CN202881301U - Pulverized coal injection system of blast furnace - Google Patents
Pulverized coal injection system of blast furnace Download PDFInfo
- Publication number
- CN202881301U CN202881301U CN 201220415654 CN201220415654U CN202881301U CN 202881301 U CN202881301 U CN 202881301U CN 201220415654 CN201220415654 CN 201220415654 CN 201220415654 U CN201220415654 U CN 201220415654U CN 202881301 U CN202881301 U CN 202881301U
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- winding
- injection
- pulverized coal
- pipeline
- tank
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Abstract
The utility model provides a pulverized coal injection system of a blast furnace. The pulverized coal injection system comprises multiple injection tanks, fluidization tanks, injection branch pipes, coal power injection valves, an injection header pipe, pressurizing pipelines, pressuring valves, voltage stabilization pipelines, voltage stabilization valves, air supplying pipelines, air supplying adjustment valves, pulverized coal flow adjustment valves and pulverized coal flowmeters, wherein the multiple injection tanks are arranged in parallel, the fluidization tanks are arranged at the bottoms of the injection tank, the injection branch pipes are connected with the outlets of the injection tanks, the coal power injection valves are arranged on the injection branch pipes, the pressurizing pipelines are connected with the injection tank, the voltage stabilization pipelines are connected with the injection tanks, the voltage stabilization valves, the air supplying pipelines, the air supplying adjustment valves, the pulverized coal flow adjustment valves and the pulverized coal flowmeter are arranged on the voltage stabilization pipelines. The injection header pipe is vertically arranged. The pulverized coal flow adjustment valves and the pulverized coal flowmeters are arranged on the injection header pipe from bottom to top. The air supplying pipelines are connected at the bottom end of the injection header pipe; the air supplying adjustment valves are arranged on the injection header pipe below connecting parts between multiple injection branch pipes and the injection header pipe. The pulverized coal injection system has the advantages that the uniform and stable injection of pulverized coal and the accurate control on injection amount can be realized, a pulverized coal concentrated phase conveying technology can also be satisfied, and the effects of low gas consumption and little pipeline abrasion are achieved.
Description
Technical field
The utility model belongs to metallurgical technology field, relates in particular to a kind of Pulverized Coal Injection System with Fuzzy.
Background technology
In the process of pulverized coal injection in blast furnace, uniform and stable winding-up and winding-up amount accurately control are to improve one of coal injection system reliability, assurance blast furnace burden direct motion essential condition, and its core is uniform and stable property, adjustability, the economy of the process of jetting.Uniform and stable property is namely: the winding-up process is continuous, and the fluctuation of winding-up amount is little; Adjustability is namely: according to the blast furnace operating needs, in time the regulation blowing amount satisfies the blast furnace hearth thermal system to the requirement of coal dust amount; Economy is namely: reducing production costs under the prerequisite of safe and reliable production, mainly is to reduce the delivering gas flow.
At present, existing and pot type coal injection system mainly comprises two or more winding-up tanks of arranging side by side, the winding-up arm that links to each other with each injection tube outlet and the winding-up house steward who links to each other with the outlet of a plurality of winding-up arms.This winding-up house steward is for being horizontally disposed with.Be provided with air compensation device this winding-up house steward, this air compensation device is arranged on the winding-up house steward place of a plurality of winding-up arms after converging.This air compensation device is connected with the vertically disposed tonifying Qi variable valve with this winding-up house steward, yet there is following problem in this design:
One, owing to the air compensation device self structure designs so that can produce local dip at coal powder injection pipeline admission place, the local easily wearing and tearing of air compensation device and pipeline, some coal powder injection apparatus of blast furnace is in order to extend working time, pipeline is installed an air compensation device between each winding-up tank and winding-up house steward, but can increase cost so again, and make complex system;
Two, air compensation device is arranged on the winding-up house steward place of level, because the coal dust in the concentrated phase transfer line can form " density stream " at the pipeline lower section under action of gravity, make-up gas is unbalanced with contacting of coal dust, forms easily larger pulsation, makes the fluctuation of winding-up amount larger;
Three, because air compensation device is arranged on the winding-up house steward place of a plurality of winding-up arms after converging, cause easily winding-up arm and the probability of the stifled powder in winding-up house steward junction to increase.
Simultaneously, existing and pot type coal injection system also have the winding-up amount can not fine adjustment, the easy problem such as obstruction of inhomogeneous, the injection tube appearance of a street of winding-up.
The utility model content
The technical problems to be solved in the utility model is: a kind of Pulverized Coal Injection System with Fuzzy that can uniform and stable winding-up is provided.
