Water-coal-slurry gasification coarse slag dehydration device

Abstract

The utility model discloses a coal water slurry gasification coarse slag dewatering device, which is characterized in that a slag conveyor is communicated with a coarse slag feeding bin, the coarse slag feeding bin is communicated with a vibrating screen through a three-way flap valve, the vibrating screen is communicated with a coarse slag discharging bin, and the bottom of the coarse slag discharging bin is communicated to a slag car through a flashboard discharging valve. And steam coils are arranged at the upper parts of the coarse slag feeding bin and the coarse slag discharging bin, and are horizontally arranged in an upper-inlet and lower-outlet manner. Vibrators are arranged on the side walls of the bottoms of the coarse slag feeding bin and the coarse slag discharging bin correspondingly, and slag blocking in the slag discharging process is prevented. The coal gasification coarse slag dehydration device is simple in structure, compact in arrangement, low in energy consumption and low in pollution, can realize a slag-water separation effect after being put into use, guarantees a sanitary environment of a coarse slag transfer production site, and reduces the automobile transportation cost.

Description

Technical Field

[0001] This utility model belongs to the field of slag-water separation technology, specifically relating to a device for dewatering coarse slag from coal-water slurry gasification. Background Technology

[0002] The coarse slag produced by the coal-water slurry gasification process is classified as slag-type solid waste. After being quenched with water, the temperature of the coarse slag is still 65°C. After being scraped by a slag remover, the slag falls directly into the truck bed. Due to the characteristics of the coarse slag material, its moisture content is as high as 55%. During the continuous slag collection process after loading, a large amount of black water will seep from the gaps at the bottom of the truck bed to the ground, polluting the production area. At the same time, after the truck is full of coarse slag, it must remain on site for a long time to filter the water before it can be transported out of the factory area. Otherwise, it will also pollute the surrounding environment during transportation. In addition, the daily transportation cost of coarse slag with high moisture content by road is relatively high. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a coarse slag dewatering device for dewatering treatment. This utility model device has the characteristics of simple installation, compact layout, low energy consumption and low pollution, including a slag pretreatment unit, a vibrating screen dewatering unit and a slag posttreatment unit.

[0004] In a preferred embodiment, the slag pretreatment unit includes a coarse slag feed hopper, an induced draft fan, a steam coil, a vibrator, a three-way flap valve, and auxiliary pipelines for high-level venting and low-level drainage.

[0005] In the preferred embodiment, the three-way flap valve of the slag pretreatment unit has a spare port slide plate unloading valve below it. If the vibrating screen dewatering unit or the post-treatment unit malfunctions or is under maintenance, the coarse slag can be loaded directly onto the truck without being dewatered temporarily.

[0006] In a preferred embodiment, the vibrating screen dewatering unit includes a vibrating screen with a sloping screen plate made of stainless steel. The screen plate separates coarse slag from water, and the clean black water after separation overflows through a chute to the front chamber of the slag remover for recycling.

[0007] In a preferred embodiment, the post-processing unit includes a coarse slag discharge hopper, a steam coil, a vibrator, a slide gate discharge valve, an exhaust fan, and auxiliary pipelines for high-level venting and low-level drainage.

[0008] The coarse slag dewatering device for coal-water slurry gasification provided by the above unit is configured such that the slag remover is connected to the coarse slag feed hopper, the coarse slag feed hopper is connected to the vibrating screen through a three-way flap valve, the vibrating screen is connected to the coarse slag discharge hopper, and the bottom of the coarse slag discharge hopper is connected to the slag car through a slide plate unloading valve.

[0009] Both the coarse slag feed hopper and the coarse slag discharge hopper are equipped with steam coils at the top, and the steam coils are arranged horizontally with the feed inlet at the top and the discharge outlet at the bottom.

[0010] Both the bottom sidewalls of the coarse slag feed hopper and the coarse slag discharge hopper are equipped with vibrators to prevent slag blockage during the slag discharge process.

[0011] The top of the coarse slag feed hopper is connected to the induced draft fan via a pipe. One end of the induced draft fan discharges air, while the other end is connected to the slag removal machine via a condensation pipe.

[0012] The top of the coarse slag discharge hopper is connected to the exhaust fan. One exhaust fan vents air, while the other is connected to the slag removal machine through a condensate pipe.

[0013] The dewatering screen plate at the bottom of the vibrating screen has a 2-5° tilt angle, which increases the residence time of coarse residue during dewatering.

