CN216114770U - Ethylene oxide device technology refrigerating system - Google Patents
Ethylene oxide device technology refrigerating system Download PDFInfo
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- CN216114770U CN216114770U CN202122576909.XU CN202122576909U CN216114770U CN 216114770 U CN216114770 U CN 216114770U CN 202122576909 U CN202122576909 U CN 202122576909U CN 216114770 U CN216114770 U CN 216114770U
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Abstract
The utility model discloses an ethylene oxide device process refrigerating system which mainly comprises a steam type lithium bromide ice machine, a motor type lithium bromide ice machine, a flow regulating valve, a flowmeter, a thermometer, a filter and a plurality of valves; the frozen water feeding ends of the steam type lithium bromide ice machine and the motor type lithium bromide ice machine are both connected with a frozen water tank; the frozen water discharge end of the motor type lithium bromide ice machine is connected with the frozen water feed end of the steam type lithium bromide ice machine; the low-pressure clean steam pipeline and the process steam pipeline are converged to a steam main pipe, the steam main pipe is connected with the steam type lithium bromide ice machine, the chilled water of the steam type lithium bromide ice machine is output to downstream equipment, and the steam condensate of the steam type lithium bromide ice machine is output to the downstream equipment. The utility model can effectively recycle the process waste steam generated by the ethylene oxide device, and the generated process condensate can be used as the reflux of the dehydration tower, thereby saving energy and reducing emission; two lithium bromide ice machines are used in series, so that the equipment investment can be reduced; and simultaneously, the heat conversion efficiency is better.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to an ethylene oxide device process refrigerating system.
Background
The Ethylene Oxide (EO) has wide application and various derivatives, and can be used for producing various fine chemical products and can also be directly applied as the product. In recent years, a large number of ethylene oxide devices are built successively, and at present, the construction of the ethylene oxide devices is scaled and technically, but the large number of the built ethylene oxide devices brings productivity pressure to enterprises. Therefore, the ethylene oxide device needs to be developed for a long time and has competitiveness, and further adjustment of the production process of the device per se is needed, an energy utilization system is optimized, the energy consumption of the device is reduced, and the enterprise benefit is improved.
At present, most of ethylene glycol sections of an ethylene oxide device are used for purifying and refining products, and a large amount of water in an ethylene glycol aqueous solution needs to be removed, so that a large amount of steam needs to be consumed; however, at the same time, purification of the evaporated water generates a large amount of process steam; if the part of process steam can be recycled, the energy consumption of the device can be greatly reduced, and the enterprise benefit is increased. In the prior art, a lithium bromide ice machine is widely applied, and has a hot water type, a steam type, a hot water/steam dual-purpose type and the like, and the steam type lithium bromide ice machine can effectively recover process steam of the device by combining the actual situation of the device, so that on one hand, the emptying of the steam is avoided, the waste of energy and the environmental pollution are reduced, and on the other hand, the refrigerating capacity provided by the ice machine can be utilized to provide chilled water for the device to cool process materials.
The utility model application with the application number of 20202244909.3 discloses a recovery device for recovering ethylene glycol rectification low-grade steam, which comprises a main box, a base, a steam superheater and a condenser. The device upgrades low-grade steam to high-quality steam for storage, and simultaneously condenses and purifies untreated low-grade steam through a condenser and a purification box and then supplies the low-grade steam to a steam superheater for cooling.
Although the above patent recovers the low-grade steam of the device, the low-grade steam is only stored and not utilized, meanwhile, the device is relatively complex in design, the recovered steam and condensate are not fully applied to the production of the device, the actual requirement of the device cannot be met, and a large amount of cold energy cannot be provided for the device.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a process refrigerating system of an ethylene oxide device, which adopts process steam as power steam of a steam type lithium bromide ice machine, effectively recycles process waste steam generated by the ethylene oxide device, and generates process condensate which can be used as a dehydration tower to reflux, thereby reducing waste water discharge and effectively reducing device energy consumption; meanwhile, the motor type lithium bromide ice machine and the steam type lithium bromide ice machine are used in series, so that the original equipment can be fully utilized, and the equipment investment is reduced; and meanwhile, the heat conversion efficiency can be better.
