阅读说明：本技术 一种上升管换热器出口荒煤气温度控制方法 (Method for controlling temperature of crude gas at outlet of ascending pipe heat exchanger ) 是由 王跃欣 张宝会 孔德文 王玉艳 汪顶 马云鹏 李庭云 于 2021-08-27 设计创作，主要内容包括：本发明涉及一种上升管换热器出口荒煤气温度控制方法,属于焦化工艺方法技术领域。本发明的技术方案是：将一座焦炉的所有上升管换热器按照出焦串序的顺序对其进行编组,在每组上升管换热器供水主管上设置自动调节阀,并与该组上升管换热器出口荒煤气温度控制点进行联锁控制。本发明的有益效果是：通过按焦炉出焦串序编组的方法,由于同一编组内的上升管换热器工况相近,简化了控制程序算法,控制程序更为有效,只需按照结焦周期分时段分别进行联锁控制,就能够解决结焦中后期荒煤气出口温度偏低、上升管内壁挂结石墨、焦油、出焦时上升管冒黑烟等的问题。(The invention relates to a method for controlling the temperature of raw coke oven gas at an outlet of a rising pipe heat exchanger, and belongs to the technical field of coking process methods. The technical scheme of the invention is as follows: all riser heat exchangers of a coke oven are grouped according to the sequence of coke discharging and stringing, an automatic regulating valve is arranged on a main water supply pipe of each group of riser heat exchangers, and the automatic regulating valve and a temperature control point of crude gas at the outlet of the group of riser heat exchangers are subjected to interlocking control. The invention has the beneficial effects that: according to the method for marshalling according to the coke discharging series sequence of the coke oven, because the working conditions of the ascending pipe heat exchangers in the same marshalling are similar, the control program algorithm is simplified, the control program is more effective, and the problems that the temperature of the outlet of the crude gas is low in the middle and later periods of coking, the graphite and the tar are hung on the inner wall of the ascending pipe, the ascending pipe emits black smoke during coke discharging and the like can be solved only by respectively carrying out interlocking control in time intervals according to the coking cycle.)

1. A method for controlling the temperature of raw coke oven gas at an outlet of an ascending pipe heat exchanger is characterized by comprising the following steps: all riser heat exchangers of a coke oven are grouped according to the sequence of coke discharging and stringing, an automatic regulating valve is arranged on a main water supply pipe of each group of riser heat exchangers, and the automatic regulating valve and a temperature control point of crude gas at the outlet of the group of riser heat exchangers are subjected to interlocking control.

2. The method for controlling the temperature of the raw gas at the outlet of the ascending tube heat exchanger according to claim 1, wherein the method comprises the following steps: the coke discharging sequence refers to the discharging sequence of each carbonization chamber of the coke oven, and comprises a 2-1 sequence and a 5-2 sequence.

3. The method for controlling the temperature of the raw gas at the outlet of the ascending tube heat exchanger according to claim 1, wherein the method comprises the following steps: the grouping refers to grouping 3-5 riser heat exchangers with similar production working conditions in the same series according to the coke discharging series of the coke oven, wherein the coking time difference is 20-60 minutes, and all riser heat exchangers of the coke oven are grouped.

4. The method for controlling the temperature of the raw gas at the outlet of the ascending tube heat exchanger according to claim 1, wherein the method comprises the following steps: the ascending pipe heat exchangers are provided with a main water supply pipe, each group of ascending pipe heat exchangers is provided with a main water supply pipe, one end of each main water supply pipe is connected with a main water supply pipe, the other end of each main water supply pipe is connected with a branch water supply pipe, and the branch water supply pipes are provided with manual valves for controlling the water amount of the corresponding ascending pipe heat exchangers.

