CN217351259U

CN217351259U - Coke drum energy-saving device for delayed coking device

Info

Publication number: CN217351259U
Application number: CN202123253005.XU
Authority: CN
Inventors: 唐金明; 谢加令; 刘忠科; 田超; 辛鲁; 司讷; 王凡
Original assignee: China Overseas Energy Technology Shandong Co ltd
Current assignee: China Overseas Energy Technology Shandong Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-09-02
Anticipated expiration: 2031-12-22

Abstract

The utility model provides a coke tower energy-saving device for a delayed coking device, which belongs to the technical field of petrochemical industry and comprises a coke tower, wherein a steam input pipeline is communicated on the coke tower and can convey steam into the coke tower; the steam branch pipeline is connected in parallel between the input end and the output end of the steam input pipeline, a first flow meter, a first control valve group and an atomizer are sequentially arranged on the steam branch pipeline according to the steam flow direction, and the input end of the atomizer is communicated with a liquid water input pipeline. The beneficial effects of the utility model reside in that, it can replace partial steam through liquid water at big steam blowing in-process, reduces the consumption of big steam blowing in-process steam.

Description

Coke tower energy-saving device for delayed coking device

Technical Field

The utility model belongs to the technical field of petrochemical, concretely relates to coke tower economizer for delayed coking device.

Background

Delayed coking is one of the important production processes in oil refining and chemical industry. Specifically, delayed coking refers to a process in which residual oil in an oil refining process is heated by a heating furnace and then rapidly transferred into a coke drum, so that the residual oil is pyrolyzed in the coke drum to produce light oil and petroleum coke.

The coke tower is used as core process equipment for delayed coking, and has the operation characteristics of alternate cold and hot circulation, wherein the temperature circulation process in the tower at each period is as follows: 1. sending residual oil heated to about 495 ℃ by a heating furnace into a coke tower from the bottom of the tower for coking reaction to generate petroleum coke; 2. performing a coke cooling process, and cooling the generated petroleum coke from about 430 ℃ to about 90 ℃; 3. opening the top cover unit, introducing high-pressure water into the coke tower, and performing water-cooling decoking; 4. after the decoking is finished, after the processes of steam pressure test, oil gas preheating and the like, high-temperature residual oil at 495 ℃ at the outlet of the heating furnace is sent into a coke tower for coking reaction, so that a production period is completed, and the production period is operated circularly.

Wherein, the coke cooling process comprises the following steps: small steam blowing, large steam blowing, small water supply and large water supply. In the traditional process, the small steam blowing and the large steam blowing generally use system steam as a cooling medium to cool residual oil in a coke tower from about 430 ℃ to about 360 ℃, wherein the small steam blowing time is 1 hour and 40 minutes, the large steam blowing time is 2 hours, and the large steam blowing amount is 15t/h steam when the coke tower is cooled, so that the whole coke cooling process can generate great steam consumption cost, and even great fluctuation can be generated on a steam pipe network of the whole factory.

Disclosure of Invention

The technical problem solved by the utility model is to provide a coke tower energy-saving device for delayed coking device that can reduce the steam consumption in the big steam blowing process.

In order to solve the technical problem, the utility model provides a following technical scheme: a coke drum energy-saving device for a delayed coking device comprises a coke drum, wherein a steam input pipeline is communicated with the coke drum and can convey steam into the coke drum; the steam branch pipeline is connected in parallel between the input end and the output end of the steam input pipeline, a first flow meter, a first control valve group and an atomizer are sequentially arranged on the steam branch pipeline according to the steam flow direction, and the input end of the atomizer is communicated with a liquid water input pipeline. Therefore, in the process of large steam blowing, partial steam can be replaced by partial liquid water, and the consumption of the steam in the process of large steam blowing is reduced.

Furthermore, a second flow meter and a second control valve group are sequentially arranged on the liquid water input pipeline along the liquid water flow direction, so that the flow of the liquid water input pipeline can be monitored in real time through the second flow meter, and the flow of the liquid water input pipeline can be controlled through the second control valve group.

Furthermore, the liquid water input pipeline is communicated with a liquid water branch pipeline, the liquid water branch pipeline is communicated with the coke cooling pool, and the liquid water branch pipeline is provided with a third control valve group, so that the liquid water branch pipeline can be applied in winter, and the liquid water input pipeline is prevented from being frozen through the residual temperature of the coke cooling pool.

The system further comprises a spray control center, wherein the spray control center is in communication connection with the first flow meter, the first control valve group, the second flow meter and the second control valve group; the first flowmeter transmits a signal to a spray control center after monitoring the flow of steam in the steam branch pipeline, and the spray control center controls a first control valve group to adjust the flow rate of the steam branch pipeline after receiving the signal transmitted by the first flowmeter; the second flow meter transmits a signal to the spray control center after monitoring the flow of liquid water in the liquid water input pipeline, and the spray control center controls the second control valve group to adjust the flow of the liquid water input pipeline after receiving the signal transmitted by the second flow meter, so that the specific gravity of liquid in a vapor-liquid mixture output by the atomizer can be adjusted, and the occurrence of a coke explosion phenomenon or a tower blockage accident is avoided.

Further, the liquid water conveyed in the liquid water input pipeline is deoxygenated water or condensed water, and the deoxygenated water or the condensed water is used for replacing steam.

Furthermore, the first flowmeter is an orifice plate flowmeter, so that the first flowmeter is convenient to maintain and replace.

