CN87212002U - Heat supply device for coal powder-oxygen burning - Google Patents
Heat supply device for coal powder-oxygen burning Download PDFInfo
- Publication number
- CN87212002U CN87212002U CN 87212002 CN87212002U CN87212002U CN 87212002 U CN87212002 U CN 87212002U CN 87212002 CN87212002 CN 87212002 CN 87212002 U CN87212002 U CN 87212002U CN 87212002 U CN87212002 U CN 87212002U
- Authority
- CN
- China
- Prior art keywords
- oxygen
- pipe
- jet pipe
- cooler
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Abstract
The utility model discloses a heat supplying device for coal powder-oxygen burning. In the utility model, initial oxygen goes through a tangential cyclone into a gasifying chamber whose lining has fireproofing material for gasifying the coal and causing the slag of coal to be liquified; the second oxygen goes into the inside of a stove for fully combusting the coal gas and adding rigidity of the flame; the utility model uses high pressure water for forced cooling. The utility model has the advantages of long service life, few pollution, high efficiency, energy saving, easy ignition, stable combustion and tunable flame length and atmosphere. The utility model can be used for the electric stove, the converter and the open hearth for supplying heat for fusing and smelting. The utility model is favorable for the course of melting scrap steel and intensifying smelting and replaces electricity and oil with coal.
Description
The present invention provides the pulverized coal friring heating plant of second thermal source for smelting.
In recent years, on the various smelting equipments, utilize the burner of fuel-oxygen to provide second thermal source to be used widely.Wherein fine coal-oxygen combustion heating plant is also greatly developed.The pulverized coalapparatus type has sleeve type structure and spiral-flow type structure.The bushing type pulverized coalapparatus, fine coal and oxygen are difficult to mix, and realize that igniting and smooth combustion cause difficulty, and simultaneously, incomplete combustion causes the burnup height, the shortcoming that the thermal efficiency is low.The spiral-flow type burner has overcome the shortcoming of bushing type burner, and still, eddy flow brings the flame momentum little, the shortcoming that rigidity is little, and also design and operating parameter are selected improperly also imperfect combustion can occur.In order to be beneficial to fine coal and oxygen evenly mixes, and has certain muzzle velocity, the fine coal jet pipe that has the people once to adopt to have certain angle of the crossing and the burner of oxygen spray pipe structure.Among the GB2136556A, the jet pipe of employing center delivering oxygen and have the fine coal jet pipe of certain angle of the crossing α with the oxygen spray pipe axis, constitute asymmetric powder coaloust-oxygen gun, this device improves the degree of completing combustion, has increased the jet velocity of oxygen outlet, owing to mix the restriction that is subjected to the combustion space, influence the mixing of fine coal and oxygen, therefore, needed further to improve the spouting velocity of oxygen and fine coal, increase combustion intensity, improve flame rigidity and be restricted.
The objective of the invention is in order to overcome the shortcoming of above-mentioned fine coal-oxygen combustion train, guarantee the mixing of fine coal and oxygen, realize igniting and smooth combustion smoothly, have enough big flame propagation velocity, guarantee flame holding, to satisfy the requirement of heat fused solid material.Design that a kind of fine coal gasifies in advance and liquid deslagging last is the heating plant of gas combustion.
Structure of the present invention is seen accompanying drawing, it comprises center conveying fine coal jet pipe (3), once cure by oxygen therapy jet pipe (1), an oxygen nozzle (9) has two above tangential swirl devices (2) and plural cooling-water duct in parallel, pre-vaporizer (4), secondary oxygen therapy jet pipe (5), its spout and burner axis are the 15-30 degree angle of cut, cooler etc.Cooler (11) comprises cooler outer tube (6), cooler dividing plate (7) and cooler inner sleeve (8); Installed in its outer tube (6) and once cured by oxygen therapy jet pipe (1) and secondary oxygen therapy jet pipe (5); Fine coal jet pipe (8) is carried at the center of having installed in the cooler inner sleeve (8), the cooling-water duct in parallel (10) of an oxygen nozzle (9) has been linked up cooler outer tube (6) and inner sleeve (8), form the loop of cooling system, constituted the Forced water cooling system.Simultaneously, also be the safety measure of fine coal-oxygen combustion heating plant.
Pre-vaporizer of the present invention comprises the thickness of metal pipe-wall, sprayable refractory thin layer less than 15mm, and the refractory material laminar surface is the dross layer again, and its thickness is less than 10mm, and vaporizer is a device of realizing pulverized coal friring gasification and liquid deslagging in advance.
