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1. 发明专利

JPH01277107A METHOD AND APPARATUS FOR CONTROL OF COMBUSTION IN FLUIDIZED-BED TYPE INCINERATOR 失效
公开(公告)号：JPH01277107A
公开(公告)日：1989-11-07
申请号：JP10716588
申请日：1988-04-27
申请人： KOBE STEEL LTD
发明人： KITAO YOSHIAKI , YAMAZAKI KEIICHI , MATSUDA MASAO , TAKEUCHI TORU , ITO TADASHI , TSUNEJIN YASUHIRO , YABE YUKIHIKO
IPC分类号： F23G5/30 , F23G5/50
摘要： PURPOSE:To obtain a fluidized-bed type incinerator capable of suppressing the formation of hexavalent chromium and NOx, by carrying out combustion by specifying the air ratio of fluidizing air supplied into a fluidized-bed type incinerator. CONSTITUTION:The temperature of a sand bed 3 is measured by a sand bed temperature indicating controller 6, and a stabilizing burner control valve 7 is controlled. An exhaust gas G2 from a fluidized-bed type incinerator 2 is led into a cyclone 8, in which it is separated into an incinerated ash AS1 and an exhaust gas G2. The exhaust gas G2 is led into a secondary combustion chamber 9, which is supplied with a secondary air A2 via a flow control valve 10. An exhaust gas G3 from the secondary combustion chamber 9 is led into a heat-recovering equipment 12, an exhaust gas G4 from which is led into an exhaust gas-treating equipment 13. Incinerated ashes AS2 and AS3 discharged from the heat-recovering equipment 12 and the exhaust gas- treating equipment 13 through separation have the possibility of containing hexavalent chromium, so that the ashes AS2 and AS3 are returned into the incinerator 2. With the air ratio of the fluidizing air set to be not more than 1.1, a substantially reducing atmosphere is obtained in the incinerator, whereby oxidation of chromium compounds is restrained, and formation of hexavalent chromium is obviated.

2. 发明专利

JPH024191A TEMPERATURE CONTROL OF SMELTING FURNACE 失效
公开(公告)号：JPH024191A
公开(公告)日：1990-01-09
申请号：JP15377588
申请日：1988-06-21
申请人： KOBE STEEL LTD
发明人： YOSHIGAE TAKEO , SUZUKI TOMIO , KITAO YOSHIAKI , YAMAZAKI KEIICHI , TSUNETAKA YASUHIRO , MATSUDA MASAO , TAKEUCHI TORU , ITO TADASHI
IPC分类号： F27B1/00 , F27B1/26 , F27D19/00
摘要： PURPOSE:To detect a furnace temperature correctly without being affected by downflow slag and control the temperature with excellent accuracy by controlling the supplying amount of fuel for a combustion burner based on the exhaust gas temperature of a smelting furnace for smelting thrown-in metal to be smelted in a high-temperature combustion chamber. CONSTITUTION:A temperature sensor 13, such as a thermocouple or the like, is provided at the part of an exhaust gas outlet port 6 for a smelting furnace A to detect the temperature of exhaust gas discharged out of a combustion chamber 1 by the temperature sensor 13. The temperature of the exhaust gas is given as the total amount of the sensitive heat of the exhaust gas generated by the combustion of fuel, the accumulated heat of refractories in the furnace and the like and is related directly to a furnace temperature. The detecting value of the sensor is compared with the value of a preset optimum furnace temperature in a furnace temperature control device 14 and a control signal is outputted to a flow rate regulating valve 12 based on the result of the comparison. According to this method, the opening degree of the flow rate control valve 12 as well as the supplying amount of fuel to a burner 2 are regulated whereby the furnace temperature may be controlled toward the optimum temperature.