The utility model is to solve the problems of the technologies described above the technical scheme of taking to be:
A kind of Pulverized Coal Injection System with Fuzzy, is arranged on the coal powder injection valve on each winding-up arm, the winding-up house steward who links to each other with the outlet of a plurality of described winding-up arms, the pressurising pipeline that links to each other with each winding-up tank, is arranged on equalizer valve, the voltage stabilizing pipeline that links to each other with each tank of jetting on the described pressurising pipeline, is arranged on pressure maintaining valve, tonifying Qi pipeline, tonifying Qi variable valve, pulverized coal flow variable valve on the described voltage stabilizing pipeline, reaches coal power flowmeter the winding-up arm that it comprises a plurality of winding-up tanks of arranging side by side, be arranged on the streaming tank of each winding-up pot bottom, link to each other with each winding-up tank outlet; It is characterized in that, described winding-up house steward vertically arranges, described pulverized coal flow variable valve and coal power flowmeter are arranged on the described winding-up house steward from bottom to top, described tonifying Qi pipeline is connected in described winding-up house steward's bottom, described tonifying Qi variable valve is arranged on the winding-up house steward, described tonifying Qi variable valve is arranged on the below of a plurality of described winding-up arms and described winding-up house steward junction, and described pulverized coal flow variable valve and coal power flowmeter are arranged on the top of a plurality of described winding-up arms and described winding-up house steward junction.
In the such scheme, described Pulverized Coal Injection System with Fuzzy also comprises bottom pressurising branch road and is arranged on lower equalizer valve on the described bottom pressurising branch road, the inlet end of described bottom pressurising branch road links to each other with described pressurising pipeline, and the outlet side of described bottom pressurising branch road links to each other with the tapering of described winding-up tank.
In the such scheme, described Pulverized Coal Injection System with Fuzzy also comprises and each tapering fluidisation pipeline of linking to each other of winding-up tank, the bottom fluidization pipeline that links to each other with each winding-up tank, the bottom fluidization variable valve that is arranged on the tapering fluidisation variable valve of described tapering fluidisation pipeline and is arranged on described bottom fluidization pipeline, described tapering fluidisation pipeline, bottom fluidization pipeline, reaches the voltage stabilizing pipeline and is connected in same supply air line.
Compared with prior art, the technique effect obtained of the utility model is:
1) tonifying Qi variable valve of the present utility model is arranged on the winding-up house steward of vertical setting, design can be when guaranteeing to finish the tonifying Qi regulatory function like this, reduced air compensation device equipment, the pipeline and himself wearing and tearing that itself are brought by air compensation device equipment have not existed in the utility model naturally; The utility model adopts the mode in winding-up house steward one end tonifying Qi, so that supplemental air flow evenly distributes on cross-section of pipeline, has reduced wearing and tearing;
2) because tonifying Qi point below a plurality of described winding-up arms and described winding-up house steward junction, can reduce the probability of the stifled powder of winding-up arm and winding-up house steward junction;
3) because supplemental air flow evenly distribution on cross-section of pipeline, with the winding-up house steward in primary mixture be that face contacts, tonifying Qi and the disturbance of primary mixture point of contact are little, be conducive to the stable conveying of coal dust, satisfying reduction delivering gas consumption under pipeline smooth delivery of power coal dust (not plugging) prerequisite, be conducive to the coal powder injection concentrated phase and carry;
4) the tonifying Qi point is located at vertical winding-up house steward and is conducive to the gas powder and mixes, and can avoid the impact of " density stream ", makes the winding-up amount stable;
5) coal power flowmeter is installed on the vertical winding-up house steward, is conducive to improve the coal power flowmeter accuracy of measurement.Because the pulverized coal flow measurement is relevant with flow velocity and coal powder density.If be located on the pipeline of level, because " density stream " can cause concentration distribution uneven, thereby affect Measuring Precision;
6) adopt controlling valve of voltage regulation can realize the adjusting of winding-up amount one-level; Adopt simultaneously pulverized coal flow variable valve and coal power flowmeter to form closed circuit control loop, can realize the adjusting of winding-up amount secondary, in real time fine adjustment winding-up amount;
7) the winding-up tank top pressurising tank tapering pressurising of jetting simultaneously, and properly distributed winding-up tank top and tapering pressurized gas flow help the loose fluidisation of coal dust in the tank, make winding-up more even;
8) mode that adopts winding-up tank pressurising steam line and winding-up voltage stabilizing and fluidisation steam line to separate air feed, when avoiding jetting the tank pressurising owing to large flow reduces winding-up voltage stabilizing, fluidisation supply gas pressure, thereby avoid the winding-up process to produce pulsation, play the effect of uniform and stable winding-up, reduce the probability of winding-up line clogging.
