Intensive SCR (Selective Catalytic Reduction) denitration reactor

Abstract

The utility model relates to the technical field of flue gas denitration treatment, in particular to an intensive SCR (Selective Catalytic Reduction) denitration reactor. The intensive SCR denitration reactor comprises a denitration reactor body and a denitration flue, the denitration flue is vertically arranged and detachably mounted on one side of the denitration reactor body in an attached mode, the upper end of the denitration flue is connected and communicated with a flue gas inlet in the top of the denitration reactor body, and the lower end of the denitration flue is connected and communicated with a flue gas outlet in the top of the denitration reactor body. A smoke inlet section is arranged at the lower end of the denitration flue in a bending manner. The device has the advantages that the structural design is simple and reasonable, the traditional denitration flue and the reactor are arranged on the same wall, the occupied area and space of the whole arrangement are effectively reduced, and the use arrangement of a steel structure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas denitration treatment, in particular to an intensive SCR denitration reactor. Background Art

[0002] Flue gas SCR denitrification is an important flue gas purification and treatment equipment at the boiler outlet. SCR denitrification can remove NOX in flue gas, reduce pollutant emissions, prevent the formation of acid rain, and play an important role in the quality of the social atmospheric environment. The main equipment of SCR denitrification is the layout of the denitrification flue and denitrification reactor. According to the size of different boilers, the sizes of the denitrification flue and reactor are generally different. Taking the common 480t / h boiler as an example, the denitrification flue is generally about 11x2m in size, and the cross-section of the denitrification reactor is generally about 11x6m. The denitrification flue and reactor take into account the flue gas measurement points, such as temperature, pressure, flow, NOX, O2 and other measuring instruments and The delivery pipelines for denitrification reducing agents, etc., also need to be set up with sufficient installation space and access platforms. Under normal circumstances, the width of the denitrification flue and reactor is more than 10m, but some boilers were built earlier when the country's environmental protection emission indicators were low. The space for the later construction of SCR denitrification equipment was not considered during the construction of the boiler. With the improvement of national environmental protection indicators, SCR denitrification equipment needs to be installed before the boiler flue gas is discharged. The site has become a problem that must be faced. In the case of insufficient site, the equipment at the rear of the flue, such as the dust collector, can only be removed to place the denitrification flue and reactor with a width of about 10m, which has caused a huge waste of the owner's renovation costs.

[0003] Based on this, it is necessary to develop a more compact and intensive SCR denitrification reactor and an integrated layout structure of the denitrification flue to overcome the above-mentioned problem of insufficient installation space. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an intensive SCR denitration reactor, which effectively overcomes the defects of the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] An intensive SCR denitrification reactor comprises a denitrification reactor body and a denitrification flue. The denitrification flue is arranged vertically and can be detachably mounted on one side of the denitrification reactor body. The upper end of the denitrification flue is connected and communicated with the flue gas inlet at the top of the denitrification reactor body. The lower end of the denitrification flue is bent and provided with a smoke inlet section.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a plurality of groups of slots are provided at intervals up and down on one side of the denitrification reactor body, each group of the slots is provided with two slots, and are distributed horizontally at intervals. Insert plates corresponding to the slots are fixed on both sides of the denitrification flue, and the insert plates are inserted into the corresponding slots from top to bottom.

[0009] Furthermore, a support plate is provided at the lower portion of one side of the denitrification reactor body, and the lower end of the denitrification flue is supported on the upper end of the support plate.

[0010] Furthermore, a reinforcing rib plate is provided between the lower end of the support plate and one side of the denitration reactor body.

[0011] Furthermore, horizontal connecting plates are respectively provided on both sides of the lower end of the above-mentioned denitrification flue, and the above-mentioned connecting plates are overlapped on the upper end of the above-mentioned support plate, and the two are connected by bolts.

[0012] Furthermore, a floor-mounted counterweight support frame is provided at the lower portion of one side of the denitration reactor body.

[0013] Furthermore, it also includes a flue gas heating and supplementary heat unit, which is arranged in the above-mentioned denitrification flue and is used to heat the flue gas in the above-mentioned denitrification flue.

[0014] Furthermore, it also includes a control system, which includes a temperature detector and a controller arranged at the flue gas inlet on the top of the denitrification reactor body. The flue gas inlet on the top of the denitrification reactor body is provided with an electric flow regulating valve, and the temperature detector, flue gas heating and heat supplement unit and electric flow regulating valve are respectively connected to the controller.

[0015] Furthermore, the temperature detector is a thermocouple, and the flue gas heating and supplementary heat unit is an electric heating coil arranged along the denitrification flue.

[0016] Furthermore, the flue gas inlet is wedge-shaped, and is open on one side close to the denitrification flue, and is provided with a first flange side plate at the edge of the opening, and a second flange side plate is provided on one side of the upper end of the denitrification flue, and the first flange side plate and the second flange side plate are fitted together and connected by bolts passing through the two.

