Settling device for hot air pipeline

Abstract

The utility model relates to a settling device for a hot air pipeline, and belongs to the technical field of settling dust collection. Comprising a shell, an air inlet is formed in the front end in the shell, a first-stage striker plate is arranged at the position, on the inner side of the air inlet, of the shell, two sets of second-stage striker plates are symmetrically arranged on the two sides of the first-stage striker plate, an air outlet hopper is arranged at the upper end of the shell, a collecting hopper is arranged at the lower end of the shell, and a discharger is arranged at the lower end of the collecting hopper. The problem that hot air of an existing coal supply mill is high in dust content is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of settlement dust collection, and particularly relates to a settlement device for hot air pipeline. BACKGROUND

[0002] The hot air of the grate cooler enters the coal powder preparation system, and the main function is to dry raw coal and reduce the moisture content of raw coal, thereby effectively improving the combustion efficiency and stability of the coal powder. However, in actual use, the hot air is not purified and filtered, and there are four adverse effects. First, the hot air contains a large number of particles, which aggravates the wear of the hot air pipeline and easily causes air leakage of the hot air pipeline. Second, the particles in part of the hot air carry unburned coal powder and sparks, which enter the coal mill, a limited space, and under the condition of sufficient oxygen, easily become an open fire that triggers an explosion of the coal mill preparation system. Third, the particles in the hot air easily accumulate and deposit at the bending part and horizontal section of the hot air pipeline designed at a certain angle, causing the hot air pipeline to be not smooth. Fourth, the particles in the hot air entering the coal mill increase the ash content of the coal powder, affect the stability of the coal powder combustion, and have an adverse effect on the thermal system. SUMMARY

[0003] The utility model overcomes the defects of the prior art and provides a settlement device for hot air pipeline, solving the problem of high dust content of the hot air for the coal mill.

[0004] To achieve the above-mentioned purpose, the utility model is implemented by the following technical scheme.

[0005] A settlement device for hot air pipeline, comprising a shell, a front end of the shell is provided with an air inlet, a first material baffle is arranged on the inner side of the air inlet, two groups of second material baffles are symmetrically arranged on both sides of the first material baffle, an air outlet is arranged on the upper end of the shell, a material collecting hopper is arranged on the lower end of the shell, and a material unloader is arranged on the lower end of the material collecting hopper.

[0006] Further, the shell is a square box structure with open upper and lower ends, the air inlet is arranged at the center of the front side wall of the shell, and the air inlet is in a circular structure.

[0007] Further, the first material baffle is in a semicircular arc plate structure, the first material baffle is arranged above the inner side of the air inlet, and the front and rear ends of the first material baffle are fixedly connected with the inner walls of the front and rear sides of the shell.

[0008] Further, each group includes a plurality of second material baffles, the plurality of second material baffles are arranged equidistantly along the left-right direction, the front and rear ends of the second material baffles are fixedly connected with the inner walls of the front and rear sides of the shell, and the height of the side edge of the second material baffle close to the first material baffle is lower than the height of the side edge of the second material baffle away from the first material baffle.

[0009] Further, the air outlet is fixedly arranged at the square opening of the upper end of the shell, the air outlet is a hemisphere structure with upper and lower openings, the upper end of the air outlet is a circular opening, the lower end of the air outlet is a square opening, and the square opening of the lower end of the air outlet is fixedly connected with the square opening of the upper end of the shell.

[0010] Further, two symmetrical material collecting hoppers are fixedly arranged at the square openings of the lower end of the shell, the material collecting hoppers are square table-shaped cylindrical structures with upper and lower openings, the upper and lower openings of the material collecting hoppers are square openings, and the square opening of the lower end of the material collecting hoppers is smaller than the square opening of the upper end of the material collecting hoppers.

[0011] Further, the two groups of secondary material blocking plates are arranged above the square openings of the upper ends of the two material collecting hoppers.

[0012] Further, one of the material dischargers is fixedly arranged at the square opening of the lower end of each material collecting hopper.

[0013] Further, the maintenance doors are arranged on the left and right side walls of the shell, and the height of the maintenance doors is higher than the height of the secondary material blocking plates.

