Preparation device of arsenic poisoning SCR denitration catalyst

Abstract

The preparation device comprises a transmission shaft which is arranged on a reaction kettle in a circumferential rotation mode, and first stirring paddles which are arranged in a circumferential array mode are fixedly installed at the end of the transmission shaft; a side wing baffle is axially and rotatably arranged on the inner wall of the reaction kettle, is in a vertical default state, and is in sliding connection with an arc-shaped surface of an arc-shaped blocking and dismounting part arranged on the first stirring paddle; and the reset elastic piece is used for keeping the side wing baffle in a default state. According to the preparation device of the arsenic-poisoned SCR denitration catalyst, a water coating can be quickly crushed in a manner of transferring liquid through the vibration of the side wing baffles, so that powdery materials are fully dissolved.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, and in particular to a preparation device for an arsenic-poisoned SCR denitration catalyst. Background Art

[0002] SCR denitrification catalyst is one of the key components in SCR technology, which is used to catalyze the reaction of ammonia (NH3) and NOx gas, converting it into nitrogen (N2) and water vapor (H2O), thereby reducing emissions.

[0003] In the preparation of SCR denitration catalyst, the reactor is the place where its final use is produced. Referring to the publication (announcement) number: CN114308013A, the publication (announcement) date: 2022-04-12, a low-cost high-temperature denitration catalyst production process is disclosed, comprising the following steps: (A) blank mixing: in a mixing device, the carrier and silica, the precursor of the catalytic component, the active liquid, the extrusion aid, the acid solution, the alkali solution, the pore-forming agent, the substance that increases the plasticity of the mud, the binder, and the deionized water are uniformly mixed in proportion, and the pH value of the obtained blank is controlled to be >8.10 and the water content is 28-30%; (B) the blank after the initial aging is filtered and then aged for the second time, and then extruded into shape, and then dried and calcined to obtain a high-temperature denitration catalyst.

[0004] In the prior art including the above-mentioned patents, the stirring mechanism determines the decisive component of the reactor for mixing materials. A certain amount of powdered material needs to be squeezed into the preparation of the SCR denitration catalyst. When the powdered material enters the liquid, a water coat will inevitably appear to wrap it, which is solved by physical phenomena. The conventional treatment method is to use high-speed rotation to break the water coat so that the powdered material can be fully dissolved. How to break the water coat without high-speed rotation, so that the powdered material can be fully dissolved, is expected to be solved well! Utility Model Content

[0005] The purpose of this utility model is to provide a preparation device of arsenic poisoning SCR denitration catalyst to solve the above problems.

[0006] In order to achieve the above purpose, this utility provides the following technical solutions:

[0007] A preparation device for an arsenic-poisoned SCR denitration catalyst comprises a transmission shaft rotatably arranged on a reaction kettle, and a first stirring paddle arranged in a circumferential array is fixedly mounted on the end of the transmission shaft;

[0008] The inner wall of the reactor is provided with a side baffle for axial rotation, the side baffle is vertical by default, and is in sliding connection with the arc surface of the arc-shaped blocking portion provided on the first stirring paddle;

[0009] Also included is a reset elastic member, which is used to keep the side wing baffle in a default state.

[0010] Preferably, the first stirring paddle is a trapezoidal structure with legs, and the upper bottom is an inclined surface and is parallel to the bottom of the reactor.

[0011] Preferably, the transmission shaft is provided with a double-paddle stirring paddle symmetrically arranged along the shaft diameter direction;

[0012] The distance between the two double-blade stirring paddles is smaller than the length of the side wing baffles, and the centers of the two paddles are on the same waterline.

[0013] Preferably, the first stirring paddle is a frame structure, and blocking parts arranged in a linear array are provided in the frame.

[0014] Preferably, the blocking portion is divided into a first inclined portion and a second inclined portion according to the structure, and the angle between the first inclined portion and the second inclined portion is 1225°-135°.

