CN216964566U - Safety device for preventing material from being reversed - Google Patents
Safety device for preventing material from being reversed Download PDFInfo
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- CN216964566U CN216964566U CN202220006683.1U CN202220006683U CN216964566U CN 216964566 U CN216964566 U CN 216964566U CN 202220006683 U CN202220006683 U CN 202220006683U CN 216964566 U CN216964566 U CN 216964566U
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Abstract
The utility model provides a safety device for preventing materials from channeling reversely, and relates to the technical field of chemical production. The device comprises a raw material storage tank and a reaction kettle, wherein a feeding pipeline is communicated with the raw material storage tank and the reaction kettle, a differential pressure linkage cut-off valve is arranged on the feeding pipeline and comprises a cut-off valve arranged on the feeding pipeline and two pressure measuring mechanisms respectively arranged on the raw material storage tank and the reaction kettle, the cut-off valve and the two pressure measuring mechanisms are electrically connected with a processor, and the processor controls the cut-off valve to be opened and closed according to the pressure difference value between the raw material storage tank and the reaction kettle.
Description
Technical Field
The utility model relates to the technical field of chemical production, in particular to a safety device for preventing materials from channeling reversely.
Background
In chemical production, especially in the polymerization reaction process, because of the great difficulty of pressure control of polymerization reaction and the fact that abnormal conditions lead to the unable effective control of pressure, cause easily that the interior material of high-pressure batch autoclave enters the cauldron pipeline from the raw materials and flees back to the raw materials storage tank in the anti-cauldron pipeline, cause a large amount of reaction raw materials in the raw materials storage tank and the material that flees back to take place violent reaction in the raw materials storage tank, lead to the emergence of raw materials storage tank explosion accident.
At present, aiming at the potential safety hazard of the type of safety accidents in design, the mode of designing a one-way check valve on a feed pipeline of a reaction kettle is generally adopted for solving. The method aims at materials which are easy to self-gather or block and materials which are unstable in medium flowing in a pipeline, and the like, the one-way check valve is very easy to block, or the check valve is frequently opened and closed due to unstable media, so that the sealing surface of the check valve is damaged, the check valve cannot be sealed or the sealing surface is damaged, the collision is easy to cause sparks, the detonation or explosion of flammable and explosive media in a pipeline is caused, and the safety accident is caused, and needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to develop a safety device for preventing material reverse flow, which cuts off material conveying in advance before the material reverse flow enters a raw material storage tank due to the out-of-control pressure of a reaction kettle.
The utility model is realized by the following technical scheme:
a safety device for preventing reverse flow of material, comprising:
a raw material storage tank;
a reaction kettle;
the feeding pipeline is communicated with the raw material storage tank and the reaction kettle;
the pressure difference interlocking cut-off valve is arranged on the feeding pipeline;
wherein, the chain shut-off valve of pressure differential is including locating the trip valve on the feeding pipeline and locating two pressure measurement mechanism on raw materials storage tank and reation kettle respectively, trip valve and two pressure measurement mechanism and treater electric connection, the treater is according to opening and close of raw materials storage tank and reation kettle's pressure difference value control trip valve.
Optionally, the pressure difference between the raw material storage tank and the reaction kettle is greater than 0.3Mpa, and the processor controls the cut-off valve to open so as to keep conveying the materials in the feeding pipeline.
Optionally, the pressure difference between the raw material storage tank and the reaction kettle is less than 0.3Mpa, and the processor controls the shut-off valve to be closed to cut off the material conveying in the feeding pipeline.
Optionally, the pressure difference between the raw material storage tank and the reaction kettle is equal to 0.3Mpa, and the processor controls the opening or closing of the cut-off valve.
Optionally, the pressure measuring mechanism is a pressure gauge.
Optionally, a regulating valve is arranged on the feeding pipeline on one side, away from the material conveying direction, of the stop valve.
Optionally, a manual valve is arranged on the feeding line on one side of the regulating valve away from the material conveying direction.
Optionally, the shut-off valve is a pneumatic shut-off valve.
The utility model has the beneficial effects that:
the utility model has the advantages of energy saving, compact design, safety and high efficiency, ensures smooth process flow, reasonable equipment arrangement, accurate reaction and high safety in chemical production, timely cuts off the material conveying of a feeding pipeline before the material is reversed due to the out-of-control pressure in a reaction kettle, and avoids serious consequences.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of the present invention.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments may be modified in various different ways, without departing from the spirit or scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the creation of the present invention can be understood according to specific situations by those of ordinary skill in the art.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in figure 1, the utility model discloses a safety device for preventing materials from flowing backwards, which comprises a raw material storage tank 1 and a reaction kettle, wherein a feeding pipeline is arranged between the raw material storage tank 1 and the reaction kettle, and a manual valve 2, a regulating valve 3 and a differential pressure interlocking cut-off valve 4 are sequentially arranged on the feeding pipeline according to the material conveying direction. The 4 doors of the pressure difference interlocking cut-off valve comprise a cut-off valve 4 arranged on a feeding pipeline and pressure gauges 6 arranged on the reaction kettle and the raw material storage tank 1, the pressure gauges 6, the cut-off valve 4 and a processor are electrically connected, the two pressure gauges 6 feed back the pressure in the raw material storage tank 1 and the reaction kettle to the processor, and the processor controls the opening and closing of the cut-off valve 4 according to the pressure difference between the raw material storage tank 1 and the reaction kettle.
