Low-calorific-value pebble coal recycling system

Abstract

The utility model relates to a recycling system for pebble coal with a low heating value. The recycling system comprises a crushing bin and a crushing mechanism arranged in the crushing bin, the winnowing bin is communicated with the crushing bin, the winnowing bin is provided with a slag discharging opening, a discharging opening and an air inlet, the discharging opening is communicated with the air inlet end of a coal mill, and primary air enters the air inlet; and the slag discharging assembly is connected to the slag discharging opening, slag enters the exterior of the slag discharging opening through the slag discharging assembly, and the slag discharging opening is kept closed through the slag discharging assembly. According to the utility model, the crushing mechanism is matched with the winnowing bin, so that pebble coal discharged in the coal grinding process is ground and sorted, pulverized coal can return to the coal grinding machine again to be utilized, mineral powder is directly discharged, and the effect of further extracting coal resources in the pebble coal is achieved; therefore, waste of coal resources can be reduced, and the energy utilization effect of the whole system can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pebble coal processing equipment, in particular to a low calorific value pebble coal recovery and utilization system. Background Art

[0002] In the coal pulverizing system of a power plant, the pebble coal that is not completely ground will be discharged from the coal pulverizer. The pebble coal contains certain mineral components, which leads to its generally low calorific value. In the current technology, the pebble coal discharged from the coal pulverizer is generally not recycled for a second time, but is usually used for further processing and utilization in other aspects, such as making bricks or masonry, etc. However, this treatment method cannot further utilize the remaining coal resources in the pebble coal, which can easily cause a waste of energy. For this reason, the inventor believes that it is necessary to provide a system that can recycle the low calorific value pebble coal, so as to further extract and utilize the coal resources contained in the pebble coal to reduce energy waste. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] In view of the following technical problems in the prior art: the current technology lacks a device that can further extract the coal resources contained in the stone coal, resulting in a certain waste of coal resources in the entire coal grinding system. In order to solve this technical problem, the utility model provides the following technical solutions:

[0005] A low calorific value pebble coal recycling system, comprising:

[0006] A crushing bin and a crushing mechanism disposed in the crushing bin, wherein the crushing bin is connected to a discharge end of a coal mill;

[0007] A wind separation bin connected to the crushing bin, the wind separation bin having a slag discharge port, a material discharge port and an air inlet, the material discharge port is connected to the air inlet end of the coal mill, and primary air enters the air inlet;

[0008] A slag discharge component is connected to the slag discharge port, and the slag enters the outside of the slag discharge port through the slag discharge component, and the slag discharge port is kept closed by the slag discharge component.

[0009] As a preferred technical solution for a low calorific value stone coal recycling system, the slag discharge assembly includes a channel connected to a slag discharge port, and a roller rotatably arranged in the channel, the inner wall of the channel is in contact with the circumferential surface of the roller, and a storage trough is constructed on the circumferential side of the roller.

[0010] As a preferred technical solution for a low calorific value stone coal recovery and utilization system, the diameter of the channel port increases from the inside to the outside.

[0011] As a preferred technical solution for a low calorific value stone coal recycling system, there are multiple air inlets, which are evenly distributed side by side in the horizontal direction.

[0012] As a preferred technical solution for a low calorific value stone coal recycling system, a spoiler is connected to the air inlet, which is an elastic structure.

[0013] As a preferred technical solution for a low calorific value stone coal recycling system, the crushing mechanism includes a plurality of crushing rollers rotatably arranged in a crushing bin.

[0014] The low calorific value pebble coal recycling system provided by the utility model has the beneficial effect that: the utility model can grind the pebble coal discharged during the coal pulverizing process through the cooperation between the crushing mechanism and the air separation bin, thereby sorting the pebble coal, and the coal powder can be returned to the coal mill for utilization, while the mineral powder is directly discharged, thereby achieving the effect of further extracting the coal resources in the pebble coal, thereby reducing the waste of coal resources, and the utility model can improve the energy utilization effect of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0016] Figure 1 It is a three-dimensional diagram of the utility model.

[0017] Figure 2 It is a three-dimensional vertical cut schematic diagram of the utility model.

[0018] Figure 3 For the utility model Figure 2 Cross-sectional perspective diagram.

[0019] Figure 4 For the utility model Figure 2 A separate display diagram of the middle part of the structure.

[0020] Figure numerals: 1. crushing bin; 2. crushing mechanism; 201. crushing roller; 3. air separation bin; 4. slag discharge port; 5. discharge port; 6. air inlet; 7. slag discharge assembly; 701. channel; 702. drum; 8. storage trough; 9. spoiler. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0025] Reference Figure 1-3 , which is the first embodiment of the utility model, provides a low calorific value stone coal recycling system, including the following parts:

[0026] A crushing bin 1 and a crushing mechanism 2 arranged in the crushing bin 1, wherein the crushing bin 1 is used to be connected to a discharge end of a coal mill;

[0027] The wind separation chamber 3 is connected to the crushing chamber 1, and the wind separation chamber 3 has a slag discharge port 4, a material discharge port 5 and an air inlet 6. The position relationship of the three is as follows: Figure 3 As shown, the discharge port 5 is used to communicate with the air inlet end of the coal mill. During actual assembly, the discharge port 5 can be connected with the primary air inlet end of the coal mill through a structure such as a pipeline, and the air inlet 6 is used for primary air to enter;

