CN117515554A - Smoldering furnace and smoldering furnace operation method - Google Patents

Abstract

The invention relates to the technical field of solid waste disposal, and discloses a smoldering furnace and a smoldering furnace operation method, wherein the smoldering furnace comprises a furnace body and a preheating unit, and the furnace body comprises a feed inlet; the preheating unit comprises a fuel storage tank, a burner and a heating component, wherein the fuel storage tank is used for storing fuel, the burner is connected with the fuel storage tank, the burner is used for burning the fuel to produce high-temperature gas, the heating component is arranged in the furnace body and is provided with an inner cavity, the inner cavity is connected with the burner to be filled with the high-temperature gas, and the outer part of the heating component can be contacted with materials to achieve the purpose of preheating the materials by the high-temperature gas. In the smoldering furnace provided by the embodiment of the invention, the combustor can burn fuel to generate high-temperature flue gas, and the high-temperature flue gas is introduced into the inner cavity of the heating component to rapidly preheat materials in the furnace body. When the smoldering reaction temperature is insufficient, the preheating unit can be started again to preheat the materials in the furnace body for the second time. The preheating unit has better applicability to the water content of the materials.

Description

Smoldering furnace and smoldering furnace operation method

Technical Field

The invention relates to the technical field of solid waste disposal, in particular to a smoldering furnace and a smoldering furnace operation method.

Background

The smoldering treatment technology is a solid waste heat treatment technology which is widely paid attention to at present, and compared with the common solid waste treatment technology, the smoldering treatment technology can treat solid waste with higher heat value, such as oily sludge, household garbage, municipal sludge and the like, and has the advantages of low treatment energy consumption, wide application range, safety, high efficiency, flexible treatment, modularized design and the like.

The smoldering furnace needs to preheat the material in the furnace when running, and the electric heating device is generally adopted to preheat the material in the related technology, and the preheating mode has the problems that the preheating time is long, secondary heating cannot be carried out in the smoldering running process, and the electric heating device is easy to generate short circuit when the water content of the material is high.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the invention provides the smoldering furnace, which preheats materials through high-temperature gas generated by fuel combustion, has shorter preheating time and can be ignited and preheated for the second time when the smoldering reaction temperature is insufficient.

The smoldering furnace comprises a furnace body and a preheating unit, wherein the furnace body comprises a feed inlet, the feed inlet is used for adding materials into the furnace body, and the interior of the furnace body is used for smoldering the materials; the preheating unit comprises a fuel storage tank, a combustor and a heating component, wherein the fuel storage tank is used for storing fuel, the combustor is connected with the fuel storage tank, the combustor is used for combusting the fuel to produce high-temperature gas, the heating component is arranged in the furnace body, the heating component is provided with an inner cavity, the inner cavity is connected with the combustor to supply the high-temperature gas, and the outer part of the heating component can be contacted with the material to realize that the high-temperature gas preheats the material.

In the smoldering furnace provided by the embodiment of the invention, the combustor can burn fuel to generate high-temperature flue gas, and the high-temperature flue gas is introduced into the inner cavity of the heating component to rapidly preheat materials in the furnace body. When the smoldering reaction temperature is insufficient, the preheating unit can be started again to preheat the materials in the furnace body for the second time. The preheating unit has better applicability to the water content of the materials.

In some embodiments, the preheating unit includes a fume exhaust pipe in communication with the heating assembly and configured to exhaust gas within the heating assembly.

In some embodiments, the heating assembly comprises a plurality of heating tubes, a plurality of the heating tubes are crisscrossed, and the heating tubes are connected between the burner and the smoke exhaust tube.

In some embodiments, the smoldering furnace comprises a wind distribution unit, at least part of the wind distribution unit is positioned in the furnace body and arranged at the lower side of the heating component, and the wind distribution unit is used for supplying wind to the interior of the furnace body so as to smoldering the materials.

In some embodiments, the air distribution unit includes a blower, an air supply pipe, and an air nozzle, the air nozzle being located inside the furnace body and disposed at a lower side of the heating assembly, the air supply pipe being connected between the air nozzle and the blower.

In some embodiments, the smoldering furnace comprises a slag discharging unit positioned at the lower side of the tuyere, and the slag discharging unit is used for discharging ash slag in the furnace body.

In some embodiments, the smoldering burner includes a flame arrestor disposed between the fuel tank and the burner, and the flame arrestor is used to prevent flashback.

In some embodiments, the furnace body includes a smoke vent disposed at a top of the furnace body, and the smoke vent is used to discharge smoke generated by smoldering.

