CN216137217U

CN216137217U - Gas temperature homogenizing device for hydrogenation reaction in hydrogen peroxide production

Info

Publication number: CN216137217U
Application number: CN202121237379.XU
Authority: CN
Inventors: 束长军
Original assignee: Shanghai Shuangbao Machinery Group Co ltd
Current assignee: Shanghai Shuangbao Machinery Group Co ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2022-03-29
Anticipated expiration: 2031-06-03

Abstract

The utility model discloses a gas temperature homogenizing device for hydrogenation reaction in hydrogen peroxide production, which is matched with a hydrogenation reactor for use, and comprises a barrel, a stirring motor, a rotating shaft and stirring blades, wherein the rotating shaft is positioned at the central axis inside the hydrogenation reactor, the lower end of the rotating shaft is rotatably arranged at the bottom inside the hydrogenation reactor, the upper end of the rotating shaft penetrates through the hydrogenation reactor and is connected with the stirring motor, a plurality of groups of stirring blades are arranged outside the rotating shaft, the barrel is sleeved outside the rotating shaft and the stirring blades, the outside of the barrel is fixed on the inner side wall of the hydrogenation reactor through a connecting piece, a plurality of through holes are formed in the bottom of the barrel, and a breathable waterproof film is arranged in the through holes. The method ensures that the reaction gas in the hydrogenation reactor circularly flows, ensures the temperature uniformity of the reaction gas in the hydrogenation reactor, and improves the heat transfer efficiency in the reaction process.

Description

Gas temperature homogenizing device for hydrogenation reaction in hydrogen peroxide production

Technical Field

The utility model relates to the technical field of hydrogen peroxide production equipment, in particular to a gas temperature homogenizing device for hydrogenation reaction in hydrogen peroxide production.

Background

Hydrogen peroxide, also known as hydrogen peroxide, is an important organic chemical raw material and a fine chemical product, and is widely applied to the fields of chemical synthesis, bleaching of paper pulp, paper and textiles, metal mineral treatment, environmental protection, electronics, military industry, aerospace and the like. There are various methods for producing hydrogen peroxide, including an electrolytic method, an isopropanol method, a direct hydrogen-oxygen synthesis method, an anthraquinone method, etc., among which the anthraquinone method is most widely used.

A hydrogenation reactor is used in the process of producing hydrogen peroxide by an anthraquinone method for hydrogenation reaction, the structure of the existing hydrogenation reactor is shown in figure 1, and the existing hydrogenation reactor comprises a tower body 1', a working solution inlet pipe 2', a hydrogen inlet pipe 3', a distribution tray 4', a solidified fluidized bed 5', a heat exchange pipe 6' and an outlet collector 7', when in work, firstly, 2-ethyl anthraquinone is used as a working carrier, aromatic hydrocarbon, trioctyl phosphate or 2-methyl cyclohexyl acetate is used as a solvent to prepare working solution according to a certain proportion, the working solution is added into the tower body 1' through the working solution inlet pipe 2', then, hydrogen is uniformly added into the tower body 1' through the hydrogen inlet pipe 3 'and the distribution tray 4', the temperature in the tower body 1 'is controlled by the heat exchange pipe 6', the working solution enters the solidified fluidized bed 5', under a certain temperature, pressure and the catalytic action of a catalyst in the solidified fluidized bed 5', which is hydrogenated with hydrogen to produce a hydrogenated liquid.

In the structure, the reaction temperature in the tower body is uneven, the phenomenon of overhigh local reaction temperature is easy to occur, the product quality is unstable, and the production efficiency of the product is lower.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the background art, the utility model provides a gas temperature homogenizing device for hydrogen peroxide production hydrogenation, which enables reaction gas in a hydrogenation reactor to flow circularly, ensures the temperature uniformity of the reaction gas in the hydrogenation reactor, and improves the heat transfer efficiency in the reaction process.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a gas temperature homogenizing device for hydrogenation reaction in hydrogen peroxide production, which is matched with a hydrogenation reactor for use, and comprises a cylinder, a stirring motor, a rotating shaft and stirring blades, wherein the rotating shaft is positioned at the central axis in the hydrogenation reactor, the lower end of the rotating shaft is rotatably arranged at the bottom in the hydrogenation reactor, the upper end of the rotating shaft penetrates through the hydrogenation reactor and is connected with the stirring motor, a plurality of groups of stirring blades are arranged on the outer side of the rotating shaft, the cylinder is sleeved on the outer sides of the rotating shaft and the stirring blades, the outer side of the cylinder is fixed on the inner side wall of the hydrogenation reactor through a connecting piece, a plurality of through holes are formed in the bottom of the cylinder, and a breathable waterproof film is arranged in the through holes.

