CN111306934A - Stove plate heating external heating type multi-hearth stove - Google Patents

Stove plate heating external heating type multi-hearth stove Download PDF

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Publication number
CN111306934A
CN111306934A CN202010281582.0A CN202010281582A CN111306934A CN 111306934 A CN111306934 A CN 111306934A CN 202010281582 A CN202010281582 A CN 202010281582A CN 111306934 A CN111306934 A CN 111306934A
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CN
China
Prior art keywords
furnace
shaft
plate
stove
central shaft
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Pending
Application number
CN202010281582.0A
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Chinese (zh)
Inventor
薛红兵
闵磊
孙奇
樊时达
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Shaoxing Heyuan Environmental Technology Co ltd
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Shaoxing Heyuan Environmental Technology Co ltd
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Filing date
Publication date
Application filed by Shaoxing Heyuan Environmental Technology Co ltd filed Critical Shaoxing Heyuan Environmental Technology Co ltd
Priority to CN202010281582.0A priority Critical patent/CN111306934A/en
Publication of CN111306934A publication Critical patent/CN111306934A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/062—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated
    • F27B9/063—Resistor heating, e.g. with resistors also emitting IR rays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
    • F27B9/18—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path under the action of scrapers or pushers
    • F27B9/185—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path under the action of scrapers or pushers multiple hearth type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices

Abstract

The invention provides a furnace disc heating external heating type multi-hearth furnace, which comprises a furnace body, a central shaft and a transmission system, wherein the upper end and the lower end of the central shaft penetrate through the furnace body and are arranged in the middle of the furnace body, the transmission system is arranged on one side of the bottom end of the furnace body, the furnace body comprises a furnace bottom, a furnace side, a furnace top, a furnace disc and supporting legs, the furnace body is supported by the supporting legs, the furnace bottom is arranged at the bottom end of the furnace body, the furnace side is arranged on the side surface of the furnace body, the furnace top is arranged at the top end of the furnace body, the furnace discs are uniformly distributed and arranged in the furnace body, the central shaft comprises a lower shaft, an air outlet, a top shaft support, a top shaft, a high shaft, a furnace top sealing device, a central shaft section, a furnace bottom sealing device, an air inlet, a bottom shaft and a bottom shaft support, the furnace plate is made, long service life, and can avoid corrosion of corrosive materials such as materials containing chlorine, sulfur and fluorine.

