CN107311848A - One kind bypass oxygenation type formaldehyde preparation system - Google Patents
One kind bypass oxygenation type formaldehyde preparation system Download PDFInfo
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- CN107311848A CN107311848A CN201710564104.9A CN201710564104A CN107311848A CN 107311848 A CN107311848 A CN 107311848A CN 201710564104 A CN201710564104 A CN 201710564104A CN 107311848 A CN107311848 A CN 107311848A
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- type formaldehyde
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/37—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of >C—O—functional groups to >C=O groups
- C07C45/38—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of >C—O—functional groups to >C=O groups being a primary hydroxyl group
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/783—Separation; Purification; Stabilisation; Use of additives by gas-liquid treatment, e.g. by gas-liquid absorption
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- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Oxygenation type formaldehyde preparation system is bypassed the invention discloses one kind, belongs to Formaldehyde Production field.A kind of bypass oxygenation type formaldehyde preparation system of the present invention, the charging aperture of the blender of system is connected with methanol evaporator, heater exhaust gas and vapor filter respectively, the drainage conduit of the blender is connected with filter, and mixed material is delivered to the blast pipe that air heater is connected with oxidator, the drainage conduit of the blender.The present invention is mainly mixed air with methanol gaseous mixture in transfer pipeline, is mutually mixed evenly, and reaction is more abundant, and impurity and soda acid content be low, it is to avoid the risk of explosion of presence.
Description
Technical field
The present invention relates to Formaldehyde Production technical field, oxygenation type formaldehyde preparation system is bypassed more specifically to one kind.
Background technology
At present, China silver method prepares formaldehyde tool and has been subjected to half a century, and huge achievement, formaldehyde are achieved in every respect
Production is developed into the production that becomes more meticulous by extensive style, by professional development, larger warp simply has been put into technique and operation
Always study and how to improve conversion.
Domestic Formaldehyde Production is mainly using two kinds of process routes, traditional handicraft and circulation of tail gas method technique, and traditional handicraft is adopted
Formaldehyde is produced with ternary blender oxidation reaction, circulation of tail gas method technique is to produce formaldehyde using quaternary gas oxidation reaction, instead
Answer absorption mechanism essentially identical, simply the configuration of reaction member apparatus is different.Circulation of tail gas method technique increases exhaust system, uses
Tail gas removes reaction heat instead of part dispensing vapor, can accomplish 50% or so concentration Formaldehyde Production.
Above two preparation method is all that methanol and air are transported into oxidator after wherein mixing is mixed, due to mixing
Body product is larger, and obstructed gas enters orientation difference, can only be mixed in the process of circulation, then be easy to local air amount occur
The problem of higher and higher some other part methanol contents, mix not abundant enough, it is uneven.In this case, it is follow-up
Reaction may also be difficult to fully progress, cause that prepared formaldehyde impurity contained in composite gas content is higher, conversion ratio is relatively low；In addition,
If methanol meets certain proportion with air content, it is easy to explosive event occur.
Chinese patent (CN105294414 A) discloses a kind of Formaldehyde Production system, and it is included in methanol feedstock tank, methanol
Between tank, methanol filter, methanol reboiler, methanol evaporator, quaternary blender, methanol evaporator, air heater, steam mistake
Filter, heater exhaust gas, filter, oxidator, the first absorption tower, second absorption tower, exhaust gas treating device, heater exhaust gas, first
Aldehyde pans；System completes following process：Evaporation, gas process processed, are made the quaternary mixed gas for meeting procedure technology requirement；Oxygen
Chemical industry sequence：Oxidation, the dehydrogenation reaction of methanol are carried out in the presence of catalyst for electrolytic silver, formaldehyde is converted into by methanol and is produced few
The accessory substance of amount；Absorb process：Using water and formalin as absorbent in packed absorber, absorbed through continuous flow upstream and work is made
Industry formalin.
Above-mentioned reaction is the circulation of tail gas method preparation system that is used, but its conversion of quaternary blender to W-response
Rate reaches certain bottleneck, by exploring, and its reason is likely to the uneven influence to W-response of internal mix, therefore,
How the uniformity of gas mixing is preferably improved, and the raising to reaction transformation efficiency is significant.
