Heat supply system for rectifying tower reboiler of organic silicon device

Abstract

The utility model provides a heat supply system for rectifying tower reboilers of an organic silicon device, which is characterized in that the bottom of a first rectifying tower is connected with a reboiler I, an inlet steam pipeline is arranged above the reboiler I and is connected with a high-pressure steam pipeline, a pipeline is arranged below the reboiler I and is connected with a steam-water separator, and the bottom of the steam-water separator is connected with a flash tank through a high-pressure steam condensate pipeline; the top of the flash tank is connected with an inlet steam pipeline above the reboiler II through a low-pressure steam pipeline; the reboiler II is connected with the second rectifying tower; and the lower part of the reboiler II is connected with a low-pressure steam condensed water pipeline. The condensate water of the steam with pressure is recycled to the flash tank, low-pressure steam is produced through flash evaporation of high-pressure hot water, heat is supplied to the reboiler, a condenser does not need to be arranged, steam emptying is avoided, steam consumption is reduced, and meanwhile, the hot water with pressure is converted into normal-pressure hot water.

Description

Technical Field

[0001] The utility model relates to a heating system for a reboiler of a distillation tower of an organosilicon device, belonging to the technical field of organosilicon production. Background Art

[0002] The reboiler in the distillation column of an organosilicon monomer separation unit typically uses high-pressure steam for heating. This consumes large amounts of steam and energy, accounting for over 80% of the entire organosilicon production unit. This significant energy consumption translates to high production costs, and the large amount of coal burned pollutes the environment. Furthermore, the high-pressure steam generates a large amount of pressurized steam condensate after heat exchange, which needs to be converted to atmospheric hot water for storage or transportation.

[0003] Therefore, it is necessary to design a heating system for the reboiler of the distillation tower of an organosilicon device to solve the above problems. Utility Model Content

[0004] In response to the above problems, the utility model provides a heating system for the distillation tower reboiler of an organosilicon device, which recovers the pressurized steam condensate to a flash tank, produces low-pressure steam through flash distillation of high-pressure hot water, and heats the distillation tower reboiler, thereby reducing steam consumption and converting the pressurized hot water into normal-pressure hot water at the same time.

[0005] A heating system for a distillation tower reboiler of an organosilicon device, wherein the bottom of a first distillation tower is connected to a first reboiler, an inlet steam pipe is provided above the first reboiler to connect to a high-pressure steam pipe, a pipe is provided below the first reboiler to connect to a steam-water separator, the bottom of the steam-water separator is connected to a flash tank via a high-pressure steam condensate pipe, and the top of the flash tank is connected to an inlet steam pipe above a second reboiler via a low-pressure steam pipe; the second reboiler is connected to a second distillation tower, and a low-pressure steam condensate pipe is connected below the second reboiler.

[0006] The inlet steam pipeline above the reboiler 2 is connected to the medium-pressure steam pipeline, and the lower part of the reboiler 2 is connected to the flash tank through the medium-pressure steam condensate pipeline.

[0007] The high-pressure steam pipeline is provided with a flow meter, a flow control valve and a pressure gauge.

[0008] The second reboiler inlet steam pipeline is provided with a second flow meter, a second flow control valve and a second pressure gauge.

[0009] The flash tank is provided with a flash tank thermometer, a flash tank pressure gauge and a liquid level gauge, and a pressure control valve is provided on the low-pressure steam pipeline.

[0010] The steam-water separator is provided with a liquid level gauge; the high-pressure steam condensate pipeline is provided with a liquid level control valve.

[0011] A pipeline is provided on the top of the steam-water separator to connect with the high-pressure steam pipeline.

[0012] The top and bottom of the reboiler 1 are both connected to the first distillation tower through pipelines; the top and bottom of the reboiler 2 are both connected to the second distillation tower through pipelines.

[0013] A normal pressure hot water outlet is provided at the bottom of the flash tank.

[0014] The high-pressure steam pipe is a 1.0MPaG steam pipe, the low-pressure steam pipe is a 0.2MPaG steam pipe, the medium-pressure steam pipe is a 0.5MPaG steam pipe, the high-pressure steam condensate pipe is a 1.0MPaG steam condensate pipe, the low-pressure steam condensate pipe is a 0.2MPaG steam condensate pipe, and the medium-pressure steam condensate pipe is a 0.5MPaG steam condensate pipe.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The second distillation tower can use medium-pressure steam or low-pressure steam for heating, which can be flexibly adjusted according to production conditions in actual production;

[0017] 2. Low-pressure steam is produced by flash distillation of high-pressure steam or medium-pressure steam, saving a lot of energy consumption;

[0018] 3. High-pressure hot water flash evaporation produces low-pressure steam, which is then converted into normal-pressure hot water, which can be directly stored or transported without the need for additional equipment or processes for further conversion and treatment;

[0019] 4. The flashed steam provides heat to the second distillation tower and then condenses, eliminating the need for a condenser and avoiding steam venting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the device of the present utility model.

