Formic acid hydrolysis reactor

Abstract

The utility model relates to a formic acid hydrolysis reactor which comprises a tower body, a delivery pump, a liquid pipeline, a liquid inlet, a liquid outlet and an inlet distributor, and further comprises a steam delivery pipeline, a steam recovery pipeline, an inlet pipe, a front pipe box, heat exchange coil pipes, a rear pipe box and an outlet pipe, the heat exchange coil pipe is divided into a front heat exchange area and a rear heat exchange area, the heat exchange coil pipes of the two heat exchange areas are respectively composed of a plurality of coiled pipes which are respectively arranged side by side and are repeatedly bent, through the technical scheme, the plurality of heat exchange coil pipes are arranged in the tower body along the vertical direction, and each heat exchange coil pipe adopts a plurality of coiled pipes which are arranged side by side, so that the temperature difference stress is smaller, and the heat exchange efficiency is improved. The device is free of longitudinal stress, stable operation of the device is facilitated, the heat exchange coil enables liquid flow to be heated evenly under the cooperation of the liquid blocking grid and the liquid flow correcting device, multi-layer step-by-step heating is conducted, reaction is more stable, hydrolysis is more sufficient, maintenance is convenient, and the effective utilization rate of heat is greatly improved through control and adjustment of the liquid flow.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of chemical equipment, in particular to a kind of formic acid hydrolysis reactor. BACKGROUND

[0002] In prior art, domestic existing formic acid hydrolysis reactor is basically two kinds, A. two-stage tubular hydrolysis reactor series connection;B. reactor body has several sections of coil, above two kinds of reactor has following problem: the first kind of heat exchange tube is difficult to check, leakage point is not easy to find, increases the device parking risk, seriously affects device running cycle;Second, heat exchange tube section length is big, resistance is big, heat distribution is easy to be uneven, influence hydrolysis reaction;And above-mentioned two kinds all exist the problem of equipment longitudinal stress, bring security risk to equipment operation. CONTENT OF UTILITY MODEL

[0003] Therefore, the main purpose of the utility model is to provide a kind of formic acid hydrolysis reactor, through the technical scheme, several heat exchange coils are arranged in the tower body along the up and down direction, each heat exchange coil adopts several serpentine tubes and arranges side by side, so that the temperature difference stress is smaller, equipment longitudinal stress-free, be conducive to the stable operation of device, heat exchange coil is heated evenly under the cooperation of liquid flow rectifying device and liquid flow grid, and is gradually heated by multiple layers, reaction is more stable, hydrolysis is more sufficient, convenient for overhauling, and the effective utilization rate of heat is greatly improved by the control adjustment of liquid flow.

[0004] In order to achieve system safety and stability, reduce energy consumption, improve heat exchange efficiency, make heat evenly distributed, solve the problem of high system energy consumption, large temperature difference stress and difficult inspection and maintenance, the utility model designs a kind of formic acid hydrolysis reactor.

[0005] In order to achieve the above object, the technical scheme of the utility model is as follows: a formic acid hydrolysis reactor, including tower body, delivery pump, liquid pipeline, liquid inlet, liquid outlet and inlet distributor, the inlet distributor is arranged at the bottom of the tower body, the liquid inlet is arranged on the inlet distributor, the liquid pipeline is communicated with the input end of the delivery pump, the output end of the delivery pump is communicated with the liquid inlet, the liquid outlet is arranged on the upper position of the tower body, still include steam delivery pipeline, steam recovery pipeline, inlet pipe, front pipe box, heat exchange coil, rear pipe box and outlet pipe, the heat exchange coil is evenly distributed with a plurality of heat exchange coils from top to bottom in the tower body, the heat exchange coil is divided into two heat exchange zones, the heat exchange coil of two heat exchange zones is respectively composed of a plurality of serpentine pipes which are arranged side by side and repeatedly bent, the front pipe box is horizontally arranged at the middle position of one side in the tower body, one end of the plurality of serpentine pipes of two heat exchange zones is respectively communicated with the front pipe box side by side, two rear pipe boxes are horizontally arranged on the front and rear sides of the front pipe box in the tower body, the other end of the plurality of serpentine pipes of two heat exchange zones is respectively communicated with the rear pipe box of the corresponding position side by side, the inlet pipe and the outlet pipe are communicated with the corresponding front pipe box and rear pipe box respectively, the steam delivery pipeline and the steam recovery pipeline are communicated with the corresponding inlet pipe and outlet pipe respectively.