In some embodiments, the smoldering furnace includes a temperature sensor disposed inside the furnace body, and the temperature sensor is configured to detect a temperature of the material.

The embodiment of the invention also provides a smoldering furnace operation method.

The operation method of the smoldering furnace provided by the embodiment of the invention comprises the following steps:

step one: adding materials into the furnace body;

step two: igniting the burner and detecting the temperature of the material in the furnace body;

step three: when the temperature of the materials is detected to reach the set temperature, the burner is closed and air supply to the inside of the furnace body is started to realize smoldering ignition;

step four: continuously adding materials into the furnace body and discharging ash slag in the furnace body.

Drawings

Fig. 1 is a schematic structural view of a smoldering furnace according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a heating assembly of a smoldering furnace according to an embodiment of the present invention.

Reference numerals:

1. a furnace body; 11. a feed inlet; 21. a smoke outlet; 2. a preheating unit; 21. a fuel storage tank; 22. a burner; 23. a heating assembly; 231. heating pipes; 24. a smoke exhaust pipe; 3. an air distribution unit; 31. a blower; 32. an air supply pipeline; 4. a slag discharging unit; 5. and a flame arrester.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1 and 2, the smoldering furnace according to the embodiment of the invention comprises a furnace body 1 and a preheating unit 2, wherein the furnace body 1 comprises a feed inlet 11, the feed inlet 11 is used for adding materials into the furnace body 1, and the interior of the furnace body 1 is used for smoldering the materials. Specifically, a feed inlet 11 is formed in the top of the furnace body 1, and materials are fed into the furnace body 1 through the feed inlet 11.

The preheating unit 2 comprises a fuel storage tank 21, a burner 22 and a heating component 23, wherein the fuel storage tank 21 is used for storing fuel, the burner 22 is connected with the fuel storage tank 21, the burner 22 is used for burning the fuel to produce high-temperature gas, the heating component 23 is arranged in the furnace body 1, the heating component 23 is provided with an inner cavity, the inner cavity is connected with the burner 22 to be filled with the high-temperature gas, and the outer part of the heating component 23 can be contacted with the material to realize the preheating of the material by the high-temperature gas.

Alternatively, the fuel stored in the fuel tank 21 is natural gas.

In the smoldering furnace provided by the embodiment of the invention, the combustor 22 can burn fuel to generate high-temperature smoke, and the high-temperature smoke is introduced into the inner cavity of the heating component 23 to rapidly preheat materials in the furnace body 1. When the smoldering reaction temperature is insufficient, the preheating unit 2 can be started again to preheat the materials in the furnace body 1 for the second time. The preheating unit 2 has better applicability to the water content of the materials.

In some embodiments, as shown in fig. 1 and 2, the preheating unit 2 includes a smoke exhaust pipe 24, the smoke exhaust pipe 24 communicates with the heating assembly 23, and the smoke exhaust pipe 24 is used to exhaust gas in the heating assembly 23. The high temperature flue gas generated by the burner 22 enters the interior of the heating assembly 23 and then exchanges heat with the material to effect preheating of the material, and the temperature of the flue gas is then reduced and discharged from the flue gas discharge tube 24.

In some embodiments, as shown in fig. 1 and 2, the heating assembly 23 includes a plurality of heating pipes 231, the plurality of heating pipes 231 are disposed in a crisscross arrangement, and the heating pipes 231 are connected between the burner 22 and the smoke exhaust pipe 24. The heating pipes 231 can increase the heat exchange area of the high-temperature flue gas and the materials, and the preheating speed and the preheating effect of the materials are improved.

In some embodiments, as shown in fig. 1 and 2, the smoldering furnace comprises a wind distribution unit 3, at least part of the wind distribution unit 3 is located inside the furnace body 1 and is arranged at the lower side of the heating assembly 23, and the wind distribution unit 3 is used for supplying wind to the inside of the furnace body 1 so as to smoldering materials. The air distribution unit 3 is used for providing a proper amount of air for the materials so as to realize smoldering of the materials. Specifically, when the preheating of the bottom materials in the furnace body 1 reaches 300 ℃, the preheating unit 2 is closed, and then the air distribution unit 3 is opened, so that smoldering ignition of the materials in the furnace body 1 can be realized.

In some embodiments, the air distribution unit 3 includes a blower 31, an air supply line 32, and an air nozzle, the air nozzle being located inside the furnace body 1 and being disposed at the lower side of the heating assembly 23, the air supply line 32 being connected between the air nozzle and the blower 31.

In some embodiments, as shown in fig. 1 and 2, the smoldering furnace includes a slag discharging unit 4, the slag discharging unit 4 is located at the lower side of the tuyere, and the slag discharging unit 4 is used for discharging ash slag inside the furnace body 1.

