Device for preventing trichlorobenzene from being solidified in benzoyl chloride device

Abstract

The utility model discloses a device for preventing trichlorobenzene from being solidified in a benzoyl chloride device, which comprises a rectifying tower, the tower top of the rectifying tower is fixedly connected with a tower top condenser, the tower top condenser is fixedly connected with a hot water heat exchanger through a third connecting pipeline, and the hot water heat exchanger is fixedly connected with a circulating water return pipeline. A circulating water feeding pipeline is fixedly connected to the hot water heat exchanger, a second valve is arranged on the circulating water feeding pipeline, the hot water heat exchanger is fixedly connected with a hot water expansion tank through a fourth connecting pipeline, a thermometer is fixedly connected to the fourth connecting pipeline, a liquid level meter is fixedly connected into the hot water expansion tank, and an air pipeline is fixedly connected to the hot water expansion tank. A water supplementing pipeline is fixedly connected to the hot water expansion tank, a first valve is arranged on the water supplementing pipeline, the hot water expansion tank is fixedly connected with a hot water circulating pump through a first connecting pipeline, and the hot water circulating pump is fixedly connected with the tower top condenser through a second connecting pipeline. And the problem of production interruption caused by solidification of trichlorobenzene in the tower top condenser can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to trichlorobenzene anti freezing technology field especially relates to a device for preventing trichlorobenzene from freezing in benzoyl chloride device. BACKGROUND

[0002] In benzoyl chloride production device, trichlorobenzene is the derivative of main product, generally accompanying main product produces, but because trichlorobenzene freezing point is 65 DEG C, in the conventional rectifying column system, tower top cooler refrigerant temperature control is at 25-35 DEG C, lead to trichlorobenzene in condenser freeze, block condenser heat exchange pipe, cause process interruption, influence the continuity of production. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a device for preventing trichlorobenzene from freezing in benzoyl chloride device, through increasing hot water expansion tank, circulating pump, heat exchanger and control system, stabilizing hot water temperature and liquid level, ensure that tower top condenser runs with suitable temperature (70-75 DEG C), prevent freezing, fine control hot water temperature (65-70 DEG C) simultaneously, be beneficial to the promotion integral separation efficiency and stability, prevent trichlorobenzene from freezing in tower top condenser, cause condenser heat exchange pipe blockage, interrupt the production problem.

[0004] The utility model discloses still provide with above-mentioned one kind in benzoyl chloride device prevent trichlorobenzene freezing device, include: rectifying column, the tower top of rectifying column is fixedly connected with tower top condenser, tower top condenser passes through connecting pipeline three and is fixedly connected with hot water heat exchanger, hot water heat exchanger is fixedly connected with circulating water return water pipeline, hot water heat exchanger is fixedly connected with circulating water upper water pipeline, be provided with valve no.

[0005] According to the device for preventing trichlorobenzene from freezing in benzoyl chloride device, the top of the rectifying column is provided with a rectifying column tower top gas phase outlet, and the rectifying column is fixedly connected with a rectifying column discharge pipeline, and the above device is beneficial to ensuring production.

[0006] The device for preventing trichlorobenzene from solidifying in a benzoyl chloride device has the temperature meter and the liquid level meter with control functions, and the above device is beneficial to adjusting the temperature and the liquid level in the system.

[0007] The device for preventing trichlorobenzene from solidifying in a benzoyl chloride device has the one end of the connecting pipeline four and the hot water expansion tank connected located above the hot water expansion tank, the one end of the connecting pipeline one and the hot water expansion tank connected located below the hot water expansion tank, and the above device is beneficial to discharging and pressure control of the gas in the hot water expansion tank.

[0008] The device for preventing trichlorobenzene from solidifying in a benzoyl chloride device has the one end of the connecting pipeline four and the hot water expansion tank connected located above the hot water expansion tank, the one end of the connecting pipeline one and the hot water expansion tank connected located below the hot water expansion tank, and the above device is beneficial to discharging and pressure control of the gas in the hot water expansion tank.

[0009] The device for preventing trichlorobenzene from solidifying in a benzoyl chloride device has the one end of the connecting pipeline four and the hot water expansion tank connected located above the hot water expansion tank, the one end of the connecting pipeline one and the hot water expansion tank connected located below the hot water expansion tank, and the above device is beneficial to discharging and pressure control of the gas in the hot water expansion tank. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model will be further explained in connection with the drawings and embodiments;

[0011] Figure 1 It is flow chart of the device for preventing trichlorobenzene from solidifying in a benzoyl chloride device of the utility model.

