Straw raw material impurity screening equipment

Abstract

The utility model discloses straw raw material impurity screening equipment which comprises a machine box, a screening box is arranged in the machine box, the bottom wall of the screening box is inclined, a feeding hopper is arranged on the higher side of the screening box, a discharging opening is formed in the lower side of the screening box, and a vibrating mechanism is arranged on the screening box. A plurality of screening parts are arranged on the bottom wall of the screening box, a plurality of screening openings are formed in the screening parts, a receiving hopper is arranged below the screening parts, the lower end of the receiving hopper is slidably connected with a winnowing box, an air inlet is formed in one side of the winnowing box, a fan is arranged on one side of the winnowing box, two collecting openings are formed in the lower end of the winnowing box, and a partition plate is correspondingly arranged between the collecting openings. The straw screening device is reasonable in design and compact in structure, the screening quality of impurities in straw is guaranteed, the processing quality of biomass fuel is guaranteed, and follow-up processing is facilitated through classified collection of screened materials.

Description

TECHNICAL FIELD

[0001] The utility model relates to straw processing technical field especially relates to a straw raw material impurity screening equipment. BACKGROUND

[0002] At present, the application of straw in the energy field has multiple direction researches, such as straw power generation, straw gas making, straw liquefaction etc., and there are also many reports on the application of using straw instead of coal and natural gas for industrial production, but the heat value of straw is about half of standard coal, and it also contains more plant fiber and other impurities, and the bulk density is too low, so it will occupy a large space in the fuel bin, therefore, the current way of processing straw into biomass particles or biomass blocks is adopted to improve the combustion performance of biomass fuel, and it is also convenient for storage and transportation.

[0003] In order to ensure the production quality of biomass fuel, the stones and other impurities mixed in the straw need to be screened out before the straw raw material is processed, so as to ensure the processing effect of biomass fuel, and at present, the screening of impurities is not sufficient, and the screened materials are not easy to be classified and collected, which is not convenient for subsequent processing. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of straw raw material impurity screening equipment to solve the shortcomings that impurities in biomass fuel are not easy to screen out in prior art, and various materials are not easy to be classified and collected after raw material screening, and subsequent processing is inconvenient.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of straw raw material impurity screening equipment, including machine case, screening box is arranged in machine case, the bottom wall of screening box is inclined, higher side is equipped with feed hopper, lower side is equipped with discharge port, vibration mechanism is equipped on screening box;

[0007] Multiple screening parts are equipped on the bottom wall of screening box, multiple screening openings are opened in screening part, receiving hopper is arranged below screening part, air separation box is slidably connected to the lower end of receiving hopper, air inlet is arranged on one side of air separation box and fan is arranged, two collection ports are arranged on the lower end of air separation box, and partition is arranged between the two collection ports.

[0008] Preferably, the size of the screening opening of the screening part near the feed hopper side is smaller, and the size of the screening opening away from the feed hopper side gradually increases.

[0009] Preferably, the bottom wall of the screening box is provided with a slow-release tooth perpendicular to the sliding direction of the material.

[0010] Preferably, the side of the air separation box away from the fan is provided with a breathable net.

[0011] Preferably, the baffle plate corresponds to the screening part, one of the collecting ports corresponds to the screening opening, and the fan is arranged on one side close to the feeding hopper.

[0012] Preferably, the vibration mechanism comprises a vibration motor mounted on the screening box and a plurality of elastic buffers vertically arranged on both sides of the screening box, wherein the other end of the elastic buffer is fixedly connected to the inner wall of the cabinet, and the elastic buffer provides buffering and limiting for the screening box.

[0013] More preferably, the elastic buffer comprises a sliding sleeve fixedly mounted on the side wall of the screening box, a sliding column slidingly connected in the sliding sleeve, and a buffer spring arranged between the sliding sleeve and the sliding column, wherein the lower end of the sliding column is fixedly mounted on the mounting plate horizontally extending in the inner wall of the cabinet.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. In the utility model, the impurities and smaller materials are screened out by the screening box, and the impurities such as stones and straw fragments are screened and sent out respectively through secondary air selection, so that the impurity screening effect is ensured, subsequent processing is facilitated, and processing efficiency is ensured.

