CN214973827U

CN214973827U - Ethoxylation reaction system

Info

Publication number: CN214973827U
Application number: CN202120583661.7U
Authority: CN
Inventors: 赵志新
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-12-03
Anticipated expiration: 2031-03-18

Abstract

The utility model relates to an ethoxylation reaction system, its characteristics lie in including the retort, circulation heat transfer subassembly, the atomizing spray subassembly, the tee bend switching-over valve, the first material circulation inlet pipe of retort, retort second material circulation inlet pipe, the vacuum tank, the vacuum pipeline, be equipped with reaction chamber on the retort, circulation heat transfer subassembly includes circulating line, the circulating pump, the heat exchanger, circulating line is linked together with reaction chamber, the circulating pump concatenates on circulating line with the heat exchanger, the atomizing spray subassembly sets up in reaction chamber, the both ends of the first material circulation inlet pipe of retort respectively with tee bend switching-over valve, reaction chamber is linked together, the both ends of retort second material circulation inlet pipe respectively with tee bend switching-over valve, the atomizing spray subassembly, the vacuum tank is linked together through vacuum pipeline and retort. The utility model has the advantages of simple structure, high reliability, sufficient dehydration, stable performance, strong applicability and the like, and can effectively improve the production quality of related products.

Description

Ethoxylation reaction system

Technical Field

The utility model relates to a chemical industry equipment field, especially an ethoxylation reaction system.

Background

At present, before ethoxylation reaction, the initiator is required to be subjected to temperature rise dehydration treatment. The conventional temperature-rising dehydration treatment is completed by a reaction tank, a heat exchanger, a vacuum pipeline, a vacuum tank, an atomizing nozzle assembly and the like. The connection relationship of the devices is as follows: the atomization spray head assembly is arranged in the reaction tank, the input end and the output end of the heat exchanger pipeline are respectively communicated with the reaction tank and the atomization spray head assembly, and the input end and the output end of the vacuum pipeline are respectively communicated with the reaction tank and the vacuum tank. In the temperature rise dehydration process, the initiator is heated through the heat exchanger, moisture is evaporated out of the static initiator in the reaction tank under the action of vacuum and is pumped out to the vacuum tank for storage, the initiator passes through the atomizing nozzle assembly to be circularly heated and dehydrated in the vacuum state of the reaction system, the atomized initiator is easily sucked into the vacuum tank, no initiator material is idle rotated in the circulating pump body connected with the heat exchanger in series, the damage is caused, and the raw material ratio in the reaction tank is unbalanced. And because the input end of the circulation heat exchange pipeline is mostly connected to the bottom of the reaction tank, atomized raw materials are difficult to be sucked by the circulation heat exchange pipeline for circulation heat exchange dehydration again, and in addition, the fluidity of the initiator at the corners of the reaction tank is poor, so that dead angles can occur due to the fact that part of the initiator can not circulate, and therefore the moisture content of the initiator in the reaction tank exceeds the standard with the oxygen content in the reaction tank, further the reaction speed is slow and the polyethylene glycol exceeds the standard in the reaction process, and finally the product quality is unqualified. Therefore, it is necessary to redesign the structure of the ethoxylation reaction system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem and not enough, provide an ethoxylation reaction system, this ethoxylation reaction system has advantages such as simple structure, reliability height, dehydration are abundant, stable performance, suitability are strong, and it can improve the production quality of relevant product effectively.

The technical scheme of the utility model is realized like this:

