CN214991235U - Energy-saving device for refining cyclohexanol and cyclohexanone in cyclohexanone production process - Google Patents
Energy-saving device for refining cyclohexanol and cyclohexanone in cyclohexanone production process Download PDFInfo
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- CN214991235U CN214991235U CN202121282799.XU CN202121282799U CN214991235U CN 214991235 U CN214991235 U CN 214991235U CN 202121282799 U CN202121282799 U CN 202121282799U CN 214991235 U CN214991235 U CN 214991235U
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Abstract
The utility model relates to a cyclohexanol and cyclohexanone refine economizer in cyclohexanone production process comprises take off light tower tail gas condenser, cyclohexanone refining tower mechanical vacuum pump, cyclohexanol refining tower tail gas condenser. The utility model adopts the mechanical vacuum pump to replace a steam jet pump or a combination of a liquid ring pump and the steam jet pump, does not consume steam, does not generate waste water, and can recover cyclohexanone, cyclohexanol and other organic materials in non-condensable gas; reduces the energy consumption and material consumption in the production process of the cyclohexanone device, reduces the sewage quantity, and has great significance in the aspects of energy conservation and environmental protection.
Description
Technical Field
The utility model belongs to the technical field of petrochemical, a cyclohexanol and cyclohexanone refine economizer in cyclohexanone production process is related to.
Background
Cyclohexanone is an important organic chemical raw material. In China, 65% of cyclohexanone is used as a raw material for producing caprolactam, 20% of cyclohexanone is used as a raw material for producing adipic acid, and the rest of cyclohexanone is used as a related chemical raw material. In addition, cyclohexanone is an excellent solvent and can be used as a solvent for nitrocellulose, vinyl chloride polymers and copolymers of paints. With the rapid development of chemical fiber industry in China, the yields of caprolactam and adipic acid are increased year by year, the demand of cyclohexanone is increased day by day, and the development and utilization prospect is wide.
In the cyclohexanone production device, because the conversion rate of producing cyclohexanone by cyclohexanol dehydrogenation is low, generally 45-55%, cyclohexanone in the reaction product needs to be separated from cyclohexanol and light components and heavy components of reaction by-products, because cyclohexanol and cyclohexanone have high boiling points and are not easy to separate, vacuum rectification is adopted in the prior art, a steam jet pump or a liquid ring pump and a steam jet pump are adopted in a vacuum system, and because a steam adding system is arranged, the steam consumption is high, the amount of generated sewage is large, and simultaneously, the sewage is sent to a sewage treatment plant and the materials in the sewage need to be recovered. The process flow has high steam consumption, high equipment investment cost and high material consumption, so that the research on the cyclohexanone refining process, the development of a new separation process, the reduction of the steam consumption, the equipment investment cost, the material consumption and the like have great significance.
The utility model discloses adopt mechanical type vacuum pump device to among cyclohexanone, cyclohexanol, light component and the heavy ends piece-rate system among the cyclohexanone apparatus for producing, effectively reduced energy consumption, material consumption and waste water treatment volume etc. in the cyclohexanone production process, all very meaningful in energy saving and consumption reduction, environmental protection and economy.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cyclohexanol and cyclohexanone refine economizer in cyclohexanone production process reduces energy consumption, material consumption and waste water treatment volume etc. reduces device running cost expense.
Technical scheme of the invention
An energy-saving device for refining cyclohexanol and cyclohexanone in the production process of cyclohexanone is composed of a condenser for tail gas from a light component removing tower, a mechanical vacuum pump for the light component removing tower, a condenser for tail gas from a cyclohexanone refining tower, a mechanical vacuum pump for the cyclohexanone refining tower, a condenser for tail gas from the cyclohexanol refining tower and a mechanical vacuum pump for the cyclohexanol refining tower.