Therefore, the utility model both can realize that the uniform and stable winding-up of coal dust and winding-up amount accurately controlled, also can satisfy coal dust concentrated phase conveying technology namely with high delivery ratio, low flow velocity pulverized coal conveying, reach low gas consumption, less pipeline wearing and tearing, uniform and stable winding-up effect.
Description of drawings
The structural representation of the Pulverized Coal Injection System with Fuzzy that Fig. 1 provides for the utility model embodiment.
Among the figure: the 1-tank of jetting, 2-streaming tank, the 3-arm of jetting, 4-coal powder injection valve, the 5-house steward that jets, 6-pressurising pipeline, 7-equalizer valve, 8-voltage stabilizing pipeline, the 9-pressure maintaining valve, 10-tonifying Qi pipeline, 11-tonifying Qi variable valve, 12-pulverized coal flow variable valve, 13-coal power flowmeter, 14-bottom pressurising branch road, equalizer valve under the 15-, 16-tapering fluidisation pipeline, 17-bottom fluidization pipeline, 18-tapering fluidisation variable valve, 19-bottom fluidization variable valve, 20-supply air line.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples, and certain following embodiment should not be construed as restriction of the present utility model.
As shown in Figure 1, the Pulverized Coal Injection System with Fuzzy that it provides for the utility model embodiment, it comprises three winding-up tanks 1 of arranging side by side, be arranged on the streaming tank 2 of each winding-up tank 1 bottom, the winding-up arm 3 that links to each other with each winding-up tank 1 outlet, be arranged on the coal powder injection valve 4 on each winding-up arm 3, the winding-up house steward 5 who links to each other with the outlet of three described winding-up arms 3, the pressurising pipeline 6 that links to each other with each winding-up tank 1, be arranged on the equalizer valve 7 on the described pressurising pipeline 6, the voltage stabilizing pipeline 8 that links to each other with each winding-up tank 1, be arranged on the pressure maintaining valve 9 on the described voltage stabilizing pipeline 8, tonifying Qi pipeline 10, tonifying Qi variable valve 11, pulverized coal flow variable valve 12, and coal power flowmeter 13.
This Pulverized Coal Injection System with Fuzzy also comprises bottom pressurising branch road 14 and is arranged on lower equalizer valve 15 on the bottom pressurising branch road 14, and the tapering fluidisation pipeline 16 that links to each other with each winding-up tank 1, the bottom fluidization pipeline 17 that links to each other with each tank 1 of jetting, the bottom fluidization variable valve 19 that is arranged on the tapering fluidisation variable valve 18 of described tapering fluidisation pipeline 16 and is arranged on bottom fluidization pipeline 17.The inlet end of bottom pressurising branch road 14 links to each other with pressurising pipeline 6, and the outlet side of bottom pressurising branch road 14 links to each other with the tapering of winding-up tank 1.Winding-up tank 1 adopts fluidisation top discharge form.Tapering fluidisation pipeline 16, bottom fluidization pipeline 17, and voltage stabilizing pipeline 8 be connected in same supply air line 20.
Need to prove, in Fig. 1, only express pressurising pipeline, equalizer valve, voltage stabilizing pipeline, pressure maintaining valve, bottom pressurising branch road, lower equalizer valve, tapering fluidisation pipeline, bottom fluidization pipeline, tapering fluidisation variable valve, and the bottom fluidization variable valve of one of them winding-up tank.In fact, other winding-up tank comprises these equipment too, does not show in the drawings.
The utility model embodiment also provides a kind of blast-furnace coal powder injection technique, it is characterized in that it may further comprise the steps:
1) one of them the winding-up tank 1 in a plurality of winding-up tanks that will arrange side by side fills powder, and all the other winding-up tanks do homework, until be in dormant state after satisfying the winding-up condition;
2) after the dress powder was finished, the equalizer valve 7 of opening pressurising pipeline 6 carried out pressurising;
3) after pressurising is finished, open the coal powder injection valve 4 that arranges on the winding-up arm 3 that links to each other with described winding-up tank 1 outlet, the coal dust drain tank that is blowed out is outward to the house steward 5 that jets, by being arranged on pulverized coal flow variable valve 12 and the coal power flowmeter 13 fine adjustment winding-up amounts on the winding-up house steward 5, winding-up house steward 5 vertically arranges, coal dust flows in winding-up house steward 5 from bottom to top, open simultaneously the tonifying Qi variable valve 11 that is arranged on the winding-up house steward 5 and carry out the tonifying Qi adjusting, tonifying Qi variable valve 11 is arranged on the winding-up arm 3 of a plurality of winding-up tanks and the below of winding-up house steward 5 junctions;
4) primary mixture that house steward 5 sends of will jetting sprays into blast furnace by divider and spray gun, and the pressure maintaining valve by the voltage stabilizing pipeline keeps the constant of winding-up tank internal pressure;
5) after described winding-up tank winding-up is finished, to all the other winding-up tank repeating steps 1) to 4).
