CN113621389B - Measuring and adjusting method for temperature of heat storage chamber - Google Patents

Measuring and adjusting method for temperature of heat storage chamber Download PDF

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Publication number
CN113621389B
CN113621389B CN202110983967.6A CN202110983967A CN113621389B CN 113621389 B CN113621389 B CN 113621389B CN 202110983967 A CN202110983967 A CN 202110983967A CN 113621389 B CN113621389 B CN 113621389B
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temperature
small
gas
flue
air
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CN113621389A (en
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陈锡通
史世庄
曾宗浪
方红明
邹智华
徐珍
石慧峰
王世杰
李德平
陈冬灵
陈为载
肖智强
吴孝勇
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Wuhan University of Science and Engineering WUSE
SGIS Songshan Co Ltd
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Wuhan University of Science and Engineering WUSE
SGIS Songshan Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B21/00—Heating of coke ovens with combustible gases
    • C10B21/10—Regulating and controlling the combustion
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B21/00—Heating of coke ovens with combustible gases
    • C10B21/10—Regulating and controlling the combustion
    • C10B21/16—Regulating and controlling the combustion by controlling or varying the openings between the heating flues and the regenerator flues
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)

Abstract

The invention relates to the technical field of coke oven thermal regulation, and particularly discloses a measuring and regulating method for the temperature of a heat storage chamber. The method is applied to a heat accumulating type coke oven system and comprises the following steps: simultaneously measuring the temperatures of the coal gas small flue and the air small flue with the same serial number by using a temperature measuring device; and judging the heating mode of the heat accumulating type coke oven system, expanding the opening degree of the adjusting turning plate of the small flue of which the temperature needs to be increased, reducing the opening degree of the adjusting turning plate of the small flue of which the temperature needs to be reduced, adjusting the temperature difference value to be between the first temperature and the second temperature if the coke oven system is heated by using coke oven gas, and adjusting the temperature difference value to be between the third temperature and the fourth temperature if the coke oven system is heated by using blast furnace gas. By means of the method, the two heat storage chambers can preheat the ascending air flow to be close to the temperature, the condition that the pressure of the observation hole and the air coefficient in the combustion chamber are influenced is avoided, the heat brought out by waste gas is reduced, the heat exchange efficiency of the heat storage chambers is improved, and the uniformity of the straight-going temperature of the coke oven is improved.

Description

Measuring and adjusting method for temperature of heat storage chamber
Technical Field
The invention relates to the technical field of coke oven thermal regulation, in particular to a measuring and regulating method for the temperature of a heat storage chamber.
Background
As shown in fig. 1-3, modern coke ovens are provided with regenerators, and are therefore referred to as regenerative coke ovens. The heat storage chamber is filled with lattice bricks, the upper part of the heat storage chamber is provided with a heat storage top space, the heat storage top temperature and pressure measuring hole 104 is arranged outside the heat storage chamber, the lower part of the heat storage chamber is provided with a small gas flue 109 or a small air flue 110, the upper part of the small gas flue is covered with grate bricks 111, namely the cover top bricks of the small gas flue are the grate bricks 111, and the lattice bricks are erected on the grate bricks. The small flue is connected with a waste gas tray 112 (also called an exchange shutter), the waste gas tray 112 is composed of two fork parts and a valve body, the two fork parts comprise a gas fork and an air fork, the gas fork is connected with the gas small flue 109 and the valve body, the air fork is connected with the air small flue 110 and the valve body, the waste gas tray 112 is provided with a small flue temperature measuring hole 113, and the arrangement of the small flue temperature measuring hole 113 facilitates the measurement of the temperature of waste gas leaving the regenerator (namely the temperature of the small flue) by operators; a waste gas lead 114, a gas lead 115 and a gas regulation turning plate 116 or an air regulation turning plate 117 are arranged in the valve body, a damper is arranged outside the valve body, and the waste gas lead 114, the gas lead 115 and the damper are matched with each other to complete the reversing of the heat accumulating type coke oven system; gas regulating flap 116 is used to regulate the flow of exhaust gas exiting gas regenerator 105 and air regulating flap 117 is used to regulate the flow of exhaust gas exiting air regenerator 106. The exhaust gas leaving both the air regenerator 106 and the gas regenerator 105 enters the branch flue 119. The sensible heat of the waste gas is recovered in a heat accumulating