One embodiment is as follows: a cyclohexanol and cyclohexanone refine the energy-saving device in cyclohexanone production process, take off the condenser of light tower tail gas, take off the vacuum pump of light tower mechanical type, the condenser of tail gas of cyclohexanone refining tower, the mechanical vacuum pump of cyclohexanone refining tower, the condenser of tail gas of cyclohexanol refining tower, the mechanical vacuum pump of cyclohexanol refining tower makes up;
a non-condensable gas pipeline from the light component removal tower system and a non-condensable gas pipeline of the light component removal second tower system are converged and then connected with a light component removal tower tail gas condenser, a condensate outlet of the light component removal tower tail gas condenser is connected with the light component removal tower system, a gas phase outlet of the light component removal tower tail gas condenser is connected with a light component removal tower mechanical vacuum pump, and a gas phase outlet of the light component removal tower mechanical vacuum pump is connected with a torch main pipe or a VOCS system and the like;
a non-condensable gas pipeline from the cyclohexanone refining tower system is connected with a cyclohexanone refining tower tail gas condenser, a condensate outlet of the cyclohexanone refining tower tail gas condenser is connected with the cyclohexanone refining tower system, a gas phase outlet of the cyclohexanone refining tower tail gas condenser is connected with a mechanical vacuum pump of the cyclohexanone refining tower, and the gas phase outlet of the mechanical vacuum pump of the cyclohexanone refining tower is connected with a torch main pipe or a VOCS system and the like;
the noncondensable gas pipeline from the cyclohexanol refining tower system is connected with a cyclohexanol refining tower tail gas condenser, a cyclohexanol refining tower tail gas condenser condensate outlet is connected with the cyclohexanol refining tower system, a gas phase outlet of the cyclohexanol refining tower tail gas condenser is connected with a mechanical vacuum pump of the cyclohexanol refining tower, and a gas phase outlet of the mechanical vacuum pump of the cyclohexanol refining tower is connected with a torch header pipe or a VOCS system.
The second embodiment: a cyclohexanol and cyclohexanone refine the energy-saving device in cyclohexanone production process, take off the condenser of light tower tail gas, take off the mechanical vacuum pump of light tower, the condenser of tail gas of cyclohexanone refining tower, the mechanical vacuum pump of cyclohexanone refining tower, the condenser of tail gas of cyclohexanol refining tower make up;
the non-condensable gas pipeline from the light component removal tower system and the non-condensable gas pipeline of the light component removal second tower system are converged and then connected with a light component removal tower tail gas condenser, the condensate of the light component removal tower tail gas condenser is connected with the light component removal tower system, the gas phase of the light component removal tower tail gas condenser is connected with a light component removal tower mechanical vacuum pump, and the light component removal tower mechanical vacuum pump is connected with a torch main pipe or a VOCS system;
the device comprises a cyclohexanone refining tower system, a condensate outlet of the cyclohexanone refining tower tail gas condenser, a cyclohexanone refining tower system, a cyclohexanol refining tower tail gas condenser, a mechanical vacuum pump of the cyclohexanone refining tower, and a flare header pipe or a VOCS system, wherein a non-condensable gas pipeline from the cyclohexanone refining tower system is connected with the tail gas condenser of the cyclohexanol refining tower, the condensate outlet of the tail gas condenser of the cyclohexanol refining tower is connected with the cyclohexanol refining tower system, a gas phase of the tail gas condenser of the cyclohexanone refining tower and a gas phase of the tail gas condenser of the cyclohexanol refining tower are converged and then connected with the mechanical vacuum pump of the cyclohexanone refining tower, and a gas phase outlet of the mechanical vacuum pump of the cyclohexanone refining tower is connected with the flare header pipe or the VOCS system.