3. 发明专利

JPH04313615A METHOD FOR ADJUSTING BASICITY OF INCINERATION ASH IN INCINERATION ASH-MELTING FURNACE 失效
公开(公告)号：JPH04313615A
公开(公告)日：1992-11-05
申请号：JP7989391
申请日：1991-04-12
申请人： KOBE STEEL LTD
发明人： KASAI TOSHIO , MATSUDA MASAO , TAKEUCHI TORU , SUZUKI TOMIO , YOSHIGAE TAKEO
IPC分类号： F23G7/00 , F23J1/00
摘要： PURPOSE:To reduce the cost of fuel for an incineration ash-melting furnace which melts incineration ash discharged from a fluidized-bed type thermal decomposition furnace for incinerating waste. CONSTITUTION:A fluidized-bed type thermal decomposition furnace 1 is connected with an additive-feeding line 1a in a setup to feed a basicity-adjusting agent (a) to the fluidized-bed type thermal decomposition furnace 1 through the additive-feeding line 1a so that together with the basicity-adjusting agent (a) the incineration ash is sent to an incineration ash-melting furnace 4. This method makes the incineration ash mixed well with the basicity-adjusting agent (a) and through adjustment of the basicity of the incineration ash its melting point is effectively lowered. Thus a reduction in the cost of fuel can be achieved in the melting of incineration ash.

4. 发明专利

JPH01234712A PROCESSING UNIT FOR INCINERATION AND COAL ASHES 失效
公开(公告)号：JPH01234712A
公开(公告)日：1989-09-20
申请号：JP6171188
申请日：1988-03-14
申请人： KOBE STEEL LTD
发明人： YOSHIGAE TAKEO , SUZUKI TOMIO , TSUNEJIN YASUHIRO , MATSUDA MASAO , TAKEUCHI TORU , ITO TADASHI , YABE YUKIHIKO , YAMAZAKI KEIICHI , KASAI TOSHIO
IPC分类号： F23J9/00 , F23J1/00 , F23J1/02 , F23J1/08
摘要： PURPOSE:To produce specified secondary products, make effective use of them, and sharply improve their productivity, by maintaining fused slag at a melting temperature, and air-cooling or water-cooling said slag at a specified cooling speed, carrying them continuously. CONSTITUTION:A two phase flow comprising ash and combustion air is arranged to swirl in a melting furnace 1 so as to eject. While swirling, the ash is quickly burnt down, drops by self weight, and flows into the lower part of a furnace body 2, as the fused slag. The fused slag which has thus dropped, flows in a discharge passage 15a of a cinder section 15 and is discharged from a cinder notch 15b. In this manner, the fused slag is collected in a mold 19 through a drop duct 23. The fused slag collected inside the mold 19 is carried by a chain conveyer at a specified cooling speed, solidified by air cooling or water- cooling and received in a slag container 22, where an auxiliary burner 16 is used to blow out flames to the cinder notch 15b. Therefore, the cinder section 15 is heated up to a temperature over the melting temperature of the slag by heat radiation inside the melting furnace 1 and by the heat from the auxiliary burner 16.

5. 发明专利

JPH0391608A TREATMENT OF ASH BY MELTING AND SOLIDIFICATION 失效
公开(公告)号：JPH0391608A
公开(公告)日：1991-04-17
申请号：JP22886989
申请日：1989-09-04
申请人： KOBE STEEL LTD
发明人： YOSHIGAE TAKEO , SUZUKI TOMIO , KASAI TOSHIO , MATSUDA MASAO , TAKEUCHI TORU
IPC分类号： F23G7/00 , B09B3/00 , F23J1/00
摘要： PURPOSE:To treat ash by melting and solidification without developing a clogging by the slag at the section of throttling of a furnace etc., by specifying the average grain size in a body of powder and granules used for regulating basicity. CONSTITUTION:At the time of treating ash by melting and solidification the average grain size of a body of powder and granules used for regulating basicity is specified as lower than 100mum. With this process the ash to be treated and body of powder and granules used for regulating basicity are mixed uniformly and the basicity is regulated uniformly, and it is possible to supply a body of solid bodies and gaseous bodies which consist of a mixed body the melting point of which is lowered for sure to a specified melting point and primary air to a rotating flow melting furnace 1. With this arrangement there is no clogging at the throttling section 7 of the furnace, etc., and it is possible to treat ash by melting and solidification.

