Denitration flue and denitration flue implantable heating device

Abstract

The utility model discloses a denitration flue and an implantable heating device for the denitration flue. The implantable heating device comprises a gas pipeline, a combustion-supporting air pipe and a spray head, the gas pipeline comprises a first gas pipeline and a second gas pipeline; the combustion-supporting air pipe comprises a first combustion-supporting air pipe and a second combustion-supporting air pipe, the first gas pipeline and the second combustion-supporting air pipe are vertically arranged in the flue body, and the first end of the first gas pipeline and the first end of the second gas pipeline are communicated to the spray head in parallel; a jet orifice of the nozzle is the same as the flow direction of flue gas in the flue body; the second gas pipeline and the second combustion-supporting air pipe penetrate out of the side wall of the flue body. Compared with the structures of the external hot blast stove and the induced draft fan in the prior art, not only is the installation space saved, but also the cost is greatly reduced. Besides, as the flame gun head, namely the spray head, of the heating device is arranged in the flue, unheated smoke plays a role in cooling the spray head, and the service life of the heating device is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of glass kiln smoke emission, in particular to a denitrification flue and a denitrification flue embedded heating device. Background Art

[0002] The requirements for flue gas emissions from glass kilns are becoming increasingly stringent, and the corresponding desulfurization and denitrification process technologies are constantly improving. SCR denitrification technology is the selective catalytic reduction technology. The optimal reaction temperature of the catalyst is 320-350℃, which can effectively reduce NO X Reduced to N2 and H2O. When the flue gas temperature is lower than 320℃, the flue gas temperature needs to be heated to the optimal catalytic temperature before denitration. The traditional way to heat the flue gas is to lead the flue gas out of the flue, then introduce it into the hot air furnace for heating, and then discharge it into the flue for mixing to increase the temperature. This method requires the use of an external hot air furnace, which occupies a large space and has a high manufacturing cost. It also requires flue induced draft, and two additional induced draft fans are added, one for backup and the other for use.

[0003] The patent application with application number 201920063101.1 discloses a direct-fired temperature-rise heating device for a denitrification system, which includes flame-stabilizing tubes symmetrically arranged on both sides of the denitrification flue, each flame-stabilizing tube is fixedly supported on the mounting platform by a flame-stabilizing bracket below, and extends obliquely upward into the denitrification flue, so that the flue gas entering the internal mixing layer of the denitrification flue is directly mixed with the high-temperature gas entering from both sides, thereby ensuring uniform and complete mixing. At the same time, the high-temperature gas and the flue gas inside the denitrification flue are directly mixed and heat exchanged in the mixing layer. However, in this technical solution, after the high-temperature flue gas after the combustion of the fuel gas is mixed with the original flue gas in the flue, the total amount of flue gas in the flue will increase sharply, which will have a great impact on the flue system, and the counter-arranged air intake method will also cause turbulence of the flue gas in the flue, which will have an adverse effect on the flue gas emission.

[0004] Based on this, the existing technology still needs to be improved. Utility Model Content

[0005] In order to solve the above technical problems, the embodiments of the present utility model propose a denitrification flue and a denitrification flue embedded heating device to solve the problems existing in the flue gas heating in the denitrification flue of the prior art flue gas denitrification flue.

[0006] In order to solve the above technical problems, on the one hand, some embodiments of the utility model disclose a denitrification flue implantable heating device, including a gas pipeline, a combustion-supporting air duct and a nozzle;

[0007] The gas pipeline includes a first gas pipeline and a second gas pipeline; the combustion-supporting air duct includes a first combustion-supporting air duct and a second combustion-supporting air duct, wherein the first gas pipeline and the first combustion-supporting air duct are vertically arranged in the flue body, and the first end of the first gas pipeline and the first end of the second gas pipeline are connected to the nozzle in parallel;

[0008] The nozzle outlet has the same direction as the flue gas flow in the flue body;

[0009] The second gas pipeline is connected to the second end of the first gas pipeline and passes through the side wall of the flue body;

[0010] The second combustion-supporting air duct is connected to the second end of the first combustion-supporting air duct and passes through the side wall of the flue body.

[0011] In some embodiments, a portion of the second combustion-supporting air duct located outside the flue body is connected to a combustion-supporting air fan.

[0012] In some embodiments, the first end of the first gas pipeline is the upper end, the first end of the first combustion-supporting air duct is the upper end, and the injection port of the nozzle is arranged upward.

[0013] In some embodiments, an igniter is further included, which penetrates the side wall of the flue body and has a front end facing the injection port of the nozzle.

