CN109579523B

CN109579523B - Improved natural gas heat accumulating type lead melting furnace

Info

Publication number: CN109579523B
Application number: CN201811439936.9A
Authority: CN
Inventors: 周强
Original assignee: Dayu Mingfa Mining Co ltd
Current assignee: Dayu Mingfa Mining Co ltd
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2020-05-05
Anticipated expiration: 2038-11-29
Also published as: CN109579523A

Abstract

The invention provides an improved natural gas heat accumulating type lead melting furnace, which belongs to the field of metal smelting equipment and comprises a furnace body, a first heat accumulating type burner, a second heat accumulating type burner, a four-way reversing valve, an air blower and an induced draft fan, wherein a heating cavity is arranged at the periphery of the furnace body, and a spiral partition plate is arranged in the heating cavity. The first heat accumulating type combustor and the second heat accumulating type combustor comprise heat accumulating chambers and burners, the heat accumulating chambers are filled with heat accumulators, an electronic igniter is fixed in each burner, and the two heat accumulating chambers, the air blower and the induced draft fan are communicated with the four-way reversing valve. The slag discharge port is connected with the collecting box through the conveying device, a crusher is fixed below the collecting box, a vibrating screen is installed below the crusher, a fine slag box is arranged under the vibrating screen, a coarse slag box is fixed below the lower end of the vibrating screen, and a flotation tank is arranged below the fine slag box. The lead melting furnace can solve the problems of high exhaust gas temperature, non-uniform furnace temperature and low heat efficiency of the current lead melting furnace.

Description

Improved natural gas heat accumulating type lead melting furnace

Technical Field

The invention relates to the field of metal smelting equipment, in particular to an improved natural gas regenerative lead melting furnace.

Background

In the metal smelting process, waste residues containing more metals such as copper, zinc, lead and the like can be generated, and the direct discharge of the waste residues containing heavy metals can not only cause the waste of resources, but also cause great pollution to the environment. According to the regulations of the national environmental protection department, lead slag with lead content lower than 2% can be deeply buried in the ground, so that waste slag generated by smelting needs to be treated to reduce the lead content in the waste slag. When waste residues are treated, a lead melting furnace is used, and the lead melting furnace is mainly used for melting metals with low melting points (less than or equal to 500 ℃) such as lead, zinc, tin and alloys thereof, however, the existing lead melting furnace generally has the problems of high smoke discharge temperature, non-uniform furnace temperature and low heat efficiency in the use process.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an improved natural gas heat accumulating type lead melting furnace to solve the problems of high exhaust gas temperature, non-uniform furnace temperature and low heat efficiency of the conventional lead melting furnace.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides an improved natural gas heat accumulating type lead melting furnace, which comprises a furnace body, a first heat accumulating type burner, a second heat accumulating type burner, a four-way reversing valve, a blower and a draught fan, wherein a heating cavity is arranged at the periphery of the furnace body, the furnace body is accommodated in the heating cavity, the periphery of the heating cavity is hermetically welded with the outer wall of the furnace body, a spiral clapboard is arranged in the heating cavity, the spiral baffle is fixed on the outer wall of the furnace body and the inner wall of the heating cavity along the periphery of the furnace body in a spiral shape, the gradient of the spiral clapboard is 15-20 degrees, the top of the furnace body is fixed with a furnace cover, a feed inlet is arranged on the furnace cover, the bottom of the furnace body is connected with a liquid discharge pipe, the upper part of the side wall is provided with a slag discharge port, an air pressure sensor is fixed in the heating cavity, a temperature sensor is fixed on the side wall of the furnace body, and an exhaust pipe is connected with the side wall of the heating cavity;

