CN208430064U - A kind of fixed bed heat reclamation type Ammoximation reaction system - Google Patents
A kind of fixed bed heat reclamation type Ammoximation reaction system Download PDFInfo
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- CN208430064U CN208430064U CN201820693778.9U CN201820693778U CN208430064U CN 208430064 U CN208430064 U CN 208430064U CN 201820693778 U CN201820693778 U CN 201820693778U CN 208430064 U CN208430064 U CN 208430064U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a kind of fixed bed heat reclamation type Ammoximation reaction systems, including reacting clear liquid surge tank, reaction cycle pump, oximate pre-reactor and oximation reaction device, the discharge port for reacting clear liquid surge tank is connected to the feed inlet of reaction cycle pump by pipeline, the discharge port of reaction cycle pump is connected to the feed inlet of oximate pre-reactor by reaction cycle liquid pipe line, the discharge port of oximate pre-reactor is connected to the feed inlet of oximation reaction device by reaction solution feeding line, the discharge port of oximation reaction device is connected to the feed inlet of reaction clear liquid surge tank by reaction solution discharging pipeline.The utility model is by being directly entered reaction clear liquid surge tank after oximate pre-reactor, oximation reaction device, the equipment such as the catalyst for having simplified Ammoximation reaction system adds, discharging, oximation reaction kettle, membrane tube, reduce operating cost, it solves reaction recuperation of heat by duct type fixed bed, reduces the configuration such as membrane tube filtering and large-scale oximation reaction kettle.
Description
Technical field
The utility model belongs to chemical technology field more particularly to a kind of fixed bed heat reclamation type Ammoximation reaction system.
Background technique
Cyclohexanone oxime is the important intermediate for preparing caprolactam.The method for preparing cyclohexanone oxime in the world at present mainly has
Hydroxyl sulfate method (HSO method), nitric oxide reduction method (NO method), phosphatic hydroxylamine method (HPO method) and ammonia deuteration method (HAO method).Its
The sulphur ammonium of middle HSO method and NO method complex process and by-product low value；Although by-product sulphur ammonium, technical process do not want refinement to HPO method
Carefully, operation difficulty is big, and has NOxIt generates, there are the difficult problem of environmental protection.Currently, HSO method, NO method are gradually eliminated, China is in oneself
The main stream approach of amide production is HAO method, and the main method of this technique is that cyclohexanone is catalyzed in slurry bed (Titanium Sieve Molecular Sieve)
Under the conditions of with hydrogen peroxide, ammonia occur Ammoximation reaction, obtain cyclohexanone oxime.Ammonia deuteration method prepares cyclohexanone oxime method simply, no
By-product sulphur ammonium, without the difficult problem of environmental protection, therefore in recent years quite by the favor of caprolactam industry, but found from the production of last decade
There is also following problems for slurry bed Ammoximation reaction.
Firstly, reaction heat cannot be recycled.Ammoximation reaction has that thermal discharge big (301KJ/mol), be swift in response (3s
It is interior achievable) the features such as, in order to control reaction temperature, the method generallyd use at present is to add circulation pipe outside oximation reaction device
Line configures cooler to control temperature, and which results in the wastes of reaction heat.
Secondly, oximation reaction device equipment cost is higher.Cyclohexanone oxamidinating reactor 100,000 tons/year of production lines in China's are general
Configure 2 ~ 3 80-100m3The reaction kettle of volume, if built-in stainless steel membrane tube, single reaction kettle need to configure 500 or more, such as
The external ceramic-film tube of fruit, single reaction kettle need to configure 2000 or more, if single oximation reaction kettle is always thrown using ceramic-film tube
Enter 30,000,000 or more, 6000-8000 ten thousand is up to if always putting into using stainless steel membrane tube.
Finally, cannot combine the maintenance of oximation reaction device conveniently and quickly improves two aspect of production capacity.External ceramic-film tube
It is capable of the raising production capacity of aspect, but needs frequently to produce a large amount of waste water to membrane tube alkali cleaning, pickling in production process, and
Ceramic membrane has the loss of larger proportion because of its intrinsic weakness (intensity is lower).Stainless steel membrane tube is placed in reaction kettle, and one
There is membrane tube stopping state in denier, it is necessary to and it is out of service, alkali cleaning or replacement membrane tube are carried out, influences normally to produce.
