System for reducing energy consumption of light component pre-removal tower
The system addresses high energy consumption in pre-lightening towers by using a hot water and steam preheater with control mechanisms to stabilize temperature and reduce steam usage, achieving energy savings.
Patent Information
- Application Number
- CN202421176782.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The energy consumption of pre-lightening towers is high due to the need for steam heating of C5 raw materials, especially in low outdoor temperatures, leading to increased energy costs.
A system utilizing a hot water preheater and steam preheater in conjunction with valves and controllers to regulate temperature and flow, reducing the reliance on steam heating and stabilizing feed temperature control.
Reduces steam consumption and energy costs by utilizing a dual preheating method with hot water and steam, maintaining stable temperature control and reducing energy loss.
Smart Images
Figure CN222195952U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of chemical equipment systems, and in particular relates to a system for reducing the energy consumption of a pre-lightness removal tower. Background Art
[0002] At present, the main source of C5 raw materials for C5 cracking units is the by-product of ethylene cracking. The separation and comprehensive utilization of C5 is an important aspect of the rational use of petroleum resources and an effective way to reduce petrochemical production costs. Reducing the energy consumption of the pre-delightening tower of C5 raw materials is to tap the potential and increase the efficiency of the comprehensive utilization of C5 deep processing.
[0003] However, at present, the C5 raw material needs to be preheated with steam before entering the pre-delightening tower. However, if the outdoor temperature is low in winter, spring and autumn and there is a certain heat loss, a large amount of steam is consumed, which increases energy consumption. Utility Model Content
[0004] The utility model aims at the above-mentioned problem, makes up for the deficiencies of the prior art, and provides a system for reducing the energy consumption of a pre-light-removal tower; the utility model can further reduce the use of heating steam and reduce production energy consumption.
[0005] To achieve the above purpose, the utility model adopts the following technical solutions.
[0006] The utility model provides a system for reducing the energy consumption of a pre-delightening tower, comprising a pre-delightening tower, characterized in that a transverse feed port at an upper portion of the pre-delightening tower is connected to a C5 raw material conveying pipeline, a first valve is arranged on the C5 raw material conveying pipeline, a first section preheating inlet pipeline is branched out of the C5 raw material conveying pipeline between the first valve and the pre-delightening tower, the first section preheating inlet pipeline is connected to a hot water preheater pipe inlet, the hot water preheater pipe outlet is connected to a first section preheating outlet pipeline, the first section preheating outlet pipeline is branched into a first section preheating bypass and a second section preheating inlet pipeline, the first section preheating bypass is connected to a first preheating loop point of the C5 raw material conveying pipeline, the second section preheating inlet pipeline is connected to a steam preheater pipe inlet, the steam preheater pipe outlet is connected to the first section preheating outlet pipeline through the second section preheating outlet pipeline It is connected to the second preheating loop point of the C5 raw material conveying pipeline. A second valve is provided between the first preheating loop point and the second preheating loop point on the C5 raw material conveying pipeline. The gas phase outlet at the upper end of the pre-delightening tower is connected to the upper inlet of the front condenser, the lower outlet of the front condenser is connected to the upper inlet of a cold reflux tank, the lower outlet of a cold reflux tank is connected to the inlet of a reflux pump, the outlet of the reflux pump is connected to the horizontal reflux feed port on the pre-delightening tower through a section of pipeline, the outlet of the reflux pump is connected to another section of pipeline as the first production pipeline, the lower outlet of the pre-delightening tower is connected to the inlet of the tower kettle production pump, the tower kettle production pump outlet is connected to the second production pipeline, the lower heating port of the pre-delightening tower is connected to the liquid phase inlet of the reboiler, and the gas phase outlet of the reboiler is connected to the gas phase inlet of the lower tower kettle of the pre-delightening tower.
[0007] Furthermore, the hot water preheater shell inlet is connected to the hot water supply pipe, the hot water preheater shell outlet is connected to the hot water return pipe, the steam preheater shell inlet is connected to the steam pipe, and the steam preheater shell outlet is connected to the condensate pipe.
[0008] Furthermore, a third valve is provided on the first-stage preheating inlet pipeline, a fourth valve is provided on the first-stage preheating outlet pipeline, a fifth valve is provided on the first-stage preheating bypass pipeline, and a sixth valve is provided on the steam pipe.