the first heat accumulating type burner and the second heat accumulating type burner are respectively fixed on two sides of the furnace body and symmetrically arranged about a central axis of the furnace body, the first heat accumulating type burner and the second heat accumulating type burner are identical in structure and respectively comprise a heat accumulating chamber and a burner, the heat accumulating chamber is filled with a heat accumulator, the burner is fixed on the upper part of the side wall of the heat accumulating chamber, one end of the burner is communicated with the heat accumulating chamber, the other end of the burner is communicated with the heating cavity, and an electronic igniter is fixed in each burner; the bottom parts of the two heat storage chambers are respectively provided with a connector, the connectors of the two heat storage chambers are respectively communicated with a first opening and a second opening of the four-way reversing valve through pipelines, an air outlet of the air blower is communicated with a third opening of the four-way reversing valve through a pipeline, and an air inlet of the induced draft fan is communicated with a fourth opening of the four-way reversing valve through a pipeline; the burner of the first heat accumulating type burner is connected with a first branch pipe, the burner of the second heat accumulating type burner is connected with a second branch pipe, the first branch pipe and the second branch pipe are both communicated with an air inlet pipe, the air inlet pipe is externally connected with a natural gas source, the air inlet pipe is connected with a control valve, and the first branch pipe and the second branch pipe are both connected with a change-over valve;

the slag discharging port is externally connected with a conveying device, one end of the conveying device is communicated with the slag discharging port, the other end of the conveying device is connected with a collecting box, the conveying device comprises a driving motor, a shell, a first rotating shaft and a first spiral conveying blade, the shell is communicated with the interior of the furnace body through the slag discharging port, one end, far away from the furnace body, of the shell is higher than one end, close to the furnace body, of the shell, the first rotating shaft is arranged in the shell along the central axis of the shell and is driven by the driving motor, the first spiral conveying blade is fixed on the outer wall of the first rotating shaft along the axial direction of the first rotating shaft, the shell is communicated with the interior of the furnace body, the first rotating shaft penetrates through the slag discharging port and extends into the interior of the furnace body, a plurality of second spiral conveying blades are arranged on one section of the first rotating shaft in the furnace body, and the end part of the first rotating, the second spiral conveying blades are fixed on the outer wall of the first rotating shaft along the axial direction of the first rotating shaft, one side, far away from the first rotating shaft, of each second spiral conveying blade extends outwards to form a baffle, the baffle is perpendicular to the surface of each second spiral conveying blade, a through hole is formed in each baffle, a second bevel gear is arranged in the furnace body and is installed on the furnace cover through a second rotating shaft, the second rotating shaft is rotatably connected with the furnace cover, the second bevel gear is installed at the bottom of the second rotating shaft and is fixedly connected with the second rotating shaft, the second bevel gear is meshed with the first bevel gear, a scraper is fixed on the second rotating shaft and extends outwards along the radial direction of the second rotating shaft, the scraper is obliquely arranged and is positioned on one side, far away from the second rotating shaft, of the scraper is higher than one end, positioned on the second rotating shaft, an infrared distance measuring sensor is arranged on the bottom wall of the furnace cover, and a probe of the infrared distance measuring sensor faces downwards;

the collecting box bottom opening, be fixed with the rubbing crusher under the opening, the discharge port below installation shale shaker of rubbing crusher, the shale shaker includes vibrator and sieve, the sieve slope sets up, the vibrator is fixed the sieve bottom, be equipped with the thin sediment case under the sieve, be fixed with thick sediment case under the lower end of sieve, it has the bin outlet to open at thin sediment bottom of the case portion, be equipped with the flotation cell under the bin outlet.

In a preferred technical solution of the present invention, a distance between two adjacent second spiral conveying blades on the first rotating shaft increases from one end close to the second rotating shaft to one end far from the second rotating shaft, and a spiral radius of the second spiral conveying blades increases from one end close to the second rotating shaft to one end far from the second rotating shaft.

In a preferred technical scheme of the invention, a storage box is fixed on the furnace cover, and an opening is formed in the bottom of the storage box.

In a preferred technical scheme of the invention, a spiral stirrer is arranged below the storage box, the spiral stirrer is fixed on the furnace cover, the spiral stirrer is positioned right below an opening at the bottom of the storage box, and an outlet of the spiral stirrer is communicated with the feeding hole.

In a preferred technical scheme of the invention, the automatic feeding device is further included, a discharge port of the automatic feeding device is positioned above the material storage box, and the automatic feeding device is a spiral conveyor or a conveying belt.

