UA50580C2 - A method for diagnostics of hydraulic state and coke oven heating gas combustion conditions - Google Patents

Abstract

The invention relates to the chemical recovery industry for diagnostics of coke batteries condition. The method includes serial measuring discharging and products composition indices in sole channels, and on their basis hydraulic condition and conditions of heating gas are predetermined. In addition, discharge indices on upward and downward flows in the zone of 2-3 verticals of every heating wall of coke oven are in addition measured, at that this measurement is performed at the level of 1/3-2/3 of the sole channel height.

Description

The movement of gas flows in the heating system of the coke oven occurs according to the following scheme. Air is supplied to all feed channels 5 operating on the upward flow through gas-air valves.

After passing through the floor channels 5 and regenerators 4, the air enters the vertical channels 14 of the heating walls 2, where the heating coke gas is supplied through the nozzle channels 11. When heated by blast furnace gas, its supply scheme is similar to the air supply (floor channel 5, regenerator 4, oblique walks 3).

Combustion products through the overflow window 15, which is located between adjacent verticals 14, enter the verticals 14 working on the downward flow. Further, the combustion products along the diagonal paths Z enter the regenerator 4, the feed channels 5 and through the gas-air valves 6 are sent to the furnace 7, 8 and then to the chimney 9.

The movement of gas flows in each heating element of the coke oven after a certain period of time (usually 20 minutes) changes to the opposite. At the same time, the bottom channel 5, which worked on the upward flow and through which air for combustion arrived, after changing the direction of the gas flows, works on the downward flow, and the combustion products are removed through it and sent through the gas-air valve 6 and bors 7 and 8 to the chimney 9.

The main condition for the normal operation of a coke oven is to ensure a rational mode of burning heating gas and maintain a sufficient level and uniformity of temperature distribution along the length and height of the heating walls 2. For this, it is necessary to ensure the necessary distribution of heating gas vertically 14 and the optimal ratio of excess air, which is possible only with maintenance of the appropriate hydraulic regime in the heating system of the coke oven. Figure 5 shows data showing the distribution of discharges on the upward and upward flows of heating gas and combustion products, respectively, characterizing the hydraulic mode of the heating system of the coke oven.

The method of diagnosing the hydraulic mode and burning conditions of the coke oven heating gas in accordance with the proposed invention was carried out as follows.

In coke ovens with a lower supply, measurements of the discharge indicators and the composition of combustion products in the bottom channels 5 on both the upward and downward flows, in the zone of the 2nd-3rd verticals 14 of each heating wall of the coke oven at the level of 1/3-2 /3 of the height of the feed channel 5. On the basis of the obtained data, a conclusion was made about the state of the hydraulic regime and the conditions for burning the heating gas in the coke oven. The distribution of the necessary volumes of air and heating gas (on the upward flow) and combustion products (on the downward flow) along the length of the floor channel 5, regenerators 4 and verticals 14 of the heating peak 2 was ensured by maintaining the necessary hydraulic regime for discharge in the floor channels 5. Regulation distribution of the heating hook along the verticals 14 and control of the burning torch was carried out with the help of adjustment devices (not shown in the drawings).

To determine the conditions of heating gas combustion and to choose a rational ratio of excess air, samples were taken of the composition of combustion products in the area of gas-air valves 6, as well as along the entire length and height of the feed channels 5. It was established that the ratio of excess air in the area of gas-air valves 6 was 1.3 -1.5 times higher than in the feed channels 5. This is due to significant air absorption in the areas of the outer walls of the regenerators 4, gas-air valves 6, etc.

In order to ensure reliable control of the burning conditions of the heating gas, the coefficient of excess air in the floor channels 5 in the zone of the 2nd-3rd verticals of each heating block 2 from the machine and coke side of the furnace was determined.

When determining the composition of combustion products at different heights of the floor channel 5, it was established that when measurements were made at a height of less than 1/3 of the height of the floor channel 5 (less than 140 mm from the base of the floor channel 5), the coefficient of excess air has exaggerated values; at a height of more than 2/3 of the height of the floor channel 5 (more than 420 mm from the base of the floor channel), the composition of the combustion products in the zone of the 2-3rd verticals of each heating wall 2 pours on the coefficient of excess air.