type heat exchange mode, the preheated air and/or blast furnace gas are returned to the coke oven, and the process is realized by reversing. Typically, a commutation period includes a cooling period (i.e., a rise period) and a heating period (i.e., a fall period). The checker bricks transfer heat to an updraft (the updraft comprising air and/or blast furnace gas) passing through the checker bricks during the cooling period; the waste gas in the heating period passes through the checker bricks to transfer heat to the checker bricks, and the checker bricks are heat transfer media for heat storage type heat exchange. The small gas flue 109 and the checker bricks in the gas regenerator 105 and the small air flue 110 and the checker bricks in the air regenerator 106 are separated by the grate bricks 111, grate brick holes are formed in the grate bricks 111, and the distribution of the updraft in the length direction of the regenerators in the gas regenerator 105 or the air regenerator 106 can be optimized by utilizing the grate brick holes, so that the effect of improving the temperature distribution in the regenerators is also facilitated. When blast furnace gas is used for heating, in a cooling period (namely a rising period), one of the two regenerators in the same number passes through the blast furnace gas and the other passes through combustion air and is introduced into the two adjacent combustors 210 through the chute 230 to be mixed and combusted, so that the regenerators are divided into a gas regenerator 105 and an air regenerator 106 which are numbered the same, for example, a No. 5M gas regenerator and a No. 5K air regenerator. During the heating period (i.e., the ramp down period), both regenerators of the same number pass exhaust gases from both combustion chambers 210. When the coke oven gas is used for heating, the two heat storage chambers in the same cooling period (namely the rising period) are both communicated with the two adjacent combustion chambers 210 through air by the chutes 230, and the coke oven gas is sent into the combustion chambers 210 through the vertical brick gas channel 118 to be mixed and combusted. During the heating period (i.e., the descent period), both regenerators of the same number pass exhaust gases from both combustion chambers 210. It can be seen that the two regenerators of the same number, which supply air and gas to the two combustion chambers 210 when they ascend, receive exhaust gas from two adjacent combustion chambers 210 when they descend, i.e. one combustion chamber 210 is connected to two sets of regenerators of the same number (i.e. four regenerators). And a set of identical regenerators would be connected to two combustors 210. Therefore, the coke ovens are mutually crossed and have complex structures, so that the heating adjustment of the coke ovens is very complex and difficult.
In production, after the suction force at the top of the coke oven regenerator is adjusted uniformly according to the requirements of a heating system, the temperature difference of the waste gas in the gas small flue 109 and the air small flue 110 of the same number is too large due to various reasons, which is not beneficial to the recovery of waste gas heat and the heating management of the coke oven, and brings hidden troubles to the normal operation of a heat accumulating coke oven system. The heat brought out by the waste gas is increased, the energy is wasted, the difference of the preheating temperature of the ascending air flow after the direction change is larger, the combustion temperature in the vertical flue is influenced, and the uniformity of the straight-going temperature of the coke oven is not facilitated.
The exhaust gas in the gas regenerator 105 and the air regenerator 106 of the same number comes from two adjacent combustion chambers 210, the structures and the heat exchange areas of the regenerators are completely the same, and the temperature of the exhaust gas leaving the regenerators (namely the temperature of a small flue) is greatly different, which indicates that the amount of the exhaust gas passing through the two regenerators is unreasonable. Therefore, the temperature difference between the gas small flue 109 and the air small flue 110 of the same size should be of high concern.
For the phenomenon that the temperature difference between the small gas flue 109 and the small air flue 110 of the same number is large, the heat management of the coke oven is not taken attention at present, and the heat management has no corresponding test and regulation rules and no control range of the temperature difference between the small gas flue 109 and the small air flue 110. In the heating process of the coke oven, technicians only pay attention to finding the blowby of the oven body (including the blowby of the main wall 108 or the single wall 107 of the regenerator), the ignition condition and the average temperature of the small flues of the whole oven when measuring the temperature of the small flues, and do not check the uniformity of the temperature of each small flue of the whole oven and the rationality of the temperature difference, only stipulating that the temperature of the small flues is controlled to be 450 ℃ when the coke oven gas is adopted for heating and the temperature of the small flues is controlled to be 400 ℃ when the blast furnace gas is adopted for heating.
