Method for controlling temperature of crude oil for emulsion of rolling mill and control device

A temperature control method and emulsion technology, applied in the direction of transportation of passenger cars, tank cars, railway car body parts, etc., can solve the problems of inconvenient maintenance and repair of equipment, uneven heating of crude oil tanks, and affecting the quality of crude oil, etc., to achieve easy maintenance, Good heating effect and strong temperature control ability

Inactive Publication Date: 2009-11-11

BAOSTEEL ENG & TECH GRP

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Problems solved by technology

[0007] The task of the present invention is to provide a method and control device for controlling the temperature of the emulsion crude oil in a rolling mill, which solves the above problems in the prior art, es...

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Abstract

The invention relates to a method for controlling temperature of crude oil for emulsion of a rolling mill and a control device. The method comprises the steps of: arranging a heating device on the outer part of a crude oil tank; adopting a circulation heating pump arranged at the tail of the crude oil tank to transfer crude oil to a heat exchanger for heat exchange; simultaneously adopting a temperature controller on the crude oil tank to control the on and off of the heating device; and transferring crude oil to the top of the crude oil tank for outer circulation heating so as to keep the temperature of crude oil inside the crude oil tank at a preset value. A control device comprises the heating device consisting of the circulation heating pump and the heat exchanger, the temperature controller, a steam control valve, a steam trap and pipelines connecting the components, wherein the circulation heating pump is arranged at the tail of the crude oil tank, the heat exchanger is arranged on the side of the crude oil tank and the temperature controller is arranged on the crude oil tank. The invention has the advantages of good heating effect, equal crude oil temperature, high temperature-control property and precision, simple and convenient operation process, non-steam entering the crude oil and non-impact on crude oil quality.

Application Domain

Tank wagons

Technology Topic

EmulsionProcess engineering +7

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Examples

Experimental program(1)

Example Embodiment

[0039] The preferred embodiments of the rolling mill emulsion crude oil temperature control method and control device of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] The manufacturer transports the crude oil to the site by tank truck, and uses the unloading pump to suck the crude oil from the tank truck into the crude oil tank through the hose. The crude oil tank plays a role in storage and transit, and is generally stored for one month. The pH value of crude oil is 4.0-7.0, and the density is ρ=0.95kg/L. If the crude oil temperature is too low, it is generally easy to solidify below 30°C. If the crude oil temperature is too high, it will cause bacteria to grow and deteriorate. Therefore, it must Control the crude oil within a certain temperature range.

[0041] See figure 1 According to the temperature control method of the rolling mill emulsion crude oil of the present invention, the following steps are taken:

[0042] A heating device is installed outside the crude oil tank 1, and the crude oil is sent to the heat exchanger 3 through the circulating heat pump 2 at the end of the crude oil tank for heat exchange. At the same time, the temperature controller 4 on the crude oil tank controls the startup and shutdown of the heating device. Then the crude oil is sent to the top of the crude oil tank for extracorporeal circulation heating to control the temperature of the crude oil in the crude oil tank to maintain the set value. The upper limit value of the set value of the crude oil temperature in the crude oil tank 1 is 45°C, and the lower limit value is 30°C.

[0043] Emulsion is passed into the coil of heat exchanger 3, and steam is passed between the shell of the heat exchanger and the outer wall of the coil. The steam is 160℃~170℃ saturated steam. The steam pressure is 0.4~0.6MPa.

[0044] See figure 2 , A rolling mill emulsion crude oil temperature control device of the present invention is connected to the crude oil tank 1. The control device is mainly composed of a heating device, a temperature controller 4, a steam control valve 5, a steam trap 6 and a pipeline connected between them Composition, the heating device is composed of a circulating heat pump 2 and a heat exchanger 3.

[0045] The circulating heat pump 2 is arranged at the tail of the crude oil tank 1, the circulating heat pump 2 is connected to the crude oil tank 1 through a pipeline, and the circulating heat pump 2 is connected to the heat exchanger 3 through another pipeline. Circulating heating pump 2 can be a horizontal screw pump, and its capacity is: Q=20m 3 /h, P=0.15MPa.

[0046] The heat exchanger 3 is arranged on the side of the crude oil tank 1, and the heat exchanger 3 is connected to the top of the crude oil tank 1 through a pipe. The heat exchanger 3 is composed of a shell, heads at both ends of the shell, and several coils. The coils are arranged inside the shell, and the coils are connected to the circulating heat pump 2; the coils are also connected to the steam inlet pipe to form heat exchange. The heat exchanger 3 is a cylindrical horizontal structure, made of stainless steel, and its two ends are heads. The material of the shell, head and connecting pipe of the heat exchanger 3 is 304 type stainless steel, the material of the stainless steel coil inside the heat exchanger 3 is type 316L stainless steel, and the material of the sealing ring is fluorine rubber. The capacity of heat exchanger 3 is: Q=210m 3 /h, Δt=5°C. The space between the shell of the heat exchanger 3 and the outer wall of the coil is connected to the steam inlet pipe. The emulsion is passed into the coil, and the steam is passed into the shell and outside the coil.

[0047] The temperature controller 4 is installed on the crude oil tank 1 to control the temperature of the crude oil in the crude oil tank.

[0048] The steam control valve 5 is installed on the steam inlet pipe of the heat exchanger 3. The steam trap 6 is installed on the steam condensate discharge pipe of the heat exchanger 3.

[0049] The working process of the rolling mill emulsion crude oil temperature control device of the present invention is as follows:

[0050] The crude oil is connected to the circulating heat pump 2 through the carbon steel pipe and manual valve from the liquid outlet at the bottom of the crude oil tank 1. After the crude oil is pressurized, it enters the heat exchanger 3 through the pipe and valve, and steam is introduced into the side interface of the heat exchanger 3. At the bottom of the heat exchanger 3 is provided a steam condensed water outlet. During the heating process, the steam control valve 5 on the steam inlet pipe is controlled by the emulsion temperature controller 4 provided on the crude oil tank 1. When the temperature of the crude oil on the crude oil tank 1 is lower than 30°C, the on the steam pipe is automatically opened. The steam control valve 5 automatically closes the steam control valve 5 on the steam pipeline when the temperature of the crude oil on the crude oil tank 1 reaches 45°C, so as to achieve the purpose of automatic temperature control. A steam trap 6 provided on the steam condensate discharge port at the bottom of the heat exchanger 3 automatically discharges the steam condensate. The system pipelines outside the equipment are all made of seamless steel pipes, the connection between the pipelines is welded, and the connection between the pipeline and the equipment is flanged, and metal spiral wound gaskets are used.

[0051] Of course, those of ordinary skill in the art should realize that the above-mentioned embodiments are only used to illustrate the present invention, but not to limit the present invention. As long as they are within the essential spirit of the present invention, the above-mentioned embodiments are changed. All the variants will fall within the scope of the claims of the present invention.

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Easy maintenance
Good heating effect

Method for controlling temperature of crude oil for emulsion of rolling mill and control device

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

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Description & Claims & Application Information

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