[0016] 2. In the utility model, different sizes of impurities are sequentially screened through the cooperation of the plurality of screening parts and the air selection box, so that the air selection effect of the impurities is ensured, and the screening quality is ensured.

[0017] The utility model has the advantages of reasonable design, compact structure, ensured screening quality of impurities in straw, ensured processing quality of biomass fuel, and facilitated subsequent processing through classified collection of screened materials. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an appearance structure schematic view of the utility model.

[0019] Figure 2 It is an internal structure schematic view of the utility model.

[0020] Figure 3 It is an internal structure schematic view of the screening box of the utility model.

[0021] Figure 4 It is a front structure sectional view of the utility model.

[0022] Figure 5 It is a side structure sectional view of the utility model.

[0023] In the figure: cabinet 1, screening box 2, feed hopper 21, elastic buffer 22, sliding sleeve 221, buffer spring 222, sliding column 223, screening part 23, receiving hopper 231, slow descent tooth 24, discharge port 25, vibration motor 3, air separation box 4, air inlet 41, air permeable net 42, partition 43, collection port 44, fan 5. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0025] Referring to Figures 1-5 A straw raw material impurity screening device, comprising a cabinet 1, a screening box 2 is arranged in the cabinet 1, the bottom wall of the screening box 2 is inclined, a feed hopper 21 is arranged on the higher side, and a discharge port 25 is arranged on the lower side, which are respectively used for feeding of straw raw material and discharging after screening is completed. A vibration mechanism is arranged on the screening box 2; the stones and other impurities in the straw raw material are vibrated and fallen off through the vibration mechanism, which facilitates screening of the impurities.

[0026] A plurality of screening parts 23 are arranged on the bottom wall of the screening box 2, the screening parts 23 are provided with a plurality of screening openings, a receiving hopper 231 is arranged below the screening parts 23, an air separation box 4 is slidably connected to the lower end of the receiving hopper 231, an air inlet 41 is arranged on one side of the air separation box 4 and a fan 5 is arranged on the air inlet 41, two collection ports 44 are arranged at the lower end of the air separation box 4 and a partition 43 is arranged between the collection ports 44. The impurities falling down through the screening openings are screened out, the impurities fall into the air separation box 4 through the receiving hopper 231, an airflow is blown out through the fan 5, the straw fragments and stones in the falling material are screened through the airflow, the stones with a larger density vertically fall into the corresponding collection ports 44, the straw fragments with a lighter weight and a larger contact area with the airflow move with the airflow and fall into another collection port 44 in a parabolic manner, which ensures the screening effect of the straw fragments and the stones and other impurities and ensures the processing quality of the biomass fuel, and facilitates subsequent processing of the screened straw fragments.

[0027] Based on the above technical solution, when the device is used for screening impurities in straw, the straw is sent into the screening box 2 through the feed hopper 21, the screening box 2 is vibrated through the vibration mechanism, the impurities and straw fragments falling down are screened out and fall into the receiving hopper 231 through the screening parts 23, the impurities and straw fragments are screened through the airflow in the air separation box 4, the two collection ports 44 are respectively used for sending out for subsequent processing, the straw with screened impurities is sent out through the discharge port 25, the screening of impurities in the straw raw material is completed, the screening effect is ensured, the impurities and straw fragments are screened through air separation, and subsequent processing is facilitated.

[0028] In the technical solution,Figures 1-5 As shown in the drawings, the screening opening size of the screening part 23 close to the feeding hopper 21 side is smaller, and the screening opening size far from the feeding hopper 21 side gradually expands. It is convenient to screen different sizes of impurities, and the screening is in order from small to large. It is convenient to adjust the air supply amount of the fan 5 for different sizes of impurities, to ensure the screening effect of impurities and straw fragments, and to facilitate subsequent processing of different materials screened out, to ensure the processing quality of biomass fuel.

[0029] In the technical solution, as shown in the drawings, Figures 1-5 As shown in the drawings, the bottom wall of the screening box 2 is provided with a slow descending tooth 24 perpendicular to the sliding direction of the material. The slow descending tooth 24 delays the sliding of the straw, ensures that the impurities in the straw can be fully vibrated and screened out, and ensures the production quality of the biomass fuel.