[0014] The dewatering screen plate of the vibrating screen is assembled from multiple pieces, which facilitates partial disassembly and replacement. The dewatering screen plate is arranged with a 2-5° slope to extend the residence time of coarse residue during dewatering.

[0015] The connection between the end of the vibrating screen and the coarse slag discharge bin has an inclination angle of 10-15°, allowing the coarse slag to slide from the front end of the vibrating screen into the coarse slag discharge bin.

[0016] The coarse slag feed hopper is also connected to the slag truck via a three-way flap valve.

[0017] The present invention provides a dewatering device for coarse slag from coal-water slurry gasification. By adopting the above-mentioned device, the following beneficial effects can be achieved: through pretreatment of the slag feed, dewatering by vibrating screen, and post-treatment of the slag discharge, the moisture content of the gasification coarse slag can be gradually reduced from 55% to 30%, effectively reducing transportation costs; the device has a simple structure, compact layout, low energy consumption, and low pollution. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of a coal-water slurry gasification coarse slag dewatering device involved in this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of a vibrating screen.

[0020] In the diagram: 1-Slag remover, 2-Coarse slag feed hopper, 3-Steam coil, 4-Three-way flap valve, 5-Vibrating screen, 5-1 Dewatering screen plate, 6-Coarse slag discharge hopper, 7-Slide plate unloading valve, 8-Induced draft fan, 9-Exhaust fan, 10-Slag car, 11-Spare slide plate unloading valve, 12-Vibrator. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. As shown in the figures, the present invention is a coarse slag dewatering device for coal-water slurry gasification, comprising a slag pretreatment unit, a vibrating screen dewatering unit, and a slag posttreatment unit.

[0022] like Figure 1A coarse slag dewatering device for coal-water slurry gasification includes a slag remover 1, a coarse slag feed hopper 2, a steam coil 3, a three-way flap valve 4, a vibrating screen 5, a coarse slag discharge hopper 6, a slide gate discharge valve 7, an induced draft fan 8, an exhaust fan 9, a slag car 10, a spare slide gate discharge valve 11, and a vibrator 12.

[0023] A coarse slag dewatering device for coal-water slurry gasification, wherein a slag remover 1 is connected to a coarse slag feed hopper 2, the coarse slag feed hopper 2 is connected to a vibrating screen 5 through a three-way flap valve 4, the vibrating screen 5 is connected to a coarse slag discharge hopper 6, and the bottom of the coarse slag discharge hopper 6 is connected to a slag car 10 through a slide plate unloading valve 7.

[0024] Both the coarse slag feed hopper 2 and the coarse slag discharge hopper 6 are equipped with steam coils 3 at the top. The steam coils 3 are arranged horizontally with the steam entering from the top and exiting from the bottom.

[0025] Both the bottom sidewalls of the coarse slag feed hopper 2 and the coarse slag discharge hopper 6 are equipped with vibrators 12 to prevent slag blockage during the slag discharge process.

[0026] The top of the coarse slag feed silo 2 is connected to the induced draft fan 8 through a pipe. The induced draft fan 8 discharges air in one direction and is connected to the slag remover 1 through a condensation pipe in the other direction.

[0027] The top of the coarse slag discharge hopper 6 is connected to the exhaust fan 9. The exhaust fan 9 discharges air in one direction and is connected to the slag remover 1 through a condensation pipe in the other direction.

[0028] The dewatering screen plate of the vibrating screen is composed of 6 screen plates, which is convenient for partial disassembly and replacement. The dewatering screen plate is arranged with a 2° slope to increase the residence time of coarse residue during dewatering.

[0029] The end of the vibrating screen 5 has an inclination angle of 10-15° to the coarse slag discharge bin 6, so that the coarse slag slides from the front end of the vibrating screen into the coarse slag discharge bin 6.

[0030] The coarse slag feed hopper 2 is also connected to the slag car 10 via a three-way flap valve 4.

