Cleaning mechanism of reaction kettle

Abstract

The utility model belongs to the technical field of chemical production, and particularly relates to a cleaning mechanism of a reaction kettle, which comprises the reaction kettle, a circulating pipeline, a circulating pump, a backflow pipeline and a secondary flow pipeline, the top of the reaction kettle is connected with an air inlet pipeline, a first feeding pipeline, a second feeding pipeline and an exhaust pipeline, and the bottom of the reaction kettle is connected with a discharging pipeline. The circulating pipeline comprises a first circulating pipeline and a second circulating pipeline, the first circulating pipeline is connected between the discharging pipeline and the circulating pump, the second circulating pipeline is connected between the circulating pump and the reaction kettle, one end of the backflow pipeline is connected with the second circulating pipeline, and the other end of the backflow pipeline extends into the bottom of the reaction kettle and is provided with a bent pipe assembly; one end of the secondary flow pipeline is connected with the top of the reaction kettle, and the other end is connected with the second circulating pipeline. According to the device, material scaling can be reduced, the frequency of manually cleaning the reaction kettle is reduced, and the working efficiency is improved; and the material reaction rate can be accelerated by utilizing gas circulation.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production, and in particular relates to a cleaning mechanism for a reaction kettle. Background Art

[0002] Polyferric sulfate is an inorganic polymer flocculant with superior performance. Its morphology is a light yellow amorphous powdery solid, which is very soluble in water. A 10% aqueous solution by mass is a reddish brown transparent solution. Compared with other flocculants, polyferric sulfate has the characteristics of low production cost, low dosage in the purification process, wide applicable pH range, less impurities, high COD removal rate, low residue concentration, large alum flocs and fast sedimentation rate, and good decolorization effect. Therefore, it has developed rapidly in recent years and is gradually replacing inorganic flocculants such as basic aluminum sulfate. It is widely used in water purification fields such as industrial wastewater, urban sewage, industrial water and domestic drinking water.

[0003] The process flow for preparing solid polyferric sulfate is as follows: artificial rutile mother liquor, concentrated sulfuric acid and ferrous sulfate heptahydrate are mixed to obtain ferrous sulfate solution, the ferrous sulfate solution is pumped into a reactor through a pump, and a low-concentration polyferric sulfate primary liquid is produced through oxidation, hydrolysis and polymerization reaction, the primary liquid is then concentrated by a multi-effect concentration system to produce qualified polyferric sulfate liquid, part of the polyferric sulfate liquid is directly sold out, and the rest is prepared into polyferric sulfate solid through atomization drying.

[0004] However, the existing reactor for producing polyferric sulfate has the following defects: 1) one of the raw materials for producing polyferric sulfate is solid ferrous sulfate, and the ferrous sulfate crystal particles are easy to adhere to the inner wall of the reactor and agglomerate during the feeding process; 2) due to the high production density and the limited circulation range of the circulation pump, the materials cannot be fully mixed, and the materials are easy to accumulate at the bottom of the reactor, resulting in insufficient reaction; 3) due to the poor high-temperature stability of polyferric sulfate, solids are easy to precipitate and adhere to the reactor body, requiring frequent manual cleaning of the reactor, which increases the labor intensity.

[0005] Therefore, a cleaning mechanism for a reactor is urgently needed to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned defects in the prior art, the utility model provides a cleaning mechanism for a reactor, comprising a reactor, a circulation pipeline, a circulation pump, a reflux pipeline and a secondary flow pipeline, the top of the reactor is connected with an air intake pipeline, a first feed pipeline, a second feed pipeline and an exhaust pipeline, the bottom of the reactor is connected with a discharge pipeline, the circulation pipeline comprises a first circulation pipeline and a second circulation pipeline, one end of the first circulation pipeline is connected to the discharge pipeline, the other end of the first circulation pipeline is connected to the inlet end of the circulation pump, one end of the second circulation pipeline is connected to the outlet end of the circulation pump, the other end of the second circulation pipeline is connected to the top of the reactor, and a jet mixer is also provided at the other end of the second circulation pipeline, one end of the reflux pipeline is connected to the second circulation pipeline, the other end of the reflux pipeline passes through the top wall of the reactor and extends to the bottom of the reactor, and a bent pipe assembly is provided at the other end of the reflux pipeline, one end of the secondary flow pipeline is connected to the top of the reactor, the other end of the secondary flow pipeline is connected to the second circulation pipeline, and flanges are installed at the connections between the reflux pipeline and the secondary flow pipeline and the second circulation pipeline.