[0009] Furthermore, the upper outlet of the front condenser is connected to the upper inlet of the rear condenser, the lower outlet of the rear condenser is connected to the upper inlet of the second condensate tank, the lower outlet of the second condensate tank is connected to the inlet of the condensate production pump, and the outlet of the condensate production pump is connected to the third production pipeline.
[0010] Furthermore, a seventh valve is provided on the first production pipeline, an eighth valve is provided on the second production pipeline, and a ninth valve is provided on the third production pipeline.
[0011] Furthermore, the first valve, the sixth valve, the seventh valve, the eighth valve and the ninth valve are all regulating valves, and the second valve, the third valve, the fourth valve and the fifth valve are all gate valves.
[0012] Furthermore, a flow transmitter and a flow controller are provided on the C5 raw material conveying pipeline. The flow transmitter is electrically connected to the flow controller, and the flow controller is electrically connected to the first valve.
[0013] Furthermore, a field temperature indicator is provided on the first section preheating outlet pipeline.
[0014] Furthermore, a temperature remote sensor and a temperature controller are provided on the second-stage preheating outlet pipeline, the temperature remote sensor is electrically connected to the temperature controller, and the temperature controller is electrically connected to the sixth valve.
[0015] Furthermore, the pre-delightening tower, the first cold reflux tank and the second condensate tank are respectively provided with liquid level remote sensors and liquid level controllers. The three liquid level remote sensors are electrically connected to the corresponding three liquid level controllers, the liquid level controller on the pre-delightening tower is electrically connected to the ninth valve, the liquid level controller on the first cold reflux tank is electrically connected to the seventh valve, and the liquid level controller on the second condensate tank is electrically connected to the eighth valve.
[0016] The beneficial effects of the utility model.
[0017] The utility model increases the feed temperature twice by means of a hot water preheater and a steam preheater, thereby effectively reducing the steam consumption of the original steam direct preheating, and the hot water preheating utilizes a circulation process without any loss of consumption, and also makes the feed temperature control more stable and less affected by the external temperature difference, thereby ultimately achieving the goal of reducing the energy consumption of the pre-delightening tower. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0019] Figure 1 It is a schematic diagram of the complete system connection structure of the utility model.
[0020] Markings in the figure: 1 is the first valve, 2 is the second valve, 3 is the third valve, 4 is the fourth valve, 5 is the fifth valve, 6 is the sixth valve, 7 is the seventh valve, 8 is the eighth valve, 9 is the ninth valve, 10 is the pre-light-removal tower, 11 is the C5 raw material delivery pipeline, 12 is the first section preheating inlet pipeline, 13 is the hot water preheater, 14 is the first section preheating outlet pipeline, 15 is the first section preheating bypass, 16 is the second section preheating inlet pipeline, 17 is the steam preheater, 18 is the second section preheating outlet pipeline, 19 is the front condenser, 20 is a cold reflux tank, 21 is the return Flow pump, 22 is the first production pipeline, 23 is the tower bottom production pump, 24 is the second production pipeline, 25 is the reboiler, 26 is the hot water supply pipe, 27 is the hot water return pipe, 28 is the steam pipe, 29 is the condensate pipe, 30 is the post-condenser, 31 is the second condensate tank, 32 is the condensate production pump, 33 is the third production pipeline, 34 is the flow remote transmitter, 35 is the flow controller, 36 is the on-site temperature indicator, 37 is the temperature remote transmitter, 38 is the temperature controller, 39 is the liquid level remote transmitter, and 40 is the liquid level controller. DETAILED DESCRIPTION
[0021] As shown in the accompanying drawings, the present embodiment provides a system for reducing the energy consumption of a pre-delightening tower, including a pre-delightening tower 10, wherein the upper lateral feed port of the pre-delightening tower 10 is connected to a C5 raw material delivery pipeline 11, a first valve 1 is provided on the C5 raw material delivery pipeline 11, and the C5 raw material delivery pipeline 11 branches out a first section preheating inlet pipeline 12 between the first valve 1 and the pre-delightening tower 10, the first section preheating inlet pipeline 12 is connected to a hot water preheater 13 pipe inlet, the hot water preheater 13 pipe outlet is connected to a first section preheating outlet pipeline 