Device for accelerating catalytic oxidation reaction

Abstract

The utility model relates to the technical field of chemical reaction devices, in particular to a device for accelerating catalytic oxidation reaction, which comprises a barrel and a circulating system communicated with the barrel. The jet device is communicated with the circulating system, the jet device is positioned at the top of the barrel body, the bottom of the jet device is communicated with an acceleration reactor, the acceleration reactor comprises a straight pipe and a bent pipe which are integrally formed, an inverted conical pipe is fixed at the straight pipe part, and the opening part of the inverted conical pipe is in an inverted conical shape; the multiple bent pipes are evenly distributed on the periphery of the straight pipe in the circumferential direction with the straight pipe as the circle, and the opening portions of the bent pipes tilt upwards. According to the utility model, the contact area of materials and reaction gas can be increased, the material circulation is accelerated, the reaction efficiency is improved, and the production capacity is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical reaction devices, in particular to a device for accelerating catalytic oxidation reactions. Background Art

[0002] Reactor is a kind of reaction vessel widely used in the fields of petroleum, chemical industry, rubber, pesticide, dye, medicine and food. It is a pressure vessel used to complete the process of oxidation, sulfidation, nitration, hydrogenation, hydrocarbonization, polymerization, condensation, etc.

[0003] The reaction rate of the reactor is one of the factors for evaluating the performance of the reactor. Fast reaction efficiency means that the reaction time is shortened, the production cycle is shortened, the production task can be completed faster, the turnover rate of the production line can be improved, and the output can be increased at the same time. In the same period of time, more products can be produced, the company's production capacity can be improved, market demand can be met, and sales revenue can be increased. In addition, the shortened reaction time helps to reduce energy consumption and reduce energy costs. In order to improve the reaction efficiency of the reactor, the existing technology usually improves the ejector structure of the reactor, such as the existing technology "A kind of enamel reactor for producing ferric chloride" (publication number: CN217663352U), adding multiple liquid outlet heads under the ejector to spray the material into the inside of the reactor body to increase the contact area between the material and the reaction gas and improve the reaction effect. However, the existing technology still has the following technical problems:

[0004] The liquid discharge box in the prior art has a flat bottom structure, and the liquid discharge heads are distributed on the sides of the liquid discharge box, so that the material is sprayed out horizontally from the liquid discharge head and then falls downward into the reactor due to gravity, while the reaction gas is introduced into the reactor body from the air holes at the top. As a result, the material cannot be well contacted with the reaction gas after being sprayed out from the liquid discharge head, resulting in a poor reaction effect. Utility Model Content

[0005] The utility model provides a device for accelerating oxidation catalytic reaction, which can solve the problems of low reaction rate and poor reaction effect of the reaction device in the prior art.

[0006] The present application provides the following technical solution: a device for accelerating an oxidation catalytic reaction, comprising a cylinder and a circulation system connected to the cylinder;

[0007] It also includes an ejector connected to the circulation system, the ejector is located at the top of the cylinder, and the bottom of the ejector is connected to an acceleration reactor. The acceleration reactor includes an integrally formed straight pipe and a curved pipe. The straight pipe is fixed with an inverted cone pipe, and the mouth of the inverted cone pipe is in the shape of an inverted cone; there are multiple curved pipes, which are evenly distributed around the straight pipe in a circular direction, and the mouth of the curved pipe is upward.

[0008] Beneficial effects:

[0009] 1. Accelerate the flow rate of reaction gas and improve reaction efficiency. An inverted cone tube is set under the ejector so that the liquid material ejected from the ejector is sprayed onto the inner wall of the inverted cone tube. The shape of the inverted cone tube can once again play a role in gathering the liquid material, accelerating the liquid material to flow out of the ejector. In this way, the gas inside the ejector is quickly flushed out and becomes a negative pressure state. The reaction gas in the cylinder can be quickly sucked into the ejector to react with the liquid material, thereby accelerating the speed of the reaction gas entering the ejector and improving the reaction efficiency.

[0010] 2. Increase the contact area between the liquid material and the reaction gas and improve the reaction rate. By setting a bend under the straight pipe, the liquid material can flow along the arc inner wall of the bend to the pipe mouth after flowing into the straight pipe. Compared with the flat bottom of the liquid outlet box in the prior art, this structure can improve the smoothness of the liquid material flowing out of the bend, accelerate the flow rate of the liquid material, and improve efficiency. At the same time, the pipe mouth of the bend is tilted upward, so that the liquid material tends to be upward after being sprayed out, so that it can have a positive contact with the reaction gas introduced from the top of the cylinder, thereby increasing the contact area between the liquid material and the reaction gas and improving the reaction rate.

