CN208980326U - A kind of HCl recovery device - Google Patents
A kind of HCl recovery device Download PDFInfo
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- CN208980326U CN208980326U CN201821588026.2U CN201821588026U CN208980326U CN 208980326 U CN208980326 U CN 208980326U CN 201821588026 U CN201821588026 U CN 201821588026U CN 208980326 U CN208980326 U CN 208980326U
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Abstract
The utility model relates to the recovery processing fields of the tail gas containing chlorine, disclose a kind of HCl recovery device, comprising: spray absorber (1), first order absorption kettle (2), hydrochloric acid tank (4), parsing absorption tower (15) and the first absorption tower (16)；The tower top outlet of spray absorber (1) is connected to the gas access of first order absorption kettle (2)；The liquid-phase outlet of first order absorption kettle (2) is connected to the liquid phase entrance of hydrochloric acid tank (4), spray absorber (1) is provided at least two-stage shower deck tray (5), at least one level shower deck tray (5) can rotate, the liquid-phase outlet of hydrochloric acid tank (4) is connected to the liquid phase entrance of parsing absorption tower (15), the first absorption tower (16) respectively, and the gas vent of parsing absorption tower (15) is connected to the gas access of the first absorption tower (16).When HCl recovery device processing tail gas containing chlorine provided by the utility model, it can recycle to obtain concentrated hydrochloric acid, reduce the dust content and chloride content of the tail gas containing chlorine.
Description
Technical field
The utility model relates to the recovery processing fields of the tail gas containing chlorine, and in particular to a kind of HCl recovery device.
Background technique
Currently, the processing to the tail gas containing chlorine mostly uses alkaline sewage to carry out tail gas absorption containing chlorine, although the processing method energy
Enough meet the requirement of tail gas qualified discharge, but absorbing liquid is worth direct outlet without reuse, and it is useless to generate intractable high chlorine saliferous
Water, as country is to the increasingly strict of environmental requirement, externally discharged waste water total salt content index is gradually reduced, and high chlorine brine waste was both given
Subsequent sewage-treatment plant increases burden, and improves the difficulty of sewage qualified discharge；Absorbing liquid outlet leads to trench simultaneously
Hydrochloric acid peculiar smell is denseer, is unfavorable for environment and occupational health protection.
CN102198361A is related to a kind of hydrogen chloride tail gas recyclable device, has at least one HCl recovery tower and absorbing liquid
Circulator, the lower part of HCl recovery tower offer inlet exhaust gas, and the upper end of HCl recovery tower offers offgas outlet, described
The second level spray equipment of spray-absorption liquid is equipped in each HCl recovery tower, the second level spray equipment includes dividing on two
The sprayer set, each sprayer are respectively arranged below with packing layer, and the lower part of HCl recovery tower has recycling second level spray equipment
The circulation liquid case of the absorbing liquid of ejection, circulation liquid case and second level spray equipment are by absorbing liquid circulating device pipeline connection.
The HCl recovery tower of the hydrogen chloride tail gas recyclable device of CN102198361A has second level spray equipment, absorbs in recycling tail gas
Hydrogen chloride effect is more preferable, obtains the hydrochloric acid product of utility value, which realizes electrified control, high degree of automation, fortune
Row expense greatly lowers than original hydrogen chloride tail gas treating column.
CN102285641A is related to a kind of recycling process of waste hydrochloric acid, it is characterised in that: after waste hydrochloric acid is by preheating, with preparation
The good calcium chloride solution as catalyst is sufficiently mixed, and into hydrochloric acid desorber, is made in the reboiler of hydrochloric acid desorption tower bottom
Collected after subcooler and demister with the hydrogen chloride gas of lower precipitation, precipitation, dissolved with a small amount of hydrogen chloride water again
Hydrochloric acid desorber is back to continue to parse, and the calcium chloride solution as catalyst is then passed through flash distillation diversion cans and is prepared benefit again
With.The waste for avoiding hydrogen chloride, also reduces cost of sewage disposal.
CN202193614U discloses a kind of HCl recovery concentration technology equipment, comprising: raw material acid head tank, autoclave evaporation
Device, dehydration rectifying column neutralize device, concentrate evaporator, de- analysis kettle and hydrochloric acid absorption tower, the raw material acid head tank connection autoclave
Evaporator, the autoclave evaporator are separately connected dehydration rectifying column and neutralize device, the dehydration rectifying column connection concentrate evaporation
Device, the de- analysis kettle of concentrate evaporator connection, the concentrate evaporator and de- analysis kettle are connect with hydrochloric acid absorption tower.By above-mentioned
The HCl recovery concentration technology equipment performance of mode, the utility model is advanced, and stable and safe in operation, small investment, low energy consumption, production
Treatment effeciency is high, and production process is continuously reliable, can evaporate to the hydrochloric Waste water concentrating of low concentration, the concentration of hydrochloric acid after evaporation can
Up to 25%-35%, chemical industry can be directly used for.
Waste hydrochloric acid technique utilizes in various industries and has obtained widely utilizing very much, but the main pollution in tail gas containing chlorine
Ingredient hydrogen chloride gas cannot obtain effective recycling and cost recovery is excessively high, and recyclable device complexity cost of investment is high, cause
The waste of resource, this is current urgent problem.