[0015] Preferably, an elliptical rotating portion is fixedly provided on the side baffle;

[0016] The resetting elastic member comprises a push portion with a blocking spring disposed at one end and an arc surface at the other end being slidably connected to the elliptical rotating portion.

[0017] In the above technical scheme, a preparation device for an arsenic poisoning SCR denitrification catalyst provided by the present invention has the following beneficial effects: the arc-shaped baffle portion on the rotating first stirring paddle is periodically contacted with the side baffle plate, and the side baffle plate is rotated at a certain angle under the push, and when the arc-shaped baffle portion is disengaged, it is instantly reset by the reset elastic action, thereby causing the nearby liquid to vibrate, thereby causing the water coat to break, so that the powdery material is fully dissolved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 The overall structural diagram provided for this practical embodiment;

[0020] Figure 2 A schematic cross-sectional structure diagram provided for this practical embodiment;

[0021] Figure 3A schematic diagram of the horizontal cross-sectional structure of the first stirring paddle provided in this practical embodiment;

[0022] Figure 4 A schematic diagram of the cross-sectional structure of the arc-shaped retaining and dismantling portion provided in this practical embodiment.

[0023] Description of reference numerals:

[0024] 1. Reactor; 2. Transmission shaft; 3. First stirring paddle; 31. Arc-shaped blocking part; 32. Blocking part; 321. First inclined part; 322. Second inclined part; 4. Side baffle; 41. Elliptical rotating part; 5. Double-blade stirring paddle; 51. Stop spring; 52. Pushing part; 53. Installation cabin; 6. Three-phase asynchronous motor. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a preparation device for an arsenic-poisoned SCR denitration catalyst comprises a transmission shaft 2 circumferentially rotatably arranged on a reactor 1, and first stirring paddles 3 arranged in a circumferential array are fixedly mounted on the end of the transmission shaft 2;

[0027] The inner wall of the reactor 1 is provided with a side baffle 4 for axial rotation. The side baffle 4 is vertical by default and is in sliding connection with the arc surface of the arc-shaped blocking portion 31 provided on the first stirring paddle 3.

[0028] A reset elastic member is also included, which is used to keep the side wing baffle 4 in a default state.

[0029] Specifically, the transmission shaft 2 in the above embodiment is driven by a three-phase asynchronous motor 6 installed at the center of the top of the reactor 1 to rotate at a predetermined speed.

[0030] Secondly, the number of the first stirring paddles 3 in the embodiment is at least three.

[0031] Furthermore, the resetting elastic member in the above embodiment may be a spiral spring, or an elastic metal plate, or any other elastic member known to those skilled in the art.

[0032] In the above technology, the arc-shaped baffle 31 on the rotating first stirring paddle 3 is periodically contacted with the side baffle 4, and after the side baffle 4 is rotated at a certain angle under the push, the arc-shaped baffle 31 is instantly reset by the reset elastic action after being disengaged, thereby causing the nearby liquid to vibrate, thereby causing the water coat to break, so that the powdery material is fully dissolved.

[0033] As an embodiment further provided by the present invention, the first stirring paddle 3 is specifically a trapezoidal structure with legs, and the upper bottom is an inclined surface and remains parallel to the bottom of the reactor 1.

[0034] Specifically, the first stirring paddle 3 with a trapezoidal support structure in the above embodiment can obtain the maximum stirring area at the bottom of the reactor 1 .

[0035] As another embodiment further provided by the present invention, the transmission shaft 2 is provided with a double-paddle stirring paddle 5 symmetrically arranged along the shaft diameter direction;

[0036] The distance between the two double-blade stirring paddles 5 is smaller than the length of the side baffles 4, and the centers of the two paddles are on the same waterline.

[0037] Specifically, the powder material put into forming the water coat moves toward the axis under the vortex formed by the double-paddle stirring paddles 5, and is gathered between multiple side baffles 4. Therefore, when the arc-shaped baffle 31 on the first stirring paddle 3 periodically contacts the side baffle 4 and causes the side baffle 4 to rotate at a certain angle under the resistance, when the arc-shaped baffle 31 is disengaged, it is instantly reset by the reset elasticity, thereby causing the nearby liquid to vibrate, thereby causing the water coat to break.