[0007] Optionally, electric regulating valves are provided on the air intake pipe, the first feed pipe, the second feed pipe, the discharge pipe and the first circulation pipe.

[0008] Optionally, an exhaust valve is provided on the exhaust pipe.

[0009] Specifically, when the pressure exceeds the set upper limit during the production of polyferric sulfate, the exhaust valve automatically opens to exhaust gas to prevent the reactor from exploding due to excessive pressure.

[0010] Optionally, an air pump is provided on the secondary flow pipeline.

[0011] Optionally, the elbow assembly includes a first elbow, the top end of the first elbow is connected to the reflux pipe, and the bottom end of the first elbow faces the bottom of the reactor.

[0012] Optionally, the elbow assembly includes a second elbow and a first conical nozzle, the top end of the second elbow is connected to the reflux pipe, the bottom end of the second elbow is connected to one end of the first conical nozzle, the other end of the first conical nozzle is provided with a plurality of liquid outlet holes facing the bottom of the reactor, and the diameter of one end of the first conical nozzle is smaller than the diameter of the other end of the first conical nozzle.

[0013] Optionally, the elbow assembly includes a third elbow and a second conical nozzle, the top end of the third elbow is connected to the reflux pipe, the bottom end of the third elbow is connected to one end of the second conical nozzle, the other end of the second conical nozzle is connected to a plurality of liquid guide tubes and faces the bottom of the reactor, and the diameter of one end of the second conical nozzle is smaller than the diameter of the other end of the second conical nozzle.

[0014] The utility model also includes other components that enable a cleaning mechanism of a reactor to function normally, which are conventional technical means in the art. In addition, the devices or components not limited in the utility model all adopt conventional technical means in the art, such as electric regulating valves, exhaust valves, circulation pumps, air extraction pumps and jet mixers.

[0015] The working principle of the utility model is to add ferrous sulfate solution into a first feed pipe, and add catalyst sodium nitrite solution into a second feed pipe. After the reactants are added, oxygen is introduced into the air intake pipe to start the reaction in the reactor. During the reaction, the circulation pump is started to extract part of the reactants out of the reactor and flow them back into the reactor through the second circulation pipe and the reflux pipe. At the same time, the exhaust pump is started to extract the gas in the reactor and then enter the reactor together with the circulating reflux material to react. The gas can not only be recycled, but also the reaction rate can be increased. After sufficient reaction, the reaction product is discharged from the reactor through the discharge pipe.

[0016] The beneficial effects of the utility model are as follows: 1) a reflux pipeline is added, and a bend assembly is provided at the bottom of the reflux pipeline, so that the materials in the reactor form a vortex, preventing the materials from depositing and adhering to the inner wall of the reactor body, slowing down the scaling of the materials inside the reactor, greatly reducing the frequency of manual cleaning of the reactor, and improving work efficiency. 2) a secondary flow pipeline is added, and the gas in the reactor is extracted and then enters the reactor for reaction together with the circulating reflux materials. The gas can not only be recycled, but also the reaction rate can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This is a schematic structural diagram of a bent pipe assembly in a cleaning mechanism of a reactor provided in Example 1.

[0020] Figure 3 This is a schematic diagram of the structure of a bent pipe assembly in a cleaning mechanism of a reactor provided in Example 2.

[0021] Figure 4 This is a schematic structural diagram of a bent pipe assembly in a cleaning mechanism of a reactor provided in Example 3.

[0022] In the figure: 1. reactor, 2. circulation pump, 3. reflux pipe, 4. secondary flow pipe, 5. intake pipe, 6. first feed pipe, 7. second feed pipe, 8. exhaust pipe, 9. discharge pipe, 10. first circulation pipe, 11. second circulation pipe, 12. elbow assembly, 13. first elbow, 14. electric regulating valve, 15. exhaust valve, 16. vacuum pump, 17. second elbow, 18. first conical nozzle, 19. third elbow, 20. second conical nozzle, 21. liquid guide tube. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with the drawings and specific embodiments in the embodiments of the present invention. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the present invention.

