Hot nitrogen gas stripping dehydration system for coarse slag

Abstract

The utility model relates to the technical field of coal water slurry gasification, and provides a coarse slag hot nitrogen gas stripping dehydration system which comprises a high-temperature nitrogen supply device and a conical slag hopper (1), a valve (6) is arranged at a discharge port of the conical slag hopper (1), a plurality of nitrogen inlet pipes (2) communicated with the inner space of the conical slag hopper (1) are arranged on the outer side wall of the conical slag hopper (1), and the nitrogen inlet pipes (2) are communicated with the inner space of the conical slag hopper (1). Each nitrogen inlet pipe (2) is connected with the high-temperature nitrogen supply device; and an anti-blocking ventilation plate (3) is arranged on the inner side wall of the conical slag hopper (1). By introducing high-temperature nitrogen into the conical slag hopper, water in the coarse slag can be fully stripped, the water content in the coarse slag is reduced, and black water is effectively avoided, so that the adverse effect on the environment in the coarse slag transportation and treatment process is reduced, and the treatment cost of the coarse slag is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of water-coal slurry gasification, and more specifically, to a crude slag hot nitrogen gas stripping and dehydration system. Background Art

[0002] Coarse slag is the product of the reaction of coal slurry in the gasifier. After the coal slurry is fully burned in the gasifier, it falls into the slag water in the quenching chamber of the gasifier. After the pressure is released through the lock bucket, it falls into the slag pool of the slag scoop machine. It is then scooped up by the slag scoop machine and transported obliquely upward to the slag hopper, and finally loaded onto a truck for external processing.

[0003] Due to site limitations, the inclined dehydration section of the slag remover is designed to be short, resulting in the coarse slag having a moisture content that is too high, which can reach 55%-60%. Black water continuously flows out during the loading process, seriously affecting the environmentally friendly transportation roads and the surrounding environment, and failing to meet the emission standards required by environmental protection. In addition, the high moisture content of the coarse slag also increases the transportation and processing costs of the coarse slag. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a coarse slag hot nitrogen gas stripping and dehydration system to solve the technical problem of excessively high water content in the coarse slag in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a coarse slag hot nitrogen gas stripping dehydration system, comprising: a high-temperature nitrogen supply device and a conical slag bucket, the discharge port of the conical slag bucket is provided with a valve, the outer side wall of the conical slag bucket is provided with a plurality of nitrogen inlet pipes connected to the internal space of the conical slag bucket, and each of the nitrogen inlet pipes is connected to the high-temperature nitrogen supply device; the inner side wall of the conical slag bucket is provided with an anti-blocking ventilation plate.

[0006] In one embodiment, at least four nitrogen inlet pipes are arranged at equal arc distances.

[0007] In one embodiment, the inner side wall of the conical hopper is provided with mounting ribs, the anti-blocking ventilation plate is provided with folded edges, and the folded edges are connected to the mounting ribs by bolts.

[0008] In one embodiment, the anti-blocking ventilation plate is a metal plate.

[0009] In one embodiment, the metal plate is a metal wire mesh plate or a metal sintered mesh plate.

[0010] In one embodiment, the nitrogen temperature provided by the high temperature nitrogen supply device is 100-300°C.

[0011] In one embodiment, a gas collecting hood is arranged above the conical hopper, and the gas collecting hood is connected to an exhaust fan.

[0012] The beneficial effect of the coarse slag hot nitrogen gas stripping and dehydration system provided in the present application is that by introducing high-temperature nitrogen into the conical slag hopper, the moisture in the coarse slag can be fully stripped, the water content in the coarse slag can be reduced, and the generation of black water can be effectively avoided, thereby reducing the adverse impact on the environment during the transportation and treatment of the coarse slag and reducing the subsequent treatment cost of the coarse slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 A simplified structural schematic diagram of a conical slag bucket in a coarse slag hot nitrogen gas stripping and dehydration system provided in an embodiment of the present application;

[0015] Figure 2 This is a schematic plan view of an expanded conical slag bucket in the coarse slag hot nitrogen gas stripping and dehydration system provided in an embodiment of the present application.

[0016] Among them, the reference numerals in the figure are:

[0017] 1. Conical slag bucket; 2. Nitrogen inlet pipe; 3. Anti-blocking ventilation plate; 4. Mounting ribs; 5. Bolts; 6. Valve. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] like Figure 1-Figure 2 As shown, a crude slag hot nitrogen gas lift dehydration system provided in an embodiment of the present application is now described. The crude slag hot nitrogen gas lift dehydration system comprises: a high-temperature nitrogen supply device and a conical slag bucket 1, and the high-temperature nitrogen supply device and the conical slag bucket 1 are both existing equipment in the factory. The improvement of this embodiment is that the high-temperature nitrogen supply device and the conical slag bucket 1 are organically combined, and a valve 6 is added to the discharge port of the conical slag bucket 1. The valve 6 adopts an electric valve. When the transport vehicle has not reached the bottom of the conical slag bucket 1, the valve 6 is in a closed state; after the transport vehicle reaches the bottom of the conical slag bucket 1, the valve 6 is opened again, so that the crude slag in the conical slag bucket 1 automatically falls into the transport vehicle.

