Energy-saving modified gas hot blast stove and drying device for potash fertilizer manufacturing

Abstract

The utility model relates to an energy-saving modified gas hot blast stove and a drying device for potash fertilizer manufacturing. The energy-saving transformed gas hot-blast stove comprises a hot-blast stove body and a hot-blast stove air preheating system, the hot blast stove air preheating system comprises a natural air inlet, a circulating air duct, an outer heat preservation layer, an air blower, a combustion fan and a burner. The natural air inlet is communicated with the circulating air duct, the inner side of the circulating air duct is a furnace shell of the hot-blast stove body, and the outer side of the circulating air duct is the outer thermal insulation layer; natural air enters the circulating air duct from the natural air inlet and is preheated through heat exchange with a furnace shell of the hot-blast stove body, and preheated hot air is pumped to the hot-blast stove body and the combustion engine through the air blower and the combustion-supporting fan respectively. The energy-saving device is simple in structure, convenient to process and manufacture, capable of effectively utilizing heat radiation of the shell of the gas hot-blast stove, obvious in energy-saving effect and capable of greatly reducing energy consumption of the gas hot-blast stove.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy-saving of gas hot blast furnaces, and specifically relates to an energy-saving modified gas hot blast furnace, and a drying device for potash fertilizer manufacturing based on the gas hot blast furnace. Background Art

[0002] Gas hot air furnace is widely used in potash fertilizer manufacturing and drying processes. In the production of potash fertilizer manufacturing and drying process, the furnace mouth of the gas hot air furnace is connected to the rotary drying kiln, and the wet materials are dried through the gas hot air furnace. The function of the hot air furnace is to provide sufficient heat and air volume to the rotary drying kiln by burning combustible gases such as natural gas to dry the wet materials.

[0003] At present, gas hot blast furnaces consume a lot of energy, and it is necessary to further improve energy utilization and achieve energy conservation and environmental protection. Existing patent CN113606574A discloses a high-temperature, low-nitrogen, high-efficiency preheating, energy-saving and environmentally friendly hot blast furnace, and CN113718077A discloses a flue gas recycling system that can achieve micro-emission of hot blast furnaces, but these devices are relatively complex in structure, with high cost of use, and the energy-saving effect needs to be further improved. Utility Model Content

[0004] In view of the above problems, the utility model provides a gas hot blast furnace with energy-saving transformation.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A gas-fired hot blast furnace with energy-saving transformation comprises a hot blast furnace body and a hot blast furnace air preheating system arranged on the furnace shell of the hot blast furnace body; the hot blast furnace air preheating system comprises a natural wind inlet, a circulating air duct, an outer thermal insulation layer, a blower, a combustion-supporting fan, and a burner; the natural wind inlet is connected to the circulating air duct, the inner side of the circulating air duct is the furnace shell of the hot blast furnace body, and the outer side of the circulating air duct is the outer thermal insulation layer; natural wind enters the circulating air duct from the natural wind inlet, and is preheated by heat exchange with the furnace shell of the hot blast furnace body, and the preheated hot air is pumped to the hot blast furnace body and the burner by the blower and the combustion-supporting fan respectively.

[0007] Furthermore, the hot air pumped into the hot blast stove body is used to increase the air volume in the hot blast stove, and the hot air pumped into the burner is used to mix with natural gas to assist combustion.

[0008] Furthermore, the circulating air duct includes a first branch circulating air duct and a second branch circulating air duct. After the natural wind enters from the natural wind inlet, it enters the first branch circulating air duct and the second branch circulating air duct respectively and is preheated through heat exchange. The preheated hot air is gathered in the hot air gathering area at the front end of the hot blast furnace, and is drawn to the hot blast furnace body and the burner by the blower and the combustion-supporting fan respectively.

[0009] Furthermore, the first branch circulation air duct and the second branch circulation air duct are separated by a steel plate.

[0010] Furthermore, a thermocouple and a wind pressure transmitter are installed in the hot air collection area, and the thermocouple and the wind pressure transmitter transmit the temperature and wind pressure signals to the burner automatic control system to monitor the hot air temperature and the air pressure in the hot air collection area.

