Temporary storage and conveying device for pulverized coal

Abstract

The utility model relates to the technical field of boiler pulverized coal conveying devices, and discloses a pulverized coal temporary storage and conveying device which comprises a tank body, a feeding pipe is arranged on the upper portion of the tank body, a charging pipe is arranged on the side edge of the feeding pipe, a feeding rod is rotationally arranged in the feeding pipe, a feeding screw is arranged on the upper portion of the feeding rod, and the feeding screw extends into the tank body; the rotary feeder is arranged at the bottom of the tank body, and the rotary feeder is communicated with the bottom of the tank body; the conveying pipe is arranged at the bottom of the rotary feeder, and the conveying pipe is communicated with the rotary feeder. According to the technical scheme, the rotary feeder composed of the shell, the feeding shaft and the feeding plates can prevent gas in the conveying pipe from entering the tank body while pulverized coal is conveyed, and the gap space between the feeding plates can be adjusted through the limiting blocks between the feeding plates, so that the amount of the pulverized coal entering the feeding plates can be controlled; therefore, the conveying amount and the uniformity of the pulverized coal can be controlled.

Description

A pulverized coal temporary storage and conveying device Technical Field

[0001] This application relates to the technical field of boiler pulverized coal conveying devices, for example, to a pulverized coal temporary storage and conveying device. Background Technology

[0002] Currently, boilers require a large supply of pulverized coal during combustion. Since the grinding speed of pulverized coal varies, a temporary storage and buffering device is needed to temporarily store the pulverized coal and ensure a uniform supply. However, traditional pulverized coal conveying devices lack precision in quantitative conveying. Slowing down the conveying process can easily lead to segmented conveying of pulverized coal, which is detrimental to the stability of pulverized coal combustion in the boiler. Summary of the Invention

[0003] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0004] This disclosure provides a pulverized coal temporary storage and conveying device to solve the problem of intermittent conveying of pulverized coal when the conveying speed is different.

[0005] In some embodiments, the pulverized coal temporary storage and conveying device includes: a tank body, with a feed pipe at the top and a feeding pipe on the side of the feed pipe; a feeding rod rotatably disposed inside the feed pipe; a feeding screw at the top of the feeding rod; and the feeding screw extending into the tank body; a rotary feeder disposed at the bottom of the tank body and connected to the bottom of the tank body; and a conveying pipe disposed at the bottom of the rotary feeder and connected to the rotary feeder.

[0006] In some embodiments, the feeding rod extends to the bottom of the tank, and a pushing screw is provided at the bottom of the feeding rod.

[0007] In some embodiments, a distribution plate is provided at the lower part of the feeding screw, and the distribution plate is located on the inner side of the upper part of the tank.

[0008] In some embodiments, the rotary feeder includes: a housing, a feeding shaft, a feeding plate, and a limiting block. The housing has a cylindrical feeding cavity inside. The feeding shaft is rotatably disposed within the feeding cavity, and the feeding cavity and the feeding shaft are coaxially arranged. The feeding plate is disposed around the feeding shaft. A limiting block is slidably sleeved on one end of the feeding shaft. The limiting block has a circular cylindrical structure and a groove that matches the feeding plate. The limiting block can extend movably into the space between the feeding plates.

[0009] In some embodiments, a sleeve is provided at one end of the limiting block away from the feeding plate, the sleeve extends out of one side of the housing, a positioning plate is rotatably provided at the end of the sleeve, a hydraulic rod is provided on the positioning plate, and the other end of the hydraulic rod is fixedly connected to the housing.

[0010] In some embodiments, the upper part of the shell is provided with a feed inlet, the lower part of the shell is provided with a discharge outlet, the feed inlet is connected to the bottom of the tank, and the discharge outlet is connected to the conveying pipe.

[0011] In some embodiments, one end of the delivery pipe is provided with an air inlet, and the other end of the delivery pipe is provided with an outlet.

[0012] In some embodiments, a vent pipe is provided on one side of the upper part of the tank, and a control valve is provided on the vent pipe.

[0013] In some embodiments, the dispensing tray has a conical structure.

[0014] In some embodiments, the end of the limiting block near the feeding plate is a frustum structure.

