阅读说明：本技术 一种用于焦炉PROven系统故障的修复方法 (Method for repairing failure of PROven system of coke oven ) 是由 *** 韩学祥 钱虎林 方亮青 张英 何谋龙 曹先中 刘彦 郑庭 邹发远 张增贵 于 2019-10-21 设计创作，主要内容包括：本发明公开了用于焦炉PROven系统故障的修复方法,具体为：步骤一：使发生故障的焦炉的炭化室至桥管处保持密闭状态；步骤二：将焦炉的桥管法兰处氨水支管阀门开度关小,将桥管上的其它氨水补充支路的阀门全部关闭；提升桥管内温度；步骤三：监测焦炉桥管表面温度,当桥管表面温度升至110～120℃时,进入下一操作步骤；步骤四：对阀位控制器进行手动校验；步骤五：将阀位控制器转换成自动校验；步骤六：用快速氨水对桥管内的固定杯、皇冠管、中心拉杆及溢流调节装置上融化的焦油进行快速冲洗；步骤七：桥管内氨水喷洒恢复正常；步骤八：将阀位控制器恢复成自动调节状态,整个检修工作结束；本发明不需要空炉打开桥管就能够安全、快速、高效地消除故障,使杯阀恢复正常调节。(The invention discloses a method for repairing a coke oven PROven system fault, which specifically comprises the following steps: the method comprises the following steps: keeping the carbonization chamber of the coke oven with failure to the bridge pipe in a closed state; step two: closing the opening of the ammonia water branch pipe valve at the bridge pipe flange of the coke oven, and completely closing the valves of other ammonia water supplement branches on the bridge pipe; raising the temperature in the bridge pipe; step three: monitoring the surface temperature of the bridge tube of the coke oven, and entering the next operation step when the surface temperature of the bridge tube is increased to 110-120 ℃; step four: manually checking the valve level controller; step five: converting the valve level controller into automatic calibration; step six: rapidly washing tar melted on a fixed cup, a crown pipe, a central pull rod and an overflow adjusting device in the bridge pipe by using rapid ammonia water; step seven: the ammonia water spraying in the bridge pipe is recovered to normal; step eight: the valve controller is restored to an automatic adjusting state, and the whole maintenance work is finished; the invention can safely, quickly and efficiently eliminate the fault without opening the bridge pipe by an empty furnace, so that the cup valve is restored to be normally adjusted.)

1. A method for repairing the failure of a PROven system of a coke oven is characterized by comprising the following steps: the method specifically comprises the following steps:

the method comprises the following steps: keeping the carbonization chamber of the coke oven with failure to the bridge pipe in a closed state;

step two: closing the opening of the ammonia water branch pipe valve at the bridge pipe flange of the coke oven, completely closing the valves of other ammonia water supplement branches on the bridge pipe, and reducing the total amount of ammonia water sprayed in the bridge pipe; raising the temperature in the bridge pipe;

step three: monitoring the surface temperature of the bridge tube of the coke oven, and entering the next operation step when the surface temperature of the bridge tube is increased to 110-120 ℃;

step four: manually checking the valve position controller, and adjusting the deviation of the valve position of a cup valve of the PROven system; monitoring the surface temperature of the bridge pipe in the check process of the valve controller, and keeping the surface temperature of the bridge pipe within the range of 110-120 ℃;

step five: converting the valve position controller into automatic calibration, and adjusting the deviation of the valve position of the cup valve of the PROven system; monitoring the surface temperature of the bridge pipe in the check process of the valve controller, and keeping the surface temperature of the bridge pipe within the range of 110-120 ℃;

step six: after the valve controller is checked, manually opening a quick ammonia water replenishing branch pipe pneumatic valve on the bridge pipe, simultaneously manually controlling the valve position of a cup valve to move up and down at 70-100%, and quickly washing tar melted on a fixed cup, a crown pipe, a central pull rod and an overflow adjusting device in the bridge pipe by using quick ammonia water;

step seven: after the quick flushing is finished, all the ammonia water branch pipe valves at the bridge pipe flange and valves of other ammonia water supplement branches are opened to a normal state, the ammonia water spraying in the bridge pipe is recovered to a normal state, and the temperature of the bridge pipe is also recovered to a normal state;

step eight: and (4) the valve level controller is restored to an automatic adjusting state, the whole maintenance work is finished, and the repair of the PROven system fault is realized.