[0031] After being chilled to 65°C, the coarse slag in the front chamber of the slag remover 1 is scraped out by scrapers and falls into the pretreatment unit by gravity. The slag pretreatment unit includes a coarse slag feed hopper 2, an induced draft fan 8, a steam coil 3, a vibrator 12, a three-way flap valve 4, and auxiliary pipelines for high-level venting and low-level drainage. Due to its own temperature of 65°C, the coarse slag volatilizes some water vapor. After falling into the coarse slag feed hopper 2, it is preheated by the steam coil 3, which increases the temperature and the amount of water vapor evaporation. After passing through the induced draft fan 8, the water is vented at a high point. The condensed water after passing through the induced draft fan 8 is collected and discharged to the front chamber of the slag remover 1 for recycling. The coarse slag, after preliminary dewatering, enters the vibrating screen dewatering unit through the three-way flap valve 4. The coarse slag is dewatered by the vibrating screen 5, and the black water collected at the bottom overflows through the overflow pipeline to the front chamber of the slag remover 1 for recycling. The coarse slag is then ensured to flow into the post-treatment unit at a certain inclination at the front end of the vibrating screen 5. The post-processing unit includes a coarse slag discharge hopper 6, a steam coil 3, a vibrator 12, a slide gate discharge valve 7, an exhaust fan 9, and auxiliary pipelines for high-level venting and low-level drainage. The coarse slag entering the discharge hopper 6 is heated by the steam coil 3, generating steam, which is then discharged by the exhaust fan 9. The dehydrated coarse slag falls into the slag cart 10 through the slide gate discharge valve 7, ensuring the smooth progress of the dewatering process. The coarse slag with a moisture content of 55% is dewatered through multiple stages to below 30%, ensuring that the wet coarse slag meets the requirements before being discharged.

[0032] In the preferred embodiment, the slag pretreatment unit includes a coarse slag feed hopper 2, an induced draft fan 8, a steam coil 3, a vibrator 12, a three-way flap valve 4, and auxiliary pipelines for high-level venting and low-level drainage.

[0033] In the preferred embodiment, the vibrating screen dewatering unit includes a vibrating screen 5 with a sloping screen plate made of stainless steel. The screen plate is used to separate the coarse slag from the water. The clean black water after separation overflows through a chute to the front chamber of the slag remover 1 for recycling, while the slag falls into the coarse slag discharge chamber 6 for further dewatering.

[0034] In a preferred embodiment, the post-processing unit includes a coarse slag discharge hopper 6, a steam coil 3, a vibrator 12, a slide gate discharge valve 7, an exhaust fan 9, and auxiliary pipelines for high-level venting and low-level drainage. The dewatered coarse slag falls into the slag car 10 through the slide gate discharge valve 7.

[0035] In the preferred embodiment, the three-way flap valve 4 of the slag pretreatment unit has a spare port slide plate unloading valve 11 below it. If the vibrating screen 5 malfunctions or is under maintenance, the coarse slag can be temporarily left unwatered and fall directly into the slag car 10.

[0036] The above description is only a preferred embodiment of the present utility model and is not limited thereto. Any modifications made within the scope of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for dewatering coarse slag from coal-water slurry gasification, characterized in that, The slag remover (1) is connected to the coarse slag feed hopper (2). The coarse slag feed hopper (2) is connected to the vibrating screen (5) through a three-way flap valve (4). The vibrating screen (5) is connected to the coarse slag discharge hopper (6). The bottom of the coarse slag discharge hopper (6) is connected to the slag car (10) through a slide plate unloading valve (7). The upper part of the coarse slag feed hopper (2) and the coarse slag discharge hopper (6) are equipped with steam coils (3). The steam coils (3) are arranged horizontally and in a top-in, bottom-out manner. The bottom side walls of the coarse slag feed hopper (2) and the coarse slag discharge hopper (6) are equipped with vibrators (12) to prevent slag blockage during the slag discharge process. The dewatering screen plate at the bottom of the vibrating screen has a 2-5° inclination angle to increase the coarse slag dewatering residence time. The connection between the end of the vibrating screen (5) and the coarse slag discharge hopper (6) has a 10-15° inclination angle, so that the coarse slag slides from the front end of the vibrating screen into the coarse slag discharge hopper (6).

2. The coarse slag dewatering device for coal-water slurry gasification according to claim 1, characterized in that, The top of the coarse slag feed silo (2) is connected to the induced draft fan (8) through a pipe. The induced draft fan (8) discharges air in one direction and is connected to the slag remover (1) through a condensation pipe in the other direction.

3. The coarse slag dewatering device for coal-water slurry gasification according to claim 1, characterized in that, The top of the coarse slag discharge hopper (6) is connected to the exhaust fan (9). The exhaust fan (9) discharges air in one direction and is connected to the slag remover (1) through the condensate pipe in the other direction.

4. The coarse slag dewatering device for coal-water slurry gasification according to claim 1, characterized in that, The coarse slag feed hopper (2) is also connected to the slag car (10) via a three-way flap valve (4).

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