CN214681667U

CN214681667U - Chlorine chlorination device

Info

Publication number: CN214681667U
Application number: CN202120729520.1U
Authority: CN
Inventors: 王振; 陈崇春; 赵致如; 王肖
Original assignee: Liaoning Hongfeng Technology Co ltd
Current assignee: Liaoning Hongfeng Technology Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-11-12
Anticipated expiration: 2031-04-12

Abstract

The utility model discloses a chlorine chlorination device for the synthetic one-step chlorine chlorination of medical intermediate 2-chlorine 2-chloromethyl-4-cyano butyraldehyde. Including the chlorination reation kettle who is equipped with the clamp cover and with first freezing salt solution inlet tube and the first freezing salt solution wet return of chlorination reation kettle clamp cover intercommunication, set up three leaf impulse type agitators in the reation kettle, still include external condenser and external circulating pump, set up the freezing salt solution inlet tube of second and the freezing salt solution wet return of second on the external condenser, external condenser top and reation kettle top pipeline intercommunication, the pipeline intercommunication is passed through with the external circulating pump entry in the reation kettle bottom, the external circulating pump export communicates with external condenser bottom. The heat exchange area can be increased, the heat exchange rate is increased, the chlorine introducing rate is accelerated, the reaction period is shortened, the uniformity of materials is ensured, the sufficient heat transfer of the materials is ensured, the risk of temperature runaway is avoided, the accident is prevented, and the reaction yield is ensured.

Description

Chlorine chlorination device

Technical Field

The utility model relates to an use chlorine to carry out chlorination reaction technical field, in particular to synthetic one step's of medicine midbody 2-chlorine 2-chloromethyl-4-cyano butyraldehyde chlorine chlorination device.

Background

The one-step traditional chlorine chlorination device for synthesizing the medical intermediate 2-chloro-2-chloromethyl-4-cyanobutyraldehyde adopts a reaction kettle with a jacket filled with saline water, the reaction kettle has a small heat exchange area, and a flash temperature is easy to generate to cause a material flushing accident due to the small heat exchange area; the reaction kettle adopts an anchor stirrer, and the effect of mixing mass transfer and heat transfer is poor; the small equipment capacity results in a large number of equipment and long chlorination cycle; the reaction time is long due to instability of the reactants, resulting in low yield. Although residual chlorine can not fully participate in the reaction, the residual chlorine can continue to react to cause the back suction of materials, corrode equipment such as pipelines and valves and cause the leakage accident of the chlorine.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a chlorine chlorination device that heat transfer area is big, equipment cover is few, chlorination cycle is short and the productivity is big.

The utility model adopts the technical proposal that: the utility model provides a chlorine chlorination device, including be equipped with the chlorination reation kettle who presss from both sides the cover and with first freezing salt solution inlet tube and the first freezing salt solution wet return of chlorination reation kettle jacket intercommunication, set up the agitator in the reation kettle, still include external condenser and outer circulating pump, set up freezing salt solution inlet tube of second and the freezing salt solution wet return of second on the external condenser, external condenser top and reation kettle top pipeline intercommunication, the reation kettle bottom passes through the pipeline intercommunication with the outer circulating pump entry, the outer circulating pump export communicates bottom the external condenser.

The utility model relates to a preferred embodiment is, set up the chlorine intake pipe and the chlorine ooff valve of introducing chlorine and introduce nitrogen gas intake pipe and the nitrogen gas ooff valve of nitrogen gas on the pipeline of chlorination reation kettle and external circulating pump intercommunication.

The utility model relates to a preferred embodiment is, the agitator is three leaf impulse type agitators, sets up in chlorination reaction kettle bottom.

The utility model relates to a preferred embodiment is, chlorination reaction kettle's material is enamel, graphite or chlorine-resistant stainless steel.

The utility model discloses a preferred embodiment is, the material of outer circulating pump is cast steel inside lining fluorine or lining enamel composite.

The utility model relates to a preferred embodiment is, external heat exchanger's material is enamel, graphite or chlorine-resistant stainless steel.

The utility model has the advantages that: the adoption presss from both sides the cooling of cover chlorination reation kettle, has increased outer circulating pump and external condenser, sets up external condenser and can increase heat transfer area and improve heat transfer rate, thereby also accelerated to lead to chlorine speed and shortened reaction cycle, can also reduce equipment set number. The stirring stirrer of the chlorination reaction kettle is replaced by a three-blade push type stirrer from an anchor type stirrer, so that the mass and heat transfer effects of mixing can be enhanced. The external circulating pump is arranged to fully mix the materials, so that the materials are ensured to be uniform, the materials are rapidly output and fully transfer heat, the risk of temperature runaway is avoided, accidents can be prevented, and the reaction yield is ensured.

Drawings

Fig. 1 is a schematic diagram of a chlorine chlorination apparatus according to an embodiment of the present invention.

