CN214553491U - Chemical reaction system using solid phosgene - Google Patents
Chemical reaction system using solid phosgene Download PDFInfo
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- CN214553491U CN214553491U CN202023238673.0U CN202023238673U CN214553491U CN 214553491 U CN214553491 U CN 214553491U CN 202023238673 U CN202023238673 U CN 202023238673U CN 214553491 U CN214553491 U CN 214553491U
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Abstract
The utility model relates to an use chemical reaction system of solid phosgene includes the reaction unit of two sets of series connection, and it specifically includes reation kettle I, vapour and liquid separator I, one-level absorption cauldron I, second grade absorption cauldron I, reation kettle II, vapour and liquid separator II, one-level absorption cauldron II and second grade absorption cauldron II. The system can rapidly carry out chemical reactions participated by various solid phosgene in large batch in production, can fully utilize phosgene generated by solidified phosgene, can recover and use phosgene generated and overflowed in the reaction of the solid phosgene to the maximum extent, and industrial waste gas discharged by the system only contains a trace amount of phosgene and can be discharged into a subsequent waste gas treatment system for harmless treatment. The device can give full play to the characteristics of the solid phosgene, so that the reaction participated in by the device can be operated safely and efficiently.
Description
Technical Field
The utility model belongs to the chemical industry equipment field, concretely relates to use solid phosgene's chemical reaction system.
Background
Solid phosgene, also known as bis (trichloromethyl) carbonate or BTC, is a stable solid compound that can be stored hermetically at room temperature and decomposes only a trace amount of phosgene and liquid phosgene even at boiling. The solid phosgene is a substance with extremely high reaction activity, can completely replace virulent phosgene and diphosgene in chemical reaction, and mainly can participate in the following reaction types: chloromethylation, carbonation, carbamidation, isocyanation, chlorination, isonitrification, cyclization, alpha-chlorochloromethylation of aldehyde, oxidation of alcohol, etc.
In the chemical reaction using the solid phosgene, the solid phosgene can generate some phosgene to enter into reaction gas, and if the phosgene is not reasonably applied, not only can bring danger to production, but also can cause waste of reaction raw materials, and also can seriously affect the treatment effect of an exhaust gas treatment system of an enterprise.
Disclosure of Invention
The utility model aims at providing a chemical reaction system which can make full use of phosgene generated by curing phosgene in production on the basis of the prior art.
The technical scheme of the utility model as follows:
a chemical reaction system using solid phosgene comprises
The reaction kettle I is provided with a condensing pipe I and a condenser I at the upper part, and an outlet of the condenser I is provided with a return pipe I;
the inlet of the gas-liquid separator I is connected with the outlet of the return pipe I, the upper part of the gas-liquid separator I is provided with a gas outlet connected with the inlet of the separation gas pipe I, the lower part of the gas-liquid separator I is provided with a liquid outlet connected with the inlet of the separation liquid pipe I, and the outlet of the separation liquid pipe I is communicated with the reaction kettle I;
the first-stage absorption kettle I is used for absorbing phosgene in reaction gas through a solvent introduced into the kettle, a gas inlet used for introducing into the separation gas pipe I is formed in the upper part of the first-stage absorption kettle I, a gas outlet and solvent inlet is formed in the upper part of the first-stage absorption kettle I, the gas outlet and solvent inlet is communicated with a gas outlet pipe I and a solvent inlet pipe I of the first-stage absorption kettle I, a backflow port is formed in the lower part of the first-stage absorption kettle I, the backflow port is connected with an inlet of a backflow pipe I of the absorption kettle, and an outlet of the backflow pipe I of the absorption kettle is communicated with the reaction kettle I;
the second-stage absorption kettle I is used for secondarily absorbing phosgene in reaction gas through a solvent in the kettle, the upper part of the second-stage absorption kettle I is provided with a gas inlet for leading into a second-stage absorption kettle gas inlet pipe I, the second-stage absorption kettle gas inlet pipe I is communicated with a first-stage absorption kettle gas outlet pipe I, and the bottom of the second-stage absorption kettle is provided with a liquid outlet connected with a second-stage absorption kettle discharge pipe;
a condensation pipe II and a condenser II are arranged at the upper part of the reaction kettle II, a return pipe II is arranged at the outlet of the condenser II, and a feed port of the reaction kettle II is communicated with a discharge pipe I of the secondary absorption kettle;