In 3 points described above, second, third point can be attributed to a bit in fact, i.e. the improvement of catalyst filtration mode.
So the main problems faced of Ammoximation reaction system is the recycling of reaction heat and two aspects of improvement of filter type at present.
Summary of the invention
For deficiency of the prior art, the technical problem to be solved by the utility model is to provide a kind of fixations
Bed is able to carry out the Ammoximation reaction system of reaction recuperation of heat.The system overhaul is convenient, has saved consolidating for oximation reaction stage
Determine capital input, and is able to achieve quick capacity expansion revamping.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of fixed bed heat reclamation type Ammoximation reaction system, including reaction clear liquid surge tank, reaction cycle pump, oximate are pre-
Reactor and oximation reaction device, the discharge port for reacting clear liquid surge tank are connected to the feed inlet of reaction cycle pump by pipeline, instead
The discharge port of circulating pump is answered to be connected to the feed inlet of oximate pre-reactor by reaction cycle liquid pipe line, oximate pre-reactor goes out
Material mouth is connected to the feed inlet of oximation reaction device by reaction solution feeding line, and the discharge port of oximation reaction device is gone out by reaction solution
Expects pipe line is connected to the feed inlet of reaction clear liquid surge tank.
Preferably, oximate pre-reactor be equipped with hydrogen peroxide feed lines, gas ammonia feed lines, fed cyclohexanone route,
Tert-butyl alcohol feed lines, refrigerant feed inlet and refrigerant discharge port.
Preferably, oximation reaction device is equipped with refrigerant feeding line and refrigerant discharging pipeline.
Consolidate preferably, the inside of oximate pre-reactor is equipped with tubular fixed-bed, tubular fixed-bed lower end equipped with tubular type
Fixed bed bottom feed inlet, tubular fixed-bed upper end is equipped with tubular fixed-bed top discharge mouth, tubular fixed-bed to be equipped with titanium silicon point
Son sieve adhesive layer, the outside of Titanium Sieve Molecular Sieve adhesive layer are equipped with Titanium Sieve Molecular Sieve fixed bed.
Outer filter device is in series on the pipeline between clear liquid surge tank and reaction cycle pump preferably, reacting.
Preferably, the upper end of reaction clear liquid surge tank is equipped with pressure control line.
Preferably, the side of circulation fluid route, which is connected with, sends reaction solution pipeline outside.
The utility model has the advantage, that
After the fixed bed heat reclamation type Ammoximation reaction system of the utility model is by oximate pre-reactor, oximation reaction device
Be directly entered reaction clear liquid surge tank, the catalyst for having simplified Ammoximation reaction system adds, discharging, oximation reaction kettle,
The equipment such as membrane tube both reduce operating cost, can also be rapidly performed by expansion energy, solve reaction heat by duct type fixed bed
It recycles, reduces the configuration such as membrane tube filtering and large-scale oximation reaction kettle, in the case where not influencing equipment normal operation, Neng Goushi
The regeneration of existing catalyst uses.
Detailed description of the invention
Fig. 1 is the system structure diagram of the utility model.
Fig. 2 is the Longitudinal cross section schematic of oximate pre-reactor in the utility model.
Fig. 3 is the cross-sectional view of oximation reaction device in the utility model.
Fig. 4 is Longitudinal cross section schematic tubular fixed-bed in the utility model.
In figure: 1 pumps for reaction clear liquid surge tank, 2 for reaction cycle, and 3 be the first oximate pre-reactor, and 4 be the second oximate
Pre-reactor, 5 be the first oximation reaction device, and 6 be the second oximation reaction device, and 7 be pressure control line, and 8 be hydrogen peroxide feeding line
Road, 9 be gas ammonia feed lines, and 10 be fed cyclohexanone route, and 11 be tert-butyl alcohol feed lines, and 12 be the first oximate pre-reactor
Refrigerant feed inlet, 13 be the second oximate pre-reactor refrigerant feed inlet, and 14 be the first oximate pre-reactor refrigerant discharge port, and 15 are
Second oximate pre-reactor refrigerant discharge port, 16 be the first oximation reaction device refrigerant feeding line, and 17 be the second oximation reaction device
Refrigerant feeding line, 18 for the first oximation reaction device refrigerant discharge pipeline, 19 for the second oximation reaction device refrigerant discharge pipeline, 20
It is reaction solution discharging pipeline for reaction solution feeding line, 21,22 be outer filter device, and 23 be reaction cycle liquid pipe line, and 24 be outer
Reaction solution pipeline is sent, 25 be Titanium Sieve Molecular Sieve fixed bed, and 26 be Titanium Sieve Molecular Sieve adhesive layer, and 27 go out for tubular fixed-bed top
Material mouth, 28 be tubular fixed-bed bottom feed inlet, and 29 feed for endless tube, and 30 be endless tube feed inlet, and 31 be tubular fixed-bed.
