Airflow uniform distribution and energy saving device of limestone powder production dust collector

Abstract

The utility model relates to an airflow uniform-distribution and energy-saving device of a limestone pulverizing dust collector, which is arranged at the rear end of a flue and the front end of the dust collector, and a first-stage airflow uniform-distribution device, a second-stage airflow uniform-distribution device and a third-stage airflow uniform-distribution device are sequentially arranged in an inlet horn according to the flue gas direction; each stage of uniform distributor consists of a blade and a frame; the top of the inlet horn is provided with solar photovoltaic power supply equipment for supplying power to each stage of blade and providing rotation kinetic energy; the blades of the first-stage uniform airflow distributor are in the form of large blades, and the blades of the second-stage uniform airflow distributor and the blades of the third-stage uniform airflow distributor are in the form of small blades. According to the utility model, the multistage airflow uniform distributors are uniformly distributed in the inlet horn of the dust collector, so that the flue gas is gradually and uniformly diffused, the flue gas is dynamically adjusted to flow into the dust collector, the uniform distribution is better, the dust removal efficiency of the dust collector is greatly improved, and the running resistance and abrasion of equipment are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of limestone powder making and smoke dust environmental protection, concretely to airflow uniform distribution and energy -conserving device of limestone powder making dust collector. BACKGROUND

[0002] The limestone powder making system includes crushing, powder making, grading and powder collecting steps. The flue gas dust concentration of the powder making system is usually 500g / Nm3-1000g / Nm3, which is a high dust environment. When the flue gas with dust passes through the inlet horn to the dust collector, the airflow is dispersed by the uniform distribution device, and the airflow uniformity greatly affects the dust collection efficiency. If the airflow uniformity is poor, the high dust flue gas will wash the filter bag and internal components, causing equipment damage and reducing the service life of the filter bag. In addition, different structures of airflow uniform distribution devices will produce different operating resistances, so the uniformity and structure of the airflow uniform distribution device are crucial.

[0003] The existing dust collector uniform distribution plate in the field of flue gas dust removal is generally provided with multi-stage fixed orifice plates or blade structures with guide plates at the inlet horn. Patent application No. 200520014771.2, named a resistance and guide type airflow distribution device of an electrostatic precipitator, has three layers of airflow distribution plates, and guide plates are arranged on the back two layers of orifice plates. The airflow distribution plate has holes with a diameter of Φ55cm-Φ90cm. The flue gas passes through the holes and enters the dust collector. This structure is usually used in an environment with an inlet dust concentration of 10g / Nm3-100g / Nm3. It can play a role in airflow uniform distribution to a certain extent, but its opening rate is low (40%-50%), the flue gas flow area is small, resulting in a large operating resistance. Due to the complex operating conditions and the influence of dust properties, some holes are blocked by clumps. At the same time, the airflow distribution plate is severely impacted and worn by dust, reducing its service life. It is not suitable for use in a powder making system with high dust concentration.

[0004] Patent publication No. CN208373341U, named an electrostatic precipitator airflow uniform distribution system, uses a stainless steel mesh filter and a stainless steel fan blade to reduce airflow. The outside is composed of an air inlet cover and an airflow cover. In actual operation, the flue gas flow rate at the air inlet cover is lower than that at the airflow cover, which will settle and accumulate most of the dust, resulting in less dust entering the dust collector. The stainless steel mesh does not have a matching dust cleaning device, which must be stopped for cleaning. In addition, the front end is provided with a stainless steel mesh, so even if the fan blade is not set, the airflow will be naturally and uniformly distributed in the airflow cover. Setting the corresponding device will only increase the operating resistance, and the overall mechanism is not easy to maintain.

[0005] The patent publication CN219785145U, named a wet-type electric dust collector airflow uniform distribution device, is provided with multiple speed reduction fan leaves, an inner-outer combined airflow redistribution mechanism and two layers of orifice plates. When the flue gas volume is constant, the flue gas passing through the fan leaf device can disperse the airflow, and the fan leaves can play a certain airflow uniform effect, but the wind speed is basically unchanged and cannot play a speed reduction effect, but will increase the fan leaf rotating work. The subsequent airflow redistribution mechanism is an annular necking and expansion, which forms an annular airflow that will impact the orifice plate, and the orifice plate has a low opening rate. Overall, the airflow uniform effect is not good, causing large running resistance, shortening the service life of the orifice plate, and the overall structure is not easy to maintain. Practical new type content

[0006] In view of the deficiencies of the prior art, the airflow uniform distribution and energy-saving device of the limestone powder making dust collector is provided to solve the problems of easy caking and blocking on the inlet end uniform distribution device in the powder making system, reduce the running resistance and save energy, and improve the airflow uniformity.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an airflow uniform distribution and energy-saving device of a limestone powder making dust collector is arranged at the rear end of the flue and the front end of the dust collector, and comprises an inlet horn.

