Rapid coal sample drying device

Abstract

The utility model discloses a rapid coal sample drying device, and belongs to the technical field of coal sampling and sample preparation. In order to solve the problems of long coal sample drying time, low efficiency and the like puzzling the power plant fire coal management all the time, an efficient and rapid 3 mm coal sample drying mode does not exist at present, the fire coal acceptance inspection efficiency of the power plant is improved. The device disclosed by the utility model is divided into four areas, namely a drying area, a blast heating area, a control area and a sample tray storage area, the drying area comprises a plurality of drying rooms which are separated from one another and are independently controlled, and each drying room works independently; an air blower is arranged in the blast heating area and is communicated with the drying area through a ventilation pipe, the output end of the blast heating area is communicated with a heater in the drying room, the air pressure can be controlled, an outlet of the ventilation pipe is communicated with the drying rooms through a plurality of output pipelines, and an air homogenizing plate is arranged at a ventilation opening of each output pipeline, so that a coal sample is uniformly heated by wind and is not lost; the device has the advantages of short drying time, high drying efficiency and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of raw coal sampling and preparation, and specifically relates to a coal sample rapid drying device, which is mainly used in the coal sample preparation process. Background Art

[0002] The coal acceptance process involves coal sampling, sample preparation, and testing. The rapid upload of coal test results to the management system helps improve fuel management efficiency. The coal samples collected are generally 13mm or 6mm, while the sample size tested in the laboratory is 0.2mm. The coal sample preparation process generally includes air drying, crushing, reduction, and grinding. The air drying (heat drying can also be used, but the temperature should be less than 50°C) process is to reduce the external moisture of the sample to facilitate the normal crushing and reduction process. Crushing in the sample preparation process is the process of reducing the sample particle size, and coal itself is relatively wet and has a high water content. Before preparing the 3mm sample to a 0.2mm sample, the coal sample needs to be dried to ensure the representativeness of the sample and the accuracy of the test results.

[0003] Domestically, coal is dried mainly by natural air drying, hot air and large oven drying. The natural air drying method is too inefficient, takes a long time (usually 24 to 48 hours), and occupies a large area; the hot air and large oven drying methods use high-power heating lamps or high-power ovens to dry and dehumidify coal samples. Water evaporation only occurs on the surface of the material, and it is difficult for the inner material to evaporate water. Once the air on the surface of the material reaches saturated water absorption, it will no longer absorb water. This method will not dehumidify too quickly, and the efficiency is also low, and the time is long. In addition, the common drying ovens on the market use ordinary fans, which have slow ventilation speed and low ventilation efficiency, so the air in the box will be close to saturated water absorption. Therefore, the efficiency of using an oven to dry high-water content materials is also relatively low, and the time is also long, which affects the reporting of test results.

[0004] Therefore, in the process of coal acceptance sampling, how to effectively and quickly dry coal samples and improve drying efficiency has always been a difficult problem that plagues coal management in power plants.

[0005] In view of the fact that there is currently no efficient and fast method for drying coal samples, the utility model has designed and developed a simple device that is suitable for rapid drying of coal samples. By adopting wind penetration technology, hot air penetrates between coal sample particles, greatly increasing the contact surface area of ​​the hot air, achieving high drying efficiency without changing the coal quality characteristics. This solves the problem of rapid drying of coal samples that has long plagued coal management in power plants, and improves the coal acceptance efficiency of power plants. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a device which has reasonable structural design, is safe and reliable, is easy to operate and is suitable for rapid drying of coal samples.

[0007] The technical solution adopted by the utility model to solve the above-mentioned problem is: a coal sample rapid drying device, characterized in that the device is divided into four areas, namely a drying area, a blast heating area, a control area, and a sample tray storage area; the drying area includes several drying rooms separated from each other and individually controlled, each of the drying rooms is equipped with a switch door and a start / end button, and each of the drying rooms works independently; a blower is provided in the blast heating area, which is connected to the drying area through a ventilation pipe, and an air valve is provided at its inlet end, and its output end leads to a heater in the drying room, and the wind pressure can be controlled, and the outlet of the ventilation pipe leads to several drying rooms through several output pipes, and an air distribution plate is provided at the ventilating port of the output pipe, so that the coal sample is evenly heated by the wind and there is no loss of the coal sample; the control area controls the operating status of the drying area and the blast heating area.

[0008] Preferably, each of the drying rooms is provided with a partition, and a coal sample holder for fixing the coal sample tray is provided at the center of each partition. The coal sample tray is placed on the coal sample holder, and dry hot air is blown into the dry coal sample from the bottom.

[0009] Preferably, the bottom of the coal sample tray is composed of a screen, and the size of the screen is small enough to only allow air to pass through without spilling the coal sample.