Disclosure of Invention
The invention aims to provide a method for measuring and adjusting the temperature of a heat storage chamber, and aims to solve the problem that the temperature difference between a coal gas heat storage chamber and an air heat storage chamber is difficult to measure and adjust.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for measuring and adjusting the temperature of a heat storage chamber is applied to a heat storage type coke oven system and comprises the following steps:
s11, simultaneously measuring the temperatures of the coal gas small flue and the air small flue with the same serial number by using a temperature measuring device;
s20, judging the heating mode of the heat accumulating type coke oven system, if the heat accumulating type coke oven system adopts coke oven gas for heating, performing S30, and if the heat accumulating type coke oven system adopts blast furnace gas for heating, performing S40;
s30, calculating a temperature difference value obtained by subtracting the temperature of the small air flue from the temperature of the small coal gas flue, if the temperature difference value is smaller than a first temperature, performing S31, if the temperature difference value is larger than a second temperature, performing S32, and if the temperature difference value is between the first temperature and the second temperature, completing the operation of measuring and adjusting the temperature of the heat storage chamber;
s31, adjusting the coal gas adjusting turning plate and the air adjusting turning plate to reduce the opening degree of the air adjusting turning plate and expand the opening degree of the coal gas adjusting turning plate, and then performing the step S33;
s32, adjusting the coal gas adjusting turning plate and the air adjusting turning plate to enlarge the opening degree of the air adjusting turning plate and reduce the opening degree of the coal gas adjusting turning plate, and then performing the step S33;
s33, after the heat accumulating type coke oven system passes through N reversing periods, measuring the temperatures of the small coal gas flue and the small air flue again by using the temperature measuring device, and returning to the step S30, wherein N is a positive integer;
s40, calculating a temperature difference value obtained by subtracting the temperature of the small air flue from the temperature of the small coal gas flue, if the temperature difference value is smaller than a third temperature, performing S51, if the temperature difference value is larger than a fourth temperature, performing S52, and if the temperature difference value is between the third temperature and the fourth temperature, completing the operation of measuring and adjusting the temperature of the heat storage chamber;
s51, adjusting the coal gas adjusting turning plate and the air adjusting turning plate to reduce the opening degree of the air adjusting turning plate and expand the opening degree of the coal gas adjusting turning plate, and then performing the step S53;
s52, adjusting the coal gas adjusting turning plate and the air adjusting turning plate to enlarge the opening degree of the air adjusting turning plate and reduce the opening degree of the coal gas adjusting turning plate, and then performing the step S53;
and S53, measuring the temperatures of the small gas flue and the small air flue by using the temperature measuring device again after the heat accumulating type coke oven system passes K reversing periods, and returning to the step S40, wherein K is a positive integer.
Wherein the temperature measuring device comprises a thermocouple or a disk thermometer.
Further, the detailed step of step S11 includes:
and S12, inserting the temperature measuring device into the small flue temperature measuring hole.
Preferably, step S11 is preceded by the steps of:
and S10, performing suction uniformity adjustment on the tops of the gas regenerator and the air regenerator.
Preferably, the first temperature is-10 ℃.
Preferably, the second temperature is 10 ℃.
Preferably, the third temperature is 20 ℃.
Preferably, the fourth temperature is 30 ℃.
Preferably, the number N of commutation periods is 2 or 3.
Preferably, the number K of commutation periods is 2 or 3.
The invention has the beneficial effects that:
the method utilizes a temperature measuring device to obtain the temperature of the waste gas when the waste gas leaves the two regenerators in a mode of simultaneously measuring the temperatures of the small flues of the coal gas regenerator and the air regenerator which are in the same number. When the temperature difference value of the small gas flue and the small air flue exceeds the specification, the adjustment of the waste gas temperature at the small gas flue and the small air flue can be completed by adjusting the opening degree of the gas adjusting turning plate and the air adjusting turning plate. After repeated adjustment for many times, the temperature difference meets the operation requirement of the heat accumulating type coke oven system.
The operation of adjusting the temperature difference between the small gas flue and the small air flue to a certain range not only reduces the heat brought out by the waste gas and the energy consumption, but also enables the preheating temperature of the ascending air flow after reversing to be consistent and improves the heating management level of the coke oven. Meanwhile, the ascending air flow is preheated to the same temperature by the two regenerators after the direction change, so that the influence on the pressure of a furnace top observation hole of the combustion chamber and the air coefficient of the combustion chamber can be avoided. The method reduces the heat brought out by the waste gas, improves the heat exchange efficiency of the regenerative chambers, ensures the flame temperature of each combustion chamber, supplements and perfects the technologies of coke oven heating management and coke oven fire regulation, has simple measurement and convenient regulation, can improve the heat exchange efficiency of the coke oven regenerative chambers, and can also improve the heating management level of the coke oven.