[0017] The beneficial effects of the utility model are: simple and reasonable structural design, the traditional denitrification flue and the reactor are arranged on the same wall, which effectively reduces the floor area and space of the overall layout and reduces the use of steel structure layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the intensive SCR denitrification reactor of the present invention;

[0019] Figure 2This is a structural schematic diagram of another embodiment of the intensive SCR denitration reactor of the present utility model;

[0020] Figure 3 This is a structural side view of the intensive SCR denitrification reactor of the present invention.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] 1. Denitrification reactor body; 2. Denitrification flue; 3. Slot; 11. Support plate; 12. Reinforcement plate; 13. Counterweight support frame; 21. Smoke inlet section; 22. Connecting plate; 211. Insert plate. DETAILED DESCRIPTION

[0023] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0024] Example: Figure 1 and 2 As shown, the intensive SCR denitrification reactor of this embodiment includes a denitrification reactor body 1 and a denitrification flue 2. The denitrification flue 2 is vertically arranged and detachably mounted on one side of the denitrification reactor body 1. The upper end of the denitrification flue 2 is connected and communicated with the flue gas inlet at the top of the denitrification reactor body 1, and the lower end of the denitrification flue 2 is bent and provided with a smoke inlet section 21.

[0025] The intensive SCR denitrification reactor of this embodiment integrates the denitrification flue 2 and the denitrification reactor body 1 into an integrated arrangement, and the "shared wall" installation effectively saves space for the two on the site. It provides convenience for the renovation of old sites, effectively saves space, does not require the dismantling and modification of equipment in the existing site, and also reduces the use and layout of steel structures. Combined with site conditions, it can effectively reduce the problem of insufficient production space behind the boiler, providing a new layout method for the owner's renovation. The denitrification flue and reactor can be arranged under the existing site conditions, reducing the owner's substantial renovation costs.

[0026] like Figure 1 As shown, the "front end" of the denitrification reactor body 1 is the boiler A, and the "rear end" is the dust collector B.

[0027] As a preferred embodiment, Figure 3 As shown, a plurality of groups of slots 3 are provided at intervals up and down on one side of the denitrification reactor body 1, each group of the slots 3 is provided with two slots, and are distributed in a horizontal direction. Insert plates 211 corresponding to the slots 3 are respectively fixed on both sides of the denitrification flue 2, and the insert plates 211 are inserted into the corresponding slots 3 from top to bottom.

[0028] In the above embodiment, the denitrification flue 2 adopts a "plug-in" and "hanging" structural method, and uses a plurality of plug-in plates 211 spaced apart from each other to be plugged in and hung one by one in a plurality of slots 3 on one side of the denitrification reactor body 1. Specifically, during installation, the denitrification flue 2 is hoisted to a high position, and then close to one side of the denitrification reactor body 1, and then lowered and adjusted so that the plurality of plug-in plates 211 are respectively plugged in the corresponding slots 3, and then the upper end of the denitrification flue 2 is connected to the flue gas inlet at the top of the denitrification reactor body 1, and at the same time, the smoke inlet section 21 at the lower end of the denitrification flue 2 is connected to the flue gas outlet of the boiler.

[0029] As a preferred embodiment, a support plate 11 is provided at the lower portion of one side of the denitration reactor body 1 , and the lower end of the denitration flue 2 is supported on the upper end of the support plate 11 .

[0030] In the above embodiment, the arrangement of the support plate 11 can provide vertical support to the denitrification flue 2 as a whole, thereby ensuring the safety of the denitrification flue 2 when assembled on one side of the denitrification reactor body 1 .

[0031] As a preferred embodiment, a reinforcing rib plate 12 is provided between the lower end of the support plate 11 and one side of the denitration reactor body 1 .

[0032] In the above embodiment, the reinforcing rib plate 12 can enhance the structural strength of the assembly between the support plate 11 and the denitration reactor body 1. Generally, the reinforcing rib plate 12 is a triangular plate, which has a relatively stable structure.

[0033] As a preferred embodiment, horizontal connecting plates 22 are respectively provided on both sides of the lower end of the denitrification flue 2. The connecting plates 22 are overlapped on the upper end of the support plate 11, and the two are connected by bolts.

[0034] In the above embodiment, connecting plates 22 are welded on both sides of the lower end of the denitrification flue 2. The connecting plates 22 can not only provide stable support on the upper end of the support plate 11, but also facilitate the bolt assembly between itself and the support plate 11.

[0035] As a preferred embodiment, a ground-mounted counterweight support frame 13 is provided at the lower portion of one side of the denitration reactor body 1 .

[0036] In the above embodiment, since the denitrification flue 2 is installed on one side of the denitrification reactor body 1, configuring the counterweight support frame 13 on one side of the denitrification reactor body 1 can effectively improve the center of gravity, so that the entire reactor can be stably supported on the ground and the installation is more stable.