[0024] Example 1

[0025] like Figure 1-2 As shown, the embodiment of the utility model provides a cleaning mechanism for a reactor, comprising a reactor 1, a circulation pipeline, a circulation pump 2, a reflux pipeline 3 and a secondary flow pipeline 4, the top of the reactor 1 is connected with an intake pipeline 5, a first feed pipeline 6, a second feed pipeline 7 and an exhaust pipeline 8, the bottom of the reactor 1 is connected with a discharge pipeline 9, the circulation pipeline comprises a first circulation pipeline 10 and a second circulation pipeline 11, one end of the first circulation pipeline 10 is connected to the discharge pipeline 9, the other end of the first circulation pipeline 10 is connected to the inlet end of the circulation pump 2, one end of the second circulation pipeline 11 is connected to the outlet end of the circulation pump 2, and the other end of the second circulation pipeline 11 is connected to the top of the reactor 1. The second circulation pipe 11 is connected to the reactor 1, and the other end of the second circulation pipe 11 is also provided with a jet mixer. One end of the reflux pipe 3 is connected to the second circulation pipe 11, and the other end of the reflux pipe 3 passes through the top wall of the reactor 1 and extends to the bottom of the reactor 1, and the other end of the reflux pipe 3 is provided with a bend assembly 12, and the bend assembly 12 includes a first bend 13, the top end of the first bend 13 is connected to the reflux pipe 3, and the bottom end of the first bend 13 faces the bottom of the reactor 1; one end of the secondary flow pipe 4 is connected to the top of the reactor 1, and the other end of the secondary flow pipe 4 is connected to the second circulation pipe 11, and flanges are installed at the connections between the reflux pipe 3 and the secondary flow pipe 4 and the second circulation pipe 11.

[0026] In addition, the air inlet pipe 5, the first feed pipe 6, the second feed pipe 7, the discharge pipe 9 and the first circulation pipe 10 are all provided with electric regulating valves 14. The exhaust pipe 8 is provided with an exhaust valve 15. When the pressure exceeds the set upper limit during the production of polyferric sulfate, the exhaust valve 15 automatically opens to exhaust gas to prevent the reactor 1 from exploding due to excessive pressure. The secondary flow pipe 4 is provided with an air pump 16.

[0027] The working principle of the utility model is to add ferrous sulfate solution into the first feed pipe 6, and add catalyst sodium nitrite solution into the second feed pipe 7. After the reactants are added, oxygen is introduced into the air intake pipe 5 to start the reaction in the reactor 1. During the reaction, the circulation pump 2 is started to extract part of the reactants from the reactor 1 and flow back to the reactor 1 through the second circulation pipe 11 and the reflux pipe 3. The bottom of the reflux pipe 3 is connected with a first elbow 13. The first elbow 13 has a certain angle with the horizontal plane, which can make the material in the reactor 1 form an eddy current, prevent the material from depositing, avoid the material from sticking to the inner wall of the reactor body, and slow down the scaling of the material inside the reactor 1; at the same time, the vacuum pump 16 is started to extract the gas in the reactor 1 and then enter the reactor 1 together with the circulating reflux material for reaction. The gas can not only be recycled, but also the reaction rate can be improved; after sufficient reaction, the reaction product is discharged from the reactor 1 through the discharge pipe 9.

[0028] Example 2

[0029] Combination Figure 3As shown, the embodiment of the utility model provides a cleaning mechanism for a reactor 1, comprising a reactor 1, a circulation pipeline, a circulation pump 2, a reflux pipeline 3 and a secondary flow pipeline 4, the top of the reactor 1 is connected with an intake pipeline 5, a first feed pipeline 6, a second feed pipeline 7 and an exhaust pipeline 8, the bottom of the reactor 1 is connected with a discharge pipeline 9, the circulation pipeline comprises a first circulation pipeline 10 and a second circulation pipeline 11, one end of the first circulation pipeline 10 is connected to the discharge pipeline 9, the other end of the first circulation pipeline 10 is connected to the inlet end of the circulation pump 2, one end of the second circulation pipeline 11 is connected to the outlet end of the circulation pump 2, the other end of the second circulation pipeline 11 is connected to the top of the reactor 1, and the other end of the second circulation pipeline 11 is also provided with a jet mixer, one end of the reflux pipeline 3 is connected to the second circulation pipeline 11, and the reflux pipeline 3 is connected to the second circulation pipeline 11. The other end of the flow pipe 3 passes through the top wall of the reactor 1 and extends to the bottom of the reactor 1, and the other end of the reflux pipe 3 is provided with a bend assembly 12, the bend assembly 12 includes a second bend 17 and a first conical nozzle 18, the top end of the second bend 17 is connected to the reflux pipe 3, the bottom end of the second bend 17 is connected to one end of the first conical nozzle 18, the other end of the first conical nozzle 18 is provided with a plurality of liquid outlets and faces the bottom of the reactor 1, and the diameter of one end of the first conical nozzle 18 is smaller than the diameter of the other end of the first conical nozzle 18; one end of the secondary flow pipe 4 is connected to the top of the reactor 1, and the other end of the secondary flow pipe 4 is connected to the second circulation pipe 11, and flanges are installed at the connection between the reflux pipe 3 and the secondary flow pipe 4 and the second circulation pipe 11; other structures and working principles are the same as those in Example 1.