Furthermore, the second flowmeter is a pore plate flowmeter, so that the second flowmeter is convenient to maintain and replace.

According to the technical scheme, the utility model has the advantages of it is following: firstly, the utility model adopts the deaerated water or the condensed water to replace part of steam, thereby reducing the consumption of the steam in the large steam blowing process; secondly, the utility model discloses when inputing the mixture in to the coke drum, the utility model discloses earlier through the atomizer with the minimum liquid droplet water of liquid water atomization for the micron order, in the mixture input coke drum that obtains after mixing vapor-liquid mixture after will atomizing again with the steam secondary to make tower wall temperature variation relax, the thermal stress influence reduces, and then prolongs the life of coke drum.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: 1. the system comprises a coking oil input pipeline, 2, an atomizer, 3, a steam input pipeline, 4, a first control valve group, 5, a first flowmeter, 6, a steam branch pipeline, 7, a cold coke pool, 8, a third control valve group, 9, a second control valve group, 10, a liquid water input pipeline, 11, a second flowmeter, 12, a coke tower, 13 and a spray control center.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a coke tower economizer for delayed coking device, it includes coke drum 12 and spraying control center 13, the intercommunication has coking oil input pipeline 1 on the coke drum 12, coking oil input pipeline 1 can carry the coking oil about 495 ℃ to coke drum 12 in, it has steam input pipeline 3 still to communicate on the coke drum 12, steam input pipeline 3 can be to carrying steam in the coke drum 12, just the steam of carrying in the steam input pipeline 3 preferably adopts low pressure steam.

A steam branch pipeline 6 is connected in parallel between the input end and the output end of the steam input pipeline 3, and a flow meter I5, a control valve group I4 and the atomizer 2 are sequentially arranged on the steam branch pipeline 6 according to the steam flow direction. The first flow meter 5 is used for monitoring the flow of the steam in the steam branch pipeline 6 in real time, and the first flow meter 5 preferably adopts a pore plate flow meter; the control valve group 4 is used for controlling the flow of the steam branch pipeline 6. And the first flow meter 5 and the first control valve group 4 are in communication connection with the spray control center 13, that is, the first flow meter 5 can transmit a signal to the spray control center 13 after monitoring the flow of the steam in the steam branch pipeline 6, and the spray control center 13 can control the first control valve group 4 to adjust the flow of the steam branch pipeline 6 after receiving the signal transmitted by the first flow meter 5, so as to change the flow of the steam flowing into the atomizer 2.

The input end of the atomizer 2 is also communicated with a liquid water input pipeline 10, and the liquid conveyed in the liquid water input pipeline 10 is preferably deoxygenated water or condensed water. A second flowmeter 11 and a second control valve group 9 are sequentially arranged on the liquid water input pipeline 10 along the liquid water flow direction, wherein the second flowmeter 11 is used for monitoring the flow of the liquid water in the liquid water input pipeline 10 in real time, a pore plate flowmeter is preferably adopted by the second flowmeter 11, and the second control valve group 9 is used for controlling the flow rate of the liquid water input pipeline 10. And the second flowmeter 11 and the second control valve group 9 are in communication connection with the spray control center 13, namely, the second flowmeter 11 can transmit a signal to the spray control center 13 after monitoring the flow of liquid water in the liquid water input pipeline 10, and the spray control center 13 can control the second control valve group 9 to adjust the flow of the liquid water input pipeline 10 after receiving the signal transmitted by the second flowmeter 11, so that the flow of the liquid water flowing into the atomizer 2 is changed, the specific gravity of the liquid in the vapor-liquid mixture output by the atomizer 2 is further adjusted, and the occurrence of coke explosion or tower blockage accidents is avoided.

Furthermore, as preferred, the utility model discloses the intercommunication has liquid water branch pipeline on the liquid water input pipeline 10, liquid water branch pipeline intercommunication cold burnt pond 7, just be provided with three 8 of valve unit on the liquid water branch pipeline, moreover liquid water branch pipeline is preferred to be set up be close to the one end of atomizer 2 on the liquid water input pipeline 10, the residual heat of accessible cold burnt pond 7 prevents that liquid water input pipeline 10 from being congealed winter.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coke drum energy-saving device for a delayed coking device is characterized by comprising a coke drum, wherein a steam input pipeline is communicated with the coke drum and can convey steam into the coke drum; the steam branch pipeline that has parallelly connected between steam input pipeline's the input and the output, steam branch pipeline has set gradually flowmeter one, valve unit one and atomizer according to the steam flow direction on the road, the input intercommunication of atomizer has liquid water input pipeline, liquid water input pipeline intercommunication has liquid water branch pipeline on the road, liquid water branch pipeline intercommunication cold coke pool, just liquid water branch pipeline is provided with valve unit three on the road.

2. The coke drum economizer for a delayed coking unit according to claim 1, wherein a second flow meter and a second control valve group are sequentially arranged on the liquid water input pipeline along the liquid water flow direction.

3. The coke drum economizer for a delayed coker of claim 2, further comprising a spray control center communicatively coupled to the first flow meter, the first set of control valves, the second flow meter, and the second set of control valves.

4. The coke drum economizer for a delayed coker of claim 3, wherein the liquid water being transported in the liquid water input line is deoxygenated water or condensed water.

5. The coke drum economizer for a delayed coker of claim 3 or 4, wherein the first flow meter is an orifice plate flow meter.

6. The coke drum economizer for a delayed coker of claim 3 or 4, wherein the second flow meter is an orifice plate flow meter.