2. The method of repairing coke oven PROven system failures of claim 1, wherein: and in the second step, the opening of the ammonia water branch pipe valve at the bridge pipe flange is reduced by 10%.

3. The method of repairing coke oven PROven system failures of claim 1, wherein: and in the third step, the fourth step and the fifth step, monitoring the surface temperature of the bridge pipe by using a point temperature gun.

4. The method of repairing coke oven PROven system failures of claim 1, wherein: in the fourth step, the valve position controller is manually checked, and the parameters to be adjusted are the zero point, the full scale and the linearity of the valve position of the cup valve of the PROven system; the deviations adjusted to "zero", "full" and "linear" are less than 3%.

5. The method of repairing coke oven PROven system failures of claim 1, wherein: in the fifth step, the valve position controller automatically checks, and the parameters to be adjusted are the zero point, the full scale and the linearity of the cup valve position of the PROven system; the deviations adjusted to "zero", "full" and "linear" are less than 3%.

6. The method of repairing coke oven PROven system failures of claim 1, wherein: in the fourth step, if the surface temperature of the bridge pipe exceeds 120 ℃, the fast ammonia water replenishing branch pipe valve is manually opened, the ammonia water is used for reducing the temperature, and the surface temperature of the bridge pipe is kept within the range of 110-120 ℃.

7. The method of repairing coke oven PROven system failures of claim 1, wherein: and in the fifth step, if the surface temperature of the bridge pipe exceeds 120 ℃, manually opening a valve of the quick ammonia water replenishing branch pipe, and reducing the temperature by using ammonia water to keep the surface temperature of the bridge pipe within the range of 110-120 ℃.

Technical Field

The invention relates to an overhauling technology of pressure adjusting equipment of a coking chamber of a coke oven, in particular to a repairing technology for a PROven system fault of the coke oven.

Background

The PROven system applied to the coke oven of 7.63m in China at present is a new technology for controlling the pressure single-hole regulation of the coking chamber during the coal charging operation and the coking process of the coke oven, and replaces the traditional technology for controlling coal charging smoke dust by combining high-pressure ammonia water injection and suction with a coal charging dust removal ground station and regulating the pressure of the coking chamber through the pressure of a gas collecting pipe. As can be seen from fig. 1 and 2, the main working components of PROven are composed of a fixed cup 6, a crown pipe 5, a conical bottom valve 9, a central connecting rod 8, a cylinder 4, an overflow regulating device 10, a valve level controller 15, a pneumatic actuator, a pressure guide pipe and the like.

After the PROven system is put into operation for a period of time, some defects in the design of the PROven system are gradually exposed, the system fault occurrence rate is high, the stable regulation and control of the system pressure are influenced, the pressure fluctuation is large, the influence on smokeless coal charging is caused, the fire door is prone to smoke leakage and fire production or carbonization chamber negative pressure, the great difficulty is increased for the treatment of a smokeless furnace and the maintenance of a coke furnace body and equipment, and the system maintenance cost is also high.

Analyzing the reasons of the faults of the PROven system, it is known that the working medium of the PROven system is circulating ammonia water conveyed by the gas purification system, and the ammonia water contains impurities such as tar, so after the PROven system runs for a period of time, the impurities such as tar can be deposited in the fixed cup 6, the overflow adjusting device 10 and the like or on the components such as the central pull rod 8 and the like, so that the fixed cup 6 is blocked, the conical bottom valve 9 cannot fall to the position, and the central pull rod 8 moves slowly, which are the most common faults causing abnormal pressure adjustment of the system. The ammonia water in the fixed cup 6 is too low in liquid level due to the cone-shaped bottom valve 9 not falling in place, and even the ammonia water in the fixed cup 6 is completely lost, so that the carbonization chamber is in a negative pressure state; the slow action of the central pull rod 8 causes the riser cover and the oven door to run away from smoke and fire, and therefore these faults must be dealt with in a timely manner.

The existing PROven system fault processing method basically comprises the steps that an empty furnace opens a bridge pipe to lift the whole cup valve out of the bridge pipe for processing, multiple kinds of personnel such as machinery, instrument maintainers and ascending pipe operators are required to participate together, normal adjustment from the empty furnace to the end of processing generally needs more than 3 hours, the influence on the normal production sequence of a coke oven is large, the coke yield is reduced, and the wall of the coke oven can be damaged by burning the empty furnace for a long time.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a repair technology for the failure of a PROven system of a coke oven, which can safely, quickly and efficiently eliminate the failure without opening a bridge pipe when an empty oven is used and can ensure that a cup valve is restored to be normally adjusted.