Specific embodiment
As shown in Figure 1, the utility model provides a kind of fixed bed heat reclamation type Ammoximation reaction system, including reaction clear liquid
Surge tank 1, reaction cycle pump 2, oximate pre-reactor and oximation reaction device, the discharge port of reaction clear liquid surge tank 1 pass through pipeline
It is connected to the feed inlet of reaction cycle pump 2, to be connected to oximate pre- by reaction cycle liquid pipe line 23 for the discharge port of reaction cycle pump 2
The feed inlet of reactor, the discharge port of oximate pre-reactor are connected to the charging of oximation reaction device by reaction solution feeding line 20
Mouthful, the discharge port of oximation reaction device is connected to the feed inlet of reaction clear liquid surge tank 1 by reaction solution discharging pipeline 21.Reaction is clear
It is in series with outer filter device 22 on pipeline between liquid surge tank 1 and reaction cycle pump 2, filtering accuracy can be set to 1 ~ 10 μ
M prevents fixed bed breakage from bringing catalyst granules into process, and outer filter device 22 is set as one and opens standby a, periodic cleaning, no
It will affect normal production.The upper end for reacting clear liquid surge tank 1 is equipped with pressure control line 7.React the main work of clear liquid surge tank 1
There are three, first is reaction clear liquid buffering, and process stable operation after guarantee, second is that oximate side reaction has gas generation,
Prevent inside reactor from building the pressure, third provides charging for reaction cycle pump 2.
Oximate pre-reactor includes the first oximate pre-reactor 3 and the second oximate pre-reactor 4.First oximate pre-reactor
3 are equipped with hydrogen peroxide feed lines 8, gas ammonia feed lines 9, fed cyclohexanone route 10, tert-butyl alcohol feed lines 11, the first oximate
Pre-reactor refrigerant feed inlet 12 and the first oximate pre-reactor refrigerant discharge port 14.Second oximate pre-reactor 4 is equipped with dioxygen
Water feed lines 8, gas ammonia feed lines 9, fed cyclohexanone route 10, tert-butyl alcohol feed lines 11, the second oximate pre-reactor
Refrigerant feed inlet 13 and the second oximate pre-reactor refrigerant discharge port 15.
Oximation reaction device includes the first oximation reaction device 5 and the second oximation reaction device 6.First oximation reaction device 5 is equipped with the
One oximate reactor refrigerant feeding line 16 and the first oximation reaction device refrigerant discharging pipeline 18.Second oximation reaction device 6 is equipped with
Second oximation reaction device refrigerant feeding line 17 and the second oximation reaction device refrigerant discharging pipeline 19.The side of circulation fluid route 23
It is connected with and sends reaction solution pipeline 24 outside.
As shown in Figure 1, the first oximate pre-reactor 3 and 4 input and output material pipeline of the second oximate pre-reactor use endless tube form,
Guarantee that material is uniformly mixed, refrigerant feeding line flows to identical with reaction solution, because oximation reaction is transient response, material is contacted
It reacts rapidly afterwards, refrigerant is contacted with reaction solution as early as possible, removes reaction heat.
As shown in Fig. 2, oximate pre-reactor is similar with oximation reaction device structure in oximation reaction system.Choose first
Oximate pre-reactor 3 is as signal, circulation fluid route 23, hydrogen peroxide feed lines 8, gas ammonia feed lines 9, fed cyclohexanone line
Road 10, tert-butyl alcohol feed lines 11 are all made of endless tube form and feed, and there are four feed inlet on every charging endless tube, fast and easy is mixed
Close charging.
As shown in Fig. 2, circulation fluid charging 23, sending reaction solution pipeline 20 outside and being arranged in the first oximate pre-reactor 3 as far as possible
Both ends, extend the reaction stream residence time, increase heat transfer distances.