the inlet of the gas-liquid separator II is connected with the outlet of the return pipe II, the upper part of the gas-liquid separator II is provided with a gas outlet connected with the inlet of the separation gas pipe II, the lower part of the gas-liquid separator II is provided with a liquid outlet connected with the inlet of the separation liquid pipe II, and the outlet of the separation liquid pipe II is communicated with the reaction kettle II;
the first-stage absorption kettle II is used for absorbing phosgene in reaction gas through a solvent introduced into the kettle, a gas inlet used for introducing the separation gas pipe II is formed in the upper part of the first-stage absorption kettle II, a gas outlet and solvent inlet is formed in the upper part of the first-stage absorption kettle II, the gas outlet and solvent inlet is communicated with a gas outlet pipe II and a solvent inlet pipe II of the first-stage absorption kettle II, a backflow port is formed in the lower part of the first-stage absorption kettle II, the backflow port is connected with an inlet of a backflow pipe II of the absorption kettle, and an outlet of the backflow pipe II of the absorption kettle is communicated with the reaction kettle II; and
and the second-stage absorption kettle II is used for secondarily absorbing phosgene in the reaction gas through a solvent in the kettle, an air inlet used for introducing the second-stage absorption kettle air inlet pipe II is formed in the upper part of the second-stage absorption kettle II, and the second-stage absorption kettle air inlet pipe II is communicated with the first-stage absorption kettle air outlet pipe II.
The device is provided with a stirrer I for stirring in the reaction kettle I, and a glass tube sight glass I is arranged on a return tube I.
The separation liquid pipe I in the device comprises a section of U-shaped pipe.
In the device, a gas inlet pipe I of the secondary absorption kettle is communicated with a separation gas pipe I through a valve.
This device is equipped with the gas outlet that is connected with second grade absorption cauldron outlet duct I on second grade absorption cauldron I's upper portion, is equipped with the liquid outlet that is connected with second grade absorption cauldron discharging pipe I in second grade absorption cauldron I's bottom.
In the device, a stirrer II for stirring in the reaction kettle is arranged on a reaction kettle II, and a glass tube sight glass II is arranged on a return tube II.
The separation liquid pipe II in the device comprises a section of U-shaped pipe.
In the device, a secondary absorption kettle air inlet pipe II is communicated with a separation gas pipe II through a valve.
This device is equipped with the gas outlet that is connected with second grade absorption cauldron outlet duct II on second grade absorption cauldron II's upper portion, is equipped with the liquid outlet that is connected with second grade absorption cauldron discharging pipe II in second grade absorption cauldron II's bottom.
Adopt the technical scheme of the utility model, the advantage is as follows:
the utility model provides an use chemical reaction system of solid phosgene, it can carry out the chemical reaction that various solid phosgene participated in fast, large batch ground in production, can the produced phosgene of make full use of solidification phosgene, can retrieve and use the phosgene that solid phosgene reaction produced and overflowed in the at utmost, only contain trace phosgene in this system exhaust industrial waste gas, can discharge into and carry out innocent treatment in the subsequent exhaust-gas treatment system. The device can give full play to the characteristics of the solid phosgene, so that the reaction participated in by the device can be operated safely and efficiently, and the pressure of subsequent waste gas treatment is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure, 101-reaction kettles I, 102-stirrers I, 103-condenser pipes I, 104-condensers I, 105-return pipes I, 106-glass tube sight glasses I, 107-gas-liquid separators I, 109-separation liquid pipes I, 110-separation gas pipes I, 111-first-stage absorption kettles I, 112-absorption kettle return pipes I, 114-solvent feeding pipes I, 115-first-stage absorption kettle gas outlet pipes I, 116-second-stage absorption kettle gas inlet pipes I, 117-second-stage absorption kettles I, 118-second-stage absorption kettle gas outlet pipes I, 119-second-stage absorption kettle gas outlet pipes I, 201-reaction kettles II, 202-stirrers II, 203-condenser pipes II, 204-condenser II, 205-return pipes II, 206-glass tube sight glasses II, 207-gas-liquid separators II, 209-separation liquid pipe II, 210-separation gas pipe II, 211-first-stage absorption kettle II, 212-absorption kettle return pipe II, 214-solvent feeding pipe II, 215-first-stage absorption kettle gas outlet pipe II, 216-second-stage absorption kettle gas inlet pipe II, 217-second-stage absorption kettle II, 218-second-stage absorption kettle gas outlet pipe II, 219-second-stage absorption kettle discharging pipe II.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the invention in any way.
