阅读说明：本技术 一种均匀分配粉煤进入熔化吹炼炉烧嘴的输送系统 (Conveying system for uniformly distributing pulverized coal to enter melting converting furnace burner ) 是由 郭祥勇 王彦坤 白家福 于 2020-07-31 设计创作，主要内容包括：一种均匀分配粉煤进入熔化吹炼炉烧嘴的输送系统,包括一个连接粉煤给料管的三通(1)、连接于三通上的两根粉煤送料管(2)、分别连接于粉煤送料管出料口的两端带法兰盘的过渡弯管(3)、与过渡弯管连接的三等分分选器(4)、连接于三等分分选器上的三根曲线型煤粉管(5)、分别连接于每根曲线型煤粉管出口端的四等分分选器(6)、连接于四等分分选器上的四根耐磨夹布胶管(7),夹布胶管的出口端连接于熔化吹炼炉的烧嘴上,12根夹布胶管的出口分别与熔化吹炼炉的12个烧嘴对应连接。本发明可以使入炉烧嘴每处给煤量均匀,确保炉内粉煤燃烧充分,炉内温度升温快,提高炉内物料吹炼有效作业时间。(The utility model provides a conveying system that evenly distributed fine coal got into melting converting furnace nozzle, including a tee bend (1) of connecting the fine coal feed pipe, connect two fine coal feed pipes (2) on the tee bend, connect transition return bend (3) of taking the ring flange in the both ends of fine coal feed pipe discharge gate respectively, trisection sorter (4) of being connected with the transition return bend, three curved type pulverized coal pipe (5) of being connected on trisection sorter, trisection sorter (6) of being connected respectively in every curved type pulverized coal pipe exit end, connect four wear-resisting fabric sandwiched rubber tube (7) on the trisection sorter, the exit end of fabric sandwiched rubber tube is connected on melting converting furnace's nozzle, 12 fabric sandwiched rubber tube's export corresponds with 12 nozzles of melting converting furnace respectively and is connected. The invention can ensure that the coal feeding quantity of each position of the furnace feeding nozzle is uniform, ensure that the pulverized coal in the furnace is fully combusted, quickly raise the temperature in the furnace and improve the effective operation time of material converting in the furnace.)

1. A conveying system for uniformly distributing pulverized coal to enter nozzles of a melting converting furnace is characterized by comprising a tee joint (1) connected with a pulverized coal feeding pipe, two pulverized coal feeding pipes (2) connected to the tee joint, transition bent pipes (3) with flange plates at two ends respectively connected with discharge ports of the pulverized coal feeding pipes, a trisection separator (4) connected with the transition bent pipes, three curved pulverized coal pipes (5) connected with the trisection separator, a quartering separator (6) respectively connected with the outlet end of each curved pulverized coal pipe, and four wear-resistant cloth clamping rubber pipes (7) connected with the quartering separator, wherein the outlet ends of the cloth clamping rubber pipes are connected to the nozzles of the melting converting furnace, and the outlets of 12 cloth clamping rubber pipes are respectively and correspondingly connected with 12 nozzles of the melting converting furnace;

the trisection separator (4) comprises a flared trisection separator pipe body (4a) with flanges at two ends, a trisection separation material body (4b) which is arranged at a flared section in the trisection separator pipe body and has flanges at the end surface, and a trisection separation disc (4c) arranged at the outlet end of the trisection separator pipe body; the flange plates of the trisection material dividing bodies are arranged between the flange plate at the outlet end of the trisection separator pipe body and the trisection material dividing plate and are connected through first connecting bolts (4d), and the trisection separator and the transition bent pipe are in butt joint through the flange plates and are connected through second connecting bolts (4 e); three conical primary distributing channels (4g) are uniformly distributed on the trisection distributing body (4b), three primary distributing holes (4f) are distributed on the trisection distributing disc (4c) at equal angles around the disc center, the three primary distributing holes are respectively butted with the three primary distributing channels (4g) of the trisection distributing body, each primary distributing hole is provided with a primary distributing pipe (4h) extending outwards, and the outer end of each primary distributing pipe is provided with a flange plate;

the quartering classifier (6) comprises an expanding quartering classifier pipe body (6a) with flanges at two ends, an quartering classifying body (6b) which is arranged at an expanding section in the quartering classifier pipe body and has flanges at end faces, and a quartering classifying disc (6c) arranged at the outlet end of the quartering classifier pipe body; the flange plate of the quartering material body is arranged between the flange plate at the outlet end of the quartering separator tube body and the quartering material body and is connected with the quartering material body through a third connecting bolt (6d), and the quartering separator is butted with a primary uniform distribution tube (4h) on the trisection material body through the flange plate and is connected with the primary uniform distribution tube through a fourth connecting bolt (6 e); four conical secondary distributing channels (6g) are uniformly distributed on the quartering distributing body, four secondary distributing holes (6f) are distributed on the quartering distributing disc (6c) at equal angles around the disc center, the four secondary distributing holes are respectively butted with the four secondary distributing channels (6g) of the quartering distributing body (6b), and each secondary distributing hole is provided with a secondary distributing pipe (6h) with an internal threaded hole and extending outwards.

