Gasifying agent strongly-rotating pulverized coal gasifying device and gasifying method

Abstract

The invention relates to a pulverized coal gasifying device and gasifying method, in particular to a gasifying agent strongly-rotating pulverized coal gasifying device and gasifying method. The invention aims at solving the problems that cinders are not uniformly hung on the wall surface of the gasifier in the prior art and the inner wall surface of the gasifier is burned out and corroded. A water-cooled wall of the device is installed in a gasifier body, the water-cooled wall consists of a plurality of vertical circular pipes, the water-cooled wall forms a rotary body gasifying hearth, a cinder basin is arranged at the bottom portion of the gasifier body, a synthesis gas passage is inserted into the lower portion of the gasifier body, a gasifying agent spray outlet is formed in the upper portion of the gasifier body, the gasifying agent spray outlet is inserted into the gasifying hearth along the tangential direction of the gasifying hearth, a pulverized coal burner is installed at the top portion of the gasifier body, the axis of the pulverized coal burner and the axis of the gasifying hearth are overlapped, and a pulverized coal passage with an annular cross section is arranged in the pulverized coal burner. The gasifying agent strongly-rotating pulverized coal gasifying device and gasifying method are used for the field of coal gasification.

Description

technical field

[0001] The invention relates to a pulverized coal gasification device and a gasification method, in particular to a pulverized coal gasification device and a gasification method with strong rotation of a gasification agent, and belongs to the field of coal gasification. Background technique

[0002] Coal gasification technology is an efficient and clean clean coal technology. The current coal gasification technology is mainly divided into four categories: moving bed gasification, fluidized bed gasification, entrained flow gasification and molten bed gasification. Among them, entrained bed gasification technology has become the main development direction of coal gasification technology due to its advantages of high gasification intensity, large production capacity and high carbon conversion rate. Entrained bed gasification has two main features. One is the high operating temperature, about 1300-1600°C. After the pulverized coal enters the furnace, liquid slag...

Examples

specific Embodiment approach 1

[0022] Specific implementation mode one: combine figure 1 with figure 2 Describe this embodiment mode, a gasification agent strong rotary pulverized coal gasification device described in this embodiment includes a pulverized coal burner 1, a gasification furnace body 2, a water wall 4, a syngas channel 5 and a gasification agent nozzle 7, the gasification agent The gasification furnace body 2 is composed of a hemisphere and a cylinder. The water-cooled wall 4 is installed in the gasification furnace body 2. The water-cooled wall 4 is composed of a plurality of vertical circular tubes. The water-cooled wall 4 encloses a rotary gasification furnace 3. The bottom of the gasification furnace body 2 is provided with a slag pool 6, the syngas channel 5 is inserted in the lower part of the gasification furnace body 2, the gasification agent nozzle 7 is arranged on the upper part of the gasification furnace body 2, and the gasification agent nozzle 7 is arranged along the The tangen...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination figure 1 with figure 2 To illustrate this embodiment, a swirl vane 9 is provided at the fire inlet end of a pulverized coal channel 8 of a gasification agent strong rotary pulverized coal gasification device in this embodiment. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0024] Specific implementation mode three: combination figure 1 with figure 2 Describe this embodiment, this embodiment is the specific steps of described a kind of strong rotary pulverized coal gasification method of gasification agent as follows:

[0025] Step 1. Set the internal pressure of the gasification furnace 3 to 0.1-4 MPa, and the operating temperature of the gasification furnace 3 to be 1250-1600°C;

[0026] Step 2. The dry coal powder at a temperature of 25-100°C is carried by nitrogen or carbon dioxide and sent into the furnace 3 through the coal powder channel 8 on the coal powder burner 1 in a swirling flow, and the volume fraction of the coal powder is 1%. ~25%, forming a rotating and downward pulverized coal flow in the furnace top area;

[0027] Step 3: After the pulverized coal airflow comes into contact with the high-temperature synthesis gas entrained in the central recirculation zone, it is ignited by it, and burns at the top of the furnace 3 to form ...

technical field

[0001] The invention relates to a pulverized coal gasification device and a gasification method, in particular to a pulverized coal gasification device and a gasification method with strong rotation of a gasification agent, and belongs to the field of coal gasification. Background technique

[0002] Coal gasification technology is an efficient and clean clean coal technology. The current coal gasification technology is mainly divided into four categories: moving bed gasification, fluidized bed gasification, entrained flow gasification and molten bed gasification. Among them, entrained bed gasification technology has become the main development direction of coal gasification technology due to its advantages of high gasification intensity, large production capacity and high carbon conversion rate. Entrained bed gasification has two main features. One is the high operating temperature, about 1300-1600°C. After the pulverized coal enters the furnace, liquid slag...

Examples

specific Embodiment approach 1

[0022] Specific implementation mode one: combine figure 1 with figure 2 Describe this embodiment mode, a gasification agent strong rotary pulverized coal gasification device described in this embodiment includes a pulverized coal burner 1, a gasification furnace body 2, a water wall 4, a syngas channel 5 and a gasification agent nozzle 7, the gasification agent The gasification furnace body 2 is composed of a hemisphere and a cylinder. The water-cooled wall 4 is installed in the gasification furnace body 2. The water-cooled wall 4 is composed of a plurality of vertical circular tubes. The water-cooled wall 4 encloses a rotary gasification furnace 3. The bottom of the gasification furnace body 2 is provided with a slag pool 6, the syngas channel 5 is inserted in the lower part of the gasification furnace body 2, the gasification agent nozzle 7 is arranged on the upper part of the gasification furnace body 2, and the gasification agent nozzle 7 is arranged along the The tangen...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination figure 1 with figure 2 To illustrate this embodiment, a swirl vane 9 is provided at the fire inlet end of a pulverized coal channel 8 of a gasification agent strong rotary pulverized coal gasification device in this embodiment. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0024] Specific implementation mode three: combination figure 1 with figure 2 Describe this embodiment, this embodiment is the specific steps of described a kind of strong rotary pulverized coal gasification method of gasification agent as follows:

[0025] Step 1. Set the internal pressure of the gasification furnace 3 to 0.1-4 MPa, and the operating temperature of the gasification furnace 3 to be 1250-1600°C;

[0026] Step 2. The dry coal powder at a temperature of 25-100°C is carried by nitrogen or carbon dioxide and sent into the furnace 3 through the coal powder channel 8 on the coal powder burner 1 in a swirling flow, and the volume fraction of the coal powder is 1%. ~25%, forming a rotating and downward pulverized coal flow in the furnace top area;

[0027] Step 3: After the pulverized coal airflow comes into contact with the high-temperature synthesis gas entrained in the central recirculation zone, it is ignited by it, and burns at the top of the furnace 3 to form ...

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