Automatic regulating system and method for horizontal tubes in a coke oven basement heating system

Abstract

The application discloses an automatic adjusting system and method for a horizontal pipe in a coke oven basement heating system, which comprises a horizontal pipe for passing coke oven gas, a plurality of small branch pipes connected to the horizontal pipe, a lower part of the small branch pipes being communicated with a lower injection pipe automatic opening and closing valve, a pipe plug and the horizontal pipe, a guide pipe being connected to a side of the small branch pipe, an electric pressure gauge and an electromagnetic valve being correspondingly installed on the guide pipe, the other end of the guide pipe being connected to a main pipe, the electric pressure gauge being installed on the main pipe, the main pipe being connected to a corresponding branch pipe according to inputted different medium types, the electromagnetic valve being connected to the branch pipe, the electromagnetic valve being connected to a digital controller through a signal line, the digital controller being bidirectionally connected to a DCS system, the DCS system being controlled by a central control room, the central control room being electrically connected to the corresponding electric pressure gauges and being used for monitoring pressures in the guide pipe and the main pipe. The application can integrally, quickly, safely and accurately open the lower opening and closing valve of the end small branch pipe in the horizontal pipe, can timely discharge corrosive liquid and can prolong the service life of the horizontal pipe of the coke oven heating equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coke oven heating equipment, in particular to an automatic adjusting system and method for a horizontal pipe in a coke oven basement heating system. BACKGROUND

[0002] The coke oven horizontal pipe is a kind of gas pipe system belonging to the coke oven heating equipment. The coke oven gas from the main pipe is introduced into a main pipe in the basement, and then distributed to each vertical fire channel through the branch pipe, the horizontal pipe and the small branch pipe, which belongs to a kind of layout of the coke oven lower spray. The coke oven is generally divided into single heating type and reheating type. The reheating type coke oven uses two kinds of gas (blast furnace gas and coke oven gas) for heating, and thus is equipped with two sets of heating gas systems. The single heating type coke oven is only equipped with one set of heating equipment. In the two sets of heating equipment of the reheating type coke oven, the blast furnace gas system is heated, and the coke oven gas system equipment is disabled. The waste gas generated by the blast furnace gas heating is introduced into the small branch pipe, the horizontal pipe and the branch pipe through the brick gas channel with a small part of the descending gas flow, and most of the waste gas stays in the horizontal pipe. The waste gas generated by the blast furnace gas heating has strong corrosiveness because the blast furnace gas contains hydrogen sulfide, hydrogen chloride, sulfur trioxide and sulfur dioxide and other acidic substances. After combustion, acidic gas is generated, which is condensed with acid water at low temperature. These acidic liquids still remain in the horizontal pipe, which causes long-term corrosion of the horizontal pipe and brings great difficulties to the reuse of the horizontal pipe, and even the horizontal pipe cannot be used. SUMMARY

[0003] The present application aims to provide an automatic adjusting system and method for a horizontal pipe in a coke oven basement heating system, which can reduce the corrosion of the inner wall of the horizontal pipe in the coke oven gas heating system, reduce the labor intensity and the operation frequency of the personnel exposed to the dangerous environment, ensure the normal use of the coke oven gas horizontal pipe, and prolong the service life of the coke oven heating equipment horizontal pipe, so as to solve the problems in the above background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] An automatic adjusting system for a horizontal pipe in a coke oven basement heating system, comprising a horizontal pipe for passing coke oven gas, a plurality of small branch pipes connected to the horizontal pipe, the upper part of the small branch pipe being used for communicating with the brick gas channel and directly passing the bottom of the combustion chamber, and the lower part of the small branch pipe being communicated with the lower spray pipe automatic opening and closing valve, the pipe plug and the horizontal pipe; a guide pipe is connected to the side of the small branch pipe and closely arranged below the pipe plug, an electric pressure gauge and an electromagnetic valve are installed on the guide pipe, the other end of the guide pipe is connected to a main pipe for providing medium input, an electric pressure gauge is installed on the main pipe, the main pipe is connected to a corresponding branch pipe according to the type of the input medium, and a corresponding electromagnetic valve is installed on the branch pipe; the electromagnetic valve is connected to a digital controller through a signal line, the digital controller is bidirectionally connected to a DCS system, the DCS system is controlled by a central control room, and the central control room is electrically connected to the corresponding electric pressure gauges for monitoring the pressure in the guide pipe and the main pipe.