14, the first section preheating outlet pipeline 14 branches into a first section preheating bypass 15 and a second section preheating inlet pipeline 16, the first section preheating bypass 15 is connected to a first preheating loop point of the C5 raw material delivery pipeline 11, the second section preheating inlet pipeline 16 is connected to a steam preheater 17 pipe inlet, and the steam preheater 17 pipe outlet is connected to the second section preheating outlet pipeline 1 8 is connected to the second preheating loop point of the C5 raw material conveying pipeline 11, and a second valve 2 is arranged on the C5 raw material conveying pipeline 11 between the first preheating loop point and the second preheating loop point, the gas phase outlet at the upper end of the pre-delightening tower 10 is connected to the upper inlet of the front condenser 19, the lower outlet of the front condenser 19 is connected to the upper inlet of a cold reflux tank 20, the lower outlet of a cold reflux tank 20 is connected to the inlet of a reflux pump 21, the outlet of the reflux pump 21 is connected to the transverse reflux feed port on the pre-delightening tower 10 through a section of pipeline, the outlet of the reflux pump 21 is connected to another section of pipeline as the first extraction pipeline 22, the lower outlet of the pre-delightening tower 10 is connected to the inlet of the tower reactor extraction pump 23, the outlet of the tower reactor extraction pump 23 is connected to the second extraction pipeline 24, the lower heating port of the pre-delightening tower 10 is connected to the liquidus inlet of the reboiler 25, and the gas phase outlet of the reboiler 25 is connected to the gas phase inlet of the lower tower reactor of the pre-delightening tower 10.
[0022] The shell inlet of the hot water preheater 13 is connected to the hot water supply pipe 26, the shell outlet of the hot water preheater 13 is connected to the hot water return pipe 27, the shell inlet of the steam preheater 17 is connected to the steam pipe 28, and the shell outlet of the steam preheater 17 is connected to the condensate pipe 29.
[0023] A third valve 3 is provided on the first-stage preheating inlet pipeline 12 , a fourth valve 4 is provided on the first-stage preheating outlet pipeline 14 , a fifth valve 5 is provided on the first-stage preheating bypass 15 , and a sixth valve 6 is provided on the steam pipe 28 .
[0024] The upper outlet of the front condenser 19 is connected to the upper inlet of the rear condenser 30 , the lower outlet of the rear condenser 30 is connected to the upper inlet of the second condensate tank 31 , the lower outlet of the second condensate tank 31 is connected to the inlet of the condensate production pump 32 , and the outlet of the condensate production pump 32 is connected to the third production pipeline 33 .
[0025] The first production pipeline 22 is provided with a seventh valve 7 , the second production pipeline 24 is provided with an eighth valve 8 , and the third production pipeline 33 is provided with a ninth valve 9 .
[0026] The first valve 1 , the sixth valve 6 , the seventh valve 7 , the eighth valve 8 , and the ninth valve 9 are all regulating valves, and the second valve 2 , the third valve 3 , the fourth valve 4 , and the fifth valve 5 are all gate valves.
[0027] A flow transmitter 34 and a flow controller 35 are provided on the C5 raw material delivery pipeline 11. The flow transmitter 34 is electrically connected to the flow controller 35, and the flow controller 35 is electrically connected to the first valve 1. The flow transmitter 34 is used to monitor the flow and transmit the flow monitoring signal to the flow controller 35 through the flow transmitter 34, and then the flow controller 35 controls and adjusts the first valve 1.
[0028] The first-stage preheating outlet pipe 14 is provided with a field temperature indicator 36 for the field temperature after the first-stage preheating.
[0029] The second section preheating outlet pipeline 18 is provided with a temperature transmitter 37 and a temperature controller 38, the temperature transmitter 37 is electrically connected to the temperature controller 38, and the temperature controller 38 is electrically connected to the sixth valve 6. Since the second section preheating outlet pipeline 18 is connected to the C5 raw material delivery pipeline, the temperature transmitter 37 can be used to monitor the temperature of the C5 raw material delivery pipeline, and the temperature monitoring signal is transmitted to the temperature controller 38 through the temperature transmitter 37, and then the temperature controller 38 controls the regulating valve sixth valve 6. Due to the addition of the hot water preheater 13, the temperature transmitter 37 on the C5 raw material delivery pipeline indicates a stable state and the valve position of the sixth valve 6 is reduced, which ultimately reduces the steam heating usage of the steam preheater 17 and saves production costs.
