EP0107878A1 - Coke oven battery - Google Patents
Coke oven battery Download PDFInfo
- Publication number
- EP0107878A1 EP0107878A1 EP83201442A EP83201442A EP0107878A1 EP 0107878 A1 EP0107878 A1 EP 0107878A1 EP 83201442 A EP83201442 A EP 83201442A EP 83201442 A EP83201442 A EP 83201442A EP 0107878 A1 EP0107878 A1 EP 0107878A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- roof
- sections
- conduits
- coke oven
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
- C10B41/08—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke for the withdrawal of the distillation gases
-
- 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
- C10B29/00—Other details of coke ovens
- C10B29/06—Preventing or repairing leakages of the brickwork
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
- Secondary Cells (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
- The present invention relates to a coke oven battery.
- Coke oven batteries are known having a plurality of substantially horizontal coking chambers and an oven roof. The oven roof has a plurality of vertical conduits e.g. for inspection, for the removal of coke-oven gas, and for charging the battery. The majority of the oven roof is constructed from masonry and the joints-between the masonry open and cracks develop when the coke oven battery is fired and also during operation of the battery. This leads to the problem that coke oven gas produced during operation of the battery leaks from the coking chambers in the battery to the exterior of the battery or to the combustion system of the battery through the open joints and cracks in the roof.
- Gas leakage occurs by coke oven gas, formed during the coking process, leaking into the oven roof from:
- (i) the coking chambers,
- (ii) the conduits (usually called "ascension pipes") in the oven roof for the removal of coke-oven gas;
- (iii) the charging conduits in the oven roof.
- Convection of the coke-oven gas causes the temperature of the oven roof to increase and combustion of the gas in the roof (such combustion being known as "inner fires") damages the brickwork. The tie rods installed in the roof become too hot and the tensile force they exert decreases, reducing their effectiveness. The upper parts of the roof usually contain porous insulation bricks and the hydrocarbons in the coke-oven gas condense in these bricks, reducing their insulative effect. Coke-oven gas may also pass through the roof to the combustion system of the battery, leading to incomplete combustion and sooting of the chimneys. Coke-oven gas leaking to the atmosphere causes pollution of the environment.
- It is also possible for combustion gas to leak from the combustion system, especially from the inspection conduits extending vertically through the oven roof, into the oven roof itself and from thence to the atmosphere.
- Leakage of coke-oven and combustion gas results in less efficient and hence less economic performance and also makes operation of the battery more difficult. The leakage results in degeneration of (parts of.) the oven roof making repairs necessary.
- As has been mentioned, tie rods are sometimes provided in the roof, which exert compressive forces on the lateral edges of the roof. This may reduce the amount of gas leakage but its effect is extremely limited and is useless in combatting localised leaks.
- It is known from e.g. Dutch Patent Application 8101060 to coat the exterior of the lateral edges of a coke oven battery with metal foil. Such an exterior coating is impractical for use on the oven roof as it would be damaged too easily. It also could not prevent gas leakage from one part of the battery to another.
- The present invention seeks to eliminate, or at least reduce, the problem of gas leakage in the oven roof. It does this by providing a gas-tight screen in the roof. The screen has substantially horizontal sections extending between the vertical conduits in the roof, and substantially vertical sections adjacent the vertical conduits. The substantially horizontal sections limit the spread of gas from the coking chambers and the substantially vertical sections limit the spread from the conduits. The substantially vertical sections also help to stop gas leakage to the combustion systems.
- The screen is preferably made of a plurality of metal sheets.
- The substantially vertical sections of the screen should preferably be designed so that they extend to a point at or adjacent the top of the oven roof. In order to prevent leakage from the top of the screen near the openings of the conduits, the top of the substantially vertical sections should preferably be constructed so that they form a gas-tight seal with moulded bricks which restrict the conduits. This may be achieved by casting in concrete a stepped portion of the vertical sections to the moulded bricks.
- Where there are a plurality of closely spaced conduits, a simple screen construction may be obtained by combining the vertical sections near to these conduits to form a common vertical screen section.
- In order to improve the gas-tight sealing of the screen, the substantially horizontal sections preferably comprise two separate horizontal layers spaced vertically apart.
