CN209830273U - Vertical rectifying furnace zinc powder production system - Google Patents
Vertical rectifying furnace zinc powder production system Download PDFInfo
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- CN209830273U CN209830273U CN201920493546.3U CN201920493546U CN209830273U CN 209830273 U CN209830273 U CN 209830273U CN 201920493546 U CN201920493546 U CN 201920493546U CN 209830273 U CN209830273 U CN 209830273U
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Abstract
The utility model provides a zinc powder production system of a vertical rectifying furnace, which comprises a melting furnace, a rectifying furnace, a condensing device and the like; the melting furnace comprises a melting tank; the rectifying furnace is of a tower structure consisting of an upper part, a middle part and a lower part, the upper part comprises a heat-insulating shell and a cavity, and a feeding disc and an upper-layer tray group are arranged in the cavity; the middle part comprises a rectifying furnace body and a rectifying furnace combustion chamber, the rectifying furnace combustion chamber is completely isolated from the cavity, and a burner and a lower tray group are arranged in the rectifying furnace combustion chamber; the lower part comprises a base and a No. B zinc pool. The effect is as follows: the rectifying furnace adopts a unique heating mode to melt, heat, evaporate and distill materials, and cools and condenses zinc vapor through a condensing device, so that the obtained zinc powder product has uniform particle size, most of zinc powder has a mesh number of more than 500, the zinc powder yield reaches more than 85%, and the main economic and technical indexes are as follows: the daily output of the furnace is 15-16 tons/day x furnace, the unit consumption of fuel gas is 220-250 cubic meters/ton zinc powder, the capacity of a single furnace base is large, and the practicability is strong.
Description
Technical Field
The utility model relates to the technical field of metal materials, in particular to a vertical retort zinc powder production system.
Background
The powdery metal zinc is dark gray, has good reducibility, antirust and atmospheric corrosion resistant effects, can be used as a pigment, has extremely strong covering power, and is commonly used for manufacturing antirust paint, anticorrosive paint, a strong reducing agent and the like; meanwhile, the metal zinc powder is commonly used as a displacer in metallurgy and chemical engineering due to the relatively negative standard electrode potential, relatively large specific surface area and chemical activity. The conventional production method of the metal zinc powder is a distillation method: the distillation method is that the solid zinc is heated to 1250-1350 ℃ to be changed into zinc vapor, and then the zinc vapor is condensed by a condenser to obtain the zinc powder. Distillation zinc dust is usually produced by two processes, horizontal and vertical. The zinc powder produced by the domestic horizontal furnace production process has the economic and technical indexes that: the daily output of the furnace is 6-7 tons/day x furnace, and the unit consumption of fuel gas is 180-200 cubic meters/ton zinc powder; the zinc powder produced by the vertical furnace production process has the following economic and technical indexes: the daily output of the furnace is 8-10 tons/day per furnace, and the unit consumption of fuel gas is 260-300 cubic meters per ton of zinc powder. Therefore, at the present of high-speed development of economic construction, it is of great significance to design a zinc powder production system with high-efficiency utilization of waste heat, high capacity and low unit consumption of fuel gas.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can make full use of waste heat, the big and lower rectifying furnace zinc powder production system of gas unit consumption of productivity, concrete technical scheme is as follows:
a production system of zinc powder of a rectifying furnace comprises a melting furnace, the rectifying furnace, a gas separation chamber and a condensing device;
the melting furnace comprises a melting furnace body, a melting pool is arranged in the melting furnace body, a melting furnace feed inlet and a zinc liquid outflow port which are communicated with the melting pool are arranged on the side wall of the melting furnace body, and the zinc liquid outflow port is communicated with the zinc sealing groove through a launder;
the rectifying furnace is of a tower structure consisting of an upper part, a middle part and a lower part, the upper part comprises a heat-insulating shell and a cavity arranged in the heat-insulating shell, a feeding disc and an upper-layer tray set are arranged in the cavity, and the feeding disc is communicated with the zinc seal groove through a lower zinc pipe; the middle part comprises a rectifying furnace body and a rectifying furnace combustion chamber arranged in the rectifying furnace body, the rectifying furnace combustion chamber is completely isolated from the cavity, a burner and a lower tower tray group are arranged in the rectifying furnace combustion chamber, and fuel is combusted by the burner to provide heat energy for the whole rectifying furnace; the lower part of the furnace body structure comprises a base, a No. B zinc pool and a discharge opening, the No. B zinc pool is arranged at the lower part of the base and is communicated with the lower part of the furnace body structure, and the discharge opening is communicated with the No. B zinc pool to facilitate the discharge of materials in the No. B zinc pool; the upper tray group, the feeding tray and the lower tray group form a closed furnace body structure, the upper tray group is provided with a gas outlet and is communicated with a gas distribution chamber through a gas guide groove, and the gas distribution chamber is communicated with a condensing device through a gas guide pipe to cool zinc steam so as to produce zinc powder.
