Screening and collecting device for limestone powder

Abstract

The utility model relates to the technical field of limestone powdering, in particular to a limestone powder screening and collecting device which comprises a steel support and a raw material processing device, the raw material processing device is fixed at the top of the steel support, a discharge port of the raw material processing device is communicated with an inlet of an ash hopper, and an outlet of the ash hopper is communicated with a powder bin. The ash bucket comprises a fine powder ash bucket and a coarse powder ash bucket, the fine powder ash bucket is arranged below the discharge port, the coarse powder ash bucket and the fine powder ash bucket are arranged in parallel, one end of the screen is fixed with the fine powder ash bucket, and the other end of the screen extends into the coarse powder ash bucket and is fixed in a downward inclined manner; an outlet of the fine powder ash hopper is communicated with the fine powder bin, an outlet of the coarse powder ash hopper is communicated with the coarse powder bin, the raw material treatment device comprises a shell, a filter bag device and an air purification chamber, the filter bag device and the air purification chamber are arranged in the shell, the air purification chamber is fixed to the top of the filter bag device, an integrated treatment and classification system is used, coarse powder and fine powder are prepared at the same time, and the raw material treatment device is simple in structure and convenient to operate. Equipment and investment are not additionally increased.

Description

Technical Field

[0001] The utility model relates to the technical field of limestone powder making, in particular to a screening and collecting device for limestone powder. Background Art

[0002] The circulating fluidized bed boiler desulfurization system can adopt in-furnace desulfurization and out-furnace desulfurization. In-furnace desulfurization adopts in-furnace calcium injection, and the desulfurizer is coarse limestone powder. The limestone particle size is required to be less than 1mm, and the proportion of particles with a size of less than 45μm is less than 10%. The most common method of out-furnace desulfurization is limestone-gypsum wet flue gas desulfurization, and its absorbent is fine limestone powder. The limestone particle size is required to be less than 325 mesh, and the 325 mesh sieve residue is less than 10%.

[0003] The Chinese utility model patent with publication number CN212550499U, published on February 19, 2021, discloses a powder grading and collection device, including an induced draft fan and a multi-stage powder system, the air inlet of the induced draft fan is connected to the multi-stage powder system, the multi-stage powder system includes a bag collecting bin, a cyclone collector and an air flow classifier, the inlet of the bag collecting bin is connected to the outlet of the cyclone collector, the inlet of the cyclone collector is connected to the outlet of the air flow classifier, two collection ports are provided at the bottom of the bag collecting bin, and an air inlet is provided at the bottom of the cyclone collector and the air flow classifier.

[0004] In the above patent, two collecting ports are arranged on the bag collecting bin to further classify the fine powder, thereby improving the accuracy and quality of the powder. However, the equipment is relatively large, which increases the workload of operation, overhaul and maintenance, and the area occupied is large and the construction cost is high. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a screening and collecting device for limestone powder, which uses an integrated processing and classification system to prepare coarse powder and fine powder at the same time without adding additional equipment and investment.

[0006] The utility model provides the following technical solutions:

[0007] A screening and collecting device for limestone powder comprises a steel support and a raw material processing device, wherein the raw material processing device is fixed on the top of the steel support, the discharge port of the raw material processing device is connected with the inlet of an ash hopper, the outlet of the ash hopper is connected with a powder bin, the ash hopper comprises a fine powder ash hopper and a coarse powder ash hopper, the fine powder ash hopper is arranged below the discharge port, the coarse powder ash hopper and the fine powder ash hopper are arranged in parallel, one end of the screen is fixed with the fine powder ash hopper, the other end of the screen extends to the inside of the coarse powder ash hopper and is fixed downwardly; the outlet of the fine powder ash hopper is connected with the fine powder bin, and the outlet of the coarse powder ash hopper is connected with the coarse powder bin.

[0008] Furthermore, the raw material processing device includes a shell, a filter bag device and a clean air chamber, the filter bag device and the clean air chamber are arranged inside the shell, and the clean air chamber is fixed to the top of the filter bag device; the feed inlet is arranged at the bottom of the filter bag device, and the clean air chamber is provided with a smoke outlet.

[0009] Furthermore, a spring device is fixed between the raw material processing device and the steel support.

[0010] Furthermore, an expansion joint is fixed between the raw material processing device and the fine powder hopper.

[0011] Furthermore, a vibration motor is fixed at the bottom of the screen.

[0012] Further, the screen is inclined downward at an angle of one degree.

[0013] Furthermore, the sieve is a 325 mesh sieve.

[0014] The utility model has the following beneficial technical effects:

[0015] 1. The utility model uses an integrated processing and classification system to prepare coarse powder and fine powder at the same time without adding additional equipment and investment.

[0016] 2. The utility model only needs to select powder once, without complicated multiple selections and cyclic grinding. The overall structure of the device is simple and occupies a small area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a top view of the utility model;

[0019] Figure 3 It is a side view of the utility model.