Utility model content
The purpose of this utility model is to overcome the complexity of device for recovering tail gas containing chlorine of the existing technology and investments
Defect problem at high cost provides a kind of HCl recovery device.Device provided by the utility model can be used in processing catalysis and split
When changing roasting and spray-drying process generation tail gas containing chlorine in catalyst preparation process, the dust of the tail gas containing chlorine can be effectively reduced
Content and chloride content, and the concentration of obtained recycling hydrochloric acid can reach 30 weight % or more, can be used in industrial application, mention
The high utilization rate and value of recycling hydrochloric acid.
To achieve the goals above, the utility model provides a kind of HCl recovery device, which includes: spray-absorption
Tower, first order absorption kettle, hydrochloric acid tank, parsing absorption tower and the first absorption tower；The tower top outlet and the first order of spray absorber
The gas access of absorption kettle is connected to, and the tower bottom outlet of spray absorber is connected to the liquid inlet of first order absorption kettle；The first order
The liquid-phase outlet of absorption kettle is connected to the liquid phase entrance of hydrochloric acid tank, wherein the spray absorber is provided at least two-stage spray
Tower tray is drenched, and at least one level shower deck tray can rotate；
The liquid-phase outlet of hydrochloric acid tank is connected to the liquid phase entrance on parsing absorption tower, the first absorption tower respectively, hydrochloric acid tank
At least partly low-concentration hcl of liquid-phase outlet parsing absorption tower in parsed, parse absorption tower gas vent obtain compared with
High salt concentration acid gas；
The gas vent on parsing absorption tower is connected to the gas access on the first absorption tower, and the liquid-phase outlet of hydrochloric acid tank is extremely
Small part low-concentration hcl absorbs the higher concentration HCl gas of the gas vent on parsing absorption tower in the first absorption tower, the
The liquid-phase outlet on one absorption tower obtains concentrated hydrochloric acid.
Preferably, the spray absorber is provided with 4-6 grades of shower deck tray.
Preferably, 1.5-2m is spaced between adjacent shower deck tray.
Preferably, the diameter of every level-one shower deck tray is each independently 2-3.5m.
Preferably, the height of the spray absorber is 12-20m, internal diameter 3-5m.
Preferably, it is provided at least four nozzle each independently on every level-one shower deck tray.
Preferably, it is provided with 4-8 nozzle each independently on every level-one shower deck tray.
Preferably, multiple holes are provided on the helical element of the spiral nozzle, multiple holes are uniform on helical element
Distribution.
Preferably, the percent opening on helical element is 10-20%.
Preferably, device further include: second level absorption kettle, tower bottom outlet and the second level absorption kettle of spray absorber
Liquid inlet connection, the liquid-phase outlet of second level absorption kettle are connected to the liquid phase entrance of hydrochloric acid tank.
Preferably, device further include: heating unit, the heating unit is for heating hydrochloric acid tank；Hydrochloric acid
The gaseous phase outlet of storage tank is connected to the gas phase entrance of first order absorption kettle.
Preferably, device further include: second absorption tower, the liquid-phase outlet of hydrochloric acid tank and the liquid phase of second absorption tower enter
Mouth connection；The gas vent on parsing absorption tower is connected to the gas access of second absorption tower, and the liquid-phase outlet of hydrochloric acid tank is extremely
Small part low-concentration hcl absorbs the higher concentration HCl gas of the gas vent on parsing absorption tower in second absorption tower, the
The liquid-phase outlet on two absorption towers obtains concentrated hydrochloric acid.
Preferably, the tower top outlet on the first absorption tower is connected to the gas access on the first absorption tower, the tower on the first absorption tower
The gas that ejection mouth obtains is recycled in the first absorption tower to be absorbed again；The tower top outlet of second absorption tower and second absorbs
The gas access of tower is connected to, and the gas that the tower top outlet of second absorption tower obtains is recycled in second absorption tower to be inhaled again
It receives.
Device provided by the utility model, which can be used in handling, to be roasted and does by spraying in catalytic cracking catalyst preparation process
Dry process generates tail gas containing chlorine, can be effectively reduced the dust content and chloride content of the tail gas containing chlorine, and obtained recycling hydrochloric acid
Concentration can reach 30 weight % or more, can be used in industrial application, improve recycling hydrochloric acid utilization rate and value.
Detailed description of the invention
Fig. 1 is a kind of HCl recovery device of specific embodiment provided by the utility model；
Fig. 2 is a kind of nozzle of specific embodiment provided by the utility model；
Fig. 3 is a kind of shower deck tray transverse interface schematic diagram of specific embodiment provided by the utility model.
Description of symbols
The second level 1- spray absorber 2- first order absorption kettle 3- absorption kettle
4- hydrochloric acid tank 5- shower deck tray 51- nozzle
The hole 511- helical element 512- 52- water feed inlet
6- heating unit 7- water storage tank 8- first is pumped
9- second pumps 10- third and pumps the first air-introduced machine of 11-
The second air-introduced machine of 12- 13- the 4th pumps 14- third air-introduced machine
15- parses the first absorption tower absorption tower 16- 17- second absorption tower
Broken boiling the 4th air-introduced machine of agent storage tank 19- of 18-
Specific embodiment
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " tower top, tower bottom, top,
Bottom, up and down " typically refer to reference to tower top shown in the drawings, tower bottom, top, bottom, up and down.
