CN203155229U - Continuous nitration system with automatic overflow function - Google Patents
Continuous nitration system with automatic overflow function Download PDFInfo
- Publication number
- CN203155229U CN203155229U CN 201320213629 CN201320213629U CN203155229U CN 203155229 U CN203155229 U CN 203155229U CN 201320213629 CN201320213629 CN 201320213629 CN 201320213629 U CN201320213629 U CN 201320213629U CN 203155229 U CN203155229 U CN 203155229U
- Authority
- CN
- China
- Prior art keywords
- overflow
- nitrator
- reaction
- nitration
- nitrators
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a continuous nitration system with an automatic overflow function. The continuous nitration system comprises at least three overflow nitrators which are sequentially and serially connected. Each overflow nitrator is provided with a raw material inlet and an overflow port. The overflow port of each overflow nitrator is connected with the raw material inlet of the next overflow nitrator through a pipe. Since the overflow nitrators of the continuous nitration system are serially connected, after materials are nitrated in one overflow nitrator, the materials enter the next overflow nitrator for continuous nitration, so that the nitration reaction can be sequentially and continuously conducted in all the overflow nitrators, nitration products are continuously produced, and the nitration reaction efficiency is improved.
Description
Technical field
The utility model relates to the chemical reaction device field, is specifically related to a kind of continuous nitrification system of automatic overflow.
Background technology
Aromatic nitro compound is the very important Organic Chemicals of a class, is widely used in the industrial production of products such as agricultural chemicals, medicine, explosive, dyestuff, chemical fibre and rubber, and demand is very big.Industrial, aromatic nitro compound generally is nitrated production of parent's electricity by aromatic hydrocarbons, and the nitration mixture with red fuming nitric acid (RFNA) and the concentrated sulfuric acid is nitrating agent usually.
Mixed acid nitrification generally carries out in tank reactor.At present, known nitrated device mainly contains two kinds of patterns: the digester of the kettle type nitration device of tep reel pipe and band outer circulation tubular heat exchanger.The former exists the little shortcoming of heat exchange area, and a little less than the exchange capability of heat, and nitration reaction strong exothermal reaction normally makes production capacity little, and reaction heat is difficult to remove, when serious even set off an explosion; The latter's complex structure, internal circulating load is less, and nitrated material mixed effect is unsatisfactory.
Publication number is that the Chinese patent of CN202590801U discloses a kind of nitration reaction still for CLT acid production, comprise reative cell, described reactor top and bottom are respectively equipped with material inlet and material outlet, vertically be provided with the shaft that is driven by power set in the described reative cell, described shaft is provided with double-deck aerofoil profile axial flow type stirrer, and described double-deck aerofoil profile axial flow type stirrer comprises upper strata aerofoil profile axial flow type stirrer and the lower floor's aerofoil profile axial flow type stirrer that is arranged at described shaft middle part and bottom respectively.This reactor is a kind of batch reactor.
Intermittently nitrated process is generally as follows: drip oleum configuration nitric-sulfuric acid system under the low temperature in the reactor that fuming nitric aicd is housed, then slowly add aromatic compound.When just beginning to drip oleum, the nitric acid quantity not sufficient is with the submergence paddle in the still sometimes, and material can not get abundant stirring, and flow condition is poor, and is undesirable with coil pipe, heat exchange jacket heat exchange effect, is unfavorable for controlling temperature.When adopting batch reactor to react, nitration reaction is carried out continuously, reaction efficiency is not high.
The utility model content
The utility model provides a kind of continuous nitrification system of automatic overflow, when adopting this continuous nitrification system to carry out nitration reaction, can realize carrying out continuously of nitration reaction, improves the efficient of nitration reaction.
A kind of continuous nitrification system of automatic overflow comprises at least three overflow nitrators of series connection successively;
Described overflow nitrator is provided with material inlet and overfall, and every overflow nitrator links to each other the material inlet of overfall with next overflow nitrator by pipeline.
In the utility model, many overflow nitrators are together in series, after nitration reaction is carried out in an overflow nitrator, enter again in next overflow nitrator and proceed nitration reaction, nitration reaction can be carried out successively continuously at each overflow nitrator, nitration product generates continuously, has improved the efficient of nitration reaction.