As shown in the figure, the utility model discloses an use chemical reaction system of solid phosgene includes the reaction unit of two sets of series connection, it specifically includes reation kettle I, vapour and liquid separator I, one-level absorption cauldron I, second grade absorption cauldron I, reation kettle II, vapour and liquid separator II, one-level absorption cauldron II and second grade absorption cauldron II, wherein reation kettle I, vapour and liquid separator I, one-level absorption cauldron I and second grade absorption cauldron I are one set of preceding reaction unit, vapour and liquid separator II, one-level absorption cauldron II and second grade absorption cauldron II are one set of reaction unit in the back. The two are connected in series through a discharge pipe I of the secondary absorption kettle, so that the phosgene in the reaction gas can be fully utilized besides two batches of raw materials can be processed at one time.
A condenser pipe I and a condenser I are arranged at the upper part of the reaction kettle I, and a return pipe I is arranged at the outlet of the condenser I; a stirrer I for stirring in the reaction kettle is arranged on the reaction kettle I, and a glass tube sight glass I is arranged on the return tube I.
The inlet of the gas-liquid separator I is connected with the outlet of the return pipe I, the upper part of the gas-liquid separator I is provided with a gas outlet connected with the inlet of the separation gas pipe I, the lower part of the gas-liquid separator I is provided with a liquid outlet connected with the inlet of the separation liquid pipe I, and the outlet of the separation liquid pipe I is communicated with the reaction kettle I; the separation liquid pipe I comprises a section of U-shaped pipe.
The first-stage absorption kettle I is used for absorbing phosgene in reaction gas through a solvent in the leading-in kettle, a gas inlet used for leading in the separation gas pipe I is formed in the upper portion of the first-stage absorption kettle I, a gas outlet and solvent inlet is further formed in the upper portion of the first-stage absorption kettle I, the gas outlet and solvent inlet is communicated with a first-stage absorption kettle gas outlet pipe I and a solvent inlet pipe I, a backflow port is formed in the lower portion of the first-stage absorption kettle I and connected with an inlet of an absorption kettle backflow pipe I, and an outlet of the absorption kettle backflow pipe I is communicated with the reaction kettle I.
The second-stage absorption kettle I is used for secondarily absorbing phosgene in reaction gas through a solvent in the kettle, the upper part of the second-stage absorption kettle I is provided with an air inlet for leading in an air inlet pipe I of the second-stage absorption kettle, the air inlet pipe I of the second-stage absorption kettle is communicated with an air outlet pipe I of the first-stage absorption kettle, and the bottom of the second-stage absorption kettle is provided with a liquid outlet connected with a discharge pipe of the second-stage absorption kettle; and the gas inlet pipe I of the secondary absorption kettle is communicated with the separation gas pipe I through a valve. The upper part of the second-stage absorption kettle I is provided with a gas outlet connected with a gas outlet pipe I of the second-stage absorption kettle, and the bottom of the second-stage absorption kettle I is provided with a liquid outlet connected with a discharge pipe I of the second-stage absorption kettle.
A condenser pipe II and a condenser II are arranged at the upper part of the reaction kettle II, a return pipe II is arranged at the outlet of the condenser II, and a feed port of the reaction kettle II is communicated with a discharge pipe I of the secondary absorption kettle; a stirrer II for stirring in the reaction kettle II is arranged on the reaction kettle II, and a glass tube sight glass II is arranged on the return tube II.
The inlet of the gas-liquid separator II is connected with the outlet of the return pipe II, the upper part of the gas-liquid separator II is provided with a gas outlet connected with the inlet of the separation gas pipe II, the lower part of the gas-liquid separator II is provided with a liquid outlet connected with the inlet of the separation liquid pipe II, and the outlet of the separation liquid pipe II is communicated with the reaction kettle II; the separation liquid pipe II comprises a section of U-shaped pipe.
