CN114087045A - Energy utilization system for steam of ethylene oxide glycol device and use method thereof - Google Patents
Energy utilization system for steam of ethylene oxide glycol device and use method thereof Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/003—Arrangements for measuring or testing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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Abstract
The invention discloses an energy utilization system for steam of an ethylene oxide glycol device and a using method thereof, belonging to the technical field of chemical production, and comprising a steam pipe network, a steam turbine a, a steam turbine b, a steam turbine c, a large steam drum, a small steam drum, a flash tank and a deaerator, wherein the steam pipe network comprises 6 pressure grades, namely 4.0MPaG steam pipe network, 2.5MPaG steam pipe network, 1.4MPaG steam pipe network, 0.6MPaG steam pipe network, 0.5MPaG steam pipe network and 0.2MPaG steam pipe network; the technical problem of energy loss in chemical production is solved, the power consumption of the device is greatly reduced, the energy loss caused by directly reducing high-grade steam to low-grade steam is avoided, the energy consumption of the device is reduced, the enterprise benefit is improved, and the method is mainly applied to the production of ethylene oxide glycol devices.
Description
Technical Field
The invention belongs to the technical field of chemical production, and particularly relates to an energy utilization system for steam of an ethylene oxide glycol device and a using method thereof.
Background
Ethylene oxide has wide application, active chemical reaction and various downstream derivatives, can be directly used as chemical raw materials on one hand, and can be used as an intermediate to react with other compounds to produce fine chemicals such as ethylene glycol, ethanolamine, surfactant and the like on the other hand; meanwhile, with the implementation of national policies, the demand of downstream products of the ethylene oxide, namely the water reducing agent, is increased, so that the production capacity of the ethylene oxide is rapidly expanded. Among them, ethylene glycol is the largest downstream product of ethylene oxide, and accounts for about 70%, but with the rise of large petrochemical plants in recent years, the ethylene glycol production capacity is already excessive, the price of ethylene glycol continuously fluctuates, and the ethylene oxide/ethylene glycol plant faces huge pressure.
At present, ethylene glycol has a continuously low profit margin, but ethylene oxide still has a large profit margin, so that the development of an ethylene oxide device in a large-scale direction is stimulated; most ethylene oxide plants are matched with downstream ethylene glycol plants, but due to the fact that the price of ethylene glycol is continuously low in recent years, many enterprises remove the downstream ethylene glycol plants to directly produce ethylene oxide while further excavating and deepening the breadth and depth of the downstream application field of ethylene oxide.
The ethylene oxide device is matched with a downstream ethylene glycol production device to produce ethylene glycol, so that the ethylene glycol production device has the advantages of improving the flexibility of products and reducing the risks of enterprises to a certain extent; on the other hand, from the production, the ethylene glycol workshop section is mostly the purification and the refining of ethylene glycol, evaporate a large amount of water, consequently can produce a large amount of low-grade process steam, and ethylene oxide reaction workshop section then needs a large amount of low-grade steam to concentrate and purify, if do not have the ethylene glycol device, this part steam can only be provided by whole factory steam pipe network, slightly less to newly-built device influence, can design according to actual conditions, but to rebuilding the device, the influence is great, mostly need use high-grade steam to reduce the temperature and reduce the pressure and carry out, just so cause energy loss and energy consumption great.
At present, for an ethylene oxide production process, the main energy consumption is steam, and the proportion is about 70%; therefore, reducing the steam energy consumption of an ethylene oxide device is always the aim of the enterprise to strive for and improve, how to utilize the steam well is always the subject of the ethylene oxide device to be explored by comprehensively utilizing the steam; according to the actual situation of the device, the invention provides a feasible and effective comprehensive utilization mode of the steam, reduces the steam energy consumption, and utilizes the steam well, thereby achieving the effect of energy conservation.