As preferably, the setting height(from bottom) of each overflow nitrator reduces successively according to the order of series connection, at this moment, under the effect of liquid at gravity that Shang Yitai overflow nitrator overfall flows out, flow to next overflow digester naturally.
As preferably, between two adjacent overflow nitrators, difference in height is 20～150cm, and this altitude range is conducive to control the flowing velocity of reaction mass between adjacent two overflow nitrators, flow velocity can be remained within the suitable scope, to be conducive to the generation of nitration reaction.
As preferably, described overflow nitrator comprises and has open-topped reative cell, and the loam cake that matches with described open top, and described loam cake has observation window, by the observation window of each overflow nitrator setting, the state of the reaction mass in the observing response chamber easily.
As preferably, the periphery of described reative cell has heat exchange jacket;
The heat exchange jacket bottom is provided with the heat transferring medium entrance, and top is provided with the heat transferring medium outlet, by feed heat transferring medium in the heat transferring medium entrance of heat exchange jacket, can control the reaction temperature of overflow nitrator, prevents the too high generation that causes side reaction of reaction temperature.
As preferably, every overflow nitrator is connected the heat transferring medium entrance by pipeline with the heat transferring medium outlet of next overflow nitrator, and it is more reasonable to adopt this kind connected mode that the pipeline of whole continuous nitrification system is connected, and saves shared space.
Compare the beneficial effects of the utility model with prior art:
(1) many overflow nitrators is connected into a system, nitration reaction is carried out in different reactors continuously, improve the efficient of nitration reaction;
(2) by regulating the difference in height between adjacent two overflow nitrators, can control preferably the flow velocity of the reaction mass between each overflow nitrator of flowing through;
(3) condenser system with each overflow nitrator is connected, and has saved the whole system occupation space.
Description of drawings
Fig. 1 is the structural representation of overflow nitrator of the continuous nitrification system of automatic overflow of the present utility model;
Fig. 2 is the structural representation of continuous nitrification of the present utility model system; Among the figure, 1: the overflow nitrator; 2: reative cell; 3: loam cake; 4: heat exchange jacket; 5: material inlet; 6: overfall.
The specific embodiment
Continuous nitrification system to automatic overflow of the present utility model is further described below in conjunction with accompanying drawing.
By the structural representation of as shown in Figure 1 overflow nitrator 1 as can be known, this overflow nitrator 1 comprises open-topped reative cell 2, is used for the heat exchange jacket 4 of closed reaction chamber's 2 open-topped loam cakes 3 and encapsulation reaction chamber 2 outer surfaces.
This overflow nitrator 1 also comprises agitating device, agitating device comprises shaft and drives the stirring motor of shaft, and at the centre of loam cake 3 opening and be provided with axle bed, stirring motor is fixed on the axle bed, the bottom of reative cell 2 is stretched in the lower end of shaft, in its lower end paddle is installed.
Side wall upper part at reative cell 2 offers overfall 6, below overfall 6, be provided with flow-stopping plate, the bottom of flow-stopping plate is welded in 10～15cm place, reative cell 2 inwall overfalls, 6 belows, extend obliquely upward, with the angle of vertical direction be 30～60 °, the top of flow-stopping plate exceeds the upper end 10～15cm of overfall 6.
Outer surface at reative cell 2 is enclosed with heat exchange jacket 4, and the heat transferring medium entrance is opened in the bottom of reative cell 2, and the top at reative cell 2 is opened in the heat transferring medium outlet.Condensed water enters heat exchange jacket 4 from the heat transferring medium entrance, leaves from the heat transferring medium outlet after the heat exchange.
In order further to accelerate the transfer of heat of nitration reaction, also be provided with heat exchange coil in reative cell 2 inside, correspondingly the sidewall at reative cell 2 offers coil pipe entrance and coil pipe outlet, wherein, the coil pipe entrance is opened in reative cell 2 bottoms, the coil pipe outlet is opened on reative cell 2 sidewalls, and the place all is provided with condensing water conduit at the coil pipe entrance and exit.
In order to observe the situation of nitrating pot internal reaction, on loam cake 3, also offer observation window.