[0015] The pulverized coal temporary storage and conveying device provided in this embodiment can achieve the following technical effects:

[0016] The rotary feeder, consisting of a housing, a feeding shaft, and feeding plates, can prevent gas from entering the tank while conveying pulverized coal. The gap between the feeding plates can be adjusted by the limiting blocks between the feeding plates, thereby controlling the amount of pulverized coal entering between the feeding plates and thus controlling the conveying volume and uniformity of the pulverized coal.

[0017] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0019] Figure 1 is a schematic diagram of the structure of the pulverized coal temporary storage and conveying device provided in an embodiment of this disclosure;

[0020] Figure 2 is a three-dimensional structural schematic diagram of the pulverized coal temporary storage and conveying device provided in an embodiment of this disclosure;

[0021] Figure 3 is a schematic longitudinal cross-sectional view of the pulverized coal storage and conveying device provided in an embodiment of this disclosure.

[0022] Figure 4 is a schematic diagram of the vertical cross-sectional structure of the pulverized coal temporary storage and conveying device provided in the embodiment of this disclosure;

[0023] Figure 5 is a schematic diagram of the feeding plate and limiting block structure provided in the embodiments of this disclosure.

[0024] Figure label:

[0025] 100. Tank body; 101. Feed pipe; 102. Feeding pipe; 103. Feeding rod; 104. Feeding screw; 105. Pushing screw; 106. Distributor plate; 107. Vent pipe; 108. Control valve; 200. Shell; 201. Feeding shaft; 202. Feeding plate; 203. Limiting block; 204. Feeding cavity; 206. Groove; 207. Sleeve; 208. Positioning plate; 209. Hydraulic rod; 300. Feed inlet; 301. Discharge outlet; 302. Air inlet; 303. Exhaust outlet; 400. Conveying pipe. Detailed Implementation

[0026] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0027] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0028] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0029] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0030] Unless otherwise stated, the term "multiple" means two or more.

[0031] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0032] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0034] Referring to Figures 1-3, this embodiment of the present disclosure provides a pulverized coal temporary storage and conveying device, comprising a tank 100, an upper feed pipe 101, and a feeding pipe 102 on the side of the feed pipe 101. A feeding rod 103 is rotatably disposed inside the feed pipe 101, and a feeding screw 104 is disposed on the upper part of the feeding rod 103, the feeding screw 104 extending into the tank 100; a rotary feeder is disposed at the bottom of the tank 100 and is connected to the bottom of the tank 100; and a conveying pipe 400 is disposed at the bottom of the rotary feeder and is connected to the rotary feeder.

[0035] The pulverized coal temporary storage and conveying device provided in this embodiment has a sealed space tank 100. The upper part of the tank 100 is connected to a feed pipe 101, and a feeding pipe 102 is provided on one side of the feed pipe 101. Pulverized coal can be conveyed into the feed pipe 101 through the feeding pipe 102. The pulverized coal entering the feed pipe 101 is conveyed by the rotation of the feeding rod 103 and the feeding screw 104, which can prevent the pulverized coal from accumulating in the feeding pipe 102. The pulverized coal entering the tank 100 can be temporarily stored. The start and stop of the rotary feeder can be controlled as needed. The rotary feeder can convey the pulverized coal in the tank 100 into the conveying pipe 400, and then the pulverized coal is conveyed into the boiler for fuel supply through the conveying pipe 400.

[0036] Optionally, the feeding rod 103 extends to the bottom of the tank 100, and a pushing screw 105 is provided at the bottom of the feeding rod 103.

[0037] In this way, the lower end of the feeding rod 103 extends to the bottom of the tank 100, and a pushing screw 105 is provided at the bottom end of the feeding rod 103. By rotating the pushing screw 105, the coal powder at the bottom of the tank 100 can be effectively pushed into the rotary feeder, ensuring that the coal powder is uniform and continuous during the conveying process.

[0038] Optionally, a distribution plate 106 is provided at the lower part of the feeding screw 104, and the distribution plate 106 is located on the inner side of the upper part of the tank body 100.

[0039] In this way, the distribution plate 106 can effectively disperse the coal powder entering the tank 100, avoid local accumulation, and prevent the coal powder from accumulating and clumping, which would cause problems with smooth conveying.

