades of inlet ends of offgas duct 12 are more than alkali lye liquid level in one-level alkali liquid tank 3, and two grades of outlet sides of offgas duct 12 are located at two grades of alkali
In flow container 4 below alkali lye liquid level, two grades of alkali liquid tanks 4 connect exhaust emission tube 17, and the inlet end of exhaust emission tube 17 is located at two grades of alkali
In flow container 4 more than alkali lye liquid level, the outlet side of exhaust emission tube 17 is placed in air, and exhaust emission tube 17 is provided with hydrogen chloride gas
Sensor 19, tail gas exhaust outlet 20 and tail gas dump valve 18, HCl gas sensor 19 are located at close to two grades of alkali liquid tanks 4 one
Side, tail gas dump valve 18 is located at close to the outlet side side of exhaust emission tube 17, and the inlet end of tail gas exhaust outlet 20 is located at hydrogen chloride
Between gas sensor 19 and tail gas dump valve 18, the outlet side of tail gas exhaust outlet 20 alkali lye liquid level in two grades of alkali liquid tanks 4
Hereinafter, tail gas exhaust outlet 20 is provided with tail gas discharge branch valve 21, tail end branch pipe elastic bag 30 and the protection of tail gas exhaust outlet
Valve 28, tail gas discharge branch valve 21 is located at close to the inlet end side of tail gas exhaust outlet 20, and tail gas exhaust outlet protection valve 28 is located at
The outlet side side of tail gas exhaust outlet 20, tail end branch pipe elastic bag 30 is protected located at tail gas discharge branch valve 21 and tail gas exhaust outlet
Protect between valve 28, provided with tail end branch tube airbag folder 29 outside tail end branch pipe elastic bag 30,1 is also connected with feed pipe 5 on storage tank,
Feed pipe 5 is provided with inlet valve 6, and fluid reservoir 1 needs to open inlet valve 6, surge tank 2, one-level alkali liquid tank 3 and two grades of alkali during charging
The bottom sidewall of flow container 4 is equipped with discharge gate 31,32 and 33, surge tank 2, one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4 and is equipped with sight
Mouth 22,23 and 24 is examined, the material of surge tank 2, one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4 is the anti-corrosion material including fiberglass.
TiCl4Device for absorbing tail gas is additionally provided with control module 34, as shown in figure 3, control module is provided with signal input part 35
With signal output part 36, signal input part 35 is electrically connected with pressure sensor 11 and HCl gas sensor 19, signal output
End 36 and vent valve 8, one-level exhaust valve 10, tail gas dump valve 18, tail gas discharge branch valve 21, tail gas exhaust outlet protection valve 28 and
Tail end branch tube airbag folder 29 is electrically connected.The pressure data for the surge tank that pressure sensor 11 is detected can be transferred to control module 28,
The real-time monitoring to pressure in surge tank 2 is realized, control module 28 can control vent valve 8 and one-level according to pressure data set points
The keying of exhaust valve 10, it is automatic to close vent valve 8 and one-level tail gas if there is negative pressure condition in the deflation course of storage tank 1
Valve 10, prevents alkali lye suck-back accident；Tail gas leads to after the two-stage base extraction of one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4
The HCl real-time gas concentration datas that hydroperoxide gas sensor 19 is gathered are transferred to control module 28, the basis of control module 28
HCl gas concentration setting values (1.9mg/m3) tail gas dump valve 18 and tail gas discharge branch valve 21 are controlled, when real-time HCl gas concentrations
Data are more than 1.9mg/m3When close tail gas dump valve 18, open tail gas discharge branch valve 21, tail gas is collected to tail end branch tubular elastic
Air bag 30, extrudes tail end branch pipe elastic bag 30 by controlling tail end branch tube airbag to press from both sides 29, is protected while opening tail gas exhaust outlet
Shield valve 28 is vented, and tail gas is backed within two grades of alkali liquid tanks 4 and is handled again, when tail end branch pipe elastic bag 30 is extruded to the limit
Tail gas exhaust outlet protection valve 28 is closed during compressive state, makes alkali lye suck-back in air-breathing to prevent tail end branch pipe elastic bag 30,
And expand the air-breathing of tail end branch pipe elastic bag 30 by loosening tail end branch tube airbag folder 29, air-breathing-exhaust process is repeated, only
When real-time HCl gas concentrations data are less than 1.9mg/m3When close tail gas discharge branch valve 21, open tail gas dump valve 18, will be up to standard
Tail gas is discharged in air.