[0011] Furthermore, the circulation system includes a discharge pipe connected to the bottom of the cylinder, a circulation pump connected to the discharge pipe, a feed pipe connected between the circulation pump and the ejector, and an output pipe connected to the feed pipe.

[0012] Beneficial effect: The liquid material in the cylinder can be extracted by the circulation pump and sent into the ejector from the top of the cylinder. After accelerating the reaction with the reaction gas in the ejector, it returns to the cylinder to accelerate the circulation of the liquid material, thereby accelerating the reaction rate.

[0013] Furthermore, a liquid material feed port is provided on the top of the cylinder.

[0014] Beneficial effect: the liquid material feed port facilitates the delivery of liquid material into the cylinder.

[0015] Furthermore, an air suction hole is provided on the top of the cylinder, and the air suction hole is connected to the ejector.

[0016] Beneficial effect: The air suction hole facilitates the reaction gas in the cylinder to enter the ejector and react with the liquid material, thereby accelerating the reaction rate.

[0017] Furthermore, an oxygen inlet hole and a one-way air intake valve are also provided on the top of the cylinder.

[0018] Beneficial effects: The oxygen inlet hole is used to introduce reaction gas into the cylinder, and the one-way air intake valve is used to prevent negative pressure from being generated inside the cylinder during discharge, thereby avoiding the cracking of the fiberglass reinforced plastics in the cylinder.

[0019] Furthermore, an exhaust hole is provided on the top of the cylinder.

[0020] Beneficial effect: The tail gas hole is used to output the tail gas that meets the emission standards after the reaction is completed.

[0021] Furthermore, the circulation system also includes a graphite inlet arranged at the top of the cylinder, a graphite outlet arranged at the bottom of the cylinder, and a graphite heat exchanger connected between the graphite inlet and the graphite outlet.

[0022] Beneficial effects: The material can be cooled and cooled by the graphite heat exchanger. The graphite material has good thermal conductivity and heat transfer efficiency. At the same time, it has extremely high chemical stability in strong corrosive media such as acids and alkalis. It is not easy to damage, pollution-free and easy to maintain.

[0023] Furthermore, the top of the cylinder is provided with liquid alkali and tap water inlet holes.

[0024] Beneficial effects: The liquid alkali and tap water inlet holes can be easily pumped in from the outside of the cylinder. The liquid alkali is used to adjust the salinity, and the tap water is used to adjust the iron content according to customer needs, ensuring customer needs and increasing production flexibility.

[0025] Furthermore, an auxiliary material hole is provided on the top of the cylinder.

[0026] Beneficial effects: The auxiliary material holes facilitate the addition of auxiliary materials such as catalysts, which helps to improve reaction efficiency.

[0027] Furthermore, the cylinder is made of fiberglass.

[0028] Beneficial effects: FRP has good resistance to high temperature, acid and alkali, fluoride ions, etc. It is designed to withstand a pressure of 0.1Mpa, has excellent corrosion resistance, is compatible with waste hydrochloric acid from different manufacturers, and increases the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is the main structural diagram of the utility model.

[0030] Figure 2 It is a top view of the top of the cylinder of the present invention.

[0031] Figure 3 This is the main view of the internal structure of the ejector and reaction accelerator. DETAILED DESCRIPTION

[0032] The following is further described in detail through specific implementation methods:

[0033] The symbols in the drawings of the specification include: circulation pump 1, feed pipe 2, cylinder 3, discharge pipe 4, ejector 5, connecting pipe 6, manhole 7, oxygen inlet 8, auxiliary material hole 9, ejector installation port 10, liquid material feed port 11, suction hole 12, observation mirror 13, remote thermometer 14, solid material addition port 15, bursting disc 16, pressure relief valve 17, tail gas hole 18, liquid alkali and tap water inlet hole 19, remote pressure gauge 20, graphite inlet 21, graphite outlet 22, one-way suction valve 23.

[0034] Example 1

[0035] like Figures 1 to 3 As shown, a device for accelerating an oxidation catalytic reaction includes a cylinder 3, a circulation system connected to the cylinder 3, an ejector 5 connected between the cylinder 3 and the circulation system, and a reaction accelerator connected to the lower part of the ejector 5. The reaction accelerator is located inside the cylinder 3. The material of this device is preferably glass fiber reinforced plastic, which is resistant to high temperatures, acids and alkalis, has strong pressure bearing capacity, and is also resistant to fluoride ions in the raw material waste hydrochloric acid, preventing internal corrosion of the device.