In the present invention, " first, second, third, fourth " used is intended merely to distinguish and use in different location
Same equipment or operation, not to equipment or operation play restriction effect.
The utility model provides a kind of HCl recovery device, as shown in Figure 1, the device includes: spray absorber 1, first
Grade absorption kettle 2, hydrochloric acid tank 4, parsing absorption tower 15 and the first absorption tower 16；The tower top outlet and the first order of spray absorber 1
The gas access of absorption kettle 2 is connected to, and the tower bottom outlet of spray absorber 1 is connected to the liquid inlet of first order absorption kettle 2；First
The liquid-phase outlet of grade absorption kettle 2 is connected to the liquid phase entrance of hydrochloric acid tank 4, wherein the spray absorber 1 is provided at least two
Grade shower deck tray 5, and at least one level shower deck tray 5 can rotate；
The liquid-phase outlet of hydrochloric acid tank 4 is connected to the liquid phase entrance on parsing absorption tower 15, the first absorption tower 16 respectively, hydrochloric acid
At least partly low-concentration hcl of 4 liquid-phase outlet of storage tank is parsed in parsing absorption tower 15, parses the gas on absorption tower 15
Outlet obtains higher concentration HCl gas；
The gas vent on parsing absorption tower 15 is connected to the gas access on the first absorption tower 16, and the liquid phase of hydrochloric acid tank 4 goes out
At least partly low-concentration hcl of mouth absorbs the higher concentration salt of the gas vent on parsing absorption tower 15 in the first absorption tower 16
The liquid-phase outlet of acid gas, the first absorption tower 16 obtains concentrated hydrochloric acid.
In the present invention, to the low-concentration hcl, the higher concentration HCl gas and the concentrated hydrochloric acid
Concentration there is no particular limitation, be only intended to distinguish the obtained product of different units, three's concentration is only in contrast, described
The concentration of concentrated hydrochloric acid is greater than low-concentration hcl.
Preferably, the concentration of the low-concentration hcl is not more than 20 weight %.
Preferably, the higher concentration HCl gas is the HCl gas of purity 90-98%.
Preferably, the concentration of the concentrated hydrochloric acid is not less than 30 weight %.
According to device provided by the utility model, tail gas containing chlorine carries out spray-absorption, spray-absorption in spray absorber 1
1 tower bottom of tower is absorbed liquid, and 1 tower top of spray absorber obtains tail gas, and absorbing liquid passes through the tower bottom outlet of spray absorber 1 and the
The liquid inlet of first order absorption kettle 2 is sent into first order absorption kettle 2, and 1 tower top of spray absorber obtains tail gas and passes through spray-absorption
The tower top outlet of tower 1 and the gas access of first order absorption kettle 2 are sent into first order absorption kettle 2, and tail gas is in first order absorption kettle 2
In be further absorbed by liquid absorption.
According to device provided by the utility model, at least one level shower deck tray 5 can rotate, preferably every level-one shower deck tray
5 can rotate, and using this kind of preferred embodiment, shower water can be made to come into full contact with tail gas containing chlorine, avoided containing not
Processed tail gas, which is expelled directly out, causes environmental pollution.
According to device provided by the utility model, it is preferable that the spray absorber 1 is provided with 4-6 grades of shower deck tray 5.
Every level-one shower deck tray 5 may be the same or different, and there is no particular limitation to this for the utility model, preferably identical.
A kind of specific embodiment according to the present utility model, at least two-stage shower deck tray 5 are flat along about 1 spray absorber
Row setting.Preferably, 1.5-2m is spaced between adjacent shower deck tray 5.
There is no particular limitation for height of the utility model to the spray absorber 1, and those skilled in the art can root
It is suitably selected according to being spaced between the adjacent shower deck tray 5 of the sum of series of shower deck tray 5, for example, can be 12-20m.
There is no particular limitation for internal diameter of the utility model to the spray absorber 1, it is preferable that spray absorber 1
Internal diameter is greater than the diameter of shower deck tray 5, for example, the internal diameter of spray absorber 1 is 3-5m.
A kind of preferred embodiment according to the present utility model, be provided on every level-one shower deck tray 5 each independently to
Few 4 nozzles 51, are further preferably provided with 4-8 nozzle 51.A kind of specific embodiment according to the present utility model, nozzle
51 are uniformly distributed on shower deck tray 5.
A kind of preferred embodiment according to the present utility model, the nozzle 51 is spiral nozzle, using this kind of spiral
After the atomization of formula nozzle water droplet, in the spiral wire body continuously to become smaller, enables to droplet size distribution range wider and connect with tail gas containing chlorine
It is more preferable to touch effect.
It is further preferred that as shown in Fig. 2, being provided with multiple holes 512 on the helical element 511 of the spiral nozzle
(preferably circular hole).Using this kind of preferred embodiment, sprayed from hole 512 so that a part of water energy is enough, water mist entire in this way
It is wider to change distribution, it is bigger with the contact range of tail gas containing chlorine.
A kind of specific embodiment according to the present utility model, multiple holes 512 are uniformly distributed on helical element 511.
