Parallel off-line crude oil preheater

Abstract

The invention provides a parallel off-line crude oil preheater, which comprises an on-line crude oil preheater, wherein one end of the on-line crude oil preheater is connected with a crude oil inlet pipe and a hot oil outlet pipe correspondingly, and the other end of the on-line crude oil preheater is connected with a heat exchanger; and a water gun is arranged at an inlet of the on-line crude oilpreheater. The parallel off-line crude oil preheater is mainly technically characterized in that the crude oil inlet pipe of the on-line crude oil preheater is connected with the off-line crude oil preheater in parallel. In order to solve the problem of unstable oil temperature at present, the off-line crude oil preheater is connected in parallel on the basis of the original on-line crude oil preheater, and crude oil is shunted, passes through residual steam in advance to heat part of raw oil, and then enters the on-line crude oil preheater together with the other part of the crude oil, so that the requirement of oil temperature control is met; and because the steam pressure is stable, the temperature fluctuation of the crude oil is small and can be controlled within + / -3 DEG C, and the temperature of the crude oil is controlled in a better control range, so that the aims of improving the yield, reducing the consumption and reducing the using amount of screen residues and additives are achieved.

Description

technical field [0001] The invention relates to the field of carbon black production, in particular to the transformation of equipment for controlling the temperature of crude oil into a furnace. Background technique [0002] In the production of carbon black, the temperature of crude oil into the furnace is an important process parameter, which has a great influence on product yield, crude oil atomization effect, product quality, additive dosage, etc. At present, the temperature control of crude oil into the furnace is completed in the form of online crude oil preheater, series online crude oil preheater, or installing a water gun at the inlet of the crude oil preheater, but this method has the following defects: 1) The temperature of crude oil into the furnace is not high. Stable, fluctuating with the fluctuation of system parameters, and this kind of system fluctuation is difficult to control, resulting in product quality fluctuations, 2) A single online preheater, after ...

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Problems solved by technology

At present, the temperature control of crude oil into the furnace is completed in the form of online crude oil preheater, series online crude oil preheater, or installing a water gun at the inlet of the crude oil preheater, but this method has the following defects: 1) The temperature of crude oil into the furnace is not high. Stable, fluctuating with the fluctuation of system parameters, and this kind of system fluctuation is difficult to control, resulting in product quality fluctuations, 2) A single online preheater, after a period of use, the crude oil preheating effect is not good, and the crude oil entering the furnace temperature Low; series online crude oil preheater or add water gun, often the temperature of crude oil is too high, at this time, the temperature adjustment of crude oil into the furnace is realized by adjusting the flow of crude oil, but the flow of crude oil into the furnace is strictly controlled, so it is necessary to adjust the return flow of crude oil To control the temperature of the crude oil entering the furnace, this control method is often realized by sacrificing additional electric energy. 3) The crude oil is returned to the crude oil tank, which needs to be cooled in advance. The process control range of the oil tank temperature is <90 °C, otherwise there will be The temperature of the returned crude oil will be as high as 220°C, which requires a large amount of cooling water to cool down. 4) A large amount of crude oil is returned to the oil tank, which will disturb the crude oil in the oil tank and increase the oil temperature, which will cause a large amount of oil and gas to volatilize. Today, with increasingly stringent environmental protection requirements, the difficulty of oil and gas treatment in cylinders has undoubtedly been greatly increased.

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