[0012] LEGEND:

[0013] 1, rectifying tower;2, rectifying tower discharge pipeline;3, overhead condenser;4, rectifying tower overhead gas phase outlet;5, hot water heat exchanger;6, circulating water backwater pipeline;7, valve one;8, water supply pipeline;9, circulating water water supply pipeline;10, thermometer;11, empty pipeline;12, hot water expansion tank;13, liquid level meter;14, hot water circulating pump;15, valve two;16, connecting pipeline one;17, connecting pipeline two;18, connecting pipeline three;19, connecting pipeline four. DETAILED DESCRIPTION

[0014] The detailed embodiments of the utility model will be described in detail in this part, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0015] Referring to Figure 1 The utility model discloses a device for preventing trichlorobenzene from solidifying in a benzoyl chloride device, which comprises a rectifying tower 1, a rectifying tower overhead gas phase outlet 4 arranged at the top end of the rectifying tower 1, a rectifying tower discharge pipeline 2 fixedly connected to the rectifying tower 1, a tower top condenser 3 fixedly connected to the top end of the rectifying tower 1, a hot water heat exchanger 5 fixedly connected to the tower top condenser 3 through a connecting pipeline three 18, one end of the connecting pipeline three 18 fixedly connected to the tower top condenser 3 being located above the tower top condenser 3, a circulating water return pipeline 6 fixedly connected to the hot water heat exchanger 5, one end of the circulating water return pipeline 6 and the connecting pipeline three 18 fixedly connected to the hot water heat exchanger 5 being located on the right side of the hot water heat exchanger 5, a circulating water supply pipeline 9 fixedly connected to the hot water heat exchanger 5, a valve two 15 arranged on the circulating water supply pipeline 9, a hot water expansion tank 12 fixedly connected to the hot water heat exchanger 5 through a connecting pipeline four 19, one end of the circulating water supply pipeline 9 and the connecting pipeline four 19 fixedly connected to the hot water heat exchanger 5 being located on the left side of the hot water heat exchanger 5, and a thermometer 10 (TIC) fixedly connected to the connecting pipeline four 19, the thermometer 10 (TIC) having a control function.

[0016] Specifically, the rectifying tower 1 is mainly used for rectifying and separating trichlorobenzene, the rectifying tower discharge pipeline 2 is connected to the rectifying tower to discharge the material after rectification, the tower top condenser 3 is located at the top end of the rectifying tower 1 for condensation and cooling, the rectifying tower overhead gas phase outlet 4 serves as the outlet at the top end of the rectifying tower to release the gas phase material from the top of the tower, the hot water heat exchanger 5 exchanges heat with the medium in the tower top condenser 3 through circulating water to control the temperature of the medium, the circulating water return pipeline 6 returns the circulating water in the hot water heat exchanger 5 to a circulating water system, the circulating water supply pipeline 9 supplies circulating water to the hot water heat exchanger 5, the hot water expansion tank 12 stores and expands hot water to maintain the stability of the pressure and liquid level in the system, and the thermometer 10 (TIC) detects the temperature of the medium after the hot water heat exchanger and controls the opening degree of the valve two 15 arranged on the circulating water supply pipeline 9 to maintain the temperature of the medium between 65-70 DEG C.

[0017] The hot water expansion tank 12 is fixedly connected with a liquid level gauge 13, the liquid level gauge 13 has a control function, the hot water expansion tank 12 is fixedly connected with a vent line 11, the hot water expansion tank 12 is fixedly connected with a water supplement line 8, the water supplement line 8 is provided with a valve 7, one end of the vent line 11, the water supplement line 8 and a connecting line four 19 connected with the hot water expansion tank 12 is located above the hot water expansion tank 12, the hot water expansion tank 12 is fixedly connected with a hot water circulating pump 14 through a connecting line one 16, one end of the connecting line one 16 connected with the hot water expansion tank 12 is located below the hot water expansion tank 12, the hot water circulating pump 14 is fixedly connected with the overhead condenser 3 through a connecting line two 17, one end of the connecting line two 17 fixedly connected with the overhead condenser 3 is located below the overhead condenser 3.