[0036] like Figure 1 As shown, the circulation system includes a discharge pipe 4 connected to the bottom of the cylinder 3, a circulation pump 1 connected to the discharge pipe 4, a feed pipe 2 connected between the circulation pump 1 and the ejector 5, and an output pipe connected to the feed pipe 2. Multiple circulation pumps 1 can be provided. This embodiment uses two as an example, symmetrically arranged on either side of the cylinder 3. Valves (omitted in the figure) are provided on the feed pipe 2 and the output pipe. The circulation pump 1 can extract the liquid material from the cylinder 3 and then feed it into the ejector 5 from the top of the cylinder 3. After accelerating the reaction with the reaction gas in the ejector 5, the liquid material returns to the cylinder 3, accelerating the circulation of the liquid material and thus the reaction rate.

[0037] The circulation system also includes graphite heat exchangers, such as Figure 2 As shown, a graphite inlet 21 is provided at the top of the cylinder 3. Figure 1 As shown, a graphite outlet 22 is provided at the bottom of the cylinder 3, and the graphite heat exchanger is connected between the graphite inlet 21 and the graphite outlet 22. The material enters the graphite heat exchanger pump from the graphite outlet 22, is pumped into the graphite heat exchanger, and then re-enters the cylinder 3 through the graphite inlet 21, thereby cooling the material by heat exchange and temperature reduction.

[0038] like Figure 3As shown, the ejector 5 is located at the top of the cylinder 3. The top of the cylinder 3 is provided with an ejector mounting port 10 connected to the inside of the cylinder 3. The ejector mounting port 10 is used to fix the ejector 5. The feed pipe 2 is connected to the ejector 5 from the top, and the mouth of the feed pipe 2 extends into the ejector 5. The bottom of the ejector 5 is connected with an acceleration reactor. The acceleration reactor includes an integrally formed straight pipe and a curved pipe. The straight pipe is fixed with an inverted cone pipe, and the mouth of the inverted cone pipe is in the shape of an inverted cone; there are multiple curved pipes, which are evenly distributed around the straight pipe in a circular direction with the straight pipe as the center, and the mouth of the curved pipe is upwardly tilted. The liquid material ejected from the ejector 5 is sprayed onto the inner wall of the inverted cone tube, and the shape of the inverted cone tube can once again play a role in gathering the liquid material, so that the liquid material is accelerated to flow out of the ejector 5. In this way, the gas inside the ejector 5 is quickly rushed out and becomes a negative pressure state. The reaction gas in the cylinder 3 can be quickly sucked into the ejector 5 to react with the liquid material, thereby accelerating the speed at which the reaction gas enters the ejector 5 and improving the reaction efficiency. A bend is set under the straight pipe so that after the liquid material flows into the straight pipe, it can flow along the arc inner wall of the bend to the pipe mouth, which can improve the smoothness of the liquid material flowing out of the bend, accelerate the flow rate of the liquid material, and improve the efficiency. At the same time, the pipe mouth of the bend is tilted upward, so that the liquid material tends to be upward after being ejected, so that it can have a positive contact with the reaction gas introduced from the top of the cylinder 3, thereby increasing the contact area between the liquid material and the reaction gas, and further improving the reaction rate.

[0039] like Figure 2 As shown, the top of the cylinder 3 is also provided with an auxiliary material hole 9, a liquid alkali and tap water inlet hole 19, an oxygen inlet hole 8, an air intake hole 12, a manhole 7, an observation mirror 13 arranged on the manhole 7, a one-way air intake valve 23, a remote pressure gauge 20, a bursting disc 16, a remote thermometer 14, a pressure relief valve 17, a solid material addition port 15, a liquid material feed port 11 and an exhaust hole 18 located in the middle of the top of the cylinder 3.

[0040] The oxygen inlet hole 8 is used for introducing reaction gas into the cylinder body 3; the liquid alkali and tap water inlet hole 19 is convenient for pumping liquid alkali and tap water from the outside, the liquid alkali is used for adjusting the salt base, and the tap water is used for adjusting the iron content according to the demand; the one-way air suction valve 23 is used for preventing the negative pressure in the cylinder body 3 from causing the glass bottle to break during discharging; the auxiliary material hole 9 is convenient for adding catalyst and other auxiliary materials to increase the reaction plastic; the liquid material inlet hole 11 is convenient for sending liquid material into the cylinder body 3; the air suction hole 12 is convenient for the reaction gas in the cylinder body 3 to enter the liquid material in the liquid material inlet hole 11 and react with the liquid material, thereby accelerating the reaction rate; the observation mirror 13 is used for the operator to observe the change of the material in the reaction kettle, thereby facilitating the adjustment of the working condition according to the change to improve the reaction effect; the remote thermometer 14 is used for monitoring the temperature change in the cylinder body 3; the remote pressure gauge 20 is used for monitoring the pressure in the cylinder body 3; the bursting disc 16 can prevent the pressure in the cylinder body 3 from being out of control, and can form a through hole by explosion to forcibly release the pressure; the pressure relief valve 17 is used for adjusting the pressure in the cylinder body 3 when needed; the tail gas hole 18 is connected to the tail gas treatment device, and is used for outputting the tail gas obtained after the reaction in the cylinder body 3, preventing the accumulation of tail gas in the cylinder body 3, and affecting the reaction rate; the manhole 7 is provided, so that when the cylinder body 3 needs to be maintained, the worker can enter and exit conveniently.