2. The system as claimed in claim 1, wherein the four secondary distribution holes (6f) of the quartering and equally dividing plate (6c) are inclined holes inclined outward from the plate, and the inclined angles of the four secondary distribution holes are the same, so as to form an outward-spreading distribution hole layout.

Technical Field

The invention relates to the technical field of non-ferrous metal smelting, in particular to a pulverized coal conveying system of a tin smelting and melting converting furnace.

Background

A smelting-blowing furnace for smelting tin is mainly used to treat the slag of smelting tin and low-grade tin-contained material to obtain smoke dust containing about 50% of tin and lower the tin content of slag from 3% to below 0.1%, and is a reduction volatilizing process, in which powdered coal is sprayed to provide heat for reaction, air and powdered coal are blown into the molten pool in the furnace through the nozzle of smelting-blowing furnace, and after combustion, the heat is generated, and the high temp. is kept at about 1200 deg.C, so that the molten pool is blown over to volatilize some valuable metals in the molten pool in the form of metal, oxide or sulfide. Too much coal supply can cause waste, insufficient combustion can generate a large amount of toxic and harmful carbon monoxide gas to enter a flue, a boiler and a bag-type dust collector, carbon monoxide and leakage risks are easily generated, the environment is polluted, and toxic and harmful gas injury accidents are caused; the method has the advantages that the coal supply amount is insufficient, the blowing effect of materials in the furnace is poor, the treatment amount of the melting and blowing furnace is insufficient, the capacity of a furnace bed is reduced, particularly in the blowing temperature raising stage, the temperature of the furnace is slowly raised, the working condition requirements cannot be met, the volatilization of tin metal in a molten pool is not ideal, the blowing period is prolonged, more pulverized coal is consumed, and the tin content of slag after blowing is higher. In view of this, it is necessary to optimize the pipeline design before the pulverized coal enters the burners of the furnace body and to add a pulverized coal sorting device that is uniform and stable in coal feeding to ensure that the air-coal ratio of each burner that is sprayed into the furnace body is uniform, the air pressure and the flow velocity are uniform, and the requirement of the combustion atmosphere in the furnace is met.

The existing pulverized coal conveying system is characterized in that a pipeline is distributed around a furnace body, a pulverized coal inlet is designed on the pipeline, branch pipes are distributed above burners of converting furnaces on two sides of the furnace body according to the number of the burners, and the branch pipes are correspondingly connected with the burners through flexible wear-resistant cloth-sandwiched rubber pipes. The disadvantages are that:

a large amount of pulverized coal is left at corner ends of the surrounding pipelines, so that the cleaning is inconvenient, and potential safety hazards exist in the maintenance process;

secondly, the branched pipe can cause unsmooth pulverized coal conveying of a furnace entering burner, cause uneven coal feeding of the converting furnace burner, influence the combustion atmosphere in the furnace, slow temperature rise of the furnace, increase the resistance in the pipe and fail to meet the requirements of working conditions;

and the multi-branch pipe is inconvenient to mount and dismount, and the maintenance workload and difficulty are increased.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a conveying system for uniformly distributing pulverized coal to enter a melting converting furnace nozzle, so that the coal feeding quantity of each position of the furnace nozzle is uniform, the pulverized coal in the furnace is fully combusted, the temperature in the furnace is quickly raised, and the effective operation time of converting materials in the furnace is prolonged.

The technical scheme adopted by the invention is as follows:

a conveying system for uniformly distributing pulverized coal to enter burners of a melting converting furnace comprises a tee joint connected with a pulverized coal feeding pipe, two pulverized coal feeding pipes connected to the tee joint, transition bent pipes with flange plates at two ends respectively connected to discharge ports of the pulverized coal feeding pipes, a trisection separator connected with the transition bent pipes, three curved pulverized coal pipes connected to the trisection separator, a trisection separator connected to the outlet end of each curved pulverized coal pipe, four wear-resistant cloth clamping rubber pipes connected to the trisection separator, wherein the outlet ends of the cloth clamping rubber pipes are connected to the burners of the melting converting furnace, and the outlets of 12 cloth clamping rubber pipes are correspondingly connected with 12 burners of the melting converting furnace respectively;

