CN206232631U - A kind of system of paraformaldehyde depolymerization again - Google Patents
A kind of system of paraformaldehyde depolymerization again Download PDFInfo
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- CN206232631U CN206232631U CN201621317376.6U CN201621317376U CN206232631U CN 206232631 U CN206232631 U CN 206232631U CN 201621317376 U CN201621317376 U CN 201621317376U CN 206232631 U CN206232631 U CN 206232631U
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- depolymerization
- rake
- type dryer
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Abstract
The utility model is related to chemical production technical field, and in particular to a kind of system of paraformaldehyde depolymerization again.The system is after paraformaldehyde content reaches 96% in rake type dryer, to add methyl alcohol that paraformaldehyde is carried out into depolymerization in rake type dryer, and the depolymerization liquid after depolymerization directly squeezes into storage tank with pump.Air pollution that may be present when reducing the discharging of 96% paraformaldehyde, transhipment using the utility model, can cancel make-up room, reduce factory site, save the costs such as artificial, transit vehicle, save the poly depolymerization time in glyphosate production process.
Description
Technical field
The utility model is related to chemical production technical field, and in particular to a kind of system of paraformaldehyde depolymerization again.
Background technology
In the paraformaldehyde production later stage, then the concentration of formaldehyde into rake type dryer is steamed 70% or so by addition
Gas evaporates excessive moisture, obtains content >=96% paraformaldehyde finished product, and then rake is transported in doing material to transfer box by fork truck
Between drying, between drying in cool down material after, obtain the satisfactory product of granularity by broken, then pack 0.6125T/
Bag.
During discharging and product are crushed, packed, there are a large amount of flying dusts, formaldehyde gas to be dispersed into environment, although to use
Vacuum system is collected flying dust, gas and is then delivered to boiler combustion, but wastes substantial amounts of material and pollution environment；In the process of transhipment
In, because transfer box can not be hermetically sealed, distribute in the process in substantial amounts of formaldehyde gas to environment, pollute environment.
But because environmental protection, concentration accord with requirement of occupational health are more and more stricter at this stage, when rake type dryer discharges the gas that produces and
Dust has been not suitable for enterprise development requirement at this stage, and the gas produced by rake type dryer is processed in the urgent need to separately seeking technological means
Body and dust.
Paraformaldehyde product is used as production glyphosate, it is necessary to 96% paraformaldehyde first during glyphosate is produced
Produced again after alcohol depolymerization.During glyphosate is produced generally the depolymerization method that uses for：20m3 stirred autoclaves
One, methyl alcohol 8.6t, 96% paraformaldehyde 1.225t, triethylamine 2.1t are added, at 50 DEG C, the reaction time is 1 to controlling reaction temperature
Hour.Production process is very complicated, and floor space is big, and introduces new impurity.
The content of the invention
The purpose of this utility model is the system that there are provided a kind of depolymerization again of paraformaldehyde.
Technical solutions of the utility model are as follows：
A kind of system of paraformaldehyde depolymerization again, including rake type dryer, the rake type dryer by pipeline with absorb
Tower is connected, and the absorption tower is connected by pipeline with rake dry vacuum case, and the rake type dryer is buffered by pipeline with depolymerization liquid
Tank is connected, and the rake type dryer is connected by pipeline with methanol tank.
Preferably, the depolymerization liquid surge tank is connected with depolymerization liquid storage tank.
Preferably, the rake dry vacuum case is rake type dryer vacuum tank.
Preferably, the depolymerization liquid storage tank is the device that material is made for stainless steel, is shaped as vertical tank body.
Preferably, the rake type dryer is provided with rake type dryer atmospheric valve, steam valve, the rake type dryer and methyl alcohol
Methanol flow meter outlet valve, methanol pump, methanol flow meter are provided between storage tank, the absorption tower is provided with absorption tower circulating pump, inhales
Tower circulation pump valve is received, rake dry vacuum case valve is provided between the absorption tower and rake dry vacuum case.
Using described system by the method for paraformaldehyde depolymerization again, the described method comprises the following steps：
1）In rake type dryer after paraformaldehyde content >=96%, stop drying, add formalin to carry out depolymerization, obtain
Depolymerization liquid；
2）The step 1）The depolymerization night that depolymerization is completed is directly used in the production of glyphosate.
Preferably, the step 1）De-polymerization temperature is 50 ~ 80 DEG C.
It is further preferred that the step 1）De-polymerization temperature is 70 ~ 75 DEG C.
Described system or described method is applied to the production of glyphosate.
