Low-temperature SCR (Selective Catalytic Reduction) flue gas denitration device for household garbage incineration plant

Abstract

The utility model relates to the technical field of flue gas pollution prevention and control, and discloses a low-temperature SCR flue gas denitration device for a household garbage incineration plant, a flue gas inlet pipe and a bag-type dust collector are provided with fixing mechanisms, the bag-type dust collector and a base are provided with clamping mechanisms, and each clamping mechanism comprises a moving assembly and a stabilizing assembly; the moving assembly comprises a double-shaft motor, threaded rods are fixedly connected to the front side and the rear side of the double-shaft motor, and clamping plates are fixedly connected to the upper ends of the inner sides of the left supporting plate and the right supporting plate. According to the low-temperature SCR flue gas denitration device for the household garbage incineration plant, a clamping plate is driven by a clamping mechanism and a supporting plate to clamp and fix a bag-type dust collector, the bag-type dust collector can be supported and fixed, the situation that deviation occurs between the bag-type dust collector and a flue gas inlet pipe, and consequently flue gas overflows can be avoided, a long block is inserted into a long groove, the triangular stabilization principle can be utilized, and the stability of the flue gas denitration device is improved. And when the bag-type dust collector is clamped and fixed by the clamping plates, the supporting plates cannot be fractured under the action of gravity.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas pollution prevention and control, in particular to a low-temperature SCR flue gas denitration device for a domestic waste incineration plant. Background Technique

[0002] Domestic waste is an important factor causing environmental pollution. Therefore, it is necessary to harmlessly treat domestic waste. Waste incineration can not only treat domestic waste, but also generate electricity by using the heat generated from domestic waste incineration.

[0003] During the use process, a large amount of flue gas will be generated during the incineration of such waste. These flue gases contain a large amount of pollutants such as NO and NO2. If NO and NO2 are discharged into the atmosphere without treatment, it will cause air pollution. Therefore, denitration treatment is required when discharging the flue gas to eliminate NO and NO2 in the flue gas. When treating the flue gas, it is necessary to use a bag filter (FF) to remove large particles in the flue gas. At this time, it is necessary to fixedly install the bag filter (FF) to prevent the overflow of flue gas. Content of the Utility Model

[0004] The purpose of the utility model is to provide a low-temperature SCR flue gas denitration device for a domestic waste incineration plant to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A low-temperature SCR flue gas denitration device for a domestic waste incineration plant, including a bag filter and an SCR reactor. A smoke inlet pipe is fixedly connected to the left side of the SCR reactor, a base is fixedly connected to the bottom of the SCR reactor, a fixing mechanism is arranged on the smoke inlet pipe and the bag filter, and a clamping mechanism is arranged on the bag filter and the base;

[0006] The clamping mechanism includes a moving component and a stabilizing component, and the stabilizing component is arranged on the moving component;

[0007] The moving component includes a double-shaft motor, the double-shaft motor is fixedly connected to the center of the top of the base, limiting plates are fixedly connected to both the front and rear sides of the base, threaded rods are fixedly connected to both the front and rear sides of the double-shaft motor, a T-shaped groove is opened on the top of the base, a moving plate is threadedly connected to the surface of the threaded rod, T-shaped blocks are fixedly connected to both the left and right ends of the bottom of the moving plate, support plates are fixedly connected to both the left and right ends of the top of the moving plate, and clamping plates are fixedly connected to the upper ends of the inner sides of the left and right support plates. The clamping plates are arranged on the surface of the bag filter.

[0008] Preferably, the number of the threaded rods is two, the surfaces of the two threaded rods are rotatably connected to the inside of the limiting plate, and the thread specifications on the surfaces of the front and rear threaded rods are the same and the directions are opposite.

[0009] Preferably, the number of the T-shaped grooves is two, the number of the T-shaped blocks is four and they are grouped in pairs. The surface of the T-shaped block is slidably connected to the inside of the T-shaped groove. When the T-shaped block slides inside the T-shaped groove, the moving plate can move more steadily.

[0010] Preferably, the stabilizing assembly includes a chute which is opened on the inner sides of the left and right support plates. A slider is slidably connected inside the chute. An installation plate is fixedly connected to the inner side of the slider. An inclined plate is fixedly connected to the bottom of the installation plate. A fixed plate is fixedly connected to the bottom of the inclined plate. Long blocks are fixedly connected to the left and right ends of the bottom of the fixed plate. Long grooves are opened at the left and right ends of the top of the moving plate. Second bolts are threadedly connected to both the long blocks and the inside of the moving plate.