The technical scheme adopted by the utility model for solving the technical problem is as follows: a technical refrigeration system of an ethylene oxide device mainly comprises a steam type lithium bromide ice machine, a motor type lithium bromide ice machine, a flow regulating valve, a flowmeter, a thermometer, a filter and a plurality of valves; the chilled water feeding end of the steam type lithium bromide ice machine is connected with the chilled water tank through a chilled water feeding pipeline, and the chilled water feeding end of the motor type lithium bromide ice machine is connected with the chilled water tank through a chilled water feeding pipeline; the frozen water discharge end of the motor type lithium bromide ice machine is connected with the frozen water feed end of the steam type lithium bromide ice machine through a pipeline; the low-pressure clean steam pipeline and the process steam pipeline are converged to a steam main pipe, the steam main pipe is connected with the steam type lithium bromide ice machine, a chilled water outlet pipeline of the steam type lithium bromide ice machine is connected with downstream heat exchange equipment, and steam condensate of the steam type lithium bromide ice machine is connected with the downstream equipment through a process condensate pipeline.
Furthermore, a butterfly valve a and a check valve a are arranged on the low-pressure cleaning steam pipeline; and a butterfly valve b and a check valve b are arranged on the process steam pipeline.
Furthermore, a filter a and a flow regulating valve are arranged on the steam main pipe, the filter a is located at the front end of the flow regulating valve and used for filtering impurities in process steam and preventing the flow regulating valve and the steam type lithium bromide ice machine from being damaged.
Further, the chilled water inlet pipeline is connected to the motor type lithium bromide ice machine through a chilled water inlet pipeline of the motor type lithium bromide ice machine; the frozen water inlet pipeline of the motor type lithium bromide ice machine is provided with a flowmeter, a butterfly valve e and a filter c, and is used for displaying the flow rate of frozen water, filtering impurities in the frozen water and preventing the impurities from entering the ice machine; and a butterfly valve f is arranged on a chilled water outlet pipeline of the motor type lithium bromide ice machine.
Furthermore, a bypass valve a is arranged between a chilled water inlet pipeline and a chilled water outlet pipeline of the motor type lithium bromide ice machine, and is positioned on the chilled water inlet pipeline and used for controlling the flow of chilled water entering the motor type lithium bromide ice machine; the chilled water inlet pipeline and the chilled water outlet pipeline of the motor type lithium bromide ice machine are converged to a chilled water converging pipeline.
Furthermore, a thermometer, a butterfly valve d and a filter b are arranged on the chilled water converging pipeline; and a butterfly valve c is arranged on a chilled water outlet pipeline of the steam type lithium bromide ice machine. The thermometer is used for detecting the temperature of the chilled water at the chilled water converging pipeline; the filter b is used for filtering impurities in the frozen water and preventing the impurities from entering the ice maker.
Furthermore, the circulating water feeding ends of the steam type lithium bromide ice machine and the motor type lithium bromide ice machine are connected with a circulating water inlet pipeline; and circulating water discharge ends of the steam type lithium bromide ice machine and the motor type lithium bromide ice machine are connected with a circulating water outlet pipeline.
Further, the motor type lithium bromide ice machine is connected with the circulating water inlet pipeline through a circulating water inlet pipeline of the motor type lithium bromide ice machine, and a butterfly valve i and a filter e are arranged on the circulating water inlet pipeline of the motor type lithium bromide ice machine; the motor type lithium bromide ice machine is connected with the circulating water outlet pipeline through a circulating water outlet pipeline of the motor type lithium bromide ice machine, and a butterfly valve j is arranged on the circulating water outlet pipeline of the motor type lithium bromide ice machine; and a bypass valve c is arranged between the circulating water inlet pipeline of the motor type lithium bromide ice machine and the circulating water outlet pipeline of the motor type lithium bromide ice machine.
