An energy-saving utilization system of delayed coking unit

A delayed coking and venting tower technology, applied in the field of energy utilization, can solve the problems of low attention, large water consumption, and poor utilization of heat energy, etc., and achieve the effects of reliable technology, high energy consumption, and easy implementation

Active Publication Date: 2019-02-12
BEIJING HUAFU ENG
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  • Summary
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AI Technical Summary

Problems solved by technology

[0004] However, in PetroChina, Sinopec and local refineries, the energy utilization of the vent tower system in the delayed coking unit has not been paid much attention. For the large amount of heat carried by the bottom oil of the vent tower system, circulating water is used as cooling medium, consumes a lot of water, and the heat energy is not well utilized

Method used

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specific Embodiment approach

[0018] The energy-saving utilization system of the delayed coking unit of the present invention, its preferred specific embodiment is:

[0019] Including a vent tower, a steam generator is arranged at the bottom of the vent tower, a heat exchange tube is arranged in the steam generator, and the bottom oil of the vent tower is connected to the heat exchange tube through a bottom pump, The casing of the steam generator is provided with a medium water inlet and a steam outlet.

[0020] The steam outlet is connected to the steam pipe network of the whole plant.

[0021] The medium water is deoxygenated water.

[0022] The liquid level is controlled by three parameters: dual liquid level ratio selection, steam flow rate and feed water flow rate.

[0023] The energy-saving utilization system of the delayed coking unit of the present invention solves the problem of high energy consumption of the vent tower system in the existing device, and at the same time by-produces high value-a...

specific Embodiment

[0027] Such as figure 1 , figure 2 As shown, in a delayed coking production unit, the bottom oil of the vent tower is discharged from the bottom pump 2 of the vent tower, and enters the steam generator at the bottom of the vent tower through the N1 nozzle, and the deoxygenated water enters the steam generator from the N3 nozzle at the bottom of the shell side After heat exchange between the two, the cooled bottom oil of the vent tower comes out through the N2 nozzle and is divided into two parts: one part is returned to the top of the vent tower 1 as reflux, and the oil and gas in the cooling tower are recovered to the maximum extent. The oil in it; part of it is out of bounds as the bottom product. The deoxygenated water absorbs a large amount of heat and is gasified to generate 1.0MPa saturated steam, which exits the steam generator through the N4 nozzle and enters the steam pipe network of the whole plant for use by equipment and users.

[0028] The steam generator is al...

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Abstract

The invention discloses an energy-saving utilization system of a delay coking unit, comprising an empty tower, wherein the tower bottom of the empty tower is provided with a steam generator; a heat exchange pipe is arranged in the steam generator, and the tower bottom oil of the empty tower is connected with the heat exchange pipe through the tower bottom pump, and the heat exchange pipe is provided with a medium water inlet and a steam outlet; the steam outlet is connected with a steam pipe network in the whole factory. The energy-saving utilization system solves the problem of high energy consumption of the empty tower system in the existed device; meanwhile, the system also produces the steam with high additional value. The technology is reliable, reasonable, high-efficient and easy to practice; the tracing heat of the device and the pipeline in the steam supply device and use of other devices can be happened, the materials (products) are cooled; thus the purpose of recycling oil product is reached.

Description

technical field [0001] The invention relates to an energy utilization technology of a vent tower system in a delayed coking device, in particular to an energy-saving utilization system of a delayed coking unit. Background technique [0002] Delayed coking unit is a thermal processing technology of heavy oil, and it is a main means of lightening heavy oil in refineries and increasing the yield of light oil in refineries. The delayed coking process usually uses heavy oil, residual oil, or even asphalt as raw materials, and undergoes deep thermal cracking and condensation reactions at high temperatures (about 500°C) to produce rich gas, naphtha, diesel, wax oil, and coke. It is one of the main methods of deep processing of residual oil in the world, and its processing capacity accounts for one-third of the residual oil processing capacity. [0003] The so-called delay means that the coking oil is rapidly heated to the coking reaction temperature through the heating furnace, bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/00F22B1/16
CPCC10G9/005C10G2300/4081F22B1/16
Inventor 张彩霞肖茂金
Owner BEIJING HUAFU ENG
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