[0010] Preferably, an exhaust hole is provided on the top of the drying room, and the exhaust hole is connected to an exhaust fan through an air pipe.

[0011] Preferably, the control area is provided with a display screen to display the drying time, remaining time and the like. The control system in the control area has a recording and storage function to record the number of dried samples, drying time, drying temperature and abnormal conditions and the like.

[0012] Compared with the prior art, the utility model has the following advantages and effects: the use of air blast can make the ventilation of the material in the coal sample tray more uniform, and under a reasonable wind speed in the cross section of the coal sample tray, it can ensure that the sample is not carried away by the airflow, thereby ensuring the integrity of the sample; the air pressure of the air blast is easy to control, and the hot air generated by the heater can contact the coal sample tray evenly and at a reasonable air pressure, thereby improving the drying efficiency of the entire sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the device in the utility model.

[0014] Figure 2 It is a schematic diagram of part of the internal structure of the device in the utility model.

[0015] In the figure: drying area 10, blast heating area 20, control area 30, sample tray storage area 40;

[0016] Air distribution plate 1, heater 2, partition plate 3, sealing plate 4, coal sample tray 5, blower 6, ventilation pipe 7. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0018] Example

[0019] Referring to the accompanying drawings, in this embodiment, a coal sample rapid drying device is provided, and the device is divided into four areas, namely a drying area 10, a blast heating area 20, a control area 30, and a sample tray storage area 40; the drying area 10 includes three drying rooms separated from each other and individually controlled, each drying room is equipped with a switch door and a start / end button, and each drying room works independently; a blower 6 is provided in the blast heating area 20, which is connected to the drying area 10 through a ventilation pipe 7, and an air valve is provided at its inlet end, and its output end leads to a heater 2 in the drying room, and the wind pressure can be controlled. The outlet of the ventilation pipe 7 is respectively connected to the three drying rooms through three output pipes, and an air distribution plate 1 is provided at the ventilation opening of the output pipe, so that the coal sample is evenly heated by the wind and there is no loss of the coal sample; the control area 30 controls the operating status of the drying area 10 and the blast heating area 20.

[0020] In this embodiment, each drying room is provided with a partition 3, and a coal sample holder for fixing a coal sample tray 5 is provided at the center of each partition 3. The coal sample tray 5 is placed on the coal sample holder, and dry hot air is blown into the dry coal sample from the bottom.

[0021] In this embodiment, the bottom of the coal sample tray 5 is composed of a screen, and the size of the screen is small enough to only allow air to pass through without spilling the coal sample.

[0022] In this embodiment, an exhaust hole is provided on the top of the drying room, and the exhaust hole is connected to the exhaust fan through an air pipe.

[0023] In this embodiment, the control area 30 is equipped with a display screen to display the drying time, remaining time and other contents. The control system in the control area 30 is an existing product with a recording and storage function, which can record the number of dried samples, drying time, drying temperature and abnormal conditions, etc.

[0024] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0025] In addition, it should be noted that the above content described in this specification is only an example of the structure of the utility model. All equivalent changes made based on the structure, features and principles described in the utility model patent are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications, supplements or replace the specific embodiments described in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A coal sample rapid drying device, characterized in that: The invention comprises a drying area (10), a blast heating area (20), a control area (30) and a sample tray storage area (40); the drying area (10) comprises a plurality of mutually independent drying rooms, each of which is equipped with a switch door and a start / end button; a blower (6) is provided in the blast heating area (20), and the blast heating area (20) is connected to the drying area (10) through a ventilation pipe (7); an air valve is provided at the inlet end of the ventilation pipe (7); an output end of the ventilation pipe (7) leads to a heater (2) in the drying room; an outlet of the ventilation pipe (7) leads to a plurality of drying rooms respectively through a plurality of output pipes, and an air distribution plate (1) is provided at the ventilation opening of the output pipe; the control area (30) is used to control the operating state of the drying area (10) and the blast heating area (20).

2. The coal sample rapid drying device according to claim 1 is characterized in that: Each of the drying rooms is provided with a partition (3), and a coal sample holder for fixing a coal sample tray (5) is provided at the center of each of the partitions (3), and the coal sample tray (5) is placed on the coal sample holder.

3. The coal sample rapid drying device according to claim 2 is characterized in that: The bottom of the coal sample tray (5) is composed of a screen.

4. The coal sample rapid drying device according to claim 1 is characterized in that: An exhaust hole is arranged on the top of the drying room, and the exhaust hole is connected to the exhaust fan through an air pipe.

5. The coal sample rapid drying device according to claim 1 is characterized in that: The control area (30) is provided with a display screen, and the control system in the control area (30) has a recording and storage function.

Images