[0006] As a further technical scheme, the plurality of serpentine pipes in the two heat exchange zones of the heat exchange coil are respectively inclined downward from the middle to the front and rear sides.

[0007] As a further technical scheme, the interval spacing between adjacent serpentine pipes arranged side by side in the longitudinal direction in the two heat exchange zones of the heat exchange coil is 1.5 times the diameter of the serpentine pipe, and the column spacing between adjacent serpentine pipes arranged side by side in the transverse direction in the two heat exchange zones is 2.0 times the diameter of the serpentine pipe.

[0008] As a further technical scheme, it further includes a support ring, a support and a clamping plate, the support ring is fixed on the inner wall of the tower body corresponding to the heat exchange coil, a plurality of supports are horizontally arranged below the heat exchange coil in the transverse direction, the plurality of serpentine pipes arranged side by side in the heat exchange coil are fixed by the clamping plate and are respectively fixed on the corresponding supports by the fixing bolts, and the two ends of the support are respectively fixed on the support ring by the fixing bolts.

[0009] As a further technical scheme, it further includes a liquid blocking grid, the support ring is fixed on the inner wall of the tower body corresponding to the heat exchange coil, the liquid blocking grid is arranged at the transparent position beside the heat exchange coil, and the liquid blocking grid is fixed on the corresponding position of the support and the support ring below, and the interval spacing between two adjacent liquid blocking grid pieces is 2 times the diameter of the serpentine pipe.

[0010] As a further technical solution, further comprising liquid flow correction device, the liquid flow correction device is composed of liquid blocking box, steel sheet and silk screen, the liquid blocking box is in the form of box frame which is permeable from top to bottom, the steel sheet is arranged at the bottom and the top of the liquid blocking box respectively, several silk screens are laid between the two steel sheets of the liquid blocking box, a plurality of liquid blocking boxes are arranged in a circular plane above the corresponding heat exchange coil and liquid blocking grid in the tower body, the side of the liquid blocking box close to the inner wall of the tower body is arc-shaped which is consistent with the arc surface of the inner wall of the tower body, and in application, the liquid flow gap can be adjusted by replacing silk screens with different mesh numbers.

[0011] The beneficial effects after adopting the above technical solution are that: the formic acid hydrolysis reactor, through the technical solution, a plurality of heat exchange coils are arranged in the tower body in the up-down direction, each heat exchange coil is arranged by a plurality of serpentine pipes in parallel, so that the temperature difference stress is small, the equipment is free of stress in the longitudinal direction, the heat exchange coil is inclined downward on the two sides, so that the heat exchange steam runs more smoothly in the heat exchange coil, which is beneficial to stable operation of the device, the heat exchange coil is cooperated with the liquid blocking grid and the liquid flow correction device, so that the liquid flow is uniformly heated, and the reaction is more stable, the hydrolysis is more sufficient, the maintenance is convenient, and the effective utilization rate of heat is greatly improved through the control and adjustment of the liquid flow. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall sectional structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the top view structure of the heat exchange coil and the liquid blocking grid in the utility model.

[0014] Figure 3 It is a schematic diagram of the side view structure of the heat exchange coil in the utility model.

[0015] Figure 4 It is a schematic diagram of the top view structure of the liquid flow correction device in the utility model.

[0016] Figure 5 It is a schematic diagram of the sectional structure of the liquid blocking box in the liquid flow correction device of the utility model.

[0017] In the drawing, 1 is a tower body, 2 is a delivery pump, 3 is a liquid pipeline, 4 is an inlet, 5 is an outlet, 6 is an inlet distributor, 7 is a steam delivery pipeline, 8 is a steam recovery pipeline, 9 is an inlet pipe, 10 is a front pipe box, 11 is a heat exchange coil, 12 is a rear pipe box, 13 is an outlet pipe, 14 is a support ring, 15 is a support, 16 is a clamping plate, 17 is a liquid blocking grid, 18 is a liquid flow correction device, 19 is a liquid blocking box, 20 is a steel sheet, and 21 is a silk screen. DETAILED DESCRIPTION

[0018] The specific embodiments of the utility model will be further described in detail below with reference to the drawings.