By the structural representation of as shown in Figure 2 continuous nitrification system as can be known, this continuous nitrification system comprises three overflow nitrators 1 of series connection successively, every overflow nitrator 1 is provided with material inlet 5 and overfall 6, and every overflow nitrator 1 links to each other overfall 6 by pipeline with the material inlet 5 of next overflow nitrator 1.The setting height(from bottom) of these three overflow nitrators 1 reduces successively according to the order of series connection, wherein between adjacent two overflow nitrators 1, difference in height is 60cm, when adopting this difference in height, the flow velocity of reaction mass between two overflow nitrators 1 is proper, can be too not high can be too not low yet, just in time adapt with the speed of nitration reaction.
Every overflow nitrator 1 exports be connected (in figure do not draw) with the heat transferring medium entrance with the heat transferring medium of next overflow nitrator 1 by pipeline, when adopting this kind connected mode, heat transferring medium is opposite with the flow direction of reaction mass, whole heat exchange system and material are the adverse current state, at this moment, can improve heat exchange efficiency, and the chuck of each overflow nitrator 1 is connected, be conducive to save the space.
When carrying out nitration reaction, in heat exchange coil and heat exchange jacket 4, feed condensed water, from feed pipe reaction mass is sent into reative cell 2 bottoms of first overflow nitrator 1 then, under the stirring of paddle, nitration reaction takes place, along with the carrying out of reaction, constantly feed reaction mass, the material that reaction obtains rises from reative cell 2 bottoms, walks around flow-stopping plate, flows out from overfall 6; The reaction mass that flows out from overfall 6 enters second overflow nitrator 1 and proceeds reaction, and the motion process of reaction mass is identical with first reative cell 2 in this overflow nitrator 1, and reaction mass is from overfall 6 outflows of this overflow nitrator 1; The reaction mass that flows out from the overfall 6 of second overflow nitrator 1 enters the 3rd overflow nitrator 1 and reacts; By regulating the speed of the reaction mass that feeds in first overflow nitrator 1, can control the degree that reaction is carried out, feed reaction mass continuously, can realize carrying out continuously of nitration reaction.
The above-described specific embodiment has been described in detail the technical solution of the utility model and beneficial effect; be understood that the above only is most preferred embodiment of the present utility model; be not limited to the utility model; all any modifications of in principle scope of the present utility model, making, replenish and be equal to replacement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. the continuous nitrification system of an automatic overflow is characterized in that, comprises at least three overflow nitrators (1) of series connection successively;
Described overflow nitrator (1) is provided with material inlet (5) and overfall (6), and every overflow nitrator (1) links to each other overfall (6) by pipeline with the material inlet (5) of next overflow nitrator (1).
2. the continuous nitrification system of automatic overflow according to claim 1 is characterized in that, the setting height(from bottom) of each overflow nitrator (1) reduces successively according to the order of series connection.
3. the continuous nitrification system of automatic overflow according to claim 2 is characterized in that, between adjacent two overflow nitrators (1), difference in height is 20～150cm.
4. the continuous nitrification system of automatic overflow according to claim 3, it is characterized in that, described overflow nitrator (1) comprises and has open-topped reative cell (2), and the loam cake (3) that matches with described open top, and described loam cake (3) has observation window.
5. the continuous nitrification system of automatic overflow according to claim 4 is characterized in that, the periphery of described reative cell (2) has heat exchange jacket (4);
Heat exchange jacket (4) bottom is provided with the heat transferring medium entrance, and top is provided with the heat transferring medium outlet.