Drawings
FIG. 1 is a schematic structural diagram of a regenerative coke oven provided by the present invention;
FIG. 2 is a schematic structural view of a regenerator of a coke oven provided in accordance with the present invention;
FIG. 3 is a schematic structural diagram of air regenerator number two according to the present invention;
FIG. 4 is a graph of the small flue temperature before regenerator side conditioning according to an embodiment of the present invention;
FIG. 5 is a graph of the temperature of the small flue after being adjusted by the regenerator side according to an embodiment of the present invention;
FIG. 6 is a graph of the temperature of the small flue before coke side conditioning in the regenerator in accordance with an embodiment of the present invention;
FIG. 7 is a graph of the coke side conditioned small flue temperature of the regenerator in accordance with an embodiment of the present invention;
FIG. 8 is a graph of the small flue temperature before regenerator side conditioning as provided by the second embodiment of the present invention;
FIG. 9 is a graph of the temperature of the small flue after being adjusted by the regenerator side according to the second embodiment of the present invention;
FIG. 10 is a graph of the temperature of the small flue before coke side conditioning in the regenerator provided in accordance with example two of the present invention;
FIG. 11 is a graph of the coke-side adjusted small flue temperature of the regenerator provided in accordance with example two of the present invention.
In the figure:
104. a roof storage temperature and pressure measuring hole; 105. a gas regenerator; 106. an air regenerator; 107. a single wall; 108. a main wall; 109. a small gas flue; 110. a small air flue; 111. grate bricks; 112. an exhaust gas tray; 113. a small flue temperature measuring hole; 114. waste gas is blocked; 115. carrying out coal gas sliding; 116. a coal gas adjusting turning plate; 117. an air conditioning flap; 118. a vertical brick gas channel; 119. dividing a flue;
210. a combustion chamber; 220. a fire observation hole; 230. a chute.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The embodiment provides a method for measuring and adjusting the temperature of a heat storage chamber, which is applied to a heat storage type coke oven system and comprises the following steps:
step one, the temperature of the gas small flue 109 and the temperature of the air small flue 110 with the same serial number are measured simultaneously by using a temperature measuring device.
And step two, judging the heating mode of the heat accumulating type coke oven system, if the heat accumulating type coke oven system adopts coke oven gas for heating, performing step three, and if the heat accumulating type coke oven system adopts blast furnace gas for heating, performing step seven.
And step three, calculating a temperature difference value obtained by subtracting the temperature of the air small flue 110 from the temperature of the gas small flue 109, if the temperature difference value is smaller than the first temperature, performing step four, if the temperature difference value is larger than the second temperature, performing step five, and if the temperature difference value is between the first temperature and the second temperature, completing the operation of measuring and adjusting the temperature of the heat storage chamber.
Step four, adjusting the coal gas adjusting turning plate 116 and the air adjusting turning plate 117 to reduce the opening degree of the air adjusting turning plate 117 and expand the opening degree of the coal gas adjusting turning plate 116, and then performing step six;
step five, adjusting the coal gas adjusting turning plate 116 and the air adjusting turning plate 117 to enlarge the opening degree of the air adjusting turning plate 117 and reduce the opening degree of the coal gas adjusting turning plate 116, and then performing step six;
step six, after the heat accumulating type coke oven system passes through N reversing cycles, measuring the temperatures of the gas small flue 109 and the air small flue 110 by using the temperature measuring device again, and returning to the step three, wherein N is a positive integer;
step seven, calculating a temperature difference value obtained by subtracting the temperature of the air small flue 110 from the temperature of the gas small flue 109, if the temperature difference value is smaller than a third temperature, performing step eight, if the temperature difference value is larger than a fourth temperature, performing step nine, and if the temperature difference value is between the third temperature and the fourth temperature, completing the operation of measuring and adjusting the temperature of the heat storage chamber;
step eight, adjusting the coal gas adjusting turning plate 116 and the air adjusting turning plate 117 to reduce the opening degree of the air adjusting turning plate 117 and expand the opening degree of the coal gas adjusting turning plate 116, and then performing step ten;
step nine, adjusting the coal gas adjusting turning plate 116 and the air adjusting turning plate 117 to enlarge the opening degree of the air adjusting turning plate 117 and reduce the opening degree of the coal gas adjusting turning plate 116, and then performing step ten;
step ten, after the heat accumulating type coke oven system passes K reversing periods, measuring the temperatures of the gas small flue 109 and the air small flue 110 by using the temperature measuring device again, and returning to the step seven, wherein K is a positive integer.