[0030] In the technical solution, as shown in the drawings, Figures 1-5 As shown in the drawings, the air separation box 4 is provided with a breathable net 42 far from the fan 5. It is ensured that the airflow sent out by the fan 5 can flow horizontally and pass through the breathable net 42, to ensure the stable flow of the airflow and the screening effect of the material.

[0031] In the technical solution, as shown in the drawings, Figures 1-5 As shown in the drawings, the partition plate 43 is provided corresponding to the screening part 23, so that one of the collection openings 44 corresponds to the screening opening, and the fan 5 is arranged close to the feeding hopper 21 side. Larger impurities directly fall into the collection opening 44 located directly below the screening opening, and lighter straw fragments are blown to the collection opening 44 on the other side to be sent out, to ensure the screening effect of the material.

[0032] In the technical solution, as shown in the drawings, Figures 1-5 As shown in the drawings, the vibration mechanism includes a vibration motor 3 mounted on the screening box 2 and a plurality of elastic buffers 22 vertically arranged on both sides of the screening box 2, wherein the other end of the elastic buffer 22 is fixedly connected to the inner wall of the machine box 1, for providing buffering and limiting for the screening box 2. The elastic buffer 22 includes a sliding sleeve 221 fixedly installed on the side wall of the screening box 2, a sliding column 223 slidably connected in the sliding sleeve 221, and a buffer spring 222 arranged between the two, wherein the lower end of the sliding column 223 is fixedly installed on the mounting plate horizontally extending in the inner wall of the machine box 1. The vibration motor 3 drives the screening box 2 to vibrate, and at the same time cooperates with the elastic buffer 22 to limit the vibration of the screening box 2, to ensure the stable vibration of the screening box 2.

[0033] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A straw raw material impurity screening device, comprising a chassis (1), a screening box (2) provided in the chassis (1), characterized in that: The bottom wall of the screening box (2) is inclined, a feed hopper (21) is provided on the higher side, and a discharge port (25) is provided on the lower side, and a vibration mechanism is provided on the screening box (2); The bottom wall of the screening box (2) is provided with a plurality of screening parts (23), the screening parts (23) are provided with a plurality of screening openings, a receiving hopper (231) is provided below the screening part (23), the lower end of the receiving hopper (231) is slidably connected to a wind separation box (4), one side of the wind separation box (4) is provided with an air inlet (41) and a fan (5), and the lower end of the wind separation box (4) is provided with two collecting ports (44), and a partition (43) is correspondingly provided between the collecting ports (44).

2. The straw raw material impurity screening device according to claim 1, characterized in that: The screening opening size of the screening portion (23) on the side close to the feed hopper (21) is smaller, and the screening opening size on the side away from the feed hopper (21) gradually increases.

3. The straw raw material impurity screening device according to claim 2, characterized in that: The bottom wall of the screening box (2) is provided with slow-down teeth (24) perpendicular to the sliding direction of the material.

4. The straw raw material impurity screening device according to claim 1, characterized in that: A ventilation net (42) is provided on the side of the air separation box (4) away from the fan (5).

5. The straw raw material impurity screening device according to claim 1, characterized in that: The partition (43) is arranged corresponding to the screening portion (23), so that one of the collecting ports (44) corresponds to the screening opening, and the fan (5) is arranged on a side close to the feed hopper (21).

6. The straw raw material impurity screening device according to claim 1, characterized in that: The vibration mechanism comprises a vibration motor (3) mounted on a screening box (2) and a plurality of elastic buffer members (22) vertically arranged on both sides of the screening box (2), wherein the other end of the elastic buffer member (22) is fixedly connected to the inner wall of the chassis (1) for providing buffering and limiting for the screening box (2).

7. The straw raw material impurity screening device according to claim 6, characterized in that: The elastic buffer member (22) comprises a sliding sleeve (221) fixedly mounted on the side wall of the screening box (2), a sliding post (223) slidably connected in the sliding sleeve (221), and a buffer spring (222) arranged therebetween, wherein the lower end of the sliding post (223) is fixedly mounted on a mounting plate extending horizontally in the inner wall of the chassis (1).

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