Preferably, in the above technical scheme, the heat-insulating shell and the rectifying furnace body are of a closed heat-insulating frame structure consisting of heat-insulating bricks and refractory bricks; the base is formed by supporting brick piers.
Preferably, in the above technical scheme, the bottom and the middle of the combustion chamber of the rectifying furnace are respectively provided with a row of burners, and the two rows of burners are both communicated with a gas supply pipeline through a pipeline; the temperature of the combustion chamber in the furnace body structure is 1250-1350 ℃.
Preferably, the heat exchanger further comprises a heat exchange device, the heat exchange device comprises a heat exchange shell and a heat exchange assembly arranged in the heat exchange shell, the heat exchange shell is provided with an air inlet, a flue gas exhaust port, an air outlet and a flue gas inlet, and the air inlet is communicated with the heat exchange assembly and used for preheating air entering from the outside; the air outlet is communicated with the combustion chamber of the rectifying furnace through a pipeline, so that sufficient oxygen can be provided for a burner to burn fuel, and partial heat can be brought into the rectifying furnace to heat the interior of the rectifying furnace; the hot flue gas discharged after heating the melting furnace is communicated with the heat exchange assembly through the flue gas inlet, preheats the air entering from the outside and is discharged to an underground smoke discharge pipeline through the flue gas outlet.
The preferable among the above technical scheme all is equipped with the valve of control air current size on the pipeline with air inlet, flue gas vent, air outlet and flue gas inlet intercommunication.
Preferably, in the above technical scheme, the heat exchange assembly comprises a heat exchange tube made of high-temperature resistant stainless steel, the temperature of hot tail gas discharged from the melting furnace and entering the heat exchange assembly is 900-1100 ℃, and air entering the heat exchange assembly from the outside can be preheated to 400-600 ℃.
Preferably, the melting furnace further comprises a hearth located above the melting tank, the hearth is a combustion chamber and provides a heat source for melting the zinc ingot for the melting tank, and the hearth is isolated from the melting tank by a flame-isolating arc plate.
Preferably in the above technical scheme, the condensing device comprises at least two groups of condensers connected in parallel, and zinc vapor discharged from the gas guide tube enters the condensers to be condensed to obtain zinc powder of more than 500 meshes.
Use the technical scheme of the utility model, the effect is:
1. the utility model discloses a vertical retort zinc powder production system includes the melting furnace, the rectifying furnace, branch air chamber and condensing equipment, the melting furnace melts the raw materials, the rectifying furnace adopts unique heating methods (by lower supreme heating), the zinc liquid material that comes to the melting furnace evaporates, zinc steam after the evaporation gets into condensing equipment and cools off, it is more than 500 meshes to finally obtain the even and most zinc powder mesh number of zinc powder product particle diameter, zinc powder output rate reaches more than 85%, its economic and technical index is: the daily output of the furnace is 15-16 tons/day, the unit consumption of fuel gas is 220-250 cubic meters/ton of zinc powder, the technical index is in the forefront of the industry, the blank of the prior art is filled, and the practicability is high.