In some embodiments, as shown in fig. 1, 2, the smoldering furnace includes a flame arrestor 5, the flame arrestor 5 being disposed between the fuel storage tank 21 and the burner 22, and the flame arrestor 5 being used to prevent flashback.

In some embodiments, as shown in fig. 1 and 2, the furnace body 1 includes a smoke outlet 21, the smoke outlet 21 is disposed at the top of the furnace body 1, and the smoke outlet 21 is used for discharging smoke generated by smoldering. The smoke generated by smoldering the material is discharged through the smoke outlet 21.

In some embodiments, as shown in fig. 1 and 2, the smoldering furnace includes a temperature sensor, the temperature sensor is disposed inside the furnace body 1, and the temperature sensor is used for detecting the temperature of the material. Specifically, the temperature sensor monitors the temperature of the material to judge whether the preheating reaches the set temperature, and after the preheating reaches the set temperature, the preheating is stopped and the air is introduced for smoldering ignition.

The following describes the operation method of the smoldering furnace according to the embodiment of the present invention.

The smoldering furnace operation method of the embodiment of the invention is based on the smoldering furnace in the embodiment, and comprises the following steps:

step one: material is added to the interior of the furnace body 1.

Step two: the burner 22 is ignited and the temperature of the material in the furnace body 1 is detected. The burner 22 generates high temperature flue gas after ignition, and the high temperature flue gas enters the inner cavity of the heating component 23 to preheat materials.

Step three: when the temperature of the material is detected to reach the set temperature, the burner 22 is turned off and the supply of air to the inside of the furnace body 1 is started to achieve the smoldering point.

Step four: continuously adding materials into the furnace body 1 and discharging ash slag in the furnace body 1.

In other embodiments, when the smoldering firing temperature is insufficient, the preheating unit 2 may be activated again to secondarily heat the material until the smoldering firing temperature is reached.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. A smoldering furnace, comprising:

the furnace body comprises a feed inlet, wherein the feed inlet is used for adding materials into the furnace body, and the furnace body is internally used for smoldering the materials;

a preheating unit including a fuel tank, a burner, and a heating assembly,

the fuel storage tank is used for storing fuel,

the burner is connected with the fuel storage tank and is used for burning the fuel to produce high-temperature gas,

the heating assembly is arranged in the furnace body, the heating assembly is provided with an inner cavity, the inner cavity is connected with the burner so as to be supplied with high-temperature gas, and the outer part of the heating assembly can be in contact with the material so as to realize that the high-temperature gas preheats the material.

2. The smoldering furnace of claim 1, wherein said preheating unit comprises a fume exhaust tube in communication with said heating assembly and for exhausting gas within said heating assembly.

3. The smoldering furnace of claim 2, wherein said heating assembly comprises a plurality of heating tubes, a plurality of said heating tubes being crisscrossed, and wherein said heating tubes are connected between said burner and said smoke evacuation tube.

4. The smoldering furnace of claim 1, comprising a wind distribution unit, at least a portion of the wind distribution unit being located inside the furnace body and disposed below the heating assembly, the wind distribution unit being configured to supply wind to the inside of the furnace body to smoldering the material.

5. The smoldering furnace of claim 4, wherein said air distribution unit comprises a blower, an air supply line and an air nozzle, said air nozzle being located inside said furnace body and disposed on the underside of said heating assembly, said air supply line being connected between said air nozzle and said blower.

6. The smoldering furnace of claim 5, comprising a slag discharging unit located at a lower side of the tuyere for discharging ash in the furnace body.

7. The smoldering furnace of claim 1, comprising a flame arrestor disposed between the fuel tank and the burner, and the flame arrestor is configured to prevent flashback.

8. The smoldering furnace of claim 1, wherein the furnace body comprises a smoke vent disposed at a top of the furnace body, and the smoke vent is for discharging smoke generated by smoldering.

9. The smoldering furnace of claim 1, comprising a temperature sensor disposed inside the furnace body, and the temperature sensor is configured to detect a temperature of the material.

10. A smoldering furnace operating method based on the smoldering furnace as claimed in any one of claims 1 to 9, characterized by comprising the steps of:

step one: adding materials into the furnace body;

step two: igniting the burner and detecting the temperature of the material in the furnace body;

step three: when the temperature of the materials is detected to reach the set temperature, the burner is closed and air supply to the inside of the furnace body is started to realize smoldering ignition;

step four: continuously adding materials into the furnace body and discharging ash slag in the furnace body.