[0008] The first-stage airflow distributor comprises first-stage airflow distributor blades and a first-stage airflow distributor frame; the second-stage airflow distributor comprises second-stage airflow distributor blades and a second-stage airflow distributor frame; and the third-stage airflow distributor comprises third-stage airflow distributor blades and a third-stage airflow distributor frame. The first-stage airflow distributor frame, the second-stage airflow distributor frame and the third-stage airflow distributor frame are all square frames, one side edge of which is installed above the inlet horn, and a blade mounting rod is arranged in the middle of the frame body. The first-stage airflow distributor blades are fixedly installed on the blade mounting rod of the first-stage airflow distributor frame, the second-stage airflow distributor blades are fixedly installed on the blade mounting rod of the second-stage airflow distributor frame, and the third-stage airflow distributor blades are fixedly installed on the blade mounting rod of the third-stage airflow distributor frame.

[0009] Further, the top of the inlet horn is provided with a solar photovoltaic power supply device, which is connected to the first-stage airflow distributor blades, the second-stage airflow distributor blades and the third-stage airflow distributor blades through a circuit.

[0010] Further, the first-stage airflow distributor blades are in the form of large blades and are made of wear-resistant material, and the second-stage airflow distributor blades and the third-stage airflow distributor blades are in the form of small blades and are made of wear-resistant material.

[0011] Further, the primary airflow distributor blades, the secondary airflow distributor blades and the tertiary airflow distributor blades are uniformly arranged.

[0012] Further, the primary airflow distributor, the secondary airflow distributor and the tertiary airflow distributor are uniformly arranged in the inlet horn as independent components.

[0013] Compared with the prior art, the utility model provides a kind of airflow distribution and energy-saving device of limestone powder collecting dust device, with following beneficial effects:

[0014] 1, the utility model discloses a plurality of airflow distributors are uniformly arranged in the inlet horn of dust collector, so that flue gas is gradually and evenly diffused, and the flue gas is adjusted into dust collector in dynamic form, the uniformity is more optimal, and the dust removal efficiency of dust collector is greatly improved, and equipment running resistance and abrasion are reduced.

[0015] 2, the utility model discloses that solar photovoltaic power supply equipment is provided for the blade rotation of airflow distributor, which reduces the kinetic energy loss of airflow to a certain extent, reduces system running resistance, reduces fan operation energy consumption, to achieve energy-saving effect.

[0016] 3, the device of the utility model is integrated, each distributor is independent component, and is taken out by integral hoisting, which is convenient to disassemble, does not need internal operation, and is convenient to overhaul and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure front view schematic diagram of the utility model;

[0018] Figure 2 It is the side view partial section view schematic diagram of the inlet horn of the utility model;

[0019] Figure 3 It is the schematic diagram of the primary airflow distributor of the utility model;

[0020] Figure 4 It is the schematic diagram of the secondary airflow distributor of the utility model;

[0021] Figure 5 It is the schematic diagram of the tertiary airflow distributor of the utility model;

[0022] In the figure: 1 - inlet horn, 2 - first airflow distributor, 3 - second airflow distributor, 4 - third airflow distributor, 5 - solar photovoltaic power supply device, 6 - flue, 7 - dust collector, 21 - first airflow distributor blade, 22 - first airflow distributor frame, 31 - second airflow distributor blade, 32 - second airflow distributor frame, 41 - third airflow distributor blade, 42 - third airflow distributor frame. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-5 In the embodiment, the airflow distribution and energy-saving device of the limestone powder making dust collector is arranged at the rear end of the flue 6 and the front end of the dust collector 7, and comprises an inlet horn 1. The first airflow distributor 2, the second airflow distributor 3 and the third airflow distributor 4 are sequentially arranged in the inlet horn 1 according to the direction of flue gas. The first airflow distributor 2, the second airflow distributor 3 and the third airflow distributor 4 are independently arranged according to the length of the inlet horn 1, can be integrally hoisted and taken out through the top assembly of the inlet horn 1, and do not need internal operation, thereby facilitating maintenance and repair.

[0025] The first airflow distributor 2 comprises first airflow distributor blades 21 and a first airflow distributor frame 22. The second airflow distributor 3 comprises second airflow distributor blades 31 and a second airflow distributor frame 32. The third airflow distributor 4 comprises third airflow distributor blades 41 and a third airflow distributor frame 42. The first airflow distributor frame 22, the second airflow distributor frame 32 and the third airflow distributor frame 42 are all square frames, one side of which is arranged in the upper part of the inlet horn 1. The middle of the frame body is provided with a blade mounting rod. The first airflow distributor blades 21 are fixedly arranged on the blade mounting rod of the first airflow distributor frame 22. The second airflow distributor blades 31 are fixedly arranged on the blade mounting rod of the second airflow distributor frame 32. The third airflow distributor blades 41 are fixedly arranged on the blade mounting rod of the third airflow distributor frame 42.

[0026] Further as Figure 1As shown, the top of the inlet horn 1 is provided with a solar photovoltaic power supply device 5, which is connected to the first airflow distributor blade 21, the second airflow distributor blade 31 and the third airflow distributor blade 41 through a circuit, and provides power for the rotation of the first airflow distributor blade 21, the second airflow distributor blade 31 and the third airflow distributor blade 41.