TiCl proposed by the present invention4Device for absorbing tail gas can effectively absorb titanium sponge production enterprise in TiCl4In course of conveying
The TiCl of generation4Tail gas, the invention also provides one kind is based on this TiCl4The TiCl of device for absorbing tail gas4Tail gas absorption method,
Method includes：
The TiCl of liquid in fluid reservoir4Volatilization forms TiCl4Tail gas；
TiCl4It is passed through successively after the buffered tank of tail gas in one-level alkali liquid tank and two grades of alkali liquid tanks；
In the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks, TiCl4Tail gas first reacts with the water in alkali lye
HCl is generated, its chemical equation is as follows：
TiCl4+3H2O=4HCl+H2TiO3；
Acid-base neutralization reaction further occurs for the NaOH reacted in the HCl and alkali lye produced, and its chemical equation is as follows：
NaOH+HCl=NaCl+H2O；
TiCl4Tail gas carries out standard discharge after the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks.
TiCl4Tail gas absorption method also includes：
Tail gas through base extraction in two grades of alkali liquid tanks is entered by HCl gas sensor to produced HCl gas concentrations
Row detection；
If HCl gas concentrations concentration is greater than or equal to 1.9mg/m3, then HCl gases are returned again by tail gas exhaust outlet
Return to two grades of alkali liquid tanks and carry out base extraction；And
If HCl gas concentrations concentration is less than 1.9mg/m3, then standard discharge is handled into air.
By the present apparatus and method, by two-stage base extraction, make titanium sponge production enterprise in TiCl4Produced in course of conveying
Raw TiCl4Tail gas is effectively absorbed, and realizes the monitoring of noxious acidic HCl flue gases in tail gas by control module, will not
Exhaust gas recirculation processing up to standard, it is ensured that the qualified discharge of tail gas.
Embodiment 3
As shown in figure 4, a kind of TiCl proposed by the present invention4Device for absorbing tail gas, including storage tank 1, surge tank 2, one-level
Alkali lye is respectively arranged with alkali liquid tank 3 and two grades of alkali liquid tanks 4, one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4, alkali lye is concentration about 20%
NaOH solution, is connected between storage tank 1 and surge tank 2 by bleeder pipe 7, and bleeder pipe 7 is provided with vent valve 8, surge tank 2
Provided with pressure sensor 11, when surge tank 2 negative pressure can occur in storage tank 1, prevent alkali lye suck-back from entering in storage tank 1 and going out
The production accident of material quality is now influenceed, is connected between surge tank 2 and one-level alkali liquid tank 3 by one-level offgas duct 9, one-level tail
The inlet end of tracheae 9 is in surge tank 2, and the outlet side of one-level offgas duct 9 is below alkali lye liquid level in one-level alkali liquid tank 3, one-level
Offgas duct 9 is provided with one-level exhaust valve 10, is connected between one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4 by two grades of offgas ducts 12,
Two grades of inlet ends of offgas duct 12 are more than alkali lye liquid level in one-level alkali liquid tank 3, and two grades of outlet sides of offgas duct 12 are located at two grades of alkali
In flow container 4 below alkali lye liquid level, two grades of offgas ducts 12 are provided with titanium tetrachloride gases sensor 14, two grades of tail gas branch pipes 15 and two
Level exhaust valve 13, titanium tetrachloride gases sensor 14 is located at close to the side of one-level alkali liquid tank 3, and two grades of exhaust valves 13 are located at close to two
Level alkali liquid tank 4 side, two grades of inlet ends of tail gas branch pipe 15 are located between titanium tetrachloride gases sensor 14 and two grades of exhaust valves 13,
Two grades of outlet sides of tail gas branch pipe 15 are below alkali lye liquid level in one-level alkali liquid tank 3, and two grades of tail gas branch pipes 15 are provided with two grades of tails
Gas branch valve 16, two grades of branch pipe elastic bags 27 and two grades of tail gas branch protection of pipe valves 25, two grades of tail gas branch valves 16 are located at close to two grades
The inlet end side of tail gas branch pipe 15, two grades of tail gas branch protection of pipe valves 25 are located at two grades of outlet side sides of tail gas branch pipe 15, two grades of branch