[0021] Explanation of the markings in the figure: T1: first distillation tower, T2: second distillation tower, E1: reboiler 1, E2: reboiler 2, V1: flash tank, V2: steam-water separator, S2: low-pressure steam pipeline, S5: medium-pressure steam pipeline, S10: high-pressure steam pipeline, C2: low-pressure steam condensate pipeline, C5: medium-pressure steam condensate pipeline, C10: high-pressure steam condensate pipeline, 1: flow meter 1, 2: flow control valve 1, 3: pressure gauge 1, 4: flow meter 2, 5: flow control valve 2, 6: pressure gauge 2, 7: flash tank thermometer, 8: flash tank pressure gauge, 9: liquid level gauge 1, 10: pressure control valve, 11: liquid level control valve, 12: liquid level gauge 2, 13: atmospheric pressure hot water outlet. DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be described in detail below with reference to the examples. The following examples are only used to illustrate the present invention and should not be considered as limiting the scope of the present invention.

[0023] Example 1

[0024] like Figure 1 As shown, a heating system for a distillation tower reboiler of an organosilicon device is provided. The bottom of the first distillation tower T1 is connected to the reboiler E1. An inlet steam pipe connected to the high-pressure steam pipe S10 is provided above the reboiler E1. A pipe connected to the steam-water separator V2 is provided below the reboiler E1. The bottom of the steam-water separator V2 is connected to the flash tank V1 via the high-pressure steam condensate pipe C10. The top of the flash tank V1 is connected to the inlet steam pipe above the reboiler E2 via the low-pressure steam pipe S2. The reboiler E2 is connected to the second distillation tower T2, and the low-pressure steam condensate pipe C2 is connected below the reboiler E2.

[0025] The inlet steam pipeline above the second reboiler E2 is connected to the medium-pressure steam pipeline S5, and the lower part of the second reboiler E2 is connected to the flash tank V1 through the medium-pressure steam condensate pipeline C5.

[0026] The high-pressure steam pipeline S10 is provided with a flow meter 1, a flow control valve 2 and a pressure gauge 3.

[0027] The reboiler E2 inlet steam pipe is provided with a flow meter 4, a flow control valve 5 and a pressure gauge 6.

[0028] The flash tank V1 is provided with a flash tank thermometer 7, a flash tank pressure gauge 8 and a liquid level gauge 9, and a pressure control valve 10 is provided on the low-pressure steam pipe S2.

[0029] The steam-water separator V2 is provided with a liquid level gauge 12, and the high-pressure steam condensate pipe C10 is provided with a liquid level control valve 11.

[0030] A pipe is provided on the top of the steam-water separator V2 to connect with the high-pressure steam pipe S10.

[0031] The top and bottom of the reboiler E1 are connected to the first distillation tower T1 through pipelines; the top and bottom of the reboiler E2 are connected to the second distillation tower T2 through pipelines.

[0032] A normal pressure hot water outlet 13 is provided at the bottom of the flash tank V1.

[0033] The high-pressure steam pipe S10 is a 1.0MPaG steam pipe, the low-pressure steam pipe S2 is a 0.2MPaG steam pipe, the medium-pressure steam pipe S5 is a 0.5MPaG steam pipe, the high-pressure steam condensate pipe C10 is a 1.0MPaG steam condensate pipe, the low-pressure steam condensate pipe C2 is a 0.2MPaG steam condensate pipe, and the medium-pressure steam condensate pipe C5 is a 0.5MPaG steam condensate pipe.

[0034] The steam-water separator V2 is connected to the rear of the pressure gauge 3.

[0035] Example 2

[0036] The working process of this utility model is as follows:

[0037] Using the apparatus of Example 1, 1.0 MPaG steam enters the shell side of the reboiler-E1 through the high-pressure steam pipe S10, and the material in the first distillation tower T1 enters the tube side of the reboiler-E1 through the bottom pipe of the tower, and the steam and the material exchange heat; the vaporized material enters the first distillation tower T1 through the top of the reboiler-E1, and the steam and liquefied water enter the steam-water separator V2 through the pipe below the reboiler-E1 for gas-liquid separation; the separated steam flows out from the top of the steam-water separator V2 and again passes through the inlet steam above the reboiler-E1. The steam pipeline enters the reboiler E1, and the separated liquid phase enters the flash tank V1 through the high-pressure steam condensate pipeline C10, and is converted into 0.2MPaG low-pressure steam in the flash tank V1, and enters the shell side of the reboiler E2 through the low-pressure steam pipeline S2. The material in the second distillation tower T2 enters the tube side of the reboiler E2 through the bottom pipeline of the tower, and the steam and the material exchange heat; the vaporized material enters the second distillation tower T2 through the top of the reboiler E2, and the condensed water flows out through the low-pressure steam condensate pipeline C2 below the reboiler E2.