[0018] Specifically, the water supplement line 8 supplements tap water into the hot water expansion tank 12 to maintain the liquid level in the tank, the liquid level gauge 13 detects the liquid level in the hot water expansion tank 12 and maintains the liquid level stable by controlling the valve 7 on the water supplement line 8, the vent line 11 releases the excess pressure in the hot water expansion tank 12 to prevent the tank body from being broken, and the hot water circulating pump 14 sends the hot water in the hot water expansion tank 12 to the overhead condenser 3 as a heat exchange medium.

[0019] Working principle: tap water enters the hot water expansion tank 12 through the water supplement line 8, the liquid level gauge 13 detects the liquid level in the tank and maintains the liquid level stable by controlling the valve 7 on the water supplement line 8, the hot water circulating pump 14 pumps the hot water in the hot water expansion tank 12 to the overhead condenser 3 as a heat exchange medium, the medium in the overhead condenser 3 is condensed and then enters the hot water heat exchanger 5 through the connecting line three 18 to exchange heat, the hot water heat exchanger 5 uses the uninterrupted circulating water supplied by a factory as a heat exchange medium, the temperature of the medium is detected by a thermometer 10 (TIC) and the opening of the valve 15 provided on the circulating water supply line 9 is controlled to maintain the temperature of the medium between 65-70℃, the medium after heat exchange returns to the hot water expansion tank 12 through the connecting line four 19 to complete a cycle, and the vent line 11 releases the excess pressure in the hot water expansion tank 12 to prevent the tank body from being broken.

[0020] The above describes the embodiments of the utility model in detail in combination with the drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model.

Claims

1. A device for preventing the solidification of trichlorobenzene in a benzoyl chloride plant, characterized in that, Include: Rectifying tower (1), the top of the rectifying tower (1) is fixedly connected with the overhead condenser (3), the overhead condenser (3) is fixedly connected with hot water heat exchanger (5) through connecting pipeline three (18), the hot water heat exchanger (5) is fixedly connected with circulating water return water pipeline (6), the hot water heat exchanger (5) is fixedly connected with circulating water up water pipeline (9), valve two (15) is arranged on the circulating water up water pipeline (9), the hot water heat exchanger (5) is fixedly connected with hot water expansion tank (12) through connecting pipeline four (19), connecting pipeline four (19) is fixedly connected with thermometer (10), hot water expansion tank (12) is fixedly connected with liquid level meter (13) in, hot water expansion tank (12) is fixedly connected with the pipeline (11) to the sky, hot water expansion tank (12) is fixedly connected with the water replenishing pipeline (8), valve one (7) is arranged on the water replenishing pipeline (8), hot water expansion tank (12) is fixedly connected with hot water circulating pump (14) through connecting pipeline one (16), hot water circulating pump (14) is fixedly connected with overhead condenser (3) through connecting pipeline two (17).

2. A device for preventing the solidification of trichlorobenzene in a benzoyl chloride plant according to claim 1, characterized in that The top of the rectifying tower (1) is provided with rectifying tower overhead gas phase outlet (4), and the rectifying tower (1) is fixedly connected with rectifying tower discharge pipeline (2).

3. A device for preventing the solidification of trichlorobenzene in a benzoyl chloride plant according to claim 1, characterized in that, The thermometer (10) and liquid level meter (13) both have control function.

4. A device for preventing the solidification of trichlorobenzene in a benzoyl chloride plant according to claim 1, characterized in that, The one end of the air pipeline (11), water replenishing pipeline (8), connecting pipeline four (19) and hot water expansion tank (12) is located above the hot water expansion tank (12), and the one end of connecting pipeline one (16) and hot water expansion tank (12) is located below the hot water expansion tank (12).

5. A device for preventing the solidification of trichlorobenzene in a benzoyl chloride plant according to claim 1, characterized in that, The one end of the circulating water up water pipeline (9), connecting pipeline four (19) and hot water heat exchanger (5) is located on the left side of the hot water heat exchanger (5), and the one end of the circulating water return water pipeline (6), connecting pipeline three (18) and hot water heat exchanger (5) is located on the right side of the hot water heat exchanger (5).

6. A device for preventing the solidification of trichlorobenzene in a benzoyl chloride plant according to claim 1, characterized in that, The one end of connecting pipeline two (17) and overhead condenser (3) is located below the overhead condenser (3), and the one end of connecting pipeline three (18) and overhead condenser (3) is located above the overhead condenser (3).

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