[0019] AsFigures 1-2 As shown in the formula, the utility model relates to a formic acid hydrolysis reactor, including tower body 1, conveying pump 2, liquid pipeline 3, liquid inlet 4, liquid outlet 5 and import distributor 6, import distributor 6 sets up at tower body 1 bottom, liquid inlet 4 sets up on import distributor 6, liquid pipeline 3 is linked with the input end of conveying pump 2, and the output end of conveying pump 2 is linked with liquid inlet 4, liquid outlet 5 sets up on the upper position of tower body 1, still include steam conveying pipeline 7, steam recovery pipeline 8, import pipe 9, front pipe box 10, heat exchange coil 11, rear pipe box 12 and outlet pipe 13, heat exchange coil 11 is evenly distributed with several heat exchange coils 11 in tower body 1 from top to bottom, and heat exchange coil 11 is divided into front and rear two heat exchange zones, and the heat exchange coil 11 of two heat exchange zones is respectively formed by several respectively side by side set repeatedly bent serpentine pipes, front pipe box 10 is horizontally set up in the middle position on one side in tower body 1, and one end of the several serpentine pipes of two heat exchange zones is respectively side by side with front pipe box 10 fixed communication, and two rear pipe boxes 12 are horizontally set up in front pipe box 10 front and rear two sides in tower body 1, and the other end of the several serpentine pipes of two heat exchange zones is respectively side by side with the rear pipe box 12 of corresponding position fixed communication, import pipe 9 and outlet pipe 13 are linked with the corresponding front pipe box 10 and rear pipe box 12 respectively, and steam conveying pipeline 7 and steam recovery pipeline 8 are linked with the corresponding import pipe 9 and outlet pipe 13 respectively.

[0020] As shown in the formula, as further embodiment, the several serpentine pipes of two heat exchange zones in heat exchange coil 11 respectively present middle high front and rear two sides downward inclination. Figure 3

[0021] As further embodiment, the row spacing between adjacent serpentine pipes of two heat exchange zones in heat exchange coil 11 along longitudinal direction is respectively 1.5 times of serpentine pipe diameter, and the column spacing between adjacent serpentine pipes of two heat exchange zones along transverse direction is respectively 2.0 times of serpentine pipe diameter.

[0022] As further embodiment, still include support ring 14, support 15 and clamping plate 16, support ring 14 is fixed in the inner wall of corresponding tower body 1 in heat exchange coil 11, several supports 15 are respectively horizontally set below heat exchange coil 11 along transverse direction, and the several serpentine pipes of side by side set in heat exchange coil 11 are fixed by clamping plate 16 and are respectively fixed on the corresponding support 15 by fixed bolt, and the both ends of support 15 are respectively fixed on support ring 14 by fixed bolt.

[0023] ​As a further embodiment, a liquid baffle 17 is further included, the support ring 14 is fixed on the inner wall of the tower body 1 corresponding to the heat exchange coil 11, the liquid baffle 17 is arranged at a through position beside the heat exchange coil 11, the liquid baffle 17 is fixed below the support ring 14 and the support 15 at the corresponding position, and the spacing between two adjacent liquid baffles is 2 times of the diameter of the serpentine pipe.

[0024] As shown in Figure 4 and Figure 5 As a further embodiment, a liquid flow correction device 18 is further included, the liquid flow correction device 18 is composed of a liquid baffle box 19, a steel mesh 20 and a wire mesh 21, the liquid baffle box 19 is in the form of a box frame which is permeable from top to bottom, the steel mesh 20 is arranged at the bottom and the top of the liquid baffle box 19 respectively, a plurality of wire meshes 21 are arranged between the two steel meshes 20 of the liquid baffle box 19 respectively, a plurality of liquid baffle boxes 19 are arranged in a circular plane above the heat exchange coil 11 and the liquid baffle 17 corresponding to the heat exchange coil 11 in the tower body 1, and the side of the liquid baffle box 19 close to the inner wall of the tower body 1 is in the form of an arc which is matched with the arc surface of the inner wall of the tower body 1, and in application, the liquid flow gap can be adjusted by replacing the wire mesh 21 with different mesh numbers.

[0025] In the embodiment of the present application, the heat exchange coil 11 of each layer is divided into two zones, the input ends of the heat exchange coils 11 of the two zones are connected to the corresponding front pipe box 10, the output ends of the heat exchange coils 11 of the two zones are connected to the corresponding rear pipe box 12 respectively, and the center line of the tower body 1 is taken as a boundary; the heat exchange coil 11 is inclined downward by 1° on both sides.