The content of the invention
1. the invention technical problem to be solved
It is an object of the invention to overcome the shortcomings of that methanol is difficult to be well mixed in a mixer with air in the prior art,
Oxygenation type formaldehyde preparation system is bypassed there is provided one kind, the present invention mainly enters air with methanol gaseous mixture in transfer pipeline
Row mixing, is mutually mixed evenly, reacts more abundant, impurity and soda acid content be low, it is to avoid the risk of explosion existed.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
A kind of bypass oxygenation type formaldehyde preparation system of the present invention, the charging aperture of the blender of system evaporates with methanol respectively
Device, heater exhaust gas are connected with vapor filter, and the drainage conduit of the blender is connected with filter, and mixed material is conveyed
To oxidator, the blast pipe of air heater is connected with the drainage conduit of the blender.
As further improvement of the present invention, angle is between the drainage conduit of the blender and the blast pipe of oxidator
70~82 °, and junction is not less than 1m apart from filter port.
As further improvement of the present invention, the oxidized tail gas of the oxidator is delivered to 1# absorption towers, 2# and inhaled successively
Tower is received, a tail gas part for the 2# absorption towers discharge is delivered to blender after being heated, and another part is filtered by liquid seal trough
Exhaust gas treating device is delivered to after absorption.
As further improvement of the present invention, the liquid seal trough includes tank body and the explosion stack at the top of tank body, should
Control valve is connected with explosion stack, the connection position of explosion stack and tank body is provided with pressure sensor, when pressure sensor detection
When pressure exceedes the limiting value of setting in tank body, control valve is automatically opened up, and is exhausted by explosion stack.
As further improvement of the present invention, buffer is additionally provided with the top of the tank body, the import on the buffer
Pipeline is connected with absorption tower, and tail gas flow velocity is reduced by buffer.
As further improvement of the present invention, the buffer is main to be made up of annular chamber and buffering connecting leg, the ring
Shape chamber upper end is connected with inlet pipeline, and the buffering connecting leg of annular chamber lower end is passed through tank base；Ring lumen diameter is more than inlet tube
Road, the diameter for buffering connecting leg.
As further improvement of the present invention, screen cloth is provided with the annular chamber, it is located at the entrance of buffering connecting leg
Place.
As further improvement of the present invention, screen cloth is provided with the annular chamber, it is located in the middle part of annular chamber, in sieve
Online side is provided with buffering filler.
As further improvement of the present invention, the buffering filler is steel wool.
As further improvement of the present invention, the tank wall is provided with liquid level gauge.
3. beneficial effect
The technical scheme provided using the present invention, compared with prior art, is had the advantages that：
(1) a kind of bypass oxygenation type formaldehyde preparation system of the invention, mixes methanol and air on transfer pipeline
Close, there is bigger disturbance in the duct using both gas shocks, mix more uniform, be conducive to improving the conversion reacted
Rate, and the risk of explosion because of caused by air skewness is avoided, it is safe and reliable.
(2) a kind of bypass oxygenation type formaldehyde preparation system of the invention, controls the drainage conduit of blender and the row of oxidator
In angular range between tracheae, the angular range, there is larger shock vibration each other, both can preferably mix；This
Outside, also limit the distance of its interface distance filter port, it is ensured that gas has enough incorporation times, it is ensured that mixing it is uniform
Property.
(3) a kind of bypass oxygenation type formaldehyde preparation system of the invention, is provided between absorption tower and exhaust gas treating device
Liquid seal trough, and explosion stack is provided with above liquid seal trough, when the flame in exhaust gas treating device is back to liquid seal trough, it can pass through
Pressure in the outside discharge gas of explosion stack, reduction liquid seal trough, it is to avoid the risk of explosion existed.
(4) a kind of bypass oxygenation type formaldehyde preparation system of the invention, is connected with buffer, the buffering on inlet pipeline
It is relatively small that device can slow down the bubble formed after air-flow velocity, outflow, by increasing capacitance it is possible to increase the contact area with liquid, so that
Internal gas is further absorbed, and reduces the imflammable gas amount of discharge, realizes the further absorption cleaning to discharging tail gas.
Brief description of the drawings
Fig. 1 is the schematic diagram for bypassing oxygenation type formaldehyde preparation system of the invention；
Fig. 2 is the structural representation of the exhaust gas processing device of the present invention；
Fig. 3 is the composition mechanism schematic diagram of liquid seal trough in the present invention；
Fig. 4 is the structural representation of buffer in the present invention；
Fig. 5 is the structural representation of U-shaped control position pipe in the present invention.