[0028] A slag discharge assembly 7 connected to the slag discharge port 4, which is used to allow the slag dropped to the slag discharge port 4 to enter the outside of the slag discharge port 4 through the slag discharge assembly 7, and the slag discharge port 4 can also keep itself in a closed state through the slag discharge assembly 7;

[0029] When the utility model cooperates with the coal grinding system, the primary air directly enters the air separation bin 3 from the air inlet 6, and finally ensures that a part of the primary air enters the coal mill from the slag discharge port 4. In this process, the stone coal discharged from the coal mill falls into the crushing bin 1, is crushed by the crushing mechanism 2, and then falls into the air separation bin 3. When the primary air enters the air separation bin 3, it is blown horizontally, such as Figure 3 As shown, when the powder falls, the primary wind blows to the left. Due to the different material structures, the coal powder and the ore powder are separated by airflow and finally fall into the discharge port 5 and the slag discharge port 4 respectively. The coal powder is blown back to the pulverizer by the primary wind, and the ore powder is discharged to the outside through the slag discharge component 7. In the whole process, the coal resources in the stone coal are further recovered, thereby reducing the waste of resources. At the same time, the ground ore powder can be further recovered, so as not to hinder its further processing in different fields in the future.

[0030] Further, see Figure 1-4 The slag discharge component 7 includes a channel 701 connected to the slag discharge port 4, and the lower end of the channel 701 is open to the outside. The slag discharge component 7 also includes a roller 702 rotatably arranged in the channel 701. The inner wall of the channel 701 is in contact with the circumferential surface of the roller 702, and the two end surfaces of the roller 702 are also in contact with the inner wall of the channel 701, so that the channel 701 is in a closed state to the outside through the blocking of the roller 702. A storage trough 8 is constructed on the circumferential side of the roller 702. By configuring a rotational driving force for the roller 702, during the rotation process, when the storage trough 8 is facing upward, it is aligned with the slag discharge port 4, so that the mineral powder can fall into the storage trough 8. When the mouth of the storage trough 8 is facing downward, the mineral powder falls into the outside, thereby realizing the discharge of the mineral powder. For the rotation of the roller 702, a driving motor can be arranged outside the device to connect with the roller 702.

[0031] Further, see Figure 3 The diameter of one end of the channel 701 increases from the inside to the outside. Since the storage tank 8 has a certain pressure inside when it moves toward the air separation bin 3, the pressure is released when the mineral powder is discharged. In this process, when the air pressure is discharged, it flows out through the channel 701. The diameter of the channel 701 gradually increases, so that the air flow discharge can be slowed down, thereby reducing the dust.

[0032] Further, see Figure 1 There are multiple air inlets 6, which are evenly distributed side by side in the horizontal direction, so that when the primary air enters the air separation bin 3, the airflow evenly fills the interior of the air separation bin 3, thereby reducing the probability of dust falling from the corners without being air-separated, thereby improving the effect of the primary air in the air separation bin 3.

[0033] Further, see Figure 2 and Figure 3The air inlet 6 is connected with a spoiler 9 which is an elastic structure. The spoiler 9 can be made of components such as iron sheets or plastic membranes. When the primary wind enters, the spoiler 9 will be blown away, so that the air inlet 6 is forced to open. When the wind force decreases, the opening degree is lower, so that the space at the air inlet 6 is narrow, thereby increasing the primary wind speed. Conversely, when the primary air flow rate is larger, the opening degree of the air inlet 6 is larger. Therefore, this structure can fully maintain a certain wind speed when the primary wind is unstable, thereby ensuring the air selection effect.

[0034] Further, see Figure 1-3 The crushing mechanism 2 includes a plurality of crushing rollers 201 rotatably arranged in the crushing bin 1. The crushing rollers 201 have a simple and compact structure and will not occupy a large space. The crushing effect of the stone coal is achieved by the rotation of the crushing rollers 201. The rotation of the crushing rollers 201 can still be achieved by an external drive motor.

[0035] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A low calorific value stone coal recovery and utilization system, characterized by: include: A crushing bin (1) and a crushing mechanism (2) arranged in the crushing bin (1), wherein the crushing bin (1) is connected to a discharge end of a coal mill; a wind separation chamber (3) connected to the crushing chamber (1), the wind separation chamber (3) having a slag discharge port (4), a material discharge port (5) and an air inlet (6), the material discharge port (5) being connected to the air inlet end of the coal mill, and primary air entering the air inlet (6); A slag discharge component (7) is connected to the slag discharge port (4), and the slag enters the outside of the slag discharge port (4) through the slag discharge component (7), and the slag discharge port (4) is kept closed by the slag discharge component (7).

2. The low calorific value stone coal recycling system according to claim 1 is characterized in that: The slag discharge assembly (7) comprises a channel (701) connected to the slag discharge port (4), and a roller (702) rotatably arranged in the channel (701), the inner wall of the channel (701) is in contact with the peripheral surface of the roller (702), and a material storage trough (8) is constructed on the peripheral side of the roller (702).

3. The low calorific value stone coal recycling system according to claim 2 is characterized in that: The diameter of one end of the channel (701) increases from the inside to the outside.

4. The low calorific value stone coal recycling system according to claim 1 is characterized in that: The air inlets (6) are multiple in number and are evenly distributed side by side in the transverse direction.

5. The low calorific value stone coal recycling system according to claim 1, characterized in that: The air inlet (6) is connected to a spoiler (9) which is an elastic structure.

6. The low calorific value stone coal recycling system according to claim 1, characterized in that: The pulverizing mechanism (2) comprises a plurality of crushing rollers (201) rotatably arranged in the pulverizing bin (1).

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