Tubular elastic air bag 27 is located between two grades of tail gas branch valves 16 and two grades of tail gas branch protection of pipe valves 25, outside two grades of branch pipe elastic bags 27
Portion connects exhaust emission tube 17 provided with two grades of branch tube airbag folders 26, two grades of alkali liquid tanks 4, and the inlet end of exhaust emission tube 17 is located at two grades
In alkali liquid tank 4 more than alkali lye liquid level, the outlet side of exhaust emission tube 17 is placed in air, and exhaust emission tube 17 is provided with hydrogen chloride gas
Body sensor 19, tail gas exhaust outlet 20 and tail gas dump valve 18, HCl gas sensor 19 are located at close to two grades of alkali liquid tanks 4
Side, tail gas dump valve 18 is located at close to the outlet side side of exhaust emission tube 17, and the inlet end of tail gas exhaust outlet 20 is located at chlorination
Between hydrogen body sensor 19 and tail gas dump valve 18, the outlet side of tail gas exhaust outlet 20 alkali lye liquid in two grades of alkali liquid tanks 4
Below face, tail gas exhaust outlet 20 is protected provided with tail gas discharge branch valve 21, tail end branch pipe elastic bag 30 and tail gas exhaust outlet
Valve 28 is protected, tail gas discharge branch valve 21 is located at close to the inlet end side of tail gas exhaust outlet 20, tail gas exhaust outlet 28, valve of protection
In the outlet side side of tail gas exhaust outlet 20, tail end branch pipe elastic bag 30 is located at tail gas discharge branch valve 21 and tail gas exhaust outlet
Protect between valve 28, provided with tail end branch tube airbag folder 29 outside tail end branch pipe elastic bag 30,1 is also connected with feed pipe on storage tank
5, feed pipe 5 is provided with inlet valve 6, and fluid reservoir 1 needs to open inlet valve 6, surge tank 2, one-level alkali liquid tank 3 and two grades during charging
The bottom sidewall of alkali liquid tank 4 is equipped with discharge gate 31,32 and 33, surge tank 2, one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4 and is equipped with
Observation panel 22,23 and 24, the material of surge tank 2, one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4 is the preserving timber including fiberglass
Material.
TiCl4Device for absorbing tail gas is additionally provided with control module 34, as shown in figure 5, control module 34 is provided with signal input part
35 and signal output part 36, signal input part 35 and pressure sensor 11, titanium tetrachloride gases sensor 14 and hydrogen chloride gas
Sensor 19 is electrically connected, signal output part 36 and vent valve 8, one-level exhaust valve 10, two grades of exhaust valves 13, two grades of tail gas branch valves
16th, two grades of tail gas branch protection of pipe valves 25, two grades of branch tube airbag folders 26, tail gas dump valve 18, tail gas discharge branch valve 21, tail gas discharges
Branch protection of pipe valve 28 and tail end branch tube airbag folder 29 are electrically connected.The pressure data for the surge tank that pressure sensor 11 is detected can be transmitted
To control module, the real-time monitoring to pressure in surge tank 2 is realized, control module 28 can be put according to pressure data set points control
The keying of air valve 8 and one-level exhaust valve 10, it is automatic to close vent valve 8 if there is negative pressure condition in storage tank deflation course
With one-level exhaust valve 10, prevent alkali lye suck-back accident；The TiCl4 real-time gas that titanium tetrachloride gases sensor 14 is gathered is dense
Degrees of data is transferred to control module, and control module controls two grades of tails according to the titanium tetrachloride gases sensor concentration detection limit of setting
Air valve 13 and two grades of tail gas branch valves 16, when real-time TiCl4 gas concentrations data are detected more than titanium tetrachloride gases sensor concentration
Two grades of exhaust valves 13 are closed in limited time, two grades of tail gas branch valves 16 are opened, tail gas is collected to two grades of branch pipe elastic bags 27, pass through control
Two grades of branch tube airbag folders 26 extrude two grades of branch pipe elastic bags 27, are vented while opening two grades of tail gas branch protection of pipe valves 25, make tail