The utility model beneficial effect：
1st, the utility model is just first carried out the depolymehzation step in glyphosate production process, when being that glyphosate production is saved
Between, while having prevented when rake type dryer discharges and follow-up broken, packaging generation dust, gaseous contamination.
2nd, new large scale equipment need not be put into, only pipeline, intermediate buffer tank need to be made；
3rd, environmental protection is the second life of chemical enterprise, when that can prevent rake type dryer discharging after transformation, the packaging phase
Between the dust, the gaseous contamination that are brought.
4th, paraformaldehyde depolymehzation step in glyphosate production process is reduced, 0.5 ~ 1 hour process time is saved.
5th, expense is saved：Transit vehicle expense when rake type dryer discharges before improving：50000/year；Labour cost：580000/
Year；Water, electricity, gas：In 8.5 ten thousand/year, amount to：71.5 ten thousand yuan, using technical solutions of the utility model after, can save this spending.
6th, after paraformaldehyde content reaches 96% in rake type dryer, add methyl alcohol by paraformaldehyde in rake type dryer
Depolymerization is inside carried out, the depolymerization liquid after depolymerization directly squeezes into storage tank with pump, and the later stage is used directly for production.
7th, because poly liquid has severe corrosive, therefore depolymerization liquid storage tank is made using 304 stainless steels.
8th, it is the reason for configuration depolymerization liquid surge tank：The poly- degree of depolymerization lyolysis can be observed at surge tank, is easy to control
Product quality processed.
9th, the reason for configuring rake type dryer vacuum tank is that rake type dryer vacuum tank is done as vavuum pump and rake
Surge tank between dry device is used, and stabilization vacuum pressure is conducive to operating mode, control more to stablize.
10th, the strict control de-polymerization temperature in depolymehzation process, the time required to depolymerization can be greatly reduced, reduces side reaction
Occur.
Brief description of the drawings
Fig. 1 is the utility model system schematic；
Wherein：Rake type dryer 1, rake dry vacuum case 2, absorption tower 3, depolymerization liquid surge tank 4, depolymerization liquid storage tank 5, vehicle 6
, rake type dryer atmospheric valve 7, rake dry vacuum case valve 8, pump valve 10 is circulated on absorption tower circulating pump 9, absorption tower, and methanol flow meter goes out
Mouth valve 11, methanol pump 12, methanol flow meter 13, steam valve 14, methanol tank 15.
Specific embodiment
The utility model is described further below in conjunction with the accompanying drawings：
Embodiment 1
As shown in figure 1, a kind of system of paraformaldehyde depolymerization again, including rake type dryer 1, the rake type dryer 1 leads to
Piping is connected with absorption tower 3, and the absorption tower 3 is connected by pipeline with rake dry vacuum case 2, and the rake type dryer 1 passes through
Pipeline is connected with depolymerization liquid surge tank 4, and the rake type dryer 1 is connected by pipeline with methanol tank 15.
The depolymerization liquid surge tank 4 is connected with depolymerization liquid storage tank 5.
The rake dry vacuum case 2 is rake type dryer vacuum tank.
The depolymerization liquid storage tank 5 is the device that material is made for stainless steel, is shaped as vertical tank body.
The rake type dryer 1 is provided with rake type dryer atmospheric valve 7, steam valve 14, and the rake type dryer 1 and methyl alcohol are stored up
Methanol flow meter outlet valve 11, methanol pump 12, methanol flow meter 13 are provided between tank 15, the absorption tower 3 is provided with absorption tower and follows
Ring pump 9, absorption tower circulates pump valve 10, and rake dry vacuum case valve 8 is provided between the absorption tower 3 and rake dry vacuum case 2.
Embodiment 2
Using the system described in embodiment 1 by the method for paraformaldehyde depolymerization again, the described method comprises the following steps：
1）In rake type dryer after paraformaldehyde content >=96%, stop drying, add formalin to carry out depolymerization, obtain
Depolymerization liquid；
2）The step 1）The depolymerization night that depolymerization is completed is directly used in the production of glyphosate.
The step 1）De-polymerization temperature is 50 ~ 80 DEG C.At 50 ~ 80 DEG C, the depolymerization time is 1 hour ~ 20 minutes 1 hour, high
It is easily readily volatilized in 80 DEG C of formaldehyde, increase production cost.
Described system or described method is applied to the production of glyphosate.