In a preferred technical scheme of the invention, one end of the exhaust pipe is connected with a heat exchanger, and the heat exchanger is a plate heat exchanger or a tube-fin heat exchanger.

In a preferred technical scheme of the invention, the heat accumulator is honeycomb-shaped alumina.

In a preferred technical scheme of the invention, the blower and the induced draft fan are fixed on the ground through bolts.

In a preferred technical scheme of the invention, an ultraviolet flame detector and a flame relay are fixed in each burner.

In a preferred technical scheme of the present invention, a heat insulation layer is disposed at the periphery of the heating cavity.

The invention has the beneficial effects that:

according to the improved natural gas heat accumulating type lead melting furnace provided by the invention, metal impurities in the metal melting process can be quickly and effectively removed through the scraper and the conveying device in the furnace, so that the impurity content of molten metal is reduced; the heating cavity is arranged outside the furnace body, the spiral partition board is fixed in the heating cavity, the first heat accumulating type burner and the second heat accumulating type burner are arranged outside the furnace body, the two heat accumulating type burners can suck out high-temperature waste gas after the combustion of the furnace body and heat natural gas in the heat accumulating chamber, the energy utilization is reduced, the heat efficiency is improved, meanwhile, the temperature of the high-temperature waste gas is reduced after the heat exchange with the natural gas, and the environment cannot be damaged after the heat exchange is carried out; the gas is combusted at the burner, the high-temperature flue gas after combustion enters the heating cavity to heat the furnace body, the spiral partition plate can prolong the retention time of the high-temperature flue gas in the heating cavity, and the high-temperature flame does not exist in the furnace body, so that the local high temperature of the furnace body can be avoided, and the furnace temperature is more uniform.

Drawings

Fig. 1 is a schematic structural diagram of an improved natural gas regenerative lead smelting furnace according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion a-a of FIG. 1;

fig. 3 is a schematic structural view of a second spiral conveying blade and a baffle provided in the embodiment.

In the figure:

1. a furnace body; 2. a first regenerative burner; 3. a second regenerative burner; 4. an induced draft fan; 5. a blower; 6. a heat exchanger; 7. a collection box; 8. a pulverizer; 9. vibrating screen; 10. a fine slag box; 11. a coarse slag box; 12. a flotation tank; 13. a screw mixer; 14. a material storage box; 15. a furnace cover; 16. a thermal insulation layer; 17. a heating cavity; 18. an automatic feeding device; 19. a four-way reversing valve; 20. a conveying device; 21. a regenerator; 22. burning a nozzle; 23. a first bevel gear; 24. a second rotating shaft; 25. a second bevel gear; 26. a squeegee; 91. a vibrator; 92. a sieve plate; 111. a temperature sensor; 112. a liquid discharge pipe; 113. an air inlet pipe; 114. a second branch pipe; 115. a first branch pipe; 116. a changeover valve; 117. a control valve; 118. an infrared ranging sensor; 151. lifting lugs; 171. a spiral partition plate; 172. an air pressure sensor; 173. an exhaust pipe; 201. a drive motor; 202. a first rotating shaft; 203. a housing; 204. a first spiral conveying leaf; 205. a second spiral conveying leaf; 206. a baffle plate; 211. a heat accumulator; 221. an ultraviolet flame detector; 222. a flame relay; 223. an electronic igniter; 2061. and a through hole.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 to 3, the invention discloses an improved natural gas heat accumulating type lead melting furnace, which comprises a furnace body 1, a first heat accumulating type burner 2, a second heat accumulating type burner 3, a four-way reversing valve 19, an air blower 5 and an induced draft fan 4, wherein a heating cavity 17 is arranged on the periphery of the furnace body 1, the furnace body 1 is accommodated in the heating cavity 17, the periphery of the heating cavity 17 is hermetically welded with the outer wall of the furnace body 1, a spiral partition plate 171 is arranged in the heating cavity 17, the spiral partition plate 171 is spirally fixed on the outer wall of the furnace body 1 and the inner wall of the heating cavity 17 along the periphery of the furnace body 1, the gradient of the spiral partition plate 171 is 15 degrees to 20 degrees, and the spiral partition plate 171 is arranged on one; the furnace comprises a furnace body 1, a furnace cover 15, a liquid discharge pipe 112, a slag discharge port, a heating cavity 17, an air pressure sensor 172, a temperature sensor 111, an exhaust pipe 173 and a temperature sensor pt100, wherein the furnace cover 15 is fixed at the top of the furnace body 1, preferably, the furnace cover 15 is fixed with the furnace body 1 by a buckle, the furnace cover 15 is provided with a feed port, the bottom of the furnace body 1 is connected with the liquid discharge pipe 112, the upper part of the side wall is provided with the slag discharge port, the heating cavity 17 is internally fixed with the air pressure sensor 172, the;