Disclosure of Invention
In order to solve the technical problems, the design provides an energy utilization system for steam of an ethylene oxide glycol device and a using method thereof, and the adopted technical scheme is as follows:
an energy utilization system for steam of an ethylene oxide glycol (EO) device comprises a steam pipe network, a steam turbine a, a steam turbine b, a steam turbine c, a large steam drum, a small steam drum, a flash tank and a deaerator, wherein the steam turbine a1, the steam turbine b, the steam turbine c and the steam pipe network are core components of the system, and the steam pipe network comprises 6 pressure grades which are respectively a 4.0MPaG steam pipe network, a 2.5MPaG steam pipe network, a 1.4MPaG steam pipe network, a 0.6MPaG steam pipe network, a 0.5MPaG steam pipe network and a 0.2MPaG steam pipe network; the 4.0MPaG steam pipe network is connected with a steam turbine a, and the steam turbine a extracts 0.5MPaG steam and sends the extracted steam to the 0.5MPaG steam pipe network; the 4.0MPaG steam pipe network directly provides steam for the 2.5MPaG steam pipe network through the temperature and pressure reducing device a, the 2.5MPaG steam pipe network is connected with the steam turbine b, and the steam turbine b5 extracts 0.5MPaG steam and sends the extracted steam to the 0.5MPaG steam pipe network; the 2.5MPaG steam pipe network directly provides steam for the 1.4MPaG steam pipe network through a temperature and pressure reducing device b 8; the 1.4MPaG steam pipe network is connected with a steam turbine c14, and the steam turbine c pumps out 0.2MPaG steam and sends the 0.2MPaG steam pipe network; the 1.4MPaG steam pipe network provides steam for the 0.6MPaG steam pipe network through a temperature and pressure reducing device c; the 0.5MPaG steam pipe network is connected with the 0.2MPaG steam pipe network through a temperature and pressure reducing device e, and the pressure is reduced through the 0.5MPaG steam pipe network to provide steam for the 0.2MPaG steam pipe network; the 1.4MPaG steam pipe network provides steam through a temperature and pressure reducer d and a 0.5MPaG steam pipe network.
Preferably: the steam turbine a1, the steam turbine b5 and the steam turbine c14 are all back pressure type turbines with better effect.
Preferably: the 4.0MPaG steam is superheated steam and the temperature is 400 ℃; the steam of 2.5MPaG, 1.4MPaG, 0.6MPaG, 0.5MPaG and 0.2MPaG is saturated steam at this pressure.
Preferably: the steam turbine is characterized in that bypasses are arranged between the steam inlet pipeline and the steam extraction pipeline of the steam turbine a, the steam turbine b and the steam turbine c, the bypasses are respectively provided with a temperature and pressure reducer f, a temperature and pressure reducer g and a temperature and pressure reducer i, and the temperature and pressure reducers are used for discharging steam when the steam turbine is in emergency shutdown.
Preferably: a separator a is arranged in front of a steam inlet pipeline of the steam turbine b and used for separating moisture in the steam, and a separator b is arranged in front of a steam inlet pipeline of the steam turbine c and used for separating the moisture in the steam.
Preferably: boiler feed water of any temperature and pressure reducer is provided by a deaerator through a boiler feed water pump.
Preferably: the 2.5MPaG steam produced by the large steam drum is provided for a 2.5MPaG steam pipe network; the 1.4MPaG steam produced by the small steam drum is provided for a 1.4MPaG steam pipe network; the flash tank produces 0.2MPaG steam and provides the 0.2MPaG steam pipe network.
Preferably: the produced lime set of 1.4MPaG steam consumer, 0.6MPaG steam consumer and 0.5MPaG steam consumer gets into the flash tank, carries out recycle, the produced lime set of 0.2MPaG steam consumer gets into the oxygen-eliminating device 18, lime set in the flash tank gets into the oxygen-eliminating device and for the oxygen-eliminating device supplementary liquid level, and unnecessary lime set is sent to the outer desalination water station of boundary area.
Preferably: the 0.5MPaG steam pipe network is connected with the deaerator and provides a heat source for the deaerator, and a temperature and pressure reducer h is arranged at an outlet of the steam extraction pipeline of the steam turbine a.