[0037] As a preferred embodiment, it further includes a flue gas heating and supplementary heat unit, which is arranged in the denitrification flue 2 and is used to heat the flue gas in the denitrification flue 2.

[0038] In the above embodiment, when the temperature of the flue gas entering the denitration reactor body 1 is insufficient, the flue gas heating and supplementary heat unit can be used to increase the temperature of the incoming flue gas to ensure smooth subsequent denitration.

[0039] As a preferred embodiment, it also includes a control system, which includes a temperature detector and a controller arranged at the flue gas inlet on the top of the denitrification reactor body 1. The flue gas inlet on the top of the denitrification reactor body 1 is provided with an electric flow control valve, and the temperature detector, flue gas heating and heat supplement unit and electric flow control valve are respectively connected to the controller.

[0040] In the above embodiment, the temperature of the flue gas before entering the denitrification reactor body 1 is detected by a temperature detector and then fed back to the controller. If the temperature meets the standard, the flue gas enters normally. If the temperature is too low, the electric flow control valve is adjusted to reduce the flow rate. At the same time, the gas heating and supplementary heat unit is turned on to increase the temperature of the flue gas flowing through the denitrification flue 2, ensuring the normal denitrification of the subsequent flue gas.

[0041] In this embodiment, the temperature detector is a thermocouple, and the flue gas heating and supplementary heat unit is an electric heating coil arranged along the denitrification flue 2.

[0042] As a preferred embodiment, the flue gas inlet is wedge-shaped, with one side close to the denitrification flue 2 being open, and a first flange side plate being provided at the edge of the opening, and a second flange side plate being provided on one side of the upper end of the denitrification flue 2. The first flange side plate and the second flange side plate are fitted together and connected by bolts passing through the two.

[0043] In the above embodiment, the arrangement of the first flange side plate and the second flange side plate facilitates the connection between the flue gas inlet and the open opening on one side of the upper end of the denitrification flue 2, and the two can be firmly assembled by a circle of multiple bolts.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation to the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An intensive SCR denitrification reactor, characterized by: The invention comprises a denitrification reactor body (1) and a denitrification flue (2), wherein the denitrification flue (2) is arranged vertically and is detachably mounted on one side of the denitrification reactor body (1), the upper end of the denitrification flue (2) is connected to and communicates with the flue gas inlet at the top of the denitrification reactor body (1), and the lower end of the denitrification flue (2) is bent and provided with a smoke inlet section (21).

2. The intensive SCR denitration reactor according to claim 1, characterized in that: A plurality of groups of slots (3) are provided at intervals in the upper and lower directions on one side of the denitrification reactor body (1), each group of the slots (3) being provided with two slots, which are distributed at intervals in the horizontal direction. Insertion plates (211) corresponding to the slots (3) are fixed on both sides of the denitrification flue (2), respectively. The insertion plates (211) are inserted into the corresponding slots (3) from top to bottom.

3. The intensive SCR denitration reactor according to claim 2, characterized in that: A support plate (11) is provided at the lower portion of one side of the denitration reactor body (1), and the lower end of the denitration flue (2) is supported on the upper end of the support plate (11).

4. The intensive SCR denitration reactor according to claim 3, characterized in that: A reinforcing rib plate (12) is provided between the lower end of the support plate (11) and one side of the denitration reactor body (1).

5. The intensive SCR denitration reactor according to claim 3, characterized in that: Horizontal connecting plates (22) are respectively provided on both sides of the lower end of the denitrification flue (2); the connecting plates (22) are superimposed on the upper end of the support plate (11), and the two are connected by bolts.

6. The intensive SCR denitration reactor according to claim 3, characterized in that: A ground-mounted counterweight support frame (13) is provided at the lower portion of one side of the denitration reactor body (1).

7. The intensive SCR denitration reactor according to claim 3, characterized in that: It also includes a flue gas heating and supplementary heat unit, which is arranged in the denitrification flue (2) and is used to heat the flue gas in the denitrification flue (2).

8. The intensive SCR denitration reactor according to claim 7, characterized in that: The invention also includes a control system, which includes a temperature detector and a controller arranged at the flue gas inlet on the top of the denitration reactor body (1); the flue gas inlet on the top of the denitration reactor body (1) is provided with an electric flow regulating valve, and the temperature detector, the flue gas heating and supplementary heat unit and the electric flow regulating valve are respectively connected to the controller.

9. The intensive SCR denitration reactor according to claim 8, characterized in that: The temperature detector is a thermocouple, and the flue gas heating and supplementary heat unit is an electric heating coil arranged along the denitrification flue (2).

10. The intensive SCR denitration reactor according to any one of claims 1 to 9, characterized in that: The flue gas inlet is wedge-shaped, and is open on one side close to the denitrification flue (2), and is provided with a first flange side plate at the edge of the opening. A second flange side plate is provided on one side of the upper end of the denitrification flue (2). The first flange side plate and the second flange side plate are fitted together and connected by bolts passing through the two.

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