the first heat accumulating type burner 2 and the second heat accumulating type burner 3 are respectively fixed on two sides of the furnace body 1 and symmetrically arranged about a central axis of the furnace body 1, the first heat accumulating type burner 2 and the second heat accumulating type burner 3 are identical in structure and respectively comprise a heat accumulating chamber 21 and a burner 22, the heat accumulating chamber 21 is filled with a heat accumulator 211, the burner 22 is fixed on the upper part of the side wall of the heat accumulating chamber 21, one end of the burner 22 is communicated with the heat accumulating chamber 21, the other end of the burner 22 is communicated with the heating cavity 17, an electronic igniter 223 is fixed in each burner 22, and the electronic igniter 223 adopts a high-voltage pulse electronic high-energy igniter and is of a middle-day GDZ-VI model; the bottom parts of the two heat storage chambers 21 are respectively provided with a connector, the connectors of the two heat storage chambers 21 are respectively communicated with a first opening and a second opening of the four-way reversing valve 19 through pipelines, an air outlet of the air blower 5 is communicated with a third opening of the four-way reversing valve 19 through a pipeline, and an air inlet of the induced draft fan 4 is communicated with a fourth opening of the four-way reversing valve 19 through a pipeline; the burner 22 of the first regenerative burner 2 is connected with a first branch pipe 115, the burner 22 of the second regenerative burner 3 is connected with a second branch pipe 114, the first branch pipe 115 and the second branch pipe 114 are both communicated with an air inlet pipe 113, the air inlet pipe 113 is externally connected with a natural gas source, the air inlet pipe 113 is connected with a control valve 117, the first branch pipe 115 and the second branch pipe 114 are both connected with a change-over valve 116, the change-over valve 116 adopts an inlet single-drive pneumatic actuator, and a driving medium is compressed air;