The invention has the following advantages:
compared with the prior art, the energy utilization system for the steam of the ethylene oxide glycol device and the use method thereof provided by the invention utilize the steam and generate electricity through the steam turbine, so that on one hand, low-grade steam can be provided for the ethylene oxide device through steam extraction of the steam turbine, and the production requirements of the device are met; on the other hand, the steam turbine is used for generating electricity, so that the electricity consumption of the device is greatly reduced, thousands of yuan of electricity consumption is saved for enterprises every year, meanwhile, the energy loss caused by directly reducing high-grade steam to low-grade steam is avoided, the energy consumption of the device is reduced, the enterprise benefit is improved, the steam turbine is suitable for comprehensive popularization and application, the requirements of national conditions of China are better met, and the effect of saving energy is realized.
Drawings
FIG. 1 is an engineering schematic diagram of an energy system for ethylene oxide glycol device steam and a using method thereof.
In the figure, 1-turbine a; 2-temperature and pressure reduction device a; 3-pressure gauge a; 4-separator a; 5-a steam turbine b; 6-big steam drum; 7-pressure gauge b; 8-temperature and pressure reduction device b; 9-small steam pocket; 10-pressure gauge c; 11-pressure gauge d; 12-a temperature and pressure reducer c; 13-separator b; 14-a steam turbine c; 15-temperature and pressure reduction device d; 16-pressure gauge e; 17-temperature and pressure reducer e; 18-a deaerator; 19-a flash tank; 20-boiler feed pump; 21-temperature and pressure reducer f; 22-temperature and pressure reduction device g; 23-temperature and pressure reduction device h; 24-temperature and pressure reduction device i.
Detailed Description
Example 1
As shown in fig. 1:
the utility model provides an ethylene oxide glycol device steam is with ability system and application method thereof, includes steam pipe network, steam turbine a1, steam turbine b5, steam turbine c14, big steam pocket 6, little steam pocket 9, flash drum 19 and oxygen-eliminating device 18, its characterized in that: the steam pipe network comprises 6 pressure grades, namely a 4.0MPaG steam pipe network, a 2.5MPaG steam pipe network, a 1.4MPaG steam pipe network, a 0.6MPaG steam pipe network, a 0.5MPaG steam pipe network and a 0.2MPaG steam pipe network; the 4.0MPaG steam pipe network is connected with a steam turbine a1, and the steam turbine a1 extracts 0.5MPaG steam and sends the 0.5MPaG steam pipe network; the 4.0MPaG steam pipe network directly provides steam for the 2.5MPaG steam pipe network through a temperature and pressure reducer a2, the 2.5MPaG steam pipe network is connected with a steam turbine b5, and the steam turbine b5 extracts 0.5MPaG steam and sends the extracted steam to the 0.5MPaG steam pipe network; the 2.5MPaG steam pipe network directly provides steam for the 1.4MPaG steam pipe network through a temperature and pressure reducing device b 8; the 1.4MPaG steam pipe network is connected with a steam turbine c14, and the steam turbine c14 extracts 0.2MPaG steam and sends the extracted steam to the 0.2MPaG steam pipe network; the 1.4MPaG steam pipe network provides steam for the 0.6MPaG steam pipe network through a temperature and pressure reducer c 12; the 0.5MPaG steam pipe network is connected with the 0.2MPaG steam pipe network through a temperature and pressure reducing device e17, and the pressure is reduced through the 0.5MPaG steam pipe network to provide steam for the 0.2MPaG steam pipe network; the 1.4MPaG steam pipe network provides steam through a temperature and pressure reducer d15 and a 0.5MPaG steam pipe network, the temperature and pressure reducer a2, the temperature and pressure reducer b8, the temperature and pressure reducer c12, the temperature and pressure reducer d15, the temperature and pressure reducer h23 and the temperature and pressure reducer e17 are respectively provided with a pressure reducing valve and a temperature reducing valve, the steam turbine a1, the steam turbine b5 and the steam turbine c14 are back pressure turbines, the 4.0MPaG steam is superheated steam, and the temperature is 400 ℃; the steam of the 2.5MPaG, the 1.4MPaG, the 0.6MPaG, the 0.5MPaG and the 0.2MPaG is saturated steam under the pressure, bypasses are arranged between the steam inlet pipeline and