Device and reaction net capable of realizing multiple gas supply working conditions in ammonium polyphosphate production process

Abstract

The utility model discloses a device capable of realizing various gas supply working conditions in an ammonium polyphosphate production process and an ammonium polyphosphate production reaction net, which comprise a front process gas inlet pipe and a rear process gas inlet pipe, a process gas main stop valve is arranged on the front process gas inlet pipe, and a process gas main stop valve is arranged on the rear process gas inlet pipe. The device capable of realizing various gas supply working conditions in the ammonium polyphosphate production process further comprises n process gas flow control units which are connected in parallel between the front process gas inlet pipe and the rear process gas inlet pipe, and n is an integer greater than 2. Various gas supply working conditions can be achieved without dozens of regulating valves and PLC control, and the gas supply system is simple, low in investment cost, small in later-stage maintenance amount and low in maintenance cost.

Description

Technical Field

[0001] The utility model relates to ammonium polyphosphate production, in particular to a device capable of realizing various gas supply working conditions in the ammonium polyphosphate production process and an ammonium polyphosphate production reaction network. Background Art

[0002] In the production process of ammonium polyphosphate, the polymerization reaction temperature can reach 200-350℃. Without maintaining a reasonable process gas pressure and flow rate, ammonium polyphosphate is easy to decompose and it is difficult to reach a degree of polymerization of more than 1000. In order to ensure that ammonium polyphosphate does not decompose under high temperature conditions, especially in the production of ammonium polyphosphate type II flame retardant products, in order to ensure that the degree of polymerization reaches more than 1000 and the ideal type II crystallization, it is necessary to maintain different process gas pressures and flows in the reactor at several different reaction temperatures; usually, it is necessary to maintain a process gas pressure of 2.0-4.0kg / cm2 and a flow rate of 2-40m3 / h at different temperatures.

[0003] In the industrial production of ammonium polyphosphate, the number of reactors involved ranges from a dozen to dozens. Although different process gas pressure and flow control can be achieved by setting proportional differential control valves, the control system requires dozens of control valves and PLC control, and the system is complex, with high investment costs, large amounts of subsequent maintenance, and high maintenance costs. Utility Model Content

[0004] In view of the above-mentioned defects, the utility model provides a device which can realize a variety of gas supply conditions in the production process of ammonium polyphosphate. It does not require dozens of regulating valves and PLC control to realize a variety of gas supply conditions. It is simple, has low investment cost, small amount of later maintenance, and low maintenance cost.

[0005] A device capable of realizing various gas supply conditions during the production of ammonium polyphosphate comprises a front process gas inlet pipe and a rear process gas inlet pipe, wherein a process gas main shut-off valve is installed on the front process gas inlet pipe. The device capable of realizing various gas supply conditions during the production of ammonium polyphosphate also comprises n process gas flow control units, which are connected in parallel between the front process gas inlet pipe and the rear process gas inlet pipe, and the n process gas flow control units comprise a first process gas flow control unit, a second process gas flow control unit, a third process gas flow control unit…an nth process gas flow control unit, a front process gas inlet pipe, the first process gas flow control unit comprises a first flow meter and a first process gas shut-off valve connected in series, the second process gas flow control unit comprises a second flow meter and a second process gas shut-off valve connected in series, the third process gas flow control unit comprises a third flow meter and a third process gas shut-off valve connected in series,…the nth process gas flow control unit comprises an nth flow meter and an nth process gas shut-off valve connected in series, and n is an integer greater than 2.

[0006] In one or more optional embodiments of the present invention, n is 3.

[0007] In one or more optional embodiments of the present invention, the process gas main shut-off valve, the first process gas shut-off valve, the second process gas shut-off valve, the third process gas shut-off valve, ... the nth process gas shut-off valve are all solenoid valves.

[0008] In one or more optional implementations of the present invention, the first flow meter, the second flow meter, the third flow meter, ... the nth flow meter are all rotor flow meters.

[0009] In one or more optional embodiments of the present invention, the first process gas flow control unit also includes a first process gas flow manual regulating valve connected in series, the second process gas flow control unit also includes a second process gas flow manual regulating valve connected in series, the third process gas flow control unit also includes a third process gas flow manual regulating valve connected in series, ... the nth process gas flow control unit also includes an nth process gas flow manual regulating valve connected in series.

[0010] The utility model also provides an ammonium polyphosphate production reaction network.

[0011] A polyammonium phosphate production reaction network comprises m reactors, where m is an integer greater than 2, and each reactor is connected to a device capable of realizing a variety of gas supply conditions in the polyammonium phosphate production process.

[0012] In one or more optional embodiments of the present invention, m is an integer of 10-60.