Label declaration in schematic diagram：
001st, methanol reboiler；002nd, methanol evaporator；003rd, blender；004th, filter；005th, oxidator；006、1#
Absorption tower；007th, 2# absorption towers；008th, formaldehyde finished pot；009th, vapor filter；
011st, air heater；012nd, drum；013rd, liquid seal trough；014th, exhaust gas treating device；015th, steam distributor；016、
Heater exhaust gas；
11st, tank body；12nd, buffer；121st, annular chamber；122nd, steel wool；123rd, screen cloth；124th, connecting leg is buffered；13rd, import
Pipeline；14th, explosion stack；15th, control valve；16th, outlet conduit；17th, liquid level gauge；18th, outflow valve.
Embodiment
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
As shown in figure 1, system include methanol reboiler 001, methanol evaporator 002, methanol feedstock tank, methanol pans and
Methanol filter is mainly to provide methanol feedstock not shown in figure, and methanol reboiler 001, methanol evaporator 002 connect successively
Connect, methanol feedstock tank provides methanol for methanol pans, then methanol is filtered by methanol filter, the first after filtering
The bottom that alcohol is passed through methanol reboiler 001 is heated, methanol heating and gasifying in methanol reboiler 001, the first of gasification
Alcohol is passed through methanol evaporator 002；
Methanol evaporator 002, vapor filter 009, heater exhaust gas 016 are connected with blender 003 respectively, and are mixing
Device 003 provides methanol steam, steam and tail gas successively, and the methanol steam, steam and tail gas are formed in blender 003
Mixed gas；
The one end of filter 004 is connected with blender 003, and the other end of filter 004 is connected with oxidator 005, blender 003
Drainage conduit on be connected with the blast pipe of air heater 011.Blender 003 is by mixed gas with the air after heating in pipeline
Filter 004 is passed through after middle mixing, filter 004 is passed through oxidator 005 after quaternary mixed gas is filtered, the quaternary is mixed
Gas is closed to contact with catalyst in oxidator 005 and heating response.
Oxidator 005 is connected with 1# absorption towers 006, and 1# absorption towers 006,2# absorption towers 007, exhaust gas treating device 014 are successively
Connection, 1# absorption towers 006 are connected with formaldehyde pans.The formaldehyde gas produced in oxidator 005 passes sequentially through 1# absorption towers
006th, 2# absorption towers 007 absorb, and the tail gas of generation is divided into two-way and is passed through at exhaust gas treating device 014 and heater exhaust gas 016, tail gas
Manage device 014 and exhaust combustion heating water is produced into steam, heater exhaust gas 016 will be passed through blender 003 after tail gas heating, 2# absorbs
Tower 007 is that 1# absorption towers 006 provide dilute formaldehyde by pump, and the formalin for meeting concentration of formaldehyde is pumped into first by 1# absorption towers 006
Aldehyde pans or formaldehyde finished pot 008, formaldehyde finished pot 008 are used to largely store finished product formaldehyde.
As shown in figure 1, methanol reboiler 001, air heater 011, vapor filter 009, heater exhaust gas 016 are distinguished
Heated by steam, the steam is generated by drum 012；Oxidator 005 has a quench zone, by cooling down soft water pair
The quench zone is cooled down, and the hot water of generation is passed through drum 012, and drum 012 is that exhaust gas treating device 014 provides hot water, tail gas
The steam that processor 014 heats the hot water being passed through generation by combustion tail gas is passed through drum 012.
Drum 012 is distributed steam to methanol reboiler 001, air heater 011, steam by steam distributor 015
Filter 009, heater exhaust gas 016.
The quaternary mixed gas first passes through spark arrester subsequently into oxidator 005 after purification, at 650 DEG C or so
At a temperature of and silver catalyst contact.Methanol evaporator 002 is passed through blender after separating drop through the mesh mist eliminator at the top of it
003。
The key point of the present embodiment is that the drainage conduit of blender 003 is connected with filter 004, and mixed material is conveyed
To oxidator 005, the blast pipe of air heater 011 is connected with the drainage conduit of blender 003.