It is further preferred that the percent opening on helical element 511 is 10-20%, most preferably 15-20%.Spire
Percent opening on part 511 is defined as hole 512 in the ratio of 511 outer surface of the gross area and helical element of 511 outer surface of helical element
Value.Using this kind of preferred embodiment, it is more advantageous to the service life for taking into account assimilation effect and spiral nozzle.
A kind of specific embodiment according to the present utility model, the device further include: water storage tank 7, the water storage tank 7 are used for
1 spray-water of spray absorber is provided.Specifically, the first pump 8 is provided on the connecting pipeline of water storage tank 7 and spray absorber 1.
As shown in figure 3, being provided with water feed inlet 52 on the shower deck tray 5, the water in water storage tank 7 passes through water feed inlet 52
Into shower deck tray 5, the spray-absorption of the tail gas containing chlorine is realized.
According to device provided by the utility model, as long as at least one level shower deck tray 5 can rotate, preferably every level-one
Shower deck tray 5 can rotate.The assembly of shower deck tray 5 is not particularly limited in the utility model.For example, the utility model
Shower deck tray 5 is arranged in parallel up and down along the main shaft of spray absorber 1, and the main shaft of spray absorber 1 passes through in shower deck tray 5
The heart, and shower deck tray 5 is fixedly connected with the main shaft of spray absorber 1.The main shaft of spray absorber 1 is connected to the motor to drive spray
The main shaft rotation on absorption tower 1 is drenched, and then shower deck tray 5 is driven to rotate.Water flow passage is provided on shower deck tray 5 to be connected to the water
Feed inlet 52 and nozzle 51, so that the water that water storage tank 7 provides is sent into water flow passage to nozzle 51 by water feed inlet 52.This is practical
Novel to provide a kind of specific assembly method that shower deck tray 5 rotate, the utility model is not limited to this.
A kind of preferred embodiment according to the present utility model, the device further include: second level absorption kettle 3, spray-absorption
The tower bottom outlet of tower 1 is connected to the liquid inlet of second level absorption kettle 3, the liquid-phase outlet and hydrochloric acid tank 4 of second level absorption kettle 3
Liquid phase entrance connection.First order absorption kettle 2 and second level absorption kettle 3 can be used alternatingly.For example, working as first order absorption kettle 2
After liquid storage amount arrival is a certain amount of, the liquid in first order absorption kettle 2 can be passed through to the liquid-phase outlet and salt of first order absorption kettle
The liquid phase entrance of acid storage tank 4 is sent into hydrochloric acid tank 4, and the absorbing liquid that 1 tower bottom of spray absorber obtains can be sent into the second level
Absorption kettle 3.Specifically, the second pump 9 is provided on the connecting pipeline of first order absorption kettle 2 and hydrochloric acid tank 4；Second level absorption kettle
3 and hydrochloric acid tank 4 connecting pipeline on be provided with third pump 10.
A kind of preferred embodiment according to the present utility model, the appearance of the first order absorption kettle 2 and second level absorption kettle 3
Product is each independently 10-15m3。
A kind of preferred embodiment according to the present utility model, the device further include: heating unit 6, the heating unit 6
For being heated to hydrochloric acid tank 4.It is dense that the hydrochloric acid collected in hydrochloric acid tank 4 can be improved using this kind of preferred embodiment
Degree, heats hydrochloric acid tank 4, and the gas containing a small amount of volatilization hydrochloric acid and a large amount of water vapours can be obtained at the top of hydrochloric acid tank 4.
Preferably, the gaseous phase outlet of hydrochloric acid tank 4 is connected to the gas phase entrance of first order absorption kettle 2 (is preferably provided on connecting pipeline
First air-introduced machine 11), the gas containing a small amount of volatilization hydrochloric acid and a large amount of water vapours obtained at the top of hydrochloric acid tank 4 passes through hydrochloric acid storage
The gaseous phase outlet of tank 4 is sent into first order absorption kettle 2 and carries out reuptaking utilization.When the device further includes second level absorption kettle 3,
The gaseous phase outlet of hydrochloric acid tank 4 is connected to the gas phase entrance of second level absorption kettle 3, and containing for obtaining at the top of hydrochloric acid tank 4 is a small amount of
The gas of volatilization hydrochloric acid and a large amount of water vapours is sent into first order absorption kettle 2 and/or the second level by the gaseous phase outlet of hydrochloric acid tank 4
Absorption kettle 3 carries out reuptaking utilization.
The heating unit 6 can be various heating units commonly used in the art, for example, it may be being arranged in hydrochloric acid
Collet heating unit outside storage tank 4, is also possible to steam heating unit.
A kind of concrete mode according to the present utility model, the first order absorption kettle 2 and second level absorption kettle 3 are respectively independent
Ground is equipped with offgas outlet after absorption.Tail gas can be independent after the absorption that first order absorption kettle 2 and 3 top of second level absorption kettle obtain
Discharge, is also possible to for tail gas after absorption that first order absorption kettle 2 obtains to be passed through second level absorption kettle 3 that (specifically, the first order is inhaled
Receive and be provided with third air-introduced machine 14 on the connecting pipeline of kettle 2 and second level absorption kettle 3), then by the suction of second level absorption kettle 3
Tail gas outlet drain after receipts.