Further, the steam type lithium bromide ice machine is connected with the circulating water inlet pipeline through a circulating water inlet pipeline of the steam type lithium bromide ice machine, and a butterfly valve g and a filter d are arranged on the circulating water inlet pipeline of the steam type lithium bromide ice machine; a butterfly valve h is arranged on the circulating water outlet pipeline; and a bypass valve b is arranged between the circulating water inlet pipeline of the steam type lithium bromide ice machine and the circulating water outlet pipeline.
Further, the low-pressure cleaning steam pipeline adopts 0.2 MPaG low-pressure cleaning steam; the process steam line uses 0.1 MPaG process steam.
The utility model has the beneficial effects that: compared with the prior art, the technical refrigeration system of the ethylene oxide device provided by the utility model adopts the lithium bromide ice machine, effectively recycles the technical steam generated by the ethylene oxide device, provides cold energy for cooling the chilled water of the device, avoids energy waste, reduces environmental pollution, averagely saves one hundred more tons of steam per hour, and can save thousands of yuan for enterprises; meanwhile, the condensed steam condensate can be recycled and used for reflux of downstream equipment. Meanwhile, the mode that the steam type lithium bromide ice machine and the electric type lithium bromide ice machine are connected in series is adopted, the original equipment is effectively utilized, and the equipment investment is reduced. In the lithium bromide ice machine, lithium bromide is used as an absorbent, water is used as a refrigerant, and the lithium bromide absorbs the refrigerant water and emits absorption heat. On one hand, the circulating water absorbs the heat of absorption of the lithium bromide and the water to improve the absorption force of the lithium bromide, and on the other hand, in the circulation conversion process of the lithium bromide solution, the circulating water absorbs the heat of condensation of the evaporated refrigerant steam to be converted into refrigerant water and absorbs the heat of the chilled water, so that refrigeration is performed.
Drawings
In order that the embodiments of the utility model may be more readily understood, reference should now be made to the following detailed description taken in conjunction with the accompanying drawings. It should be noted that, in accordance with industry standard practice, various components are not necessarily drawn to scale and are provided for illustrative purposes only. In fact, the dimensions of the various elements may be arbitrarily expanded or reduced for clarity of discussion.
Fig. 1 is a schematic structural diagram of a process refrigeration system provided by the present invention.
Wherein, 1-low pressure cleaning steam pipeline; 2-a butterfly valve a; 3-check valve a; 4-process steam line; 5-butterfly valve b; 6-check valve b; 7-filter a; 8-a flow regulating valve; 9-a steam main; 10-steam type lithium bromide ice machine; 11-butterfly valve c; 12-a chilled water outlet pipeline of the steam type lithium bromide ice machine; 13-chilled water inlet pipeline; 14-bypass valve a; 15-a thermometer; 16-butterfly valve d; 17-filter b; 18-chilled water inlet pipeline of the motor type lithium bromide ice machine; 19-a flow meter; 20-butterfly valve e; 21-filter c; 22-motor type lithium bromide ice machine; 23-butterfly valve f; 24-chilled water outlet pipeline of the motor type lithium bromide ice machine; 25-process condensate line; 26-a circulating water inlet pipeline; 27-circulating water inlet pipeline of steam type lithium bromide ice machine; 28-bypass valve b; 29-butterfly valve g; 30-filter d; 31-butterfly valve h; 32-circulating water outlet pipeline; 33-circulating water inlet pipeline of the motor type lithium bromide ice machine; 34-bypass valve c; 35-a butterfly valve i; 36-filter e; 37-butterfly valve j; 38-circulating water outlet pipeline of the motor type lithium bromide ice machine; 39-chilled water converging pipeline.
Detailed Description
The utility model is further illustrated by the following specific examples. These examples are intended to illustrate the utility model and are not intended to limit the scope of the utility model.