The reference numbers in the figures denote: the device comprises a chlorination reaction kettle 1, an external circulating pump 2, an external condenser 3, a chlorine gas inlet pipe 4, a stirrer 5, a nitrogen gas inlet pipe 6, a nitrogen gas switch valve 8, a chlorine gas switch valve 9, a jacket 11, a first frozen brine inlet pipe 12, a first frozen brine return pipe 13, a second frozen brine inlet pipe 31 and a second frozen brine return pipe 32.

Detailed Description

In order to make the technical solutions of the present invention clearer and clearer for those skilled in the art, the present invention will be described in further detail with reference to the following embodiments and drawings, but the embodiments of the present invention are not limited thereto.

Referring to fig. 1, the chlorine chlorination device comprises a chlorination reactor 1 provided with a jacket 11, a stirrer 5 is arranged at the bottom of the chlorination reactor, the stirrer can be a three-blade propeller stirrer, and the stirring form is changed from anchor stirring to the three-blade propeller stirrer 5, so that the mixing mass transfer and heat transfer effects can be enhanced. The first frozen brine inlet pipe 12 and the first frozen brine return pipe 13 are communicated with a chlorination reactor jacket, and the chlorination reactor can be made of enamel, graphite or chlorine-resistant stainless steel materials.

In the embodiment, the heat exchanger further comprises an external condenser 3 and an external circulating pump 2, the external heat exchanger is made of enamel, graphite or chlorine-resistant stainless steel, and the external circulating pump is made of a composite material with fluorine lining or enamel lining inside cast steel. Set up the freezing salt solution inlet tube of second 31 and the freezing salt solution wet return of second 32 on the external condenser, 3 tops of external condenser and 1 top pipeline intercommunications of chlorination reation kettle, and pipeline intercommunication is passed through with 2 entrys of external circulating pump in reation kettle 1 bottom, and the external circulating pump export communicates bottom the external condenser.

In this embodiment, a chlorine gas inlet pipe 4 and a chlorine gas switch valve 9 for introducing chlorine gas, and a nitrogen gas inlet pipe 6 and a nitrogen gas switch valve 8 for introducing nitrogen gas are provided on a pipeline communicating the reaction kettle and the external circulation pump. The nitrogen switch valve 8 and the chlorine switch valve 9 can be interlocked as required, and when the nitrogen cut-off valve is automatically opened, the nitrogen is blown to clean the chlorine for a certain time, and then the nitrogen cut-off valve is automatically closed. When chlorine introduction is finished or the chlorine introduction is temporarily required to be suspended, the chlorine shut-off valve is automatically closed, and when the nitrogen is filled for a certain time, the nitrogen shut-off valve is automatically closed. At the moment, the chlorine gas completely enters the material, so that the full reaction of the chlorine gas is ensured, and the phenomenon of back suction is avoided, so that the condition of corroding pipelines, valves or equipment is avoided, and the chlorine gas is prevented from leaking to avoid safety accidents.

Because of the external condenser 3, the heat exchange area is increased, the heat exchange speed is increased, the chlorine introducing speed is accelerated, the reaction period is shortened, the number of equipment is reduced, and the space is saved. Because of establishing external circulating pump 2, not only make the material intensive mixing, guaranteed that the material is even, make the material export fast again, guaranteed the material and fully conducted heat, avoided the risk of flying to warm, prevented the accident and taken place, guaranteed the reaction yield.

The above description is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can replace or change the technical solution and the concept of the present invention within the scope of the present invention.

Claims

1. The utility model provides a chlorine chlorination device, including chlorination reation kettle (1) that is equipped with clamp cover (11) and with first freezing salt solution inlet tube (12) and first freezing salt solution wet return (13) that chlorination reation kettle presss from both sides the cover intercommunication, set up agitator (5) in the reation kettle, a serial communication port, still include external condenser (3) and external circulating pump (2), set up second freezing salt solution inlet tube (31) and second freezing salt solution wet return (32) on the external condenser, external condenser (3) top and reation kettle (1) top pipeline intercommunication, reation kettle (1) bottom passes through the pipeline intercommunication with external circulating pump (2) entry, the external circulating pump export communicates bottom with external condenser.

2. The chlorine chlorination device according to claim 1, wherein a chlorine gas inlet pipe (4) and a chlorine gas on-off valve (9) for introducing chlorine gas, and a nitrogen gas inlet pipe (6) and a nitrogen gas on-off valve (8) for introducing nitrogen gas are provided on a pipeline for communicating the chlorination reactor and the external circulation pump.

3. The chlorine chlorination device according to claim 2, wherein the stirrer (5) is a three-blade propeller stirrer and is arranged at the bottom of the chlorination reactor.

4. The chlorine chlorination device of claim 3, wherein the chlorination reactor is made of enamel, graphite or chlorine-resistant stainless steel.

5. The chlorine chlorination plant of claim 3 wherein the outer circulation pump is a cast steel inner fluorine-lined or enamel-lined composite.

6. The chlorine chlorination device of claim 3, wherein the external heat exchanger is made of enamel, graphite or chlorine-resistant stainless steel.