The further improvement lies in that a plurality of vertically arranged heating assemblies are uniformly distributed on the inner side wall of the hydrogenation reactor along the circumference. Through setting up heating element, realized evenly fully heating hydrogenation reactor inside gas and working solution.

In a further improvement, the heating assembly is a plate heater.

The further improvement is that the hydrogenation reactor is provided with a working liquid inlet end and a hydrogen inlet end, and the working liquid inlet end is communicated with the inside of the cylinder body through a liquid inlet pipe. During operation, the working solution passes through inside the feed liquor pipe input to the barrel, can keep apart working solution and outside heating element, has improved the safety in utilization of device.

The further improvement is that temperature sensors are arranged on the top in the hydrogenation reactor and the inner side wall of the hydrogenation reactor. Can detect the inside each regional difference in temperature of hydrogenation reactor in real time through temperature sensor, and feed back the testing result to the PLC controller, the rotational speed of agitator motor is adjusted according to the difference in temperature data of feedback to the PLC controller, if each regional difference in temperature is great, then increase agitator motor's rotational speed, at this moment, stirring vane induced drafts the effect and strengthens, the inside gas of hydrogenation reactor can fast cycle flow get up, inside reaction gas temperature homogeneity has been guaranteed, the heat transfer efficiency among the reaction sequence has been improved, through the aforesaid adjustment, can control the inside each regional gas difference in temperature of hydrogenation reactor within 3 ℃.

The further improvement is that the upper part and the lower part of the inner side wall of the hydrogenation reactor are respectively provided with a temperature sensor.

The further improvement is that the bottom of the hydrogenation reactor is provided with a reaction liquid outlet end, and the top of the hydrogenation reactor is provided with a hydrogen outlet end. After the working solution and the hydrogen are fully reacted, the hydrogen can be directly discharged from a hydrogen outlet end at the top of the hydrogenation reactor, and the hydrogenated liquid obtained after the reaction is discharged from a reaction liquid outlet end at the bottom of the hydrogenation reactor, so that gas-liquid separation is realized.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the cylinder body is arranged outside the rotating shaft and the stirring blades, on one hand, the working liquid in the cylinder body can be isolated from an external heating component, so that the use safety of the device is improved, on the other hand, the effect of air suction is achieved under the action of the stirring motor, the rotating shaft and the stirring blades, the gas in the hydrogenation reactor moves from top to bottom, the gas at the lower part in the hydrogenation reactor is pumped into the cylinder body through the breathable waterproof film at the bottom of the cylinder body, the hydrogen in the gas is fully contacted with the working liquid and is mixed with the working liquid to react, so that the gas in the hydrogenation reactor flows circularly, the temperature uniformity of the internal reaction gas is ensured, and the heat transfer efficiency in the reaction process is improved.

Drawings

The utility model is described in further detail below with reference to specific embodiments and with reference to the following drawings.

FIG. 1 is a schematic diagram of a hydrogenation reactor according to the prior art;

FIG. 2 is a schematic structural diagram of the gas temperature homogenizing device of the present invention in cooperation with a hydrogenation reactor;

wherein, the specific reference numbers are: the device comprises a tower body 1', a working solution inlet pipe 2', a hydrogen inlet pipe 3', a distribution tray 4', a solidified fluidized bed 5', a heat exchange pipe 6', an outlet collector 7', a hydrogenation reactor 1, a cylinder body 2, a stirring motor 3, a rotating shaft 4, stirring blades 5, a heating assembly 6, a working solution inlet end 7, a liquid inlet pipe 8, a hydrogen inlet end 9, a temperature sensor 10, a reaction solution outlet end 11 and a hydrogen outlet end 12.