5. The method for controlling the temperature of the raw gas at the outlet of the ascending tube heat exchanger according to claim 1, wherein the method comprises the following steps: the water quantity of each grouped riser heat exchanger and the temperature of the raw coke oven gas at the outlet of the group of riser heat exchangers are subjected to interlocking control, and the value of the temperature of the raw coke oven gas at the outlet of the group of riser heat exchangers changes along with different working conditions of the group of carbonization chambers.

6. The method for controlling the temperature of the raw gas at the outlet of the ascending tube heat exchanger according to claim 5, wherein the method comprises the following steps: the working condition of the carbonization chamber is divided into two working conditions, wherein the first working condition refers to that all furnace numbers in the same marshalling are in a coking working condition, the average value of the temperature of the raw gas at the outlet of the heat exchangers of the furnace number ascension pipes in the marshalling is subjected to interlocking control with a water supply regulating valve, and the judgment basis is that all the ascension pipe covers in the marshalling are in a closed state; the second working condition refers to the working condition that any one or more furnace numbers in the same marshalling are in coke discharging or coal charging operation, the linkage control is carried out according to the highest temperature value of the raw coke oven gas at the outlet of the ascending tube heat exchanger in the marshalling, and the judgment basis is that one or more furnace number ascending tube covers in the marshalling are all in an open state.

7. The method for controlling the temperature of the raw gas at the outlet of the ascending tube heat exchanger according to claim 6, wherein the method comprises the following steps: the working modes of the two working conditions are automatic switching, and the switching signal is the opening of any ascending pipe cover or the closing of all the ascending pipe covers in the marshalling.

Technical Field

The invention relates to a method for controlling the temperature of raw coke oven gas at an outlet of a rising pipe heat exchanger, and belongs to the technical field of coking process methods.

Background

Under the situation of carbon neutralization and carbon peak reaching, energy saving, consumption reduction and waste heat recovery projects are more and more emphasized by various coking enterprises. At present, newly-built coking enterprises generally adopt a riser waste heat utilization technology, and some enterprises also reform the riser of the original coke oven and adopt the technology to recover waste heat resources. However, the temperature of the raw gas at the outlet of the riser heat exchanger is controlled more coarsely, the raw gas is divided into 5-6 groups according to the furnace number, a field manual valve is arranged on each water supply pipeline, accurate regulation and control cannot be realized, and the problems that the temperature of the raw gas at the middle and later coking stages is low, graphite and tar are hung on the inner wall of the riser, black smoke is emitted from the riser during coke discharging and the like can be caused.

Disclosure of Invention

The invention aims to provide a method for controlling the temperature of raw coke oven gas at the outlet of an ascending tube heat exchanger, which is a method for marshalling according to the coke discharging sequence of a coke oven, simplifies the control program algorithm because the working conditions of the ascending tube heat exchangers in the same marshalling are similar, the control program is more effective, the problems of low temperature of the raw coke oven gas outlet at the middle and later stages of coking, graphite and tar hanging on the inner wall of the ascending tube, black smoke of the ascending tube during coke discharging and the like can be solved only by respectively carrying out interlocking control according to the coking cycle in different time periods, and the problems in the background technology are effectively solved.

The technical scheme of the invention is as follows: a method for controlling the temperature of raw coke oven gas at an outlet of an ascending pipe heat exchanger comprises the following steps: all riser heat exchangers of a coke oven are grouped according to the sequence of coke discharging and stringing, an automatic regulating valve is arranged on a main water supply pipe of each group of riser heat exchangers, and the automatic regulating valve and a temperature control point of crude gas at the outlet of the group of riser heat exchangers are subjected to interlocking control.

The coke discharging sequence refers to the discharging sequence of each carbonization chamber of the coke oven, and comprises a 2-1 sequence and a 5-2 sequence.

The grouping refers to grouping 3-5 riser heat exchangers with similar production working conditions in the same series according to the coke discharging series of the coke oven, wherein the coking time difference is 20-60 minutes, and all riser heat exchangers of the coke oven are grouped.