The first-stage absorption kettle II is used for absorbing phosgene in reaction gas through a solvent introduced into the kettle, the upper part of the first-stage absorption kettle II is provided with a gas inlet used for introducing a separation gas pipe II, the upper part of the first-stage absorption kettle II is also provided with a gas outlet and solvent inlet, the gas outlet and solvent inlet is communicated with a gas outlet pipe II and a solvent inlet pipe II of the first-stage absorption kettle II, the lower part of the first-stage absorption kettle II is provided with a backflow port, the backflow port is connected with an inlet of a backflow pipe II of the absorption kettle, and an outlet of the backflow pipe II of the absorption kettle is communicated with the reaction kettle II;
the second-stage absorption kettle II is used for secondarily absorbing phosgene in reaction gas through a solvent in the kettle, the upper part of the second-stage absorption kettle II is provided with an air inlet used for leading in a second-stage absorption kettle air inlet pipe II, and the second-stage absorption kettle air inlet pipe II is communicated with the first-stage absorption kettle air outlet pipe II. And the gas inlet pipe II of the secondary absorption kettle is communicated with the separation gas pipe II through a valve. The upper part of the second-stage absorption kettle II is provided with a gas outlet connected with a gas outlet pipe II of the second-stage absorption kettle, and the bottom of the second-stage absorption kettle II is provided with a liquid outlet connected with a discharge pipe II of the second-stage absorption kettle.
When the device is operated, solid phosgene, reaction solvent and other reaction raw materials are added through a feed inlet of the reaction kettle I to carry out reaction. Stirring and condensing are started in the reaction process, after reaction gas passes through a condenser I and a gas-liquid separator I, liquid flows back to a reaction kettle I to continue to react, the gas is guided into a primary absorption kettle I through a separation gas pipe I to be absorbed, the absorbed liquid directly returns to the reaction kettle I to react, the gas absorbed by the primary absorption kettle I is further guided into a secondary absorption kettle I to be absorbed, the gas absorbed by the secondary absorption kettle I is guided into a subsequent waste gas treatment system, the liquid generated after the secondary absorption is guided into a reaction kettle II through a secondary absorption kettle discharge pipe I, solid phosgene can be added or not added into the reaction kettle II as required, a reaction solvent and other reaction raw materials are added into the reaction kettle II to react with the reaction kettle I simultaneously or subsequently. Similar before, stirring and condensation are started in the reaction process of the reaction kettle II, reaction gas passes through the condenser II and the gas-liquid separator II, liquid flows back to the reaction kettle II to continue to react, the gas is guided into the first-stage absorption kettle II by the separation gas pipe II to be absorbed, the absorbed liquid directly returns to the reaction kettle II to react, the gas absorbed by the first-stage absorption kettle II is further guided into the second-stage absorption kettle II to be absorbed, the gas absorbed by the second-stage absorption kettle is guided into a subsequent waste gas treatment system, the liquid generated after the second-stage absorption is reserved and can be carried out in the subsequent reaction, and the liquid can also return to the reaction kettle I or the reaction kettle II to continue to participate in the reaction.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (9)
1. A chemical reaction system using solid phosgene, characterized in that it comprises
The reaction kettle I is provided with a condensing pipe I and a condenser I at the upper part, and an outlet of the condenser I is provided with a return pipe I;
the inlet of the gas-liquid separator I is connected with the outlet of the return pipe I, the upper part of the gas-liquid separator I is provided with a gas outlet connected with the inlet of the separation gas pipe I, the lower part of the gas-liquid separator I is provided with a liquid outlet connected with the inlet of the separation liquid pipe I, and the outlet of the separation liquid pipe I is communicated with the reaction kettle I;
the first-stage absorption kettle I is used for absorbing phosgene in reaction gas through a solvent introduced into the kettle, a gas inlet used for introducing into the separation gas pipe I is formed in the upper part of the first-stage absorption kettle I, a gas outlet and solvent inlet is formed in the upper part of the first-stage absorption kettle I, the gas outlet and solvent inlet is communicated with a gas outlet pipe I and a solvent inlet pipe I of the first-stage absorption kettle I, a backflow port is formed in the lower part of the first-stage absorption kettle I, the backflow port is connected with an inlet of a backflow pipe I of the absorption kettle, and an outlet of the backflow pipe I of the absorption kettle is communicated with the reaction kettle I;