- Where the oven roof consists from bottom to top of a number of courses of silica and/or chamotte bricks, and several courses of refractory insulation bricks, at least the substantially horizontal sections of the screen should preferably be installed in the section containing the porous refractory insulation bricks.
- Preferably tie rods are provided in the roof, such that the screen is between them and the coking chambers. This prevents gas leaking to the tie rods to reduce the risk of their tensile stress being reduced by overheating.
- An embodiment of the invention will now be described, by way of examples with reference to the accompanying drawings in which:
- Figure 1 is an elevation of a coke-oven battery on the oven roof;
- Figure 2 shows a vertical transverse section of the oven roof according to arrow II-II in Figure 1;
- Figure 3 shows a vertical longitudinal section along the line III-III in Figure 1;
- Figure 4 shows a vertical transverse section of the part marked IV in Figure 2, on a larger scale;
- Figure 5 shows a vertical longitudinal section of the part marked V in Figures 3 in a larger scale, and
- Figure 6 shows a vertical longitudinal section along the line VI - VI in Figure 1.
- In Figs. 1, 2 and 3 a coke-oven battery has
horizontal coking chambers 2 and anoven roof 3. The temperature in thecoking chambers 3 during operation of the battery is approximately 800°C. Theoven roof 3 is in most cases designed as a brickwork structure, and is approximately 1 metre thick. Combustion walls 4 are provided betweenadjacent coking chambers 2, each wall 4 comprising a number ofcombustion chambers 5. During operation, the temperature in thecombustion chambers 5 is approximately 1350°C. A large number ofvertical inspection conduits 6 are provided inoven roof 3, which conduits open into thecombustion chambers 5. At least one ascension conduit 7 for coke-oven gas is provided in theoven roof 3 for each coking chamber. In most coke-oven batteries a plurality e.g. four, chargingconduits 8 are also provided in the oven roof for coking coals.Inspection conduits 6 andcharging conduits 8 are sealed with covers during operation. - During operation coke-oven gas penetrates open joints and cracks in oven roof 3 (see Figure 2) at
arch 9, ascension conduit 7 andcharging conduits 8, in the direction shown byarrows 10. This gas seeks an exit to the atmosphere through the oven roof, in the direction ofarrows 11, or finds its way, under certain conditions through the inspection conduits 6 to the combustion system, as shown by arrows 12. Under other conditions combustion gas also penetrates the oven roof atinspection conduit 6 in the direction of arrows 27, whereupon the combustion gas also seeks an exit to the atmosphere in the direction ofarrows 11. - In Figures 4 and 5 the present invention is shown in a common oven roof design, namely one in which the roof consists of a
brickwork structure 13 in which are providedvertical inspection conduits 6 andcharging conduits 8, formed bymoulded bricks 14. Many variants of the embodiment of the invention according to the example are conceivable to the skilled man, all of which lie within the scope of the present invention. - A gas-
tight screen 15 is installed between thevertical conduits screen 15 comprises substantially horizontal and substantiallyvertical sections metal sheets 16, the substantiallyhorizontal sections 17 extend between the conduits, and the substantiallyvertical sections 18 are adjacent theconduits - The
metal sheets 16 are installed in the joints ofbrickwork 13. A good structure for example, is one in which the metal sheets are 0.05-0.25 mm thick, and consist of oxidation-resistant alloy steel foil, the material of which has the following composition: 15-30% Cr, 5-25% Ni and 0-10% Mo. Sheets of fixed dimensions or sections which are taken up from a coil, in widths of 60 or 90 cm, for example, are used for producingscreen sections - The sheets can be installed not only when constructing a new coke-oven battery, but can also be used in an existing oven roof, after parts of it have been demolished.