[0014] The beneficial effects of the present application relative to the prior art are as follows:

[0015] The present application provides a kind of for hot air pipeline's sedimentation device, by three arrangements of primary material blocking plate, secondary material blocking plate, air outlet, most of the particulate in the hot air to be entered into coal mill, intercept, reach the effect of purifying hot air.Secondary material blocking plate is only easy-to-damage part, and it is convenient, simple, safe, more fast, simplifies process, to reach the purpose of being convenient for maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described in detail below with reference to the drawings:

[0017] Figure 1 It is the overall three-dimensional schematic diagram of the present application;

[0018] Figure 2 It is the internal mechanism schematic diagram of the present application;

[0019] Figure 3 It is the working schematic diagram of the present application;

[0020] Wherein, 1 is the shell, 2 is the air inlet, 3 is the first baffle, 4 is the second baffle, 5 is the air outlet, 6 is the collecting hopper, 7 is the unloader, 8 is the air outlet, 9 is the access door, 10 is the grate cooler, 11 is the settling device, 12 is the coal mill, 13 is the coal mill dust collector, 14 is the coal mill dust collector exhaust fan. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved more clear and obvious, the utility model is further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model and not used to limit the utility model. The technical solutions of the utility model are described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.

[0022] As shown in Figure 1 The utility model provides a kind of settling device for hot air pipeline, including shell 1, air inlet 2 is provided in the front end in shell 1, shell 1 is provided with first baffle 3 in the inboard of air inlet 2, two groups of second baffle 4 are symmetrically provided in the both sides of first baffle 3, air outlet 8 is provided on the upper end of shell 1, collecting hopper 6 is provided on the lower end of shell 1, and unloader 7 is provided on the lower end of collecting hopper 6.

[0023] The shell 1 is the square box structure that keeps open in upper and lower ends, the air inlet 2 is arranged at the center of the front side wall of the shell 1, and the air inlet 2 is a circular structure.

[0024] The first baffle 3 is a semicircular arc plate structure, and the first baffle 3 is arranged above the inboard of the air inlet 2. The front and rear ends of the first baffle 3 are fixedly connected to the inner walls of the front and rear sides of the shell 1, respectively. Each group includes multiple second baffles 4, and the multiple second baffles 4 are arranged equidistantly along the left-right direction. The front and rear ends of the second baffles 4 are fixedly connected to the inner walls of the front and rear sides of the shell 1, respectively. The height of the side edge of the second baffle 4 close to the first baffle 3 is lower than the height of the side edge of the second baffle 4 away from the first baffle 3.

[0025] The size and number of the second baffle 4 are set according to the size of the shell 1, and the angle is controlled to be 40°-50°. If the angle is too large, the pressure of the air outlet 5 is easily reduced, which causes the hot air pressure of the coal mill 12 to be insufficient. In order to maintain sufficient hot air, the speed of the coal mill dust collector exhaust fan 14 needs to be increased. In this way, the particles in the hot air are more easily carried up and are not easily collected. If the angle is too small, the particles falling into the collecting hopper 6 are easily carried up again by the negative pressure of the air outlet 5, collide, fall down again, are carried up again, and form a vicious cycle. The second baffle 4 functions to block the particles falling into the collecting hopper 6 from being carried up again by the negative pressure of the air outlet 5.

[0026] The air outlet 8 is fixedly arranged at the square opening at the upper end of the shell 1, and the air outlet 8 is a hemispherical square structure with openings at the upper and lower ends, the upper end opening of the air outlet 8 is a circular opening, the lower end opening of the air outlet 8 is a square opening, and the square opening at the lower end of the air outlet 8 is fixedly connected with the square opening at the upper end of the shell 1. The size of the upper end opening of the air outlet 8 is smaller than the size of the lower end opening of the air outlet 8, and the particles in the hot air collide with the inner wall of the air outlet 8 and fall down by gravity, pass through the secondary baffle 4 and fall into the collecting hopper 6. The upper end opening of the air outlet 8 is provided with the air outlet 5.