Traditional blender is mostly quaternary blender, methanol gas and air, steam and tail gas is mixed together, so
Reacted afterwards by filter, oxidator, because blender volume is larger, it is different that obstructed gas enters orientation, can only be
Mixed in the process of circulation, be then easy to occur that local air amount is higher and the problem of higher some other part methanol contents, mixes
Close not abundant enough, it is uneven.In this case, follow-up reaction may also be difficult to abundant progress, cause prepared formaldehyde
Impurity contained in composite gas content is higher, and conversion ratio is relatively low；If in addition, methanol meets certain proportion with air content, be easy to
There is explosive event.
And the present embodiment mixes methanol and air on transfer pipeline, using both gas shocks in the duct
There is bigger disturbance, mix more uniform, be conducive to improving the conversion ratio reacted, and avoid causing because of air skewness
Risk of explosion, it is safe and reliable.
Embodiment 2
A kind of bypass oxygenation type formaldehyde preparation system of the present embodiment, its basic structure is same as Example 1, its difference
Be in：Angle is 80 ° between the drainage conduit of blender 003 and the blast pipe of oxidator 005, in the angle, air and just
Step gaseous mixture can flow to same direction, and be mixed in junction, and due to impact each other, two kinds of gases are mutual
Mixing blending, can be sufficiently mixed.Further, also pipeline expansion chamber, the circulation caliber of the expansion chamber can be set in junction
Slightly larger than the flow pipe diameter of mixed gas, then when air-flow enters mixed gas pipeline, because circulation area diminishes, meeting
Certain vortex is formed, so that gas mixing is more uniform.In addition, control junction is not less than apart from the port of filter 004
1m, specific length can be set according to specific pipeline deployment scenarios, and the main purpose of the structure is to ensure that methanol gas
There are enough times of contact with air, gas, which is mutually mixed, reaches stable state
Embodiment 3
A kind of bypass oxygenation type formaldehyde preparation system of the present embodiment, its basic structure is same as Example 2, its difference
Be in：The oxidized tail gas of the oxidator 005 of the present embodiment is delivered to 1# absorption towers 006,2# absorption towers 007 successively, and 2# absorbs
The tail gas part that tower 007 is discharged is delivered to blender 003 after being heated, and another part filters absorption of it by liquid seal trough 013
After be delivered to exhaust gas treating device 014, such as Fig. 2.
With reference to Fig. 3, liquid seal trough 013 includes connecting on tank body 11 and the explosion stack 14 positioned at the top of tank body 11, the explosion stack 14
Control valve 15 is connected to, the break-make for controlling the pipeline of explosion stack 14.The connection position of explosion stack 14 and tank body 11 is provided with pressure
After sensor, i.e. control valve 15 are closed, one section of the lower section of explosion stack 14 is connected with the inside of tank body 11, is set and is pressed in the connected component
Force snesor, the pressure for detecting tank interior.When pressure sensor detects the limit that pressure in tank body 11 exceedes setting
During value, control valve 15 is automatically opened up, and is exhausted by explosion stack 14.Also liquid level gauge 17 can be set in the side wall of tank body 11, be used for
The liquid level observed in tank body.Outflow valve 18 can be equipped with simultaneously, for adjusting liquid level.
In course of normal operation, the inlet pipeline 13 being connected with 2# absorption towers 007 extend into the bottom of tank body 11, exports quilt
Liquid-immersed, within the specific limits, then the gas discharged is located at the top in tank body to Liquid level, and defeated by outlet conduit 16
Deliver to exhaust gas treating device bottom to be burnt, described exhaust gas treating device is combustion furnace.
If exhaust gas treating device has certain failure, or to there is failure in other parts cause the gas lighted from outlet
Road 16 is entered in tank body 11, it will pressure in tank body 11 is increased sharply, and this dangerous due in closed state, very
Difficulty is found, if can not effectively solve, and may make fire spreading to other parts, or even that tank body 11 can occurs is quick-fried
It is fried.And the present embodiment is due to being provided with pressure sensor, when pressure sensor detects the pole that pressure in tank body 11 exceedes setting
During limit value, processor can be transmitted signals to, processor promotes control valve 15 to open, then can be arranged by explosion stack 14
Gas, although gas may burn away in the explosion stack mouth of pipe, but not result in considerable influence in a short time.Can in this period
Fire extinguishing processing is carried out by effective manner, can be returned to normal production in the short time, it is to avoid the deterioration of accident, and can have
Effect reduction loss.