Description

Stove plate heating external heating type multi-hearth stove
Technical Field
The invention relates to the technical field of regeneration, pyrolysis and calcination, in particular to a furnace disc heating external heating type multi-hearth furnace.
Background
The multi-chamber incinerator with mechanical transmission is an internal heating incinerator, is used for roasting ore in the middle of 19 th century, and is widely used for producing and regenerating granular activated carbon and incinerating sludge nowadays. The method is characterized in that the waste stays in the furnace for a long time, can volatilize more water, is suitable for treating sludge with high water content and low heat value, can use various fuels, has high combustion efficiency, and can utilize any layer of fuel burner to improve the temperature in the furnace. The apparatus is not suitable for roasting and pyrolysis of powdery materials, and for regeneration, such as regeneration of powdered activated carbon.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a stove plate heating external heating type multi-hearth stove to solve the problems in the background technology.
The technical problem solved by the invention is realized by adopting the following technical scheme: a furnace disc heating external heating type multi-hearth furnace comprises a furnace body, a central shaft and a transmission system, wherein the upper end and the lower end of the central shaft penetrate through the furnace body and are arranged in the middle of the furnace body, the transmission system is arranged on one side of the bottom end of the furnace body, the furnace body comprises a furnace bottom, a furnace side, a furnace top, a furnace disc and supporting legs, the furnace body is supported and arranged through the supporting legs, the furnace bottom is arranged at the bottom end of the furnace body, the furnace side is arranged on the side surface of the furnace body, the furnace top is arranged at the top end of the furnace body, the furnace disc is uniformly distributed in the furnace body, the central shaft comprises a lower shaft, an air outlet, a top shaft support, a top shaft, a high shaft, a furnace top sealing device, a central shaft section, a furnace bottom sealing device, an air inlet, a bottom shaft and a bottom shaft support, the central shaft is formed by connecting, the furnace bottom sealing device is characterized in that an air inlet is formed in the other side of the lower end of the central shaft, a top shaft is arranged at the upper end of the central shaft, a top shaft support is arranged above the top shaft, a high shaft is arranged below the top shaft, a furnace top sealing device is arranged below the high shaft, a bottom shaft is arranged at the bottom of the central shaft, a bottom shaft support is arranged below the bottom shaft, a low shaft is arranged above the bottom shaft, a furnace bottom sealing device is arranged at the lower end, close to the furnace bottom, above the low shaft, a transmission system comprises a speed reducer base, a speed reducer and a bevel gear, the speed reducer base is provided with the speed reducer, and the bevel gear is arranged between the central shaft low shaft and the furnace bottom sealing device and.
Further, the furnace top comprises a feed inlet and a smoke outlet, the feed inlet and the smoke outlet are respectively arranged on the left side and the right side of the furnace top, the furnace bottom is provided with a discharge outlet, and the furnace side is provided with a temperature control probe, a steam pipe, a gas nozzle and a plurality of maintenance ports.
Furthermore, a rake arm and rake teeth are arranged on the central shaft section, and the rake teeth are arranged on the rake arm through a trapezoidal groove.
Further, the stove plate include middle unloading stove plate and peripheral unloading stove plate, middle unloading stove plate on be equipped with middle feed opening, peripheral unloading stove plate on be equipped with peripheral feed opening, peripheral unloading stove plate in the middle of be provided with the centre bore, peripheral unloading stove plate on be equipped with the middle part and keep off the ring, the middle part keep off the ring and pass through bolt and center pin section bolted connection.
Furthermore, the furnace side, the refractory material and the second steel ring form a plurality of hearths from top to bottom, and each hearth is provided with a temperature control probe and a heating device.
Further, the furnace plate consists of a silicon carbide furnace plate and a first steel ring on the furnace side, and the silicon carbide furnace plate is provided with a silicon carbide furnace upper plate and a silicon carbide furnace lower plate.
Further, the central shaft section and the rake arm are of a hollow structure.
Further, the furnace bottom sealing device is a filler or a water seal.
Further, the furnace top sealing device is one of water sealing or sand sealing.
Furthermore, the high shaft and the low shaft are provided with elongated holes, and the inner hole of the central shaft is communicated with the air inlet and the air outlet.