[0011] Preferably, the top of the long groove is open, and the surface of the long block is inserted into the long groove. When the long block is inserted into the long groove, the triangular stability principle can be utilized so that when the clamping plate clamps and fixes the bag filter, the support plate will not break under the action of gravity.

[0012] Preferably, the fixing mechanism includes a connecting seat which is fixedly connected to the front and rear sides of the smoke inlet pipe. A rectangular groove is opened on the left side of the connecting seat. Long rods are fixedly connected to the front and rear sides of the bag filter. A rotating plate is rotatably connected to the surface of the long rod. First bolts are threadedly connected to both the rotating plate and the inside of the connecting seat.

[0013] Preferably, the top and the left side of the rectangular groove are both open, and the surface of the rotating plate is inserted into the rectangular groove. When the rotating plate is inserted into the rectangular groove, the bag filter and the smoke inlet pipe can be further installed and fixed, avoiding the situation that the bag filter and the smoke inlet pipe are not firmly installed.

[0014] Compared with the prior art, the present utility model provides a low-temperature SCR flue gas denitration device for a domestic waste incineration plant, which has the following beneficial effects:

[0015] 1. For the low-temperature SCR flue gas denitration device of the domestic waste incineration plant, through the clamping mechanism, the double-shaft motor drives the threaded rod to rotate, and the two moving plates move towards the opposite side. The moving plates drive the support plates to move, and the support plates drive the clamping plates to clamp and fix the bag filter, so that the bag filter can be supported and fixed, and the offset between the bag filter and the smoke inlet pipe can be avoided, resulting in the overflow of flue gas. When the long block is inserted into the long groove, the triangular stability principle can be utilized so that when the clamping plate clamps and fixes the bag filter, the support plate will not break under the action of gravity.

[0016] 2. The low-temperature SCR flue gas denitration device of this domestic waste incineration plant can further install and fix the bag filter and the inlet flue pipe by means of a fixing mechanism to drive the rotating plate to rotate on the surface of the long rod, so that the rotating plate is inserted into the rectangular groove, avoiding the situation that the bag filter and the inlet flue pipe are not firmly installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0018] Figure 1 It is a three-dimensional view of the overall structure of the present invention;

[0019] Figure 2 It is a schematic structural view of the moving component;

[0020] Figure 3 For Figure 2 a schematic structural view of the intercepted part in;

[0021] Figure 4 It is a schematic structural view of the stabilizing component;

[0022] Figure 5 For Figure 4 a schematic enlarged structural view of part A in;

[0023] Figure 6 It is a schematic structural view of the fixing mechanism;

[0024] Figure 7 For Figure 6 a schematic enlarged structural view of part B in.

[0025] In the figure: 1, base; 2, bag filter; 3, inlet flue pipe; 4, fixing mechanism; 41, rotating plate; 42, long rod; 43, first bolt; 44, rectangular groove; 45, connecting seat; 5, SCR reactor; 6, clamping mechanism; 61, moving component; 611, limiting plate; 612, threaded rod; 613, clamping plate; 614, support plate; 615, biaxial motor; 616, moving plate; 617, T-shaped block; 618, T-shaped groove; 62, stabilizing component; 621, slider; 622, chute; 623, long groove; 624, long block; 625, second bolt; 626, fixing plate; 627, inclined plate; 628, mounting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The present utility model provides the following technical solutions:

[0029] Embodiment 1, in combination with Figures 1 to 5 , a low-temperature SCR flue gas denitration device for a domestic waste incineration plant, including a bag filter 2 and an SCR reactor 5. A smoke inlet pipe 3 is fixedly connected to the left side of the SCR reactor 5, a base 1 is fixedly connected to the bottom of the SCR reactor 5, a fixing mechanism 4 is arranged on the smoke inlet pipe 3 and the bag filter 2, and a clamping mechanism 6 is arranged on the bag filter 2 and the base 1;

[0030] The clamping mechanism 6 includes a moving component 61 and a stabilizing component 62, and the stabilizing component 62 is arranged on the moving component 61;

[0031] The moving component 61 includes a double-shaft motor 615. The double-shaft motor 615 is fixedly connected to the center of the top of the base 1. Limiting plates 611 are fixedly connected to both the front and rear sides of the base 1. Threaded rods 612 are fixedly connected to both the front and rear sides of the double-shaft motor 615. A T-shaped groove 618 is formed in the top of the base 1. A moving plate 616 is threadedly connected to the surface of the threaded rod 612. T-shaped blocks 617 are fixedly connected to both the left and right ends of the bottom of the moving plate 616. Support plates 614 are fixedly connected to both the left and right ends of the top of the moving plate 616. Clamping plates 613 are fixedly connected to the upper ends of the inner sides of the left and right support plates 614, and the clamping plates 613 are arranged on the surface of the bag filter 2;