The method utilizes a temperature measuring device to obtain the temperature of the waste gas when the waste gas leaves the two regenerators by simultaneously measuring the temperature of the small flue of the same number of the gas regenerator 105 and the air regenerator 160. When the temperature difference value of the small gas flue 109 and the small air flue 110 exceeds the specification, the temperature of the waste gas at the small gas flue 109 and the small air flue 110 can be adjusted by adjusting the opening degree of the gas adjusting turning plate 116 and the air adjusting turning plate 117. After repeated adjustment for many times, the temperature difference meets the operation requirement of the heat accumulating type coke oven system.
The temperature difference between the small gas flue 109 and the small air flue 110 is adjusted to a certain range, so that the heat brought out by waste gas is reduced, the energy consumption is reduced, the preheating temperature of ascending air flow after reversing tends to be consistent, and the heating management level of the coke oven is improved. Meanwhile, because the two regenerators preheat the ascending air flow to the basically same temperature after the reversing, the influence on the pressure of the furnace top observation hole 220 of the combustion chamber 210 and the air coefficient of the combustion chamber 210 can be avoided. The method reduces the heat brought out by the waste gas, improves the heat exchange efficiency of the regenerator, ensures the flame temperature of each combustion chamber 210, improves the uniformity of the straight-going temperature of the regenerative coke oven, supplements and perfects the technologies of coke oven heating management and coke oven fire regulation, has simple measurement and convenient adjustment, can improve the heat exchange efficiency of the coke oven regenerator, and can improve the heating management level of the coke oven.
Preferably, the number N of commutation periods is 2 or 3 and the number K of commutation periods is 2 or 3.
Specifically, the operator slightly adjusts the gas adjusting flap 116 and the air adjusting flap 117 on a small scale, and the adjustment is usually performed 1-2 times.
At present, the control range of the temperature difference between the gas small flue 109 and the air small flue 110 with the same number is not specified. The temperature difference between the two is specified according to theoretical analysis, production experience and production conditions.
The same number of coal gas and air heat accumulation chamber waste gas come from two adjacent combustion chambers 210 and enter the tops of the heat accumulation chambers at the same temperature.
The temperature of the small flue depends on the coking time, the type of heating gas and the like. The requirement for the regenerator is to preheat the preheated gas (including blast furnace gas or air) to the same temperature.
Therefore, the control range of the temperature difference between the gas small flue 109 and the air small flue 110 of the same number is mainly influenced by the type and composition of the heated gas.
According to theoretical analysis, production experience and production conditions, the following are determined:
when the regenerative coke oven system is heated by coke oven gas, the gas regenerator 105 and the air regenerator 106 which are the same in number pass through air when ascending and the required gas amount is the same (the opening degree of the air door is the same), so the exhaust gas amount passing through the gas regenerator 105 and the air regenerator 106 when descending is the same, and therefore, the temperatures of the gas small flue 109 and the air small flue 110 which are the same in number are the same. Considering the precision of measurement, regulation and control, the temperature difference between the two is preferably controlled within-10 ℃ to 10 ℃. That is, when the temperature difference between the gas small flue 109 and the air small flue 110 of the same number is less than-10 ℃ or more than 10 ℃, the adjustment should be performed.
When the regenerative coke oven system adopts blast furnace gas for heating, the volume of the blast furnace gas is larger than that of combustion air, and simultaneously, the heat capacity of the blast furnace gas is also larger than that of the air, and the difference value depends on the composition of the blast furnace gas. Therefore, in order to ensure that the preheating temperature of the air and the gas is the same when the flue gas rises, the gas regenerator 105 should accumulate a large amount of heat, that is, a large amount of heat should be brought into the gas regenerator 105 when the flue gas falls, that is, a large amount of exhaust gas passes through, so that the temperature of the checker bricks is increased, and the temperature of the exhaust gas in the small flue is correspondingly increased. Therefore, the temperature of the gas chimney 109 should be higher than the temperature of the air chimney 110. According to theoretical analysis and domestic production experience, the temperature difference between the small coal gas flue 109 and the small air flue 110 is preferably controlled to be 20-30 ℃. That is, when the temperature difference between the gas small flue 109 and the air small flue 110 is more than 30 ℃ and less than 20 ℃, the adjustment should be performed.