2. The utility model discloses well rectifying furnace adopts the tower structure of compriseing upper portion, middle part and lower part, and tower structure adopts the multilayer nozzle to supply heat, combines upper tray group, charge disc and lower floor's tray group to form inclosed furnace body structure, can realize rapid heating up, and the material is heated evenly in rectifying furnace, can obtain high-quality zinc powder, can improve the productivity again.
3. The utility model discloses well heat transfer device's design can preheat the air that the external world got into, provides sufficient high temperature air for the burning of gas retort combustion chamber fuel, has both improved the combustion efficiency of gas retort, has fully retrieved heat energy again, accords with the energy saving and consumption reduction's that the country advocated purpose. The heat exchange component comprises a stainless steel coil pipe, the heat exchange speed is high, the air entering from the outside can be preheated to 400-600 ℃, the temperature of the rectifying furnace can be rapidly increased, and the capacity is improved.
4. The utility model discloses well melting furnace includes the melting furnace body, and inside melting furnace and the melting tank of being equipped with of melting furnace body, and melting furnace and melting tank pass through the isolation of flame barrier arc, can enough realize that the rapid heating up of melting furnace melts the material completely, can guarantee again that the volatile substance of melting tank zinc does not discharge along with the flue gas, has done the environmental protection production.
5. The utility model discloses well condensing equipment can realize the gradient cooling of material including at least parallelly connected two sets of condensers, the particle diameter of effective control zinc powder, and the practicality is strong.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic structural diagram of a zinc powder production system of a vertical rectifying furnace in an embodiment;
FIG. 2 is a top view of FIG. 1 (heat exchange means not shown);
wherein:
1. the device comprises a melting furnace, 1.1, a melting furnace body, 1.2, a melting tank, 1.3, a melting furnace feed inlet, 1.4, a zinc liquid outflow port, 1.5, a launder, 1.6, a melting furnace hearth, 1.7, a flame-isolating arc plate, 1.8, a feed control valve, 2, a rectifying furnace, 2.1, a heat-insulating shell, 2.2, a cavity, 2.3, an upper tray group, 2.4, a feed tray, 2.5, a rectifying furnace body, 2.6, a rectifying furnace combustion chamber, 2.7, a burner, 2.8, a lower tray group, 2.9, a base, 2.10, a No. B zinc pool, 3, a gas distribution chamber, 4, a condensing device, 4.1, a condenser, 4.2, a cooling water, 4.3, an in-line cooling water pipe, 5, a heat exchange device, 5.1, a heat exchange shell, 5.2, a heat exchange component, 5.3, a flue gas exhaust port, 5.4, an air outlet, 5.5.5.5, a zinc gas seal, a flue gas jacket, a flue gas guide pipe, a zinc guide pipe, a flue gas guide pipe, a flue.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example (b):
a vertical rectifying furnace zinc powder production system comprises a melting furnace 1, a rectifying furnace 2, a gas separation chamber 3, a condensing device 4 and a heat exchange device 5, which are shown in detail in figures 1-2, and specifically comprise:
the melting furnace 1 comprises a melting furnace body 1.1, a melting pool 1.2 and a melting furnace hearth 1.6 are arranged in the melting furnace body 1.1, the melting furnace hearth 1.6 is positioned above the melting pool 1.2, the melting furnace hearth 1.6 is a combustion chamber of the melting furnace 1 and provides a heat source for melting zinc ingots for the melting pool 1.2, and the melting furnace hearth is isolated from the melting pool 1.2 through a flame-isolating arc-shaped plate 1.7; be equipped with on the lateral wall of melting furnace body 1.1 all with the melting furnace charge door 1.3 and the zinc liquid stream export 1.4 of melting tank 1.2 intercommunication, melting furnace charge door 1.3 with melting tank 1.2 intercommunication is used for doing melting tank 1.2 feeds in raw material, zinc liquid stream export 1.4 through the chute 1.5 with 6 intercommunications in zinc sealed groove, be equipped with reinforced control valve 1.8 between zinc liquid stream export 1.4 and the chute 1.5 and be convenient for control the material quantity.
The rectifying furnace 2 is a tower structure consisting of an upper part, a middle part and a lower part, and the details are as follows:
the upper part comprises a heat-insulating shell 2.1 and a cavity 2.2 arranged in the heat-insulating shell 2.1, and the heat-insulating shell 2.1 is a closed heat-insulating frame structure built by light heat-insulating bricks and high-alumina refractory bricks; the inside of cavity 2.2 is equipped with charge tray 2.4 and upper tray group 2.3, charge tray 2.4 through lower zinc pipe 7 with zinc seal groove 6 intercommunication. It is preferable here that the upper tray set 2.3 includes a plurality of trays stacked from top to bottom, through holes for air flow to pass through are provided on each of the plurality of trays, and the through holes on two adjacent trays are staggered.
The middle part comprises a rectifying furnace body 2.5 and a rectifying furnace combustion chamber 2.6 arranged inside the rectifying furnace body 2.5, and the rectifying furnace body 2.5 also adopts a closed heat-preserving frame structure built by light heat-preserving bricks and high-alumina refractory bricks; the rectifying furnace combustion chamber 2.6 is completely separated from the cavity 2.2, a burner 2.7 and a lower tower disc group 2.8 are arranged in the rectifying furnace combustion chamber 2.6, and the burner 2.7 burns fuel to provide heat energy for the whole rectifying furnace 2. Preference is given here to: the lower tray group 2.8 comprises a plurality of trays which are stacked from top to bottom, through holes for passing the melt and zinc steam flow are formed in the trays, and the through holes in the two adjacent trays are arranged in a staggered manner; and the bottom and the middle part of the rectifying furnace combustion chamber 2.6 are respectively provided with a row of burners, and the two rows of burners are communicated with a fuel storage device through pipelines.
The lower part of the device comprises a base 2.9, a No. B zinc pool 2.10 and a discharge opening, wherein the base 2.9 is formed by supporting brick piers; no. B zinc bath 2.10 sets up base 2.9 lower part and with furnace body structure's lower part intercommunication, the discharge opening with No. B zinc bath intercommunication is convenient for unload the material in No. B zinc bath.
In the rectifying furnace 2 of the present embodiment: the upper layer tower tray group 2.3, the feeding tray 2.4 and the lower layer tower tray group 2.8 form a closed furnace body structure; an air outlet at the top of an upper tower disc group of the furnace body structure is communicated with an air distribution chamber 3 through an air guide groove 8, the air distribution chamber 3 is communicated with a condensing device 4 through an air guide pipe 9, and the condensing device 4 condenses zinc steam entering from the air guide pipe 9 to obtain zinc powder; the lower part of the furnace body structure is communicated with a No. B zinc pool 2.10. The internal temperature of the furnace body structure is 1250-1350 ℃.
In the embodiment, the heat exchange device 5 comprises a heat exchange shell 5.1 and a heat exchange assembly 5.2 arranged inside the heat exchange shell 5.1, wherein an air inlet, a flue gas exhaust port 5.3, an air outlet 5.4 and a flue gas inlet 5.5 are arranged on the heat exchange shell 5.1, and the air inlet is communicated with the heat exchange assembly 5.2 and used for preheating air entering from the outside; the air outlet 5.4 is communicated with the combustion chamber 2.6 of the rectifying furnace through a pipeline, so that oxygen can be provided for the combustion fuel of the burner 2.7, and part of heat can be brought in to heat the combustion chamber of the rectifying furnace; the hot gas flow after heating the melting furnace 1 is communicated with the heat exchange component 5.2 through the flue gas inlet 5.5 to preheat the air entering from the outside, and then is exhausted to the underground exhaust pipeline through the flue gas exhaust port 5.3. Preferably: valves for controlling the size of the air flow are arranged on the pipelines communicated with the air inlet, the smoke exhaust port 5.3, the air outlet 5.4 and the smoke inlet 5.5; the heat exchange assembly 5.2 comprises a heat exchange tube made of high-temperature resistant stainless steel. The temperature of hot flue gas discharged from the melting furnace 1 and entering the heat exchange assembly is 900-1100 ℃, and normal temperature air entering the heat exchange assembly from the outside can be preheated to 400-600 ℃.