Oxygen nozzle of the present invention has more than one jet pipe, and the relative core jet pipe of jet pipe is arranged tangential, and its axis angle is the 15-70 degree.According to once curing by oxygen therapy jet pipe oxygen therapy amount for guaranteeing 40% of fine coal completing combustion requisite oxygen amount, the control of spray oxygen speed is less than under the 150m/S condition, calculate the jet size of an oxygen nozzle, every oxygen spray pipe on oxygen nozzle is all offered plural cooling water channel in parallel, with oxygen nozzle of multiple jets cooling.
Secondary oxygen spray pipe of the present invention is arranged in the water cooler outer tube, and its ejiction opening diameter is according to 60% of the required total oxygen demand of fine coal completing combustion, and control secondary oxygen gas flow rate designs secondary oxygen spray pipe outlet diameter less than the condition of 300m/S.The secondary oxygen spray pipe port of export is installed in around the pre-vaporizer outlet, and secondary oxygen spray pipe outlet section and burner axis are the 15-30 degree angle of cut, guarantees the coal gas and the completing combustion of secondary oxygen mix of pre-vaporizer ejection, and flame temperature can reach more than 2000 ℃.
The present invention is tangential motion from oxygen and the fine coal that oxygen nozzle and fine coal jet pipe eject, help the mixed of fine coal and oxygen, under the not enough condition of oxygen supply, carry out the gasification of fine coal, the ash content of the fuel gas heat fused fine coal of the high temperature that burning produces is liquid slag, and high-temperature combustible gas body temperature degree is controlled at less than 1800 ℃.Because being, gas in pre-vaporizer and fine coal rotatablely moves, melt cinder can stick on the pre-vaporizer refractory material wall equably, form the dross layer, its thickness is controlled at less than within the 15mm according to the cooling capacity of burning thermal discharge and cooling water, and unnecessary melt cinder is then discharged from pre-vaporizer.
Cooling system of the present invention, by the cooler outer tube, the cooling-water duct of oxygen nozzle parallel connection, the cooler inner sleeve is serially connected in the whole circulation cooling system.The plural secondary oxygen therapy of installing jet pipe between the outer wall of ring-shaped jacket pipe and the toroidal membrane, ring-shaped jacket inside pipe wall and dividing plate form the outlet pipe of outer tube, and it is connected with the cooling-water duct in parallel of an oxygen nozzle, connects with the inner sleeve of cooler again.Cooling water compiles the defeated fine coal pipe in inflow cooler inner sleeve cooling center through the cooling-water duct of the oxygen nozzle of cooler outer tube and multiply parallel connection, discharges cooling water at last.The water yield of combustion heat supplying device cooling system is to be controlled to be 10 ℃ according to thermal balance and the Inlet and outlet water temperature difference to calculate and determine that for preventing tube wall incrustation, calculating cooling water speed according to the rate of heat transfer equation is more than the 1.2m/S.Whole cooling system constitutes the security system of delivering oxygen and fine coal.
The present invention is used for providing on the smelting equipment thermal source, can utilize the waste heat igniting of electric arc furnaces, open hearth, converter, also can utilize the waste heat igniting of vaporizer inwall refractory material and slag blanket.After the pulverized coal friring gasification, form the high-temperature combustible gas body and form the outer flame that mixes with the burning of secondary oxygen mix again in the pre-vaporizer, realize stable completing combustion, flame temperature reaches more than 2000 ℃.Utilize the thermal-flame of high velocity jet to come heat fused steel scrap or other steel-making auxiliary material.Completing combustion degree and combustion intensity all can be regulated, with the oxidation-reduction quality of selecting suitable flame and the speed of flame.
The present invention is simple in structure, can reduce the pollution of FeO and flyash, and is safe and reliable to operation, has the function of coal gasification and gas combustion, is a kind of energy-efficient combustion heat supplying device, is used for smelting equipments such as electric arc furnaces, open hearth, converter, and second thermal source is provided.
Claims (5)
1, a kind of fine coal one oxygen combustion heating plant comprises and carries the fine coal jet pipe, and the oxygen therapy jet pipe is characterized in that central tube is to carry the fine coal jet pipe, and once cures by oxygen therapy jet pipe, an oxygen nozzle, pre-vaporizer, secondary oxygen therapy jet pipe, the water cooler of whole device.
