CN213746751U - Smoke turbulence device for secondary combustion chamber of rotary kiln - Google Patents
Smoke turbulence device for secondary combustion chamber of rotary kiln Download PDFInfo
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- CN213746751U CN213746751U CN202021831311.XU CN202021831311U CN213746751U CN 213746751 U CN213746751 U CN 213746751U CN 202021831311 U CN202021831311 U CN 202021831311U CN 213746751 U CN213746751 U CN 213746751U
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Abstract
The utility model discloses a smoke turbulence device of a second combustion chamber of a rotary kiln, which achieves the purpose of prolonging the retention time of smoke in the second combustion chamber and relates to the technical field of the second combustion chamber of the rotary kiln, and the technical proposal is characterized in that a smoke buffer tube is provided with an air inlet and an air outlet which is communicated with an exhaust port of the second combustion chamber body and a combustion area of a burner, is vertically arranged and is wavy and is positioned in the second combustion chamber body; the air inlet cover is provided with an air-entraining port communicated with the smoke inlet of the secondary combustion chamber body, is connected with the air inlet of the smoke buffer tube and is clamped on the inner side wall of the periphery of the secondary combustion chamber body; the mixed wind mechanism is at least more than two and is distributed along the length direction of the pipe body of the smoke buffer pipe.
Description
Technical Field
The utility model belongs to the technical field of the second combustion chamber of rotary kiln, more specifically says, it relates to a second combustion chamber flue gas vortex device of rotary kiln.
Background
The rotary kiln type incinerator mainly comprises a rotary kiln and a secondary combustion chamber, wherein the rotary kiln mainly burns solid wastes, and the secondary combustion chamber effectively burns smoke with organic matters discharged from the rotary kiln so as to reduce the emission of harmful substances and further achieve the effect on the external environment.
The secondary combustion chamber is a cylinder body cast by refractory materials, the smoke is combusted in the cylinder body, and a combustor and a secondary air supply device are arranged, but the existing smoke stays in the cylinder body for a short time, so that the smoke is not uniformly mixed and combusted, organic matters in the high-temperature smoke are difficult to combust completely, and the emission standard of tail gas is influenced.
Chinese patent document No. CN201620631673.1 discloses a secondary combustion chamber for a rotary kiln, which comprises a cylinder cast from a refractory material. The barrel is vertically arranged, the upper end of the upper end side wall, the lower end of the lower end side wall and the upper end of the lower end side wall are respectively provided with a smoke exhaust port, a smoke inlet and a slag discharge port, a combustion port and a tuyere are arranged on the barrel wall between the smoke exhaust port and the smoke inlet, the combustion port is located above the tuyere, a combustor is arranged at the combustion port, and a fan is arranged at the tuyere. The inner concave section is composed of an upper conical section with a large upper part and a small lower part, a lower conical section with a small upper part and a large lower part and a short cylinder section between the upper conical section and the lower conical section, and the inner diameter and the outer diameter of the short cylinder section are respectively smaller than those of other sections of the cylinder. The second combustion chamber is suitable for an incinerator for incinerating garbage or dangerous objects.
However, the residence time of the flue gas in the cylinder is not long in the second combustion chamber of the rotary kiln, so that the combustion is insufficient.
Disclosure of Invention
The utility model aims at providing a rotary kiln second combustion chamber flue gas vortex device reaches the purpose of extension flue gas dwell time in the second combustion chamber.
The above technical purpose of the present invention can be achieved by the following technical solutions: a rotary kiln second combustion chamber flue gas vortex device includes:
the smoke buffer tube is provided with an air inlet and an air outlet which is communicated with the smoke outlet of the secondary combustion chamber body and the combustion area of the combustor, is vertically arranged and is wavy and is positioned in the secondary combustion chamber body;
the air inlet cover is provided with an air-entraining port communicated with the smoke inlet of the secondary combustion chamber body, is connected with the air inlet of the smoke buffer tube and is clamped on the inner side wall of the periphery of the secondary combustion chamber body;
the mixed air mechanisms are at least more than two and distributed along the length direction of the pipe body of the smoke buffer pipe, and comprise a fan, an annular pipe, an exhaust pipe and an air pipe;
wherein, the fan is positioned at the outer side of the second combustion chamber body;
the annular pipe is sleeved on the smoke buffer pipe;
the exhaust pipes are at least more than three, one end of each exhaust pipe is connected with the annular pipe, and the other end of each exhaust pipe extends into the smoke buffer pipe;
one end of the air pipe is connected with the air outlet end of the fan, and the other end of the air pipe is connected with the annular pipe.