Gas backs within two grades of alkali liquid tanks 4 and handled again, is closed when two grades of branch pipe elastic bags 27 are extruded to limited compression state
Two grades of tail gas branch protection of pipe valves 25, make alkali lye suck-back in air-breathing to prevent two grades of branch pipe elastic bags 27, and by loosening two grades
Branch tube airbag folder 26 makes the two grades of air-breathing of branch pipe elastic bag 27 expansions, repeats air-breathing-exhaust process, tail gas backs within one-level
Alkali liquid tank 3 is handled again, only as real-time TiCl4When gas concentration data are less than titanium tetrachloride gases sensor concentration detection limit
Two grades of tail gas branch valves 16 are closed, two grades of exhaust valves 13 are opened, tail gas enters two grades of alkali liquid tanks 4 and carries out base extraction；Tail gas passes through
After the two-stage base extraction of one-level alkali liquid tank 3 and two grades of alkali liquid tanks 4, the HCl gathered by HCl gas sensor 19 is real-time
Gas concentration data transfer is to control module 28, and control module 28 is according to HCl gas concentration setting values (1.9mg/m3) control tail
Gas dump valve 18 and tail gas discharge branch valve 21, when real-time HCl gas concentrations data are more than 1.9mg/m3When close tail gas dump valve
18, tail gas discharge branch valve 21 is opened, tail gas is collected to tail end branch pipe elastic bag 30, squeezed by controlling tail end branch tube airbag to press from both sides 29
Tail end branch pipe elastic bag 30 is pressed, is vented while opening tail gas exhaust outlet protection valve 28, tail gas is backed within two grades of alkali
Flow container 4 is handled again, and tail gas exhaust outlet protection valve is closed when tail end branch pipe elastic bag 30 is extruded to limited compression state
28, make alkali lye suck-back in air-breathing to prevent tail end branch pipe elastic bag 30, and make tail end by loosening tail end branch tube airbag folder 29
The air-breathing of branch pipe elastic bag 30 expands, and repeats air-breathing-exhaust process, only when real-time HCl gas concentrations data are less than 1.9mg/
m3When close tail gas discharge branch valve 21, open tail gas dump valve 18, tail gas up to standard be discharged in air.
TiCl proposed by the present invention4Device for absorbing tail gas can effectively absorb titanium sponge production enterprise in TiCl4In course of conveying
The TiCl of generation4Tail gas, the invention also provides one kind is based on this TiCl4The TiCl of device for absorbing tail gas4Tail gas absorption method,
Method includes：
The TiCl of liquid in fluid reservoir4Volatilization forms TiCl4Tail gas；
TiCl4It is passed through successively after the buffered tank of tail gas in one-level alkali liquid tank and two grades of alkali liquid tanks；
In the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks, TiCl4Tail gas first reacts with the water in alkali lye
HCl is generated, its chemical equation is as follows：
TiCl4+3H2O=4HCl+H2TiO3；
Acid-base neutralization reaction further occurs for the NaOH reacted in the HCl and alkali lye produced, and its chemical equation is as follows：
NaOH+HCl=NaCl+H2O；
TiCl4Tail gas carries out standard discharge after the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks.
TiCl4Tail gas absorption method also includes：
TiCl4Tail gas is passed through in one-level alkali liquid tank after base extraction, by titanium tetrachloride gases sensor to TiCl4Gas
Bulk concentration is detected；
If titanium tetrachloride gases sensor detects TiCl4Gas is present, then returns tail gas again by two grades of tail gas branch pipes
Return to one-level alkali liquid tank and carry out base extraction；
It is passed through again in two grades of alkali liquid tanks after processing is up to standard, the tail gas through base extraction in two grades of alkali liquid tanks passes through hydrogen chloride gas
Body sensor is detected to produced HCl gas concentrations；
If HCl gas concentrations concentration is greater than or equal to 1.9mg/m3, then HCl gases are returned again by tail gas exhaust outlet
Return to two grades of alkali liquid tanks and carry out base extraction；And
If HCl gas concentrations concentration is less than 1.9mg/m3, then standard discharge is handled into air.