[0014] In some embodiments, the gas pipeline is mounted inside the combustion-supporting air duct, and the gas pipeline and the combustion-supporting air duct are concentrically arranged.

[0015] In some embodiments, the second gas pipeline and the second combustion-supporting air pipe are vertically inserted into the flue body.

[0016] In some embodiments, the center line of the gas pipeline coincides with the center line of the flue body.

[0017] In some embodiments, a flame detector is further included. The flame detector is arranged on the inner wall of the flue body and close to the injection port of the nozzle.

[0018] In some embodiments, a gas control valve is further included, and the gas control valve is disposed on the second gas pipeline.

[0019] On the other hand, some embodiments of the utility model also disclose a denitrification flue, which includes a flue body and the aforementioned denitrification flue implantable heating device; wherein the flue body is arranged vertically, and a mounting hole is opened on the side wall, and a fixing mechanism is arranged on the outer side of the mounting hole; the second gas pipeline and the second combustion-supporting air duct pass vertically through the mounting hole and are fixed by the fixing mechanism.

[0020] By adopting the above technical solution, the utility model has at least the following beneficial effects:

[0021] The utility model provides a flue gas denitrification flue and an implantable heating device for the denitrification flue. By setting an implantable nozzle, a flame is directly ejected in the flue body of the denitrification flue. At the same time, the nozzle nozzle is set to be the same as the flue gas flow direction in the denitrification flue, thereby avoiding the flame from being affected by the flue gas flow velocity. The flame is well filled in the flue, the flame is stable, and the flue gas is heated more evenly. Compared with the structure of the external hot blast furnace and induced draft fan in the prior art, it saves installation space and greatly reduces costs. In addition, since the flame gun head of the heating device, i.e., the nozzle, is arranged in the flue, the unheated flue gas cools the nozzle, effectively increasing the service life of the heating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a denitrification flue and a denitrification flue embedded heating device disclosed in some embodiments of the utility model.

[0024] Description of reference numerals:

[0025] 100. Denitrification flue; 200. Denitrification flue implantable heating device;

[0026] 1. Gas pipeline; 2. Combustion-supporting air duct; 3. Combustion-supporting fan; 4. Ignitor; 5. Flue body; 6. Nozzle; 7. Flame; 8. Flue gas flow direction; 11. First gas pipeline; 12. Second gas pipeline; 21. First combustion-supporting air duct; 22. Second combustion-supporting air duct. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0028] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0029] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0031] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0032] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0034] like Figure 1As shown, some embodiments of the utility model disclose a denitrification flue implantable heating device 200, which can be directly applied to the denitrification flue 100 of the flue gas emission of the glass kiln, specifically, it can include a gas pipeline 1, a combustion-supporting air duct 2 and a nozzle 6; wherein the gas pipeline 1 provides combustible gas, the combustion-supporting air duct 2 provides combustion-supporting gas, the nozzle 6 is used to mix the combustible gas and the combustion-supporting gas and ignite them, the gas pipeline 1 can include a first gas pipeline 11 and a second gas pipeline 12, the first gas pipeline 11 and the second gas pipeline 12 can be a connected integrated pipeline, or can be two pipelines connected by a joint; the combustion-supporting air duct 2 includes a first combustion-supporting air duct 21 and a second combustion-supporting air duct 22. The combustion air duct 22, similarly, the first combustion-supporting air duct 21 and the second combustion-supporting air duct 22 can be a connected integrated pipe, or can be two pipes connected by a joint, wherein the first gas pipeline 11 and the first combustion-supporting air duct 21 are vertically arranged in the flue body 5, and the first end of the first gas pipeline 11 and the first end of the second gas pipeline 12 are connected to the nozzle 6 in parallel; the injection port of the nozzle 6 has the same direction of flue gas flow in the flue body 5; the second gas pipeline 12 is connected to the second end of the first gas pipeline 11, and passes through the side wall of the flue body 5; the second combustion-supporting air duct 22 is connected to the second end of the first combustion-supporting air duct 21, and passes through the side wall of the flue body 5.

[0035] When in use, the combustible gas and the combustion-supporting gas are provided by the gas pipeline 1 and the combustion-supporting air duct 2 respectively, and are mixed and ignited at the nozzle 6 to form a flame 7. The direction of the flame is consistent with the direction of the flue gas flow 8 in the flue body 5, which avoids the flame 7 being affected by the flue gas flow rate. In addition, the flame 7 is well filled in the flue body 5, the flame is stable, and the flue gas is heated more evenly. The external hot air furnace and induced draft fan of the prior art are optimized, which not only saves installation space but also greatly reduces costs. The nozzle 6 is arranged in the flue body 5, and the unheated flue gas plays the role of the nozzle 6, which increases the service life of the heating device.