In the above technical scheme, the rotary kiln is provided with a guiding airflow, which can promote the mixed gas composed of flue gas, auxiliary fuel and air to enter the secondary combustion chamber body from the smoke inlet of the secondary combustion chamber body, the air inlet cover and the inner side wall of the secondary combustion chamber body form a closed environment, so that the mixed gas enters the air inlet cover along the airflow and then enters the flue gas buffer tube from the air inlet, the flue gas buffer tube adopts a wavy structure, which can prolong the mixing time of the mixed gas, furthermore, a mixed air mechanism is arranged, the airflow generated by the fan enters the annular tube through the air pipe and is sprayed into the flue gas buffer tube through the exhaust pipe to flush and mix the mixed gas in the flue gas buffer tube, the exhaust port of the secondary combustion chamber body is provided with a guiding airflow guiding the mixed gas to the exhaust port, so that the mixed gas after uniform mixing is vertically upwards discharged from the air outlet along the flue gas buffer tube, in the process, the aim of prolonging the residence time of the smoke, the auxiliary fuel and the air in the secondary combustion chamber is fulfilled, and the mixed gas is fully combusted in a combustion area of the combustor and finally discharged from a smoke outlet of the secondary combustion chamber body.
Preferably, the smoke buffer tube comprises at least two inclined tubes which are connected in sequence.
Preferably, the smoke buffer tube comprises a first inclined tube, a second inclined tube, a third inclined tube and a fourth inclined tube which are sequentially clamped from top to bottom, the air inlet is located at the bottom of the fourth inclined tube, and the air outlet is located at the top of the first inclined tube.
Preferably, the first inclined tube, the second inclined tube, the third inclined tube and the fourth inclined tube are inclined at an angle of 30-60 ° to the horizontal direction.
Preferably, the outer pipe wall of the exhaust pipe is provided with a limiting disc which protrudes along the diameter direction of one end of the exhaust pipe, the limiting disc is provided with two fixing columns which are parallel to the exhaust pipe, the outer ring pipe wall of the annular pipe is provided with a mounting groove which is communicated with the inside and is used for the exhaust pipe to extend into the inside, the inner ring pipe wall of the annular pipe is provided with an insertion hole which is matched with the exhaust pipe, the mounting groove is provided with a packaging cover, and the inner side of the inner ring pipe wall of the annular pipe is provided with a fixing hole which is matched with the fixing column.
Preferably, the flue gas turbulence device of the second combustion chamber of the rotary kiln further comprises a branch ventilation pipe, one end of the branch ventilation pipe is connected with the part of the air pipe outside the second combustion chamber body, the other end of the branch ventilation pipe is inserted into the fourth inclined pipe and is positioned at the lower port of the fourth inclined pipe, the pipe orifice faces the upper port of the fourth inclined pipe, and the part of the branch ventilation pipe outside the second combustion chamber body is provided with a control valve.
Preferably, the first inclined tube, the second inclined tube, the third inclined tube and the fourth inclined tube are internally provided with smoke dust adsorption nets made of refractory materials.
Preferably, the number of the exhaust pipes is three, and the exhaust pipes are arranged so that the airflow jetted out from the pipe orifices of the exhaust pipes forms a circulating airflow.
To sum up, compare with prior art, the utility model discloses following beneficial effect has: the mixed gas which is composed of the smoke, the auxiliary fuel and the air and enters the secondary combustion chamber body from the smoke inlet of the secondary combustion chamber body is led to the smoke buffer tube through the air inlet cover, the wave-shaped structure of the smoke buffer tube prolongs the mixed gas mixing time, in order to further mix the mixed gas evenly, a mixed air mechanism is arranged, the air flow generated by a fan is finally sprayed into the smoke buffer tube through the exhaust tube, the mixed gas sprayed into the smoke buffer tube is scoured and mixed, the effect of spraying the mixed gas of the air flow by using a single exhaust tube in the actual production process is not as good as that of adopting more than three exhaust tubes, but if the exhaust tubes are directly connected with the air pipes, because the space in the secondary combustion chamber body is limited, the problem of inconvenient operation exists in the actual installation operation process, a ring-shaped tube is arranged to be used as a middle tube for leading the air flow in the air pipe into the exhaust tubes, considering again that the smoke buffer tube is a tubular element, the intermediate tube is arranged in a ring in order to make it easier to install the intermediate tube.
Drawings
Fig. 1 is a schematic structural view of the utility model;
FIG. 2 is a view showing the usage state of the present invention;
FIG. 3 is a schematic view of the connection between the exhaust duct and the ring duct;
FIG. 4 is a schematic view of the installation of the soot absorption screen within the first inclined tube;
fig. 5 is a schematic structural view of a fourth inclined tube.
In the figure: 1. a smoke outlet; 2. a smoke inlet; 3. a slag discharge port; 10. a flue gas buffer tube; 101. an air inlet; 102. an air outlet; 103. an inclined tube; 1031. a first inclined tube; 1032. a second inclined tube; 1033. a third inclined tube; 1034. a fourth inclined tube; 11. an air intake hood; 111. a gas-introducing port; 12. a mixed air mechanism; 121. a fan; 122. an annular tube; 1221. mounting grooves; 1222. an insertion hole; 1223. a package cover; 1224. a fixing hole; 123. an exhaust duct; 124. an air duct; 13. a limiting disc; 14. fixing a column; 15. a vent branch; 16. a control valve; 17. a smoke dust adsorption net.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, 2, 4 and 5, a smoke turbulence device of a second combustion chamber of a rotary kiln comprises a smoke buffer tube 10, an air inlet cover 11 and a mixed air mechanism 12.
The bottom of the air inlet hood 11 is provided with an air inlet 111, the top of the air inlet hood is connected with the air inlet 101 of the smoke buffer tube 10, and the outer edge of the air inlet hood 11 is sealed with the inner side wall of the secondary combustion chamber body.
The number of the mixed air mechanisms 12 is five and is distributed along the length direction of the flue gas buffer tube 10, and the mixed air mechanisms comprise a fan 121, a ring-shaped pipe 122, an exhaust pipe 123 and an air pipe 124. The ring tube 122 is sleeved on the smoke buffer tube 10; the number of the exhaust pipes 123 is more than three, one end of each exhaust pipe is connected with the annular pipe 122, and the other end of each exhaust pipe extends into the smoke buffer pipe 10. One end of the air pipe 124 is connected to the air outlet end of the blower 121, and the other end of the air pipe 124 is connected to the annular pipe 122. The number of the mixed air mechanisms 12 may be other than five of at least two, and the mixed air is more sufficiently mixed as the number of the mixed air mechanisms 12 increases. The number of the exhaust pipes 123 may be other than three, and the mixture gas is more sufficiently mixed as the number of the exhaust pipes 123 increases.
As shown in fig. 4, the gas outlet 102 of the flue gas buffer tube 10 is communicated with the smoke outlet 1 of the second combustion chamber body and the combustion area of the burner, and the flue gas buffer tube 10 is vertically arranged and is wavy and is positioned in the second combustion chamber body; the air inlet 111 of the air inlet cover 11 is communicated with the smoke inlet 2 of the secondary combustion chamber body, the air inlet cover 11 is clamped on the peripheral inner side wall of the secondary combustion chamber body, and the fan 121 is positioned on the left outer wall of the secondary combustion chamber body.
When the rotary kiln is in operation, the rotary kiln is internally provided with guide airflow which can promote mixed gas consisting of smoke, auxiliary fuel and air to enter the secondary combustion chamber body from the smoke inlet 2 of the secondary combustion chamber body, the air inlet hood 11 and the inner side wall of the secondary combustion chamber body form a closed environment, so that the mixed gas enters the air inlet hood 11 along the airflow and then enters the smoke buffer tube 10 from the air inlet 101, the smoke buffer tube 10 adopts a wavy structure and can prolong the mixing time of the mixed gas, the mixed air mechanism 12 is further arranged, the airflow generated by the fan 121 enters the annular tube 122 through the air pipe 124 and is sprayed into the smoke buffer tube 10 through the exhaust pipe 123 to scour and mix the mixed gas in the smoke buffer tube 10, the exhaust port 1 of the secondary combustion chamber body is provided with guide airflow which guides the mixed gas to the exhaust port 1, so that the mixed gas after uniform mixing is vertically upwards exhausted from the air outlet 102 along the smoke buffer tube 10, in the process, the aim of prolonging the retention time of the smoke, the auxiliary fuel and the air in the secondary combustion chamber is fulfilled, and the mixed gas is fully combusted in a combustion area of the combustor and finally discharged from a smoke outlet 1 of the secondary combustion chamber body.
As shown in fig. 1, 4 and 5, the smoke buffer tube 10 adopts a simple and practical structure, which includes a first inclined tube 1031, a second inclined tube 1032, a third inclined tube 1033 and a fourth inclined tube 1034 that are sequentially clamped from top to bottom, the air inlet 101 is located on the bottom of the fourth inclined tube 1034, and the air outlet 102 is located on the top of the first inclined tube 1031, it should be noted that the smoke buffer tube 10 may also be composed of at least two or more inclined tubes 103 that are sequentially connected.
As shown in fig. 1, in order to enable dust particles in flue gas to fall down to the air intake hood 11 along the flue gas buffer tube 10 and finally to the slag discharge port 3 of the second combustion chamber body on the basis of prolonging the mixing time of the mixed gas, the inclination angles of the first inclined tube 1031, the second inclined tube 1032, the third inclined tube 1033 and the fourth inclined tube 1034 to the horizontal direction are all 30 to 60 °.
As shown in fig. 3, in order to facilitate the assembly and disassembly of the exhaust duct 123 and the annular duct 122, the outer wall of the exhaust duct 123 is provided with a limiting disc 13 protruding along the diameter direction of one end of the exhaust duct 123, the limiting disc is provided with two fixing posts 14 parallel to the exhaust duct 123, the outer wall of the annular duct 122 is provided with an installation groove 1221 communicating with the inside and allowing the exhaust duct 123 to extend into the inside, the inner wall of the annular duct 122 is provided with an insertion hole 1222 matching with the exhaust duct 123, the installation groove 1221 is provided with a packaging cover 1223, and the inner side of the inner wall of the annular duct 122 is provided with a fixing hole 1224 matching with the fixing post 14.
As shown in fig. 1, in order to prevent the mixed gas from flowing too slowly in the flue gas buffer tube 10 and affecting the progress of flue gas combustion and discharge, a branch ventilation tube 15 is added, one end of the branch ventilation tube 15 is connected with the part of the air duct 124 outside the second combustion chamber body, the other end of the branch ventilation tube 15 is inserted into the fourth inclined tube 1034 and is located at the lower port of the fourth inclined tube 1034, the nozzle faces the upper port of the fourth inclined tube 1034, a control valve 16 is installed on the part of the branch ventilation tube 15 outside the second combustion chamber body, after the flue gas and the like in the flue gas buffer tube 10 are mixed, the control valve 16 is opened, and the air flow in the branch ventilation tube 15 enters from the lower port of the fourth inclined tube 1034.
As shown in fig. 4, in order to collect the dust in the flue gas, a smoke dust adsorption net 17 made of stainless steel is disposed in each of the first inclined tube 1031, the second inclined tube 1032, the third inclined tube 1033 and the fourth inclined tube 1034.
As shown in fig. 3, in order to mix the mixed gas more sufficiently, the number of the exhaust pipes 123 is three and the exhaust pipes are arranged such that the gas flow ejected from the nozzles forms a circulation gas flow.
The flue gas buffer tube 10, the inlet hood 11 and the part of the mixed air mechanism 12 inside the secondary chamber are made of high temperature resistant materials, such as iron-based, nickel-based and cobalt-based high temperature alloys.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a rotary kiln second combustion chamber flue gas vortex device which characterized by includes:
the smoke buffer tube (10) is provided with an air inlet (101) and an air outlet (102) which is communicated with the smoke outlet of the secondary combustion chamber body and the combustion area of the combustor, is vertically arranged and is wavy and is positioned in the secondary combustion chamber body;
the air inlet cover (11) is provided with an air inlet (111) communicated with the smoke inlet of the secondary combustion chamber body, is connected with the air inlet (101) of the smoke buffer tube (10) and is clamped on the inner side wall of the periphery of the secondary combustion chamber body;
the mixed air mechanisms (12) are distributed along the length direction of the pipe body of the smoke buffer pipe (10) and comprise a fan (121), a ring pipe (122), an exhaust pipe (123) and an air pipe (124);
wherein, the fan (121) is positioned at the outer side of the second combustion chamber body;
the annular tube (122) is sleeved on the smoke buffer tube (10);
the number of the exhaust pipes (123) is more than three, one end of each exhaust pipe is connected with the annular pipe (122), and the other end of each exhaust pipe extends into the smoke buffer pipe (10);
one end of the air pipe (124) is connected with the air outlet end of the fan (121), and the other end of the air pipe (124) is connected with the annular pipe (122).