[0011] A drying device for potash fertilizer production comprises a rotary drying kiln and the above-mentioned energy-saving modified gas hot blast furnace, wherein the furnace mouth of the gas hot blast furnace is connected to the rotary drying kiln, and the gas hot blast furnace provides the rotary drying kiln with sufficient heat and air volume for drying wet materials.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model has the advantages of simple structure, convenient processing and manufacturing, can effectively utilize the heat radiation of the gas hot blast furnace shell, has obvious energy-saving effect, and greatly reduces the energy consumption of the gas hot blast furnace.

[0014] The energy-saving gas hot blast furnace of the utility model can be used in the production of potash fertilizer manufacturing drying process. The furnace mouth of the gas hot blast furnace is connected to the rotary drying kiln. The gas hot blast furnace provides sufficient heat and air volume to dry the wet materials to the rotary drying kiln. The hot air pumped to the burner is mainly used to form a mixed gas with natural gas to assist combustion. The hot air pumped to the hot blast furnace is mainly used to increase the air volume flowing to the rotary drying kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the overall structure of a gas hot blast furnace that has been transformed for energy saving in one embodiment.

[0016] Figure 2 yes Figure 1 A cross-sectional view of a gas hot blast stove that has undergone energy-saving transformation is shown.

[0017] Figure 3 It is a schematic diagram of the first branch circulation air duct and the second branch circulation air duct of the gas hot blast furnace that is energy-saving modified in another embodiment. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below through specific embodiments and drawings.

[0019] The utility model discloses a gas hot air furnace with energy-saving modification, the overall structure of which is as follows Figure 1 As shown, the hot blast furnace comprises a hot blast furnace body 100 and a hot blast furnace air preheating system 200 arranged on the furnace shell of the hot blast furnace body 100. Figure 1 and Figure 2 As shown, the hot blast furnace air preheating system 200 includes a natural wind inlet 201, a circulating air duct 202, an outer thermal insulation layer 203, a blower 204, a combustion-supporting fan 205, and a burner 206. The natural wind inlet 201 is connected to the circulating air duct 202, the inner side of the circulating air duct 202 is the furnace shell 101 of the hot blast furnace body 100, and the outer side of the circulating air duct 202 is the outer thermal insulation layer 203.

[0020] The blower 204 and the combustion-supporting blower 205 extract the natural wind outside the workshop, and the natural wind enters the circulating air duct 202 from the natural wind inlet 201, and performs heat exchange with the furnace shell 101 of the hot blast furnace body 100. After preheating, the hot air is pumped to the hot blast furnace body 100 and the burner 206 by the blower 204 and the combustion-supporting blower 205 respectively. Among them, the hot air pumped to the hot blast furnace body 100 is used to increase the air volume in the hot blast furnace, and the hot air pumped to the burner 206 is used to mix with natural gas for combustion. The utility model has a simple structure, is easy to process and manufacture, can effectively utilize the heat radiation of the shell of the gas hot blast furnace, has obvious energy-saving effect, and greatly reduces the energy consumption of the gas hot blast furnace.

[0021] In another embodiment of the utility model, the hot blast furnace air preheating system 200 divides the hot blast furnace into two sets of circulating air ducts for air preheating along the circumference, that is, the circulating air duct 202 includes a first branch circulating air duct 2021 and a second branch circulating air duct 2022. Figure 3 As shown, the first branch circulation air duct 2021 and the second branch circulation air duct 2022 are separated by a steel plate 208. Figure 3It is only a schematic diagram. In the actual production process, the size and position of the steel plate can be specifically set according to the size and shape of the furnace shell of the hot blast furnace body 100. After the cold air enters from the natural wind inlet 201, it enters two sets of air preheating circulation ducts respectively, and heat exchange is carried out in the circulation ducts. The hot air after heat exchange is collected in the hot air collection area 207 at the front end of the hot blast furnace, and is pumped to the hot blast furnace body 100 and the burner 206 by the blower 204 and the combustion-supporting blower 205 respectively. Among them, the hot air pumped to the hot blast furnace body 100 is used to increase the air volume in the hot blast furnace, and the hot air pumped to the burner 206 is used to mix with natural gas for combustion. In this embodiment, the air preheating system is divided into two sets, and each set of air preheating system is divided into circulation ducts along the longitudinal direction of the hot blast furnace shell. It is mainly to fully carry out heat exchange and ensure sufficient air volume.