[0030] The pre-light-removal tower 10, the first cold reflux tank 20, and the second condensate tank 31 are respectively provided with a liquid level remote transmitter 39 and a liquid level controller 40. The three liquid level remote transmitters 39 are respectively electrically connected to the corresponding three liquid level controllers 40. The liquid level controller 40 on the pre-light-removal tower 10 is electrically connected to the ninth valve 9, the liquid level controller 40 on the first cold reflux tank 20 is electrically connected to the seventh valve 7, and the liquid level controller 40 on the second condensate tank 31 is electrically connected to the eighth valve 8. The liquid level monitoring signal is transmitted to each liquid level controller 40 through each liquid level remote transmitter 39, and then each liquid level controller 40 controls and adjusts the corresponding seventh valve 7, eighth valve 8, and ninth valve 9.
[0031] When in use, the C5 raw material controls the raw material flow rate through the first valve 1 regulating valve, enters the hot water preheater 13 through the third valve 3 and begins to be preheated to a certain temperature, wherein the heat exchange medium of the hot water preheater 13 is hot water, and is heated by the circulation of hot water supply and hot water return water; after heating, the C5 raw material enters the steam preheater 17 through the fourth valve 4 and is preheated to the process control temperature, wherein the heating medium of the steam preheater 17 is steam, and is heated by steam, and the condensate is discharged back to the hot water for direct heating; the outlet temperature remote transmitter 37 of the steam preheater 17 transmits the signal to the temperature controller 38, and then the temperature controller 38 controls the opening of the sixth valve 6 to realize the control of the feed temperature of the C5 raw material. And through the different switch combinations of the second valve 2, the third valve 3, the fourth valve 4 and the fifth valve 5, it can meet the needs of various working conditions of process production, and realize the series connection, parallel connection or cut-out maintenance of the hot water preheater 13 and the steam preheater 17.
[0032] The C5 raw material is heated by a hot water preheater 13 and a steam preheater 17, and enters a pre-delightening tower 10 after reaching the process temperature. The C5 raw material in the tower is heated by a tower bottom reboiler 25 and forms a gas-liquid two-phase in the pre-delightening tower 10. The liquid level of the tower bottom liquid phase is monitored by a liquid level remote transmitter 39. The monitoring signal of the liquid level remote transmitter 39 is transmitted to a liquid level controller 40, and then the liquid level controller 40 controls the ninth valve 9 on the third production pipeline 33 at the outlet of the tower bottom production pump 23 to control the liquid level production device, thereby realizing the liquid level control of the tower bottom of the pre-delightening tower 10.
[0033] The gas phase is extracted at the top of the pre-delightening tower 10 and enters the front condenser 19 for condensation. The condensed material flows into a cold reflux tank 20, and then a part is extracted through a reflux pump 21 and returned to the pre-delightening tower 10 as reflux, and a part passes through the seventh valve 7 and is extracted from the first extraction pipeline 22.
[0034] In addition, the gas phase extracted from the top of the pre-delightening tower 10 that cannot be completely condensed by the front condenser 19 enters the rear condenser 30, flows into the second condensate tank 31 after secondary condensation, and then passes through the condensate extraction pump 32 and the eighth valve 8 to the extraction device from the second extraction pipeline 24.
[0035] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
Claims
1. A system for reducing energy consumption of a pre-delightening tower, comprising a pre-delightening tower (10), characterized in that: The upper lateral feed port of the pre-delightening tower (10) is connected to a C5 raw material delivery pipeline (11), a first valve (1) is provided on the C5 raw material delivery pipeline (11), the C5 raw material delivery pipeline (11) branches out a first section preheating inlet pipeline (12) between the first valve (1) and the pre-delightening tower (10), the first section preheating inlet pipeline (12) is connected to a pipe layer inlet of a hot water preheater (13), and a pipe layer outlet of the hot water preheater (13) is connected to the first section preheating outlet pipeline (12). 4), the first section preheating outlet pipeline (14) is branched into a first section preheating bypass (15) and a second section preheating inlet pipeline (16), the first section preheating bypass (15) is connected to the first preheating loop point of the C5 raw material delivery pipeline (11), the second section preheating inlet pipeline (16) is connected to the inlet of the steam preheater (17) pipe layer, and the outlet of the steam preheater (17) pipe layer is connected to the second outlet of the C5 raw material delivery pipeline (11) through the second section preheating outlet pipeline (18). On the preheating loop point, a second valve (2) is provided on the C5 raw material delivery pipeline (11) between the first preheating loop point and the second preheating loop point, the upper gas phase outlet of the pre-light-removing tower (10) is connected to the upper inlet of the front condenser (19), the lower outlet of the front condenser (19) is connected to the upper inlet of a cold reflux tank (20), the lower outlet of the cold reflux tank (20) is connected to the inlet of a reflux pump (21), and the outlet of the reflux pump (21) is connected to the pre-light-removing tower (10) through a section of pipeline. The outlet of the reflux pump (21) is connected to another section of pipeline as a first extraction pipeline (22); the outlet of the pre-delightening tower (10) is connected to the inlet of the tower bottom extraction pump (23); the outlet of the tower bottom extraction pump (23) is connected to the second extraction pipeline (24); the heating port at the lower end of the pre-delightening tower (10) is connected to the liquid phase inlet of the reboiler (25); and the gas phase outlet of the reboiler (25) is connected to the gas phase inlet of the lower tower bottom of the pre-delightening tower (10).