the utility model provides an ethoxylation reaction system, its characteristics are in including retort, circulation heat transfer subassembly, atomizing spray subassembly, three-way switching-over valve, the first material circulation inlet pipe of retort, retort second material circulation inlet pipe, vacuum tank, vacuum pipeline, wherein set up the reaction inner chamber on the retort, circulation heat transfer subassembly includes circulating line, circulating pump, heat exchanger, the bottom at the retort is connected to the one end of circulating line to make the lower extreme of circulating line and reaction inner chamber be linked together, the circulating pump concatenates on the circulating line with the heat exchanger, atomizing spray subassembly sets up in reaction inner chamber, be equipped with an input port, two output ports on the three-way switching-over valve, the input port of three-way switching-over valve and the other end of circulating line connect the intercommunication mutually, the both ends of the first material circulation inlet pipe of retort respectively with one of them output port of three-way switching-over valve, one of them output port of three-way switching-over valve, The reaction inner chamber is communicated, two ends of a second material circulation inlet pipeline of the reaction tank are respectively communicated with the other output port of the three-way reversing valve and the input end of the atomization spraying assembly, the vacuum tank is communicated with the reaction tank through a vacuum pipeline, the joint of the vacuum pipeline and the reaction tank is positioned on the top surface of the reaction tank, the vacuum pipeline is also communicated with the upper end of the reaction inner chamber, the top surface of the reaction tank is respectively provided with a feeding pipeline, a venting pipeline and a nitrogen pipeline, and the feeding pipeline, the venting pipeline and the nitrogen pipeline are all communicated with the upper end of the reaction inner chamber.

The utility model has the advantages that: in the ethoxylation reaction system, the communication mode of the pipelines can be changed by arranging the three-way reversing valve, for example, the circulation pipeline can be communicated with a first material circulation inlet pipeline of the reaction tank, or the circulation pipeline can be communicated with a second material circulation inlet pipeline of the reaction tank. When circulating line is linked together with the first material circulation inlet pipe of retort, can carry out the dehydration of heating up, at this moment from the initiator of the first material circulation inlet pipe output of retort in directly discharging into the reaction inner chamber, the initiator can not pass through atomizing spray set, just can not produce atomizing initiator like this in the reaction inner chamber to just can avoid the initiator of reaction inner chamber to be siphoned away by the vacuum tank. And the liquid initiator that the first material circulation of retort import pipeline flows back can reach the purpose of the initiator in the impact reaction inner chamber to make the better circulation of the liquid initiator in the reaction inner chamber get up, avoid appearing the condition at dead angle, thereby just can reach better dehydration, and then help improving the production quality of relevant product, this ethoxylation reaction system's wholeness can be very stable, reliable. When the circulating pipeline is communicated with the second material circulating inlet pipeline of the reaction tank, the initiator is introduced to the atomizing spray assembly to meet the atomizing effect requirement. This can well meet the requirements of ethoxylation, thereby facilitating the preparation of high quality products. The reliability of the ethoxylation reaction system is improved. Through making feeding pipeline, blow-down pipeline, nitrogen gas pipeline all with the upper end of reaction inner chamber, can avoid the liquid reaction material in the reaction inner chamber to enter into feeding pipeline, blow-down pipeline, nitrogen gas pipeline like this to can guarantee the accuracy and the stability of reaction, this ethoxylation reaction system's reliability is very high. The feeding pipeline is arranged, so that the feeding pipeline can be used for adding raw materials. Through the setting of unloading the pipeline, can reach safety protection's effect. Through the setting of nitrogen gas pipeline, can conveniently let in nitrogen gas to can reduce the oxidation or play other safety protection effects. This helps to improve the applicability of the ethoxylation system. Meanwhile, the overall structure of the ethoxylation reaction system is very simple, and the ethoxylation reaction system is very convenient to manufacture.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 1, the ethoxylation reaction system of the present invention comprises a reaction tank 1, a circulation heat exchange assembly 2, an atomization spray assembly 3, a three-way reversing valve 4, a first material circulation inlet pipeline 5 of the reaction tank, a second material circulation inlet pipeline 6 of the reaction tank, a vacuum tank 7 and a vacuum pipeline 8, wherein the reaction tank 1 is provided with a reaction inner cavity 11, the circulation heat exchange assembly 2 comprises a circulation pipeline 21, a circulation pump 22 and a heat exchanger 23, one end of the circulation pipeline 21 is connected to the bottom of the reaction tank 1 and communicates the circulation pipeline 21 with the lower end of the reaction inner cavity 11, the circulation pump 22 and the heat exchanger 23 are connected in series on the circulation pipeline 21, the atomization spray assembly 3 is arranged in the reaction inner cavity 11, the three-way reversing valve 4 is provided with an input port 41, two