[0032] The number of the threaded rods 612 is two. The surfaces of the two threaded rods 612 are rotatably connected to the inside of the limiting plates 611. The thread specifications on the surfaces of the front and rear threaded rods 612 are the same and the directions are opposite. The number of the T-shaped grooves 618 is two. The number of the T-shaped blocks 617 is four and they are grouped in pairs. The surface of the T-shaped block 617 is slidably connected to the inside of the T-shaped groove 618;

[0033] The stabilizing component 62 includes a slide groove 622, which is opened on the inner sides of the left and right support plates 614. A slider 621 is slidably connected inside the slide groove 622. A mounting plate 628 is fixedly connected to the inner side of the slider 621. An inclined plate 627 is fixedly connected to the bottom of the mounting plate 628. A fixed plate 626 is fixedly connected to the bottom of the inclined plate 627. Long blocks 624 are fixedly connected to the left and right ends of the bottom of the fixed plate 626. Long grooves 623 are opened on the left and right ends of the top of the movable plate 616. Second bolts 625 are threadedly connected to the inside of the long block 624 and the movable plate 616. The top of the long groove 623 is set to be open, and the inside of the long groove 623 and the surface of the long block 624 are plugged into each other.

[0034] Furthermore, the dual-axis motor 615 drives the threaded rod 612 to rotate, and the two movable plates 616 move to the opposite side. The movable plate 616 drives the support plate 614 to move, and the support plate 614 drives the clamping plate 613 to clamp and fix the bag-type dust collector 2. The bag-type dust collector 2 can be supported and fixed, and the offset between the bag-type dust collector 2 and the smoke inlet pipe 3 can be avoided, which causes the overflow of smoke. The long block 624 is inserted into the long groove 623. The triangular stabilization principle can be used to ensure that when the clamping plate 613 clamps and fixes the bag-type dust collector 2, the support plate 614 will not be broken under the action of gravity.

[0035] Example 2, see Figures 1 - 7 On the basis of the first embodiment, the fixing mechanism 4 further comprises a connecting seat 45, the connecting seat 45 is fixedly connected to the front and rear sides of the smoke inlet pipe 3, a rectangular groove 44 is opened on the left side of the connecting seat 45, the bag filter 2 is fixedly connected to the front and rear sides with a long rod 42, the surface of the long rod 42 is rotatably connected with a rotating plate 41, the rotating plate 41 and the connecting seat 45 are both threadedly connected with a first bolt 43, the top and left side of the rectangular groove 44 are both set to be openings, and the surface of the rotating plate 41 and the inside of the rectangular groove 44 are plugged.

[0036] Furthermore, by moving the rotating plate 41 to rotate on the surface of the long rod 42, the rotating plate 41 is inserted into the rectangular groove 44, so that the bag filter 2 and the smoke inlet pipe 3 can be further installed and fixed, avoiding the situation where the bag filter 2 and the smoke inlet pipe 3 are not installed firmly.

[0037] In actual operation, when this device is used, low-temperature selective catalytic reduction (SCR) technology is an effective method for denitrification of flue gas in domestic waste incineration plants. Low-temperature SCR technology is suitable for situations where the flue gas temperature is relatively low. Usually in a waste incineration plant, the flue gas temperature may drop to about 150°C after cooling and other treatment steps, which makes low-temperature SCR technology a feasible option. Before entering the SCR reactor 5, the flue gas needs to be pre-treated to remove particulate matter and acidic gas. This is to protect the catalyst and ensure the denitrification efficiency. It needs to pass through a bag filter 2 to remove large particulate matter and prevent catalyst poisoning and clogging. When the bag filter 2 is set up on the left side of the smoke inlet pipe 3, the dual-axis motor 615 is first started to drive the threaded rods 612 at both ends to rotate. At this time, the front and rear two moving plates 616 move to the opposite side on the two threaded rods 612. When the moving plate 616 moves, it can drive the support plate 614 to move. The support plate 614 drives the clamping plate 613 to clamp and fix the bag filter 2. The bag filter 2 can be supported and fixed, which can avoid the deviation between the bag filter 2 and the smoke inlet pipe 3, resulting in the overflow of flue gas.