[0022] A K-type thermocouple and an air pressure transmitter are installed in the hot air gathering area 207 to transmit the temperature and air pressure signals to the original burner automatic control system, so as to conveniently monitor the hot air temperature and the air pressure in the hot air gathering area 207.

[0023] The energy-saving gas hot blast furnace of the utility model can be used in the production of potash fertilizer manufacturing drying process, realizing a drying device for potash fertilizer manufacturing, including a rotary drying kiln and the above-mentioned energy-saving gas hot blast furnace, wherein the furnace mouth of the gas hot blast furnace is connected to the rotary drying kiln, and the gas hot blast furnace is used to dry the wet materials. The function of the hot blast furnace is to provide sufficient heat and air volume to the rotary drying kiln by burning combustible gases such as natural gas, so as to dry the wet materials. The hot air pumped to the burner is mainly used to form a mixed gas with natural gas to assist combustion, and the hot air pumped to the hot blast furnace is mainly used to increase the air volume flowing to the rotary drying kiln.

[0024] The specific embodiments of the utility model disclosed above are intended to help understand the content of the utility model and implement it accordingly. Those skilled in the art can understand that various replacements, changes and modifications are possible without departing from the spirit and scope of the utility model. The utility model should not be limited to the contents disclosed in the embodiments of this specification, and the scope of protection of the utility model shall be based on the scope defined in the claims.

Claims

1. A gas hot blast furnace for energy saving transformation, characterized in that: It comprises a hot blast furnace body and a hot blast furnace air preheating system arranged on the furnace shell of the hot blast furnace body; the hot blast furnace air preheating system comprises a natural wind inlet, a circulating air duct, an outer thermal insulation layer, a blower, a combustion-supporting fan, and a burner; the natural wind inlet is connected to the circulating air duct, the inner side of the circulating air duct is the furnace shell of the hot blast furnace body, and the outer side of the circulating air duct is the outer thermal insulation layer; natural wind enters the circulating air duct from the natural wind inlet, and is preheated by heat exchange with the furnace shell of the hot blast furnace body, and the preheated hot air is respectively pumped to the hot blast furnace body and the burner by the blower and the combustion-supporting fan.

2. The energy-saving gas hot blast stove according to claim 1 is characterized in that: The hot air pumped into the hot blast furnace body is used to increase the air volume in the hot blast furnace, and the hot air pumped into the burner is used to mix with natural gas for combustion.

3. The energy-saving gas hot blast stove according to claim 1 is characterized in that: The circulating air duct comprises a first branch circulating air duct and a second branch circulating air duct. After natural air enters from a natural wind air inlet, it respectively enters the first branch circulating air duct and the second branch circulating air duct and is preheated through heat exchange. The preheated hot air is gathered in the hot air gathering area at the front end of the hot blast furnace and is respectively pumped to the hot blast furnace body and the burner by the blower and the combustion-supporting fan.

4. The energy-saving gas hot blast stove according to claim 3 is characterized in that: The first branch circulation air duct and the second branch circulation air duct are separated by a steel plate.

5. The energy-saving gas hot blast stove according to claim 3 is characterized in that: Thermocouples and wind pressure transmitters are installed in the hot air collection area, and the thermocouples and wind pressure transmitters transmit temperature and wind pressure signals to the burner automatic control system to monitor the hot air temperature and the air pressure in the hot air collection area.

6. A drying device for potash fertilizer production, characterized in that: The invention comprises a rotary drying kiln and a gas hot blast furnace of energy-saving transformation as described in any one of claims 1 to 5, wherein the furnace mouth of the gas hot blast furnace is connected to the rotary drying kiln, and the gas hot blast furnace provides the rotary drying kiln with sufficient heat and air volume for drying wet materials.

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