Preferably, also comprise described step 2) and open simultaneously the step that pressurising is carried out in 15 pairs of winding-ups of lower equalizer valve tank, 1 tapering.
Preferably, also comprise tapering fluidisation variable valve 18 and 19 pairs of taperings of bottom fluidization variable valve of bottom fluidization pipeline 17 and the step that bottom section carries out fluidisation of opening simultaneously winding-up tank tapering fluidisation pipeline 16 described step 2).
Need to prove, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not break away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. Pulverized Coal Injection System with Fuzzy, it comprises a plurality of winding-up tanks of arranging side by side, be arranged on the streaming tank of each winding-up pot bottom, the winding-up arm that links to each other with each winding-up tank outlet, be arranged on the coal powder injection valve on each winding-up arm, the winding-up house steward who links to each other with the outlet of a plurality of described winding-up arms, the pressurising pipeline that links to each other with each winding-up tank, be arranged on the equalizer valve on the described pressurising pipeline, the voltage stabilizing pipeline that links to each other with each winding-up tank, be arranged on the pressure maintaining valve on the described voltage stabilizing pipeline, the tonifying Qi pipeline, the tonifying Qi variable valve, the pulverized coal flow variable valve, and coal power flowmeter; It is characterized in that, described winding-up house steward vertically arranges, described pulverized coal flow variable valve and coal power flowmeter are arranged on the described winding-up house steward from bottom to top, described tonifying Qi pipeline is connected in described winding-up house steward's bottom, described tonifying Qi variable valve is arranged on the winding-up house steward, described tonifying Qi variable valve is arranged on the below of a plurality of described winding-up arms and described winding-up house steward junction, and described pulverized coal flow variable valve and coal power flowmeter are arranged on the top of a plurality of described winding-up arms and described winding-up house steward junction.
2. Pulverized Coal Injection System with Fuzzy as claimed in claim 1, it is characterized in that, described Pulverized Coal Injection System with Fuzzy also comprises bottom pressurising branch road and is arranged on lower equalizer valve on the described bottom pressurising branch road, the inlet end of described bottom pressurising branch road links to each other with described pressurising pipeline, and the outlet side of described bottom pressurising branch road links to each other with the tapering of described winding-up tank.
3. Pulverized Coal Injection System with Fuzzy as claimed in claim 1 or 2, it is characterized in that, described Pulverized Coal Injection System with Fuzzy also comprises and each tapering fluidisation pipeline of linking to each other of winding-up tank, the bottom fluidization pipeline that links to each other with each winding-up tank, the bottom fluidization variable valve that is arranged on the tapering fluidisation variable valve of described tapering fluidisation pipeline and is arranged on described bottom fluidization pipeline, described tapering fluidisation pipeline, bottom fluidization pipeline, reaches the voltage stabilizing pipeline and is connected in same supply air line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415654 CN202881301U (en) | 2012-08-21 | 2012-08-21 | Pulverized coal injection system of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415654 CN202881301U (en) | 2012-08-21 | 2012-08-21 | Pulverized coal injection system of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202881301U true CN202881301U (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220415654 Withdrawn - After Issue CN202881301U (en) | 2012-08-21 | 2012-08-21 | Pulverized coal injection system of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202881301U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787191A (en) * | 2012-08-21 | 2012-11-21 | 中冶南方工程技术有限公司 | System and process for pulverized coal injection of blast furnace |
| CN103740875A (en) * | 2014-01-03 | 2014-04-23 | 山西太钢不锈钢股份有限公司 | Blast furnace injection device and method |
| CN115287383A (en) * | 2022-08-23 | 2022-11-04 | 孚洛泰(重庆)科技有限公司 | Blast furnace coal injection control method and control system |
-
2012
- 2012-08-21 CN CN 201220415654 patent/CN202881301U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787191A (en) * | 2012-08-21 | 2012-11-21 | 中冶南方工程技术有限公司 | System and process for pulverized coal injection of blast furnace |
| CN102787191B (en) * | 2012-08-21 | 2014-06-25 | 中冶南方工程技术有限公司 | System and process for pulverized coal injection of blast furnace |
| CN103740875A (en) * | 2014-01-03 | 2014-04-23 | 山西太钢不锈钢股份有限公司 | Blast furnace injection device and method |
| CN103740875B (en) * | 2014-01-03 | 2015-09-23 | 山西太钢不锈钢股份有限公司 | A kind of blast furnace injection device and blowing method |
| CN115287383A (en) * | 2022-08-23 | 2022-11-04 | 孚洛泰(重庆)科技有限公司 | Blast furnace coal injection control method and control system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20140625 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20140625 |
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| RGAV | Abandon patent right to avoid regrant |