2. The rotary kiln secondary combustion chamber flue gas turbulence device as claimed in claim 1, characterized in that: the smoke buffer tube (10) comprises at least more than two inclined tubes (103) which are connected in sequence.
3. The rotary kiln secondary combustion chamber flue gas turbulence device as claimed in claim 2, characterized in that: the smoke buffer tube (10) comprises a first inclined tube (1031), a second inclined tube (1032), a third inclined tube (1033) and a fourth inclined tube (1034) which are sequentially clamped from top to bottom, the air inlet (101) is located on the bottom of the fourth inclined tube (1034), and the air outlet (102) is located on the top of the first inclined tube (1031).
4. The rotary kiln secondary combustion chamber flue gas turbulence device as claimed in claim 3, characterized in that: the inclination angles of the first inclined pipe (1031), the second inclined pipe (1032), the third inclined pipe (1033) and the fourth inclined pipe (1034) in the horizontal direction are all 30-60 degrees.
5. The rotary kiln secondary combustion chamber flue gas turbulence device as claimed in claim 4, characterized in that: the exhaust pipe structure is characterized in that a limiting disc (13) protruding along the diameter direction of one end of the exhaust pipe (123) is arranged on the outer pipe wall of the exhaust pipe (123), two fixing columns (14) parallel to the exhaust pipe (123) are arranged on the limiting disc (13), an installation groove (1221) communicated with the inside and used for the exhaust pipe (123) to extend into the inside is formed in the outer pipe wall of the annular pipe (122), an insertion hole (1222) matched with the exhaust pipe (123) is formed in the inner pipe wall of the annular pipe (122), a packaging cover (1223) is installed on the installation groove (1221), and fixing holes (1224) matched with the fixing columns (14) are formed in the inner side of the inner pipe wall of the annular pipe (122).
6. The rotary kiln secondary combustion chamber flue gas turbulence device as claimed in claim 5, characterized in that: the rotary kiln secondary combustion chamber flue gas turbulence device further comprises a branch ventilation pipe (15), one end of the branch ventilation pipe (15) is connected with the part of the air pipe (124) on the outer side of the secondary combustion chamber body, the other end of the branch ventilation pipe (15) is inserted into the fourth inclined pipe (1034) and is located at the lower port of the fourth inclined pipe (1034), the pipe orifice faces the upper port of the fourth inclined pipe (1034), and a control valve (16) is installed on the part of the branch ventilation pipe (15) on the outer side of the secondary combustion chamber body.
7. The rotary kiln secondary combustion chamber flue gas turbulence device as claimed in claim 6, characterized in that: smoke dust adsorption nets (17) made of refractory materials are arranged in the first inclined tube (1031), the second inclined tube (1032), the third inclined tube (1033) and the fourth inclined tube (1034).
8. The rotary kiln secondary combustion chamber flue gas turbulence device as claimed in claim 7, characterized in that: the number of the exhaust pipes (123) is three, and the exhaust pipes are arranged to form circulating airflow by airflow ejected from pipe orifices of the exhaust pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021831311.XU CN213746751U (en) | 2021-04-02 | 2021-04-02 | Smoke turbulence device for secondary combustion chamber of rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021831311.XU CN213746751U (en) | 2021-04-02 | 2021-04-02 | Smoke turbulence device for secondary combustion chamber of rotary kiln |
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| Publication Number | Publication Date |
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| CN213746751U true CN213746751U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021831311.XU Active CN213746751U (en) | 2021-04-02 | 2021-04-02 | Smoke turbulence device for secondary combustion chamber of rotary kiln |
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| CN (1) | CN213746751U (en) |
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2021
- 2021-04-02 CN CN202021831311.XU patent/CN213746751U/en active Active
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