output ports

42A and 42B, the input port 41 of the three-way reversing valve 4 is communicated with the other end of the circulation pipeline 21, the two ends of the first material circulation inlet pipeline 5 of the reaction tank are respectively communicated with one of the output ports 42A and the reaction inner cavity 11 of the three-way reversing valve 4, the two ends of the second material circulation inlet pipeline 6 of the reaction tank are respectively communicated with the other output port 42B of the three-way reversing valve 4 and the input end of the atomization spraying component 3, the vacuum tank 7 is communicated with the reaction tank 1 through the vacuum pipeline 8, the joint of the vacuum pipeline 8 and the reaction tank 1 is located on the top surface of the reaction tank 1, the vacuum pipeline 8 is also communicated with the upper end of the reaction inner cavity 11, the top surface of the reaction tank 1 is further respectively provided with a material inlet pipeline 12, a vent pipeline 13 and a nitrogen pipeline 14, and the material inlet pipeline 12, the vent pipeline 13 and the nitrogen pipeline 14 are all communicated with the upper end of the reaction inner cavity 11 and are controlled by valves.

In the ethoxylation reaction system, the communication mode of the pipelines can be changed by arranging the three-way reversing valve 4, for example, the circulation pipeline 21 can be communicated with the first material circulation inlet pipeline 5 of the reaction tank, or the circulation pipeline 21 can be communicated with the second material circulation inlet pipeline 6 of the reaction tank. When the circulating pipeline 21 is communicated with the first material circulating inlet pipeline 5 of the reaction tank, the temperature rise dehydration treatment can be carried out, at the moment, the initiator output from the first material circulating inlet pipeline 5 of the reaction tank is directly discharged into the reaction inner cavity 11, and the initiator cannot pass through the atomization spraying assembly 3, so that the atomized initiator cannot be generated in the reaction inner cavity 11, and the initiator in the reaction inner cavity 11 can be prevented from being sucked into the vacuum tank 7 in a vacuum state. And the liquid initiator that the first material circulation inlet pipe of retort 5 flows back to can reach the purpose of the initiator in the impact reaction inner chamber 11 to make the better circulation of the liquid initiator in the reaction inner chamber 11 get up, avoid appearing the condition at dead angle, thereby just can reach better dehydration, and then help improving the production quality of relevant product, this ethoxylation reaction system's wholeness can be very stable, reliable.

When the circulating pipeline 21 is communicated with the second material circulating inlet pipeline 6 of the reaction tank, the initiator is introduced to the atomizing spray component 3 to meet the requirement of atomizing effect. This can well meet the requirements of ethoxylation, thereby facilitating the preparation of high quality products.

The vacuum pipe 8 is connected to the top surface of the reaction tank 1, and the vacuum pipe 8 is connected to the upper end of the reaction chamber 11. This effectively prevents the liquid initiator in the reaction tank 1 from entering the vacuum line 8 and the vacuum tank 7, which contributes to the improvement of the reliability of the ethoxylation system.

Through making pan feeding pipeline 12, blow-down pipeline 13, nitrogen gas pipeline 14 all be linked together and by valve control with the upper end of reaction inner chamber 11, can avoid the liquid starting agent in the reaction inner chamber 11 to enter into pan feeding pipeline 12, blow-down pipeline 13, nitrogen gas pipeline 14 like this to can guarantee the accuracy and the stability of reaction, this ethoxylation system's reliability is very high.

Through the arrangement of the feeding pipeline 12, the raw materials can be added. Through the setting of unloading pipeline 13, can reach the effect of safety protection. By providing the nitrogen gas line 14, nitrogen gas can be conveniently introduced, thereby reducing oxidation or performing other functions. This helps to improve the applicability of the ethoxylation system.