the steam extraction pipeline of the steam turbine a1, the steam turbine b5 and the steam turbine c14, the bypasses are respectively provided with a temperature and pressure reducer which is respectively a temperature and pressure reducer f21, a temperature and pressure reducer g22 and a temperature and pressure reducer i 24, a separator a4 is arranged in front of the steam inlet pipeline of the steam turbine b5, a separator b13 is arranged in front of the steam inlet pipeline of the steam turbine c14, boiler feed water of any one temperature and pressure reducer is provided by a deaerator 18 through a boiler feed water pump 20, and the steam of the large steam drum 2.5MPaG is provided for a 2.5MPaG steam pipe network; the 1.4MPaG steam produced by the small steam drum is provided for a 1.4MPaG steam pipe network; 0.2MPaG steam is produced to flash tank 19 and is provided for 0.2MPaG steam pipe network, the produced lime set of 1.4MPaG steam user, 0.6MPaG steam user and 0.5MPaG steam user gets into flash tank 19, the produced lime set of 0.2MPaG steam user gets into deaerator 18, lime set among the flash tank 19 gets into deaerator 18 and supplements the liquid level for the deaerator, and unnecessary lime set is sent to the extra-border region desalination station outside the district, 0.5MPaG steam pipe network links to each other with deaerator 18, steam turbine a1 extraction pipeline export sets up a temperature and pressure reduction ware h 23.
The working principle of the invention is as follows:
the working mode of the energy system for the steam of the ethylene oxide glycol device is as follows: 4.0MPaG steam with the temperature of 400 ℃ from a steam pipe network of a whole plant enters a steam turbine a1, the steam turbine a1 drives a generator to generate electricity, and simultaneously 0.6MPaG steam is extracted to supplement the 0.5MPaG steam pipe network; a temperature and pressure reducer a2 is arranged on the 4.0MPaG steam pipe network and the 2.5MPaG steam pipe network, when a steam turbine a1 is not used for power generation, 4.0MPaG is directly adopted for reducing pressure to 2.5MPaG steam, and the pressure of the 2.5MPaG steam pipe network is controlled to be 2.5 +/-0.05 MPaG through a pressure gauge a 3. 2.5MPaG steam with the temperature of 226 ℃ from the 2.5MPaG steam pipe network enters a steam turbine b5, the steam turbine b5 drives a generator to generate electricity, 0.6MPaG steam is simultaneously extracted to be supplemented to the 0.5MPaG steam pipe network, and a steam inlet pipeline of the steam turbine b5 is provided with a separator a4 for separating moisture in saturated steam; the 2.5MPaG steam pipe network and the 1.4MPaG steam pipe network are provided with a temperature and pressure reducer b8, when a steam turbine b5 is not used for power generation, 2.5MPaG is directly adopted for pressure reduction to 1.4MPaG steam, and the pressure of the 1.4MPaG steam pipe network is controlled to be 1.4 +/-0.05 MPaG through a pressure gauge b 7. 1.4MPaG steam with the temperature of 198 ℃ from a 1.4MPaG steam pipe network enters a steam turbine c14, the steam turbine c14 drives a generator to generate electricity, 0.3MPaG steam is extracted to be supplemented to a 0.2MPaG steam pipe network, and a steam inlet pipeline of the steam turbine c14 is provided with a separator b13 for separating moisture in saturated steam; the 1.4MPaG steam pipe network and the 0.6MPaG steam pipe network are provided with a temperature and pressure reducer c12, the 1.4MPaG steam pipe network is directly adopted to reduce the pressure to 0.6MPaG steam, and the pressure of the 0.6MPaG steam pipe network is controlled to be 0.6 +/-0.02 MPaG through a pressure gauge d 11. The steam pipe network of 0.5MPaG with the temperature of 159 ℃ reduces the pressure to the steam pipe network of 0.2MPaG through a temperature and pressure reducer e17, the pressure of the steam pipe network of 0.5MPaG is controlled to be 0.5 +/-0.02 MPaG through a pressure gauge c 10, and the pressure of the steam pipe network of 0.2MPaG is controlled to be 0.2 +/-0.01 MPaG through a pressure gauge e 16. A bypass is arranged between the steam feeding pipeline and the steam extraction pipeline of the steam turbine a1, the steam turbine b5 and the steam turbine c14, and is used for directly reducing pressure through a temperature and pressure reducing device when the steam turbine is in emergency tripping, so that the fluctuation of a pipe network is prevented from being large.