In another embodiment: a cyclohexanol and cyclohexanone refine the energy-saving device in cyclohexanone production process, take off the condenser of light tower tail gas, cyclohexanone refining tower tail gas condenser, cyclohexanone refining tower mechanical vacuum pump, cyclohexanol refining tower tail gas condenser make up;
the noncondensable gas pipeline from the lightness-removing tower system and the noncondensable gas pipeline from the lightness-removing second tower system are converged and then connected with a tail gas condenser of the lightness-removing tower, a condensate outlet of the tail gas condenser of the lightness-removing tower is connected with the lightness-removing tower system, the noncondensable gas pipeline from the cyclohexanone refining tower system is connected with the tail gas condenser of the cyclohexanone refining tower, a condensate outlet of the tail gas condenser of the cyclohexanone refining tower is connected with a cyclohexanone refining tower system, the noncondensable gas pipeline from the cyclohexanol refining tower system is connected with the tail gas condenser of the cyclohexanol refining tower, and a condensate outlet of the tail gas condenser of the cyclohexanol refining tower is connected with a cyclohexanol refining tower system;
and the gas phase of the tail gas condenser of the light component removal tower, the gas phase of the tail gas condenser of the cyclohexanone refining tower and the gas phase of the tail gas condenser of the cyclohexanol refining tower are converged and then are connected with a mechanical vacuum pump, and the mechanical vacuum pump is connected with a torch main pipe or a VOCS system.
In the above embodiment:
the mechanical vacuum pump is a dry vacuum pump, a roots vacuum pump, a screw vacuum pump, and the dry vacuum pump is combined with the roots vacuum pump and the screw vacuum pump.
The mechanical vacuum pump is a multi-stage mechanical vacuum pump with 2 or more stages.
The mechanical vacuum pump is provided with a condenser at the back, a liquid phase outlet of the condenser is connected with a condensate reflux tank, and a non-condensable gas outlet is connected with an aftertreatment system.
An interstage condenser is arranged between the multistage mechanical vacuum pumps.
The connection of the condensate outlet of each tower tail gas condenser with each separation tower system refers to the connection of the reflux tanks of each separation tower system.
The characteristics and effects of the utility model
The utility model discloses adopt mechanical type vacuum pump device to among cyclohexanone, cyclohexanol, light component and the heavy ends piece-rate system among the cyclohexanone apparatus for producing, effectively reduced energy consumption, material consumption and waste water treatment volume etc. in the cyclohexanone production process, all very meaningful in energy saving and consumption reduction, environmental protection and economy.
Drawings
FIG. 1 shows a diagram of a cyclohexanol and cyclohexanone refining energy-saving device in a cyclohexanone production process with mechanical vacuum pumps arranged in each tower:
1-lightness-removing tower tail gas condenser, 2-cyclohexanone refining tower tail gas condenser, 3-cyclohexanol refining tower tail gas condenser, 4-lightness-removing tower mechanical vacuum pump, 5-cyclohexanone refining tower mechanical vacuum pump, 6-cyclohexanol refining tower mechanical vacuum pump
CW-circulating water RW-chilled water
FIG. 2 shows an energy-saving device for refining cyclohexanol and cyclohexanone in the process of producing cyclohexanone by arranging a mechanical vacuum pump on a cyclohexanone tower and a cyclohexanol tower
In the figure:
1-lightness-removing tower tail gas condenser, 2-cyclohexanone refining tower tail gas condenser, 3-cyclohexanol refining tower tail gas condenser, 4-lightness-removing tower mechanical vacuum pump, 5-cyclohexanone refining tower mechanical vacuum pump CW-circulating water RW-chilled water
FIG. 3, cyclohexanol and cyclohexanone refining energy-saving device in cyclohexanone production process with co-arranged mechanical vacuum pump
In the figure:
1-lightness removing tower tail gas condenser, 2-cyclohexanone refining tower tail gas condenser, 3-cyclohexanol refining tower tail gas condenser, 7-mechanical vacuum pump
CW-circulating water RW-chilled water
Detailed Description
The present invention will be further explained with reference to the accompanying drawings, which are not intended to limit the scope of the invention
Example 1:
a cyclohexanol and cyclohexanone refining energy-saving device of a device for producing 20 ten thousand tons of cyclohexanone annually, which is a process flow shown in figure 1.