2, according to the described combustion heat supplying device of claim 1, it is characterized in that oxygen nozzle one time, having oxygen spray pipe is tangential swirl device and cooling-water duct in parallel, the relative core jet pipe of jet pipe is arranged tangential, its axis angle is the 15-70 degree, each tangential swirl device on oxygen nozzle is all offered cooling water channel in parallel, adopts oxygen nozzle of multiple jets cooling.
3, according to the described combustion heat supplying device of claim 1, it is characterized in that thickness that pre-vaporizer comprises metal pipe-wall, sprayable refractory thin layer less than 15mm, the refractory surface layer evenly adheres to one deck slag and forms the dross layer.
4, combustion heat supplying device according to claim 1, it is characterized in that secondary oxygen therapy jet pipe is arranged in the outer tube of water cooler, the secondary oxygen spray pipe port of export be installed in the outlet of pre-vaporizer around, secondary oxygen spray pipe outlet section and burner axis are the 15-30 degree angle of cut.
5, combustion heat supplying device according to claim 1 is characterized in that cooler, comprises cooler outer tube, oxygen nozzle cooling-water duct, the cooler inner sleeve, and the three is connected into the whole circulation cooler.Installing secondary oxygen therapy jet pipe between the outer wall of ring-shaped jacket pipe and the toroidal membrane, the inwall of ring-shaped jacket pipe and dividing plate form the outlet pipe of outer tube, and it is connected with the cooling-water duct in parallel of an oxygen nozzle, connects with the cooler inner sleeve again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87212002 CN87212002U (en) | 1987-08-22 | 1987-08-22 | Heat supply device for coal powder-oxygen burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87212002 CN87212002U (en) | 1987-08-22 | 1987-08-22 | Heat supply device for coal powder-oxygen burning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87212002U true CN87212002U (en) | 1988-09-28 |
Family
ID=4826716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87212002 Withdrawn CN87212002U (en) | 1987-08-22 | 1987-08-22 | Heat supply device for coal powder-oxygen burning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87212002U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314921C (en) * | 2004-08-27 | 2007-05-09 | 尤潘垦 | Multiple group layer combustion-supporting gas making screen device for coal-turned-gas boiler |
-
1987
- 1987-08-22 CN CN 87212002 patent/CN87212002U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314921C (en) * | 2004-08-27 | 2007-05-09 | 尤潘垦 | Multiple group layer combustion-supporting gas making screen device for coal-turned-gas boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101297157B (en) | Low-nitrogen oxide combustion technique, device and uses | |
| US5042964A (en) | Flash smelting furnace | |
| CN202012913U (en) | Novel flue gas self-reflux low-oxygen combustor | |
| ES2206836T3 (en) | INJECTION BURNER OF PARTICLES. | |
| JP4440646B2 (en) | Method for thermometallurgical treatment of metal, metal melt and / or slag, and injector device | |
| US4077614A (en) | Steelmaking apparatus | |
| CN101233377B (en) | Method for calcination of a material with low NOx emissions | |
| CN101694297A (en) | Forced-draft burner and method for regularizing side-combustion high-temperature preheated air of square-box furnace | |
| CN201242149Y (en) | Burner system | |
| CN202392795U (en) | Gasification furnace burner used for asphalt gasification | |
| CN102794444A (en) | Heating method and system for controlling air ingress into enclosed spaces | |
| CN203980280U (en) | A kind of low NO xflue gas is from return flow burner | |
| CN201526966U (en) | Special burner used for circular internal combustion type blast-furnace gas power generation boiler and provided with cone fluidic device | |
| CN205482343U (en) | High -efficient heat accumulation formula non ferrous metal melting furnace | |
| CN102012029B (en) | Heat-storing combustion apparatus and biomass gas heating system | |
| US4168968A (en) | Steelmaking process | |
| CN87212002U (en) | Heat supply device for coal powder-oxygen burning | |
| CN110608438A (en) | Multi-stage burner, molten steel tank preheating equipment and using method thereof | |
| CN102243016B (en) | Reciprocating type porous medium gas burning metal smelting furnace | |
| CN201954970U (en) | Novel oxygen lance | |
| US4116611A (en) | Gaseous and liquid fuel burner | |
| CN105351922A (en) | Split-phase gasification low-nitrogen turbulent burner and control method thereof | |
| CN110553257A (en) | Novel high-efficiency low NO X burner | |
| CN201526965U (en) | Internal combustion blast-furnace gas power generation boiler dedicated burner with rectangular cone fluidic device | |
| CN116590056A (en) | Preheating system and preheating method of gasifying agent for fluidized bed gasifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |