CN220250692U - Indirect heat exchange system of yellow phosphorus electric stove combustible tail gas - Google Patents
Indirect heat exchange system of yellow phosphorus electric stove combustible tail gas Download PDFInfo
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- CN220250692U CN220250692U CN202320129466.6U CN202320129466U CN220250692U CN 220250692 U CN220250692 U CN 220250692U CN 202320129466 U CN202320129466 U CN 202320129466U CN 220250692 U CN220250692 U CN 220250692U
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- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000002485 combustion reaction Methods 0.000 claims abstract description 72
- 230000002093 peripheral effect Effects 0.000 claims abstract description 22
- 238000005260 corrosion Methods 0.000 claims abstract description 20
- 230000007797 corrosion Effects 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 55
- 238000005338 heat storage Methods 0.000 claims description 23
- 239000002131 composite material Substances 0.000 claims description 20
- 239000011232 storage material Substances 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011574 phosphorus Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
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Abstract
The utility model provides an indirect heat exchange system of combustible tail gas of a yellow phosphorus electric furnace, which belongs to the technical field of combustion equipment in phosphorus chemical industry and comprises a double-layer tower type combustion furnace, a hot air conduit, a combustible tail gas inlet mechanism and a combustion-supporting air inlet mechanism; wherein the double-layer tower type combustion furnace is divided into a peripheral part and a core part; the combustible tail gas inlet mechanism is connected to the lower end of the core part of the double-layer tower type combustion furnace, and the combustion-supporting air inlet mechanism is connected to the middle part of the combustion-supporting air inlet mechanism; according to the utility model, the double-layer tower type combustion furnace is arranged to burn yellow phosphorus tail gas at the peripheral part with the temperature-resistant anti-corrosion material layer, and then heat generated by combustion is transferred or stored through heated air, so that the hot corrosion or acid substance corrosion generated by a direct heating boiler can be effectively prevented; the double-layer tower type combustion furnace provided by the utility model has a hearth with a necking structure, and the combustion air inlet pipe with a spiral structure is matched, so that the yellow phosphorus tail gas and the combustion air can be effectively promoted to be fully mixed in the hearth, and the combustion efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of combustion equipment in the phosphorus chemical industry, in particular to an indirect heat exchange system for combustible tail gas of a yellow phosphorus electric furnace.
Background
China is a large world yellow phosphorus production country, and the yellow phosphorus production capacity is 110 ten thousand tons/year. With the development and the growth of the phosphorus chemical industry, the yellow phosphorus tail gas emission in China is continuously increased. The yellow phosphorus tail gas produced per year in China exceeds 27.5 hundred million cubic meters according to the calculation of 2500-3000 cubic meters of tail gas produced per 1 ton of yellow phosphorus, but the utilization rate is always low, so that huge energy waste and large discharge of pollutants such as carbon dioxide, dust, sulfur dioxide, fluoride and the like are caused.
Because the existing yellow phosphorus 'three wastes' emission standard is coarser, no specific limit emission is specified, the restriction force on enterprises is smaller, and the enthusiasm of enterprises for utilizing yellow phosphorus tail gas is low. Meanwhile, the yellow phosphorus tail gas has complex structure, various pollutant types, high toxicity and high purification treatment difficulty, and is truly advanced, feasible and practical, and the yellow phosphorus tail gas purification technology has a flexible index, so that the policy of exiting the station in various places is extremely poor, and the utilization rate of the yellow phosphorus tail gas is only about 20%.
Besides the low enthusiasm of enterprises caused by higher treatment cost, the technical difficulty of yellow phosphorus tail gas treatment is higher even if the factor of high treatment cost is set aside.
The yellow phosphorus tail gas has complex components, contains high corrosion impurities such as phosphorus, sulfur, arsenic, fluorine and the like and a small amount of water besides mainly contains C0, and particularly contains the phosphorus, the sulfur, the arsenic, the fluorine and the like which have stronger corrosion action on metals during combustion, so that the yellow phosphorus tail gas can be used as boiler fuel to cause corrosion failure of boiler part materials, and the service life of equipment is greatly shortened. In addition, SO is also contained in yellow phosphorus tail gas 2 、H 2 S, pn, etc., where P and H are more environmentally hazardous gases 2 S combustion to generate P 2 O 5 And SO 2 Forms phosphoric acid and sulfuric acid with extremely strong corrosiveness after meeting water in the air, and has PH 3 And H 2 S causes the metallic material to generate serious high-temperature sulfuration, phosphatization, oxidation and other corrosion, greatly shortens the service life of the material, wastes important and precious carbon monoxide resources on one hand, and aggravates the pollution of the atmosphere environment.