As shown in Fig. 2, reaction occurs in the tube side of oximate pre-reactor, it in this way can be to avoid reflecting existing abnormal conditions
When, bulk gas generates, and oximate pre-reactor builds the pressure.
As shown in figure 3, reaction is sent in four bursts of reaction feeds (hydrogen peroxide, gas ammonia, cyclohexanone, the tert-butyl alcohol), circulation fluid charging outside
Liquid, totally six strands of input and output materials, endless tube feed the overlapping of 29(feed entrance point), endless tube feed inlet 30, tubular fixed-bed 31, every input and output material
4 feed inlets (sending reaction solution outside is discharge port) is provided on endless tube, totally 16 feed inlet and outlets.In order to keep various material mixing equal
With avoid hydrogen peroxide from directly contacting with ammonia, 24 feed inlets setting deviation angles are 15o。
As shown in figure 4, it is Titanium Sieve Molecular Sieve that the inside of oximate pre-reactor, which is equipped with tubular fixed-bed 31, tubular fixed-bed 31,
Tubular fixed-bed, overall structure is similar to heat exchanger form.Tubular fixed-bed 31 lower end is equipped with tubular fixed-bed bottom feed inlet
28, tubular fixed-bed 31 upper end is equipped with tubular fixed-bed top discharge mouth 27, and tubular fixed-bed 31 is attached equipped with Titanium Sieve Molecular Sieve
Layer 26, the outside of Titanium Sieve Molecular Sieve adhesive layer 26 be equipped with Titanium Sieve Molecular Sieve fixed bed 25.
Metal film pipe is connected using threaded one end, can bear 1Mpa pressure completely, the tubular fixed-bed of metal film tubular type is adopted
It is connected with threaded one end, it is easy to disassemble.
Tubular fixed-bed 31 have biggish contact area, if 475 tubular fixed-bed 31 built in separate unit reactor, often
Root diameter 3cm, high 2m, contact area can reach 90m2, the contact area of connecting with reactor 5 of pre-reactor 3 can reach 180m2, greatly
In metal film pipe contact area.Tubular fixed-bed 31 is larger with reaction stream contact area, and heat transfer coefficient is preferable, returns convenient for heat
It receives.
The course of work
Start fixed bed heat reclamation type Ammoximation reaction system, after certain liquid level tert-butyl alcohol is added in reaction clear liquid storage tank 1
Come into operation external filter 22, starts circulating pump 2, establishes whole circulation, the first oximate pre-reactor 3 and the second oximate pre-reactor
4, the first oximation reaction device 5 and the second oximation reaction device 6 pass sequentially through the first oximate pre-reactor refrigerant feed inlet 12, the second oxime
Change pre-reactor refrigerant feed inlet 13, the first oximate pre-reactor refrigerant discharge port 14, the discharging of the second oximate pre-reactor refrigerant
After mouth 15 puts into refrigerants, reaction mass hydrogen peroxide passes through gas ammonia feed lines 9, cyclohexanone by hydrogen peroxide feed lines 8, gas ammonia
It is pre- into the first oximate by endless tube feed inlet again by tert-butyl alcohol feed lines 11 by fed cyclohexanone route 10, the tert-butyl alcohol
Reactor 3 and the second oximate pre-reactor 4 mix in the first oximate pre-reactor 3 and the second oximate pre-reactor 4, are pre- anti-
Should after through reaction solution feeding line 20 enter the first oximation reaction device 5 and the second oximation reaction device 6, further reaction after through reacting
Liquid discharging pipeline 21 is sent outside to reaction solution surge tank 1, is reacted pressure in clear liquid surge tank 1 and is controlled by pressure adjusting circuit 7, is guaranteed
Pressure (preferably 0.2Mpa ~ 0.3Mpa) in surge tank 1 controls oximate by adjusting the feeding temperature or flow of four strands of refrigerants
Reaction temperature (preferably 80 ~ 90 DEG C), in reaction solution surge tank 1 liquid level controlled by sending reaction solution pipeline 24 outside (preferably 30% ~
50%).
Selection for refrigerant can directly use recirculated water, but be unable to absorbing reaction heat in this way, preferably extract to rear process
Take liquid preheating, waste water preheating etc..