[0020] The reference numerals in the figure are as follows:

[0021] 1. Steel support; 21. Shell; 22. Filter bag device; 23. Clean air chamber; 24. Feed inlet; 25. Smoke outlet; 26. Discharge outlet; 3. Spring device; 4. Screen; 5. Vibration motor; 6. Fine powder hopper; 7. Fine powder bin; 8. Coarse powder hopper; 9. Coarse powder bin. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1-Figure 3 As shown, the screening and collecting device for limestone powder of this embodiment includes a steel support 1 and a raw material processing device, the raw material processing device is fixed on the top of the steel support 1, the discharge port 26 of the raw material processing device is connected with the ash hopper inlet, the ash hopper outlet is connected with the powder bin, the ash hopper includes a fine powder ash hopper 6 and a coarse powder ash hopper 8, the fine powder ash hopper 6 is arranged below the discharge port 26, the coarse powder ash hopper 8 is arranged in parallel with the fine powder ash hopper 6, one end of the screen 4 is fixed to the fine powder ash hopper 6, and the other end of the screen 4 extends to the inside of the coarse powder ash hopper 8 and is fixed downwardly; the outlet of the fine powder ash hopper 6 is connected with the fine powder bin 7, and the outlet of the coarse powder ash hopper 8 is connected with the coarse powder bin 9.

[0025] The utility model uses an integrated processing and classification system to prepare coarse powder and fine powder at the same time without adding additional equipment and investment. The limestone powder collected by the raw material processing device is screened by the screen 4 in the fine powder hopper 6, and the smaller powder enters the fine powder bin 7, and the larger powder flows into the coarse powder hopper 8 through the inclined screen 4.

[0026] Furthermore, the raw material processing device includes a shell 21, a filter bag device 22 and a clean air chamber 23. The filter bag device 22 and the clean air chamber 23 are arranged inside the shell 21, and the clean air chamber 23 is fixed to the top of the filter bag device 22; the feed port 24 is arranged at the bottom of the filter bag device 22, and the clean air chamber 23 is provided with a smoke outlet 25.

[0027] The limestone raw material enters the shell 21 through the feed port 24, is processed by the filter bag device 22, and the processed powder enters the fine powder hopper 6 through the discharge port 26; the smoke generated during the processing enters the clean air chamber 23 upward, and the smoke is discharged into the air after being processed in the clean air chamber 23.

[0028] Furthermore, a spring device 3 is fixed between the raw material processing device and the steel support 1 .

[0029] Furthermore, an expansion joint is fixed between the raw material processing device and the fine powder hopper 6 .

[0030] The expansion joint can effectively absorb vibration, prevent the vibration of the fine powder hopper 6 from causing vibration of the housing 21, and ensure the normal operation of the filter bag device 22 in the housing 21.

[0031] Furthermore, a vibration motor 5 is fixed at the bottom of the screen 4 .

[0032] The vibration motor 5 is a variable frequency motor, and the vibration frequency of the vibration motor 5 can be adjusted according to the amount of limestone powder.

[0033] Furthermore, the screen 4 is inclined downward at an angle of one degree.

[0034] Furthermore, the screen 4 is a 325-mesh screen.

[0035] The method of using the utility model is:

[0036] The limestone powder collected by the filter bag device 22 enters the fine powder hopper 6. Under the action of the vibration motor 5, the powder is screened on the surface of the screen 4 in the fine powder hopper 6, and the powder less than 325 mesh enters the bottom of the fine powder hopper 6, and the powder greater than 325 mesh flows into the coarse powder hopper 8 through the inclined screen 4, and finally flows into the coarse powder bin 9. The vibration motor 5 is a variable frequency motor, and the vibration frequency of the vibration motor 5 can be adjusted according to the amount of limestone powder.

[0037] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A screening and collecting device for limestone powder, comprising a steel support (1) and a raw material processing device, wherein the raw material processing device is fixed to the top of the steel support (1), the discharge port (26) of the raw material processing device is connected to the inlet of the ash hopper, and the outlet of the ash hopper is connected to the powder bin, characterized in that: The ash hopper comprises a fine powder ash hopper (6) and a coarse powder ash hopper (8); the fine powder ash hopper (6) is arranged below the discharge port (26); the coarse powder ash hopper (8) and the fine powder ash hopper (6) are arranged in parallel; one end of the screen (4) is fixed to the fine powder ash hopper (6); the other end of the screen (4) extends into the inside of the coarse powder ash hopper (8) and is fixed downwardly; the outlet of the fine powder ash hopper (6) is connected to the fine powder bin (7); the outlet of the coarse powder ash hopper (8) is connected to the coarse powder bin (9).

2. A screening and collecting device for limestone powder according to claim 1, characterized in that: The raw material processing device comprises a housing (21), a filter bag device (22) and a clean air chamber (23); the filter bag device (22) and the clean air chamber (23) are arranged inside the housing (21); the clean air chamber (23) is fixed to the top of the filter bag device (22); a feed inlet (24) is arranged at the bottom of the filter bag device (22); and the clean air chamber (23) is provided with a smoke outlet (25).

3. A screening and collecting device for limestone powder according to claim 1, characterized in that: A spring device (3) is fixed between the raw material processing device and the steel support (1).

4. A screening and collecting device for limestone powder according to claim 1, characterized in that: An expansion joint is fixed between the raw material processing device and the fine powder ash hopper (6).

5. A screening and collecting device for limestone powder according to claim 1, characterized in that: A vibration motor (5) is fixed at the bottom of the screen (4).

6. A screening and collecting device for limestone powder according to claim 1, characterized in that: The downward inclination angle of the screen (4) is one degree.

7. A screening and collecting device for limestone powder according to claim 1, characterized in that: The sieve (4) is a 325 mesh sieve.

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