[0030] Example 3

[0031] Combination Figure 4As shown, the embodiment of the utility model provides a cleaning mechanism for a reactor 1, comprising a reactor 1, a circulation pipeline, a circulation pump 2, a reflux pipeline 3 and a secondary flow pipeline 4, the top of the reactor 1 is connected with an intake pipeline 5, a first feed pipeline 6, a second feed pipeline 7 and an exhaust pipeline 8, the bottom of the reactor 1 is connected with a discharge pipeline 9, the circulation pipeline comprises a first circulation pipeline 10 and a second circulation pipeline 11, one end of the first circulation pipeline 10 is connected to the discharge pipeline 9, the other end of the first circulation pipeline 10 is connected to the inlet end of the circulation pump 2, one end of the second circulation pipeline 11 is connected to the outlet end of the circulation pump 2, the other end of the second circulation pipeline 11 is connected to the top of the reactor 1, and the other end of the second circulation pipeline 11 is also provided with a jet mixer, one end of the reflux pipeline 3 is connected to the second circulation pipeline 11, and the reflux pipeline 3 is connected to the second circulation pipeline 11. The other end of the pipe 3 passes through the top wall of the reactor 1 and extends to the bottom of the reactor 1, and the other end of the reflux pipe 3 is provided with a bend assembly 12, the bend assembly 12 includes a third bend 19 and a second conical nozzle 20, the top end of the third bend 19 is connected to the reflux pipe 3, the bottom end of the third bend 19 is connected to one end of the second conical nozzle 20, the other end of the second conical nozzle 20 is connected to a plurality of liquid guide tubes 21 and faces the bottom of the reactor 1, the diameter of one end of the second conical nozzle 20 is smaller than the diameter of the other end of the second conical nozzle 20; one end of the secondary flow pipe 4 is connected to the top of the reactor 1, the other end of the secondary flow pipe 4 is connected to the second circulation pipe 11, and flanges are installed at the connection between the reflux pipe 3 and the secondary flow pipe 4 and the second circulation pipe 11; other structures and working principles are the same as those in Example 1.

[0032] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A cleaning mechanism for a reactor, comprising a reactor, a circulation pipeline, a circulation pump, a reflux pipeline and a secondary flow pipeline, characterized in that: The top of the reactor is connected with an air intake pipe, a first feed pipe, a second feed pipe and an exhaust pipe, the bottom of the reactor is connected with a discharge pipe, the circulation pipe includes a first circulation pipe and a second circulation pipe, one end of the first circulation pipe is connected with the discharge pipe, the other end of the first circulation pipe is connected with the inlet end of the circulation pump, one end of the second circulation pipe is connected with the outlet end of the circulation pump, the other end of the second circulation pipe is connected with the top of the reactor, one end of the reflux pipe is connected with the second circulation pipe, the other end of the reflux pipe passes through the top wall of the reactor and extends to the bottom of the reactor, and the other end of the reflux pipe is provided with a bent pipe assembly, one end of the secondary flow pipe is connected with the top of the reactor, and the other end of the secondary flow pipe is connected with the second circulation pipe.

2. The cleaning mechanism of the reactor according to claim 1, characterized in that: Electric regulating valves are arranged on the air intake pipeline, the first feed pipeline, the second feed pipeline, the discharge pipeline and the first circulation pipeline.

3. The cleaning mechanism of the reactor according to claim 2, characterized in that: An exhaust valve is arranged on the exhaust pipe.

4. The cleaning mechanism of the reactor according to claim 3, characterized in that: An air pump is arranged on the secondary flow pipeline.

5. The cleaning mechanism of the reactor according to claim 4, characterized in that: The elbow assembly comprises a first elbow, the top end of which is connected to the reflux pipe, and the bottom end of which faces the bottom of the reactor.

6. The cleaning mechanism of the reactor according to claim 4, characterized in that: The elbow assembly includes a second elbow and a first conical nozzle. The top end of the second elbow is connected to the reflux pipe, the bottom end of the second elbow is connected to one end of the first conical nozzle, and the other end of the first conical nozzle is provided with a plurality of liquid outlets facing the bottom of the reactor.

7. The cleaning mechanism of the reactor according to claim 4, characterized in that: The elbow assembly includes a third elbow and a second conical nozzle. The top end of the third elbow is connected to the reflux pipe, the bottom end of the third elbow is connected to one end of the second conical nozzle, and the other end of the second conical nozzle is connected to a plurality of liquid guide tubes and faces the bottom of the reactor.

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