CN215676346U - Waste heat circulating device of hot blast stove for mineral powder grinding - Google Patents
Waste heat circulating device of hot blast stove for mineral powder grinding Download PDFInfo
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- CN215676346U CN215676346U CN202122171760.7U CN202122171760U CN215676346U CN 215676346 U CN215676346 U CN 215676346U CN 202122171760 U CN202122171760 U CN 202122171760U CN 215676346 U CN215676346 U CN 215676346U
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Abstract
The utility model discloses a waste heat circulating device of a hot blast stove for mineral powder grinding, wherein an air inlet of the hot blast stove is respectively communicated with a primary fan and a secondary fan through an air inlet pipeline, an air outlet of the hot blast stove is respectively communicated with a mineral powder vertical mill and a chimney through an air outlet pipeline, the waste heat circulating device comprises a heat preservation chamber arranged outside the hot blast stove and is communicated with the air inlet of the primary fan through the hot blast pipeline, the outer wall of the hot blast pipeline is provided with a heat preservation layer, and hot air naturally emitted from the outer wall of the hot blast stove is used as an air inlet source of the primary fan. The utility model arranges the heat preservation chamber made of hot galvanizing section steel and steel plate outside the hot blast stove, and is connected with the air inlet of the primary fan through the hot blast pipeline, and the waste heat air naturally emitted from the shell of the hot blast stove is fully utilized as the air inlet source of the primary fan, and the original natural cold air inlet is transformed into the waste heat air inlet, thereby reducing the coal gas energy consumption and the production cost in the production process.
Description
Technical Field
The utility model relates to a waste heat circulating device of a hot blast stove for mineral powder grinding.
Background
At present, a hot blast stove for producing mineral powder vertical mill uses converter gas or blast furnace gas with low calorific value as main fuel, liquefied gas is ignited for stabilizing fire, hot air formed by fully mixing combustion products of the hot blast stove and secondary air is conveyed to a vertical mill system for slag milling through a pipeline for slag milling and drying, wherein the secondary air is natural air which is supplemented with air in the hot blast stove by about 20 ℃ through a secondary fan. The prior patent technology (application number 202021106931.7) of the inventor of the utility model is that a waste gas and residual heat air circulation loop is formed by designing a circulating air valve and a circulating air hot air pipeline, high-temperature hot flue gas discharged by a chimney is recycled and sent into a secondary air pipeline of a hot blast stove to replace natural air originally used by the secondary air pipeline, the coal gas consumption of the hot blast stove can be effectively reduced, and the pollution of the filtered flue gas discharge to the environment is reduced. In the production process, the inventor further finds that the hot blast stove is arranged at the joint of the mixing chamber of the hot blast stove and the vertical air pipe, the heat source of the mixing chamber of the hot blast stove is absorbed and diffused by the shell, and the surface temperature can reach more than 70 ℃, but no relevant report is provided for collecting and recycling the heat dissipation of the mixing chamber of the hot blast stove.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a waste heat circulating device of a hot blast stove for mineral powder grinding, wherein an air inlet of the hot blast stove is respectively communicated with a primary fan and a secondary fan through an air inlet pipeline, an air outlet of the hot blast stove is respectively communicated with a mineral powder vertical mill and a chimney through an air outlet pipeline, the waste heat circulating device comprises a heat preservation chamber arranged outside the hot blast stove and is communicated with the air inlet of the primary fan through a hot blast pipeline, the outer wall of the hot blast pipeline is provided with a heat preservation layer, and hot air naturally emitted from the outer wall of the hot blast stove is used as an air inlet source of the primary fan.
Preferably, the holding chamber is located outside the mixing chamber of the stove.
Preferably, the heat preservation chamber is formed by welding hot-dip galvanized steel plates, and small holes are formed in the steel plates and communicated with air.
Preferably, air volume regulating valves are arranged on air inlet pipelines of the primary air fan and the secondary air fan.
Preferably, a manual louver type adjusting valve is arranged on the hot air pipeline.
Preferably, the heat-insulating layer is heat-insulating cotton.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the utility model arranges the heat preservation chamber made of hot galvanizing section steel and steel plate outside the hot blast stove, and is connected with the air inlet of the primary fan through the hot blast pipeline, and the waste heat air naturally emitted from the shell of the hot blast stove is fully utilized as the air inlet source of the primary fan, and the original natural cold air inlet is transformed into the waste heat air inlet, thereby reducing the coal gas energy consumption in the production process.
(2) The waste heat circulating device is arranged outside a hot blast furnace of a mineral powder vertical mill system, can improve the heat efficiency of the vertical mill system, reduces the consumption of gas of the hot blast furnace, reduces the unit gas consumption from 37 cubic meters per ton to 35 cubic meters per ton, and can save the cost of the converter gas by about 60 ten thousand yuan per year by calculating with a single slag powder production line producing 50 ten thousand tons per year.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model to its proper form. It is clear that the drawings in the following description are only some embodiments, and that for a person skilled in the art, without inventive step, other drawings can also be derived from these drawings, in which:
FIG. 1 is a schematic structural diagram of a waste heat circulating device of a hot blast stove for mineral powder grinding in the embodiment;
the reference numbers are as follows: 1-mineral powder vertical mill, 2-hot blast stove, 3-secondary fan, 4-primary fan, 5-main exhaust fan, 6-chimney, 7-main dust collector, 8-heat preservation chamber, 9-manual shutter regulating valve, 10-air volume regulating valve and 11 hot air pipeline.