In this embodiment, the condensing unit 4 includes at least two sets of condensers connected in parallel, the material from the gas guide tube 9 is condensed by the plurality of sets of condensers in sequence to obtain zinc powder of more than 500 meshes, and the condensing unit preferably includes a condenser 4.1, a cooling water jacket 4.2, an in-line cooling water pipe 4.3 and a valve. Other prior art techniques may also be employed.
The technical scheme of the embodiment is specifically as follows:
material path: material → melting furnace charge door 1.3 → melting tank 1.2 → zinc liquid outflow 1.4 → launder 1.5 → zinc seal tank 6 → lower zinc pipe 7 → charge disc 2.4 → zinc liquid flows from top to bottom to fill all the tray groups below the charge disc, zinc vapor from bottom to top tray group 2.3 → air guide tank 8 → air separation chamber 3 → air guide pipe 9 → condensing unit 4 → zinc powder;
↓
the lower tray group 2.8 → No. B zinc pool 2.10 → discharge opening → No. B zinc.
Gas path: outside air → air inlet → heat exchange module 5.2 → air outlet 5.4 → air channel a1 → air channel a2 → retort combustion chamber 2.6 → tail gas channel b1 → tail gas channel b2 → tail gas channel b3 → melting furnace hearth 1.6 → tail gas channel b4 → flue gas inlet 5.5 → heat exchange module 5.2 → flue gas outlet 5.3.
By adopting the technical scheme of the embodiment, the effect is as follows: (1) the zinc powder is prepared by adopting the distillation furnace to carry out distillation, the heating is carried out from bottom to top, the temperature rise is fast, and the productivity can be improved; (2) the heat exchange component in the heat exchange device comprises a stainless steel coil pipe, the heat exchange speed is high, and the air which can enter from the outside can be preheated to 400-600 ℃; (3) the condensing device in the embodiment comprises at least two groups of condensers which are connected in parallel, and zinc powder with the particle size of more than 500 meshes is obtained after zinc vapor materials are condensed by the plurality of groups of condensers in sequence; (4) the combined design of heat exchange device, rectifying furnace and melting furnace is adopted in this embodiment, can realize the high-efficient utilization of waste heat, and its economic technology index is: the daily output of the furnace is 15-16 tons/day, the unit consumption of fuel gas is 220-250 cubic meters/ton zinc powder, and the technical index is in the top of the industry.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a vertical retort zinc powder production system which characterized in that: comprises a melting furnace (1), a rectifying furnace (2), a gas separation chamber (3) and a condensing device (4);
the melting furnace (1) comprises a melting furnace body (1.1), a melting pool (1.2) is arranged in the melting furnace body (1.1), a melting furnace feed inlet (1.3) and a zinc liquid outflow port (1.4) which are communicated with the melting pool (1.2) are arranged on the side wall of the melting furnace body (1.1), and the zinc liquid outflow port (1.4) is communicated with a zinc seal groove (6) through a launder (1.5);
the rectifying furnace (2) is of a tower structure consisting of an upper part, a middle part and a lower part, the upper part comprises a heat-insulating shell (2.1) and a cavity (2.2) arranged in the heat-insulating shell (2.1), a feeding disc (2.4) and an upper-layer tray set (2.3) are arranged in the cavity (2.2), and the feeding disc (2.4) is communicated with the zinc seal tank (6) through a lower zinc pipe (7); the middle part comprises a rectifying furnace body (2.5) and a rectifying furnace combustion chamber (2.6) arranged in the rectifying furnace body (2.5), the rectifying furnace combustion chamber (2.6) is completely isolated from the cavity (2.2), and a burner (2.7) and a lower tray group (2.8) are arranged in the rectifying furnace combustion chamber (2.6); the lower part of the furnace body structure comprises a base (2.9), a No. B zinc pool (2.10) and a discharge opening, wherein the No. B zinc pool (2.10) is arranged at the lower part of the base (2.9) and is communicated with the lower part of the furnace body structure, and the discharge opening is communicated with the No. B zinc pool; the upper tray group (2.3), the feeding tray (2.4) and the lower tray group (2.8) form a closed furnace body structure, the upper tray group (2.3) is provided with an air outlet and is communicated with the gas distribution chamber (3) through an air guide groove (8), and the gas distribution chamber (3) is communicated with the condensing device (4) through an air guide pipe (9).