Concrete operation method：
1）After rake type dryer sampling analysis paraformaldehyde content >=96%, rake type dryer atmospheric valve, rake are closed dry true
Empty van valve, stops absorption tower circulating pump, opens methanol flow meter terminal valve；
2）Methanol pump is opened, enters methyl alcohol, after adding methyl alcohol, stop methanol pump, close methanol flow meter terminal valve.
3）50 ~ 80 DEG C of control rake type dryer temperature, controls temperature, adjusts in time into steam valve, forbids overtemperature, reacts
Later stage, to reaction end temp kept in balance, is not changed into reaction end.
4）Reaction started to become clear close to 1 hour or so the dry visor of rake, took each kettle reaction solution sample, and blowing is opened after analysis is qualified
Valve blowing.
5）Between confirmation black motorcycle after tank level, depolymerization liquid storage tank material inlet valve is opened, open surge tank pump, beaten toward black and hold in the palm
Workshop, notes depolymerization liquid storage tank liquid level and poly surge tank liquid level, termination of pumping in time after having beaten.
6）After the dry depolymerization liquid blowing of rake is finished, into the dry feeding flow of rake next time.
Embodiment 3
Using the system described in embodiment 1 by the method for paraformaldehyde depolymerization again, the described method comprises the following steps：
1）In rake type dryer after paraformaldehyde content >=96%, stop drying, add formalin to carry out depolymerization, obtain
Depolymerization liquid；
2）The step 1）The depolymerization night that depolymerization is completed is directly used in the production of glyphosate.
The step 1）De-polymerization temperature is 70 ~ 75 DEG C.The depolymerization time is 0.5 ~ 1 hour, and depolymerization at this temperature,
Later stage is 50 ~ 55 DEG C of production to glyphosate in the production process of glyphosate, is just met for depolymerization liquid by transport
It is required that.
Described system or described method is applied to the production of glyphosate.
The above embodiments are only optimal technical scheme of the present utility model, and are not construed as limit of the present utility model
System, the feature in embodiment and embodiment in the application can mutually be combined in the case where not conflicting.This practicality is new
Technical characteristic in the technical scheme that the protection domain of type should be recorded with claim, including the technical scheme of claim record
Equivalents are protection domain.Equivalent i.e. within this range is improved, also protection domain of the present utility model it
It is interior.
Claims (5)
1. a kind of system of paraformaldehyde depolymerization again, including rake type dryer（1）, it is characterised in that：The rake type dryer（1）
By pipeline and absorption tower（3）Connection, the absorption tower（3）By pipeline and rake dry vacuum case（2）Connection, the rake is dried
Device（1）By pipeline and depolymerization liquid surge tank（4）Connection, the rake type dryer（1）By pipeline and methanol tank（15）Even
Connect.
2. system according to claim 1, it is characterised in that：The depolymerization liquid surge tank（4）With depolymerization liquid storage tank（5）Even
Connect.
3. system according to claim 1, it is characterised in that：The rake dry vacuum case（2）It is rake type dryer vacuum tank.
4. system according to claim 1, it is characterised in that：The depolymerization liquid storage tank（5）By material by stainless steel is made
Device, be shaped as vertical tank body.
5. system according to claim 1, it is characterised in that：The rake type dryer（1）It is provided with rake type dryer emptying
Valve（7）, steam valve（14）, the rake type dryer（1）And methanol tank（15）Between be provided with methanol flow meter outlet valve（11）、
Methanol pump（12）, methanol flow meter（13）, the absorption tower（3）It is provided with absorption tower circulating pump（9）, absorption tower circulation pump valve
（10）, the absorption tower（3）With rake dry vacuum case（2）Between be provided with rake dry vacuum case valve（8）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621317376.6U CN206232631U (en) | 2016-12-03 | 2016-12-03 | A kind of system of paraformaldehyde depolymerization again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621317376.6U CN206232631U (en) | 2016-12-03 | 2016-12-03 | A kind of system of paraformaldehyde depolymerization again |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206232631U true CN206232631U (en) | 2017-06-09 |
Family
ID=58977661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621317376.6U Active CN206232631U (en) | 2016-12-03 | 2016-12-03 | A kind of system of paraformaldehyde depolymerization again |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206232631U (en) |
-
2016
- 2016-12-03 CN CN201621317376.6U patent/CN206232631U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200813 Address after: 443007 no.66-4, Juting Avenue, liaoting District, Yichang City, Hubei Province Patentee after: HUBEI TAISHENG CHEMICAL Co.,Ltd. Address before: 443311, Huaxin Road 8, branch Town, Yichang, Hubei, Yidu Patentee before: YIDU DUOBANG CHEMICAL Co.,Ltd. |