CS267329B1

CS267329B1 - Tunnel-controlled furnace

Info

Publication number: CS267329B1
Application number: CS88316A
Authority: CS
Inventors: Julius Ing Pazicky
Original assignee: Pazicky Julius
Priority date: 1988-01-18
Filing date: 1988-01-18
Publication date: 1990-02-12
Also published as: CS31688A1

Abstract

Návrh rieši využitie prebytočného tepla v podpecnom priestore tunelovej pece a to vzduchotechnickým zariadením, ktoré v podpecnom priestore gredhrievacieho pásma nasává vzduch a vhána ho do podpscného priestoru páliaceho pásma, odtial’ je distribuovaný pomocou regulačných orgánov do chladiaceho pásma alebo zmiešavacej komory. Příprava sušiaceho média do sušiarne sa koná diferencované v troch zmiešavacích komorách zapojených do série, prlčoni”vél’ký význam sa kladie ovládaniu regulačných orgánov mikropočítačovou technikou na základe nameranýoh hodnůt teplomerov a tlakoměru.The proposal solves the use of excess heat in the under-furnace space of the tunnel kiln by means of an air-conditioning device which sucks in air in the under-furnace space of the core heating zone and blows it into the under-furnace space of the burning zone, from where it is distributed by means of control devices to the cooling zone or mixing chamber. The preparation of the drying medium for the drying chamber takes place in a differentiated manner in three mixing chambers connected in series, therefore great importance is attached to the control of the control devices by microcomputer technology based on the measured values of thermometers and a pressure gauge.

Description

Vynález sa týká tunelovej pece v keramickou priemysle, u ktorej vzduchotechnickým zariadením sa optimalizujú tlakové a teplotně podmienky v podpecnom priestore.The invention relates to a tunnel kiln in the ceramic industry, in which the air-conditioning device optimizes the pressure and temperature conditions in the support space.

Doteraz přebytečné teplo v podpecnom priestore sa využívalo tak, že v bočných stěnách pece bolí vzduchové kanály, ktoré prepéjali tento prlestor s medzistropom pece. V medzistrope bol zmiešovaný s chladiacim vzduchom a ňalej povačšlne využívaný pre sušiaoi proces. Najintenzívnejší odtah vzduchu z podpecného priestoru bol v oblasti páliaceho pásma. Přídavný chladiaci vzduch bol ešte vhéňaný ventilátorem na konci chladiaceho pásma, aby došlo k chladeniu spodnej časti vozíka vychádzajúceho postupné z pece.Until now, the excess heat in the support space has been used in such a way that there are air ducts in the side walls of the furnace, which have intersected this space with the intermediate ceiling of the furnace. In the intermediate ceiling, it was mixed with cooling air and then used for the drying process. The most intensive air extraction from the support space was in the area of the firing zone. Additional cooling air was still blown by a fan at the end of the cooling zone to cool the bottom of the carriage coming out gradually from the furnace.

Nevýhody takéhoto vyhotovenla sú v tom, že teplotně polia podpecného priestoru neboli kontrolované, regulované a preto nemohlo dochádzat k účinnému využitiu tepla z tohoto pries- $ toru. Podpecný prlestor bez vzduchotechnického zariadenia nemohol taktiež vytvárať vhodné tlakové podmienky najma v oblasti predhrievaoieho pásma, preto dochádzalo k vysokému nasávaniu falošného vzduchu, Co zbytočne zhoršovalo tepelnú bilanciu pece.The disadvantages of such a design are that the temperature fields of the support space were not controlled, regulated and therefore no efficient use of heat from this space could take place. The support space without air-conditioning equipment could also not create suitable pressure conditions, especially in the area of the preheating zone, therefore there was a high suction of false air, which unnecessarily worsened the heat balance of the furnace.