the external conveyor 20 of row's cinder notch, conveyor 20 one end with row's cinder notch intercommunication, the other end even has collecting box 7, conveyor includes driving motor 201, casing 203, first pivot 202 and first spiral conveying leaf 204, casing 203 pass through row's cinder notch with the inside intercommunication of furnace body 1, just casing 203 keeps away from the height that furnace body 1 one end is higher than being close to furnace body 1 one end, first pivot 202 along the axis of casing 203 sets up in the casing 203, and by driving motor 201 drives, first spiral conveying leaf 204 is fixed on first pivot 202 outer wall along the axis direction of first pivot 202, casing 203 with the inside intercommunication of furnace body 1, first pivot 202 runs through row's cinder notch extends into inside furnace body 1, is located one section in furnace body 1 be equipped with a plurality of second spiral conveying leaves 205 on first pivot 202, the end portion of the first bevel gear 23 is fixedly connected with the first bevel gear 23, the plurality of second spiral conveying blades 205 are all fixed on the outer wall of the first rotating shaft 202 along the axial direction of the first rotating shaft 202, further, the distance between two adjacent second spiral conveying blades 205 on the first rotating shaft 202 increases gradually from the end close to the second rotating shaft 24 to the end far away from the second rotating shaft 24, and the spiral radius of the second spiral conveying blades 205 increases gradually from the end close to the second rotating shaft 24 to the end far away from the second rotating shaft 24. A baffle 206 extends outwards from one side of the second spiral conveying blade 205 far away from the first rotating shaft 202, the baffle 206 is perpendicular to the surface of the second spiral conveying blade 205, a through hole 2061 is formed in the baffle 206, a second bevel gear 25 is arranged in the furnace body 1, the second bevel gear 25 is installed on the furnace cover through a second rotating shaft 24, the second rotating shaft 24 is rotatably connected with the furnace cover, the second bevel gear 25 is installed at the bottom of the second rotating shaft 24 and fixedly connected with the second rotating shaft 24, the second bevel gear 25 is meshed with the first bevel gear 23, a scraper 26 is fixed on the second rotating shaft 24, the scraper 26 extends outwards along the radial direction of the second rotating shaft 24, the scraper 26 is obliquely arranged and is positioned at one side below the second bevel gear 25, and the height of one end of the scraper 26 far away from the second rotating shaft 24 is higher than the height of one end of the second rotating shaft 24, an infrared distance measuring sensor 118 is arranged on the bottom wall of the furnace cover 1, and a probe of the infrared distance measuring sensor 118 faces downward; conveyor 20 will the discharged waste residue of row's cinder notch is carried in the collecting box 7 driving motor 201 drive during first pivot 202, first pivot 202 is through two intermeshing first bevel gear 23 with second bevel gear 24 drives second pivot 24 is rotatory, second pivot 24 drives scraper blade 26 is rotatory, scraper blade 26 gathers together the dross of liquid level the inside center department of furnace body 1, then the dross quilt second spiral delivery leaf 205 sends into in the casing 203, send into at last in the collecting box 7, and infrared distance measuring sensor 118 is used for controlling the height of liquid level in the furnace body 1 makes the liquid level keep first bevel gear 23 with the handing-over department of second bevel gear 25 to the dross is discharged. The collecting box 7 bottom opening, be fixed with rubbing crusher 8 under the opening, preferably, rubbing crusher 8 is double helix rubbing crusher 8, rubbing crusher 8's discharge port below installation shale shaker 9, shale shaker 9 includes vibrator 91 and sieve 92, sieve 92 slope sets up, vibrator 91 is fixed in sieve 92 bottom, vibrator 91 makes sieve 92 vibrations, has strengthened the screening effect of sieve 92, be equipped with thin sediment case 10 under sieve 92, thin sediment case 10 is used for accepting the tiny particle waste residue that falls down from sieve 92 mesh, be fixed with coarse sediment case 11 under the sieve 92 lower extreme, coarse sediment case 11 is used for accepting the large granule waste residue that falls down from the sieve 92 lower extreme, it has the bin outlet to open at thin sediment case 10 bottom, be equipped with flotation cell 12 under the bin outlet, flotation cell 12 can make the waste residue that the plumbous volume is little float on the liquid surface, and the waste slag with more than 2 percent of lead content is deposited at the bottom.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

According to the improved natural gas heat accumulating type lead melting furnace, the heating cavity 17 is arranged on the outer side of the furnace body 1 of the lead melting furnace, the spiral partition plate 171 is fixed in the heating cavity 17, the first heat accumulating type burner 2 and the second heat accumulating type burner 3 are arranged outside the furnace body 1, the two heat accumulating type burners can suck out high-temperature waste gas generated after the combustion of the furnace body 1 and heat natural gas in the heat accumulating chamber 21, the energy utilization is reduced, the heat efficiency is improved, meanwhile, the temperature is reduced after the heat exchange between the high-temperature waste gas and the natural gas, and the environment cannot be damaged after the discharge; the gas is in the nozzle 22 burns, and the high temperature flue gas after the burning reentrants in heating chamber 17 right furnace body 1 heats, spiral baffle 171 can prolong the high temperature flue gas and be in the dwell time in heating chamber 17, because there is not high temperature flame in the furnace body 1, can avoid furnace body 1 local high temperature, makes the furnace temperature more even.