Entire oximation reaction system passes through the first oximate pre-reactor 3 and the second oximate pre-reactor 4, the first oximation reaction
It is directly entered reaction solution surge tank 1 after device 5 and the second oximation reaction device 6, has simplified the catalyst of Ammoximation reaction system
It adds, discharging, oximation reaction kettle, the equipment such as membrane tube, that is, reduces operating cost, can also be rapidly performed by expansion energy.
Embodiment described above is only that preferred embodiments of the present invention are described, and is not departing from this reality
Under the premise of new design spirit, various modifications that those of ordinary skill in the art make the technical solution of the utility model
And improvement, it should all fall into the protection scope that the utility model claims book determines.
Claims (7)
1. a kind of fixed bed heat reclamation type Ammoximation reaction system, it is characterised in that: including reacting clear liquid surge tank, reaction cycle
Pump, oximate pre-reactor and oximation reaction device, the discharge port for reacting clear liquid surge tank are connected to reaction cycle pump by pipeline
The discharge port of feed inlet, reaction cycle pump is connected to the feed inlet of oximate pre-reactor by reaction cycle liquid pipe line, and oximate is pre-
The discharge port of reactor is connected to the feed inlet of oximation reaction device by reaction solution feeding line, and the discharge port of oximation reaction device is logical
Cross the feed inlet that reaction solution discharging pipeline is connected to reaction clear liquid surge tank.
2. fixed bed heat reclamation type Ammoximation reaction system as described in claim 1, it is characterised in that: oximate pre-reactor is set
There are hydrogen peroxide feed lines, gas ammonia feed lines, fed cyclohexanone route, tert-butyl alcohol feed lines, refrigerant feed inlet and refrigerant
Discharge port.
3. fixed bed heat reclamation type Ammoximation reaction system as claimed in claim 2, it is characterised in that: oximation reaction device is equipped with
Refrigerant feeding line and refrigerant discharging pipeline.
4. fixed bed heat reclamation type Ammoximation reaction system as claimed in claim 3, it is characterised in that: oximate pre-reactor
Inside is equipped with tubular fixed-bed, tubular fixed-bed lower end and is equipped with tubular fixed-bed bottom feed inlet, tubular fixed-bed upper end
It is tubular fixed-bed to be equipped with Titanium Sieve Molecular Sieve adhesive layer equipped with tubular fixed-bed top discharge mouth, Titanium Sieve Molecular Sieve adhesive layer it is outer
Side is equipped with Titanium Sieve Molecular Sieve fixed bed.
5. fixed bed heat reclamation type Ammoximation reaction system as claimed in claim 4, it is characterised in that: reaction clear liquid surge tank
Outer filter device is in series on pipeline between reaction cycle pump.
6. fixed bed heat reclamation type Ammoximation reaction system as claimed in claim 5, it is characterised in that: reaction clear liquid surge tank
Upper end be equipped with pressure control line.
7. fixed bed heat reclamation type Ammoximation reaction system as claimed in claim 6, it is characterised in that: the one of circulation fluid route
Side, which is connected with, sends reaction solution pipeline outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820693778.9U CN208430064U (en) | 2018-05-10 | 2018-05-10 | A kind of fixed bed heat reclamation type Ammoximation reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820693778.9U CN208430064U (en) | 2018-05-10 | 2018-05-10 | A kind of fixed bed heat reclamation type Ammoximation reaction system |
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| CN208430064U true CN208430064U (en) | 2019-01-25 |
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| CN201820693778.9U Withdrawn - After Issue CN208430064U (en) | 2018-05-10 | 2018-05-10 | A kind of fixed bed heat reclamation type Ammoximation reaction system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108530316A (en) * | 2018-05-10 | 2018-09-14 | 中国平煤神马集团尼龙科技有限公司 | A kind of fixed bed heat reclamation type Ammoximation reaction system |
-
2018
- 2018-05-10 CN CN201820693778.9U patent/CN208430064U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108530316A (en) * | 2018-05-10 | 2018-09-14 | 中国平煤神马集团尼龙科技有限公司 | A kind of fixed bed heat reclamation type Ammoximation reaction system |
| CN108530316B (en) * | 2018-05-10 | 2023-07-04 | 中国平煤神马集团尼龙科技有限公司 | Fixed bed heat recovery type ammoximation reaction system |
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| AV01 | Patent right actively abandoned |