The non-condensable gas pipeline from the light component removal tower system and the non-condensable gas pipeline of the light component removal two-tower system are converged and then connected with a light component removal tower tail gas condenser (1), condensate of the light component removal tower tail gas condenser (1) is connected with the light component removal tower system, the gas phase of the light component removal tower tail gas condenser (1) is connected with a light component removal tower mechanical vacuum pump (4), and the gas phase of the light component removal tower mechanical vacuum pump (4) is connected with a torch main pipe or a VOCS system and the like; a non-condensable gas pipeline from the cyclohexanone refining tower system is connected with a cyclohexanone refining tower tail gas condenser (2), condensate of the cyclohexanone refining tower tail gas condenser (2) is connected with the cyclohexanone refining tower system, the gas phase of the cyclohexanone refining tower tail gas condenser (2) is connected with a mechanical vacuum pump (5) of the cyclohexanone refining tower, and the gas phase of the mechanical vacuum pump (5) of the cyclohexanone refining tower is connected with a torch main pipe or a VOCS system and the like; the non-condensable gas pipeline from the cyclohexanol refining tower system is connected with a cyclohexanol refining tower tail gas condenser (3), the condensate of the cyclohexanol refining tower tail gas condenser (3) is connected with the cyclohexanol refining tower system, the gas phase of the cyclohexanol refining tower tail gas condenser (3) is connected with a mechanical vacuum pump (6) of the cyclohexanol refining tower, and the gas phase of the mechanical vacuum pump (6) of the cyclohexanol refining tower is connected with a torch header pipe or a VOCS system and the like.
The utility model discloses can reduce about 6 tons of low pressure steam per hour than the present device of cyclohexanone device, reduce about 6 tons per hour of waste water volume, can retrieve organic matters such as a small amount of cyclohexanone and cyclohexanol in the noncondensable gas.
Example 2:
a cyclohexanol and cyclohexanone refining energy-saving device of a device for producing 20 ten thousand tons of cyclohexanone annually, which is a process flow shown in figure 2.
The non-condensable gas pipeline from the light component removal tower system and the non-condensable gas pipeline of the light component removal two-tower system are converged and then connected with a light component removal tower tail gas condenser (1), condensate of the light component removal tower tail gas condenser (1) is connected with the light component removal tower system, the gas phase of the light component removal tower tail gas condenser (1) is connected with a light component removal tower mechanical vacuum pump (4), and the gas phase of the light component removal tower mechanical vacuum pump (4) is connected with a torch main pipe or a VOCS system and the like; the noncondensable gas pipeline from the cyclohexanone refining tower system is connected with a tail gas condenser (2) of the cyclohexanone refining tower, the condensate of the tail gas condenser (2) of the cyclohexanone refining tower is connected with a cyclohexanone refining tower system, the noncondensable gas pipeline from the cyclohexanol refining tower system is connected with a tail gas condenser (3) of the cyclohexanol refining tower, the condensate of the tail gas condenser (3) of the cyclohexanol refining tower is connected with the cyclohexanol refining tower system, the gas phase of the tail gas condenser (2) of the cyclohexanone refining tower and the gas phase of the tail gas condenser (3) of the cyclohexanol refining tower are converged and then connected with a mechanical vacuum pump (5) of the cyclohexanone refining tower, and the gas phase of the mechanical vacuum pump (5) of the cyclohexanone refining tower is connected with a torch main pipe or a VOCS system and the like.
The utility model discloses can reduce about 6 tons of low pressure steam per hour than the present device of cyclohexanone device, reduce about 6 tons per hour of waste water volume, can retrieve organic matters such as a small amount of cyclohexanone and cyclohexanol in the noncondensable gas.
Example 3:
a cyclohexanol and cyclohexanone refining energy-saving device of a device for producing 20 ten thousand tons of cyclohexanone annually, which is a process flow shown in figure 3.