the trisection separator comprises a flared trisection separator tube body with flanges at two ends, a trisection separation body which is arranged at a flared section in the trisection separator tube body and has flanges at end faces, and a trisection separation disc arranged at the outlet end of the trisection separator tube body; the flange of the trisection material dividing body is arranged between the flange at the outlet end of the trisection separator pipe body and the trisection material dividing plate and is connected through a first connecting bolt, and the trisection separator and the transition bent pipe are butted through the flange and are connected through a second connecting bolt; the trisection material dividing body is uniformly provided with three conical primary material dividing channels, three primary material dividing holes are distributed on the trisection material dividing disc at equal angles around the disc center, the three primary material dividing holes are respectively butted with the three primary material dividing channels of the trisection material dividing body, each primary material dividing hole is provided with a primary material dividing pipe extending outwards, and the outer end of each primary material dividing pipe is provided with a flange plate;

the quartered separator comprises an expanding quartered separator tube body with flanges at two ends, an quartered separating body arranged at an expanding section in the quartered separator tube body and with flanges at end faces, and an quartered separating disc arranged at the outlet end of the quartered separator tube body; the flange plate of the quartered distributing body is arranged between the flange plate at the outlet end of the quartered separator pipe body and the quartered distributing plate and is connected with the quartered distributing plate through a third connecting bolt, and the quartered separator and the primary distributing pipe on the quartered distributing plate are butted through the flange plate and are connected through a fourth connecting bolt; four conical secondary distributing channels are uniformly distributed on the quartering distributing body, four secondary distributing holes are distributed on the quartering distributing disc at equal angles around the disc center, the four secondary distributing holes are respectively butted with the four secondary distributing channels of the quartering distributing body, and each secondary distributing hole is provided with a secondary distributing pipe which extends outwards and is provided with an internal threaded hole.

Furthermore, the four secondary distributing holes on the quartering and uniform distributing disc are inclined holes inclined outwards, and the inclined angles of the four secondary distributing holes are the same, so that an outwards-diffused distributing hole layout is formed.

The invention carries out the optimization design again on the pipeline of the coal feeding system of the melting converting furnace, removes the branch pipe of the pipeline layout, optimizes the pipeline of the pulverized coal entering the furnace and entering the burner, changes the straight pipe and the branched pulverized coal conveying pipeline into the conveying pipeline with smooth curve, and skillfully arranges the trisection separator and the quarteection separator to ensure that the coal feeding quantity at each position of the furnace entering the burner is uniform, ensures the pulverized coal in the furnace to be fully combusted, and the temperature in the furnace is quickly raised, thereby improving the effective operation time of the material converting in the furnace.

Drawings

FIG. 1 is a schematic view of the delivery system of the present invention;

FIG. 2 is a schematic view of the outlet end of the trisection sorter of FIG. 1;

FIG. 3 is a cross-sectional view A-A of the trisection sorter of FIG. 2;

FIG. 4 is a schematic view of the outlet end of the quarter sorter of FIG. 1;

fig. 5 is a sectional view taken along line B-B of fig. 4.

Detailed Description

As shown in figure 1, a conveying system for uniformly distributing pulverized coal to enter a melting converting furnace burner comprises a tee joint 1 connected with a pulverized coal feeding pipe, two pulverized coal feeding pipes 2 connected with the tee joint, a transition bent pipe 3 with flanges at two ends respectively connected with a discharge port of the pulverized coal feeding pipes, a trisection separator 4 connected with the transition bent pipe, three curved pulverized coal pipes 5 connected with the trisection separator, a trisection separator 6 respectively connected with an outlet end of each curved pulverized coal pipe, four wear-resistant cloth-clamping rubber pipes 7 connected with the trisection separator, an outlet end of each cloth-clamping rubber pipe is connected with a burner 8a of the melting converting furnace 8, the melting converting furnace 8 is a device in the prior art, a row of 6 burners 8a are respectively arranged on two opposite surfaces of the furnace body, and the outlets of 12 cloth-sandwiched rubber hoses are respectively and correspondingly connected with 12 burners 8a of the melting converting furnace 8.

As shown in fig. 2 and 3, the trisection separator 4 includes a flared trisection separator tube 4 with flanges at both ends, a trisection separator body 4b provided in a flared section of the trisection separator tube and having flanges at end surfaces, and a trisection dividing plate 4c provided at an outlet end of the trisection separator tube; the flange plate of the trisection material dividing body is arranged between the flange plate at the outlet end of the trisection separator pipe body and the trisection material dividing plate and is connected through a first connecting bolt 4d, and the trisection separator and the transition bent pipe are in butt joint through the flange plate and are connected through a second connecting bolt 4 e; the trisection material dividing body 4b is uniformly provided with three conical primary material dividing channels 4g gradually closing up towards the discharging direction, three primary material dividing holes 4f are arranged on the trisection material dividing disc 4c in an equiangular mode around the disc center, the three primary material dividing holes are respectively butted with the three primary material dividing channels 4g of the trisection material dividing body 4b, each primary material dividing hole is provided with a primary material dividing pipe 4h extending outwards, and the outer end of each primary material dividing pipe is provided with a flange plate.