More specifically, the waste slag generated by the smeltery contains metals such as lead, copper, zinc and the like, and because the melting points of the three are different, wherein the melting point of lead is 328 ℃, the melting point of copper is 1085 ℃ and the melting point of zinc is 419.5 ℃, in the process of treating the waste slag by using a lead melting furnace, the temperature of the lead melting furnace is controlled within 400 ℃, the metal lead is in a molten state in the smelting process, and other metal impurities float on the surface of the molten liquid and are discharged from the slag discharge port. In the heating process, the natural gas is followed intake pipe 113 warp first branch 115 gets into first heat accumulating type combustor 2 in the nozzle 22, at this moment air-blower 5 with the outside cold air drum advance first heat accumulating type combustor 2 in the nozzle 22, with the air mixing quilt electronic igniter 223 ignites and burns, the high temperature flue gas after the burning gets into heating chamber 17 bottom, right furnace body 1 heats, spiral baffle 171 in the heating chamber 17 will heating chamber 17 separates into a plurality of spaces, high temperature flue gas can stay for a long time in heating chamber 17, in order to right furnace body 1 carries out fully heating. Then the four-way reversing valve 19 switches the direction to communicate the induced draft fan 4 with the second heat accumulating type burner 3, the induced draft fan 4 causes the high temperature in the heating cavity 17 to be sucked into the second heat accumulating type burner 3, and the heat of the high-temperature flue gas is stored in the heat accumulating chamber 21 when the high-temperature flue gas passes through the heat accumulating chamber 21. Then the natural gas in the gas inlet pipe 113 enters the second heat accumulating type burner 3, the natural gas obtains heat in the heat accumulating chamber 21 of the second heat accumulating type burner 3, the temperature rise can reach 800-1000 ℃, at this time, the four-way reversing valve 19 reads and switches the direction, the air blower 5 blows the outside air into the second heat accumulating type burner 3 to be mixed with the natural gas for combustion, the high-temperature flue gas after combustion enters the bottom of the heating cavity 17, and the furnace body 1 is heated. The first heat accumulating type combustor 2 and the second heat accumulating type combustor 3 continuously heat and combust natural gas and air, energy consumption can be effectively reduced, heat efficiency is improved, high-temperature flue gas exchanges heat with the natural gas and the outside air in the heat accumulating chamber 21, temperature is reduced, and pollution to the air can not be caused after emission. The four-way reversing valve 19 can resist the temperature of 300 ℃ and the switching time interval is 1-2min once.

Further, a storage box 14 is fixed on the furnace cover 15, and an opening is formed at the bottom of the storage box 14; the storage box 14 is used for storing metal waste residues, and the waste residues are added into the furnace body 1 through the opening, so that the working efficiency is improved.

Further, a spiral stirrer 13 is arranged below the material storage box 14, the spiral stirrer 13 is fixed on the furnace cover 15, the bolt stirrer is positioned right below an opening at the bottom of the material storage box 14, and an outlet of the spiral stirrer 13 is communicated with the feeding hole; the spiral stirrer 13 stirs the metal waste slag, and the waste slag is crushed, so that the smelting effect of the furnace body 1 is better.

Further, the automatic feeding device 18 is further included, a discharge port of the automatic feeding device 18 is positioned above the storage box 14, and the automatic feeding device 18 is a screw conveyor or a conveying belt; the automatic feeding device 18 can feed the metal slag into the storage box 14, so that the working efficiency is improved.

Further, one end of the exhaust pipe 173 is connected with a heat exchanger 6, and the heat exchanger 6 is a plate heat exchanger 6 or a tube-fin heat exchanger 6; when atmospheric pressure in the heating chamber 17 was too high, blast pipe 173 will high temperature waste gas in the heating chamber 17 directly discharges, in order to guarantee the security in heating chamber 17, heat exchanger 6 adopts aqueous vapor heat transfer, and the cold water heating is provided to exhaust high temperature flue gas, provides production, domestic water, improves energy utilization.

Further, the heat storage body 211 is honeycomb alumina. Adopt honeycomb alumina heat accumulator 211 to replace traditional heat accumulation ball to be the heat transfer medium, increased heat transfer specific surface area, reduce regenerator 21 volume on the one hand, on the other hand can make heat accumulator 211 basis unanimous with furnace body 1, and simultaneously, air, flue gas pass through honeycomb heat accumulator 211's resistance and reduce than heat accumulation ball resistance, and air-blower 5 and 4 wind pressures of draught fan do corresponding reduction.