[0013] Beneficial effects of the invention: The utility model can realize a variety of gas supply conditions by setting up a device that can realize a variety of gas supply conditions, without the need for dozens of regulating valves and PLC control, and can realize a variety of gas supply conditions intermittently, with low investment cost, small amount of later maintenance, and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a device capable of realizing various gas supply conditions during the production of ammonium polyphosphate in Example 1 of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of a device capable of realizing various gas supply conditions during the production of ammonium polyphosphate in Example 2 of the utility model;

[0016] In the figure: 1. front process gas inlet pipe, 11. process gas main shut-off valve, 12. process gas manual main shut-off valve, 2. rear process gas inlet pipe, 3. first process gas flow control unit, 31. first flow meter, 32. first process gas shut-off valve, 33. first process gas flow manual regulating valve, 4. second process gas flow control unit, 41. second flow meter, 42. second process gas shut-off valve, 43. second process gas flow manual regulating valve, 5. third process gas flow control unit, 51. third flow meter, 52. third process gas shut-off valve, 53. third process gas flow manual regulating valve. DETAILED DESCRIPTION

[0017] The present application will be further described below.

[0018] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Example 1

[0021] Please refer to Figure 1 , Figure 1 It is a schematic diagram of the overall structure of the device that can realize various gas supply conditions in the ammonium polyphosphate production process of this embodiment.

[0022] A device capable of realizing a variety of gas supply conditions in the production process of ammonium polyphosphate comprises a front process gas inlet pipe 1, a rear process gas inlet pipe 2 and n process gas flow control units, wherein the n process gas flow control units are connected in parallel between the front process gas inlet pipe 1 and the rear process gas inlet pipe 2, the n process gas flow control units comprise a first process gas flow control unit 3, a second process gas flow control unit 4, a third process gas flow control unit 5 ... an nth process gas flow control unit, a front process gas inlet pipe 1, a process gas main shut-off valve 11 being installed on the front process gas inlet pipe 1, the first process gas flow control unit 3 comprises a first flow meter 31 and a first process gas shut-off valve 32 connected in series, the second process gas flow control unit 4 comprises a second flow meter 41 and a second process gas shut-off valve 42 connected in series, the third process gas flow control unit 5 comprises a third flow meter 51 and a third process gas shut-off valve 52 connected in series, ... the nth process gas flow control unit comprises an nth flow meter and an nth process gas shut-off valve connected in series, and n is an integer greater than 2.

[0023] When the device is connected to the reactor it controls, if the reaction process of the reactor is different in different time periods, such as low flow in the first stage, high flow in the second stage, and low flow in the last stage, in the first stage, the first process gas flow control unit 3 is connected and turned on to meet the gas flow demand of the reaction, and in the second stage, only turning on the first process gas flow control unit 3 does not meet the demand. At this time, turning on the second process gas flow control unit 4 meets the process requirements of the reactor, and so on. When a device that can realize multiple gas supply conditions in the production process of ammonium polyphosphate is added to the reaction process, the process gas supply control of various conditions can be realized through the combination of process gas flow control units.

[0024] In one or more specific embodiments of the present invention, n is 3.

[0025] In one or more specific embodiments of the present invention, the process gas main shut-off valve 11, the first process gas shut-off valve 32, the second process gas shut-off valve 42, the third process gas shut-off valve 52, ... the nth process gas shut-off valve are all solenoid valves.

[0026] In one or more specific implementations of the present invention, the first flow meter 31, the second flow meter 41, the third flow meter 51, ... the nth flow meter are all rotor flow meters.

[0027] Example 2

[0028] Please refer to Figure 2 , Figure 2It is a schematic diagram of the overall structure of the device that can realize various gas supply conditions in the ammonium polyphosphate production process of this embodiment.

[0029] A device capable of realizing multiple gas supply conditions in the production process of ammonium polyphosphate, comprising a front process gas inlet pipe 1, a rear process gas inlet pipe 2 and n process gas flow control units, wherein the n process gas flow control units are connected in parallel to the front process gas inlet pipe 1 and the rear process gas inlet pipe 2, the n process gas flow control units comprising a first process gas flow control unit 3, a second process gas flow control unit 4, a third process gas flow control unit 5 ... the nth process gas flow control unit, a front process gas inlet pipe 1, a process gas main shut-off valve 11 and a process gas manual main shut-off valve 12 are installed in series on the front process gas inlet pipe 1, the first process gas The flow control unit 3 includes a first flow meter 31, a first process gas flow manual regulating valve 33 and a first process gas shut-off valve 32 connected in series, the second process gas flow control unit 4 includes a second flow meter 41, a second process gas flow manual regulating valve 43 and a second process gas shut-off valve 42 connected in series, the third process gas flow control unit 5 includes a third flow meter 51, a third process gas flow manual regulating valve 53 and a third process gas shut-off valve 52 connected in series, ... the nth process gas flow control unit includes an nth flow meter, an nth process gas flow manual regulating valve and an nth process gas shut-off valve connected in series, where n is an integer greater than 2.