[0027] Further as shown Figures 2-5 The first airflow distributor blade 21 is in the form of a large blade and is made of wear-resistant material, which is used to diffuse the flue gas in a large range at the initial stage of the flue gas entering; the second airflow distributor blade 31 and the third airflow distributor blade 41 are both in the form of small blades and are made of wear-resistant material, and are uniformly laid in the second airflow distributor frame 32 and the third airflow distributor frame 42, so that the flue gas is uniformly diffused by the second airflow distributor blade 31 and the third airflow distributor blade 41 when passing through.

[0028] Further as shown Figure 2 As shown from the side (from the front side to the rear side of the inlet horn 1), the first airflow distributor blade 21, the second airflow distributor blade 31 and the third airflow distributor blade 41 are uniformly arranged and laid in the flue gas channel of the inlet horn 1, so that local short circuit of the flue gas can be avoided, and the flue gas can directly rush into the dust collector, thereby causing uneven inflow of the flue gas.

[0029] The working principle of the utility model is as follows: when the flue gas with powder in the system enters the inlet horn 1, it passes through the first airflow distributor 2, the second airflow distributor 3 and the third airflow distributor 4, respectively, and the flue gas is diffused step by step and then uniformly enters the dust collector 7. The flue gas uniform flow process is as follows: when reaching the first airflow distributor 2, part of the airflow continues to move forward, and the other part of the airflow is guided to diffuse outward by the rotating blade 21. Similarly, when the flue gas passes through the second airflow distributor 3 and the third airflow distributor 4, part of the flue gas moves forward, and the other part of the flue gas is guided to diffuse, so that the effect of uniformly entering the dust collector 7 is achieved. At this time, the solar photovoltaic power supply device 5 provides power for the blade to rotate, without wasting the kinetic energy of the airflow. When the power supply device fails to supply power, the rotation of the blade is converted into rotational friction, which can also greatly reduce the resistance of the flue gas along the path during the operation of the dust collector. The channels between the components are large, and the blades are in a rotating structure, so that the limestone powder in the flue gas cannot be agglomerated and adhered to cause blockage of the channels.

[0030] In the embodiment, when the dust-containing flue gas enters the inlet horn 1, the initial speed is basically maintained and is not diffused, and after passing through the multi-stage airflow distributor, the airflow is uniformly diffused step by step, so as to improve the dust removal efficiency of the dust collector, reduce the equipment running resistance and wear, and therefore the airflow uniformity plays a crucial role in the operation of the dust collector. In addition, the airflow distributor mainly plays a role in blade rotation, and the solar photovoltaic power supply device 5 provides power for the blade rotation, which reduces the kinetic energy loss of the airflow to a certain extent, reduces the system running resistance, and reduces the energy consumption of the fan operation, thereby achieving the energy-saving effect. In addition, each distributor is a separate component, which is taken out by integral hoisting, does not need internal operation, and is convenient for maintenance.

[0031] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas flow uniform distribution and energy saving device for a limestone pulverizing dust collector, arranged at the rear end of a flue and the front end of a dust collector, characterized in that: The inlet horn is provided with a first-stage air flow distributor, a second-stage air flow distributor and a third-stage air flow distributor in sequence in the flue gas direction; The first-stage air flow distributor comprises first-stage air flow distributor blades and a first-stage air flow distributor frame; the second-stage air flow distributor comprises second-stage air flow distributor blades and a second-stage air flow distributor frame; the third-stage air flow distributor comprises third-stage air flow distributor blades and a third-stage air flow distributor frame; the first-stage air flow distributor frame, the second-stage air flow distributor frame and the third-stage air flow distributor frame are all square frames, one side edge of which is installed above the inlet horn, a blade mounting rod is arranged in the middle of the frame body, the first-stage air flow distributor blades are fixedly installed on the blade mounting rod of the first-stage air flow distributor frame, the second-stage air flow distributor blades are fixedly installed on the blade mounting rod of the second-stage air flow distributor frame, and the third-stage air flow distributor blades are fixedly installed on the blade mounting rod of the third-stage air flow distributor frame.

2. The air flow uniformizing and energy saving device for limestone pulverizing dust collector according to claim 1, characterized in that: A solar photovoltaic power supply device is arranged on the top of the inlet horn and connected to the first-stage air flow distributor blades, the second-stage air flow distributor blades and the third-stage air flow distributor blades through a circuit.

3. The air flow uniformizing and energy saving device for limestone pulverizing dust collector according to claim 1, characterized in that: The first-stage air flow distributor blades are in the form of large blades and made of wear-resistant material, and the second-stage air flow distributor blades and the third-stage air flow distributor blades are in the form of small blades and made of wear-resistant material.

4. The air flow uniforming and energy saving device for limestone pulverizing dust collector according to claim 3, characterized in that: The first-stage air flow distributor blades, the second-stage air flow distributor blades and the third-stage air flow distributor blades are arranged in a uniform manner.

5. The air flow uniformizing and energy saving device for limestone pulverizing dust collector according to claim 1, characterized in that: The first-stage air flow distributor, the second-stage air flow distributor and the third-stage air flow distributor are arranged in the inlet horn in a uniform manner and are independent components.

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