Embodiment 4
A kind of bypass oxygenation type formaldehyde preparation system of the present embodiment, its basic structure is same as Example 3, its difference
Be in：The top of tank body 11 is additionally provided with buffer 12, and the inlet pipeline 13 on the buffer 12 is connected with absorption tower 2, passes through
Buffer 12 reduces tail gas flow velocity.
With reference to Fig. 4, buffer 12 is main to be made up of annular chamber 121 and buffering connecting leg 124, the upper end of annular chamber 121 and import
Pipeline 13 is connected, and the lower end of annular chamber 121 connection buffering connecting leg 124, the buffering connecting leg 124 is passed through the bottom of tank body 11.Annular chamber 121
Diameter is more than inlet pipeline 13, buffers the diameter of connecting leg 124, and diameter mentioned here refers to internal diameter, in the equal situation of wall thickness
Under, external diameter can form cylindrical protrusions.
Because the internal diameter of annular chamber 121 is larger, after the air-flow of inlet pipeline 13 is entered in annular chamber 121, flow velocity drop
Low, because the internal diameter for buffering connecting leg 124 is less than the internal diameter of annular chamber 121, air-flow can form certain vortex, into buffering connecting leg
124 air-flow velocity reduction.
Due to flow velocity reduction, air-flow is after buffering during the bottom of connecting leg 124 enters liquid, and the bubble formed is relatively
Small, the increase of its specific surface area contacted with liquid helps to absorb the pernicious gas in gas.If set in addition, not buffering
Put, air-flow directly impacts the bottom of tank body 11, there is certain infringement to tank body 11, and pass through after buffering, this damage can be reduced
Evil, extends the service life of tank body.
Embodiment 5
A kind of bypass oxygenation type formaldehyde preparation system of the present embodiment, its basic structure is same as Example 4, its difference
Be in：Tank body 11 is connected with water circulation system in the present embodiment, is circulation aqueous in tank body 11, then can be made by recirculated water
It is in unsaturated state, with stronger adsorption capacity, improves assimilation effect.
Further, in order to improve buffering effect, screen cloth 123 is provided with annular chamber 121, it is located at buffering connecting leg
124 porch.Screen cloth 123 has certain barrier effect to air-flow.In addition, the gas of discharge is gas liquid mixture, pass through institute
Screen cloth is set to be filtered to air-flow.
Embodiment 6
A kind of bypass oxygenation type formaldehyde preparation system of the present embodiment, its basic structure is same as Example 5, its difference
Be in：Screen cloth 123 is provided with annular chamber 121, it is located at the middle part of annular chamber 121, as shown in figure 4, being set in the top of screen cloth 123
Buffering filler is equipped with, the buffering filler is steel wool 122.
What deserves to be explained is, steel wool 122 is finer and closely woven relative to screen cloth, with more preferable choked flow effect, can improve buffering
Effect.But if steel wool is arranged on the porch of buffering connecting leg 124, the pressure of air-flow can make its have it is certain pile up, hold
The buffering entrance of connecting leg 124 is easily blocked, then air-flow is difficult to enter in buffering connecting leg 124.And screen cloth 123 is arranged on ring by the present embodiment
The middle part of shape chamber 121, its downside still has larger circulation area, while row buffering is entered, does not result in Airflow obstruction, ties
Structure sets reasonable.
Embodiment 7
A kind of bypass oxygenation type formaldehyde preparation system of the present embodiment, its basic structure is same as Example 6, its difference
Be in：With reference to Fig. 5, the side wall of tank body 11 is provided with U-shaped control position pipe.U-shaped control position pipe is connected with tank interior, can be according to need
It is arranged on specified altitude assignment, when liquid level amount increase, liquid can be flowed outwardly automatically by U-shaped control position pipe, can be very
Good control liquid level, it is not necessary to manual adjustment.
Schematical above that the present invention and embodiments thereof are described, the description does not have restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, are designed and the technical scheme without creative
Similar frame mode and embodiment, all should belong to protection scope of the present invention.
Claims (10)
1. one kind bypass oxygenation type formaldehyde preparation system, it is characterised in that：The charging aperture of the blender (003) of system respectively with first
Alcohol evaporator (002), heater exhaust gas (016) are connected with vapor filter (009), the drainage conduit of the blender (003) with
Filter (004) is connected, and mixed material is delivered in oxidator (005), the drainage conduit of the blender (003) is connected with
The blast pipe of air heater (011).