- The substantially
vertical sections 18 extend from close to the top of the oven roof. The substantiallyvertical sections 18 of thescreen 15 prevent gas from penetrating the brickwork, pastvertical screen sections 18 in the direction ofarrows 10, at thevertical conduits horizontal sections 17 of thescreen 15 prevent the conveyance to the atmosphere of gas which has penetratedoven roof 3 fromarch 9 ofcoking chambers 2. The substantiallyhorizontal sections 17 also prevent leakage into the atmosphere of gas which is forced along the bottom of the substantiallyvertical sections 18 of thescreen 15 past these sections and into the brickwork, for example, if these sections are affected by a high temperature. The substantially vertical sections close toinspection conduits 6 also prevent the discharge of gas which has penetrated the brickwork underneath the substantially horizontal sections l7 of thescreen 15 via the inspection conduits and into the combustion system. - In order to prevent leakage into the atmosphere at the top of the
conduits bricks 14 and the substantiallyvertical sections 18 of thescreen 15, the substantiallyvertical sections 18 of the screen are arranged so that they form a gas-tight connection with mouldedbricks 14, by bringing these sections into contact with the moulded bricks atpoint 19, and preferably casting the structure thus formed in refractory concrete. The moulded bricks at the top of the vertical conduits are, in most cases, recessed slightly in relation to the moulded bricks underneath them. Thus for a gas-tight connection with the top moulded bricks, a steppedtop section 20 of thevertical sections 18 is desirable. This steppedtop section 20 is considered to form part of thevertical section 18 of thescreen 15, so that thesesections 18 are referred to as substantially vertical sections although they may not be vertical over their entire length. - The
inspection conduits 6 of a combustion wall are installed in a row as shown in Figure 1 in conventional coke-oven battery design, and are located close to each other. Although it is possible to install substantially vertical sections in the oven roof round each inspection conduit 6 a simple structure is obtained by combining the substantially vertical sections close to a row of inspection conduits to form two substantiallyvertical sections 21 close to and on each side of the row ofinspection conduits 6. - In the structure according to the invention, gas which has penetrated the brickwork accumulates underneath the substantially
horizontal sections 17. The penetration of this gas through one or more substantially horizontal sections as a result of defects in those sections will again cause considerable leakage. Therefore the horizontal screen sections should preferebly be constructed with two separatehorizontal layers 28 of metal sheets, spaced vertically apart. - In a conventional design, the oven roof comprises, from bottom to top, firstly a plurality of courses of
silica bricks 22, close to thecoking chambers 2 and thecombustion chambers 5, possibly a plurality of courses ofchamotte bricks 23 and several courses of porousrefractory insulation bricks 24. As shown in Figures 4 and 5, at least thehorizontal sections 17 of thescreen 15 should preferably be installed in the part of the roof containing the porous refractory insulation bricks. - The gas-
tight screen 15 shown in Figure 6 is basically the same as that shown in Figures 4 and 5, although the screen is of a much simpler design because between thevertical inspection conduits 6 and the chargingconduits 8 the roof consists substantially of mouldedbricks 14 only, so that there is much less room available for the screen to be installed in theroof 3. As before thescreen 15 has substantiallyhorizontal sections 17 and substantiallyvertical sections 18 formed from metal sheets. Thescreen 15 is arranged to form a gas-tight connection with the moulded bricks at the top ofconduits vertical sections 18 of thescreen 15 close to a row of inspection conduits are combined to formvertical sections 21 close to and on each side of the inspection conduits. - The substantially
vertical sections 21 shown in Figure 6 are arranged to be substantially in line with the vertical parts of the steppedtop sections 20 shown in Figure 5. Likewise the substantiallyhorizontal sections 17 at the screen shown in Figure 6 are arranged to be substantially in line with the horizontal parts of the steppedtop sections 20 shown in Figure 5. In this preferred embodiment of the screen the tie rods are installed in that section of the oven roof on the opposite side of thescreen 15 from the coking chambers so that thetie rods 25 are protected from temperature increases due to gas leakage. The tie rods may be provided with additional protection against temperature increases by means of thermal insulatingmaterial 26 installed in the screened section of the oven roof. - In addition the stepped
sections 20 of the substantiallyvertical sections 18 shown in Figure 5 may be provided with additionalvertical parts 29 to form channels 30 (see Figure 1) for thetie rods 25 which channels extend substantially the entire length of the tie rods in the roof, the channels consisting of steppedsections 20 andadditional sections 29 in Figure 5 and ofsections vertical parts 29 are also provided with thermal insulatingmaterial 26, so that the tie rods are fully sealed and insulated from the oven roof.