Meanwhile, the overall structure of the ethoxylation reaction system is very simple, and the ethoxylation reaction system is very convenient to manufacture.

When the ethoxylation reaction system is used, the working state of the ethoxylation reaction system can be switched through the three-way reversing valve 4. When the temperature rise dehydration is needed, the circulating pipeline 21 is communicated with the first material circulating inlet pipeline 5 of the reaction tank through the three-way reversing valve 4, so that the initiator is prevented from being atomized by the atomizing spray assembly 3. And the vacuum tank 7 is simultaneously brought into a vacuum state during dehydration at elevated temperature. The water vapor and other unwanted components thus removed from the starting material are quickly sucked into the vacuum tank 7, so that the dewatering effect is well achieved. When the ethoxylation reaction is needed, the circulating pipeline 21 is communicated with the circulating inlet pipeline 6 of the second material of the reaction tank through the three-way reversing valve 4, so that the initiator can pass through the atomization spraying component 3, and the good reaction speed and quality requirements can be met. This ethoxylation reaction system just can satisfy the demand of in-service use well like this, this ethoxylation reaction system's suitability is very good.

The output end of the first material circulation inlet pipeline 5 of the reaction tank is higher than the bottom surface of the reaction inner cavity 11. To avoid the occurrence of backflow.

In actual use, the feed conduit 12 may be used for ethylene oxide transport.

The three-way reversing valve 4 is an L-shaped three-way ball valve. The structure is very simple, and the requirement of practical use can be well met.

In the actual manufacturing process, a safety vent valve (not shown) is connected in series with the vent pipe 13. Thus, the functions of pressure control and safety protection can be achieved.

As shown in fig. 1, the vacuum tank 7 is connected with a vacuum pump 9. This enables a vacuum to be achieved in the vacuum tank 7. The vacuum tank 7 is used for pumping away water vapor and other gases dehydrated from the initiator so that all indexes in the reaction tank 1 can better reach required values, and therefore the reaction quality can be improved conveniently.

Claims

1. An ethoxylation reaction system which characterized in that: comprises a reaction tank (1), a circulating heat exchange assembly (2), an atomization spray assembly (3), a three-way reversing valve (4), a first material circulating inlet pipeline (5) of the reaction tank, a second material circulating inlet pipeline (6) of the reaction tank, a vacuum tank (7) and a vacuum pipeline (8), wherein

A reaction inner cavity (11) is arranged on the reaction tank (1),

the circulating heat exchange assembly (2) comprises a circulating pipeline (21), a circulating pump (22) and a heat exchanger (23), one end of the circulating pipeline (21) is connected to the bottom of the reaction tank (1) and the circulating pipeline (21) is communicated with the lower end of the reaction inner cavity (11), the circulating pump (22) and the heat exchanger (23) are connected in series on the circulating pipeline (21),

the atomization spray component (3) is arranged in the reaction inner cavity (11),

the three-way reversing valve (4) is provided with an input port (41) and two output ports (42A, 42B), the input port (41) of the three-way reversing valve (4) is in butt joint communication with the other end of the circulating pipeline (21),

two ends of a first material circulating inlet pipeline (5) of the reaction tank are respectively communicated with one output port (42A) of the three-way reversing valve (4) and the reaction inner cavity (11),

two ends of the second material circulating inlet pipeline (6) of the reaction tank are respectively communicated with the other output port (42B) of the three-way reversing valve (4) and the input end of the atomization spraying component (3),

the vacuum tank (7) is communicated with the reaction tank (1) through a vacuum pipeline (8), the joint of the vacuum pipeline (8) and the reaction tank (1) is positioned on the top surface of the reaction tank (1), the vacuum pipeline (8) is communicated with the upper end of the reaction inner cavity (11),

the top surface of the reaction tank (1) is also respectively provided with a feeding pipeline (12), a vent pipeline (13) and a nitrogen pipeline (14), and the feeding pipeline (12), the vent pipeline (13) and the nitrogen pipeline (14) are all communicated with the upper end of the reaction inner cavity (11).