The ascending pipe heat exchangers are provided with a main water supply pipe, each group of ascending pipe heat exchangers is provided with a main water supply pipe, one end of each main water supply pipe is connected with a main water supply pipe, the other end of each main water supply pipe is connected with a branch water supply pipe, and the branch water supply pipes are provided with manual valves for controlling the water amount of the corresponding ascending pipe heat exchangers.

The water quantity of each grouped riser heat exchanger and the temperature of the raw coke oven gas at the outlet of the group of riser heat exchangers are subjected to interlocking control, and the value of the temperature of the raw coke oven gas at the outlet of the group of riser heat exchangers changes along with different working conditions of the group of carbonization chambers.

The working condition of the carbonization chamber is divided into two working conditions, wherein the first working condition refers to that all furnace numbers in the same marshalling are in a coking working condition, the average value of the temperature of the raw gas at the outlet of the heat exchangers of the furnace number ascension pipes in the marshalling is subjected to interlocking control with a water supply regulating valve, and the judgment basis is that all the ascension pipe covers in the marshalling are in a closed state; the second working condition refers to the working condition that any one or more furnace numbers in the same marshalling are in coke discharging or coal charging operation, the linkage control is carried out according to the highest temperature value of the raw coke oven gas at the outlet of the ascending tube heat exchanger in the marshalling, and the judgment basis is that one or more furnace number ascending tube covers in the marshalling are all in an open state.

The working modes of the two working conditions are automatic switching, and the switching signal is the opening of any ascending pipe cover or the closing of all the ascending pipe covers in the marshalling.

The invention has the beneficial effects that: according to the method for marshalling according to the coke discharging series sequence of the coke oven, because the working conditions of the ascending pipe heat exchangers in the same marshalling are similar, the control program algorithm is simplified, the control program is more effective, and the problems that the temperature of the outlet of the crude gas is low in the middle and later periods of coking, the graphite and the tar are hung on the inner wall of the ascending pipe, the ascending pipe emits black smoke during coke discharging and the like can be solved only by respectively carrying out interlocking control in time intervals according to the coking cycle.

Drawings

FIG. 1 is a control system diagram of a serial sequence according to embodiment 2-1 of the present invention;

in the figure: the automatic control system comprises a water supply main pipe 1, an automatic control valve 2, a manual valve 3, a 1# ascending pipe heat exchanger 4, a 2# ascending pipe heat exchanger 5, a 3# ascending pipe heat exchanger 6, a 4# ascending pipe heat exchanger 7, a 5# ascending pipe heat exchanger 8, a 6# ascending pipe heat exchanger 9, a 7# ascending pipe heat exchanger 10, an 8# ascending pipe heat exchanger 11, a 9# ascending pipe heat exchanger 12, a 10# ascending pipe heat exchanger 13, an 11# ascending pipe heat exchanger 14, a 12# ascending pipe heat exchanger 15 and steam 16.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

A method for controlling the temperature of raw coke oven gas at an outlet of an ascending pipe heat exchanger comprises the following steps: all riser heat exchangers of a coke oven are grouped according to the sequence of coke discharging and stringing, an automatic regulating valve is arranged on a main water supply pipe of each group of riser heat exchangers, and the automatic regulating valve and a temperature control point of crude gas at the outlet of the group of riser heat exchangers are subjected to interlocking control.

The coke discharging sequence refers to the discharging sequence of each carbonization chamber of the coke oven, and comprises a 2-1 sequence and a 5-2 sequence.

The grouping refers to grouping 3-5 riser heat exchangers with similar production working conditions in the same series according to the coke discharging series of the coke oven, wherein the coking time difference is 20-60 minutes, and all riser heat exchangers of the coke oven are grouped.

The ascending pipe heat exchangers are provided with a main water supply pipe, each group of ascending pipe heat exchangers is provided with a main water supply pipe, one end of each main water supply pipe is connected with a main water supply pipe, the other end of each main water supply pipe is connected with a branch water supply pipe, and the branch water supply pipes are provided with manual valves for controlling the water amount of the corresponding ascending pipe heat exchangers.