2. The system for reducing energy consumption of a pre-lightness removal tower according to claim 1, characterized in that: The shell inlet of the hot water preheater (13) is connected to a hot water supply pipe (26), the shell outlet of the hot water preheater (13) is connected to a hot water return pipe (27), the shell inlet of the steam preheater (17) is connected to a steam pipe (28), and the shell outlet of the steam preheater (17) is connected to a condensate pipe (29).
3. The system for reducing energy consumption of a pre-lightness removal tower according to claim 2, characterized in that: A third valve (3) is provided on the first-stage preheating inlet pipeline (12), a fourth valve (4) is provided on the first-stage preheating outlet pipeline (14), a fifth valve (5) is provided on the first-stage preheating bypass pipeline (15), and a sixth valve (6) is provided on the steam pipe (28).
4. The system for reducing energy consumption of a pre-lightness removal tower according to claim 3, characterized in that: The upper outlet of the front condenser (19) is connected to the upper inlet of the rear condenser (30), the lower outlet of the rear condenser (30) is connected to the upper inlet of the second condensate tank (31), the lower outlet of the second condensate tank (31) is connected to the inlet of the condensate extraction pump (32), and the outlet of the condensate extraction pump (32) is connected to the third extraction pipeline (33).
5. The system for reducing energy consumption of a pre-light-removal tower according to claim 4, characterized in that: The first production pipeline (22) is provided with a seventh valve (7), the second production pipeline (24) is provided with an eighth valve (8), and the third production pipeline (33) is provided with a ninth valve (9).
6. The system for reducing energy consumption of a pre-light-removal tower according to claim 5, characterized in that: The first valve (1), the sixth valve (6), the seventh valve (7), the eighth valve (8) and the ninth valve (9) are all regulating valves, and the second valve (2), the third valve (3), the fourth valve (4) and the fifth valve (5) are all gate valves.
7. The system for reducing energy consumption of a pre-lightness removal tower according to claim 6, characterized in that: A flow remote transmitter (34) and a flow controller (35) are provided on the C5 raw material conveying pipeline (11); the flow remote transmitter (34) is electrically connected to the flow controller (35); and the flow controller (35) is electrically connected to the first valve (1).
8. The system for reducing energy consumption of a pre-light-removal tower according to claim 7, characterized in that: An on-site temperature indicator (36) is provided on the first-stage preheating outlet pipeline (14).
9. The system for reducing energy consumption of a pre-light-removal tower according to claim 8, characterized in that: A temperature remote sensor (37) and a temperature controller (38) are provided on the second-stage preheating outlet pipeline (18); the temperature remote sensor (37) is electrically connected to the temperature controller (38); and the temperature controller (38) is electrically connected to the sixth valve (6).
10. The system for reducing energy consumption of a pre-light-removal tower according to claim 9, characterized in that: A liquid level remote transmitter (39) and a liquid level controller (40) are respectively provided on the pre-delightening tower (10), the first cold reflux tank (20), and the second condensate tank (31). The three liquid level remote transmitters (39) are respectively electrically connected to the corresponding three liquid level controllers (40). The liquid level controller (40) on the pre-delightening tower (10) is electrically connected to the ninth valve (9), the liquid level controller (40) on the first cold reflux tank (20) is electrically connected to the seventh valve (7), and the liquid level controller (40) on the second condensate tank (31) is electrically connected to the eighth valve (8).