A kind of specific embodiment according to the present utility model, the tower top outlet and first order absorption kettle 2 of spray absorber 1
Gas access connecting pipeline on be provided with the second air-introduced machine 12；Tower bottom outlet and the first order absorption kettle 2 of spray absorber 1
Liquid inlet connecting pipeline on be provided with the 4th pump 13.
According to device provided by the utility model, at least partly low-concentration hcl in hydrochloric acid tank 4 is parsing absorption tower
It is parsed in 15.Parsing 15 tower top of absorption tower obtains the HCl gas of higher concentration, and parsing 15 tower bottom of absorption tower is recycled
Liquid, recovered liquid certain time (such as 1-2h) discharge.This recovered liquid contains brokenly boiling agent, the aqueous solution of a small amount of HCl, Ke Yitong
It crosses single vaporization and obtains brokenly boiling agent solid, can re-use and be parsed in parsing absorption tower 15.
The HCl gas of higher concentration through parse absorption tower 15 gas vent and the first absorption tower 16 gas access into
Enter the first absorption tower 16.At least partly low-concentration hcl in hydrochloric acid tank is sent into the first absorption tower 16, on the first absorption tower
The HCl gas that higher concentration is further absorbed in 16, the liquid-phase outlet (tower bottom) on the first absorption tower 16 obtain high salt concentration
Acid.
There is no particular limitation to the parsing absorption tower for the utility model, can be various solutions commonly used in the art
Analyse absorption tower.The height on the parsing absorption tower 15 can be 12-20m, and internal diameter can be 3-5m.
A kind of specific embodiment according to the present utility model, the device further include: broken boiling agent storage tank 18, the broken boiling agent
Storage tank 18 breaks boiling agent for providing used in parsing absorption tower 15.The broken boiling agent can be magnesium chloride, calcium chloride, chlorination
Potassium, sodium chloride, strontium chloride etc., preferably magnesium chloride.The dosage of broken boiling agent is the low-concentration hcl weight being sent into parsing absorption tower 15
The 40-60% of amount.Wherein, break boiling agent and low-concentration hcl can analytically absorption tower 15 lower part be sent into.
Parsing absorption tower 15 is proportionally added in broken boiling agent and low-concentration hcl, and parsing absorption tower 15 is heated by outside heat removing
To 70-85 DEG C, parsing 15 tower top of absorption tower isolates the HCl gas of higher concentration.
A kind of preferred embodiment according to the present utility model, the tower top outlet on the first absorption tower 16 and the first absorption tower 16
Gas access connection, the gas that the tower top outlet on the first absorption tower 16 obtains is recycled in the first absorption tower 16 to be inhaled again
It receives.The gas that first absorption tower, 16 tower top absorbs not in time reenters the first absorption tower 16 and carries out double absorption.It inhales not in time
The mode that the gas of receipts reenters the first absorption tower 16 is not particularly limited, can be by being incorporated to the hydrochloric acid of higher concentration
Gas enters the first absorption tower 16, can also enter the first absorption tower 16 by other gas access.
A kind of preferred embodiment according to the present utility model, the device further include: second absorption tower 17, hydrochloric acid tank 4
Liquid-phase outlet be connected to the liquid phase entrance of second absorption tower 17；Parse the gas vent and second absorption tower 17 on absorption tower 15
Gas access connection.First absorption tower 16 and second absorption tower 17 can be used alternatingly.Specifically, the liquid phase of hydrochloric acid tank 4 goes out
At least partly low-concentration hcl of mouth absorbs the higher concentration salt of the gas vent on parsing absorption tower 15 in second absorption tower 17
The liquid-phase outlet of acid gas, second absorption tower 17 obtains concentrated hydrochloric acid.
A kind of preferred embodiment according to the present utility model, the tower top outlet and second absorption tower 17 of second absorption tower 17
Gas access connection, the gas that the tower top outlet of second absorption tower 17 obtains is recycled in second absorption tower 17 to be inhaled again
It receives.The gas that 17 tower top of second absorption tower absorbs not in time reenters second absorption tower 17 and carries out double absorption.It inhales not in time
The mode that the gas of receipts reenters second absorption tower 17 is not particularly limited, can be by being incorporated to the hydrochloric acid of higher concentration
Gas enters second absorption tower 17, can also enter second absorption tower 17 by other gas access.
A kind of preferred embodiment according to the present utility model, the height on first absorption tower 16 and second absorption tower 17
It is each independently 12-20m, internal diameter is each independently 3-5m.
A kind of specific embodiment according to the present utility model parses gas vent and first absorption tower on absorption tower 15
16, the 4th air-introduced machine 19 is provided on the connecting pipeline between the gas access of second absorption tower 17.
The utility model will be described in detail by embodiment below.
HCl content is surveyed by the measurement of hydrogen chloride, the chromatography of ions in HJ 549-2009 air and wasteair in gas
?；The sampling side that dust content passes through particulate matter measurement and gaseous pollutant in GB/T 16157-1996 Concentration in Fixed Pollutants Source
Method measures.