[0038] At the same time, when the mounting plate 628 is moved to drive the slider 621 to slide in the slide groove 622, the mounting plate 628 drives the inclined plate 627, the inclined plate 627 drives the fixed plate 626, and the fixed plate 626 drives the long block 624 to be inserted into the long groove 623. The second bolt 625 is used to thread the movable plate 616 and the long block 624. The triangular stabilization principle can be used to ensure that when the clamping plate 613 clamps and fixes the bag filter 2, the support plate 614 will not be broken under the action of gravity;

[0039] Move the rotating plate 41 again to rotate on the surface of the long rod 42, so that the rotating plate 41 is inserted into the rectangular groove 44, and the rotating plate 41 and the connecting seat 45 are threadedly fixed by the first bolt 43, so that the bag-type dust collector 2 and the smoke inlet pipe 3 can be further installed and fixed, avoiding the situation that the bag-type dust collector 2 and the smoke inlet pipe 3 are not installed firmly.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A low-temperature SCR flue gas denitration device for a domestic waste incineration plant, comprising a bag filter (2) and an SCR reactor (5), characterized in that: The left side of the SCR reactor (5) is fixedly connected with a smoke inlet pipe (3), the bottom of the SCR reactor (5) is fixedly connected with a base (1), a fixing mechanism (4) is arranged on the smoke inlet pipe (3) and the bag filter (2), and a clamping mechanism (6) is arranged on the bag filter (2) and the base (1); The clamping mechanism (6) includes a moving component (61) and a stabilizing component (62), and the stabilizing component (62) is arranged on the moving component (61); The moving component (61) includes a bi-axial motor (615), the bi-axial motor (615) is fixedly connected to the center of the top of the base (1), limiting plates (611) are fixedly connected to both the front and rear sides of the base (1), threaded rods (612) are fixedly connected to both the front and rear sides of the bi-axial motor (615), a T-shaped groove (618) is formed in the top of the base (1), a moving plate (616) is threadedly connected to the surface of the threaded rod (612), T-shaped blocks (617) are fixedly connected to both the left and right ends of the bottom of the moving plate (616), support plates (614) are fixedly connected to both the left and right ends of the top of the moving plate (616), clamping plates (613) are fixedly connected to the upper ends of the inner sides of the left and right support plates (614), and the clamping plates (613) are arranged on the surface of the bag filter (2).

2. The low-temperature SCR flue gas denitration device for domestic waste incineration plants according to claim 1, wherein: The number of the threaded rods (612) is two, the surfaces of the two threaded rods (612) are rotatably connected to the inside of the limiting plates (611), and the thread specifications on the surfaces of the front and rear threaded rods (612) are the same and the directions are opposite.

3. The low-temperature SCR flue gas denitration device for a domestic waste incineration plant according to claim 1, wherein: The number of the T-shaped grooves (618) is two, the number of the T-shaped blocks (617) is four and they are in two groups, and the surfaces of the T-shaped blocks (617) are slidably connected to the inside of the T-shaped grooves (618).

4. A low-temperature SCR flue gas denitration device for a domestic waste incineration plant according to claim 1, characterized in that: The stabilizing component (62) includes a chute (622), the chute (622) is formed in the inner sides of the left and right support plates (614), a slider (621) is slidably connected to the inside of the chute (622), a mounting plate (628) is fixedly connected to the inner side of the slider (621), an inclined plate (627) is fixedly connected to the bottom of the mounting plate (628), a fixing plate (626) is fixedly connected to the bottom of the inclined plate (627), long blocks (624) are fixedly connected to both the left and right ends of the bottom of the fixing plate (626), long grooves (623) are formed in both the left and right ends of the top of the moving plate (616), and second bolts (625) are threadedly connected to both the long blocks (624) and the inside of the moving plate (616).

5. The low-temperature SCR flue gas denitration device for a domestic waste incineration plant according to claim 4, characterized in that: The top of the long groove (623) is open, and the inside of the long groove (623) is inserted into the surface of the long block (624).

6. The low-temperature SCR flue gas denitration device for a domestic waste incineration plant according to claim 1, characterized in that: The fixing mechanism (4) includes a connecting seat (45), the connecting seat (45) is fixedly connected to the front and rear sides of the smoke inlet pipe (3), a rectangular groove (44) is formed on the left side of the connecting seat (45), long rods (42) are fixedly connected to the front and rear sides of the bag filter (2), a rotating plate (41) is rotatably connected to the surface of the long rod (42), and first bolts (43) are threadedly connected to the rotating plate (41) and the inside of the connecting seat (45).

7. A low-temperature SCR flue gas denitration device for a domestic waste incineration plant according to claim 6, characterized in that: The top and left side of the rectangular groove (44) are both provided with openings, and the surface of the rotating plate (41) is inserted into the inside of the rectangular groove (44).

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