The water quantity of each grouped riser heat exchanger and the temperature of the raw coke oven gas at the outlet of the group of riser heat exchangers are subjected to interlocking control, and the value of the temperature of the raw coke oven gas at the outlet of the group of riser heat exchangers changes along with different working conditions of the group of carbonization chambers.

The working condition of the carbonization chamber is divided into two working conditions, wherein the first working condition refers to that all furnace numbers in the same marshalling are in a coking working condition, the average value of the temperature of the raw gas at the outlet of the heat exchangers of the furnace number ascension pipes in the marshalling is subjected to interlocking control with a water supply regulating valve, and the judgment basis is that all the ascension pipe covers in the marshalling are in a closed state; the second working condition refers to the working condition that any one or more furnace numbers in the same marshalling are in coke discharging or coal charging operation, the linkage control is carried out according to the highest temperature value of the raw coke oven gas at the outlet of the ascending tube heat exchanger in the marshalling, and the judgment basis is that one or more furnace number ascending tube covers in the marshalling are all in an open state.

The working modes of the two working conditions are automatic switching, and the switching signal is the opening of any ascending pipe cover or the closing of all the ascending pipe covers in the marshalling.

Example (b):

taking a 60-hole coke oven and a 2-1 series as an example, as shown in figure 1, the steps are as follows:

the first step is as follows: grouping is carried out on the ascending tube heat exchangers, and according to a 2-1 series sequence, 3 ascending tube heat exchangers are grouped into one group, and 20 groups are provided in total.

The second step is that: each heat exchanger group is supplied with water by a main water supply pipe, an automatic regulating valve F1, F2 and F3 … … F20 are arranged, and a manual valve is arranged on a water supply branch pipe of each ascending pipe heat exchanger to regulate the water supply amount of the corresponding ascending pipe heat exchanger.

The third step: the automatic regulating valves F1, F2 and F3 … … F20 of each group are respectively interlocked with the crude gas outlet temperatures T1, T2 and T3 … … T20 of the corresponding group, so that automatic regulation is realized.

The fourth step: the values of T1, T2 and T3 … … T20 are as follows according to the working condition of each group of furnace numbers: (1) the average value of the raw gas temperatures at the outlet of riser heat exchangers of all furnace numbers in the same marshalling is taken when all the furnace numbers are in the coking working condition, namely the average values of T1, T2 and T3 … … T20 of the raw gas temperatures at the outlet of the riser heat exchangers of all the furnace numbers in the marshalling, T1, T2 and T3, the average values of T4, T5 and T6, and the average values of T7, T8 and T9 of … … T58, T59 and T60 are respectively taken. (2) When any one or more furnace numbers in the same grouping are in coke discharging or coal charging operation conditions, the highest values of T1, T2 and T3, the highest values of T4, T5 and T6, the highest values of T7, T8 and T9, and the highest values of … … T58, T59 and T60 of the outlet raw gas temperature of the riser heat exchanger in the grouping are respectively taken according to the highest values of the outlet raw gas temperature of the riser heat exchanger, namely T1, T2 and T3 … … T20.

The fifth step: two working conditions of the raw coke oven gas temperature control point at the outlet of each group of ascending tube heat exchangers are automatically switched, and the switching signal is the opening of any ascending tube cover or the closing of all ascending tube covers in the grouping.

After the implementation, because the working conditions of the ascending pipes in the same grouping are similar, the temperature of the raw gas at the outlet of the heat exchanger is stable, the water quantity of the ascending pipe heat exchanger is stably regulated, and the problems that graphite and tar are hung on the inner wall of the ascending pipe, black smoke is emitted by the ascending pipe during the coke discharging and the like caused by low temperature of the raw gas in the middle and later coking periods are solved.