Detailed Description
The present invention will be described in detail with reference to examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be apparent to those skilled in the art that several modifications and improvements can be made without departing from the inventive concept. All falling within the scope of the present invention. The directional terms used in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., refer to the directions of the drawings for illustration and understanding, but not for limiting the present invention.
Fig. 1 exemplarily illustrates a waste heat recycling device of a hot blast stove for mineral powder grinding, an air inlet of a hot blast stove 2 is respectively communicated with a primary fan 4 and a secondary fan 3 through an air inlet pipeline, an air outlet is respectively communicated with a mineral powder vertical mill 1 and a chimney 6 through an air outlet pipeline, air volume adjusting valves 10 are respectively arranged on the air inlet pipelines of the primary fan 4 and the secondary fan 3, and hot air of the hot blast stove 2 sequentially passes through the mineral powder vertical mill 1, a main dust collector 7 and a main exhaust fan 5 to reach the chimney 6; the hot blast stove comprises a heat preservation chamber 8 arranged outside the hot blast stove 2 and communicated with an air inlet of a primary fan 4 through a hot blast pipeline 11, wherein a heat preservation layer is arranged on the outer wall of the hot blast pipeline 11, and hot air naturally emitted from the outer wall of the hot blast stove 2 is used as an air inlet source of the primary fan 4; wherein, the heat preservation chamber 8 is formed by welding hot galvanizing steel plates, small holes are arranged on the steel plates and communicated with air, and a manual shutter adjusting valve 9 is arranged on a hot air pipeline 11.
In some embodiments, the holding chamber 8 is located outside the mixing chamber of the stove 2.
In some embodiments, the insulation layer is insulation cotton.
When the mineral powder grinding hot blast stove waste heat circulating device works, the heat preservation chamber 8 is connected with the air inlet of the primary fan 4 through the hot air pipeline 11, which is communicated with an air inlet of a hot blast stove 2 through a primary air fan 4, adjusts and controls the air direction and the flow rate through a manual shutter adjusting valve 9 arranged on a hot air pipeline 11, leads hot air with the surface temperature of more than 70 degrees on the original hot blast stove to the air inlet of the primary air fan 4, closes an air quantity adjusting valve 10, the coal gas is conveyed into the hot blast stove 2 by the hot air supplementing mode of the primary fan 4, the consumption of the coal gas in the hot blast stove 2 is reduced, the purposes of energy saving, consumption reduction, cost reduction and efficiency improvement are achieved, the heat efficiency of the mineral powder vertical mill system is greatly improved, the coal gas consumption of the hot blast stove is reduced, the unit gas consumption can be reduced from 37 cubic meters per ton to 35 cubic meters per ton, the cost of converter gas can be saved by about 60 ten thousand yuan per year by calculating with a single slag powder production line which produces 50 ten thousand tons per year.
Claims (6)
1. The utility model provides a hot-blast furnace waste heat circulating device for powdered ore grinding, its characterized in that, the air intake of hot-blast furnace passes through the air-supply line respectively with primary air fan and secondary air fan intercommunication, air outlet through the air-out pipeline respectively with powdered ore vertical mill and chimney intercommunication, including set up in the outside heat preservation room of hot-blast furnace, and through hot-blast pipeline with the air intake intercommunication of primary air fan, be equipped with the heat preservation on the hot-blast pipeline outer wall, the steam that naturally gives off on the outer wall of hot-blast furnace is as the air inlet source of primary air fan.
2. The waste heat circulating device of the hot blast stove for the mineral powder grinding according to claim 1, wherein the heat preservation chamber is located outside a mixing chamber of the hot blast stove.
3. The waste heat recycling device of a hot blast stove for mineral powder grinding as claimed in claim 1, wherein the heat preservation chamber is welded by hot-dip galvanized steel plates, and the steel plates are provided with small holes communicated with air.
4. The waste heat recycling device of the hot blast stove for the mineral powder grinding as claimed in claim 1, wherein air volume adjusting valves are respectively arranged on air inlet pipelines of the primary fan and the secondary fan.
5. The waste heat circulating device of the hot blast stove for the mineral powder grinding as claimed in claim 1, wherein a manual louver type adjusting valve is arranged on the hot blast pipeline.
6. The waste heat circulating device of the hot blast stove for the mineral powder grinding as claimed in claim 1, wherein the heat insulating layer is heat insulating cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122171760.7U CN215676346U (en) | 2021-09-09 | 2021-09-09 | Waste heat circulating device of hot blast stove for mineral powder grinding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122171760.7U CN215676346U (en) | 2021-09-09 | 2021-09-09 | Waste heat circulating device of hot blast stove for mineral powder grinding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215676346U true CN215676346U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122171760.7U Active CN215676346U (en) | 2021-09-09 | 2021-09-09 | Waste heat circulating device of hot blast stove for mineral powder grinding |
Country Status (1)
| Country | Link |
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| CN (1) | CN215676346U (en) |
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2021
- 2021-09-09 CN CN202122171760.7U patent/CN215676346U/en active Active
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