[0006] Further, the pipe block controls the flow of the gas flow into the small branch pipe by changing the size of the nozzle aperture inside.

[0007] Further, the lower nozzle automatic opening and closing valve is a circular spring clamp valve made of spring, with a diameter of ≥ 50 mm and a set pressure of 500 Pa, which can be automatically opened when the medium pressure in the horizontal pipe is greater than 500 Pa and automatically closed when the medium pressure in the horizontal pipe is less than 500 Pa.

[0008] Further, the number of horizontal pipes is several, and each horizontal pipe is connected with a guide pipe, and an electric pressure gauge and an electromagnetic valve are installed on each guide pipe.

[0009] The application provides another technical scheme: an automatic adjusting method of horizontal pipes in a coke oven basement heating system, wherein a coke oven has several horizontal rows, and each horizontal row of the coke oven corresponds to two horizontal pipes, and guide pipes A and B, lower nozzle automatic opening and closing valves A and B, lower nozzle automatic opening and closing valves C and D, electric pressure gauges A, B and C, and electromagnetic valves A, B, C and D are arranged correspondingly.

[0010] S1: the type of medium input into the main pipe is switched freely through electromagnetic valves C and D;

[0011] S2: the digital controller feeds back the electromagnetic valves A and B through the output module to execute tasks according to the set program input by the DCS system and the feedback of the DCS system.

[0012] Further, the digital controller program is set according to the coke oven exchange time, and the specific setting is as follows:

[0013] If the upper gas flow of the brick gas channel corresponding to the lower nozzle automatic opening and closing valves A and C is descending gas flow, the electromagnetic valve A is opened, the electric pressure gauge B displays the pressure between 500 Pa and 1500 Pa, and the lower nozzle automatic opening and closing valves A and C are opened at the same time.

[0014] If the adjacent lower nozzle automatic opening and closing valves B and D correspond to ascending gas flow, the electromagnetic valve B is closed, and the lower nozzle automatic opening and closing valves B and D are closed at the same time.

[0015] Further, after the commutation, the electromagnetic valve A is closed, while the lower injection pipe automatic opening and closing valve A and the lower injection pipe automatic opening and closing valve C are closed, the electromagnetic valve B is opened, the electric pressure gauge A displays the pressure at 500Pa-1500Pa, while the lower injection pipe automatic opening and closing valve B and the lower injection pipe automatic opening and closing valve D are opened.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] 1. The automatic adjusting system and method of the horizontal pipe in the coke oven basement heating system can timely discharge the corrosive liquid in the horizontal pipe, prolonging the service life of the horizontal pipe.

[0018] 2. The automatic adjusting system and method of the horizontal pipe in the coke oven basement heating system can well protect the horizontal pipe, providing guarantee for switching the coke oven gas heating of the regenerative coke oven, reducing the labor intensity of the operating personnel and the frequency of heavy and dangerous operation.

[0019] 3. The automatic adjusting system and method of the horizontal pipe in the coke oven basement heating system is scientifically and reasonably designed, fully automated, does not require manual operation, has low investment cost and high practicability, and has great popularization value in the industry. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a system structure diagram of the present application;

[0021] Figure 2 The figure is a closing state diagram of the lower injection pipe automatic opening and closing valve in the present application;

[0022] Figure 3 The figure is an opening state diagram of the lower injection pipe automatic opening and closing valve in the present application;

[0023] Figure 4 The figure is an electric control principle diagram of the system in the present application.

[0024] In the figure: 1, horizontal pipe; 2, pipe plug; 3, small branch pipe; 401, lower injection pipe automatic opening and closing valve A; 402, lower injection pipe automatic opening and closing valve B; 403, lower injection pipe automatic opening and closing valve C; 404, lower injection pipe automatic opening and closing valve D; 5, conduit A; 501, electric pressure gauge A; 502, electric pressure gauge B; 503, electric pressure gauge C; 6, electromagnetic valve A; 7, conduit B; 8, electromagnetic valve B; 9, main pipe; 10, electromagnetic valve C; 11, electromagnetic valve D; 12, central control room; 13, DCS system; 14, digital controller; 15, output module; 16, branch pipe. DETAILED DESCRIPTION