The noncondensable gas pipeline from the lightness-removing tower system and the noncondensable gas pipeline of the lightness-removing second tower system are converged and then connected with a tail gas condenser (1) of the lightness-removing tower, the condensate of the tail gas condenser (1) of the lightness-removing tower is connected with the lightness-removing tower system, the noncondensable gas pipeline from the cyclohexanone refining tower system is connected with a tail gas condenser (2) of the cyclohexanone refining tower, the condensate of the tail gas condenser (2) of the cyclohexanone refining tower is connected with a cyclohexanone refining tower system, the noncondensable gas pipeline from the cyclohexanol refining tower system is connected with a tail gas condenser (3) of the cyclohexanol refining tower, the condensate of the tail gas condenser (3) of the cyclohexanol refining tower is connected with the cyclohexanol refining tower system, and the gas phase of the tail gas condenser (1) of the lightness-removing tower, the gas phase of the tail gas condenser (2) of the cyclohexanone refining tower and the gas phase of the tail gas condenser (3) of the cyclohexanol refining tower are converged and then are connected with a mechanical vacuum pump (7), and the gas phase of the mechanical vacuum pump (7) is connected with a torch main pipe or a VOCS system and the like.
The utility model discloses can reduce about 6 tons of low pressure steam per hour than the present device of cyclohexanone device, reduce about 6 tons per hour of waste water volume, can retrieve organic matters such as a small amount of cyclohexanone and cyclohexanol in the noncondensable gas.
Claims (8)
1. A cyclohexanol and cyclohexanone refine the energy-saving device in cyclohexanone production process, take off the condenser of light tower tail gas, take off the vacuum pump of light tower mechanical type, the condenser of tail gas of cyclohexanone refining tower, the mechanical vacuum pump of cyclohexanone refining tower, the condenser of tail gas of cyclohexanol refining tower, the mechanical vacuum pump of cyclohexanol refining tower makes up; the method is characterized in that:
a non-condensable gas pipeline from the light component removal tower system and a non-condensable gas pipeline of the light component removal second tower system are converged and then connected with a light component removal tower tail gas condenser, a condensate outlet of the light component removal tower tail gas condenser is connected with the light component removal tower system, a gas phase outlet of the light component removal tower tail gas condenser is connected with a light component removal tower mechanical vacuum pump, and a gas phase outlet of the light component removal tower mechanical vacuum pump is connected with a torch main pipe or a VOCS system;
a non-condensable gas pipeline from the cyclohexanone refining tower system is connected with a cyclohexanone refining tower tail gas condenser, a condensate outlet of the cyclohexanone refining tower tail gas condenser is connected with the cyclohexanone refining tower system, a gas phase outlet of the cyclohexanone refining tower tail gas condenser is connected with a mechanical vacuum pump of the cyclohexanone refining tower, and the gas phase outlet of the mechanical vacuum pump of the cyclohexanone refining tower is connected with a torch main pipe or a VOCS system;
the noncondensable gas pipeline from the cyclohexanol refining tower system is connected with a cyclohexanol refining tower tail gas condenser, a cyclohexanol refining tower tail gas condenser condensate outlet is connected with the cyclohexanol refining tower system, a gas phase outlet of the cyclohexanol refining tower tail gas condenser is connected with a mechanical vacuum pump of the cyclohexanol refining tower, and a gas phase outlet of the mechanical vacuum pump of the cyclohexanol refining tower is connected with a torch header pipe or a VOCS system.
2. A cyclohexanol and cyclohexanone refine the energy-saving device in cyclohexanone production process, take off the condenser of light tower tail gas, take off the mechanical vacuum pump of light tower, the condenser of tail gas of cyclohexanone refining tower, the mechanical vacuum pump of cyclohexanone refining tower, the condenser of tail gas of cyclohexanol refining tower make up; the method is characterized in that:
the non-condensable gas pipeline from the light component removal tower system and the non-condensable gas pipeline of the light component removal second tower system are converged and then connected with a light component removal tower tail gas condenser, the condensate of the light component removal tower tail gas condenser is connected with the light component removal tower system, the gas phase of the light component removal tower tail gas condenser is connected with a light component removal tower mechanical vacuum pump, and the light component removal tower mechanical vacuum pump is connected with a torch main pipe or a VOCS system;
the device comprises a cyclohexanone refining tower system, a condensate outlet of the cyclohexanone refining tower tail gas condenser, a cyclohexanone refining tower system, a cyclohexanol refining tower tail gas condenser, a mechanical vacuum pump of the cyclohexanone refining tower, and a flare header pipe or a VOCS system, wherein a non-condensable gas pipeline from the cyclohexanone refining tower system is connected with the tail gas condenser of the cyclohexanol refining tower, the condensate outlet of the tail gas condenser of the cyclohexanol refining tower is connected with the cyclohexanol refining tower system, a gas phase of the tail gas condenser of the cyclohexanone refining tower and a gas phase of the tail gas condenser of the cyclohexanol refining tower are converged and then connected with the mechanical vacuum pump of the cyclohexanone refining tower, and a gas phase outlet of the mechanical vacuum pump of the cyclohexanone refining tower is connected with the flare header pipe or the VOCS system.