[0036] In this embodiment, the gas pipeline 1 and the combustion-supporting air duct 2 can be two pipelines arranged in parallel, or can be formed by a pipeline with two fluid channels. In some embodiments, the gas pipeline 1 is sleeved in the combustion-supporting air duct 2, and the gas pipeline 1 and the combustion-supporting air duct 2 are arranged concentrically. The arrangement of the gas pipeline 1 in the sleeve is safer. In addition, the concentrically sleeved flue gas pipeline and the combustion-supporting air duct 2 have a larger contact area between the combustion-supporting gas and the combustible gas at the outlet, which is more conducive to the full combustion of the combustible gas and improves the combustion efficiency of the combustible gas.

[0037] The denitrification flue implantable heating device 200 disclosed in some embodiments of the utility model, on the basis of the above embodiments, in order to ensure sufficient supply of combustion-supporting gas and sufficient combustion, the part of the second combustion-supporting air duct 22 located outside the flue body 5 is connected and provided with a combustion-supporting fan 3. The combustion-supporting gas of the required flow rate is provided by the combustion-supporting fan 3. In actual production, a gas control valve should also be provided on the second gas pipeline 12 so that the flow rate of the combustion-supporting gas can be matched with the flow direction of the combustible gas, that is, matching adjustment parameters are pre-set and adjusted according to the instantaneous temperature in the flue body 5. Ensure that the flue gas temperature in the flue is maintained within a reasonable range. In addition, in order to realize the ignition operation of the nozzle 6 and timely monitor the flame state at the nozzle 6, the present embodiment also includes an igniter 4 and a flame detector. The igniter 4 runs through the side wall of the flue body 5, and the front end is directly facing the injection port of the nozzle 6. It also includes a flame detector, which is arranged on the inner wall of the flue body 5 and close to the injection port of the nozzle 6. The specific structure of the igniter 4 and the specific structure of the flame detector can adopt commonly used products in the prior art, and will not be described in detail here.

[0038] The denitrification flue implantable heating device 200 disclosed in some embodiments of the utility model is based on the above embodiments, the first end of the first gas pipeline 11 is the upper end, the first end of the first combustion-supporting air duct 21 is the upper end, and the injection port of the nozzle 6 is set upward. The flue gas in the flue body 5 flows from bottom to top. The second gas pipeline 12 and the second combustion-supporting air duct 22 are vertically inserted into the flue body 5, that is, the second gas pipeline 12 and the second combustion-supporting air duct 22 are perpendicular to each other with the flue body 5, the first gas pipeline 11 and the second gas pipeline 12 are perpendicular, and the two can be connected by a right-angle joint, the first combustion-supporting air duct 21 and the second combustion-supporting air duct 22 are perpendicular, and the two can be connected by a right-angle joint. Generally, the first gas pipeline 11 and the first combustion-supporting air duct 21 should be arranged at the center of the flue body 5, and be adapted to connect the nozzle 6 at the center. After ignition, the nozzle 6 can spray a vertically upward flame, which flows in the same direction as the vertically upward flue gas, and continuously heats the flue gas during the flow.

[0039] Some embodiments of the utility model disclose a denitrification flue, such as Figure 1As shown, it includes a flue body 5 and a denitrification flue implantable heating device 200; the flue body 5 is arranged vertically, and a mounting hole is opened on the side wall, and a fixing mechanism is arranged outside the mounting hole; the second gas pipeline 12 and the second combustion-supporting air duct 22 pass through the mounting hole vertically and are fixed by the fixing mechanism. Specifically, the denitrification flue implantable heating device 200 includes a gas pipeline 1, a combustion-supporting air duct 2 and a nozzle 6; the gas pipeline 1 is integrated with the combustion-supporting air duct 2, and the gas pipeline 1 is concentrically arranged inside the combustion-supporting air duct 2. The first part (i.e., the first gas pipeline 11 and the first combustion-supporting air duct 21) is vertically located in the flue body 5, and the center line of the gas pipeline 1 coincides with the center line of the flue body 5, and the outlet faces upward, and the nozzle 6 is connected at the outlet, and the flame is ejected upward after being ignited by the igniter 4; the second part (i.e., the second gas pipeline 12 and the second combustion-supporting air duct 22) is perpendicular to the first part, extending from the mounting hole of the side wall of the flue body 5, and connecting the combustion-supporting gas source and the gas source respectively. At the mounting hole, the connection and fixation can be performed by a flange or other fixing mechanism. This connection method to the pipeline can adopt the commonly used connection means in the art. Those skilled in the art should know this and will not be elaborated here.