The invention adopts three steam turbine units to generate electricity, on one hand, low-grade steam can be provided for an ethylene oxide device through steam extraction of a steam turbine, and the production requirement of the device is met; on the other hand, the steam turbine is used for generating electricity, so that the electricity consumption of the device is greatly reduced, the energy loss caused by directly reducing high-grade steam to low-grade steam is avoided, the energy consumption of the device is reduced, and the enterprise benefit is improved.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (10)
1. The utility model provides an ethylene oxide glycol device steam is with ability system, includes steam pipe network, steam turbine a (1), steam turbine b (5), steam turbine c (14), big steam pocket (6), little steam pocket (9), flash tank (19) and oxygen-eliminating device (18), its characterized in that: the steam pipe network comprises 6 pressure grades, namely a 4.0MPaG steam pipe network, a 2.5MPaG steam pipe network, a 1.4MPaG steam pipe network, a 0.6MPaG steam pipe network, a 0.5MPaG steam pipe network and a 0.2MPaG steam pipe network; the 4.0MPaG steam pipe network is connected with the steam turbine a (1), and the steam turbine a (1) pumps out 0.5MPaG steam and sends the steam to the 0.5MPaG steam pipe network; the 4.0MPaG steam pipe network directly provides steam for the 2.5MPaG steam pipe network through a temperature and pressure reducer a (2), the 2.5MPaG steam pipe network is connected with a steam turbine b (5), and the steam turbine b (5) extracts 0.5MPaG steam and sends the extracted steam to the 0.5MPaG steam pipe network; the 2.5MPaG steam pipe network directly provides steam for the 1.4MPaG steam pipe network through a temperature and pressure reducing device (b) 8; the 1.4MPaG steam pipe network is connected with a steam turbine c (14), and the steam turbine c (14) pumps out 0.2MPaG steam and sends the steam to the 0.2MPaG steam pipe network; the 1.4MPaG steam pipe network provides steam for the 0.6MPaG steam pipe network through a temperature and pressure reducer c (12); the 0.5MPaG steam pipe network is connected with the 0.2MPaG steam pipe network through a temperature and pressure reducer e (17), and the pressure is reduced through the 0.5MPaG steam pipe network to provide steam for the 0.2MPaG steam pipe network; the 1.4MPaG steam pipe network provides steam through a temperature and pressure reducer d (15) and a 0.5MPaG steam pipe network.
2. The energy system for ethylene oxide steam as claimed in claim 1, wherein: the steam turbine a (1), the steam turbine b (5) and the steam turbine c (14) are all back pressure type steam turbines.
3. The energy system for ethylene oxide steam as claimed in claim 1, wherein: the 4.0MPaG steam is superheated steam and the temperature is 400 ℃; the steam of 2.5MPaG, 1.4MPaG, 0.6MPaG, 0.5MPaG and 0.2MPaG is saturated steam at the pressure.
4. The energy system for ethylene oxide steam as claimed in claim 1, wherein: and bypasses are arranged between the steam inlet pipeline and the steam extraction pipeline of the steam turbine a (1), the steam turbine b (5) and the steam turbine c (14), and are respectively provided with a temperature and pressure reducer, namely a temperature and pressure reducer f (21), a temperature and pressure reducer g (22) and a temperature and pressure reducer i (24).