[0026] In the working process of the present application, the conveying pump 2 uniformly distributes the liquid to the bottom of the tower body 1 through the liquid pipeline 3 and the inlet distributor 6 at a certain speed, and makes the liquid uniformly rise from the bottom to the top of the tower body 1 at a certain speed, the conveying pump 2 is a variable frequency motor, so that the flow rate can be effectively controlled, the rising speed of the liquid flow in the tower body 1 is controlled, the liquid flow can rise at a required speed, and the liquid flow is more stable, the liquid flow passes through the heat exchange coil 11, the liquid baffle 17 and the liquid flow correction device 18 in sequence, and at the same time, the reaction of the liquid flow passing through the heat exchange coil 11 is more uniform, and the liquid is discharged from the tower body 1 through the outlet 5.

[0027] The above is only a preferred and feasible embodiment of the present application, and is not used to limit the protection scope of the present application.

Claims

1. A formic acid hydrolysis reactor comprising a tower body, a delivery pump, a liquid pipe, a liquid inlet, a liquid outlet and an inlet distributor, the inlet distributor is arranged at the bottom of the tower body, the liquid inlet is arranged on the inlet distributor, the liquid pipe is communicated with the input end of the delivery pump, the output end of the delivery pump is communicated with the liquid inlet, the liquid outlet is arranged at the upper position of the tower body, characterized in that, It also includes steam delivery pipeline, steam recovery pipeline, import pipe, front pipe box, heat exchange coil, rear pipe box and export pipe, the heat exchange coil is uniformly distributed by several heat exchange coils from top to bottom in the tower body, the heat exchange coil is divided into front and rear heat exchange zones, the heat exchange coils of the two heat exchange zones are respectively composed of several serpentine pipes arranged side by side and repeatedly bent, the front pipe box is horizontally arranged at the middle position of one side in the tower body, one end of the several serpentine pipes of the two heat exchange zones is respectively communicated with the front pipe box side by side, the two rear pipe boxes are horizontally arranged on the front and rear sides of the front pipe box in the tower body, the other end of the several serpentine pipes of the two heat exchange zones is respectively communicated with the rear pipe box at the corresponding position side by side, the import pipe and the export pipe are respectively communicated with the corresponding front pipe box and rear pipe box, the steam delivery pipeline and the steam recovery pipeline are respectively communicated with the corresponding import pipe and export pipe.

2. The formic acid hydrolysis reactor of claim 1, wherein, The several serpentine pipes of the two heat exchange zones in the heat exchange coil are respectively inclined downward from high in the middle to low on both sides.

3. The formic acid hydrolysis reactor of claim 1, wherein, The row spacing between the adjacent serpentine pipes arranged side by side in the longitudinal direction of the two heat exchange zones in the heat exchange coil is 1.5 times the diameter of the serpentine pipe, and the column spacing between the adjacent serpentine pipes arranged side by side in the transverse direction of the two heat exchange zones is 2.0 times the diameter of the serpentine pipe.

4. The formic acid hydrolysis reactor of claim 1, wherein, It also includes a support ring, a support and a clamping plate, the support ring is fixed on the inner wall of the tower body corresponding to the heat exchange coil, several supports are horizontally arranged below the heat exchange coil in the transverse direction, the several serpentine pipes arranged side by side in the heat exchange coil are fixed by the clamping plate and are respectively fixed on the corresponding supports by fixing bolts, and the two ends of the support are respectively fixed on the support ring by fixing bolts.

5. The formic acid hydrolysis reactor of claim 4, wherein, It also includes a liquid barrier grid, the liquid barrier grid is arranged at a transparent position beside the heat exchange coil, and is fixed on the corresponding supports and support rings below, the spacing between two adjacent liquid barrier grid pieces is respectively 2 times the diameter of the serpentine pipe.

6. The formic acid hydrolysis reactor of claim 1, wherein, It also includes a liquid flow correction device, the liquid flow correction device is composed of a liquid barrier box, a steel mesh and a silk screen, the liquid barrier box is in the form of a box frame which is transparent from top to bottom, the steel mesh is arranged at the bottom and the top of the liquid barrier box respectively, several silk screens are laid between the two steel meshes of the liquid barrier box, a plurality of liquid barrier boxes are arranged in a circular plane above the corresponding heat exchange coils and liquid barrier grids in the tower body, one side of the liquid barrier box close to the inner wall of the tower body is arc-shaped and matches the arc surface of the inner wall of the tower body, and in application, the liquid flow gap can be adjusted by replacing silk screens with different mesh numbers.

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