Furthermore, the hearth is divided into a first drying section, a second drying section, a first baking section, a second baking section, a first activating section, a second activating section, a third activating section and a cooling section from top to bottom.
Furthermore, the central shaft section is made of chromium-containing heat-resistant cast iron or nodular cast iron through casting.
Furthermore, the rake arms and the rake teeth are cast by high-chromium heat-resistant cast iron or high-temperature alloy.
Furthermore, the central shaft section and the rake arm are insulated by adopting a refractory insulating material.
Compared with the prior art, the invention has the beneficial effects that: the utility model can calcine, activate and regenerate the powdery material, the furnace plate adopts silicon carbide material, which is high temperature resistant, corrosion resistant and long service life, and can avoid the corrosion of corrosive materials such as materials containing chlorine, sulfur and fluorine.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the intermediate blanking furnace tray of the present invention.
Fig. 3 is a schematic structural view of the peripheral blanking furnace tray of the present invention.
Fig. 4 is a schematic view of the hearth structure of the present invention.
In the figure: 1-a reducer base; 2-low axis; 3, a speed reducer; 4-furnace bottom; 5-furnace side; 6-steam pipe; 7-temperature control probe; 8-a gas nozzle; 9-peripheral feed opening; 10-middle feed opening; 11-material moving route; 12-a furnace roof; 13-a feed inlet; 14-air outlet; 15-a top shaft support; 16-a top shaft; 17-high axis; 18 furnace roof sealing means; 19-a smoke outlet; 20-maintenance hole; 21-a central shaft section; 22-a rake arm; 23-electric heating wire; 24-a furnace plate; 25-a middle stop ring; 26-a discharge hole; 27-furnace bottom water sealing; 28-bevel gear; 29-air inlet; 30-bottom axis; 31-bottom shaft support; 32-legs; 33-a first steel ring; 34-a silicon carbide furnace plate; 35-refractory material; 36-a second steel ring; 37-a hearth; 38-rake teeth.
Detailed Description
In the description of the present invention, it should be noted that unless otherwise specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
Example 1
As shown in figure 1, the stove plate heating external heating type multi-hearth stove comprises a stove body, a central shaft and a transmission system, wherein the upper end and the lower end of the central shaft penetrate through the stove body and are arranged in the middle of the stove body, the transmission system is arranged on one side of the bottom end of the stove body, the stove body comprises a stove bottom 4, a stove side 5, a stove top 12, a stove plate 24 and supporting legs 32, the stove body is supported and arranged through the supporting legs 32, the stove bottom 4 is arranged at the bottom end of the stove body, the stove side 5 is arranged on the side surface of the stove body, the stove top 12 is arranged at the top end of the stove body, the stove plate 24 is uniformly distributed and arranged in the stove body, the central shaft comprises a lower shaft 2, an air outlet 14, a top shaft support 15, a top shaft 16, a higher shaft 17, a stove top sealing device 18, a central shaft section 21, a stove bottom sealing device 27, an air inlet 29, a bottom shaft 30 and a bottom shaft, an air outlet 14 is arranged on one side of the upper end of the central shaft, an air inlet 29 is arranged on the other side of the lower end of the central shaft, the upper end of the central shaft is provided with a top shaft 16, a top shaft support 15 is arranged above the top shaft 16, a high shaft 17 is arranged below the top shaft 16, a furnace top sealing device 18 is arranged below the high shaft 17, a bottom shaft 30 is arranged at the bottom of the central shaft, a bottom shaft support 31 is arranged below the bottom shaft 30, used for supporting a central shaft, a lower shaft 2 is arranged above the bottom shaft 30, a furnace bottom sealing device 27 is arranged at the lower end of the upper part of the lower shaft 2 close to the furnace bottom 4, the transmission system comprises a speed reducer base 1, a speed reducer 3 and a bevel gear 28, the speed reducer base 1 is provided with the speed reducer 3, the bevel gear 28 is arranged between the central shaft low shaft 2 and the furnace bottom water sealing device 27 and is rotationally connected with the speed reducer 3.
Further, the furnace top 12 comprises a feeding hole 13 and a smoke exhaust port 19, the feeding hole 13 and the smoke exhaust port 19 are respectively arranged on the left side and the right side of the furnace top 12, the furnace bottom 4 is provided with a discharging hole 26, and the furnace side 5 is provided with a temperature control probe 7, a steam pipe 6 and a plurality of maintenance ports 20.
Further, the central shaft section 21 is provided with a rake arm 22 and rake teeth 38, and the rake teeth 38 are mounted on the rake arm 22 through a trapezoidal groove.
Further, the stove plate 24 include middle unloading stove plate and peripheral unloading stove plate, middle unloading stove plate on be equipped with middle feed opening 10, peripheral unloading stove plate on be equipped with peripheral feed opening 9, peripheral unloading stove plate on be equipped with middle part retaining ring 25, middle part retaining ring 25 pass through bolt and central shaft section 21 bolted connection for block the centre bore of material through peripheral unloading stove plate.