The shut-off valve 4 takes the difference value between the pressure of the raw material storage tank 1 and the pressure of the reaction kettle as a valve closing instruction, the shut-off valve 4 is in an open state in a normal production state, and when a certain pressure is reached in the reaction kettle, the shut-off valve 4 is closed after the difference value between the pressure of the raw material storage tank 1 at the front stage of the reaction kettle and the pressure of the reaction kettle is reduced to a certain value. The shut-off valve 4 is a pneumatic shut-off valve 4, adopts gas as a power source, prevents the risk of safety accidents caused by using an electric valve in an explosion-proof area, and is environment-friendly and energy-saving because air is used as power.
The pressure in the raw material tank 1 was A1, the pressure in the reaction vessel was A2, and the differential pressure of the operation of the shutoff valve 4 was set to 0.3 MPa. At a1-a2=0.3Mpa, the shut-off valve 4 may be calibrated to an open state to maintain material transport through the feed line, and the shut-off valve 4 may also be calibrated to a closed state to shut off material transport through the feed line.
When the reaction is normal, A1=2.2MPa, A2=1.8MPa, the pressure difference between the raw material storage tank 1 and the reaction kettle is A1-A2=0.4MPa, the pressure difference is greater than the set 0.3MPa, the shut-off valve 4 is in an open state, and the feeding pipeline is normally fed.
The pressure in the reaction kettle rises due to the loss of control of various reasons, when A2=1.91MPa, A1-A2=0.29MPa, A1-A2 < 0.3MPa, the set closing condition of the stop valve 4 is reached, the stop valve 4 is closed, the feeding pipeline stops conveying and is cut off, and then, even if A2 rises to 2.3MPa along with the loss of control of the pressure in the reaction kettle, although A2 is greater than A1, the feeding pipeline is already cut off by the stop valve 4, and the material is prevented from reversely flowing into the raw material storage tank 1, thereby causing serious consequences.
The utility model has the advantages of energy saving, compact design, safety and high efficiency, ensures smooth process flow, reasonable equipment arrangement, accurate reaction and high safety in chemical production, timely cuts off the material conveying of a feeding pipeline before the material is reversed due to the out-of-control pressure in a reaction kettle, and avoids serious consequences.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.
Claims (8)
1. A safety device for preventing material from flowing backwards, comprising:
a raw material storage tank;
a reaction kettle;
the feeding pipeline is communicated with the raw material storage tank and the reaction kettle;
the pressure difference interlocking cut-off valve is arranged on the feeding pipeline;
wherein, the chain shut-off valve of pressure differential is including locating the trip valve on the feeding pipeline and locating two pressure measurement mechanism on raw materials storage tank and reation kettle respectively, trip valve and two pressure measurement mechanism and treater electric connection, the treater is according to opening and close of raw materials storage tank and reation kettle's pressure difference value control trip valve.
2. The apparatus as claimed in claim 1, wherein the pressure difference between the raw material storage tank and the reaction vessel is greater than 0.3Mpa, and the processor controls the shut-off valve to open to maintain the normal transportation of the material in the feed line.
3. The apparatus according to claim 1, wherein the pressure difference between the raw material storage tank and the reaction vessel is less than 0.3Mpa, and the processor controls the shut-off valve to close to shut off the material in the feed line.
4. The safety device for preventing the reverse flow of materials according to claim 2 or 3, wherein the pressure difference between the raw material storage tank and the reaction kettle is equal to 0.3MPa, and the processor controls the opening or closing of the cut-off valve.
5. A safety device against material channeling as defined in claim 1, wherein said pressure measuring mechanism is a pressure gauge.
6. A safety device for preventing the reverse flow of materials according to claim 1, wherein the feed pipe on the side of the cut-off valve away from the material conveying direction is provided with a regulating valve.
7. A safety arrangement for preventing the reverse movement of material according to claim 6, wherein the regulating valve is provided with a manual valve on the feed line on the side away from the direction of material transport.
8. A material blowback prevention safety device as claimed in claim 1, wherein said shut-off valve is a pneumatic shut-off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220006683.1U CN216964566U (en) | 2022-01-05 | 2022-01-05 | Safety device for preventing material from being reversed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220006683.1U CN216964566U (en) | 2022-01-05 | 2022-01-05 | Safety device for preventing material from being reversed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216964566U true CN216964566U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220006683.1U Active CN216964566U (en) | 2022-01-05 | 2022-01-05 | Safety device for preventing material from being reversed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216964566U (en) |
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2022
- 2022-01-05 CN CN202220006683.1U patent/CN216964566U/en active Active
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