Embodiment 1
As shown in Figure 1, obtained (the HCl of tail gas containing chlorine will be roasted and be spray-dried in catalytic cracking catalyst preparation process
Content 19460mg/m3, dust content 332mg/m3) be passed through in spray absorber 1 from lower part, spray absorber 1 is 15m high, and tower is straight
Diameter (internal diameter) 5m, spray absorber 1 are provided with 4 grades of shower deck tray 5, and shower deck tray 5 from tower top, successively place downward by installation, spray
5 diameter 3m of tower tray, and 2m is spaced between adjacent shower deck tray 5.Every level-one shower deck tray 5 is able to carry out rotation, and rotation speed is
30r/min.As shown in figure 3, being provided with 4 equally distributed nozzles 51 (spiral nozzle) on shower deck tray 5, and it is provided with water
Feed inlet 52.As shown in Fig. 2, hole 512 is provided on the helical element 511 of spiral nozzle, the percent opening on helical element 511
(hole 512 is in gross area of 511 outer surface of helical element and the ratio of 511 outer surface of helical element) is 15%.
The multi-stage spray tower tray 5 of spray absorber 1 is connected to water storage tank 7, and the spray-water of shower deck tray 5 is by water storage tank 7
It provides, is provided with the first pump 8 on the connecting pipeline of multi-stage spray tower tray 5 and water storage tank 7.Relative to often leading in spray absorber 1
Enter 1m3Tail gas containing chlorine, the water being passed through in every level-one shower deck tray 5 are 7L.
Tail gas containing chlorine is absorbed by 4 grades of shower waters, is absorbed liquid from 1 tower bottom of spray absorber, and the absorbing liquid passes through
4th pump 13 is introduced into first order absorption kettle 2, and 1 tower top of spray absorber obtains tail gas, by the second air-introduced machine 12 from the first order
2 top of absorption kettle introduces, and absorbs to the chlorine in the tail gas, is 13 weights to the content of hydrochloric acid in first order absorption kettle 2
When measuring %, the liquid stored in first order absorption kettle 2 is sent into hydrochloric acid tank 4 by the second pump 9, at this time 1 tower of spray absorber
The absorbing liquid that bottom obtains is sent into second level absorption kettle 3 by the 4th pump 13, through the second air-introduced machine 12 from second level absorption kettle 3
Portion introduces, and absorbs to the chlorine in the tail gas, when the content of hydrochloric acid in second level absorption kettle 3 is 13 weight %, by the
The liquid stored in second level absorption kettle 3 is sent into hydrochloric acid tank 4 by third pump 10；First order absorption kettle 2 and second level absorption kettle 3
It is used alternatingly, the volume of first order absorption kettle 2 and second level absorption kettle 3 is 15m3。
Hydrochloric acid tank 4 is heated by heating unit 6 (steam heating unit), heating temperature is to 85 DEG C, when heating
Between be 2h, improve concentration of hydrochloric acid to 19 weight %.
Gas containing a small amount of volatilization HCl gas and a large amount of water vapours passes through the first air-introduced machine 11 from 4 top of hydrochloric acid tank
It introduces first order absorption kettle 2 and second level absorption kettle 3 carries out reuptaking utilization.The tail gas obtained at the top of first order absorption kettle 2
It is introduced into second level absorption kettle 3 by third air-introduced machine 14.After testing, HCl in the tail gas obtained at the top of second level absorption kettle 3
Content is 4mg/m3, dust content 25mg/m3, reach the Shandong Province DB37/2375-2013 industrial furnace Air Pollutant Emission mark
Quasi- requirement.99% HCl is recovered in tail gas containing chlorine.
Low-concentration hcl (19 weights in broken boiling agent (anhydrous magnesium chloride) and hydrochloric acid tank 4 that broken boiling agent storage tank 18 is provided
Amount %) it is passed through in parsing absorption tower 15 according to mass ratio 0.4.It is 15m high to parse absorption tower 15, tower diameter (internal diameter) 5m, parsing is inhaled
It receives tower 15 and is heated to 80 DEG C by outside heat removing.The HCl gas that purity is greater than 95% is isolated on parsing 15 top of absorption tower, described
HCl gas introduces the lower part on the first absorption tower 16 and second absorption tower 17, the first absorption tower 16 by the 4th air-introduced machine 19 respectively
It is 15m high with second absorption tower 17, tower diameter (internal diameter) 5m.Low-concentration hcl in hydrochloric acid tank 4 is from the first absorption tower 16 and
The top on two absorption towers 17 enters, and absorbs to the HCl gas, the bottom of the first absorption tower 16 and second absorption tower 17 obtains
To concentrated hydrochloric acid, concentration is 30.5 weight %.
The unabsorbed gas in top of first absorption tower 16 and second absorption tower 17 is reintroduced back to the first absorption tower 16 respectively
With the middle and lower part of second absorption tower 17.The every 1h of recovered liquid for parsing 15 bottom of absorption tower is discharged 1 time, can be to this partially recycled liquid
It is recycled.
Embodiment 2
It is carried out according to embodiment 1, unlike, spray absorber 1 is 15m high, tower diameter (internal diameter) 5m, spray absorber 1
5 grades of shower deck tray 5 are provided with, shower deck tray 5 from tower top successively place downward by installation, 5 diameter 3m of shower deck tray, and adjacent spray column
1.8m is spaced between disk 5.Every level-one shower deck tray 5 is able to carry out rotation, rotation speed 35r/min.It is arranged on shower deck tray 5
There are 6 equally distributed nozzles 51 (spiral nozzle), and is provided with water feed inlet 52.As shown in Fig. 2, the spiral shell of spiral nozzle
It is provided with hole 512 on rotation component 511, the percent opening (gross area of the hole 512 in 511 outer surface of helical element on helical element 511
With the ratio of 511 outer surface of helical element) it is 18%.Relative to being often passed through 1m in spray absorber 13Tail gas containing chlorine is passed through every
Water in level-one shower deck tray 5 is 5L.