and/or
Claims (11)
characterised in that
the roof contains a gas-tight screen (15) the screen having substantially horizontal sections (17) extending between the conduits (6,7,8) and substantially vertical sections (18) adjacent the conduits (6,7,8).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83201442T ATE17019T1 (en) | 1982-10-29 | 1983-10-07 | COKE OVEN BATTERY. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8204187 | 1982-10-29 | ||
NL8204187A NL8204187A (en) | 1982-10-29 | 1982-10-29 | COOK OVEN BATTERY. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0107878A1 true EP0107878A1 (en) | 1984-05-09 |
EP0107878B1 EP0107878B1 (en) | 1985-12-18 |
Family
ID=19840489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83201442A Expired EP0107878B1 (en) | 1982-10-29 | 1983-10-07 | Coke oven battery |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0107878B1 (en) |
JP (1) | JPS5993789A (en) |
KR (1) | KR860000285B1 (en) |
AT (1) | ATE17019T1 (en) |
CA (1) | CA1227766A (en) |
DE (1) | DE3361571D1 (en) |
ES (1) | ES8406532A1 (en) |
NL (1) | NL8204187A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113583688A (en) * | 2021-07-15 | 2021-11-02 | 中国一冶集团有限公司 | Coke oven combustion chamber inflation sealing device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6418139U (en) * | 1987-07-24 | 1989-01-30 | ||
JPH0776339B2 (en) * | 1988-05-24 | 1995-08-16 | ルールコーレ アクチエンゲゼルシヤフト | Coke oven ceiling |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE515538C (en) * | 1928-08-19 | 1931-01-07 | Arthur Killing | Cover for coke stoves |
DE512334C (en) * | 1927-11-22 | 1931-02-13 | Koksofenbau U Gasverwertung A | Coke oven |
US2216983A (en) * | 1937-10-16 | 1940-10-08 | Fuel Refining Corp | Underfired coke oven |
EP0060005A2 (en) * | 1981-03-05 | 1982-09-15 | Hoogovens Groep B.V. | Horizontal coke-oven battery |
-
1982
- 1982-10-29 NL NL8204187A patent/NL8204187A/en not_active Application Discontinuation
-
1983
- 1983-10-07 EP EP83201442A patent/EP0107878B1/en not_active Expired
- 1983-10-07 AT AT83201442T patent/ATE17019T1/en not_active IP Right Cessation
- 1983-10-07 DE DE8383201442T patent/DE3361571D1/en not_active Expired
- 1983-10-19 KR KR1019830004966A patent/KR860000285B1/en not_active IP Right Cessation
- 1983-10-19 CA CA000439297A patent/CA1227766A/en not_active Expired
- 1983-10-28 JP JP58201147A patent/JPS5993789A/en active Granted
- 1983-10-28 ES ES526852A patent/ES8406532A1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE512334C (en) * | 1927-11-22 | 1931-02-13 | Koksofenbau U Gasverwertung A | Coke oven |
DE515538C (en) * | 1928-08-19 | 1931-01-07 | Arthur Killing | Cover for coke stoves |
US2216983A (en) * | 1937-10-16 | 1940-10-08 | Fuel Refining Corp | Underfired coke oven |
EP0060005A2 (en) * | 1981-03-05 | 1982-09-15 | Hoogovens Groep B.V. | Horizontal coke-oven battery |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113583688A (en) * | 2021-07-15 | 2021-11-02 | 中国一冶集团有限公司 | Coke oven combustion chamber inflation sealing device |
Also Published As
Publication number | Publication date |
---|---|
CA1227766A (en) | 1987-10-06 |
KR860000285B1 (en) | 1986-03-26 |
JPS5993789A (en) | 1984-05-30 |
KR840006822A (en) | 1984-12-03 |
NL8204187A (en) | 1984-05-16 |
ES526852A0 (en) | 1984-08-01 |
DE3361571D1 (en) | 1986-01-30 |
ES8406532A1 (en) | 1984-08-01 |
EP0107878B1 (en) | 1985-12-18 |
ATE17019T1 (en) | 1986-01-15 |
JPS6213392B2 (en) | 1987-03-26 |
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