6. 发明专利

JPH0391609A TREATMENT OF ASH BY MELTING AND SOLIDIFICATION 失效
公开(公告)号：JPH0391609A
公开(公告)日：1991-04-17
申请号：JP22887089
申请日：1989-09-04
申请人： KOBE STEEL LTD
发明人： YOSHIGAE TAKEO , SUZUKI TOMIO , KASAI TOSHIO , MATSUDA MASAO , TAKEUCHI TORU
IPC分类号： F23G7/00 , B09B3/00 , F23J1/08
摘要： PURPOSE:To make it difficult for a slag discharging section to be clogged by providing between the melting section and slag discharge section of a melting furnace a funnel section which catches molten slag that is flowing down and pours the caught slag downwards. CONSTITUTION:A funnel section 18 which catches molten slag that is flowing down and pours the caught slag downwards is provided between the melting section 6 and slag discharging section 8 of a rotating flow type melting furnace 1. Since this funnel section 18 has the function to catch downwardly flowing slag, the slag discharging section 8 is not required to have a tilting section as in conventional slag discharging devices and it can be constituted of a vertical section (vertical slag discharging section). When ash is treated by melting and solidifying it in such a device, the molten ash flows down along the funnel wall of the rotating flow type melting furnace 1 and the molten slag that passes a throttling section 7 falls down to a funnel section and is caught there. The caught slag is poured into the vertical slag discharge section from the funnel section 18, flows down to a molten slag transportation means from the slag discharging section 8. The slag is cooled and solidified as it is transported, and it is recovered as solid slag. With this arrangement the flowing slag is difficult to develop clogging in the slag discharging section, and there is, therefore, no trouble of clogging in the slag discharging section and the transporting means of the molten slag causes no trouble in the discharge and recovery of the slag and the treatment of ash by melting and solidification can be carried out.

7. 发明专利

JPS6484014A METHOD FOR MELTING TREATMENT OF INCINERATION ASHES 失效
公开(公告)号：JPS6484014A
公开(公告)日：1989-03-29
申请号：JP24224687
申请日：1987-09-26
申请人： KOBE STEEL LTD
发明人： OKU SHIGERU , KURINISHI YASUO , KASAI TOSHIO , TAKEUCHI TORU , ITO TADASHI
IPC分类号： F23G5/14 , F23G5/00
摘要： PURPOSE:To optimize the efficiency of dewatered sludge treatment by a method wherein dewatered sludge is restrainedly burnt in an incinerator to convert it into exhaust gas and incinerated ashes containing therein unburnt organic substances and then the incineration ashes are melted by heating within a whirling type melting furnace to recover them as slag in a melted state. CONSTITUTION:By carrying out the restrained combustion or the thermal decomposition of dewatered sludge in, for example, a fluidized bed type incinerator 1, the dewatered sludge is converted into exhaust gas G and incineration ashes A containing therein unburnt organic substances. The exhaust gas G and the incineration ashes A are separated, and the incineration ashes A are discharged, together with air for combustion and supplementary fuel, into a current type melting furnace 8 to be burnt and melted by heating, thereby recovering the ashes A as slag in a melted state. That is, the incinerated ashes A containing therein unburnt organic substances, which are discharged together with the exhaust gas G from the incinerator 1 for the dewatered sludge, are arrested and collected to a cyclone 2, and thereafter they are supplied to the melting furnace 8 together with incineration ashes A' which are transferred from a dry type electric dust collector 5. In the melting furnace 8, the incineration ashes A are mixed with air to form a solid and air two-phase flow and are blown into the furnace 8 to be whirled, whereupon they are melted by heating to be turned into slag and recovered.

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