[0038] As another embodiment further provided by the present invention, the first stirring paddle 3 is a frame structure, and blocking parts 32 arranged in a linear array are provided in the frame.

[0039] Combination Figure 3 It can be seen that the blocking portion 32 is divided into a first inclined portion 321 and a second inclined portion 322 according to the structure, and the angle between the first inclined portion 321 and the second inclined portion 322 is 1225°-135°.

[0040] Specifically, the purpose is to further strengthen the first stirring paddle 3 so that the bottom of the reactor 1 can obtain the maximum stirring effect.

[0041] As another embodiment further provided by the present invention, an elliptical rotating portion 41 is fixedly provided on the side wing baffle 4;

[0042] The resetting elastic member includes a blocking spring 51 at one end and a pushing portion 52 whose arc surface at the other end is slidably connected to the elliptical rotating portion 41 .

[0043] Specifically, in the above embodiment, when the arc-shaped pick-up portion 31 on the first stirring paddle 3 periodically contacts the side wing baffle 4 and causes the side wing baffle 4 to rotate at a certain angle under the push, the two long ends of the pushing portion 52 are in contact with the end surface of the pushing portion 52. When the arc-shaped pick-up portion 31 is separated from the side wing baffle 4, the blocking spring 51 is pressed against the two short ends of the pushing portion 52 so as to contact the end surface of the pushing portion 52.

[0044] In addition, it should be noted that a mounting chamber 53 is welded inside the reactor 1 in the embodiment, and the blocking spring 51 and the push portion 52 are both assembled in the mounting chamber 53, and the elliptical rotating portion 41 on the side baffle 4 is installed in the mounting chamber 53 through a bearing.

[0045] The above description is only for the purpose of illustration of some exemplary embodiments of the present invention. It is obvious that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A preparation device for an arsenic-poisoned SCR denitration catalyst, characterized in that: It comprises a transmission shaft (2) which is circumferentially rotatably arranged on a reaction kettle (1), and a first stirring paddle (3) which is arranged in a circumferential array is fixedly mounted on the end of the transmission shaft (2); The inner wall of the reactor (1) is provided with a side baffle (4) for axial rotation, and the side baffle (4) is in a vertical state by default and is in sliding connection with the arc surface of the arc-shaped blocking portion (31) provided on the first stirring paddle (3); It also comprises a reset elastic member, which is used to keep the side wing baffle (4) in a default state.

2. The preparation device of an arsenic-poisoned SCR denitration catalyst according to claim 1, characterized in that: The first stirring paddle (3) is specifically a support-leg trapezoidal structure, and the upper bottom is an inclined surface, and remains parallel to the bottom of the reaction kettle (1).

3. The preparation device of an arsenic-poisoned SCR denitration catalyst according to claim 1, characterized in that: The transmission shaft (2) is provided with double-blade stirring paddles (5) arranged symmetrically along the shaft diameter direction; The distance between the two double-blade stirring paddles (5) is smaller than the length of the side baffles (4), and the centers of the two paddles are on the same waterline.

4. The preparation device of an arsenic-poisoned SCR denitration catalyst according to claim 1, characterized in that: The first stirring paddle (3) is a frame structure, and blocking portions (32) arranged in a linear array are provided in the frame.

5. The preparation device of an arsenic-poisoned SCR denitration catalyst according to claim 4, characterized in that: The blocking portion (32) is divided into a first inclined portion (321) and a second inclined portion (322) according to the structure, and the angle between the first inclined portion (321) and the second inclined portion (322) is 1225°-135°.

6. The preparation device of an arsenic-poisoned SCR denitration catalyst according to claim 1, characterized in that: An elliptical rotating portion (41) is fixedly provided on the side wing baffle (4); The resetting elastic member comprises a push portion (52) having a blocking spring (51) disposed at one end and an arcuate surface at the other end slidably connected to the elliptical rotating portion (41).

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