In order to achieve the purpose, the invention adopts the technical scheme that:

the method for repairing the failure of the PROven system of the coke oven specifically comprises the following steps:

the method comprises the following steps: keeping the carbonization chamber of the coke oven with failure to the bridge pipe in a closed state;

step two: closing the opening of the ammonia water branch pipe valve at the bridge pipe flange of the coke oven, completely closing the valves of other ammonia water supplement branches on the bridge pipe, and reducing the total amount of ammonia water sprayed in the bridge pipe; raising the temperature in the bridge pipe;

step three: monitoring the surface temperature of the bridge tube of the coke oven, and entering the next operation step when the surface temperature of the bridge tube is increased to 110-120 ℃;

step four: manually checking the valve position controller, and adjusting the deviation of the valve position of a cup valve of the PROven system; monitoring the surface temperature of the bridge pipe in the check process of the valve controller, and keeping the surface temperature of the bridge pipe within the range of 110-120 ℃;

step five: converting the valve position controller into automatic calibration, and adjusting the deviation of the valve position of the cup valve of the PROven system; monitoring the surface temperature of the bridge pipe in the check process of the valve controller, and keeping the surface temperature of the bridge pipe within the range of 110-120 ℃;

step six: after the valve controller is checked, manually opening a quick ammonia water replenishing branch pipe pneumatic valve on the bridge pipe, simultaneously manually controlling the valve position of a cup valve to move up and down at 70-100%, and quickly washing tar melted on a fixed cup, a crown pipe, a central pull rod and an overflow adjusting device in the bridge pipe by using quick ammonia water;

step seven: after the quick flushing is finished, all the ammonia water branch pipe valves at the bridge pipe flange and valves of other ammonia water supplement branches are opened to a normal state, the ammonia water spraying in the bridge pipe is recovered to a normal state, and the temperature of the bridge pipe is also recovered to a normal state;

step eight: and (4) the valve level controller is restored to an automatic adjusting state, the whole maintenance work is finished, and the repair of the PROven system fault is realized.

And in the second step, the opening of the ammonia water branch pipe valve at the bridge pipe flange is reduced by 10%.

And in the third step, the fourth step and the fifth step, monitoring the surface temperature of the bridge pipe by using a point temperature gun.

In the fourth step, the valve position controller is manually checked, and the parameters to be adjusted are the zero point, the full scale and the linearity of the valve position of the cup valve of the PROven system; the deviations adjusted to "zero", "full" and "linear" are less than 3%.

In the fifth step, the valve position controller automatically checks, and the parameters to be adjusted are the zero point, the full scale and the linearity of the cup valve position of the PROven system; the deviations adjusted to "zero", "full" and "linear" are less than 3%.

In the fourth step, if the surface temperature of the bridge pipe exceeds 120 ℃, the fast ammonia water replenishing branch pipe valve is manually opened, the ammonia water is used for reducing the temperature, and the surface temperature of the bridge pipe is kept within the range of 110-120 ℃.

And in the fifth step, if the surface temperature of the bridge pipe exceeds 120 ℃, manually opening a valve of the quick ammonia water replenishing branch pipe, and reducing the temperature by using ammonia water to keep the surface temperature of the bridge pipe within the range of 110-120 ℃.

The invention has the advantages that: the invention can safely, quickly and efficiently eliminate the fault without opening the bridge pipe by an empty furnace, so that the cup valve is restored to be normally adjusted. Because the bridge pipe maintenance cup valve does not need to be opened when the coke oven is empty, the normal production sequence of the coke oven is not influenced, and the coke yield is not reduced; the method has the advantages of less participators, short time and good effect, can complete the cup valve maintenance work safely, efficiently and with high quality, and shortens the maintenance time from about 3 hours to about 0.5 hour at present. The invention can solve the problems of more participators, long time, low efficiency and great influence on production in the traditional cup valve maintenance method.

The invention has scientific and reasonable design, convenient operation and easy implementation. The repairing technology can be applied to a domestic coke oven PROven system, and has a great popularization value.

Drawings

The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:

FIG. 1 is a schematic structural diagram of a coke oven PROven system of the present invention.

FIG. 2 is a diagram showing the internal construction of a cup valve of the coke oven PROven system of FIG. 1 according to the invention.

