Suction filtration device for pyrazole compound

Abstract

The utility model belongs to the technical field of 5-hydroxy-1-methyl-3-trifluoromethyl-1H-pyrazole preparation, and particularly relates to a pyrazole compound suction filtration device which comprises a Buchner funnel, a suction filtration box, a liquid collection box and a vacuum assembly, the Buchner funnel is connected to the suction filtration box, the vacuum assembly comprises a first guide pipe and a second guide pipe, and the first guide pipe is connected with the liquid collection box. One end of the first guide pipe is connected with the top of the suction filtration box, and the other end of the first guide pipe is connected with the top of the liquid collection box; a third guide pipe is further arranged at the position, close to the top, of the liquid collecting box and connected with a power device. Compared with the prior art, the device disclosed by the utility model can be used for amplifying production and realizing continuous suction filtration, and meanwhile, the stability of the device in an operation process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to 5 - hydroxyl - 1 - methyl - 3 - trifluoromethyl - 1H - pyrazole preparation technical field, especially the pyrazole compound's suction filtration device of a kind of. BACKGROUND

[0002] In fine chemical industry, 5-hydroxy-1-methyl-3-trifluoromethyl-1H-pyrazole is widely used in medicine, pesticide, material science and many other high-end industries as an important organic synthesis intermediate. With the rapid development of these downstream industries, the demand for 5-hydroxy-1-methyl-3-trifluoromethyl-1H-pyrazole continues to rise, and the requirements for its product purity and quality are increasingly stringent. In the production process of 5-hydroxy-1-methyl-3-trifluoromethyl-1H-pyrazole, suction filtration is a very critical process. The quality of suction filtration directly affects the final purity, yield and production efficiency of the product.

[0003] The traditional suction filtration device used for the preparation of this substance has a relatively simple structure design and is usually composed of a basic Buchner funnel and a suction filtration bottle. However, this conventional device has a slow vacuum establishment in the early stage of suction filtration, resulting in a low filtration speed and a significant extension of the production cycle. Moreover, during the filtration process, as the filter cake gradually thickens, the filtration resistance increases dramatically, and if the pressure in the device cannot be adjusted in time and effectively, the vacuum pump may be damaged due to gas retention, seriously affecting the continuity of production.

[0004] Therefore, there is a need to develop a high-efficiency suction filtration device that can solve the above problems to improve product quality, optimize production process, reduce production cost and enhance the stability and safety of the production process. INVENTION CONTENTS

[0005] The utility model aims at the deficiency of prior art, develops a pyrazole compound's suction filtration device, can carry out amplification production, realizes continuous suction filtration, and improves the stability of device.

[0006] The technical scheme for solving the technical problem of the utility model is a pyrazole compound's suction filtration device, which includes a Buchner funnel and a suction filtration box. The Buchner funnel is connected to the suction filtration box. The device further includes a liquid collection tank and a vacuum assembly. The vacuum assembly includes a first conduit and a second conduit. One end of the first conduit is connected to the top of the suction filtration box, and the other end is connected to the top of the liquid collection tank. One end of the second conduit is connected to the bottom of the suction filtration box, and the other end is connected to the top of the liquid collection tank. A third conduit is arranged on the liquid collection tank near the top. The third conduit is connected to a power device.

[0007] As a preferred embodiment, a first electromagnetic valve and a second electromagnetic valve are arranged on the first conduit and the second conduit, respectively.

[0008] Preferably, the filter box is provided with a liquid level sensor.

[0009] Preferably, the B?hse funnel is provided with a rubber plug, which is an inverted trapezoid in vertical projection.

[0010] Preferably, the liquid collecting tank is provided with a vacuum safety valve.

[0011] Preferably, the liquid collecting tank is provided with an electromagnetic pressure relief valve.

[0012] Preferably, the liquid collecting tank is provided with a liquid outlet pipe near the bottom, and the liquid outlet pipe is provided with a third electromagnetic valve.

[0013] Preferably, the power device is a vacuum pump.

[0014] The effects provided in the content of the utility model are only the effects of the embodiments, and are not all the effects of the utility model. The above technical solutions have the following advantages or beneficial effects:

[0015] 1. By providing the first conduit and the second conduit, the liquid level sensor can be matched to work. When the internal liquid level is below a predetermined value, the first conduit works to achieve a vacuum effect. When the liquid level reaches a certain height, the second conduit works to achieve a vacuum effect. Through this matching mode, the continuous work of the filter box can be realized, and the production efficiency is improved.

[0016] 2. The vacuum safety valve is arranged on the liquid collecting tank. In the late filtration, the filter cake is too thick, the air intake is small, and the vacuum pump is prone to gas choking and vibration. By arranging the vacuum safety valve, a predetermined pressure is set. When the internal and external pressure difference is greater than the set pressure, a small amount of air is automatically supplemented into the filter box, and the vacuum pump is better protected.

[0017] 3. By arranging the electromagnetic pressure relief valve, when the liquid needs to be discharged after a filtration operation, the controller controls the electromagnetic pressure relief valve to open, and the liquid collecting tank restores to normal pressure. At this time, the controller controls the third electromagnetic valve to open, so that the liquid in the liquid collecting tank can be conveniently discharged. Before the electromagnetic pressure relief valve is opened, the first electromagnetic valve and the second electromagnetic valve need to be closed.

[0018] 4. By arranging the inverted trapezoidal rubber plug on the B?hse funnel, the sealing property between the B?hse funnel and the filter box can be improved, and the filtration efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the utility model;

[0020] Figure 2 It is a sectional view in the direction of A-A in the figure;

[0021] Figure 3 It is a right view of the utility model;

[0022] Figure 4 is Figure 3 the sectional view in A-A direction;

[0023] Figure 5 is the top view of the present application;

[0024] Figure 6 is the overall structure diagram of the present application.

[0025] Wherein: 1, burrel funnel;101, rubber plug;2, suction filter box;21, liquid level sensor;22, first conduit;221, first solenoid valve;23, second conduit;231, second solenoid valve;3, liquid collecting tank;31, vacuum safety valve;32, electromagnetic pressure relief valve;33, liquid outlet pipe;331, third solenoid valve;4, third conduit;5, vacuum pump. DETAILED DESCRIPTION

[0026] In order to clearly illustrate the technical features of the present application, the present application will be described in detail below, combined with the drawings of the embodiments.

[0027] Embodiment 1

[0028] Referring to Figures 1 to 6 , a suction filter device for pyrazole compound includes a burrel funnel 1 and a suction filter box 2, the burrel funnel 1 is connected to the suction filter box 2, further includes a liquid collecting tank 3 and a vacuum assembly, the vacuum assembly includes a first conduit 22 and a second conduit 23, one end of the first conduit 22 is connected to the top of the suction filter box 2, and the other end is connected to the top of the liquid collecting tank 3, one end of the second conduit 23 is connected to the bottom of the suction filter box 2, and the other end is connected to the top of the liquid collecting tank 3;The third conduit 4 is further arranged on the liquid collecting tank 3 close to the top, and the third conduit 4 is connected with a power device.

[0029] As shown in Figure 1 and Figure 4 , the first conduit 22 and the second conduit 23 are respectively provided with a first solenoid valve 221 and a second solenoid valve 231.

[0030] As shown in Figure 2 , the suction filter box 2 is provided with a liquid level sensor 21.

[0031] As shown in Figure 1 and Figure 4 , the burrel funnel 1 is provided with a rubber plug 101, and the vertical projection of the rubber plug 101 is an inverted trapezoid.

[0032] As shown in Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the header tank 3 is provided with a vacuum safety valve 31.

[0033] As shown in Figure 1 , Figure 4 , Figure 5 and Figure 6 , the header tank 3 is provided with an electromagnetic relief valve 32.

[0034] As shown in Figure 3 and Figure 6 , the header tank 3 is provided with a liquid outlet pipe 33 near the bottom, and the liquid outlet pipe 33 is provided with a third electromagnetic valve 331.

[0035] As a preferred, the power device is a vacuum pump 5.

[0036] Principle and operation process

[0037] The utility model adopts the existing controller to accept sensor signal and control each part, and liquid level sensor 21 monitors the filtrate liquid level dynamic, in the filtration starting stage, liquid level is in the preset low value range, at this moment, the controller controls the opening first electromagnetic valve 221 on first guide pipe 22 according to liquid level sensor 21 feedback signal, and ensures second electromagnetic valve 231 to be in the closed state simultaneously. Vacuum pump 5 immediately sucks the air in the space at the top of filtration tank 2 through first guide pipe 22, and the gas pressure in the tank decreases sharply, and a vacuum environment is constructed;With the filtration process advancing, the filtrate continues to accumulate, and the liquid level gradually becomes high, when the liquid level reaches the pre-set liquid level threshold, the controller controls the closing first electromagnetic valve 221, and the opening second electromagnetic valve 231. At this moment, the working path of vacuum pump 5 is switched to second guide pipe 23, and the mixture of filtrate and a small amount of residual air is extracted from the bottom of filtration tank 2, to ensure that the vacuum degree in the tank is continuously stable, and the filtrate continuously flows to header tank 3, to realize the continuous and efficient operation of filtration tank 2.

[0038] The vacuum safety valve 31 provided on the header tank 3 sets a predetermined pressure value, in the filtration later period, with the continuous increase of filter cake thickness, the air inlet channel becomes increasingly narrow, the air intake amount sharply decreases, the internal gas pressure distribution of vacuum pump 5 is unbalanced, and the air suction becomes more difficult, and it is easy to be trapped in the working condition of gasping and wheezing. At this time, the internal and external pressure intensities formed by the gas pressure in filtration tank 2 and the connected pipeline and the external environment increase, when the pressure exceeds the pre-set safety pressure threshold, the vacuum safety valve 31 automatically opens to supplement a small amount of air to the inside of header tank 3, so that the air inlet pressure of vacuum pump 5 is maintained in a reasonable range.

[0039] When the filtration operation is completed, the controller sends clear closing instructions to the first electromagnetic valve 221 and the second electromagnetic valve 231. Then the controller controls the electromagnetic pressure relief valve 32 to open, and the outside air rushes into the liquid collecting tank 3, and the air pressure in the liquid collecting tank 3 recovers to the normal atmospheric pressure level consistent with the outside; after the pressure in the liquid collecting tank 3 is stably recovered to normal, the controller controls the third electromagnetic valve 331 to open; at this time, the filtrate in the liquid collecting tank 3 is discharged along the liquid outlet pipe 33.

[0040] The specific embodiments of the utility model are described above in combination with the drawings, but are not a limitation on the protection scope of the utility model. Various modifications or changes made by those skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A filtration apparatus for pyrazole compounds, comprising a Buchner funnel (1) and a filtration box (2), said Buchner funnel (1) being connected to the filtration box (2), characterized in that: Also include a liquid collecting tank (3) and a vacuum assembly, the vacuum assembly includes a first conduit (22) and a second conduit (23), one end of the first conduit (22) is connected with the top of the suction filter tank (2), one end is connected with the top of the liquid collecting tank (3), one end of the second conduit (23) is connected with the bottom of the suction filter tank (2), one end is connected with the top of the liquid collecting tank (3); The third conduit (4) is also arranged on the liquid collecting tank (3) near the top, the third conduit (4) is connected with the power device.

2. A device for filtering pyrazole compounds according to claim 1, characterized in that, The first conduit (22) and the second conduit (23) are respectively provided with a first electromagnetic valve (221) and a second electromagnetic valve (231).

3. The filtration apparatus for a pyrazole compound according to claim 1, characterized in that, The suction filter tank (2) is provided with a liquid level sensor (21).

4. The filtration apparatus for a pyrazole compound according to claim 1, characterized in that, The Bristle funnel (1) is provided with a rubber plug (101), and the vertical projection of the rubber plug (101) is an inverted trapezoid.

5. The filtration apparatus for a pyrazole compound according to claim 1, characterized in that, The liquid collecting tank (3) is provided with a vacuum safety valve (31).

6. The filtration apparatus for a pyrazole compound according to claim 1, characterized in that, The liquid collecting tank (3) is provided with an electromagnetic pressure relief valve (32).

7. The filtration apparatus for a pyrazole compound according to claim 1, characterized in that, The liquid collecting tank (3) is provided with a liquid outlet pipe (33) near the bottom, and the third electromagnetic valve (331) is arranged on the liquid outlet pipe (33).

8. The filtration apparatus for a pyrazole compound according to claim 1, characterized in that, The power device is a vacuum pump (5).

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