Realized by the control process of the present apparatus and device by titanium sponge production enterprise in TiCl4Produced in course of conveying
TiCl4Tail gas is tried one's best and is controllably fully converted to HCl in one-level alkali liquid tank, and the HCl to generation is realized in two grades of alkali liquid tanks
Effective absorption of flue gas, two-stage is monitored and recycled to residing process gases, this hierarchically, targetedly to recycle
Processing, it is ensured that be preferably minimized the waste gas Harmful ingredient content value being finally discharged into air.
Although above with general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. a kind of TiCl4Device for absorbing tail gas, it is characterised in that：The TiCl4Device for absorbing tail gas include storage tank, surge tank,
Alkali lye is respectively arranged with one-level alkali liquid tank and two grades of alkali liquid tanks, the one-level alkali liquid tank and two grades of alkali liquid tanks, the storage tank eases up
Rush between tank and be connected by bleeder pipe, the bleeder pipe is provided with vent valve, the surge tank is provided with pressure sensor, institute
State between surge tank and one-level alkali liquid tank and to be connected by one-level offgas duct, the one-level offgas duct inlet end is located at surge tank
Interior, the one-level offgas duct outlet side is below alkali lye liquid level in one-level alkali liquid tank, and the one-level offgas duct is provided with one-level
Exhaust valve, is connected between the one-level alkali liquid tank and two grades of alkali liquid tanks by two grades of offgas ducts, two grades of offgas duct air inlets
End more than alkali lye liquid level in the one-level alkali liquid tank, two grades of offgas duct outlet sides in two grades of alkali liquid tanks alkali lye liquid level with
Under, two grades of alkali liquid tanks connect exhaust emission tube, exhaust emission tube inlet end alkali lye liquid level in two grades of alkali liquid tanks
More than, the exhaust emission tube outlet side is placed in air, and feed pipe is also connected with the storage tank, and the feed pipe is provided with
Inlet valve.
2. a kind of TiCl according to claim 14Device for absorbing tail gas, it is characterised in that：Two grades of offgas ducts are provided with
Titanium tetrachloride gases sensor, two grades of tail gas branch pipes and two grades of exhaust valves, the titanium tetrachloride gases sensor are located at close to one
Level alkali liquid tank side, two grades of exhaust valves are located at close to two grades of alkali liquid tank sides, and two grades of tail gas branch pipe inlet end is located at
Between titanium tetrachloride gases sensor and two grades of exhaust valves, two grades of tail gas branch pipes outlet side is located at alkali lye in one-level alkali liquid tank
Below liquid level, two grades of tail gas branch pipes are protected provided with two grades of tail gas branch valves, two grades of branch pipe elastic bags and two grades of tail gas branch pipes
Valve is protected, two grades of tail gas branch valve is located at close to two grades of tail gas branch pipe inlet end sides, two grades of tail gas branch protection of pipe valve position
In two grades of tail gas branch pipe outlet sides side, two grades of branch pipe elastic bags are protected located at two grades of tail gas branch valves and two grades of tail gas branch pipes
Protect between valve, provided with two grades of branch tube airbag folders outside two grades of branch pipe elastic bags.
3. a kind of TiCl according to claim 14Device for absorbing tail gas, it is characterised in that：The exhaust emission tube is provided with
HCl gas sensor, tail gas exhaust outlet and tail gas dump valve, the HCl gas sensor are located at close to two grades of alkali
Flow container side, the tail gas dump valve is located at close to exhaust emission tube outlet side side, and the tail gas exhaust outlet inlet end is set
Between HCl gas sensor and tail gas dump valve, tail gas exhaust outlet outlet side alkali lye in two grades of alkali liquid tanks
Below liquid level, the tail gas exhaust outlet is protected provided with tail gas discharge branch valve, tail end branch pipe elastic bag and tail gas exhaust outlet
Valve is protected, the tail gas discharge branch valve is located at close to tail gas exhaust outlet inlet end side, the tail gas exhaust outlet protection valve position
In tail gas exhaust outlet outlet side side, the tail end branch pipe elastic bag discharges branch valve located at tail gas and tail gas exhaust outlet is protected
Protect between valve, provided with tail end branch tube airbag folder outside the tail end branch pipe elastic bag.