FIG. 3 is a schematic structural diagram of an ammonia water replenishing system of the coke oven PROven system.

The labels in the above figures are:

1. coke, 2, a furnace top, 3, an ascending pipe, 4, a cylinder, 5, a crown pipe, 6, a fixed cup, 7, a gas collecting pipe, 8, a central pull rod, 9, a conical bottom valve, 10, an overflow adjusting device, 11, a bridge pipe, 12, an ammonia small branch pipe, 13, an ammonia branch pipe, 14, an ammonia branch pipe at a bridge pipe flange, 15, a valve controller, 16 and a quick ammonia supplementing branch pipe.

Detailed Description

The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.

A coke oven PROven system, namely a pressure regulating system of a coking chamber of a coke oven is mainly composed of a fixed cup 6, a crown pipe 5, a conical bottom valve 9, a central connecting rod 8, a cylinder 4, an overflow regulating device 10, a valve controller 15, a pneumatic actuating mechanism, a pressure guide pipe and the like, as shown in figures 1-2.

The PROven system adjusts the liquid level in the fixed cup 6 through the pneumatic actuator, and can complete the work of conducting the ascending pipe 3 and the gas collecting pipe 7, cutting off the ascending pipe 3 and the gas collecting pipe 7, adjusting the amount of raw coal gas flowing from the ascending pipe 3 to the gas collecting pipe 7, and the like. After PROven receives a signal corresponding to coking time of the coking chamber, the valve controller 15 controls the central connecting rod 8 to move up and down, liquid level height change in the fixed cup 6 is controlled, the change of the liquid level height enables the opening of the crown pipe 5 to change accordingly, and the flow of the crude gas passing through the opening is changed, so that the purpose of adjusting the flow of the crude gas is achieved.

The working medium of the PROven system is circulating ammonia water delivered by the gas purification system, and as shown in fig. 1 and 3, the circulating ammonia water enters the bridge pipe 11 through a pipeline installed on the bridge pipe 11. An ammonia water branch pipe 14 at the bridge pipe flange is arranged at the bridge pipe flange of the bridge pipe 11, and a valve is arranged on the ammonia water branch pipe 14 at the bridge pipe flange. Meanwhile, the bridge pipe 11 is connected with a fast ammonia water replenishing branch pipe 16, an ammonia water branch pipe 13 and an ammonia water small branch pipe 12, and the fast ammonia water replenishing branch pipe 16, the ammonia water branch pipe 13 and the ammonia water small branch pipe 12 are respectively provided with corresponding control valves.

PREFERRED EMBODIMENTS

The failure of the coke oven PROven system is caused by the blockage of a valve of a fixed cup 6, the falling of a conical bottom valve 9, the slow action of a central pull rod 8 and the like, and the method for repairing the failure of the coke oven PROven system comprises the following specific steps:

the method comprises the following steps: the coal charging hole cover, the ascending pipe cover and the bridge pipe cleaning hole cover of the coke oven with faults are adjusted to be in a closed state, and the coke oven carbonization chamber to the bridge pipe 11 is kept in a closed state;

step two: closing the opening of the valves of the ammonia water branch pipes 14 at the bridge pipe flange of the coke oven, and completely closing the valves of other ammonia water supplement branches on the bridge pipe 11, namely completely closing the pneumatic valve of the quick ammonia water supplement branch pipe 16, the valves of the ammonia water branch pipes 13 and the valves of the ammonia water small branch pipes 12 on the bridge pipe 11, so as to reduce the total amount of ammonia water sprayed in the bridge pipe 11; raising the temperature in the bridge pipe 11;

closing the opening of a valve of an ammonia water branch pipe 14 at a bridge pipe flange of the coke oven, closing a pneumatic valve of a quick ammonia water supplement branch pipe 16, a valve of an ammonia water branch pipe 13 and a valve of an ammonia water small branch pipe 12 on a bridge pipe 11, keeping a small amount of ammonia water spraying in the bridge pipe 11 so as to reduce the spraying amount of a PROven cup valve, emptying the ammonia water in a fixed cup and preventing the phenomenon that a rising pipe cover emits big smoke when the liquid level of the ammonia water in the fixed cup 6 is high in the cup valve treatment process; in addition, the temperature in the bridge pipe 11 is raised by closing the spraying amount of the ammonia water to melt impurities such as tar deposited on the cup valve;