2. The vertical retort zinc powder production system according to claim 1, characterized in that: the heat-insulating shell (2.1) and the rectifying furnace body (2.5) are of a closed heat-insulating frame structure consisting of heat-insulating bricks and refractory bricks; the base (2.9) is formed by supporting brick piers.
3. The vertical retort zinc powder production system according to claim 1, characterized in that: the bottom and the middle of the rectifying furnace combustion chamber (2.6) are respectively provided with a row of burners, and the two rows of burners are communicated with a gas supply pipeline through pipelines; the temperature of the combustion chamber in the furnace body structure is 1250-1350 ℃.
4. The vertical retort zinc powder production system according to any of claims 1 to 3, characterized in that: the heat exchanger is characterized by further comprising a heat exchange device (5), wherein the heat exchange device (5) comprises a heat exchange shell (5.1) and a heat exchange assembly (5.2) arranged inside the heat exchange shell (5.1), an air inlet, a flue gas exhaust port (5.3), an air outlet (5.4) and a flue gas inlet (5.5) are formed in the heat exchange shell (5.1), and the air inlet is communicated with the heat exchange assembly (5.2); the air outlet (5.4) is communicated with a combustion chamber (2.6) of the rectifying furnace through a pipeline; the hot flue gas discharged after the melting furnace (1) is heated is communicated with the heat exchange component (5.2) through a flue gas inlet (5.5).
5. The vertical retort zinc powder production system according to claim 4, characterized in that: and the pipelines communicated with the air inlet, the smoke exhaust port (5.3), the air outlet (5.4) and the smoke inlet (5.5) are provided with valves for controlling the size of air flow.
6. The vertical retort zinc powder production system according to claim 4, characterized in that: the heat exchange component (5.2) comprises a heat exchange tube made of high-temperature resistant stainless steel, the temperature of hot tail gas which is discharged from the melting furnace (1) and enters the heat exchange component is 900-1100 ℃, and air which enters the heat exchange component from the outside can be preheated to 400-600 ℃.
7. The vertical retort zinc powder production system according to claim 1, characterized in that: the melting furnace (1) further comprises a melting furnace hearth (1.6), the melting furnace hearth (1.6) is located above the melting pool (1.2), the melting furnace hearth (1.6) is a combustion chamber and provides a heat source for melting zinc ingots for the melting pool (1.2), and the melting furnace hearth is isolated from the melting pool (1.2) through a flame isolating arc-shaped plate (1.7).
8. The vertical retort zinc powder production system according to claim 1, characterized in that: the condensing device (4) comprises at least two groups of condensers which are connected in parallel, and zinc vapor discharged from the gas guide pipe (9) enters the condensers to be condensed to obtain zinc powder with the granularity of more than 500 meshes.
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| CN201920493546.3U CN209830273U (en) | 2019-04-12 | 2019-04-12 | Vertical rectifying furnace zinc powder production system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894624A (en) * | 2019-04-12 | 2019-06-18 | 湖南新威凌新材料有限公司 | A kind of vertical rectifying furnace zinc powder production system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894624A (en) * | 2019-04-12 | 2019-06-18 | 湖南新威凌新材料有限公司 | A kind of vertical rectifying furnace zinc powder production system |
| CN109894624B (en) * | 2019-04-12 | 2024-03-22 | 湖南新威凌新材料有限公司 | Zinc powder production system of vertical rectifying furnace |
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