Uvedené nevýhody doterajšieho stavu techniky odstraňuje tunelová pec s reguláciou podpecného priestoru podl’a vynálezu, ktorá pozostáva z predhrievaoieho, páliaceho a chladiaceho pásma. Chladiace pásmo je vzduchotechnickým potrubím přepojené cez zmlašavaclu komoru so sušiarňou. Cavý ventilátor je na sacej straně vybavený vzduchotechnickým zariadením, v ktorom sú regulačně orgány podpecného prieatoru predhrievaoieho pásma a na výtlakovej straně regulačně orgóny podpecného priestoru péliaceho pásma. Pravý ventilátor má na sacej straně regulačně orgány podpecného priestoru chladiaceho pásma a na výtlačnej straně je vzduchotechnickým potrubím napojený na regulačně orgány chladiaceho pásma a prvú zmiešavaciu komoru. .The above-mentioned disadvantages of the prior art are eliminated by the tunnel furnace with control of the support space according to the invention, which consists of a preheating, burning and cooling zone. The cooling zone is connected by an air duct through a compressor chamber with a dryer. The suction fan is equipped on the suction side with an air-conditioning device in which the regulating bodies of the support preheater of the preheating zone and on the discharge side are regulating organs of the supporting space of the polishing zone. The right fan has control elements of the cooling zone support space on the suction side and is connected to the cooling zone control elements and the first mixing chamber on the discharge side by air ducts. .

Sušiareň je vzduchotechnickým potrubím napojená na tretiu zmiešavaciu komoru, do ktorej vyúsťujú potrubia zo spal'ovacej komory a druhej zmiešavacej komory. Do druhej zmiešavacej komory vyúsťujú potrubia z prvej zmiešavacej komory a teplovzdušné potrubie z pece. ,The dryer is connected by an air duct to a third mixing chamber, into which the ducts from the combustion chamber and the second mixing chamber open. The pipes from the first mixing chamber and the hot air pipes from the furnace open into the second mixing chamber. ,

Podpecný prlestor je vybavený^- tlakomerom a teplomermi, ktoré sú slektrovodičmi přepojené cez riadiaci systém s akčnými členmi rsgulačných orgánov vzduchotechnického zariadenia.Podpecný prlestor has ^- manometers and thermometers, which are connected via slektrovodičmi control system with actuators rsgulačných authorities HVAC equipment.

Vyhotovením podlá vynálezu sa dosiahne regulovatelně teplotně pole v podpsenom priestore, čo má velký význam pře mobilný mechanizmus pece, jeho konštrukciu, obmedzovanú najma hranicou teplotného zaťaženia. Regulácia teplotného póla má významný dopad i na využitie přebytečného tepla z podpecného priestoru v sušiarni alebo tiež i pijedhreve skládky tovaru. Vzduchotechnickým zariadením v podpecnom prlbetors rieši sa tiež problematika zníženia přebytku vzduchu v dýmových plynoch, ktorý má velký význam na zníženie mernej spotřeby paliva pri výpale tovaru.The embodiment according to the invention achieves a controllable temperature field in the signed space, which is of great importance for the mobile mechanism of the furnace, its construction, limited in particular by the temperature load limit. The regulation of the temperature pole also has a significant impact on the use of excess heat from the support space in the dryer or also on the landfill of the landfill. The ventilation equipment in the support prlbetors also solves the problem of reducing the excess air in the flue gases, which is of great importance for reducing the specific fuel consumption during the firing of goods.

Doterajší zložitý systěm přípravy sušiaceho mědia je pomocou troch sěriove zapojených zmiešavacích komĎr jednoduchší a tým i po regulačne-j stránke zvládnutelný. Zároveň takýmto vyhotovením nedochádza k tak znatelnému poklesu rýchlostnej, rssp. tlakovej zložky u prúdiac'eho média.The hitherto complex system of preparation of the drying copper is simpler by means of three mixing chambers connected in series and thus manageable from a regulatory point of view. At the same time, such an embodiment does not lead to such a noticeable decrease in speed, rssp. pressure component of the flowing medium.