Therefore, the yellow phosphorus tail gas is directly used as fuel for heat conversion, namely, the heating boiler is converted into hot water and steam, or the modes of drying ores after the bracket is ignited in the rotary kiln cannot avoid corrosion damage of corrosion components to the boiler or metal parts of the rotary kiln, and pollution caused by emission of harmful substances cannot be avoided, so that the yellow phosphorus tail gas treatment and utilization of the traditional direct energy conversion mode has a large optimizing and improving space.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides an indirect heat exchange system for the combustible tail gas of the yellow phosphorus electric furnace, which adopts a novel heat exchange form and a novel heat exchange structure, improves the combustion efficiency and the combustion temperature of the yellow phosphorus tail gas, ensures that the yellow phosphorus tail gas is rapidly converted into hot air containing heat and is further sent to a position requiring the heat, eliminates corrosion of acidic substances generated by direct combustion heat exchange on a traditional boiler, and provides a novel mode for utilizing the yellow phosphorus tail gas.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: an indirect heat exchange system of the combustible tail gas of the yellow phosphorus electric furnace comprises a double-layer tower type combustion furnace, a hot air conduit, a combustible tail gas inlet mechanism and a combustion-supporting air inlet mechanism; wherein, the double-layer tower type combustion furnace is a core component and is divided into a peripheral part and a core part, wherein the top of the peripheral part is communicated with a hot air duct; in addition, the combustible tail gas inlet mechanism is connected to the lower end of the core part of the double-layer tower type combustion furnace, and the combustion-supporting air inlet mechanism is connected to the middle part of the core part.
The lower end of the peripheral part of the double-layer tower type combustion furnace is provided with an opening, the opening is equally divided into three parts from bottom to top, hollow cylinders with equal diameters D are arranged from the lower end to the middle part, and a composite structure section is arranged from the middle part to the top end, and comprises a connecting section, a pressurizing section, a suction section and a diverging section; the connecting section is connected with the hollow cylinder with the same diameter, the pressurizing section is arranged above the connecting section, the lower end of the sucking section is connected with the pressurizing section, and the upper end of the sucking section is connected with the diverging section.
The diameter of the connecting section is consistent with the inner diameter D of the hollow cylinder below, and the length of the connecting section accounts for 1/5 of the length of the composite structure section; the whole pressurizing section is a conical pipe with a cone angle of 15-20 degrees, the length of the conical pipe is 1/5 of that of the composite structure section, and the diameter of the inner hole is gradually reduced to 1/3D from D of the connecting section; the suction section is a tubular component with equal diameter, the diameter of the tubular component is consistent with the tail end of the pressurizing section, the diameter of the tubular component is 1/3D, and the length of the tubular component is 1/5 of that of the composite structure section; the shape of the divergent section is symmetrical with the midpoint of the pressurizing section along the suction section, and the whole conical tube with the cone angle of 8-10 degrees is formed, and the length of the conical tube accounts for 2/5 of the whole composite structure section.
The combustible tail gas inlet mechanism and the combustion-supporting air inlet mechanism are integrated on the core part of the double-layer tower type combustion furnace, wherein an air inlet pipe of the combustible tail gas inlet mechanism is arranged in the center, an air inlet pipe of the combustion-supporting air inlet mechanism is wrapped around the air inlet pipe, the two air inlet pipes form a concentric circle structure, an inlet of the air inlet pipe is arranged at the bottom end of the core part of the double-layer tower type combustion furnace, and the other end of the air inlet pipe is connected with the yellow phosphorus electric furnace tail gas purifying system; the inlet of the air inlet pipe is arranged on the side wall of the core part of the double-layer tower type combustion furnace, and the other end of the air inlet pipe is connected with an oxygen-enriched fan and a matched valve and pipeline; a plurality of spiral combustion-supporting air channels are arranged in the space between the air inlet pipe and the air inlet pipe, the starting point of each combustion-supporting air channel is positioned at the inlet of the air inlet pipe, and the middle point of each combustion-supporting air channel is positioned at the top end of the core part of the double-layer tower type combustion furnace.
In order to prevent when the heat supply is not needed in the heat utilization process, the heat generated by the double-layer tower type combustion furnace does not have the conveying purpose, and waste is caused, the top of the peripheral part of the double-layer tower type combustion furnace is communicated with the bottom of the heat storage tower through a hot air conduit, the heat storage materials are uniformly distributed in the heat storage tower, the other side of the bottom of the heat storage tower is connected with a fan and a cold air inlet, the top of the heat storage tower is connected with a chimney and a hot air outlet, the heat generated by the combustion of the double-layer tower type combustion furnace is led into the heat storage tower, the heat is heated, the heat is stored, and when the heat is needed in the heat utilization process, the heat in the heat storage material can be taken out through the fan and the cold air inlet, and the heat is conveyed to the heat utilization process through the hot air outlet.
The outer peripheral part of the double-layer tower type combustion furnace is a multi-layer composite cylindrical component, the outermost layer is a hard shell, the middle layer is a refractory heat-insulating material layer, the innermost layer is a temperature-resistant anti-corrosion material layer, and the material is coated on the inner side of the outer peripheral part of the double-layer tower type combustion furnace, so that the furnace wall can be effectively prevented from being directly contacted with corrosive gas generated by yellow phosphorus tail gas of combustion, and the furnace wall is effectively protected from corrosion at high temperature.
The utility model has the beneficial effects that:
(1) the utility model does not directly burn yellow phosphorus tail gas to heat the boiler for heat exchange, but adopts an indirect heat exchange mode, burns the yellow phosphorus tail gas at the peripheral part with the temperature-resistant anti-corrosion material layer by arranging the double-layer tower type combustion furnace, then transfers or stores heat generated by combustion through heated air, directly sends the heat to a heat utilization process or distributes the heat according to the requirement, and can effectively prevent hot corrosion or acid substance corrosion generated by the direct heating boiler.
(2) The double-layer tower type combustion furnace provided by the utility model is divided into a peripheral part and a core part; the peripheral part is provided with a hearth with a necking structure, and a venturi effect which can generate an upward suction effect without applying external force is formed by utilizing pressure change generated when gas flows through the necking part, so that yellow phosphorus tail gas and combustion air can be effectively promoted to be fully mixed in the hearth, and the combustion efficiency is improved; in addition, the core of the double-layer tower type combustion furnace integrates the air inlet pipe of yellow phosphorus tail gas and the air inlet pipe of combustion-supporting air together to form inner fuel gas and outer combustion-supporting air, and the combustion-supporting air inlet pipe is matched with the combustion-supporting air inlet pipe in a spiral structure, so that the combustion-supporting air is spirally upwards conveyed, the mixing degree and uniformity of the yellow phosphorus tail gas and the combustion-supporting air can be improved, the combustion efficiency is greatly improved, the full release of heat is facilitated, and black smoke and corrosive gas caused by incomplete combustion can be avoided.
Drawings
Fig. 1 is a schematic view of the heat exchange system described in embodiment 1.
Fig. 2 is a schematic view of the heat exchange system described in embodiment 2.
Fig. 3 is a schematic structural view of a double-deck tower burner.
In the figure, a double-layer tower type combustion furnace 1, a hot air conduit 2, a peripheral part 1-1, a core part 1-2, a connecting section 1-3, a pressurizing section 1-4, a suction section 1-5, a diverging section 1-6, an air inlet pipe 3, an air inlet pipe 4, an oxygen-enriched blower 5, a combustion-supporting air duct 6, a heat storage tower 7, a blower 8, a cold air inlet 9, a chimney 10, a hot air outlet 11, a hard shell 1-1a, a refractory heat insulation material layer 1-1b and a temperature-resistant and corrosion-resistant material layer 1-1c.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
Example 1
As shown in fig. 1 and 3, the indirect heat exchange system of the yellow phosphorus electric furnace combustible tail gas in the embodiment comprises a well-type bracket, a double-layer tower type combustion furnace 1, a hot air conduit 2, a combustible tail gas inlet mechanism and a combustion air inlet mechanism; the double-layer tower type combustion furnace 1 is integrally erected above the well type bracket, the peripheral part 1-1 of the double-layer tower type combustion furnace is fixed on the outer ring of the well type bracket, and the top of the peripheral part 1-1 is communicated with the hot air conduit 2; while the inner ring of the well type bracket supports the core part 1-2 of the double-layer tower type combustion furnace 1; in addition, the combustible tail gas inlet mechanism is connected to the lower end of the core part 1-2 of the double-layer tower type combustion furnace 1, and the combustion-supporting air inlet mechanism is connected to the middle part of the combustion-supporting air inlet mechanism.
The outer peripheral part 1-1 of the double-layer tower type combustion furnace 1 is a multi-layer composite cylindrical component, the outermost layer is a hard shell 1-1a, the middle layer is a refractory heat insulation material layer 1-1b, the innermost layer is a temperature-resistant anti-corrosion material layer 1-1c, the material is coated on the inner side of the outer peripheral part 1-1 of the double-layer tower type combustion furnace 1, the furnace wall can be effectively prevented from being directly contacted with corrosive gas generated by yellow phosphorus tail gas of combustion, and the furnace wall is effectively protected from corrosion at high temperature.
The lower end of the peripheral part 1-1 of the double-layer tower type combustion furnace 1 is provided with an opening, the opening is equally divided into three parts from bottom to top, hollow cylinders with equal diameters D are arranged from the lower end to the middle part, a composite structure section is arranged from the middle part to the top end, the composite structure section comprises a connecting section 1-3, a pressurizing section 1-4, a sucking section 1-5 and a diverging section 1-6, the connecting section 1-3 is connected with the hollow cylinders with equal diameters, the diameter of the connecting section is consistent with the inner diameter D of the hollow cylinders below, and the length of the connecting section is 1/5 of the composite structure section; the upper part of the connecting section 1-3 is provided with a pressurizing section 1-4, the whole body of the pressurizing section is a conical pipe with a cone angle of 20 degrees, the length of the pressurizing section is 1/5 of that of the composite structure section, and the diameter of the inner hole is gradually reduced from the D of the connecting section 1-3 to 1/3D; the suction section 1-5 is a tubular component with equal diameter, the diameter of the tubular component is consistent with the tail end of the pressurizing section 1-4, the diameter of the tubular component is 1/3D, and the length of the tubular component is 1/5 of the composite structure section; the tail end of the suction section 1-5 is connected with the divergence section 1-6, the shape of the divergence section is symmetrical to the midpoint of the pressurizing section 1-4 along the suction section 1-5, the whole is a conical pipe with the cone angle of 10 degrees, and the length of the conical pipe is 2/5 of the length of the whole composite structure section.
Example 2
Referring to fig. 2, the main structure of the indirect heat exchange system for the combustible tail gas of the yellow phosphorus electric furnace in this embodiment is identical to that described in embodiment 1, and is different in that the combustible tail gas inlet mechanism and the combustion air inlet mechanism are integrated together on the core 1-2 of the double-layer tower combustion furnace 1, wherein the air inlet pipe 3 of the combustible tail gas inlet mechanism is arranged at the center, the air inlet pipe 4 of the combustion air inlet mechanism is wrapped around the air inlet pipe 3, the two air inlet pipes form a concentric circle structure, the inlet of the air inlet pipe 3 is arranged at the bottom end of the core 1-2 of the double-layer tower combustion furnace 1, and the other end of the air inlet pipe 3 is connected with the tail gas purification system of the yellow phosphorus electric furnace; the inlet of the air inlet pipe 4 is arranged on the side wall of the core part 1-2 of the double-layer tower type combustion furnace 1, and the other end of the air inlet pipe 4 is connected with an oxygen-enriched blower 5 and a matched valve and pipeline; a plurality of spiral combustion-supporting air ducts 6 are arranged in the space between the air inlet pipe 3 and the air inlet pipe 4, the starting point of each combustion-supporting air duct 6 is positioned at the inlet of the air inlet pipe 4, and the middle point is positioned at the top end of the core part 1-2 of the double-layer tower type combustion furnace 1.
In addition, the top of the peripheral part 1-1 of the double-layer tower type combustion furnace 1 is communicated with the bottom of the heat storage tower 7 through a hot air conduit 2, heat storage materials are uniformly distributed in the heat storage tower 7, the other side of the bottom of the heat storage tower is connected with a fan 8 and a cold air inlet 9, the top of the heat storage tower is connected with a chimney 10 and a hot air outlet 11, heat generated by combustion of the double-layer tower type combustion furnace 1 is led into the heat storage tower 7, the heat storage materials in the tower are heated to heat, the heat is stored, and when heat supply is needed in a standby heat process, the heat in the heat storage materials can be carried out through the fan 8 and the cold air inlet 9, and the heat is sent to a heat utilization process through the hot air outlet 11.
Claims (6)
1. The indirect heat exchange system of the yellow phosphorus electric furnace combustible tail gas is characterized by comprising a double-layer tower type combustion furnace, a hot air conduit, a combustible tail gas inlet mechanism and a combustion-supporting air inlet mechanism; wherein, the double-layer tower type combustion furnace is divided into a peripheral part and a core part, and the top of the peripheral part is communicated with a hot air conduit; the combustible tail gas inlet mechanism is connected to the lower end of the core part of the double-layer tower type combustion furnace, and the combustion-supporting air inlet mechanism is connected to the middle part of the combustion-supporting air inlet mechanism;
the lower end of the peripheral part of the double-layer tower type combustion furnace is provided with an opening, the opening is equally divided into three parts from bottom to top, hollow cylinders with equal diameters D are arranged from the lower end to the middle part, and a composite structure section is arranged from the middle part to the top end, and comprises a connecting section, a pressurizing section, a suction section and a diverging section; the connecting section is connected with the hollow cylinder with the same diameter, the pressurizing section is arranged above the connecting section, the lower end of the sucking section is connected with the pressurizing section, and the upper end of the sucking section is connected with the diverging section.
2. The indirect heat exchange system of the yellow phosphorus electric furnace combustible tail gas according to claim 1 is characterized in that,
the diameter of the connecting section is consistent with the inner diameter D of the hollow cylinder below, and the length of the connecting section accounts for 1/5 of the length of the composite structure section;
the whole pressurizing section is a conical pipe with a cone angle of 15-20 degrees, the length of the conical pipe is 1/5 of that of the composite structure section, and the diameter of the inner hole is gradually reduced to 1/3D from D of the connecting section;
the suction section is a tubular component with equal diameter, the diameter of the tubular component is consistent with the tail end of the pressurizing section, the diameter of the tubular component is 1/3D, and the length of the tubular component is 1/5 of that of the composite structure section;
the shape of the divergent section is symmetrical with the midpoint of the pressurizing section along the suction section, and the whole divergent section is a conical pipe with the cone angle of 8-10 degrees, and the length of the divergent section accounts for 2/5 of the length of the whole composite structure section.
3. The indirect heat exchange system of the yellow phosphorus electric furnace combustible tail gas according to claim 1, wherein the combustible tail gas inlet mechanism and the combustion-supporting air inlet mechanism are integrated on the core part of the double-layer tower type combustion furnace, an air inlet pipe of the combustible tail gas inlet mechanism is arranged in the center, an air inlet pipe of the combustion-supporting air inlet mechanism is wrapped around the air inlet pipe, the two air inlet pipes form a concentric circle structure, an inlet of the air inlet pipe is arranged at the bottom end of the core part of the double-layer tower type combustion furnace, and the other end of the air inlet pipe is connected with the yellow phosphorus electric furnace tail gas purification system; the inlet of the air inlet pipe is arranged on the side wall of the core part of the double-layer tower type combustion furnace, and the other end of the air inlet pipe is connected with an oxygen-enriched fan and a matched valve and pipeline; a plurality of spiral combustion-supporting air channels are arranged in the space between the air inlet pipe and the air inlet pipe, the starting point of each combustion-supporting air channel is positioned at the inlet of the air inlet pipe, and the middle point of each combustion-supporting air channel is positioned at the top end of the core part of the double-layer tower type combustion furnace.
4. An indirect heat exchange system for combustible tail gas of a yellow phosphorus electric furnace according to any one of claims 1-3, wherein the top of the peripheral part of the double-layer tower type combustion furnace is communicated with the bottom of a heat storage tower through a hot air conduit, the heat storage tower is uniformly distributed with heat storage materials, the other side of the bottom of the heat storage tower is connected with a fan and a cold air inlet, the top of the heat storage tower is connected with a chimney and a hot air outlet, heat generated by combustion of the double-layer tower type combustion furnace is introduced into the heat storage tower to store heat, and the fan and the cold air inlet take out the heat in the heat storage materials.
5. An indirect heat exchange system for combustible tail gas of a yellow phosphorus electric furnace according to any one of claims 1-3, wherein the periphery of the double-layer tower type combustion furnace is a multi-layer composite cylindrical member, the outermost layer is a hard shell, the middle layer is a refractory heat-insulating material layer, and the innermost layer is a temperature-resistant corrosion-resistant material layer.
6. The indirect heat exchange system for the combustible tail gas of the yellow phosphorus electric furnace according to claim 4, wherein the periphery of the double-layer tower type combustion furnace is a multi-layer composite cylindrical member, the outermost layer is a hard shell, the middle layer is a refractory heat-insulating material layer, and the innermost layer is a temperature-resistant and corrosion-resistant material layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320129466.6U CN220250692U (en) | 2023-01-17 | 2023-01-17 | Indirect heat exchange system of yellow phosphorus electric stove combustible tail gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320129466.6U CN220250692U (en) | 2023-01-17 | 2023-01-17 | Indirect heat exchange system of yellow phosphorus electric stove combustible tail gas |
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| CN202320129466.6U Active CN220250692U (en) | 2023-01-17 | 2023-01-17 | Indirect heat exchange system of yellow phosphorus electric stove combustible tail gas |
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