Example 2
As shown in fig. 1-4, a stove plate heating external heating type multi-chamber stove comprises a stove body, a central shaft and a transmission system, wherein the upper end and the lower end of the central shaft penetrate through the stove body and are arranged in the middle of the stove body, the transmission system is arranged on one side of the bottom end of the stove body, the stove body comprises a stove bottom 4, a stove side 5, a stove top 12, a stove plate 24 and supporting legs 32, the stove body is supported by the supporting legs 32, the stove bottom 4 is arranged at the bottom end of the stove body, the stove side 5 is arranged on the side surface of the stove body, the stove top 12 is arranged at the top end of the stove body, the stove plate 24 is uniformly distributed and arranged in the stove body, the central shaft comprises a lower shaft 2, an air outlet 14, a top shaft support 15, a top shaft 16, a higher shaft 17, a stove top sealing device 18, a central shaft section 21, a stove bottom sealing device 27, an air inlet 29, a bottom shaft 30 and a bottom shaft support, an air outlet 14 is arranged on one side of the upper end of the central shaft, an air inlet 29 is arranged on the other side of the lower end of the central shaft, the upper end of the central shaft is provided with a top shaft 16, a top shaft support 15 is arranged above the top shaft 16, a high shaft 17 is arranged below the top shaft 16, a furnace top sealing device 18 is arranged below the high shaft 17, a bottom shaft 30 is arranged at the bottom of the central shaft, a bottom shaft support 31 is arranged below the bottom shaft 30, used for supporting a central shaft, a lower shaft 2 is arranged above the bottom shaft 30, a furnace bottom sealing device 27 is arranged at the lower end of the upper part of the lower shaft 2 close to the furnace bottom 4, the transmission system comprises a speed reducer base 1, a speed reducer 3 and a bevel gear 28, the speed reducer base 1 is provided with the speed reducer 3, the bevel gear 28 is arranged between the central shaft low shaft 2 and the furnace bottom water sealing device 27 and is rotationally connected with the speed reducer 3.
Further, the furnace top 12 comprises a feeding hole 13 and a smoke exhaust port 19, the feeding hole 13 and the smoke exhaust port 19 are respectively arranged on the left side and the right side of the furnace top 12, the furnace bottom 4 is provided with a discharging hole 26, and the furnace side 5 is provided with a temperature control probe 7, a steam pipe 6, a gas nozzle 8 and a plurality of maintenance ports 20.
Further, the central shaft section 21 is provided with a rake arm 22 and rake teeth 38, and the rake teeth 38 are mounted on the rake arm 22 through a trapezoidal groove.
Further, stove dish 24 include middle unloading stove dish and peripheral unloading stove dish, middle unloading stove dish on be equipped with middle feed opening 10, peripheral unloading stove dish on be equipped with peripheral feed opening 9, peripheral unloading stove dish in the middle of be provided with the centre bore, peripheral unloading stove dish on be equipped with middle part fender ring 25, middle part fender ring 25 pass through bolt and 21 bolted connection of central axis section for block the centre bore that the material passes through peripheral unloading stove dish.
Further, the furnace side 5, the refractory material 35 and the second steel ring 36 form a plurality of hearths 37 from top to bottom, each hearth 37 is provided with a temperature control probe 7 and a heating device, and the heating device is one of a gas nozzle 8 or an electric heating wire 23.
Further, the furnace plate 24 is composed of a silicon carbide furnace plate 34, a furnace side 5 and a first steel ring 33, the silicon carbide furnace plate 34 is provided with a silicon carbide furnace upper plate and a silicon carbide furnace lower plate, the furnace plate 24 is formed by sintering or pouring refractory materials and the silicon carbide plate 34 to enclose a heating space, and the heating wire 23 is installed in the middle of the furnace plate 24 and used for heating.
Further, the central shaft section 21 and the rake arm 22 are hollow, and air enters from the air inlet 29, passes through the inner hole of the central shaft section 21 and the inner hole of the rake arm 22, and then is discharged from the air outlet 14, so as to carry heat away, thereby reducing the temperature of the central shaft section 21 and the rake arm 22.
Further, the furnace bottom sealing device 27 is a filler or a water seal.
Further, the roof seal 18 may be water-tight or sand-tight.
Furthermore, the high shaft 17 and the low shaft 2 are provided with elongated holes to communicate the inner hole of the central shaft with the air inlet 13 and the air outlet 29.
Further, the furnace chamber 37 is divided into a first drying section, a second drying section, a first baking section, a second baking section, a first activating section, a second activating section, a third activating section and a cooling section from top to bottom.