Further, the air blower 5 and the induced draft fan 4 are fixed on the ground through bolts; and the air blower 5 and the induced draft fan 4 are fixed on the ground to ensure safe operation.

Further, an ultraviolet flame detector 221 and a flame relay 222 are fixed in each burner 22; the ultraviolet flame detector 221 and the flame relay 222 are used for monitoring the flame, and when the ignition failure or the fault flameout occurs, a control instruction is sent out to cut off the supply of the gas.

Further, a heat insulation layer 16 is arranged on the periphery of the heating cavity 17; the heat insulation layer 16 isolates the heating cavity 17 from the outside, and plays roles in heat insulation and worker safety guarantee.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. The utility model provides an improved generation natural gas heat accumulation formula lead melting furnace which characterized in that:

including furnace body (1), first heat accumulation formula combustor (2), second heat accumulation formula combustor (3), cross switching-over valve (19), air-blower (5) and draught fan (4), furnace body (1) periphery is equipped with heating chamber (17), furnace body (1) accept in heating chamber (17), just heating chamber (17) periphery with furnace body (1) outer wall seal welding, be equipped with spiral baffle (171) in heating chamber (17), spiral baffle (171) are followed furnace body (1) periphery is the heliciform and fixes furnace body (1) outer wall with on heating chamber (17) inner wall, the slope of spiral baffle (171) is 15-20, furnace body (1) top is fixed with bell (15), be equipped with the feed inlet on bell (15), furnace body (1) bottom even has fluid-discharge tube (112), the upper part of the side wall is provided with a slag discharge port, an air pressure sensor (172) is fixed in the heating cavity (17), a temperature sensor (111) is fixed on the side wall of the furnace body (1), and the side wall of the heating cavity (17) is connected with an exhaust pipe (173);

the first heat accumulating type burner (2) and the second heat accumulating type burner (3) are respectively fixed on two sides of the furnace body (1) and symmetrically arranged about a central axis of the furnace body (1), the first heat accumulating type burner (2) and the second heat accumulating type burner (3) are identical in structure and respectively comprise a heat accumulating chamber (21) and a burner (22), the heat accumulating chamber (21) is filled with a heat accumulator (211), the burner (22) is fixed on the upper portion of the side wall of the heat accumulating chamber (21), one end of the burner (22) is communicated with the heat accumulating chamber (21), the other end of the burner is communicated with the heating cavity (17), and an electronic igniter (223) is fixed in each burner (22); the bottom parts of the two heat storage chambers (21) are respectively provided with a connector, the connectors of the two heat storage chambers (21) are respectively communicated with a first opening and a second opening of the four-way reversing valve (19) through pipelines, an air outlet of the air blower (5) is communicated with a third opening of the four-way reversing valve (19) through a pipeline, and an air inlet of the induced draft fan (4) is communicated with a fourth opening of the four-way reversing valve (19) through a pipeline; the burner (22) of the first heat accumulating type burner (2) is connected with a first branch pipe (115), the burner (22) of the second heat accumulating type burner (3) is connected with a second branch pipe (114), the first branch pipe (115) and the second branch pipe (114) are both communicated with an air inlet pipe (113), the air inlet pipe (113) is externally connected with a natural gas source, the air inlet pipe (113) is connected with a control valve (117), and the first branch pipe (115) and the second branch pipe (114) are both connected with a change-over valve (116);