[0025] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0026] Please refer to Figures 1-4 , the present application provides a kind of automatic adjusting system of horizontal pipe in coke oven basement heating system, including horizontal pipe 1 for coke oven gas, horizontal pipe 1 is connected with multiple small branch pipes 3, the upper part of small branch pipe 3 is used to connect brick gas channel, directly through combustion chamber bottom, the lower part of small branch pipe 3 is connected with lower spray pipe automatic opening and closing valve, pipe block 2 and horizontal pipe 1, wherein, lower spray pipe automatic opening and closing valve is made of round spring clamp valve by spring, diameter ≥50mm, set pressure is 500Pa, when the medium pressure in horizontal pipe 1 is greater than 500Pa, it can be automatically opened, less than 500Pa automatically closes;Pipe block 2 controls the airflow flow in horizontal pipe 1 into small branch pipe 3 by replacing the size of nozzle aperture in it;Wherein, the side of small branch pipe 3 is connected with guide pipe, and close to the lower side of pipe block 2, electric pressure gauge and solenoid valve are installed on guide pipe correspondingly, the other end of guide pipe is connected on main pipe 9 for providing medium input, electric pressure gauge is installed on main pipe 9, main pipe 9 is connected with corresponding branch pipe 16 according to the input of different medium types (nitrogen or air), corresponding solenoid valve is installed on branch pipe 16;The solenoid valve is connected with digital controller 14 by signal line, digital controller 14 is connected with DCS system 13 in two-way communication, DCS system 13 is controlled by central control room 12, central control room 12 is also electrically connected with corresponding electric pressure gauge, for monitoring the pressure in guide pipe and main pipe 9.

[0027] The number of horizontal pipe 1 in the present application is provided with several, each horizontal pipe 1 is connected with one guide pipe, and one electric pressure gauge and solenoid valve are installed on each guide pipe. Wherein, one horizontal row number of a coke oven corresponds to two horizontal pipes 1, one coke oven has several horizontal row numbers, and the number of two horizontal pipes 1 is regulated according to the design number of coke oven model in the present application embodiment, and guide pipe A5, guide pipe B7, lower spray pipe automatic opening and closing valve A401, lower spray pipe automatic opening and closing valve B402, lower spray pipe automatic opening and closing valve C403, lower spray pipe automatic opening and closing valve D404, electric pressure gauge A501, electric pressure gauge B502, electric pressure gauge C503, solenoid valve A6, solenoid valve B8, solenoid valve C10 and solenoid valve D11 are correspondingly provided. As shown in Figure 1

[0028] ​The conduit pressure is given in the range of (500-1500) Pa, the upper part of the small branch pipe 3 is connected to the brick gas channel, the lower part is connected to the lower nozzle automatic opening and closing valve A401, the side connecting pipe is blocked 2 and the horizontal pipe 1, the lower nozzle automatic opening and closing valve A401 and the lower nozzle automatic opening and closing valve C403 are the automatic opening and closing valves under the small branch pipe 3 at both ends of the horizontal pipe 1, which are similar to spring clamp valves, and can be automatically opened when the medium pressure in the horizontal pipe 1 is greater than 500 Pa, and automatically closed when the medium pressure in the horizontal pipe 1 is less than 500 Pa. Similarly, the lower nozzle automatic opening and closing valve B402 and the lower nozzle automatic opening and closing valve D404 are the automatic opening and closing valves at both ends of the adjacent horizontal pipe 1. The conduit A5 and the conduit B7 are metal stainless steel conduits, which are connected to the upper side of the lower nozzle automatic opening and closing valve A401 and the lower nozzle automatic opening and closing valve B402, close to the lower side of the pipe block 2, and are aligned with the nozzle port inside, and whether it is correct is checked by the pipe block 2 port. The diameter of the conduit A5 and the conduit B7 is 20 mm, and the medium mainly introduced is air or nitrogen, which is controlled by the electromagnetic valve A6 and the electromagnetic valve B8 to control the pressure in the corresponding conduit A5 and the conduit B7, and the electric pressure gauge B502 and the electric pressure gauge A501 installed on the conduit A5 and the conduit B7 monitor the medium pressure in the conduit. The main pipe 9 is a metal stainless pipe with a diameter of 50 mm, and the internal pressure is monitored by the electric pressure gauge C503, the electromagnetic valve D11 is a bypass valve installed on the branch pipe 16, the electromagnetic valve C10 is installed on the main pipe 9, the electromagnetic valve C10 and the electromagnetic valve D11 freely switch the medium in the pipe, which is transported in the main pipe 9 and distributed to each branch conduit. Among them, the digital controller 14 is given the DCS system 13 by the input setting program, and the digital controller 14 is fed back by the DCS system 13, and the digital controller 14 feeds back the electromagnetic valve A6 and the electromagnetic valve B8 to perform the task through the output module 15.