[0027] The inner walls of the primary baffle 3, the shell 1, the air outlet 8 and the collecting hopper 6 are welded with stainless steel tortoise shell nets, and the stainless steel tortoise shell nets are poured with wear-resistant materials. The tortoise shell net is a hexagonal three-dimensional net made of special metal materials with high temperature resistance and corrosion resistance, and is assembled by professional equipment. The six sides are all provided with holes and are easy to bend. After being welded on the inner walls of the primary baffle 3, the shell 1, the air outlet 8 and the collecting hopper 6, the tortoise shell net is poured with refractory aggregate to increase the anchoring capacity, and the service life can be increased by several times. Moreover, the refractory material will not peel off, and the service life is long. At the same time, it also plays a heat preservation role. In addition, the shell 1 is subjected to overall heat preservation treatment.

[0028] Two symmetrical collecting hoppers 6 are fixedly arranged at the square opening at the lower end of the shell 1, and the collecting hopper 6 is a square table-shaped cylindrical structure with openings at the upper and lower ends. The upper and lower end openings of the collecting hopper 6 are both square openings, and the size of the square opening at the lower end of the collecting hopper 6 is smaller than the size of the square opening at the upper end of the collecting hopper 6. The square opening at the upper end of the collecting hopper 6 is fixedly connected with the square opening at the lower end of the shell 1.

[0029] The collecting hopper 6 is designed to be wide at the upper end and narrow at the lower end, so that the material is easy to collect and quickly falls into the grate cooler 10 through the discharger 7. At the same time, after the particles fall into the collecting hopper 6, the material is quickly accumulated, and the taper part can play a certain wind locking role.

[0030] The two groups of secondary baffles 4 are respectively located above the square openings at the upper ends of the two collecting hoppers 6.

[0031] One of the dischargers 7 is fixedly arranged at the square opening at the lower end of each collecting hopper 6. The discharger 7 has two functions: one is to unload, and the other is to lock the wind. The discharger 7 is made of wear-resistant and high-temperature-resistant materials.

[0032] The maintenance doors 9 are arranged on the left and right side walls of the shell 1, and the height of the maintenance door 9 is higher than the height of the secondary baffle 4.

[0033] The working principle of the utility model is as follows:

[0034] During the preparation of the coal powder, according to the actual hot air demand, the electric butterfly valve of the hot air pipeline is opened in a certain proportion, so that the high-temperature hot material in the rotary kiln falls into the grate cooler 10, the cooling air of the grate cooler 10 exchanges heat with the material, the generated hot air enters the inside of the settling device 11 provided by the utility model under the action of the coal mill dust collection exhaust fan 14, the filtered hot air enters the coal mill 12 along the pipeline, fully mixes with the raw coal in the coal mill 12, exchanges heat, dries the moisture of the raw coal, and the raw coal is generated into coal powder under the action of the coal mill 12, the waste gas enters the coal mill dust collection 13 for filtration, and the purified hot air is discharged into the atmosphere through the coal mill dust collection exhaust fan 14. As the main fuel in cement production, the coal powder reduces the adverse effects of particulate matters in the hot air on the coal powder, and actively promotes the stability of the thermal system.

[0035] When the hot air containing particulate matters of the grate cooler 10 enters the inside of the shell 1 through the air inlet 2, most of them are blocked by the first material blocking plate 3, so that the movement track of the hot air is changed, and the particulate matters in the hot air collide on the first material blocking plate 3 and fall into the collecting hopper 6 under the action of gravity and then fall into the grate cooler 10 through the unloader 7.

[0036] A small part of the hot air containing particulate matters continues to rise and is blocked by the upward-narrow and downward-wide air outlet 8, so that the movement direction is changed, the particulate matters in the hot air collide on the inner wall of the air outlet 8 and start to fall under the action of gravity, collide with the particulate matters in the rising hot air in the falling process, and fall into the collecting hopper 6 at the same time.