[0040] Optionally, the rotary feeder includes: a housing 200, a feeding shaft 201, a feeding plate 202, and a limiting block 203. The housing 200 has a cylindrical feeding cavity 204 inside. The feeding shaft 201 is rotatably disposed in the feeding cavity 204, and the feeding cavity 204 and the feeding shaft 201 are coaxially arranged. The feeding plate 202 is arranged around the feeding shaft 201. The limiting block 203 is slidably sleeved on one end of the feeding shaft 201. The limiting block 203 has a circular cylindrical structure, and a groove 206 matching the feeding plate 202 is opened on the limiting block 203. The limiting block 203 can be movably extended into the feeding plate 202.

[0041] In this way, the rotary feeder can quantitatively transport pulverized coal from the tank 100 to the conveying pipe 400, thereby achieving precise control of the pulverized coal flow rate, ensuring maximum boiler combustion efficiency, and reducing pulverized coal waste. The rotary feeder includes a shell 200, a feeding shaft 201, a feeding plate 202, and a limiting block 203. The shell 200 has an internal cylindrical cavity. The upper part of the shell 200 is connected to the bottom of the tank 100, allowing pulverized coal to fall into the shell 200. The lower part of the shell 200 is connected to the conveying pipe 400, allowing the pulverized coal in the shell 200 to be transported into the conveying pipe 400. The feeding shaft 201 rotates within the cavity and is coaxially arranged with the circular cavity. The feeding plate 202 is arranged around one side of the feeding shaft 201. Driven by the rotation of the feeding shaft 201, the coal powder falling from the tank 100 can be pushed to the lower part of the shell 200, allowing the coal powder to enter the conveying pipe 400. The conveying speed of the coal powder can be controlled by controlling the rotation speed of the feeding shaft 201. A limiting block 203 is slidably sleeved on the other end of the feeding shaft 201. The groove 206 on the limiting block 203 matches the feeding plate 202. The feeding plate 202 can be inserted into the groove 206 in the limiting block 203. The limiting block 203 can be movably set between the feeding plates 202. By adjusting the position of the limiting block 203 extending between the feeding plates 202, the accommodating space between the feeding plates 202 can be controlled, thereby controlling the amount of coal powder conveyed. This ensures that the feeding shaft 201 can achieve precise adjustment of different coal powder flow rates at the same rotation speed, meeting the different combustion needs of the boiler.

[0042] Optionally, the end of the limiting block 203 away from the feeding plate 202 is provided with a sleeve 207, the sleeve 207 extends out of the housing 200, and a positioning plate 208 is rotatably provided at the end of the sleeve 207. A hydraulic rod 209 is provided on the positioning plate 208, and the other end of the hydraulic rod 209 is fixedly connected to the housing 200.

[0043] In this way, the end of the limiting block 203 away from the feeding plate 202 is connected to the positioning plate 208 through the sleeve 207. The hydraulic rod 209 drives the positioning plate 208 to move. The sleeve 207 can be extended and retracted within the housing 200 by the hydraulic rod 209. The position of the limiting block 203 between the feeding plates 202 can be controlled by the extension and retraction of the sleeve 207, thereby precisely adjusting the accommodating space between the feeding plates 202.

[0044] Optionally, the upper part of the shell 200 is provided with a feed inlet 300, the lower part of the shell 200 is provided with a discharge outlet 301, the feed inlet 300 is connected to the bottom of the tank 100, and the discharge outlet 301 is connected to the conveying pipe 400.

[0045] In this way, the feed inlet 300 at the top of the shell 200 is connected to the bottom of the tank 100, and the feed inlet 300 is located at the top of the feeding plate 202 to ensure that the coal powder falls smoothly into the feeding plate 202 inside the shell 200, thereby ensuring the stable conveying of the coal powder. The discharge port 301 at the bottom of the shell 200 is connected to the conveying pipe 400, and the coal powder enters the conveying pipe 400 through the discharge port 301 to achieve efficient conveying.

[0046] Optionally, one end of the conveying pipe 400 is provided with an air inlet 302, and the other end of the conveying pipe 400 is provided with an outlet 303.

[0047] In this way, the air inlet 302 introduces airflow to form pneumatic conveying, which enhances the fluidity of pulverized coal and improves conveying efficiency. The outlet 303 conveys the pulverized coal mixed with air to the boiler combustion chamber, ensuring that the pulverized coal is evenly distributed, fully combusted, and improving thermal efficiency.