Preferably, the temperature measuring means comprises a thermocouple or a disk thermometer. The thermocouple or the disk thermometer has the advantages of simple structure, low manufacturing cost and good heat resistance, and can be suitable for the temperature measurement work of the gas small flue 109 and the air small flue 110 for a long time.
Further, the detailed steps of the first step include: the temperature measuring device is inserted into the small flue temperature measuring hole 113. The temperature of the outlet of the gas small flue 109 or the air small flue 110 can be accurately measured by inserting a thermocouple or a disk thermometer directly into the outlet of the gas small flue 109 or the air small flue 110 through the small flue temperature measuring hole 113.
Preferably, the following steps are included before the step one: suction uniformity adjustments are made to the top of the gas and air regenerators 105 and 106. Specifically, the adjustment is completed on the premise of meeting the requirements according to the heating system. The arrangement ensures the accuracy of the temperature measurement device on the gas small flue 109 and the air small flue 110 in a manner of adjusting the suction uniformity in advance, thereby improving the efficiency of the temperature measurement and adjustment operation of the heat storage chamber.
Example one
A group of coke ovens is numbered as 1#2# and is a 2X 55-hole JN60-6F type 6m coke oven. The coke oven gas is adopted for heating, the turnover time is 19 hours, the standard temperature is 1260/1310 ℃, the opening degrees of the air inlet doors on the same side of the gas heat storage chamber 105 and the air heat storage chamber 106 are consistent, and the production is normal.
Further measurements and adjustments were made using the method of the invention. In this example, a coke oven No. 18 regenerator was selected for testing:
a thermocouple is inserted into a small flue temperature measuring hole 113, the temperatures of the waste gas of the small gas flue 109 and the small air flue 110 on the machine side and the coke side of the No. 18 regenerator of the first coke oven are measured on line, the temperatures of the small gas flue 109 and the small air flue 110 are read on line at any time after reversing for five minutes, and the temperature difference between the small gas flue 109 and the small air flue 110 is compared and used as the basis of on-site adjustment. After the measurement is completed, data is derived, the average temperature in the whole process is calculated, and the temperature difference between the gas small flue 109 and the air small flue 110 is calculated, and the measurement results are shown in table 1, fig. 4 and fig. 6.
The temperature difference values of the small coal gas flues 109 and the small air flues 110 on the machine side and the coke side are respectively 51 ℃ and 106 ℃, which are both more than 10 ℃, so that the adjustment is required, and the adjustment mode is the same.
The opening degree of the coal gas adjusting turning plate 116 is gradually reduced, and the opening degree of the air adjusting turning plate 117 is gradually enlarged. And observing the temperature change of the small gas flue 109 and the small air flue 110, and repeatedly performing fine adjustment to ensure that the temperature difference value of the small gas flue 109 and the small air flue 110 is between-10 ℃ and 10 ℃.
Thermocouples were maintained for 2 to 3 commutation periods and the results were measured as adjusted small flue temperatures as shown in table 1, fig. 5 and fig. 7.
TABLE 1
Figure BDA0003230077410000121
Example two
A group of coke ovens is numbered 6#7 and is a BS60-2 type 6m coke oven with 2 x 55 holes. The blast furnace gas is adopted for heating, the turnover time is 19 hours, the standard temperature is 1260/1310 ℃, and the production is normal.
Further measurements and adjustments were made using the method of the invention. In the embodiment, a No. 100 regenerator of a No. seven coke oven is selected for regulation and measurement:
a thermocouple is inserted into a small flue temperature measuring hole 113, the temperatures of the waste gas of the small gas flue 109 and the small air flue 110 on the machine side and the coke side of the No. 100 regenerator of the No. seven coke oven are measured on line, the temperatures of the small gas flue 109 and the small air flue 110 are read on line at any time after reversing for five minutes, and the temperature difference between the small gas flue 109 and the small air flue 110 is compared and used as the basis of on-site adjustment. After the measurement is finished, data are exported, the average temperature in the whole process is calculated, and the temperature difference value of the gas small flue 109 and the air small flue 110 is calculated. The measurement results are shown in table 2, fig. 8 and fig. 10.