the second-stage absorption kettle I is used for secondarily absorbing phosgene in reaction gas through a solvent in the kettle, the upper part of the second-stage absorption kettle I is provided with a gas inlet for leading into a second-stage absorption kettle gas inlet pipe I, the second-stage absorption kettle gas inlet pipe I is communicated with a first-stage absorption kettle gas outlet pipe I, and the bottom of the second-stage absorption kettle is provided with a liquid outlet connected with a second-stage absorption kettle discharge pipe;
a condensation pipe II and a condenser II are arranged at the upper part of the reaction kettle II, a return pipe II is arranged at the outlet of the condenser II, and a feed port of the reaction kettle II is communicated with a discharge pipe I of the secondary absorption kettle;
the inlet of the gas-liquid separator II is connected with the outlet of the return pipe II, the upper part of the gas-liquid separator II is provided with a gas outlet connected with the inlet of the separation gas pipe II, the lower part of the gas-liquid separator II is provided with a liquid outlet connected with the inlet of the separation liquid pipe II, and the outlet of the separation liquid pipe II is communicated with the reaction kettle II;
the first-stage absorption kettle II is used for absorbing phosgene in reaction gas through a solvent introduced into the kettle, a gas inlet used for introducing the separation gas pipe II is formed in the upper part of the first-stage absorption kettle II, a gas outlet and solvent inlet is formed in the upper part of the first-stage absorption kettle II, the gas outlet and solvent inlet is communicated with a gas outlet pipe II and a solvent inlet pipe II of the first-stage absorption kettle II, a backflow port is formed in the lower part of the first-stage absorption kettle II, the backflow port is connected with an inlet of a backflow pipe II of the absorption kettle, and an outlet of the backflow pipe II of the absorption kettle is communicated with the reaction kettle II; and
and the second-stage absorption kettle II is used for secondarily absorbing phosgene in the reaction gas through a solvent in the kettle, an air inlet used for introducing the second-stage absorption kettle air inlet pipe II is formed in the upper part of the second-stage absorption kettle II, and the second-stage absorption kettle air inlet pipe II is communicated with the first-stage absorption kettle air outlet pipe II.
2. The chemical reaction system using solid phosgene as claimed in claim 1, wherein a stirrer I for stirring in the reaction vessel I is provided on the reaction vessel I, and a glass sight glass I is provided on the return pipe I.
3. The chemical reaction system using phosgene solid according to claim 1, characterized in that the separation liquid pipe I comprises a section of U-shaped pipe.
4. The chemical reaction system using solid phosgene according to claim 1, wherein the secondary absorption vessel inlet pipe I is connected to the separation gas pipe I through a valve.
5. The chemical reaction system using solid phosgene, as recited in claim 1, wherein a gas outlet connected to a gas outlet pipe I of the secondary absorption vessel is provided at the upper part of the secondary absorption vessel I, and a liquid outlet connected to a liquid outlet pipe I of the secondary absorption vessel is provided at the bottom of the secondary absorption vessel I.
6. The chemical reaction system using phosgene solid as claimed in claim 1, wherein a stirrer II for stirring the inside of the reaction vessel II is provided on the reaction vessel II, and a glass sight glass II is provided on the return pipe II.
7. The chemical reaction system using phosgene solid according to claim 1, characterized in that the separation liquid pipe II comprises a section of U-shaped pipe.
8. The chemical reaction system using solid phosgene of claim 1, characterized in that the secondary absorption vessel inlet pipe II is connected to the separation gas pipe II through a valve.
9. The chemical reaction system using solid phosgene as claimed in claim 1, wherein the secondary absorption vessel II has a gas outlet connected to the gas outlet tube II of the secondary absorption vessel at its upper part and a liquid outlet connected to the discharge tube II of the secondary absorption vessel at its bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023238673.0U CN214553491U (en) | 2020-12-29 | 2020-12-29 | Chemical reaction system using solid phosgene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023238673.0U CN214553491U (en) | 2020-12-29 | 2020-12-29 | Chemical reaction system using solid phosgene |
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| Publication Number | Publication Date |
|---|---|
| CN214553491U true CN214553491U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023238673.0U Active CN214553491U (en) | 2020-12-29 | 2020-12-29 | Chemical reaction system using solid phosgene |
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| Country | Link |
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| CN (1) | CN214553491U (en) |
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- 2020-12-29 CN CN202023238673.0U patent/CN214553491U/en active Active
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