[0041] The use method of the device is as follows:

[0042] Taking the preparation of polyferric chloride as an example:

[0043] Raw material: waste hydrochloric acid generated in an iron washing plant (mainly containing waste hydrochloric acid containing ferrous chloride).

[0044] Catalyst: sodium nitrite.

[0045] Reaction gas: oxygen.

[0046] The working process is as follows:

[0047] ①The waste hydrochloric acid raw material is injected into the cylinder body 3 through the liquid material inlet hole 11, and the reaction gas is introduced from the oxygen inlet hole 8.

[0048] ②Start the circulating pump 1. The liquid material is pumped into the liquid material inlet hole 11 by the circulating pump, and is sprayed into the cylinder body 3 by the liquid material inlet hole 11. A vacuum is formed in the liquid material inlet hole 11, so that the reaction gas in the cylinder body 3 is sucked into the liquid material inlet hole 11 through the communication pipe 6 and reacts with the divalent iron in the waste hydrochloric acid to be oxidized to trivalent iron.

[0049] ③The sodium nitrite solution is injected into the cylinder body 3 through the auxiliary material hole 9.

[0050] ④Open the oxygen valve, and oxygen is introduced into the cylinder body 3 from the oxygen inlet hole 8.

[0051] ⑤Adjust the pressure in the cylinder body 3, and the pressure is controlled at 0.02 Mpa.

[0052] ⑥ When the temperature inside the cylinder 3 reaches 70℃, start the circulating cooling water system to keep the temperature inside the cylinder 3 not exceeding 75℃.

[0053] ⑦React for 3 hours to completely oxidize the divalent iron in the waste hydrochloric acid into trivalent iron.

[0054] ⑧ Open the valve on the output pipe and the valve on the tail gas port 18, and close the valve on the feed pipe 2. This allows the fully oxidized material to be transferred to the product temporary storage tank via the circulation pump 1 for 24 hours of aging. The tail gas enters the tail gas system through the tail gas port 18 for treatment and discharge after meeting the standards. After aging is completed, the generated polyferric chloride is transferred to the product tank for storage.

[0055] The above is only an embodiment of the present invention. The present invention is not limited to the field involved in this implementation case. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A device for accelerating a catalytic oxidation reaction, comprising a cylinder and a circulation system connected to the cylinder, characterized in that: It also includes an ejector connected to the circulation system, the ejector is located at the top of the cylinder, and the bottom of the ejector is connected to an acceleration reactor. The acceleration reactor includes an integrally formed straight pipe and a curved pipe. An inverted cone pipe is fixed on the straight pipe, and the mouth of the inverted cone pipe is in the shape of an inverted cone; there are multiple curved pipes, which are evenly distributed around the straight pipe in a circular direction with the straight pipe as the center, and the mouth of the curved pipe is upwardly tilted.

2. The device for accelerating catalytic oxidation reaction according to claim 1, characterized in that: The circulation system includes a discharge pipe connected to the bottom of the cylinder, a circulation pump connected to the discharge pipe, a feed pipe connected between the circulation pump and the ejector, and an output pipe connected to the feed pipe.

3. The device for accelerating catalytic oxidation reaction according to claim 2, characterized in that: A liquid material feed port is also provided on the top of the cylinder.

4. The device for accelerating catalytic oxidation reaction according to claim 3, characterized in that: An air suction hole is also provided on the top of the cylinder, and the air suction hole is communicated with the ejector.

5. The device for accelerating catalytic oxidation reaction according to claim 4, characterized in that: The top of the cylinder is also provided with an oxygen inlet hole and a one-way air intake valve.

6. The device for accelerating catalytic oxidation reaction according to claim 5, characterized in that: The top of the cylinder is also provided with an exhaust hole.

7. The device for accelerating catalytic oxidation reaction according to claim 2, characterized in that: The circulation system further comprises a graphite inlet arranged at the top of the cylinder, a graphite outlet arranged at the bottom of the cylinder, and a graphite heat exchanger connected between the graphite inlet and the graphite outlet.

8. The device for accelerating catalytic oxidation reaction according to claim 7, characterized in that: The top of the cylinder is also provided with liquid alkali and tap water inlet holes.

9. The device for accelerating catalytic oxidation reaction according to claim 8, characterized in that: The top of the cylinder is also provided with an auxiliary material hole.

10. The device for accelerating catalytic oxidation reaction according to claim 9, characterized in that: The material of the cylinder is glass fiber reinforced plastic.

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