Na pripojenom výkrese je znázorněná funkčná schéma zariadenia. Sušiareň 1. vo velmi významnej miere využívá teplo z chladiaceho pásma 2 tunelovej pece. Tunelová pec je podlá druhu tepelných procesov rozdělená na predhrievacie pásmo 2, páliace pásmo 2 a chladiace pásmu 2, na ktoré je napojené teplovzdušné potrubie 4,. Ako pomocný zdroj dodávky tepla pra sušiareň 1 slúži spalovací·'komora 6,. Odpadný vlhký vzduch zo sušiarne odtahuje sušiarenský ventilátor 2· Z predhrievaoieho pásma 2 pece dýmové plyny odtahuje ventilátor dýmových ply- * nov. Vzduchotechnika v podpecnom priestore je vybaveně levým ventilátorem 9 a pravým ventilátorom 10. Výtlačné potrubie sušiarenskěho ventilátore 2 mé prvý regulačný orgán 11 a f druhý regulačný orgán 12,. Cavý ventilátor 9 má na sacej straně regulačně orgány 13 podpecného priestoru predhrievacieho pásma 2, na výtlačnej straně regulačně orgény 14 podpecného priestoru páliaceho pásma 2· Pravý ventilátor 10 má na sacej straně regulačně orgény 15 podpecnáho priestoru chladiaceho pásma 5 a na výtlačnej straně regulačně orgány 16 chladiaceho pásiiid. Do prvej zmiešavacej komory 17 je napojené potrubie od sušiarenokého ventilátore, 2 ^upněného ventllátora W, do druhej zmiešavacej komory 18 je napojená potrubie z prvej zminňovacej komory 12 a teplovzdušné potrubie 4, do tretej zmiešavacej komory 19 je napojené potruThe attached drawing shows a functional diagram of the device. Dryer 1. uses heat from the cooling zone 2 of the tunnel kiln to a very significant extent. According to the type of thermal process, the tunnel furnace is divided into a preheating zone 2, a burning zone 2 and a cooling zone 2, to which a hot air pipe 4 is connected. The combustion chamber 6 serves as an auxiliary source of heat supply for the dryer 1. Exhaust humid air from the dryer extracts the dryer fan 2 · The flue gas fan extracts flue gases from the preheating zone 2 of the furnace. The ventilation system in the support space is equipped with a left fan 9 and a right fan 10. The discharge line of the drying fan 2 has a first regulating member 11 and a second regulating member 12 ,. The suction fan 9 has on the suction side control elements 13 of the preheating zone support space 2, on the discharge side control elements 14 of the combustion zone support space 2. cooling belt. The first mixing chamber 17 is connected to the pipe from the drying fan, 2 ^{at the} foamed fan W, to the second mixing chamber 18 the pipe from the first mentioning chamber 12 and the hot air pipe 4 are connected, to the third mixing chamber 19 it is connected to the

CS 267329 Bl bie z druhej zmiešavacej i komory 18 a spalovačej komory Meranie teploty v podpecnom priestore zabezpečujú podpecné teploměry 20 predhrievacieho pásma, podpecné teploměry 21 páliaceho pásma a podpecné teploměry 22 chladiaceho pásma 2. Meranie tahu - tlaku zabezpečujú pecný tlakoměr 2T~a~poďpecný tlakoměr 24 uložené v predhrievacom pásma 2 pece. Optimalizáciu podmienok hospodárného využitia tepla zaisťuje riadiaci systém 21· V páliacom pásme 2 sú umiestnené horáky 26.· Sušiareň 2 i předhrievacie pásmo 2 tunelovej pece sú vybavené komínom 27.The measurement of the temperature in the support space is provided by the support thermometers 20 of the preheating zone, the support thermometers 21 of the combustion zone and the support thermometers 22 of the cooling zone 2. Tensile-pressure measurement is provided by the furnace pressure gauge 2T ~ and ~ pressure gauge 24 stored in the preheating zone 2 of the furnace. The control system 21 ensures the optimization of the conditions of economical use of heat. · Burners 26 are located in the burning zone 2. · The dryer 2 and the preheating zone 2 of the tunnel furnace are equipped with a chimney 27.