The temperature difference between the small gas flue 109 and the small air flue 110 on the machine side is 56 ℃ and is more than 30 ℃, so that the adjustment is needed. The opening of the gas regulating flap 116 is gradually reduced while the opening of the air regulating flap 117 is gradually enlarged. And the temperature changes of the gas small flue 109 and the air small flue 110 are observed. The temperature difference between the gas small flue 109 and the air small flue 110 is 20-30 ℃.
The temperature difference between the small coal gas flue 109 on the coke side and the small air flue 110 is-70 ℃ and less than 20 ℃, so that the adjustment is needed. The opening of the gas regulating flap 116 is gradually enlarged while the air regulating flap 117 is gradually reduced. And observing the temperature change of the small gas flue 109 and the small air flue 110, so that the temperature difference between the small gas flue 109 and the small air flue 110 is 20-30 ℃.
Thermocouples were kept for 2 to 3 exchange cycles, and the results were measured as adjusted small flue temperatures as shown in table 2, fig. 8, and fig. 10.
TABLE 2
Figure BDA0003230077410000131
The first and second examples show that the temperature difference between the gas small flue 109 and the air small flue 110 is substantially consistent after reversing for five minutes in the whole reversing period.
EXAMPLE III
The regenerative coke oven system of the third embodiment is basically the same as the first embodiment, and the difference between the regenerative coke oven system and the first embodiment is that a simpler disc type thermometer with convenient reading is used for measurement.
In the embodiment, a No. 86 regenerator of a second coke oven is selected for regulation and measurement:
inserting a disk thermometer from a small flue temperature measuring hole 113, measuring the exhaust gas temperatures of the small gas flue 109 and the small air flue 110 at the machine side and the coke side of the No. 86 regenerator of the No. two coke oven, reversing for five minutes, reading and comparing the temperature difference between the small gas flue 109 and the small air flue 110: the machine side was 21 ℃ and the coke side 71 ℃. And the temperature 20 minutes after the reversal represents the small flue temperature before the adjustment. The measurement results are shown in table 3.
Because the temperature difference values of the small coal gas flues 109 and the small air flues 110 on the machine side and the coke side are that the small coal gas flues 109 are higher than the small air flues 110 and are both more than 10 ℃, the adjustment is needed, and the adjustment mode is the same.
The opening degree of the coal gas adjusting turning plate 116 is gradually reduced, and the opening degree of the air adjusting turning plate 117 is gradually enlarged. And observing the temperature change of the small gas flue 109 and the small air flue 110, and repeatedly performing fine adjustment to ensure that the temperature difference between the small gas flue 109 and the small air flue 110 is less than 10 ℃.
The disk thermometer was left for 2 to 3 commutation periods to observe the temperature difference between the conditioned gas mini-stack 109 and the conditioned air mini-stack 110. The adjusted small flue temperature is represented as the temperature 20 minutes after the reversal. The adjusted small stack temperature is shown in table 3.
TABLE 3
Figure BDA0003230077410000141
Example four
The regenerative coke oven system of the fourth embodiment is basically the same as the second embodiment, and the difference between the regenerative coke oven system and the second embodiment is that a disc type thermometer which is simpler and convenient to read is used for facilitating measurement and adjustment.
In the embodiment, a No. 34 regenerator of a No. six coke oven is selected for regulation and measurement:
inserting a disk thermometer from a small flue temperature measuring hole 113, measuring the temperatures of the waste gases of the small gas flue 109 and the small air flue 110 at the machine side and the coke side of the No. 34 regenerator of the No. six coke oven, reversing for five minutes, reading and comparing the temperature difference values of the small gas flue 109 and the small air flue 110: the machine side was 46 ℃ and the coke side 65 ℃. And the temperature 20 minutes after the reversal represents the small flue temperature before the adjustment. The measurement results are shown in table 4.
Because the temperature difference values of the small coal gas flues 109 and the small air flues 110 on the machine side and the coke side are that the small coal gas flues 109 are higher than the small air flues 110 and are more than 30 ℃, the adjustment is needed, and the adjustment mode is the same.
The opening degree of the gas adjusting turning plate 116 is gradually reduced, and the opening degree of the air adjusting turning plate 117 is gradually enlarged. And observing the temperature change of the small gas flue 109 and the small air flue 110, so that the temperature difference between the small gas flue 109 and the small air flue 110 is 20-30 ℃.