After testing, HCl content is 4.3mg/m in the tail gas obtained at the top of second level absorption kettle 33, dust content
26.2mg/m3, reach the requirement of the Shandong Province DB37/2375-2013 industrial furnace atmosphere pollutants emission standards.In tail gas containing chlorine
99% HCl is recovered.
The concentration of low-concentration hcl in hydrochloric acid tank 4 is 18.6 weight %.First absorption tower 16 and second absorption tower 17
Bottom obtain concentrated hydrochloric acid concentration be 30.6 weight %.
Embodiment 3
It is carried out according to embodiment 1, unlike, spray absorber 1 is 15m high, tower diameter (internal diameter) 5m, spray absorber 1
6 grades of shower deck tray 5 are provided with, shower deck tray 5 from tower top successively place downward by installation, 5 diameter 3m of shower deck tray, and adjacent spray column
1.5m is spaced between disk 5.Every level-one shower deck tray 5 is able to carry out rotation, rotation speed 25/min.It is arranged on shower deck tray 5
There are 5 equally distributed nozzles 51 (spiral nozzle), and is provided with water feed inlet 52.As shown in Fig. 2, the spiral shell of spiral nozzle
It is provided with hole 512 on rotation component 511, the percent opening (gross area of the hole 512 in 511 outer surface of helical element on helical element 511
With the ratio of 511 outer surface of helical element) it is 20%.Relative to being often passed through 1m in spray absorber 13Tail gas containing chlorine is passed through every
Water in level-one shower deck tray 5 is 6L.
After testing, HCl content is 3.7mg/m in the tail gas obtained at the top of second level absorption kettle 33, dust content
22.5mg/m3, reach the requirement of the Shandong Province DB37/2375-2013 industrial furnace atmosphere pollutants emission standards.In tail gas containing chlorine
99% HCl is recovered.
The concentration of low-concentration hcl in hydrochloric acid tank 4 is 19.5 weight %.First absorption tower 16 and second absorption tower 17
Bottom obtain concentrated hydrochloric acid concentration be 31.1 weight %.
Embodiment 4
According to the method for embodiment 1, unlike, the percent opening on helical element 511 is 8%.
After testing, HCl content is 44mg/m in the tail gas obtained at the top of second level absorption kettle 33, dust content 61mg/
m3, reach the requirement of the Shandong Province DB37/2375-2013 industrial furnace atmosphere pollutants emission standards.99% in tail gas containing chlorine
HCl is recovered.
The concentration of low-concentration hcl in hydrochloric acid tank 4 is 18.5 weight %.First absorption tower 16 and second absorption tower 17
Bottom obtain concentrated hydrochloric acid concentration be 30.1 weight %.
Embodiment 5
According to the method for embodiment 1, unlike, hole 512 is not provided on the helical element 511 of spiral nozzle.By
It detects, HCl content is 78mg/m in the tail gas obtained at the top of second level absorption kettle 33, dust content 72mg/m3, reach DB37/
The requirement of the Shandong Province 2375-2013 industrial furnace atmosphere pollutants emission standards.99% HCl is recovered in tail gas containing chlorine.
The concentration of low-concentration hcl in hydrochloric acid tank 4 is 18.1 weight %.First absorption tower 16 and second absorption tower 17
Bottom obtain concentrated hydrochloric acid concentration be 30.0 weight %.
Comparative example 1
According to the method for embodiment 1, unlike, 4 grades of shower deck tray 5 of spray absorber 1 can not rotate.By
It detects, HCl content is 340mg/m in the tail gas obtained at the top of second level absorption kettle 33, dust content 96mg/m3, cannot reach
The requirement of the Shandong Province DB37/2375-2013 industrial furnace atmosphere pollutants emission standards.98% HCl is returned in tail gas containing chlorine
It receives.
The concentration of low-concentration hcl in hydrochloric acid tank 4 is 15.9 weight %.First absorption tower 16 and second absorption tower 17
Bottom obtain concentrated hydrochloric acid concentration be 24.8 weight %.
From the comparison of above-described embodiment and comparative example it is found that can be effectively removed using device provided by the utility model
The concentration of the pollutants such as dust and HCl in tail gas containing chlorine, obtained recycling hydrochloric acid can achieve 30 weight % or more.From implementation
Example 1 and embodiment 4, embodiment 5 comparing result show, when percent opening is lower on helical element 511 or helical element 511 on
When being not provided with hole, although also can be realized effective recycling of HCl, in the tail gas that embodiment 4 and embodiment 5 are discharged, HCl contains
Amount and dust content are higher compared with embodiment 1.From the comparison of embodiment 1 and comparative example 1 it is found that 4 grades when spray absorber 1 spray
When tower tray 5 can not rotate, in the tail gas that comparative example 1 is discharged, HCl content and dust content are higher, cannot reach DB37/
The requirement of the Shandong Province 2375-2013 industrial furnace atmosphere pollutants emission standards, and obtained high salt concentration acid concentration is lower, no
30 weight % can be reached.