Examples
An ethylene oxide device process refrigeration system, in particular to the technical field of process refrigeration. The process refrigerating system mainly comprises a flow regulating valve 8, a steam type lithium bromide ice machine 10, a motor type lithium bromide ice machine 22, a flow meter 19, a thermometer 15, a filter and a plurality of valves. The refrigerated water inlet end of the steam type lithium bromide ice machine 10 is connected with the refrigerated water tank through a refrigerated water inlet pipeline 13, the refrigerated water inlet end of the motor type lithium bromide ice machine 22 is connected with the refrigerated water tank through the refrigerated water inlet pipeline 13, the refrigerated water outlet end of the motor type lithium bromide ice machine 22 is connected with the refrigerated water inlet end of the steam type lithium bromide ice machine 10, the low-pressure clean steam pipeline 1 and the process steam pipeline 4 are converged to a steam header pipe 9 and connected with the steam type lithium bromide ice machine 10, the refrigerated water outlet pipeline 12 of the steam type lithium bromide ice machine is connected with downstream heat exchange equipment, and steam condensate of the steam type lithium bromide ice machine 10 is connected with downstream equipment through a process condensate pipeline 25.
The low-pressure cleaning steam pipeline 1 is provided with a butterfly valve a2 and a check valve a 3; the process steam pipeline 4 is provided with a butterfly valve b5 and a check valve b 6. The steam main pipe 9 is provided with a filter a7 and a flow regulating valve 8, and the filter a7 is positioned in front of the flow regulating valve 8 and used for filtering impurities in process steam and preventing the flow regulating valve 8 and the steam type lithium bromide ice machine 10 from being damaged.
A flow meter 19, a butterfly valve e20 and a filter c21 are arranged on a chilled water inlet pipeline 18 of the motor type lithium bromide ice machine and are used for displaying the flow rate of chilled water and filtering impurities in the chilled water to prevent the impurities from entering the ice machine; a butterfly valve f23 is arranged on the chilled water outlet pipeline 24 of the motor type lithium bromide ice machine. A bypass valve a14 is arranged between the chilled water inlet pipeline 18 and the chilled water outlet pipeline 24 of the motor type lithium bromide ice machine and is used for controlling the flow of the chilled water entering the motor type lithium bromide ice machine 22; the chilled water converging line 39 is provided with a thermometer 15 for detecting the temperature of the chilled water at the chilled water converging line 39. A butterfly valve d16 and a filter b17 are arranged on a pipeline between the chilled water converging pipeline 39 and the chilled water feeding end of the steam type lithium bromide ice machine 10 and are used for filtering impurities in the chilled water and preventing the impurities from entering the ice machine; the outlet pipeline 12 of the chilled water of the steam type lithium bromide ice machine is provided with a butterfly valve c 11.
A circulating water inlet line 26 is connected to the steam type lithium bromide ice machine 10 and the motor type lithium bromide ice machine 22, respectively. A butterfly valve i35 and a filter e36 are arranged on a circulating water inlet pipeline 33 of the motor type lithium bromide ice machine; a butterfly valve j37 is arranged on the circulating water outlet pipeline 38 of the motor type lithium bromide ice machine; a bypass valve c34 is arranged between the circulating water inlet pipeline 33 of the motor type lithium bromide ice machine and the circulating water outlet pipeline 38 of the motor type lithium bromide ice machine. A butterfly valve g29 and a filter d30 are arranged on the circulating water inlet pipeline 27 of the steam type lithium bromide ice machine; a butterfly valve h31 is arranged on the circulating water outlet pipeline 32; a bypass valve b28 is arranged between the circulating water inlet pipeline 27 and the circulating water outlet pipeline 32 of the steam type lithium bromide ice machine.
The low-pressure cleaning steam pipeline 1 adopts 0.2 MPaG low-pressure cleaning steam; the process steam line 4 uses 0.1 MPaG process steam.