When measuring the discharge in the floor channels 5 through gas-air valves 6, the indicators of the composition of the combustion products were significantly influenced by seepage in the zone of the extreme verticals 14 and the condition of the floor channels 5. When seepage due to leaks in the masonry in the zone of the extreme verticals 14, as well as in the case of local resistances on beginning of the feed channels 5, the established hydraulic mode characterized the mode of extreme verticals 14 to a greater extent than the hydraulic mode of the heating wall of the coke oven as a whole.

Example. Diagnostics of the condition of the masonry of the heating system of the coke battery 1 "bis" TO "Zaporozhkoks" were carried out. The indicators obtained as a result of measurements are given in tables 1, 2, which are provided to this description.

When diagnosing the hydraulic regime and conditions of heating gas combustion, it was established that the resistance of the heating system of the investigated coke battery is 1.5-2 times higher than the design calculation data. This is due to the unsatisfactory condition of the masonry of the heating system and feed channels 5, as well as significant seepage, mainly in the zone of the sliding seam 10.

According to the results of the measurements, the hydraulic mode and conditions of heating gas combustion in the selected heating blocks 2 were determined based on the discharge indicators in the corresponding feed channels 5. At the same time, a comparison of the obtained data with the results of measurements in the area of the gas-air valves 6 made it possible to determine the iodine channels 5 with significant resistances in the zone 2- 3rd verticals 14, namely the 15th, 28th, 36th, 65th - on the machine side, as well as the 16th, 45th, 57th, 66th - on the coke side ( see Table 1).

Diagnostics of the hydraulic regime and the conditions of heating gas combustion was carried out by sequentially measuring the discharges in each floor channel 5 in the zone of the 2nd-3rd verticals 14 of each heating block 2 on the upward and downward flows at the level of 1/3-2/3 of the fallen floor cable 5 ( see Table 2). At the same points on the downward flow, the compositions of combustion products were studied and the coefficient of excess air was determined.

Fig. 5 shows the distribution of discharges obtained as a result of diagnostics in the heating wall of the coke oven. According to the rules of technical operation, the deviation of the discharge indicators in all channels from the control (which was chosen as the 38th channel) should not exceed 5-7 Pa, depending on the service life of the coke battery. The optimal ratio of excess air in all feed channels 5 should be 1.5--0.2.

Table 1 shows the results of measurements of the discharge indicators on the up and down flows from the machine and coke sides of battery I "bis" ODO "Zaporozhkoks" according to the traditional method (in the zone

Code of Civil Procedure) and according to the proposed method. Also given here are the coefficients of excess air c, which are determined by the composition of combustion products in the HPP zone and according to the proposed method.

The obtained results show a significant difference in both the hydraulic regime and the coefficient of excess air: the average values of the discharge indicators differ by 7-10 Pa, the coefficient of excess air - by 0.44-0.47. At the same time, in individual feed channels (from the machine side - 15th, 28th, 36th, 65th; from the coke side - 16th, 45th, 57th, 66th) the difference reaches 17Pa , which indicates the presence of local resistances at the beginning of the corresponding feed channel 5. The coefficient of excess air in individual feed channels 5 (from the machine side - 15th, 28th, 36th, 37th, 46th, 58th ; on the coke side - 16th, 46th, 57th, 66th) differs by 1.33-1.43 times. Moreover, according to the traditional method, the coefficient of excess air in all measured feed channels 5 exceeded the data obtained by the proposed control method in the zone of the 2nd-3rd verticals 14 of each heating block 2 on the ascending and descending chase on the trough 1/3-2/3 of the height channel 5, which indicates the presence of significant leaks in the heating system in the area of extreme verticals 14.

Table 1 me | Rarefaction of Pa. | 77 | Riznizhnyapa.d//:/G/| -- b podovogo/ ZNYZHH stream | High flow | | | Niskhpotik | Vyshpoib | | U.S