4. a kind of TiCl according to claim 14Device for absorbing tail gas, it is characterised in that：The TiCl4Tail gas absorption is filled
Put and be additionally provided with control module, the control module is provided with signal input part and signal output part, the signal input part and pressure
Sensor, titanium tetrachloride gases sensor and HCl gas sensor electrical connection, the signal output part and vent valve, one-level
Exhaust valve, two grades of exhaust valves, two grades of tail gas branch valves, two grades of tail gas branch protection of pipe valves, two grades of branch tube airbag folders, tail gas dump valve,
Tail gas discharge branch valve, tail gas exhaust outlet protection valve and the folder electrical connection of tail end branch tube airbag.
5. a kind of TiCl according to claim 14Device for absorbing tail gas, it is characterised in that：The surge tank, one-level alkali lye
Tank and two grades of alkali liquid tank bottom sidewalls are equipped with discharge gate.
6. a kind of TiCl according to claim 14Device for absorbing tail gas, it is characterised in that：The surge tank, one-level alkali lye
Observation panel is equipped with tank and two grades of alkali liquid tanks.
7. a kind of TiCl according to claim 14Device for absorbing tail gas, it is characterised in that：The surge tank, one-level alkali lye
The material of tank and two grades of alkali liquid tanks is the anti-corrosion material including fiberglass.
8. a kind of TiCl according to claim 14Device for absorbing tail gas, it is characterised in that：The alkali lye is concentration about 20%
NaOH solution.
9. based on a kind of TiCl described in claim 1-84The TiCl of device for absorbing tail gas4Tail gas absorption method, its feature exists
In：The TiCl4Tail gas absorption method includes：
The TiCl of liquid in fluid reservoir4Volatilization forms TiCl4Tail gas；
TiCl4It is passed through successively after the buffered tank of tail gas in one-level alkali liquid tank and two grades of alkali liquid tanks；
In the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks, TiCl4Tail gas is first generated with the water reaction in alkali lye
HCl, its chemical equation is as follows：
TiCl4+3H2O=4HCl+H2TiO3；
Acid-base neutralization reaction further occurs for the NaOH reacted in the HCl and alkali lye produced, and its chemical equation is as follows：
NaOH+HCl=NaCl+H2O；
TiCl4Tail gas carries out standard discharge after the two-stage base extraction of one-level alkali liquid tank and two grades of alkali liquid tanks.
10. TiCl according to claim 94Tail gas absorption method, it is characterised in that：The TiCl4Tail gas absorption method is also
Including：
TiCl4Tail gas is passed through in one-level alkali liquid tank after base extraction, by titanium tetrachloride gases sensor to TiCl4Gas is dense
Degree is detected；
If titanium tetrachloride gases sensor detects TiCl4Gas is present, then tail gas is backed within into one by two grades of tail gas branch pipes
Level alkali liquid tank carries out base extraction；
It is passed through again in two grades of alkali liquid tanks after processing is up to standard, the tail gas through base extraction in two grades of alkali liquid tanks is passed by hydrogen chloride gas
Sensor is detected to produced HCl gas concentrations；
If HCl gas concentrations concentration is greater than or equal to 1.9mg/m3, then HCl gases are backed within by tail gas exhaust outlet
Two grades of alkali liquid tanks carry out base extraction；And
If HCl gas concentrations concentration is less than 1.9mg/m3, then standard discharge is handled into air.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709092.4A CN107243237B (en) | 2017-08-17 | 2017-08-17 | TiCl4Tail gas absorption device and absorption method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709092.4A CN107243237B (en) | 2017-08-17 | 2017-08-17 | TiCl4Tail gas absorption device and absorption method thereof |
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| CN107243237B CN107243237B (en) | 2020-05-01 |
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|---|---|
| CN107243237B (en) | 2020-05-01 |
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