As shown in fig. 4 and 5, the quartered classifier 6 includes an expanded quartered classifier pipe body 6a having flanges at both ends, an quartered classifying material body 6b provided in an expanded section of the quartered classifier pipe body and having flanges at end surfaces, and an quartered classifying plate 6c provided at an outlet end of the quartered classifier pipe body; the flange plate of the quartered distributing body is arranged between the flange plate at the outlet end of the quartered separator tube body and the quartered distributing plate and is connected through a third connecting bolt 6d, and the quartered separator and the primary distributing tube 4h on the quartered distributing plate are butted through the flange plate and are connected through a fourth connecting bolt 6 e; four conical secondary distributing channels 6g gradually closing up towards the discharging direction are uniformly distributed on the quartered distributing body, four secondary distributing holes 6f are distributed on the quartered distributing disc 6c at equal angles around the disc center, the four secondary distributing holes are respectively butted with the four secondary distributing channels 6g of the quartered distributing body 6b, and each secondary distributing hole is provided with a secondary distributing pipe 6h with an internal threaded hole and extending outwards. The four secondary distributing holes 6f are inclined holes which incline outwards, the inclined angles of the four secondary distributing holes are the same, and the outward-diffused distributing hole layout is formed, so that the wear-resistant cloth-clamping rubber tube 7 can be connected conveniently. The wear-resisting double-layered cloth rubber tube is connected the one end of secondary equipartition pipe and is equipped with the external screw thread coupling, and the external screw thread coupling screw in is intraductal in the secondary equipartition, and the dismouting is convenient.

The system optimizes a coal powder conveying pipeline entering a burner of a melting converting furnace, coal powder from a bin 9 enters a tee joint 1 through a coal feeding system 10, sequentially enters a coal powder feeding pipe 2, a transition bent pipe 3, a trisection separator 4, a curve type coal powder pipe 5, a quartering separator 6 and a wear-resistant cloth clamping rubber pipe 7 along the direction shown by an arrow in the figure 1, and then enters a burner 8a of the melting converting furnace 8, the whole coal powder conveying line has no turning dead angle, the line is smooth, the coal powder is not accumulated and blocked, the uniform coal feeding amount of each part of 12 burners can be ensured, the coal powder in the furnace is fully combusted, the temperature in the furnace is quickly raised, the effective operation time of the material converting in the furnace is prolonged, the requirements of the material converting working condition in the furnace are met, and the energy is saved and the consumption is reduced. The bunker 9 and the coal supply system 10 are prior art devices.

The pulverized coal feeding pipe 2, the transition bent pipe 3, the trisection separator 4, the curve type pulverized coal pipe 5 and the quartering separator 6 are all connected through flanges, and the installation and the disassembly are convenient. The trisection separator pipe body 4a and the quarteration separator pipe body 6a are both arranged into a flaring shape with an outlet larger than an inlet, so that the material distribution body is conveniently arranged and positive pressure is better formed on the pulverized coal conveying line. The air quantity and the air pressure of three primary distributing channels of the trisection separator are balanced and stable, the air quantity and the air pressure of the secondary distributing pipe 6h of each quartering separator are also balanced and stable, the uniform mixing of the air and the coal of the furnace inlet burner is ensured, and the requirement of the combustion atmosphere in the furnace is met. And a wear-resistant cloth-sandwiched rubber hose 7 is connected between the secondary material distribution channel 6g and the burner 8a, so that the proper position can be conveniently adjusted. The whole pulverized coal conveying pipeline is free of branch pipes, reasonable in layout, attractive, practical, good in flowability of pulverized coal in the pipeline, small in conveying resistance and free of residual pulverized coal.

The test proves that the invention has obvious effect and is embodied in the following aspects:

the pipeline layout is reasonable, attractive and practical, the installation and the disassembly are convenient, and the installation and the maintenance difficulty is low;

secondly, the resistance in the tube is reduced, the pulverized coal entering a burner of the melting converting furnace is uniformly distributed, the combustion in the furnace is sufficient, the temperature rise is fast, the coal consumption is reduced, and the energy conservation and the environmental protection are realized;

the trisection separator and the quarteration separator are simple and practical in structure and durable;

and residual coal is not left in the pulverized coal conveying pipeline, pulverized coal explosion cannot occur in the overhauling or welding pipeline, and the safety risk is reduced.

The invention is not only used for the tin smelting and melting converting furnace, but also can be used for the pulverized coal conveying of other smelting furnaces, and the classifiers which are equally divided are arranged according to the actual requirement.