5. The energy system for ethylene oxide steam as claimed in claims 1 to 4, wherein a pressure reducing valve and a temperature reducing valve are arranged in any temperature and pressure reducer.
6. The system of claim 1, wherein: a separator a (4) is arranged in front of a steam inlet pipeline of the steam turbine b (5), and a separator b (13) is arranged in front of a steam inlet pipeline of the steam turbine c (14).
7. An ethylene oxide steam energy system according to claims 1-6, characterized in that: boiler feed water of any one of the temperature and pressure reducers is supplied by a deaerator (18) through a boiler feed water pump (20).
8. The energy system for ethylene oxide steam as claimed in claim 1, wherein: 2.5MPaG steam produced by the large steam drum is provided for a 2.5MPaG steam pipe network; the 1.4MPaG steam produced by the small steam drum is provided for a 1.4MPaG steam pipe network; the flash tank (19) produces 0.2MPaG steam for the 0.2MPaG steam pipe network.
9. The energy system for ethylene oxide steam as claimed in claim 1, wherein: the produced lime set of 1.4MPaG steam consumer, 0.6MPaG steam consumer and 0.5MPaG steam consumer gets into flash tank (19), the produced lime set of 0.2MPaG steam consumer gets into deaerator (18), lime set in flash tank (19) gets into deaerator (18) and for deaerator supplementary liquid level, and unnecessary lime set is sent to the outer desalination station of battery limits, 0.5MPaG steam pipe net links to each other with deaerator (18), steam turbine a (1) steam extraction pipeline export sets up one and subtracts temperature pressure reducer h (23).
10. A use method of an energy system for steam of an ethylene oxide glycol device comprises the following steps: the method comprises the following steps:
step one): 4.0MPaG steam with the temperature of 400 ℃ from a steam pipe network of a whole plant enters a steam turbine a1, the steam turbine a1 drives a generator to generate electricity, and simultaneously, 0.6MPaG steam is extracted to supplement the 0.5MPaG steam pipe network, and a bypass is arranged between a steam feeding pipeline and a steam extraction pipeline of the steam turbine a1 and used for directly reducing pressure through a temperature and pressure reducing device when the steam turbine is in emergency tripping so as to prevent the pipe network from greatly fluctuating;
step two), arranging a temperature and pressure reducer a2 for the 4.0MPaG steam pipe network and the 2.5MPaG steam pipe network, directly reducing the pressure to 2.5MPaG steam by adopting 4.0MPaG when a steam turbine a1 is not used for generating electricity, and controlling the pressure of the 2.5MPaG steam pipe network to be 2.5 +/-0.05 MPaG through a pressure gauge a 3;
step three), 2.5MPaG steam with the temperature of 226 ℃ from a 2.5MPaG steam pipe network enters a steam turbine b5, the steam turbine b5 drives a generator to generate electricity, 0.6MPaG steam is extracted to be supplemented to the 0.5MPaG steam pipe network, a steam inlet pipeline of the steam turbine b5 is provided with a separator a4 for separating moisture in saturated steam, and a bypass is arranged between a steam feeding pipeline and a steam extraction pipeline of the steam turbine b5 and used for directly reducing pressure through a temperature and pressure reducer when the steam turbine is in emergency trip, so that the pipe network is prevented from being fluctuated greatly;
step four), arranging a temperature and pressure reducer b8 on the 2.5MPaG steam pipe network and the 1.4MPaG steam pipe network, directly reducing the pressure to 1.4MPaG steam by adopting 2.5MPaG when a steam turbine b5 is not used for generating electricity, and controlling the pressure of the 1.4MPaG steam pipe network to be 1.4 +/-0.05 MPaG through a pressure gauge b 7;