Further, the material of the central shaft section 21 is cast by chromium-containing heat-resistant cast iron or nodular cast iron.
Further, the rabble arm 22 and the rabble teeth 38 are cast by high-chromium heat-resistant cast iron or high-temperature alloy.
Further, the central shaft section 21 and the rake arm 22 are insulated by adopting a refractory insulating material.
When the device works, the transmission system speed reducer 3 is started, the central shaft section rotates 21 to drive the rake arms 22 and the rake teeth 38 to rotate on the furnace disc 24, a certain gap is formed between the rake teeth 22 and the furnace disc 24, materials to be calcined or to be activated and regenerated enter from the furnace top feed inlet 13, move towards the center under the pushing of the rake teeth 38, fall onto the next furnace disc 24 through the middle discharge port 10, move towards the periphery of the furnace disc 24 under the pushing of the rake teeth 38, fall onto the next furnace disc 24 through the peripheral discharge ports 9, and repeat the steps, finally, the materials fall onto the furnace bottom 4 and are discharged from the discharge port 26, the materials are discharged from the discharge port 26 from top to bottom according to the material moving route 11, and the smoke generated in the calcining or activating and regenerating process is discharged from the smoke discharge port 19 from bottom to top against the material moving route 11. The material to be activated with steam is passed through steam pipe 6 with activating steam. A plurality of hearth chambers 37 from top to bottom are formed by the fire-resistant heat preservation of the furnace plate 24 and the furnace side 5, each hearth chamber 37 is provided with a temperature control probe 7, a heating device (an electric heating wire 23 or a gas nozzle 8) and a temperature control loop formed by a temperature controller, and the temperature is controlled according to the process requirements. Typically, the temperature of the furnace 37 increases gradually from top to bottom. And a packing sealing and water sealing device 27 is arranged on the furnace bottom low shaft 2 to ensure that materials cannot be leaked. The top shaft 17 of the furnace is provided with a packing sealing and water sealing device 18 to ensure that the materials and the smoke cannot leak, and the water sealing 18 of the furnace top can also adopt a sand sealing scheme. The furnace top high shaft 17 and the furnace bottom low shaft 2 are provided with strip-shaped holes, and the inner hole of the central shaft is communicated with the air inlet and the air outlet.
The specific example is that the powdery saturated activated carbon produced by the reclaimed water treatment process is dehydrated by precipitation and a plate-and-frame filter press, and is packed and transported to an activated carbon regeneration factory by ton bags. The activated carbon contains chloride and sulfide, and generates serious corrosion to the heat-resistant stainless steel (310S) under the condition of high temperature. As shown in figure 1, as a powdered activated carbon regenerating furnace, the multi-hearth furnace 37 of the present invention is divided into a first drying section and a second drying section, and the moisture of the activated carbon is evaporated and dried at 100 to 300 ℃; the first baking section and the second baking section evaporate and carbonize organic substances adsorbed in pores at 400-600 ℃; the first activation section, the second activation section and the third activation section are blown with steam at 800-1000 ℃, organic matters carbonized in the baking section are removed, the activity of the activated carbon is recovered, and the activation reaction C + H is performed2O→CO+H2(ii) a The material activated in the cooling section is primarily cooled in the hearth, and then is discharged from the feed opening 26 for further cooling and packaging. .
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a stove plate heating external heating type many thorax stove, includes furnace body, center pin and transmission system, its characterized in that: the upper end and the lower end of the central shaft penetrate through the furnace body to be arranged in the middle of the furnace body, the transmission system is arranged on one side of the bottom end of the furnace body, the furnace body comprises a furnace bottom, a furnace side, a furnace top, a furnace disc and supporting legs, the furnace body is supported by the supporting legs, the furnace bottom is arranged on the bottom end of the furnace body, the furnace side is arranged on the side surface of the furnace body, the furnace top is arranged at the top end of the furnace body, the furnace disc is uniformly distributed in the furnace body, the central shaft comprises a lower shaft, an air outlet, a top shaft support, a top shaft, a high shaft, a furnace top sealing device, a central shaft section, a furnace bottom sealing device, an air inlet, a bottom shaft and a bottom shaft support, the central shaft is formed by connecting a plurality of central shaft sections through bolts, the air outlet is arranged