Detailed Description

The embodiment of the utility model discloses a gas temperature homogenizing device for hydrogenation reaction in hydrogen peroxide production, as shown in figure 2, the gas temperature homogenizing device is matched with a hydrogenation reactor 1 for use, the gas temperature homogenizing device comprises a cylinder body 2, a stirring motor 3, a rotating shaft 4 and stirring blades 5, the rotating shaft 4 is positioned at the central axis in the hydrogenation reactor 1, the lower end of the rotating shaft 4 is rotatably arranged at the bottom in the hydrogenation reactor 1, the upper end of the rotating shaft 4 penetrates through the hydrogenation reactor 1 and is connected with the stirring motor 3, a plurality of groups of stirring blades 5 are arranged on the outer side of the rotating shaft 4, the cylinder body 2 is sleeved on the outer sides of the rotating shaft 4 and the stirring blades 5, the outer side of the cylinder body 2 is fixed on the inner side wall of the hydrogenation reactor 1 through a connecting piece, a plurality of through holes are formed in the bottom of the cylinder body 2, and a breathable waterproof film is arranged in the through holes. Through establishing barrel 2 in axis of rotation 4 and stirring vane 5 outsides, can keep apart the working solution that is located barrel 2 with outside heating element 6 on the one hand, the safety in utilization of device has been improved, on the other hand is at agitator motor 3, axis of rotation 4 and stirring vane 5 effect down, reach the effect of induced drafting, gas from top to bottom motion in hydrogenation reactor 1, the gas that is located hydrogenation reactor 1 lower part department is inside through the ventilative waterproof membrane suction of barrel 2 bottom department to barrel 2, hydrogen in the gas and the abundant contact of working solution mix and take place the reaction, make the gas circulation flow of hydrogenation reactor 1 inside, inside reaction gas temperature homogeneity has been guaranteed, the heat transfer efficiency among the reaction process has been improved.

Wherein, a plurality of heating elements 6 which are vertically arranged are uniformly distributed on the inner side wall of the hydrogenation reactor 1 along the circumference. Through setting up heating element 6, realized evenly fully heating hydrogenation reactor 1 inside gas and working solution.

Wherein the heating component 6 is a plate heater.

Wherein, the hydrogenation reactor 1 is provided with a working liquid inlet end 7 and a hydrogen inlet end 9, and the working liquid inlet end 7 is communicated with the inside of the cylinder 2 through a liquid inlet pipe 8. During operation, the working solution passes through feed liquor pipe 8 and imports to 2 insides of barrel, can keep apart working solution and outside heating element 6, has improved the safety in utilization of device.

Wherein, temperature sensors 10 are respectively arranged on the top in the hydrogenation reactor 1 and the inner side wall of the hydrogenation reactor 1. Can detect the inside each regional difference in temperature of hydrogenation reactor 1 in real time through temperature sensor 10, and feed back the testing result to the PLC controller, the rotational speed of agitator motor 3 is adjusted according to the difference in temperature data of feedback to the PLC controller, if each regional difference in temperature is great, then increase agitator motor 3's rotational speed, at this moment, stirring vane 5 induced drafts the effect and strengthens, the inside gas of hydrogenation reactor 1 can fast cycle flow get up, inside reaction gas temperature homogeneity has been guaranteed, the heat transfer efficiency among the reaction process has been improved, through the aforesaid adjustment, can control each regional gas difference in temperature of hydrogenation reactor 1 inside within 3 ℃.

Wherein, the upper part and the lower part of the inner side wall of the hydrogenation reactor 1 are respectively provided with a temperature sensor 10.