[0037] The particulate matters falling into the upward-wide and downward-narrow collecting hopper 6 are quickly collected, most of them fall into the grate cooler 10 through the unloader 7, and a small part of the smaller particulate matters start to rise under the action of negative pressure, are blocked by the second material blocking plate 4 installed on both sides of the first material blocking plate 3, collide with the falling particulate matters, or collide with the inner wall of the air outlet 8 and the air outlet 5, and then fall into the collecting hopper 6 through the unloader 7 and fall into the grate cooler 10.

[0038] The second material blocking plate 4 in the shell 1 is a consumable part, when the machine is stopped, the seriously worn second material blocking plate 4 can be checked and replaced through the inspection door 9 on the side of the shell 1.

[0039] It should be noted that the efficiency of the settling dust collection is related to the airflow speed, the inlet speed, the particulate matter concentration, the length of the settling chamber and the like, the settling dust collection efficiency is relatively low, only 30-40%, the utility model can make the settling dust collection efficiency of the utility model reach 60-65% through the transformation of the air inlet 2, the air outlet 5 and the second material blocking plate 4, can effectively block the particulate matters in the hot air, and especially effectively reduce the coal usage in cement production by 0.5-0.6%.

[0040] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A settling device for hot air ducts, characterized in that: Includes a shell (1), an air inlet (2) is provided at the front end of the shell (1), a first-level baffle (3) is provided inside the air inlet (2) of the shell (1), two sets of second-level baffles (4) are symmetrically provided on both sides of the first-level baffle (3), an air outlet hopper (8) is provided at the upper end of the shell (1), a material collection hopper (6) is provided at the lower end of the shell (1), and a discharger (7) is provided at the lower end of the material collection hopper (6).

2. A settling device for hot air ducts according to claim 1, characterized in that: The housing (1) is a square box structure with open upper and lower ends. The air inlet (2) is located at the center of the front side wall of the housing (1) and has a circular structure.

3. A settling device for hot air ducts according to claim 2, characterized in that: The first-level baffle (3) is a semi-circular plate structure. The first-level baffle (3) is located above the inner side of the air inlet (2). The front and rear ends of the first-level baffle (3) are fixedly connected to the inner walls of the front and rear sides of the shell (1).

4. A settling device for hot air ducts according to claim 3, characterized in that: Each group includes multiple secondary baffles (4). The multiple secondary baffles (4) are arranged at equal intervals along the left and right directions. The front and rear ends of the secondary baffles (4) are fixedly connected to the inner walls of the front and rear sides of the shell (1). The height of the edge of the secondary baffle (4) near the primary baffle (3) is lower than the height of the edge of the secondary baffle (4) away from the primary baffle (3).

5. A settling device for hot air ducts according to claim 2, characterized in that: An air outlet (8) is fixedly installed at the square opening at the upper end of the housing (1). The air outlet (8) is a square structure with openings at both the upper and lower ends. The upper opening of the air outlet (8) is a circular opening, and the lower opening of the air outlet (8) is a square opening. The square opening at the lower end of the air outlet (8) is fixedly connected to the square opening at the upper end of the housing (1). The size of the upper opening of the air outlet (8) is smaller than the size of the lower opening of the air outlet (8). An air outlet (5) is provided at the upper opening of the air outlet (8).

6. A settling device for hot air ducts according to claim 2, characterized in that: Two symmetrical collection hoppers (6) are fixedly installed at the square opening at the lower end of the shell (1). The collection hopper (6) is a square platform-shaped cylindrical structure with openings at both the upper and lower ends. Both the upper and lower ends of the collection hopper (6) are square openings. The size of the square opening at the lower end of the collection hopper (6) is smaller than the size of the square opening at the upper end of the collection hopper (6). The square opening at the upper end of the collection hopper (6) is fixedly connected to the square opening at the lower end of the shell (1).

7. A settling device for hot air ducts according to claim 6, characterized in that: Two sets of secondary baffles (4) are located above the square openings at the top of the two collection hoppers (6).

8. A settling device for hot air ducts according to claim 6, characterized in that: A discharger (7) is fixedly installed at the square opening at the lower end of each hopper (6).

9. A settling device for hot air ducts according to claim 2, characterized in that: Inspection doors (9) are provided on the left and right side walls of the housing (1), and the height of the inspection doors (9) is higher than the height of the secondary baffle (4).

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