step three: monitoring the surface temperature of the bridge pipe 11 of the coke oven, and entering the next operation step when the surface temperature of the bridge pipe 11 rises to 110-120 ℃;

step four: manually checking the valve position controller 15, and adjusting the deviation of the valve position of a cup valve of the PROven system; monitoring the surface temperature of the bridge pipe 11 in the checking process of the valve controller 15, and keeping the surface temperature of the bridge pipe 11 within the range of 110-120 ℃;

step five: converting the valve position controller 15 into automatic verification, and adjusting the deviation of the valve position of the cup valve of the PROven system; monitoring the surface temperature of the bridge pipe 11 in the checking process of the valve controller 15, and keeping the surface temperature of the bridge pipe 11 within the range of 110-120 ℃;

step six: after the valve controller 15 is checked, the pneumatic valve of the fast ammonia water replenishing branch pipe 16 is manually opened, meanwhile, the valve position of the cup valve is manually controlled to move up and down at 70-100%, and fast ammonia water is used for fast washing tar melted on the fixed cup 6, the crown pipe 5, the central pull rod 8 and the overflow adjusting device 10 in the bridge pipe 11;

step seven: after the rapid flushing is finished, all valves of the ammonia water branch pipe 14 and other ammonia water supplement branches at the bridge pipe flange are opened to a normal state, namely all valves of the ammonia water branch pipe 14, the rapid ammonia water supplement branch pipe 16 pneumatic valve, the ammonia water branch pipe 13 and the ammonia water small branch pipe 12 at the bridge pipe flange are opened to a normal state, the ammonia water spraying in the bridge pipe 11 is recovered to a normal state, and the temperature of the bridge pipe 11 is also recovered to a normal state;

step eight: and (4) restoring the valve level controller 15 to an automatic regulation state, finishing the whole maintenance work, and realizing the abnormal pressure regulation fault repair of the PROven system.

In the second step, the opening degree of the ammonia water branch pipe 14 at the bridge pipe flange is reduced by 10%, and the bridge pipe 11 keeps spraying a small amount of ammonia water through the opening degree of the ammonia water branch pipe 14 at the bridge pipe flange.

And in the third step, the fourth step and the fifth step, monitoring the surface temperature of the bridge pipe 11 by using a point temperature gun. When the surface temperature of the bridge pipe 11 reaches the set temperature, the operation of the next step is facilitated, and the fault repairing effect is ensured.

In the fourth step, the valve level controller 15 is manually verified, and the parameters to be adjusted are the zero point, the full scale and the linearity of the valve position of the cup valve of the PROven system; the deviations adjusted to "zero", "full" and "linear" are less than 3%.

In the fifth step, the valve position controller 15 automatically checks, and the parameters to be adjusted are the zero point, the full scale and the linearity of the cup valve position of the PROven system; the deviations adjusted to "zero", "full" and "linear" are less than 3%.

When the PROven pressure adjusting system of the coke oven ascending pipe has several faults of blockage of a cup valve, non-in-place falling of a conical bottom valve 9, slow action of a central pull rod 8 and the like, and the PROven pressure adjusting is influenced, the valve position of the cup valve has large deviation and cannot be automatically checked. After the two steps of operation, the adjustment deviation of the zero point, the full degree and the linear parameters of the valve position is less than 3% under the manual check and the automatic check and adjustment states of the cup valve, so that the valve position of the cup valve is ensured to enter a normal working state, and the faults that the cup valve is blocked, the conical bottom valve 9 does not fall in place and the central pull rod 8 moves slowly are eliminated.

In the fourth step, if the surface temperature of the bridge pipe 11 exceeds 120 ℃, the valve of the fast ammonia water replenishing branch pipe 16 is manually opened, and the ammonia water is used for reducing the temperature, so that the surface temperature of the bridge pipe 11 is kept within the range of 110-120 ℃. The temperature of the bridge pipe 11 is controlled within a set range, which is beneficial to melting impurities such as tar deposited on the cup valve.

And step five, if the surface temperature of the bridge pipe 11 exceeds 120 ℃, manually opening a valve of the fast ammonia water replenishing branch pipe 16, and reducing the temperature by using ammonia water to keep the surface temperature of the bridge pipe 11 within the range of 110-120 ℃. The temperature of the bridge pipe 11 is controlled within a set range, which is beneficial to melting impurities such as tar deposited on the cup valve.