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Method for heating and controlling temperature of coke oven

A coke oven and coking technology, which is applied in the heating of coke ovens, coke ovens, auxiliary controllers with auxiliary heating devices, etc., can solve energy waste, affect the service life of coke ovens, and cannot measure temperature on time, advance or delay 1 minute wait

Inactive Publication Date: 2012-06-27
TAIYUAN COAL GASIFICATION +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country's coking production technology is still relatively backward, and the production mode of most enterprises is still extensive. The coke oven heating process has always been dominated by manual operation. Adjusting the coke oven heating at high temperature, the adjustment effect cannot be guaranteed, which will easily lead to a decrease in coking efficiency and quality, waste of energy, and even affect the service life of the coke oven
The specific problems are: 1) The standard temperature is determined by the craftsman based on the production experience. In order to avoid coke, the general standard temperature is set too high, and the energy consumption is bound to be too high; 2) The temperature at the bottom of the vertical flue is not evenly distributed. Different people choose different measurement points, which have a great influence on the measurement results; 3) The temperature at the bottom of the vertical fireway changes with time. Although the measurement time of the straight-line temperature is stipulated to be carried out five minutes after the change of direction, it is strictly enforced There are still certain difficulties, one is insurmountable, such as the temperature measurement can not be punctual due to the influence of coal loading and coke pushing operation, and the advance or delay of 1 minute often affects ±4~6oC. In addition, artificial randomness, such as clock time 4) Due to the large fluctuations in the pressure of the returned furnace gas, the flow rate of the heating gas entering the coke oven machine side and the coke side fluctuates greatly, making it difficult to ensure a reasonable air / fuel ratio for coke oven heating, and the energy consumption is bound to be large , it is necessary to further improve the suction of the flue

Method used

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  • Method for heating and controlling temperature of coke oven
  • Method for heating and controlling temperature of coke oven
  • Method for heating and controlling temperature of coke oven

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Take the JN60 coke oven as an example, with 50-hole carbonization chamber and 51-hole combustion chamber, and set the empirical coking index parameter of the coke oven as K 0 =1.4.

[0046] 1) In the first coking cycle, first set an empirical standard temperature T f =1200°C is the coking temperature for coking, and the coking index parameters K of 50 carbonization chambers of the coke oven are respectively detected 1 ~K 50 , and get the average coking index parameters of 50 carbonization chambers 1 (The test results are shown in Table 1, where τ c1 =24h), then correct the empirical standard temperature, and finally get the first standard temperature T of the coke oven s1 : T s1 = T f +10.24×τ c1 ×(1 / 1 -1 / K 0 ) = 1200+10.24×24×(1 / 1.53-1 / 1.4) = 1200-14.7=1185.3℃, which is the empirical standard temperature T f The standard temperature of the coke oven is 1185.3°C when it is lowered by 14.7°C.

[0047] Table 1 The coking index parameters of each carbonizat...

Embodiment 2

[0056] Embodiment 2 is similar to Embodiment 1, the difference is that the empirical standard temperature T set in the first coking cycle in Embodiment 2 f =1300℃, set the empirical coking index parameter of the coke oven as K 0 =1.2. When detecting the temperature of the vertical flue, two groups of combustion chambers are detected on the machine and the focal side, that is, 10 combustion chambers are detected on the machine and the focal side, and each group of combustion chambers is a compartment detection. The serial numbers of the tested combustion chambers are respectively:

[0057] Machine side (10, 12, 14, 16, 18), (43, 45, 47, 49, 51);

[0058]Focal side (11, 13, 15, 17, 19), (40, 42, 44, 46, 48).

[0059] All the other steps and methods are the same as in Example 1.

Embodiment 3

[0061] Embodiment 3 is similar to Embodiment 1, except that the empirical standard temperature T set in the first coking cycle in Embodiment 3 f =1250℃, set the empirical coking index parameter of the coke oven as K 0 =1.7. When detecting the temperature of the vertical flue, all the combustion chambers of the whole furnace are detected, that is, 51 combustion chambers are detected. All the other steps and methods are the same as in Example 1.

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Abstract

The invention relates to a method for heating and controlling temperature of a coke oven, which comprises the following steps: (1) detecting temperature of untreated gases of each coking chamber at a first coking period, obtaining an average coking index parameter 1 of the whole oven, and revising to obtain standard temperature Ts1 of the coke oven through the 1; (2) using the Ts1 as a standard temperature set value of a second coking period at the second coking period, measuring flue temperature to obtain an average flue temperature of the whole oven, determining heating coal gas flux so as to adjust temperature of the coke oven according to a deviation between the average flue temperature of the whole oven and the Ts1; and (3) detecting temperature of untreated gases of each coking chamber at the second coking period, obtaining an average coking index parameter 2, revising the Ts1 through the 2 to obtain standard temperature Ts2, using the Ts2 as a standard temperature set value of a third coking period, and processing later coking periods in the same manner. According to the method, the stability of the coke oven and coke quality index can be improved; and the system has low investment and long service life, and has significance in energy conservation and emission reduction of the coke oven, and obvious economic benefits.

Description

technical field [0001] The invention belongs to the comprehensive field of coke oven automation technology, in particular to the technical field of coke oven heating, in particular to a coke oven heating temperature control method. Background technique [0002] my country is a big country in coking production, and there are thousands of large and small coke ovens in the country. The coke oven is a special industrial furnace. It is not only a high-temperature chemical reactor, but also a very large and complex thermal equipment. It has the characteristics of large time delay, large inertia, strong nonlinearity, variable parameters, and multiple disturbances. The coke oven is composed of multiple carbonization chambers and combustion chambers, and each combustion chamber includes a certain number of vertical fire passages, of which every two vertical fire passages are used as a pair to form a gas passage. connected to the heat chamber. Gas and air are mixed and burned in num...

Claims

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Application Information

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IPC IPC(8): C10B21/10G05D23/30
Inventor 赵宝元白小明宁芳青宋旗跃韵金虎王兆文郭军梁太清李永林曾铁兵苏强陈勇郭志军郭宏杰张政宏
Owner TAIYUAN COAL GASIFICATION
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