[0038] Reboiler 2 E2 can also be connected to 0.5MPaG steam through the medium-pressure steam pipe S5. The 0.5MPaG steam enters the shell side of reboiler 2 E2 and exchanges heat with the material in the tube side; the condensed water enters the flash tank V1 through the medium-pressure steam condensate pipe C5 and is converted into 0.2MPaG low-pressure steam.

[0039] A normal pressure hot water outlet is provided at the bottom of the flash tank V1. The normal pressure hot water after flash evaporation flows out through the outlet at the bottom of the flash tank V1 and can also be stored in the flash tank V1.

[0040] The head end of the high-pressure steam pipeline S10 is provided with a flow meter 1, a flow control valve 2 and a pressure gauge 3 for monitoring and controlling the flow of 1.0 MPaG high-pressure steam.

[0041] In this embodiment, the reboiler E1 uses 1.0 MPaG high-pressure steam as the heat source; the reboiler E2 can use either 0.5 MPaG medium-pressure steam or 0.2 MPaG low-pressure steam as the heat source; the low-pressure steam is produced by flash evaporation.

Claims

1. A heating system for a distillation tower reboiler of an organosilicon device, characterized in that: The bottom of the first distillation tower (T1) is connected to the reboiler 1 (E1), and an inlet steam pipe is provided above the reboiler 1 (E1) to connect to the high-pressure steam pipe (S10). A pipe is provided below the reboiler 1 (E1) to connect to the steam-water separator (V2). The bottom of the steam-water separator (V2) is connected to the flash tank (V1) via the high-pressure steam condensate pipe (C10), and the top of the flash tank (V1) is connected to the inlet steam pipe above the reboiler 2 (E2) via the low-pressure steam pipe (S2); the reboiler 2 (E2) is connected to the second distillation tower (T2), and the bottom of the reboiler 2 (E2) is connected to the low-pressure steam condensate pipe (C2).

2. The organic silicon device distillation tower reboiler heating system according to claim 1, characterized in that: The inlet steam pipe above the reboiler 2 (E2) is connected to the medium-pressure steam pipe (S5), and the lower part of the reboiler 2 (E2) is connected to the flash tank (V1) through the medium-pressure steam condensate pipe (C5).

3. The organic silicon device distillation tower reboiler heating system according to claim 1 or 2, characterized in that: A flow meter (1), a flow control valve (2) and a pressure gauge (3) are provided on the high-pressure steam pipeline (S10).

4. The organic silicon device distillation tower reboiler heating system according to claim 1 or 2, characterized in that: A flow meter 2 (4), a flow control valve 2 (5) and a pressure gauge 2 (6) are provided on the steam inlet pipe of the reboiler 2 (E2).

5. The organic silicon device distillation tower reboiler heating system according to claim 1 or 2, characterized in that: The flash tank (V1) is provided with a flash tank thermometer (7), a flash tank pressure gauge (8) and a liquid level gauge (9), and a pressure control valve (10) is provided on the low-pressure steam pipe (S2).

6. The organic silicon device distillation tower reboiler heating system according to claim 1 or 2, characterized in that: The steam-water separator (V2) is provided with a second liquid level gauge (12), and the high-pressure steam condensate pipe (C10) is provided with a liquid level control valve (11).

7. The organic silicon device distillation tower reboiler heating system according to claim 1 or 2, characterized in that: A pipe is provided on the top of the steam-water separator (V2) and is connected to the high-pressure steam pipe (S10).

8. The organic silicon device distillation tower reboiler heating system according to claim 1 or 2, characterized in that: The top and bottom of the reboiler 1 (E1) are connected to the first distillation tower (T1) through pipelines; the top and bottom of the reboiler 2 (E2) are connected to the second distillation tower (T2) through pipelines.

9. The organic silicon device distillation tower reboiler heating system according to claim 1 or 2, characterized in that: A normal pressure hot water outlet (13) is provided at the bottom of the flash tank (V1).

10. The organic silicon device distillation tower reboiler heating system according to claim 2, characterized in that: The high-pressure steam pipe (S10) is a 1.0MPaG steam pipe, the low-pressure steam pipe (S2) is a 0.2MPaG steam pipe, the medium-pressure steam pipe (S5) is a 0.5MPaG steam pipe, the high-pressure steam condensate pipe (C10) is a 1.0MPaG steam condensate pipe, the low-pressure steam condensate pipe (C2) is a 0.2MPaG steam condensate pipe, and the medium-pressure steam condensate pipe (C5) is a 0.5MPaG steam condensate pipe.

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