step five), 1.4MPaG steam with the temperature of 198 ℃ from a 1.4MPaG steam pipe network enters a steam turbine c14, the steam turbine c14 drives a generator to generate electricity, 0.3MPaG steam is extracted to be supplemented to a 0.2MPaG steam pipe network, a steam inlet pipeline of the steam turbine c14 is provided with a separator b13 for separating moisture in saturated steam, and a bypass is arranged between a steam feeding pipeline and a steam extraction pipeline of the steam turbine c14 and used for directly reducing pressure through a temperature and pressure reducer when the steam turbine is in emergency trip, so that the fluctuation of the pipe network is prevented from being larger;
step six) arranging a temperature and pressure reducer c12 for the 1.4MPaG steam pipe network and the 0.6MPaG steam pipe network, directly reducing the pressure to 0.6MPaG steam by using the 1.4MPaG, and controlling the pressure of the 0.6MPaG steam pipe network to be 0.6 +/-0.02 MPaG through a pressure gauge d 11;
step seven), the steam pipe network of 0.5MPaG with the temperature of 159 ℃ reduces the pressure to the steam pipe network of 0.2MPaG through a temperature reduction pressure reducer e17, the pressure of the steam pipe network of 0.5MPaG is controlled to be 0.5 +/-0.02 MPaG through a pressure gauge c 10, and the pressure of the steam pipe network of 0.2MPaG is controlled to be 0.2 +/-0.01 MPaG through a pressure gauge e 16.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111362608.5A CN114087045B (en) | 2021-11-17 | 2021-11-17 | Energy utilization system for ethylene oxide glycol device steam and use method thereof |
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| CN202111362608.5A CN114087045B (en) | 2021-11-17 | 2021-11-17 | Energy utilization system for ethylene oxide glycol device steam and use method thereof |
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| CN114087045B CN114087045B (en) | 2023-03-07 |
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| CN202111362608.5A Active CN114087045B (en) | 2021-11-17 | 2021-11-17 | Energy utilization system for ethylene oxide glycol device steam and use method thereof |
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Citations (6)
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| JP2012092734A (en) * | 2010-10-27 | 2012-05-17 | Chugoku Electric Power Co Inc:The | Blow fluid treatment equipment in ejector main steam system |
| JP2012102711A (en) * | 2010-11-12 | 2012-05-31 | Chugoku Electric Power Co Inc:The | Temperature reducing device steam heat recovery facilities |
| JP2012233679A (en) * | 2011-04-20 | 2012-11-29 | Nippon Steel & Sumitomo Metal Corp | Steam supply system, and control method of the same |
| CN209485081U (en) * | 2018-12-24 | 2019-10-11 | 中石化南京工程有限公司 | A kind of waste heat recycling utilization system |
| CN112610941A (en) * | 2020-12-30 | 2021-04-06 | 中冶焦耐(大连)工程技术有限公司 | Low-grade waste heat recovery system and process of coking production system |
| CN112814745A (en) * | 2020-12-30 | 2021-05-18 | 中国电建集团河南省电力勘测设计院有限公司 | Energy-saving coupled comprehensive energy station system for chemical industry park |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012092734A (en) * | 2010-10-27 | 2012-05-17 | Chugoku Electric Power Co Inc:The | Blow fluid treatment equipment in ejector main steam system |
| JP2012102711A (en) * | 2010-11-12 | 2012-05-31 | Chugoku Electric Power Co Inc:The | Temperature reducing device steam heat recovery facilities |
| JP2012233679A (en) * | 2011-04-20 | 2012-11-29 | Nippon Steel & Sumitomo Metal Corp | Steam supply system, and control method of the same |
| CN209485081U (en) * | 2018-12-24 | 2019-10-11 | 中石化南京工程有限公司 | A kind of waste heat recycling utilization system |
| CN112610941A (en) * | 2020-12-30 | 2021-04-06 | 中冶焦耐(大连)工程技术有限公司 | Low-grade waste heat recovery system and process of coking production system |
| CN112814745A (en) * | 2020-12-30 | 2021-05-18 | 中国电建集团河南省电力勘测设计院有限公司 | Energy-saving coupled comprehensive energy station system for chemical industry park |
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