[0040] In this embodiment, the flue gas in the flue body 5 is transported from bottom to top, and the injection port of the nozzle 6 has the same flow direction as the flue gas in the flue body 5. When the flue gas needs to be heated, the gas in the gas pipeline 1 and the combustion-supporting fan 3 are opened in a certain proportion, and the combustion-supporting wind provides the necessary oxygen for the combustion of the gas. The combustion-supporting wind passes through the combustion-supporting air duct 2, and the gas passes through the gas pipeline 1 and reaches the flame nozzle 6 at the same time. At this time, the igniter 4 is started to ignite the gas and heat the flue gas in the flue. The temperature of the nozzle 6 rises, but the unheated flue gas plays a role in cooling the nozzle 6, thereby increasing the service life of the heating device. The igniter 4 can be designed to be retractable to adapt to flue bodies 5 of different diameters. When igniting, it extends into the middle position of the nozzle 6, which is conducive to the ignition of the gas. After ignition, it retracts outside the nozzle 6 to prevent the igniter 4 from being damaged by continuous high temperature.

[0041] In summary, the denitrification flue and the denitrification flue implantable heating device disclosed by the utility model have flame nozzles directly arranged in the flue, which optimizes the hot air furnace and induced draft fan of the traditional heating device, saves installation space and reduces costs, has stable flames, and evenly heats the flue gas, thereby increasing the service life of the heating device. The direction of the flame is consistent with the direction of the flue gas flow, which avoids the fluctuation of the flame due to the flue gas flow rate and improves the reliability of the equipment operation. The combustion-supporting wind can be adjusted proportionally according to the gas flow rate. This not only improves the reliability and safety of the equipment operation, but also greatly saves installation space and reduces manufacturing costs.

[0042] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0043] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A denitrification flue embedded heating device, characterized in that: It comprises a gas pipeline (1), a combustion-supporting air duct (2) and a nozzle (6); The gas pipeline (1) comprises a first gas pipeline (11) and a second gas pipeline (12); the combustion-supporting air duct (2) comprises a first combustion-supporting air duct (21) and a second combustion-supporting air duct (22); the first gas pipeline (11) and the first combustion-supporting air duct (21) are vertically arranged in a denitrification flue, and the first end of the first gas pipeline (11) and the first end of the second gas pipeline (12) are connected in parallel to the nozzle (6); The injection port of the nozzle (6) is in the same direction as the flue gas flow direction (8) in the flue body (5) of the denitrification flue; The second gas pipeline (12) is connected to the second end of the first gas pipeline (11) and passes through the side wall of the flue body (5); The second combustion-supporting air duct (22) is connected to the second end of the first combustion-supporting air duct (21) and passes through the side wall of the flue body (5).

2. The denitrification flue embedded heating device according to claim 1, characterized in that: The portion of the second combustion-supporting air pipe (22) located outside the flue body (5) is connected to a combustion-supporting air fan (3).

3. The denitrification flue embedded heating device according to claim 1, characterized in that: The first end of the first gas pipeline (11) is the upper end, the first end of the first combustion-supporting air pipe (21) is the upper end, and the injection port of the nozzle (6) is arranged to face upward.

4. The denitrification flue embedded heating device according to claim 1, characterized in that: It also includes an igniter (4), which passes through the side wall of the flue body (5) and has a front end facing the injection port of the nozzle (6).

5. The denitrification flue embedded heating device according to claim 1, characterized in that: The gas pipeline (1) is sleeved inside the combustion-supporting air duct (2), and the gas pipeline (1) and the combustion-supporting air duct (2) are arranged concentrically.

6. The denitrification flue embedded heating device according to claim 1, characterized in that: The second gas pipeline (12) and the second combustion-supporting air pipe (22) are vertically inserted into the flue body (5).

7. The denitrification flue embedded heating device according to claim 5, characterized in that: The center line of the gas pipeline (1) coincides with the center line of the flue body (5).

8. The denitrification flue embedded heating device according to claim 1, characterized in that: It also comprises a flame detector, which is arranged on the inner wall of the flue body (5) and close to the injection port of the nozzle (6).

9. The denitrification flue embedded heating device according to claim 1, characterized in that: It also comprises a gas control valve, which is arranged on the second gas pipeline (12).

10. A denitrification flue, characterized in that: It comprises a flue body (5), and the denitrification flue embedded heating device according to any one of claims 1 to 9; The flue body (5) is arranged vertically, and a mounting hole is opened on the side wall, and a fixing mechanism is arranged outside the mounting hole; The second gas pipeline (12) and the second combustion-supporting air pipe (22) pass vertically through the mounting hole and are fixed by the fixing mechanism.

Images