6. the continuous nitrification system of automatic overflow according to claim 5 is characterized in that, every overflow nitrator (1) is connected the heat transferring medium entrance by pipeline with the heat transferring medium outlet of next overflow nitrator (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320213629 CN203155229U (en) | 2013-04-24 | 2013-04-24 | Continuous nitration system with automatic overflow function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320213629 CN203155229U (en) | 2013-04-24 | 2013-04-24 | Continuous nitration system with automatic overflow function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203155229U true CN203155229U (en) | 2013-08-28 |
Family
ID=49016453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320213629 Expired - Lifetime CN203155229U (en) | 2013-04-24 | 2013-04-24 | Continuous nitration system with automatic overflow function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203155229U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933923A (en) * | 2014-04-30 | 2014-07-23 | 潘兆金 | Continuous reaction production line consisting of multiple serially connected reaction kettles |
| CN106824030A (en) * | 2017-02-08 | 2017-06-13 | 郑州高富肥料有限公司 | A kind of continuous reaction device |
| CN107537423A (en) * | 2017-08-09 | 2018-01-05 | 凯莱英生命科学技术(天津)有限公司 | Continuous still reaction device and n-BuLi participate in the continuous still reaction system of production |
| CN112500391A (en) * | 2020-12-14 | 2021-03-16 | 江西禾益化工股份有限公司 | Device and method for producing dithianon through continuous kettle type reaction |
| CN114225884A (en) * | 2021-12-29 | 2022-03-25 | 江苏吉华化工有限公司 | Continuous nitration reaction device |
-
2013
- 2013-04-24 CN CN 201320213629 patent/CN203155229U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933923A (en) * | 2014-04-30 | 2014-07-23 | 潘兆金 | Continuous reaction production line consisting of multiple serially connected reaction kettles |
| CN106824030A (en) * | 2017-02-08 | 2017-06-13 | 郑州高富肥料有限公司 | A kind of continuous reaction device |
| CN106824030B (en) * | 2017-02-08 | 2019-11-15 | 郑州高富肥料有限公司 | A kind of continuous reaction device |
| CN107537423A (en) * | 2017-08-09 | 2018-01-05 | 凯莱英生命科学技术(天津)有限公司 | Continuous still reaction device and n-BuLi participate in the continuous still reaction system of production |
| CN112500391A (en) * | 2020-12-14 | 2021-03-16 | 江西禾益化工股份有限公司 | Device and method for producing dithianon through continuous kettle type reaction |
| CN114225884A (en) * | 2021-12-29 | 2022-03-25 | 江苏吉华化工有限公司 | Continuous nitration reaction device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203155229U (en) | Continuous nitration system with automatic overflow function | |
| CN100369885C (en) | Process for continuous preparing diruitro methylbenzele and apparatus thereof | |
| CN105597651A (en) | Continuous reactor for nitromethane | |
| CN107011174B (en) | A method of m-nitroacetophenone is prepared based on microreactor | |
| CN205127947U (en) | Gas, liquid phase reaction crystallizer | |
| CN101735019B (en) | Process for producing resorcinol by continuously hydrolyzing m-phenylenediamine | |
| CN107185476B (en) | Multi-stage, multi-functional injection reactor system and method of operating the same | |
| CN106281727B (en) | A kind of novel ester exchange reaction device | |
| CN102276470A (en) | Method for nitrifying aromatic hydrocarbon compound by continuous countercurrent | |
| CN201330250Y (en) | Gas lift type circulating compound fermenting reactor | |
| CN203155228U (en) | Nitrating pot with automatic overflow function | |
| CN106732290A (en) | A kind of reactor of continuous production nitromethane | |
| CN202044945U (en) | Tower type reactor for nitric acid oxidation reaction | |
| CN103922898B (en) | A kind of Resorcinol continuous crystallisation technique | |
| CN107837781B (en) | Reaction kettle for strong exothermic reaction | |
| CN203389641U (en) | Acetonitrile reactor structure | |
| CN202387465U (en) | Large adipic acid reactor | |
| CN113694858B (en) | Continuous nitration reaction device and method for benzene ring nitration | |
| CN217450115U (en) | Production system of 8-chloro-6-oxo-ethyl octanoate | |
| CN201239625Y (en) | Novel nitrator | |
| CN204320318U (en) | A kind of gas phase sulfur trioxide sulfonating toluene prepares the sulfonation equipment of p-methyl benzenesulfonic acid | |
| CN110038498B (en) | Continuous reactor and use method thereof | |
| CN215783355U (en) | Device for continuously producing hydroxyl acetonitrile by using liquid-phase hydrocyanic acid | |
| CN210620664U (en) | Continuous production equipment for 5-nitro salicylic acid | |
| CN217774136U (en) | Continuous synthesis system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |