Built-in filter screen of tubular reactor

Abstract

The utility model discloses a built-in filter screen of a tubular reactor, which comprises a filter screen, an auxiliary fixing frame is fixedly mounted on the filter screen, two connecting rods are fixedly connected onto the auxiliary fixing frame, two mounting frames are fixedly mounted on the filter screen, a fixed cylinder is fixedly mounted between the two mounting frames in a penetrating manner, and the two connecting rods are fixedly connected with the fixed cylinder respectively. The arc-shaped clamping blocks can be simply limited with the edge of the reactor, the occurrence probability of safety accidents is greatly reduced, the stability of the filter screen is ensured through the auxiliary fixing frames, deformation of the filter screen is avoided, after preliminary welding is completed, the auxiliary welding plates are inserted into the corresponding inserting grooves, the auxiliary welding plates and the inner wall of the reactor are further welded, and the welding efficiency is improved. Therefore, the welding area is increased, and the overall stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to BDO production field, concretely relates to a filter screen built -in in column pipe type reactor. BACKGROUND

[0002] The preparation process of 1,4 butanediol is called BDO, and the column pipe type reactor is used in the BDO cyclization reactor, the reactor pipe design has 1150 column pipes, each column pipe is equipped with 520g ion exchange resin, and the ion exchange resin is used as the catalyst of the BDO cyclization reaction; the reactor shell design has low-pressure steam, which provides heat for the reaction, the liquid level above the reactor upper tube plate is controlled to be 300-500mm to prevent the reactor from dry burning; during normal production, BDO enters the pipe and contacts the catalyst from the bottom of the reactor, and at the same time, under the reaction temperature of 110-130 DEG C, the BDO cyclization reaction is generated to generate tetrahydrofuran, which provides raw materials for the production of PTMEG; in order to prevent the accumulation of tar in the reactor, the reactor upper tube plate is always kept at 0.15 times of the liquid phase production of the feed amount, and the generated tar in the reactor is discharged.

[0003] The ion exchange resin is used as the cyclization reaction catalyst, which determines the BDO reaction rate and the quality of the product tetrahydrofuran, in order to make the catalyst fully contact with BDO and achieve the best reaction state, the catalyst needs to be in a fluidized state during the reaction, and at the same time, in order to prevent the catalyst from escaping and stringing pipe under the fluidized state, leading to the decrease of BDO reaction rate and the increase of by-products, the reactor tube plate is provided with a 0.2mm wedge wire mesh, which well blocks the catalyst from escaping.

[0004] However, there are some problems, first, the catalyst life is reduced: the resistance of the generated tetrahydrofuran gas phase through the upper grid wedge wire mesh is increased, the reactor pressure difference is increased, the catalyst breakage rate is increased, the catalyst life is reduced, and the reactor operation cycle is shortened, second, the reaction by-product tar cannot be taken out in time, leading to the decrease of catalyst activity: the generated tetrahydrofuran is rapidly vaporized to bring the resin in the column pipe into the gas phase space at the top of the column pipe, the generated tar cannot be dissolved into BDO and taken out of the reactor in time, so that the resin is condensed at the top of the column pipe due to the tar, the activity is reduced, and the reaction rate is reduced, then the column pipe cleaning difficulty is increased: the tar accumulates, the reaction conditions change, the tar blocks the column pipe, and the column pipe cleaning difficulty is increased.

[0005] In order to solve the above problems, the upper tube plate wedge wire mesh and the grid are cancelled, and the built-in filter screen is used to replace, although the above problems are well solved, but in the actual installation and production maintenance process, it is found that the operation work is inconvenient when installing and replacing the built-in filter screen, there is a safety hazard, in addition, the built-in filter screen lacks auxiliary supporting structure, and there are problems of easy deformation and unstable installation.

[0006] Therefore, there is a need for an inner filter screen which can be easily installed and fixed firmly without deformation. Utility model content:

[0007] The utility model discloses a tube reactor built-in filter screen.

[0008] The utility model discloses by following technical schemes implementation:

[0009] A tube reactor built-in filter screen, including filter screen, the filter screen is fixedly installed with the auxiliary fixing frame, two connecting rods are fixedly connected on the auxiliary fixing frame, two installation frames are fixedly installed on the filter screen, and the fixed cylinder is fixedly penetrated and installed between two installation frames, two connecting rods are fixedly connected with the fixed cylinder respectively, and the both ends of the fixed cylinder are inserted with the telescopic rod of sliding connection.

[0010] Preferably, the auxiliary fixing frame is composed of two fixed rings and multiple stable rods, the diameters of the two fixed rings are sequentially reduced, and the multiple stable rods are fixedly connected with the outer wall of the small-diameter fixed ring and the inner wall of the large-diameter fixed ring respectively.

[0011] Preferably, multiple insertion slots are uniformly arranged at the edge of the filter screen in a ring shape, and the auxiliary welding plate of sliding connection is inserted into each insertion slot.

[0012] The utility model discloses the advantages are as follows: the arc-shaped clamping block can be simply limited with the edge of the reactor, greatly reduces the probability of the occurrence of safety accidents, the auxiliary fixing frame ensures the stability of the filter screen, avoids the deformation of the filter screen, after the preliminary welding is completed, the auxiliary welding plate is inserted into the corresponding insertion slot, the auxiliary welding plate is further welded with the inner wall of the reactor, welding area is increased, and therefore the overall stability is improved. DRAWINGS:

[0013] Figure 1 It is the schematic diagram of the structure of the utility model.

[0014] In the drawing: filter screen 1, auxiliary fixing frame 2, connecting rod 3, installation frame 4, fixed cylinder 5, telescopic rod 6, arc-shaped clamping block 7, insertion slot 8, auxiliary welding plate 9. CONCRETE IMPLEMENTATION:

[0015] As Figure 1As shown, a kind of filter screen in shell-and-tube reactor, including filter screen 1, auxiliary fixing frame 2 is fixedly installed on filter screen 1, two connecting rods 3 are fixedly connected on auxiliary fixing frame 2, two installation frames 4 are fixedly installed on filter screen 1, fixed cylinder 5 is fixedly installed between two installation frames 4, two connecting rods 3 are fixedly connected with fixed cylinder 5 respectively, telescopic rod 6 of sliding connection is inserted into both ends of fixed cylinder 5, arc-shaped clamping block 7 is fixedly connected to one end of each telescopic rod 6, two locking pins are screwed on fixed cylinder 5, when installing, first filter screen 1 is hoisted to reactor, then operator also carries out high-altitude operation, located above filter screen 1, prepares to carry out welding operation to filter screen 1, installation frame 4 and fixed cylinder 5 are set, so that the hoisting work of entire filter screen 1 is facilitated, and after hoisting to appropriate position, telescopic rod 6 is pulled out, so that arc-shaped clamping block 7 can be simply limited with the edge of reactor, after electric welding is carried out by operator, immediately tighten bolt, so as to keep stable fixation, so that operator can work on filter screen 1, with a simple guarantee, the probability of safety accident is greatly reduced, after the edge of filter screen 1 is welded, the normal use of filter screen 1 can be ensured.

[0016] Auxiliary fixing frame 2 is composed of two fixed rings and multiple stable rods, the diameters of the two fixed rings are sequentially reduced, and the multiple stable rods are fixedly connected with the outer wall of the small-diameter fixed ring and the inner wall of the large-diameter fixed ring, thereby ensuring the stability of the filter screen 1 and avoiding deformation thereof.

[0017] Multiple insertion slots 8 are uniformly arranged at the edge of the filter screen 1, and an auxiliary welding plate 9 of sliding connection is inserted into each insertion slot 8. After preliminary welding, in order to further improve stability and reduce the problem of insufficient welding area at the annular edge of the filter screen 1, the auxiliary welding plate 9 is inserted into the corresponding insertion slot 8, and the auxiliary welding plate 9 is further welded with the inner wall of the reactor, thereby increasing the welding area and improving overall stability.

[0018] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A tubular reactor with an internal filter screen, characterized in that: Including filter screen, the filter screen is fixedly installed with auxiliary fixing frame, the auxiliary fixing frame is fixedly connected with two connecting rods, the filter screen is fixedly installed with two mounting frames, two mounting frames are fixedly penetrated with fixed cylinder, two connecting rods are fixedly connected with fixed cylinder respectively, both ends of the fixed cylinder are inserted with sliding connection telescopic rods, one end of each telescopic rod is fixedly connected with arc-shaped clamping block, the fixed cylinder is screwed with two locking pins.

2. The in-line filter according to claim 1, wherein: The auxiliary fixing frame is composed of two fixed rings and multiple stable rods, the diameters of the two fixed rings are sequentially reduced, and the multiple stable rods are fixedly connected with the outer wall of the small-diameter fixed ring and the inner wall of the large-diameter fixed ring respectively.

3. The in-line filter according to claim 1, wherein: Multiple insertion slots are uniformly arranged at the edge of the filter screen in a ring shape, and an auxiliary welding plate is inserted in each insertion slot in a sliding connection mode.

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