[0030] When the device is connected to the reactor it controls, if the reaction process of the reactor is different in different time periods, such as low flow in the first stage, high flow in the second stage, and low flow in the last stage, in the first stage, the first process gas flow control unit 3 is connected and turned on to meet the gas flow demand of the reaction, and in the second stage, only turning on the first process gas flow control unit 3 does not meet the demand. At this time, turning on the second process gas flow control unit 4 meets the process requirements of the reactor, and so on. When a device that can realize multiple gas supply conditions in the production process of ammonium polyphosphate is added to the reaction process, the process gas supply control of various different working conditions can be realized through the combination of process gas flow control units. When it is necessary to adjust the flow of the first flow meter 31, the second flow meter 41, the third flow meter 51, ... the nth flow meter in order to adapt to more complex working conditions, it can be adjusted through the first process gas flow manual regulating valve 33, the second process gas flow manual regulating valve 43, the third process gas flow manual regulating valve 53, ... the nth process gas flow manual regulating valve.

[0031] In one or more specific embodiments of the present invention, n is 3.

[0032] In one or more specific embodiments of the present invention, the process gas main shut-off valve 11, the first process gas shut-off valve 32, the second process gas shut-off valve 42, the third process gas shut-off valve 52, ... the nth process gas shut-off valve are all solenoid valves.

[0033] In one or more specific implementations of the present invention, the first flow meter 31, the second flow meter 41, the third flow meter 51, ... the nth flow meter are all rotor flow meters.

[0034] Example 3

[0035] A polyammonium phosphate production reaction network comprises m reactors, each reactor being connected to a device capable of realizing a variety of gas supply conditions in the polyammonium phosphate production process according to any one of Embodiment 1 or Embodiment 2, wherein m is an integer greater than 2.

[0036] In one or more specific embodiments of the present invention, m is an integer of 10-60.

[0037] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device capable of realizing various gas supply conditions in the production process of ammonium polyphosphate, comprising a front process gas inlet pipe (1) and a rear process gas inlet pipe (2), wherein a process gas main shut-off valve (11) is installed on the front process gas inlet pipe (1), and characterized in that: The device capable of realizing a variety of gas supply conditions during the ammonium polyphosphate production process also includes n process gas flow control units, which are connected in parallel between a front process gas inlet pipe (1) and a rear process gas inlet pipe (2), and the n process gas flow control units include a first process gas flow control unit (3), a second process gas flow control unit (4), a third process gas flow control unit (5) ... the nth process gas flow control unit, the front process gas inlet pipe (1), the first process gas flow control unit (3) includes a first flow meter (31) and a first process gas shut-off valve (32) connected in series, the second process gas flow control unit (4) includes a second flow meter (41) and a second process gas shut-off valve (42) connected in series, the third process gas flow control unit (5) includes a third flow meter (51) and a third process gas shut-off valve (52) connected in series, ... the nth process gas flow control unit includes an nth flow meter and an nth process gas shut-off valve connected in series, and n is an integer greater than 2.

2. The device for realizing multiple gas supply conditions in the ammonium polyphosphate production process according to claim 1, characterized in that: n is 3.

3. The device for realizing multiple gas supply conditions in the ammonium polyphosphate production process according to claim 1, characterized in that: The process gas main shut-off valve (11), the first process gas shut-off valve (32), the second process gas shut-off valve (42), the third process gas shut-off valve (52), ... the nth process gas shut-off valve are all solenoid valves.

4. The device for realizing multiple gas supply conditions in the ammonium polyphosphate production process according to claim 1, characterized in that: The first flow meter (31), the second flow meter (41), the third flow meter (51), ... the nth flow meter are all rotor flow meters.

5. The device for realizing multiple gas supply conditions in the ammonium polyphosphate production process according to any one of claims 1 to 4, characterized in that: The first process gas flow control unit (3) also includes a first process gas flow manual regulating valve (33) connected in series, the second process gas flow control unit (4) also includes a second process gas flow manual regulating valve (43) connected in series, the third process gas flow control unit (5) also includes a third process gas flow manual regulating valve (53) connected in series, ... the nth process gas flow control unit also includes an nth process gas flow manual regulating valve connected in series.

6. An ammonium polyphosphate production reaction network, comprising m reactors, where m is an integer greater than 2, characterized in that: Each reactor is connected to a device capable of realizing multiple gas supply conditions in the ammonium polyphosphate production process as described in any one of claims 1 to 5.

7. The ammonium polyphosphate production reaction network according to claim 6, characterized in that: m is an integer from 10 to 60.

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