The disk thermometer was left for 2 to 3 reversal cycles to observe the temperature difference between the conditioned gas mini-stack 109 and the conditioned air mini-stack 110. The adjusted small flue temperature is represented as the temperature 20 minutes after the reversal. The adjusted small stack temperature is shown in table 4.
TABLE 4
Figure BDA0003230077410000151
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A method for measuring and adjusting the temperature of a heat storage chamber is applied to a heat storage type coke oven system and is characterized by comprising the following steps:
s11, simultaneously measuring the temperatures of the small gas flues (109) and the small air flues (110) with the same serial numbers by using a temperature measuring device;
s20, judging the heating mode of the heat accumulating type coke oven system, if the heat accumulating type coke oven system adopts coke oven gas for heating, performing S30, and if the heat accumulating type coke oven system adopts blast furnace gas for heating, performing S40;
s30, calculating the temperature difference between the temperature of the small gas flue (109) and the temperature of the small air flue (110), if the temperature difference is smaller than a first temperature, performing S31, if the temperature difference is larger than a second temperature, performing S32, and if the temperature difference is between the first temperature and the second temperature, completing the operation of measuring and adjusting the temperature of the heat storage chamber;
s31, adjusting a coal gas adjusting turning plate (116) and an air adjusting turning plate (117) to reduce the opening degree of the air adjusting turning plate (117) and expand the opening degree of the coal gas adjusting turning plate (116), and then performing S33;
s32, adjusting a coal gas adjusting turning plate (116) and an air adjusting turning plate (117), expanding the opening degree of the air adjusting turning plate (117), reducing the opening degree of the coal gas adjusting turning plate (116), and then performing the step S33;
s33, after the heat accumulating type coke oven system passes through N reversing periods, measuring the temperatures of the small gas flue (109) and the small air flue (110) by using the temperature measuring device again, and returning to the step S30, wherein N is a positive integer;
s40, calculating a temperature difference value obtained by subtracting the temperature of the small air flue (110) from the temperature of the small coal gas flue (109), if the temperature difference value is smaller than a third temperature, performing S51, if the temperature difference value is larger than a fourth temperature, performing S52, and if the temperature difference value is between the third temperature and the fourth temperature, completing the operation of measuring and adjusting the temperature of the heat storage chamber;
s51, adjusting a coal gas adjusting turning plate (116) and an air adjusting turning plate (117) to reduce the opening degree of the air adjusting turning plate (117) and expand the opening degree of the coal gas adjusting turning plate (116), and then performing the step S53;
s52, adjusting a coal gas adjusting turning plate (116) and an air adjusting turning plate (117), expanding the opening degree of the air adjusting turning plate (117), reducing the opening degree of the coal gas adjusting turning plate (116), and then performing S53;
s53, after K reversing periods of the heat accumulating type coke oven system, measuring the temperatures of the small gas flue (109) and the small air flue (110) by using the temperature measuring device again, and returning to the step S40, wherein K is a positive integer.
2. A method for measuring and regulating the temperature of a thermal storage chamber according to claim 1, characterized in that the temperature measuring device comprises a thermocouple or a disk thermometer.
3. The method for temperature measurement and regulation of a thermal storage chamber of claim 2, wherein the detailed step of step S11 comprises:
and S12, inserting the temperature measuring device into the small flue temperature measuring hole (113).
4. The method for measuring and adjusting the temperature of the thermal storage chamber according to claim 1, comprising the following steps before step S11:
s10, performing suction uniformity adjustment on the tops of the gas regenerator (105) and the air regenerator (106).
5. A method for measuring and regulating the temperature of a thermal storage chamber according to claim 1, characterized in that the first temperature is-10 ℃.
6. A method for measuring and regulating the temperature of a thermal storage chamber according to claim 1, characterized in that the second temperature is 10 ℃.
7. A method for measuring and regulating the temperature of a thermal storage chamber according to claim 1, characterized in that the third temperature is 20 ℃.
8. A method for measuring and regulating the temperature of a thermal storage chamber according to claim 1, wherein the fourth temperature is 30 ℃.
9. A method for sensing the temperature of a regenerator as claimed in any of claims 1-8 wherein the number N of commutation periods is 2 or 3.
10. A method for sensing the temperature of a regenerator as claimed in any of claims 1-8 wherein the number K of commutation periods is 2 or 3.
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