3. A cyclohexanol and cyclohexanone refine the energy-saving device in cyclohexanone production process, take off the condenser of light tower tail gas, cyclohexanone refining tower tail gas condenser, cyclohexanone refining tower mechanical vacuum pump, cyclohexanol refining tower tail gas condenser make up; the method is characterized in that:
the noncondensable gas pipeline from the lightness-removing tower system and the noncondensable gas pipeline from the lightness-removing second tower system are converged and then connected with a tail gas condenser of the lightness-removing tower, a condensate outlet of the tail gas condenser of the lightness-removing tower is connected with the lightness-removing tower system, the noncondensable gas pipeline from the cyclohexanone refining tower system is connected with the tail gas condenser of the cyclohexanone refining tower, a condensate outlet of the tail gas condenser of the cyclohexanone refining tower is connected with a cyclohexanone refining tower system, the noncondensable gas pipeline from the cyclohexanol refining tower system is connected with the tail gas condenser of the cyclohexanol refining tower, and a condensate outlet of the tail gas condenser of the cyclohexanol refining tower is connected with a cyclohexanol refining tower system;
and the gas phase of the tail gas condenser of the light component removal tower, the gas phase of the tail gas condenser of the cyclohexanone refining tower and the gas phase of the tail gas condenser of the cyclohexanol refining tower are converged and then are connected with a mechanical vacuum pump, and a gas phase outlet of the mechanical vacuum pump is connected with a torch main pipe or a VOCS system.
4. The energy-saving device for refining cyclohexanol and cyclohexanone in the production process of cyclohexanone as claimed in any one of claims 1 to 3, wherein the mechanical vacuum pump is a dry vacuum pump, a roots vacuum pump, a screw vacuum pump, and the dry vacuum pump, the roots vacuum pump and the screw vacuum pump are combined with each other.
5. The energy-saving device for refining cyclohexanol and cyclohexanone in the cyclohexanone production process according to claim 4, characterized in that the mechanical vacuum pump is a multistage mechanical vacuum pump with 2 stages or more.
6. The energy-saving device for refining cyclohexanol and cyclohexanone in the cyclohexanone production process according to claim 4, characterized in that a condenser is arranged behind the mechanical vacuum pump, a liquid phase outlet of the condenser is connected with a condensate reflux tank, and a noncondensable gas outlet is connected with an aftertreatment system.
7. The energy-saving device for refining cyclohexanol and cyclohexanone in the cyclohexanone production process according to claim 4, characterized in that an interstage condenser is arranged between the multiple stages of mechanical vacuum pumps.
8. The energy-saving device for refining cyclohexanol and cyclohexanone in the cyclohexanone production process according to any one of claims 1 to 3, wherein the connection of the condensate outlet of each column tail gas condenser to each separation column system means the connection of the reflux tanks of each separation column system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121282799.XU CN214991235U (en) | 2021-06-09 | 2021-06-09 | Energy-saving device for refining cyclohexanol and cyclohexanone in cyclohexanone production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121282799.XU CN214991235U (en) | 2021-06-09 | 2021-06-09 | Energy-saving device for refining cyclohexanol and cyclohexanone in cyclohexanone production process |
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