[0029] In order to further better explain the embodiment of the application, an automatic adjusting method of the horizontal pipe in the coke oven basement heating system is also provided, which comprises the following steps:

[0030] S1: The type of the medium input into the main pipe 9 is freely switched by the electromagnetic valve C10 and the electromagnetic valve D11;

[0031] S2: The digital controller 14 is given the DCS system 13 by the input setting program, and the digital controller 14 is fed back by the DCS system 13, and the digital controller 14 feeds back the electromagnetic valve A6 and the electromagnetic valve B8 to perform the task through the output module 15.

[0032] Among them, the program setting of the digital controller 14 is set according to the coke oven exchange time, which is as follows:

[0033] If the gas flow in the upper part of the brick gas channel corresponding to the lower nozzle automatic opening and closing valve A401 and the lower nozzle automatic opening and closing valve C403 is a descending gas flow, the electromagnetic valve A6 is opened, the electric pressure gauge B502 displays a pressure between 500 Pa and 1500 Pa, and the lower nozzle automatic opening and closing valve A401 and the lower nozzle automatic opening and closing valve C403 are opened at the same time.

[0034] If the gas flow in the upper part of the brick gas channel corresponding to the lower nozzle automatic opening and closing valve B402 and the lower nozzle automatic opening and closing valve D404 is an ascending gas flow, the electromagnetic valve B8 is closed, and the lower nozzle automatic opening and closing valve B402 and the lower nozzle automatic opening and closing valve D404 are closed at the same time.

[0035] In the above adjustment method, after the reversing, the electromagnetic valve A6 is closed, the lower nozzle automatic opening and closing valve A401 and the lower nozzle automatic opening and closing valve C403 are closed at the same time, the electromagnetic valve B8 is opened, the electric pressure gauge A501 displays a pressure between 500 Pa and 1500 Pa, and the lower nozzle automatic opening and closing valve B402 and the lower nozzle automatic opening and closing valve D404 are opened at the same time.

[0036] In summary, the automatic adjustment system and method of the horizontal pipe in the coke oven basement heating system provided by the application is characterized in that the spring clamp automatic opening and closing valve is arranged at the lower part of the small branch pipe 3, so that the corrosive liquid in the horizontal pipe 1 can be discharged in time, and the conduit is opened on the outer side of the upper part of the automatic opening and closing valve, which is close to the pipe plug 2, and the automatic opening and closing valve is opened by the medium pressure, and the automatic opening and closing valve is closed when the medium is closed. The design of the electromagnetic valve can be changed at any time according to the exchange time of the coke oven, and the medium in the main pipe 9 can be freely switched according to the needs. The whole process is fully automated, and manual operation is not required. The application has high practicability, low operation cost, long service life of the horizontal pipe of the coke oven heating system, reduces the heavy and dangerous work of the thermal workers, reduces the equipment and labor costs of the enterprise, and has high popularization value.

[0037] The above is only a preferred embodiment of the application, but the protection scope of the application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the application within the technical range disclosed by the application, which should be covered by the protection scope of the application.