on one side of the upper end, the furnace bottom sealing device is characterized in that a top shaft support is arranged above the top shaft, a high shaft is arranged below the top shaft, a furnace top sealing device is arranged below the high shaft, a bottom shaft is arranged at the bottom of the central shaft, a bottom shaft support is arranged below the bottom shaft, a low shaft is arranged above the bottom shaft, a furnace bottom sealing device is arranged at the lower end, close to the furnace bottom, of the lower shaft, the transmission system comprises a speed reducer base, a speed reducer and a bevel gear, the speed reducer base is provided with the speed reducer, and the bevel gear is arranged between the center shaft low shaft and the furnace bottom sealing device and is rotatably connected with the speed reducer.
2. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the furnace top on include feed inlet and exhaust port, feed inlet and exhaust port set up the left and right sides at the furnace top respectively, the stove bottom on be provided with the discharge gate, the stove side on install control by temperature change probe, steam pipe and gas nozzle and a plurality of access hole.
3. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the central shaft section is provided with a rake arm and rake teeth, the rake teeth are arranged on the rake arm through a trapezoidal groove, and the rake arm and the rake teeth are cast by high-chromium heat-resistant cast iron or high-temperature alloy.
4. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the stove plate include middle unloading stove plate and peripheral unloading stove plate, middle unloading stove plate on be equipped with middle feed opening, peripheral unloading stove plate on be equipped with peripheral feed opening, peripheral unloading stove plate in the middle of be provided with the centre bore, peripheral unloading stove plate on be equipped with the middle part and keep off the ring, the middle part keep off the ring and pass through bolt and center pin section bolted connection.
5. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the furnace side, the refractory materials and the second steel ring form a plurality of hearths from top to bottom, each hearth is provided with a temperature control probe and a heating device, and each hearth is divided into a first drying section, a second drying section, a first baking section, a second baking section, a first activation section, a second activation section, a third activation section and a cooling section from top to bottom.
6. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the furnace plate consists of a silicon carbide furnace plate and a first steel ring at the furnace side, and the silicon carbide furnace plate is provided with a silicon carbide furnace upper plate and a silicon carbide furnace lower plate.
7. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the central shaft section and the rake arm are of hollow structures.
8. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the furnace bottom sealing device is a filler or a water seal, and the furnace top sealing device is one of a water seal or a sand seal.
9. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the high shaft and the low shaft are provided with elongated holes, and the inner hole of the central shaft is communicated with the air inlet and the air outlet.
10. The plate-heated externally heated multi-hearth furnace according to claim 1, wherein: the central shaft section is made of chromium-containing heat-resistant cast iron or nodular cast iron through casting, and the central shaft section and the rake arm are insulated by adopting a refractory heat-insulating material.
CN202010281582.0A 2020-04-10 2020-04-10 Stove plate heating external heating type multi-hearth stove Pending CN111306934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010281582.0A CN111306934A (en) 2020-04-10 2020-04-10 Stove plate heating external heating type multi-hearth stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010281582.0A CN111306934A (en) 2020-04-10 2020-04-10 Stove plate heating external heating type multi-hearth stove

Publications (1)

Publication Number Publication Date
CN111306934A true CN111306934A (en) 2020-06-19

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Application Number Title Priority Date Filing Date
CN202010281582.0A Pending CN111306934A (en) 2020-04-10 2020-04-10 Stove plate heating external heating type multi-hearth stove

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115448627A (en) * 2022-09-22 2022-12-09 宜昌邦普循环科技有限公司 Method for preparing semi-hydrated gypsum powder by dynamic roasting of purified phosphogypsum

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115448627A (en) * 2022-09-22 2022-12-09 宜昌邦普循环科技有限公司 Method for preparing semi-hydrated gypsum powder by dynamic roasting of purified phosphogypsum
CN115448627B (en) * 2022-09-22 2023-10-20 宜昌邦普循环科技有限公司 Method for preparing semi-hydrated gypsum powder by dynamic roasting of purified phosphogypsum
WO2024060552A1 (en) * 2022-09-22 2024-03-28 宜昌邦普循环科技有限公司 Method for preparing semi-hydrated gypsum powder by dynamically roasting purified ardealite

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