Preferred embodiments of the present invention are described in detail above, still, the utility model is not limited to this.At this
In the range of the technology design of utility model, a variety of simple variants can be carried out to the technical solution of the utility model, including each
Technical characteristic is combined with any other suitable method, these simple variants and combination equally should be considered as the utility model
Disclosure of that belongs to the protection scope of the utility model.
Claims (10)
1. a kind of HCl recovery device, which is characterized in that the device includes: spray absorber (1), first order absorption kettle (2), salt
Acid storage tank (4), parsing absorption tower (15) and the first absorption tower (16)；The tower top outlet and the first order of spray absorber (1) absorb
The gas access of kettle (2) is connected to, and the tower bottom outlet of spray absorber (1) is connected to the liquid inlet of first order absorption kettle (2)；The
The liquid-phase outlet of first order absorption kettle (2) is connected to the liquid phase entrance of hydrochloric acid tank (4), wherein spray absorber (1) setting
There is at least two-stage shower deck tray (5), and at least one level shower deck tray (5) can rotate；
The liquid-phase outlet of hydrochloric acid tank (4) is connected to the liquid phase entrance of parsing absorption tower (15), the first absorption tower (16) respectively, salt
At least partly low-concentration hcl of acid storage tank (4) liquid-phase outlet is parsed in parsing absorption tower (15), parses absorption tower
(15) gas vent obtains higher concentration HCl gas；
The gas vent of parsing absorption tower (15) is connected to the gas access of the first absorption tower (16), the liquid phase of hydrochloric acid tank (4)
At least partly low-concentration hcl of outlet absorbs the higher of the gas vent of parsing absorption tower (15) in the first absorption tower (16)
The liquid-phase outlet of concentration HCl gas, the first absorption tower (16) obtains concentrated hydrochloric acid.
2. the apparatus according to claim 1, which is characterized in that the spray absorber (1) is provided with 4-6 grades of shower deck tray
(5)；
1.5-2m is spaced between adjacent shower deck tray (5)；
The diameter of every level-one shower deck tray (5) is each independently 2-3.5m；
The height of the spray absorber (1) is 12-20m, internal diameter 3-5m.
3. the apparatus of claim 2, which is characterized in that be provided with each independently on every level-one shower deck tray (5)
At least four nozzle (51).
4. device according to claim 3, which is characterized in that be provided with each independently on every level-one shower deck tray (5)
4-8 nozzle (51).
5. device according to claim 3 or 4, which is characterized in that the nozzle (51) is spiral nozzle.
6. device according to claim 5, which is characterized in that be arranged on the helical element (511) of the spiral nozzle
Have multiple holes (512), multiple holes (512) are uniformly distributed on helical element (511)；
Percent opening on helical element (511) is 10-20%.
7. device described in any one of -4 according to claim 1, which is characterized in that the device further include: the second level absorbs
The tower bottom outlet of kettle (3), spray absorber (1) is connected to the liquid inlet of second level absorption kettle (3), second level absorption kettle (3)
Liquid-phase outlet be connected to the liquid phase entrance of hydrochloric acid tank (4).
8. device described in any one of -4 according to claim 1, which is characterized in that the device further include: heating unit
(6), the heating unit (6) is for heating hydrochloric acid tank (4)；
The gaseous phase outlet of hydrochloric acid tank (4) is connected to the gas phase entrance of first order absorption kettle (2).
9. device described in any one of -4 according to claim 1, which is characterized in that the device further include: second absorption tower
(17), the liquid-phase outlet of hydrochloric acid tank (4) is connected to the liquid phase entrance of second absorption tower (17)；Parse the gas of absorption tower (15)
Outlet is connected to the gas access of second absorption tower (17), at least partly low-concentration hcl of the liquid-phase outlet of hydrochloric acid tank (4)
In second absorption tower (17), the higher concentration HCl gas of the gas vent of parsing absorption tower (15), second absorption tower are absorbed
(17) liquid-phase outlet obtains concentrated hydrochloric acid.
10. device according to claim 9, which is characterized in that the tower top outlet of the first absorption tower (16) and first absorbs
The gas access of tower (16) is connected to, and the gas that the tower top outlet of the first absorption tower (16) obtains is recycled in the first absorption tower (16)
It is absorbed again；
The tower top outlet of second absorption tower (17) is connected to the gas access of second absorption tower (17), the tower of second absorption tower (17)
The gas that ejection mouth obtains is recycled in second absorption tower (17) to be absorbed again.
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|---|---|---|---|
| CN201821588026.2U CN208980326U (en) | 2018-09-27 | 2018-09-27 | A kind of HCl recovery device |
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|---|---|---|---|
| CN201821588026.2U CN208980326U (en) | 2018-09-27 | 2018-09-27 | A kind of HCl recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111116523A (en) * | 2019-12-30 | 2020-05-08 | 浙江新和成股份有限公司 | System and process for producing α -chloro- α -acetyl-gamma-butyrolactone |
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2018
- 2018-09-27 CN CN201821588026.2U patent/CN208980326U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111116523A (en) * | 2019-12-30 | 2020-05-08 | 浙江新和成股份有限公司 | System and process for producing α -chloro- α -acetyl-gamma-butyrolactone |
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