[0023] Among them, the outer wall of the conical slag bucket 1 is provided with a plurality of nitrogen inlet pipes 2 connected to the inner space of the conical slag bucket 1. At least four nitrogen inlet pipes 2 are provided, and the plurality of nitrogen inlet pipes 2 are arranged at equal arc distances to ensure that the heat distribution is relatively uniform, so that the coarse slag is heated relatively uniformly. The specific number of nitrogen inlet pipes 2 can be increased according to the size of the conical slag bucket 1. The nitrogen inlet pipes 2 can also be arranged in multiple circles up and down, which can effectively improve the efficiency of gas stripping and water removal, and the use of high-temperature nitrogen meets environmental protection requirements. Each nitrogen inlet pipe 2 is connected to a high-temperature nitrogen supply device, which is used to pass high-temperature nitrogen into the conical slag bucket 1. The temperature of the high-temperature nitrogen is 100-300°C, which can effectively take away the moisture in the coarse slag; the inner wall of the conical slag bucket 1 is provided with an anti-blocking ventilation plate 3. The anti-blocking ventilation plate 3 can prevent the coarse slag from blocking the nitrogen inlet pipe 2 on the one hand, and on the other hand, it can disperse the high-temperature nitrogen so that the high-temperature nitrogen is fully in contact with the coarse slag. In other embodiments, the gas outlet end of the nitrogen inlet pipe 2 is arranged downward, which can effectively prevent the coarse slag from entering the nitrogen inlet pipe 2.

[0024] Specifically, a plurality of mounting ribs 4 are provided on the inner wall of the conical hopper 1, and the mounting ribs 4 are welded inside the conical hopper 1. A plurality of through holes are provided on the mounting ribs 4 at intervals. The two side edges of the anti-blocking ventilation plate 3 are provided with folded edges facing upwards, and the folded edges are also provided with through holes. The folded edges are fixedly connected to the mounting ribs 4 by bolts 5, which facilitates the replacement and cleaning of the anti-blocking ventilation plate 3.

[0025] Specifically, the anti-blocking ventilation plate 3 is a metal plate, which also has a heat-conducting effect. Preferably, the metal plate is a metal wire mesh plate or a metal sintered mesh plate. A heat-insulating material can be added to the outer side of the conical hopper 1 to effectively prevent heat loss. A gas collection hood is arranged above the conical hopper 1, and the gas collection hood is connected to an exhaust fan, which is used to extract and collect nitrogen containing water vapor.

[0026] Valve 6 is closed, the slag scooping machine scoops up the coarse slag and conveys it obliquely upward to the conical slag bucket 1, and the high-temperature nitrogen enters the conical slag bucket 1 through the nitrogen inlet pipe 2. The high-temperature nitrogen fully contacts the coarse slag and fully lifts the moisture in the coarse slag, which is then extracted by the exhaust fan above, thereby achieving the purpose of reducing the moisture content of the coarse slag. The nitrogen is pollution-free and meets environmental protection requirements.

[0027] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A coarse slag hot nitrogen stripping dehydration system, characterized in that: include: A high-temperature nitrogen supply device and a conical slag bucket (1), wherein a valve (6) is provided at the discharge port of the conical slag bucket (1), a plurality of nitrogen inlet pipes (2) communicating with the internal space of the conical slag bucket (1) are provided on the outer side wall of the conical slag bucket (1), and each of the nitrogen inlet pipes (2) is connected to the high-temperature nitrogen supply device; and an anti-blocking ventilation plate (3) is provided on the inner side wall of the conical slag bucket (1).

2. The crude slag hot nitrogen stripping and dehydration system according to claim 1, characterized in that: At least four nitrogen inlet pipes (2) are arranged at equal arc distances.

3. The coarse slag hot nitrogen stripping and dehydration system according to claim 2, characterized in that: The inner wall of the conical hopper (1) is provided with a mounting rib (4), the anti-blocking ventilation plate (3) is provided with a folded edge, and the folded edge is connected to the mounting rib (4) by means of bolts (5).

4. The coarse slag hot nitrogen stripping and dehydration system according to claim 3, characterized in that: The anti-blocking ventilation plate (3) is a metal plate.

5. The coarse slag hot nitrogen stripping and dehydration system according to claim 4, characterized in that: The metal plate is a metal wire mesh plate or a metal sintered mesh plate.

6. The crude slag hot nitrogen stripping and dehydration system according to any one of claims 1 to 5, characterized in that: The nitrogen temperature provided by the high-temperature nitrogen supply device is 100-300°C.

7. The crude slag hot nitrogen stripping and dehydration system according to claim 6, characterized in that: An air gathering hood is arranged above the conical slag hopper (1), and the air gathering hood is connected to an exhaust fan.

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