The working mode of the technical refrigeration system of the ethylene oxide device is as follows: part of the chilled water with the temperature of 15 +/-1 ℃ from the chilled water tank enters the motor type lithium bromide ice machine 22 through a chilled water inlet pipeline 18 of the motor type lithium bromide ice machine, part of the chilled water is converged with the chilled water of a chilled water outlet pipeline 24 of the motor type lithium bromide ice machine through a bypass valve a14, enters a chilled water converging pipeline 39 and then enters the steam type lithium bromide ice machine 10, the flow rate of the chilled water entering the motor type lithium bromide ice machine 22 is detected through a flow meter 19 of the chilled water inlet pipeline 18 of the motor type lithium bromide ice machine, the flow rate of the chilled water entering the motor type lithium bromide ice machine 22 is adjusted through a bypass valve a14, and the temperature of the converged chilled water is detected to be 13.5 +/-1 ℃ through a thermometer 15 of the chilled water converging pipeline 39. The merged chilled water is cooled by a steam type lithium bromide ice machine 10 and then enters a chilled water outlet pipeline 12 of the steam type lithium bromide ice machine, the temperature is 10 +/-1 ℃, and then the chilled water is conveyed to downstream heat exchange equipment. A part of the circulating water with the temperature of 32 +/-2 ℃ in the circulating water inlet pipeline 26 enters the motor type lithium bromide machine 22 through the circulating water inlet pipeline 33 of the motor type lithium bromide machine, cools a heat exchanger in the motor type lithium bromide machine 22 and then enters the circulating water outlet pipeline 38 of the motor type lithium bromide machine, and at the moment, the bypass valve c34 of the circulating water of the motor type lithium bromide machine 22 is in a closed state. Another part of the circulating water with the temperature of 32 +/-2 ℃ in the circulating water inlet pipeline 26 enters the steam type lithium bromide ice machine 10 through the circulating water inlet pipeline 27 of the steam type lithium bromide ice machine, cools the heat exchanger in the steam type lithium bromide ice machine 10 and then enters the circulating water outlet pipeline 32, and at the moment, the bypass valve b28 of the circulating water of the steam type lithium bromide ice machine 10 is in a closed state. Circulating water of the circulating water outlet pipeline 38 of the motor type lithium bromide ice machine and circulating water of the circulating water outlet pipeline of the steam type lithium bromide ice machine are converged and enter the circulating water outlet pipeline 32, and the temperature of the circulating water is 42 +/-2 ℃. Steam is introduced into the steam type lithium bromide ice machine 10 through the steam main pipe 9, when the device is started for the first time, as the device does not generate process steam, low-pressure clean steam of 0.2 MPaG is adopted, and process steam of 0.1 MPaG is adopted during normal production, the steam is introduced into the steam type lithium bromide ice machine 10 through the steam pipeline 4 of the 0.1 MPaG process, the steam flow regulating valve 8 is opened slowly, and the steam flow entering the steam type lithium bromide ice machine 10 is controlled through the flow regulating valve 8. The condensate of the steam after heat exchange and condensation enters a process condensate pipeline 25 and is conveyed to downstream equipment to be used as reflux of the downstream equipment.
The process steam is used as the power steam of the steam type lithium bromide ice machine 10, the process waste steam generated by the ethylene oxide device is effectively recycled, and the generated process condensate is conveyed to the dehydration tower through the process condensate pipeline 25 to be used as the reflux of the dehydration tower, so that the wastewater discharge is reduced, and the energy consumption of the device is effectively reduced; meanwhile, the motor type lithium bromide ice machine 10 and the steam type lithium bromide ice machine 22 are used in series, so that original equipment can be fully utilized, equipment investment is reduced, and heat utilization efficiency is improved.
The above embodiments are only for illustrating the utility model and are not to be construed as limiting the utility model, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, therefore, all equivalent technical solutions also belong to the scope of the utility model, and the scope of the utility model is defined by the claims.
Claims (10)
1. An ethylene oxide device technology refrigerating system is characterized in that: the process refrigeration system mainly comprises a steam type lithium bromide ice machine, a motor type lithium bromide ice machine, a flow regulating valve, a flow meter, a thermometer, a filter and a plurality of valves; the chilled water feeding end of the steam type lithium bromide ice machine is connected with the chilled water tank through a chilled water feeding pipeline, and the chilled water feeding end of the motor type lithium bromide ice machine is connected with the chilled water tank through a chilled water feeding pipeline; the frozen water discharge end of the motor type lithium bromide ice machine is connected with the frozen water feed end of the steam type lithium bromide ice machine through a pipeline; the low-pressure cleaning steam pipeline and the process steam pipeline are converged to a steam main pipe, the steam main pipe is connected with the steam type lithium bromide ice machine, a chilled water outlet pipeline of the steam type lithium bromide ice machine is connected with downstream heat exchange equipment, and steam condensate of the steam type lithium bromide ice machine is connected with the downstream equipment through a process condensate pipeline.