Činnost zariadenia je nasledovná. Nametané hodnoty tahu -tlaku pecným a podpecnýmtlakomerom 23, 24 sú vyhodnotené a porovnané v riadiacom systéme 25, ktorý pomocou regulačných ’ orgánov 13 zaisťuje žiadanú hodnotu. Podlá konštrukcie pece, tvaru podpecného priestoru ako i technického stavu podpecných vozíkov, tlaková diferencia má byť čo najmenšia, aby nedochádzalo k zbytečnému nasávaniu falešného vzduchu z podpecného do pecného priestoru. Vzduchotechnika na výtlačnej straně 1’avého podpecného ventilátore 2 zaisťuje účinné chladenie podpecného priestoru páliaceho pásma 2 ^a t° regulačnými orgánmi 14. Toto přebytečné teplo je nasávané vzduchotechnickým zariadením pravého podpecného ventilátore 10 a využívané v chladiacom pásme 2 tunelovej pece alebo v sušiarňi 2· Příprava sušiaceho média pre sušiareň 2 ^se koná diferencované a to v troch zmiešavacích komorách 17, 18., 12· Riadiaci systém 25 na základe hodnůt, získaných z teplomerov ako i tlakoměru, pomocou akčných členov na regulačných orgánoch umístněných na vstupe do zmiešavacích komůr 17, 12, 12 zaisťuje správnu teplotu, ako i množstvo potřebného vzduchu pre sušenie.The operation of the device is as follows. The measured values of the draft pressure by the furnace and sub-pressure gauge 23, 24 are evaluated and compared in a control system 25, which ensures the desired value by means of regulating elements 13. Depending on the design of the furnace, the shape of the support space as well as the technical condition of the support carriages, the pressure difference should be as small as possible in order to avoid unnecessary suction of false air from the support space into the furnace space. The air conditioning on the discharge side of the left support fan 2 ensures efficient cooling of the support space of the firing zone 2 ^{and the} control bodies 14. This excess heat is sucked in by the air handling unit of the right support fan 10 and used in the cooling zone 2 of the tunnel kiln or dryer 2. drying medium for drying 2 ^takes place and differentiated in three mixing chambers 17, 18, 12 · 25 control system based on the lot, obtained from thermometers as well as gauge, using actuators to regulatory bodies were placed on the entrance to the mixing Komura 17, 12 , 12 ensures the correct temperature as well as the amount of air needed for drying.

Zariadenie je možné použit v keramickom priemysle, kde prevádzky sú vybavené tunelovými pecami.The device can be used in the ceramic industry, where plants are equipped with tunnel kilns.

Claims

2 CS 26732? B1 is from the second mixing / chamber 18 and the combustor 6. The temperature measurement in the sub-compartment is provided by the supporting thermometers 20 of the preheating zone, the supporting thermometers of the 21-burning zone and the supporting thermometers 22 of the cooling zone 2. furnace pressure gauge 2T ~ and pressure gauge 24 stored in preheating zone 2 furnace. Optimization of the economical heat utilization conditions is ensured by the control system 21 · Burners 26 are located in the firing zone 26. The dryer 2 and the preheating zone 2 of the tunnel furnace are equipped with a chimney 27. The operation of the device is as follows. The measured thrust values of the furnace and support pressure gauges 23, 24 are evaluated and compared in a control system 25 which, with the aid of the regulatory authorities 13, provides the desired value. The design of the furnace, the shape of the supporting space as well as the technical condition of the undercarriages, the pressure difference should be as low as possible so as to avoid unnecessary suction of the charged air from the support to the furnace space. The air duct on the discharge side of the left ventilator 2 ensures efficient cooling of the support zone of the firing zone 2 by the regulating means 14. This excess heat is sucked in by the air handling device of the right ventilator 10 and used in the cooling system 2 of the tunnel furnace or in the driers 2 · Drying medium preparation for dryer 2 is differentiated in three mixing chambers 22, 18, 22 · Baseline control system 25 obtained from thermometers as well as a pressure gauge, using actuators on the regulating elements located at the inlet to the mixer the chambers 22, 11, 19 ensure the correct temperature as the amount of air required for drying. The device can be used in the ceramic industry where the tunnel furnaces are operated. SUBJECT OF THE INVENTION

A space-saving tunnel furnace consisting of a preheating, steaming and cooling zone, which is connected to a drier via a mixing chamber and a control system, characterized in that the left ventilator (9) is on the suction side provided with a ventilation device in which the control organs (13) of the supporting space heating zone (2) and on the discharge side are the control elements (14) of the supporting space-blasting zone (3); the cooling zone (5) and on the discharge side is connected to the cooling zone regulators (16) and the first mixing chamber (17) on the discharge side;

Tunnel kiln according to claim 1, characterized in that the drier (1) is connected to the third mixing chamber (19) by means of a ventilation duct, into which the ducts from the combustion chamber (6) and the second mixing chamber (18) open. , into which the hot air duct (4) emerges from the cooling zone (5) and the duct from the first mixing chamber (17).

3. A tunnel kiln as claimed in claim 1, characterized in that it has a preheating zone (2) equipped with a kiln pressure gauge (23) and a pressure gauge (24) which are connected to the control system (25) through which they are coupled supporting thermometers (21) of the firing zone (3), supporting thermometers (22) of the cooling zone (5) as well as supporting thermometers (20) of the preheating zone (2) with actuators of the regulators. 1 drawing