2. a kind of bypass oxygenation type formaldehyde preparation system according to claim 1, it is characterised in that：The blender
(003) angle is 70~82 ° between drainage conduit and the blast pipe of oxidator (005), and junction is held apart from filter (004)
Mouth is not less than 1m.
3. a kind of bypass oxygenation type formaldehyde preparation system according to claim 2, it is characterised in that：The oxidator
(005) oxidized tail gas is delivered to 1# absorption towers (006), 2# absorption towers (007) successively, 2# absorption towers (007) discharge
A tail gas part is delivered to blender (003) after being heated, another part is delivered to after being filtered absorption of by liquid seal trough (013)
Exhaust gas treating device (014).
4. a kind of bypass oxygenation type formaldehyde preparation system according to claim 3, it is characterised in that：The liquid seal trough
(013) include being connected with control valve on tank body (11) and the explosion stack (14) at the top of tank body (11), the explosion stack (14)
(15), the connection position of explosion stack (14) and tank body (11) is provided with pressure sensor, when pressure sensor detects tank body
(11) when interior pressure exceedes the limiting value of setting, control valve (15) is automatically opened up, and is exhausted by explosion stack (14).
5. a kind of bypass oxygenation type formaldehyde preparation system according to claim 4, it is characterised in that：Tank body (11) top
Portion is additionally provided with buffer (12), and the inlet pipeline (13) on the buffer (12) is connected with absorption tower (2), passes through buffer
(12) tail gas flow velocity is reduced.
6. a kind of bypass oxygenation type formaldehyde preparation system according to claim 5, it is characterised in that：The buffer (12)
Main to be made up of annular chamber (121) and buffering connecting leg (124), annular chamber (121) upper end is connected with inlet pipeline (13), ring
The buffering connecting leg (124) of shape chamber (121) lower end is passed through tank body (11) bottom；Annular chamber (121) diameter be more than inlet pipeline (13),
Buffer the diameter of connecting leg (124).
7. a kind of bypass oxygenation type formaldehyde preparation system according to claim 6, it is characterised in that：The annular chamber
(121) screen cloth (123) is provided with, it is located at the porch of buffering connecting leg (124).
8. a kind of bypass oxygenation type formaldehyde preparation system according to claim 6, it is characterised in that：The annular chamber
(121) screen cloth (123) is provided with, it is located in the middle part of annular chamber (121), buffering filler is provided with above screen cloth (123).
9. a kind of bypass oxygenation type formaldehyde preparation system according to claim 8, it is characterised in that：It is described buffering filler be
Steel wool (122).
10. according to a kind of bypass oxygenation type formaldehyde preparation system according to any one of claims 1 to 9, it is characterised in that：Institute
State tank body (11) side wall and be provided with liquid level gauge (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710564104.9A CN107311848A (en) | 2017-07-12 | 2017-07-12 | One kind bypass oxygenation type formaldehyde preparation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710564104.9A CN107311848A (en) | 2017-07-12 | 2017-07-12 | One kind bypass oxygenation type formaldehyde preparation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759823A (en) * | 2019-09-23 | 2020-02-07 | 扬州市众鑫化工有限公司 | Preparation method of low-concentration formaldehyde solution for water-based binder |
| CN112457177A (en) * | 2020-11-09 | 2021-03-09 | 潍坊惠丰化工有限公司 | Formaldehyde production energy-saving device and production process |
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| CN105418390A (en) * | 2015-11-17 | 2016-03-23 | 扬州市众鑫化工有限公司 | Energy-saving type continuous and circular production technology method for formaldehyde |
| CN205223061U (en) * | 2015-11-17 | 2016-05-11 | 安徽弘源化工科技有限公司 | A system's device for preparing formaldehyde |
| CN105294414A (en) * | 2015-11-19 | 2016-02-03 | 安徽中源化工有限公司 | Formaldehyde production system |
| CN207031306U (en) * | 2017-07-12 | 2018-02-23 | 安徽弘源化工科技有限公司 | One kind bypass oxygenation type formaldehyde preparation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110759823A (en) * | 2019-09-23 | 2020-02-07 | 扬州市众鑫化工有限公司 | Preparation method of low-concentration formaldehyde solution for water-based binder |
| CN112457177A (en) * | 2020-11-09 | 2021-03-09 | 潍坊惠丰化工有限公司 | Formaldehyde production energy-saving device and production process |
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