[0048] Optionally, a vent pipe 107 is provided on one side of the upper part of the tank body 100, and a control valve 108 is provided on the vent pipe 107.

[0049] In this way, the vent pipe 107 and vent valve at the top of the tank 100 can regulate the air pressure inside the tank 100, preventing the stable conveying of pulverized coal from being affected by excessively high or low air pressure inside the tank 100.

[0050] Optionally, the dispensing disc 106 has a conical structure.

[0051] In this way, the distribution plate 106 has a conical structure, which allows the coal powder on the distribution plate 106 to slide down evenly, ensuring uniform distribution of coal powder, preventing coal powder accumulation, and affecting conveying efficiency.

[0052] Optionally, the end of the limiting block 203 near the feeding plate 202 is a frustum structure.

[0053] In this way, one end of the limiting block 203 is a frustum structure, which makes it easier for coal powder to fall into the gap between the feeding plates 202 and prevents the side of the limiting block 203 from blocking the coal powder from falling in.

[0054] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A pulverized coal temporary storage and conveying device, characterized in that, include: A tank body (100) is provided with a feed pipe (101) at the top, and a feeding pipe (102) is provided on the side of the feed pipe (101). A feeding rod (103) is rotatably provided inside the feed pipe (101), and a feeding screw (104) is provided on the upper part of the feeding rod (103). The feeding screw (104) extends into the tank body (100). A rotary feeder is provided at the bottom of the tank body (100), and the rotary feeder is connected to the bottom of the tank body (100). A conveying pipe (400) is provided at the bottom of the rotary feeder, and the conveying pipe (400) is connected to the rotary feeder.

2. The pulverized coal temporary storage and conveying device according to claim 1, characterized in that, The feeding rod (103) extends to the bottom of the tank (100), and a pushing screw (105) is provided at the bottom of the feeding rod (103).

3. The pulverized coal temporary storage and conveying device according to claim 1, characterized in that, The feeding screw (104) is provided with a distribution plate (106) at its lower part, and the distribution plate (106) is located on the upper inner side of the tank body (100).

4. The pulverized coal temporary storage and conveying device according to claim 1, characterized in that, The rotary feeder includes: a housing (200), a feeding shaft (201), a feeding plate (202), and a limiting block (203). The housing (200) has a cylindrical feeding cavity (204) inside. The feeding shaft (201) is rotatably disposed in the feeding cavity (204), and the feeding cavity (204) and the feeding shaft (201) are coaxially disposed. The feeding plate (202) is disposed around the feeding shaft (201). The limiting block (203) is slidably sleeved on one end of the feeding shaft (201). The limiting block (203) is a circular cylindrical structure, and a groove (206) matching the feeding plate (202) is opened on the limiting block (203). The limiting block (203) can be movably extended into the feeding plate (202).

5. The pulverized coal temporary storage and conveying device according to claim 4, characterized in that, The limiting block (203) is provided with a sleeve (207) at one end away from the feeding plate (202). The sleeve (207) extends out of the housing (200) and a positioning plate (208) is rotatably provided at the end of the sleeve (207). A hydraulic rod (209) is provided on the positioning plate (208) and the other end of the hydraulic rod (209) is fixedly connected to the housing (200).

6. The pulverized coal temporary storage and conveying device according to claim 4, characterized in that, The upper part of the shell (200) is provided with a feed inlet (300), the lower part of the shell (200) is provided with a discharge outlet (301), the feed inlet (300) is connected to the bottom of the tank (100), and the discharge outlet (301) is connected to the conveying pipe (400).

7. The pulverized coal temporary storage and conveying device according to claim 1, characterized in that, The conveying pipe (400) is provided with an air inlet (302) at one end and an outlet (303) at the other end.

8. The pulverized coal temporary storage and conveying device according to claim 1, characterized in that, A vent pipe (107) is provided on one side of the upper part of the tank (100), and a control valve (108) is provided on the vent pipe (107).

9. The pulverized coal temporary storage and conveying device according to claim 3, characterized in that, The material distribution plate (106) has a conical structure.

10. The pulverized coal temporary storage and conveying device according to claim 4, characterized in that, The end of the limiting block (203) near the feeding plate (202) is a frustum structure.

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