Claims

1. An automatic adjustment system for horizontal pipes in a coke oven basement heating system, characterized in that: The invention comprises a horizontal pipe (1) for passing coke oven gas, a plurality of small branch pipes (3) are connected to the horizontal pipe (1), the upper part of the small branch pipe (3) is used to connect the brick gas channel and directly pass through the bottom of the combustion chamber, and the lower part of the small branch pipe (3) is connected to the automatic opening and closing valve of the lower nozzle, the pipe plug (2) and the horizontal pipe (1); the side of the small branch pipe (3) is connected to a conduit and is close to the lower side of the pipe plug (2), and an electric pressure gauge and a solenoid valve are correspondingly installed on the conduit, and the other end of the conduit is connected to a main pipe (9) for providing medium input, and the main pipe (9 ) is installed on the main pipe (9), and the main pipe (9) is connected to a corresponding branch pipe (16) according to the type of input medium, and a corresponding solenoid valve is installed on the branch pipe (16); the solenoid valve establishes a communication connection with the digital controller (14) through a signal line, and the digital controller (14) establishes a two-way communication connection with the DCS system (13). The DCS system (13) is controlled by the central control room (12), and the central control room (12) is also electrically connected to the corresponding electric pressure gauge for monitoring the pressure in the conduit and the main pipe (9); The pipe plug (2) controls the flow rate of the airflow entering the horizontal pipe (1) to the small branch pipe (3) by changing the size of the nozzle aperture inside.

2. The automatic adjustment system for horizontal pipes in a coke oven basement heating system according to claim 1, characterized in that: The automatic opening and closing valve of the lower nozzle is a circular spring clamp valve made of a spring, with a diameter of ≥50mm and a set pressure of 500Pa. It can automatically open when the medium pressure in the horizontal pipe (1) is greater than 500Pa, and automatically close when it is less than 500Pa.

3. The automatic adjustment system for horizontal pipes in a coke oven basement heating system according to claim 1, characterized in that: There are a number of the transverse pipes (1), each transverse pipe (1) is connected to a corresponding conduit, and each conduit is equipped with an electric pressure gauge and a solenoid valve.

4. A method for automatically adjusting horizontal pipes in a coke oven basement heating system, implemented based on the automatic adjustment system for horizontal pipes in a coke oven basement heating system according to claim 3, characterized in that: A coke oven row number corresponds to two horizontal pipes (1), and is equipped with a guide tube A (5), a guide tube B (7), a lower nozzle automatic opening and closing valve A (401), a lower nozzle automatic opening and closing valve B (402), a lower nozzle automatic opening and closing valve C (403), a lower nozzle automatic opening and closing valve D (404), an electric pressure gauge A (501), an electric pressure gauge B (502), an electric pressure gauge C (503), a solenoid valve A (6), a solenoid valve B (8), a solenoid valve C (10), and a solenoid valve D (11); the specific adjustment method is as follows: S1: The type of medium input into the main pipe (9) is freely switched through the solenoid valve C (10) and the solenoid valve D (11); S2: The digital controller (14) inputs the setting program to the DCS system (13), and the DCS system (13) then feeds back to the digital controller (14). The digital controller (14) then feeds back to the solenoid valve A (6) and the solenoid valve B (8) through the output module (15) to execute the task.

5. The automatic adjustment method for horizontal pipes in a coke oven basement heating system according to claim 4, characterized in that: The program setting of the digital controller (14) is set according to the coke oven exchange time, as follows: If the airflow in the upper part of the brick gas channel corresponding to the lower nozzle automatic opening and closing valve A (401) and the lower nozzle automatic opening and closing valve C (403) is a descending airflow, the solenoid valve A (6) opens, the electric pressure gauge B (502) displays a pressure between 500Pa and 1500Pa, and the lower nozzle automatic opening and closing valve A (401) and the lower nozzle automatic opening and closing valve C (403) open accordingly; If the adjacent lower nozzle automatic opening and closing valves B (402) and lower nozzle automatic opening and closing valves D (404) correspond to the rising airflow, the solenoid valve B (8) is closed, and the lower nozzle automatic opening and closing valves B (402) and lower nozzle automatic opening and closing valves D (404) are also closed.

6. The automatic adjustment method for horizontal pipes in a coke oven basement heating system according to claim 5, characterized in that: After the reversal, the solenoid valve A (6) is closed, and at the same time, the lower nozzle automatic opening and closing valve A (401) and the lower nozzle automatic opening and closing valve C (403) are closed, and the solenoid valve B (8) is opened. The electric pressure gauge A (501) displays a pressure of 500Pa-1500Pa, and at the same time, the lower nozzle automatic opening and closing valve B (402) and the lower nozzle automatic opening and closing valve D (404) are opened.

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