Code of Civil Procedure Code of Civil Procedure Code of Civil Procedure Code of Civil Procedure Code of Civil Procedure Code of Civil Procedure method method method method method method method 715 | 148 | 134 | 73 | 83 | 202 | 152 | 150 | 745 | 86 | 95 | i,/2 | 148 716 | 7146 | 7142 | 76 | 86 | 196 | 148 | 154 | 139 | 87 | 98 | 2 lo | t 28 | 149 | 132 | 78 | 89 | 212 | 162 | 146 | 140 | 84 | 90 | 1.94 | 157 37 | 139 | 129 | 88 | 90 | 215 | 1650 | 152 | 146 | 79 | 85 | 1.86 | 157 38 | 141 | 136 | 82 | 85 | 194 | 1.56 | 14.5 | 142 | 86 | 91 | 1.80 | 7.54 | 143 | 134 | 86 | 88 | t86 | T,51 | 156 | 7142 | in | 88 | 1.73 | 150 46 | 145 | 140 | 84 | 86 | 201 | 153 | 149 | 146 | 76 | 86 | glo | 71.55 58 | 147 | 138 | 80 | 87 | 214 | 1.55 | 142 | 139 | 78 | 82 | 1.87 | 7.53 65 | 149 | 135 | 79 | 90 | 187 | 7.53 | 147 | 7142 | 80 | 93 | 1.96 | 152 66 | 148 | 139 | 77 | 86 | 188 | i61 | 158 | 143 | 79 | 90 | gla | Te shien" cre re ev |n iv meaning| 145 136 78 87 1.99 1.55 149 142 81 91 1.90 1.53 values

Table 2 not s, The coefficient of excess air in the chop 2-3rd vertical at levels, in mm from the bottom "o-muserticles | ZMenshel/heights | /Z-o/Heights | More/Z height sok dlrletye ge

M deftly picked up the shadow and used it

Kin s: nie! !

It's worth it

More; With - ! S Also -- as I V, PM in ESHEPYA : a dO i em SHOK M km | Shen b Otrain- - MIS Do vo anna con EN she

Cheek | ekt es ev No, -Z I : i i DAVAV Oh PV Vovk pi

THOSE days -- ! rec 5 b o nrzhnv es "Zh tet I pi: nen that le NE ITe y. p

NO |; OM MM Ah y No I | : rota tek detrit U Zhe tya vt t Y k, i sya i s m svy sche shy s y dy ny and SVK" m neschiv sbstvnoi EARLY si is: m MY mentation I pedkYn t still tav s o which Velo yatetuo in "hny B.

B and Se pat a with y. at; niv is Yi and -shey Kv vyko i; sno NI and | RE V. pygieniea v. Y. t! Fairy pt aty in pieces ut uyu SrAIE ih EE e Y t

OB ps o i u oo a rattna

Eh, I am

Annexation of VENIA and V: MK KTK Na ee still shi p - AB AV VED YATI VT AN

She en nen and in nn zh she and I ; . kuki kn la: she Nv shen V ME Av Ves Nv is eV o BY: shi shvy anenin ie na nev

Ai NIKY nin mini nanny el. to her -- NM NI KN V I PV I OY p: seni neneivynyi niny ek -

I who write with BE. and : t,

I STARTED ECO s

Z i yaninanneneininvennennyvnyk tin. SK AN eV SAD ram om oda finiv yuyu kt o to we: . The dream and the tires are the same, we are on the NK NK VA JANV mch o kt ! EN kyu o

S I ME VN U KON.OYA VOK OVO I Y KK TK Bo OK in still "V. with I KTK : ; synenm I. NIK NOV NOYA I. I N nene DV Z Kf, : " Ra ZK I I KONYA and KONYA I RYAA Kn o V ak -

KM. y THANKS AS OY) OM oh I in y V NA KN I KK roya SO. va B NV VU SYA Kor 5. vin p i I SSs . There is Seret ee VN NYA and: "fir,y | ! pi

A-A about rlzhUulE UtuTV

PO OO

DI E, ; IN BA 5TH SHYN

AD NT | yes and; sh!

WHAT and - || | She drove

A 1 1 z-KT I and in and 1 5 is and (where dos d ks sv slv na rt

IL C is in BC II EE I . Mk et naAI 4 I romen MAYA PO MON

Fito V

DECADES OF ELECTRONIC WATT I AK DNA WHAT A | ! These are these

OT rNA t i Le TYA sh o Te Tit TSI p z. Te shchi SCHI i z Y | DREAMS Not yet. How would you like to be the best of the world: "Daily

IN SHY hi Esslk' "INNY NN NA BB and p "V 4 Y | That Meiinny FTOOJU Haktobo durok : y ka D- і shk E - and a Ж u mn Z DEYAV.

GI management

With still m DIA pah INNA dak eV

She kn then I and- -x and

OK and SHE 280 1270007

And | eat

And that's it

CHE - roar; sha, mice AN sei plow Zhevae KDD MO MY PPR OD OO MV sho pes ooo 0 Ba i oi si I ig.5 i x - mIepy of measurement o