LIGNITE TRANSIENT DEHYDRATION UPGRADING AND TEMPERATURE AND PRESSURE INSTANT GENERATION DEVICE SYSTEM

Abstract

The present disclosure relates to a lignite transient dehydration upgrading and temperature and pressure instant generation device system. Materials are added by a feeding device above the steam dehydration system and enter a feeding area, at the moment, a sealing valve is opened, an internal material platform is pushed forwards in a rotary mode, wet materials enter a dehydration area, and then the sealing valve is closed after dry materials enter. Saturated steam is added into the device by the steam generation system, then the device is adjusted to be in a high-temperature and high-pressure state by the electric control system, and the pressure is continuously stabilized for a certain period of time. The sealing valve is then opened, the dry materials enter a discharging area and then are discharged by a conveying belt, while new wet materials enter the dehydration area accordingly to begin the next round of dehydration.

Claims

1. A lignite transient dehydration upgrading and temperature and pressure instant generation device system, comprising a steam generation system, an electric control system, a steam dehydration system, and a steam recovery system, wherein materials are added by a feeding device above the steam dehydration system and enter a feeding area, after a sealing valve is opened, an internal material platform is pushed forwards in a rotary mode, wet materials enter a dehydration area, and then the sealing valve is closed after the materials enter; saturated steam is added into the device by the steam generation system, then the device is adjusted to be in a high-temperature and high-pressure state by the electric control system, and the pressure is continuously stabilized for a certain period of time; in the stage, the saturated stream takes away water in the materials through gas-liquid exchange, then a pressure relief valve is controlled by the electric control system to instantly release pressure to a normal-temperature and normal-pressure state, the internal steam causes steam explosion to destroy pores of lignite and high-water-content low-quality coal and then is guided into the steam recovery system through a pressure relief opening, and at the moment, the sealing valve is opened, and dry materials enter the discharging area and then are discharged by a conveying belt.

2. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein the steam generated by the steam generation system is saturated steam at normal temperature and normal pressure, and feeding of the steam is controlled by an air inlet valve.

3. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein the feeding area and the discharging area are both provided with airtight plugs, and the air plugs are opened during feeding and discharging and are sealed when the device is in operation.

4. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein the electric control system is used to regulate and control a heating system through the feeding and releasing of the steam, thus regulating temperature and pressure intensity inside the steam dehydration system.

5. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein an upper feed opening and a lower discharge opening of the steam dehydration system are both provided with high-pressure sealing devices.

6. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein the steam dehydration system comprises a temperature sensing device and a pressure intensity sensing device to monitor temperature and pressure intensity changes inside the system in real time.

7. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein the steam dehydration system is connected to the sealing valves of different areas under the unified regulation and control of the electric control system, and the sealing valves are closed when the device is in a dehydration state.

8. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein the pressure relief valves of the steam dehydration system are arranged at a plurality of points below the dehydration area.

9. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein the steam recovery system is provided with a thermal insulating layer to make the recovered steam return to the steam generation system.

10. The lignite transient dehydration upgrading and temperature and pressure instant generation device system of claim 1, wherein the device further comprises a tail gas purification device to filter out part of materials and dissolved ions brought out in the steam.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a diagram of a device of an embodiment of the present disclosure.

[0017] In the drawings, 1—electric control system; 2—steam generation system; 3, 17—airtight plug; 4—feeding area; 5, 6, 16—sealing valve; 6, 9—pressure intensity sensing device; 7—air inlet valve; 8—dehydration area; 11—discharging area; 12—steam recovery system; 13—feeding device; 14—temperature sensing device; 15—pressure relief valve; 18—tail gas purification device.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Embodiment 1

[0018] A lignite transient dehydration upgrading and temperature and pressure instant generation device system is composed of a steam generation system 2, a steam dehydration system, a steam recovery system 12, and a tail gas purification device 18. Materials are added by a feeding device above the steam dehydration system and enter a feeding area 4, at the moment, sealing valves 13 and 17 are opened, an internal material platform is pushed forwards in a rotary mode, wet materials enter a dehydration area 8, and then the sealing valves 3 and 17 are closed after the materials enter. Saturated steam is added into the device by the steam generation system 2 through an air inlet valve 7, then the device is adjusted to be in a high-temperature and high-pressure state by the electric control system, and the pressure is continuously stabilized for a certain period of time; in the stage, the saturated stream takes away water in the materials through gas-liquid exchange, the pressure is instantly released to a normal-temperature and normal-pressure state by the pressure relief valve 15, the internal steam causes steam explosion to destroy pores of lignite and high-water-content low-quality coal and then is guided into the steam recovery system through a pressure relief opening. At the moment, sealing valves 5, 10 and 16 are opened, dry materials enter a discharging area 11 and then are discharged by a conveying belt, while new wet materials enter the dehydration area 8 to start the next round of dehydration.

Embodiment 2

[0019] Lignite contains water before dehydration, the materials are added by the feeding device 13 above the steam dehydration system and then enter the feeding area 4, at the moment, the sealing valves 5 and 10 are opened, the internal material platform is pushed forwards in a rotary mode, the lignite enters the dehydration area 8, and then the sealing valves 5 and 10 are closed after the dehydrated lignite enters. The saturated steam is added into the device by the stream generation system, and then the pressure intensity is regulated to 2 Mpa by pressure intensity sensing devices 6 and 9 of an electric control system 1, and the pressure is stabilized; in the stage, the saturated stream takes away water in the lignite through gas-liquid exchange, and then a pressure relief valve 14 is controlled by the electric control system to instantly release the pressure to the normal-temperature and normal-pressure state, the internal steam causes steam explosion to destroy pores of the lignite and then is guided into the steam recovery system 12 through the pressure relief valve 15. At the moment, the sealing valves 5 and 10 are opened, the dehydrated lignite enters the discharging area 11 and then is discharged by the conveying belt, the water of the lignite is removed, and the lignite after water removal has no reabsorption phenomenon.

[0020] The above is only an individual embodiment of the present disclosure, and it should be noted that for the dehydration apparatus of the present disclosure, changes can be made to the material processing mode, the operating environment and the like without departing from the principle of the present disclosure, and these different processing modes should also be regarded as the scope of protection of the present disclosure. For those skilled in the art, several improvements and modifications can also be made without departing from the principles of the present disclosure, which should also be considered to be within the scope of protection of the present disclosure.