Wherein, the bottom of the hydrogenation reactor 1 is provided with a reaction liquid outlet 11, and the top of the hydrogenation reactor 1 is provided with a hydrogen outlet 12. After the working solution and the hydrogen are fully reacted, the hydrogen can be directly discharged from a hydrogen outlet end 12 at the top of the hydrogenation reactor 1, and the hydrogenated liquid obtained after the reaction is discharged from a reaction liquid outlet end 11 at the bottom of the hydrogenation reactor 1, so that gas-liquid separation is realized.

The working process is as follows:

firstly, introducing inert gas nitrogen into a hydrogenation reactor 1 to drive the gas, keeping the interior of the hydrogenation reactor 1 in a vacuum state, introducing hydrogen into the hydrogenation reactor 1 through a hydrogen inlet end 9, keeping the volume content of the hydrogen in the reactor above 72%, inputting quantitative working liquid into a cylinder 2 through a working liquid inlet end 7 and a liquid inlet pipe 8, starting a heating component 6 and a stirring motor 3, achieving the effect of air suction under the action of the stirring motor 3, a rotating shaft 4 and stirring blades 5, moving the gas in the hydrogenation reactor 1 from top to bottom, pumping the gas at the lower part in the hydrogenation reactor 1 into the cylinder 2 through a breathable waterproof film at the bottom of the cylinder 2, fully contacting and mixing the hydrogen in the gas and the working liquid and reacting to ensure that the gas in the hydrogenation reactor 1 circularly flows, and the temperature uniformity of the internal reaction gas is ensured, the heat transfer efficiency in the reaction process is improved, after the reaction is finished, gas is directly discharged from the hydrogen outlet end 12 at the top of the hydrogenation reactor 1, and the hydrogenated liquid obtained after the reaction is discharged from the reaction liquid outlet end 11 at the bottom of the hydrogenation reactor 1, so that gas-liquid separation is realized.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the utility model and are not intended to be limiting. For a person skilled in the art to which the utility model pertains, several simple deductions, modifications or substitutions may be made according to the idea of the utility model.

Claims

1. The utility model provides a hydrogen peroxide solution production hydrogenation is with gas temperature homogenization device for reaction, gas temperature homogenization device uses with hydrogenation ware cooperation, a serial communication port, gas temperature homogenization device includes barrel, agitator motor, axis of rotation and stirring vane, the axis of rotation is located hydrogenation reactor inside the central axis department, the axis of rotation lower extreme rotates and sets up bottom in the hydrogenation reactor, the axis of rotation upper end runs through hydrogenation reactor and with agitator motor is connected, the axis of rotation outside is equipped with multiunit stirring vane, the barrel cover is established the axis of rotation with the stirring vane outside, just the barrel outside is fixed through the connecting piece on the hydrogenation reactor inside wall, a plurality of through-holes have been seted up to the barrel bottom, be equipped with ventilative water proof membrane in the through-hole.

2. The gas temperature homogenizing device for the hydrogenation reaction in hydrogen peroxide production according to claim 1, wherein a plurality of vertically arranged heating assemblies are uniformly distributed on the inner side wall of the hydrogenation reactor along the circumference.

3. The gas temperature homogenizing device for hydrogen peroxide production hydrogenation reaction as claimed in claim 2, wherein the heating component is a plate heater.

4. The gas temperature homogenizing device for the hydrogenation reaction in hydrogen peroxide production according to claim 1, wherein a working liquid inlet end and a hydrogen inlet end are arranged on the hydrogenation reactor, and the working liquid inlet end is communicated with the inside of the cylinder through a liquid inlet pipe.

5. The gas temperature homogenizing device for hydrogenation reaction in hydrogen peroxide production according to claim 1, wherein temperature sensors are mounted on the top in the hydrogenation reactor and the inner side wall of the hydrogenation reactor.

6. The gas temperature uniformization device for hydrogen peroxide production hydrogenation reaction as claimed in claim 5, wherein the upper part and the lower part of the inner side wall of the hydrogenation reactor are respectively provided with a temperature sensor.

7. The gas temperature homogenizing device for hydrogenation reaction in hydrogen peroxide production according to claim 1, wherein a reaction liquid outlet end is arranged at the bottom of the hydrogenation reactor, and a hydrogen outlet end is arranged at the top of the hydrogenation reactor.