the external conveying device (20) of row's cinder notch, conveyor (20) one end with arrange the cinder notch intercommunication, the other end even has collecting box (7), conveyor includes driving motor (201), casing (203), first pivot (202) and first spiral conveying leaf (204), casing (203) pass through arrange the cinder notch with the inside intercommunication of furnace body (1), just casing (203) are kept away from the height that highly is higher than be close to furnace body (1) one end of furnace body (1), first pivot (202) are followed the axis setting of casing (203) is in casing (203), and by driving motor (201) drive, first spiral conveying leaf (204) are followed the axis direction of first pivot (202) is fixed on first pivot (202) outer wall, casing (203) with the inside intercommunication of furnace body (1), the first rotating shaft (202) penetrates through the slag discharge port and extends into the furnace body (1), a plurality of second spiral conveying blades (205) are arranged on one section of the first rotating shaft (202) in the furnace body (1), a first bevel gear (23) is fixedly connected to the end part of the first rotating shaft, the second spiral conveying blades (205) are fixed on the outer wall of the first rotating shaft (202) along the axis direction of the first rotating shaft (202), a baffle (206) extends outwards from one side, away from the first rotating shaft (202), of each second spiral conveying blade (205), the baffle (206) is perpendicular to the surface of each second spiral conveying blade (205), a through hole (2061) is formed in the baffle (206), a second bevel gear (25) is arranged in the furnace body (1), the second bevel gear (25) is installed on the furnace cover through the second rotating shaft (24), and the second rotating shaft (24) is rotatably connected with the furnace cover, the second bevel gear (25) is mounted at the bottom of the second rotating shaft (24) and fixedly connected with the second rotating shaft (24), the second bevel gear (25) is meshed with the first bevel gear (23), a scraper (26) is fixed on the second rotating shaft (24), the scraper (26) extends outwards along the radial direction of the second rotating shaft (24), the scraper (26) is obliquely arranged and is positioned on one side below the second bevel gear (25), the height of one end, far away from the second rotating shaft (24), of the scraper (26) is higher than that of one end, far away from the second rotating shaft (24), of the scraper (26), an infrared distance measuring sensor (118) is mounted on the bottom wall of the furnace cover (1), and a probe of the infrared distance measuring sensor (118) faces the whole lower position;

collecting box (7) bottom opening, be fixed with rubbing crusher (8) under the opening, discharge port below installation shale shaker (9) of rubbing crusher (8), shale shaker (9) include vibrator (91) and sieve (92), sieve (92) slope sets up, vibrator (91) are fixed sieve (92) bottom, be equipped with fine slag case (10) under sieve (92), be fixed with coarse slag case (11) under sieve (92) lower end, open fine slag case (10) bottom has the bin outlet, be equipped with flotation cell (12) under the bin outlet.

2. An improved natural gas regenerative lead melting furnace as claimed in claim 1, wherein:

the distance between two adjacent second spiral conveying blades (205) on the first rotating shaft (202) is gradually increased from one end close to the second rotating shaft (24) to one end far away from the second rotating shaft (24), and the spiral radius of the second spiral conveying blades (205) is gradually increased from one end close to the second rotating shaft (24) to one end far away from the second rotating shaft (24).

3. An improved natural gas regenerative lead melting furnace as claimed in claim 1, wherein:

a storage box (14) is fixed on the furnace cover (15), and an opening is formed in the bottom of the storage box (14).

4. An improved natural gas regenerative lead melting furnace as claimed in claim 3, wherein:

spiral stirrer (13) is arranged below the storage box (14), the spiral stirrer (13) is fixed on the furnace cover (15), the spiral stirrer (13) is positioned under the bottom opening of the storage box (14), and the outlet of the spiral stirrer (13) is communicated with the feed inlet.

5. An improved natural gas regenerative lead melting furnace as claimed in claim 3, wherein:

the automatic feeding device (18) is further included, a discharge hole of the automatic feeding device (18) is located above the storage box (14), and the automatic feeding device (18) is a spiral conveyor or a conveying belt.

6. An improved natural gas regenerative lead melting furnace as claimed in claim 1, wherein:

one end of the exhaust pipe (173) is connected with a heat exchanger (6), and the heat exchanger (6) is a plate heat exchanger (6) or a tube-fin heat exchanger (6).

7. An improved natural gas regenerative lead melting furnace as claimed in claim 1, wherein:

the heat accumulator (211) is honeycomb-shaped alumina.

8. An improved natural gas regenerative lead melting furnace as claimed in claim 1, wherein:

the air blower (5) and the induced draft fan (4) are fixed on the ground through bolts.

9. An improved natural gas regenerative lead melting furnace as claimed in claim 1, wherein:

an ultraviolet flame detector (221) and a flame relay (222) are fixed in each burner (22).

10. An improved natural gas regenerative lead melting furnace as claimed in claim 1, wherein:

and a heat insulation layer (16) is arranged on the periphery of the heating cavity (17).