2. The ethylene oxide plant process refrigeration system of claim 1, wherein: a butterfly valve a and a check valve a are arranged on the low-pressure clean steam pipeline; and a butterfly valve b and a check valve b are arranged on the process steam pipeline.
3. The ethylene oxide plant process refrigeration system of claim 1, wherein: and the steam main pipe is provided with a filter a and a flow regulating valve, and the filter a is positioned at the front end of the flow regulating valve.
4. The ethylene oxide plant process refrigeration system of claim 1, wherein: the chilled water inlet pipeline is connected to the motor type lithium bromide ice machine through a chilled water inlet pipeline of the motor type lithium bromide ice machine; a flow meter, a butterfly valve e and a filter c are arranged on a chilled water inlet pipeline of the motor type lithium bromide ice machine; and a butterfly valve f is arranged on a chilled water outlet pipeline of the motor type lithium bromide ice machine.
5. The ethylene oxide plant process refrigeration system of claim 4, wherein: a bypass valve a is arranged between the chilled water inlet pipeline of the motor type lithium bromide ice machine and the chilled water outlet pipeline of the motor type lithium bromide ice machine, and is positioned on the chilled water inlet pipeline; the chilled water inlet pipeline and the chilled water outlet pipeline of the motor type lithium bromide ice machine are converged to a chilled water converging pipeline.
6. The ethylene oxide plant process refrigeration system of claim 5, wherein: a thermometer, a butterfly valve d and a filter b are arranged on the chilled water converging pipeline; and a butterfly valve c is arranged on a chilled water outlet pipeline of the steam type lithium bromide ice machine.
7. The ethylene oxide plant process refrigeration system of claim 1, wherein: circulating water feeding ends of the steam type lithium bromide ice machine and the motor type lithium bromide ice machine are connected with a circulating water inlet pipeline; and circulating water discharge ends of the steam type lithium bromide ice machine and the motor type lithium bromide ice machine are connected with a circulating water outlet pipeline.
8. The ethylene oxide plant process refrigeration system of claim 7, wherein: the motor type lithium bromide ice machine is connected with the circulating water inlet pipeline through a circulating water inlet pipeline of the motor type lithium bromide ice machine, and a butterfly valve i and a filter e are arranged on the circulating water inlet pipeline of the motor type lithium bromide ice machine; the motor type lithium bromide ice machine is connected with the circulating water outlet pipeline through a circulating water outlet pipeline of the motor type lithium bromide ice machine, and a butterfly valve j is arranged on the circulating water outlet pipeline of the motor type lithium bromide ice machine; and a bypass valve c is arranged between the circulating water inlet pipeline of the motor type lithium bromide ice machine and the circulating water outlet pipeline of the motor type lithium bromide ice machine.
9. The ethylene oxide plant process refrigeration system of claim 7, wherein: the steam type lithium bromide ice machine is connected with the circulating water inlet pipeline through a circulating water inlet pipeline of the steam type lithium bromide ice machine, and a butterfly valve g and a filter d are arranged on the circulating water inlet pipeline of the steam type lithium bromide ice machine; a butterfly valve h is arranged on the circulating water outlet pipeline; and a bypass valve b is arranged between the circulating water inlet pipeline of the steam type lithium bromide ice machine and the circulating water outlet pipeline.
10. The ethylene oxide plant process refrigeration system of claim 1, wherein: the low-pressure cleaning steam pipeline adopts 0.2 MPaG low-pressure cleaning steam; the process steam line uses 0.1 MPaG process steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122576909.XU CN216114770U (en) | 2021-10-26 | 2021-10-26 | Ethylene oxide device technology refrigerating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122576909.XU CN216114770U (en) | 2021-10-26 | 2021-10-26 | Ethylene oxide device technology refrigerating system |
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| CN216114770U true CN216114770U (en) | 2022-03-22 |
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| CN202122576909.XU Active CN216114770U (en) | 2021-10-26 | 2021-10-26 | Ethylene oxide device technology refrigerating system |
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