CN207062213U - A kind of gasification of biomass coupling coal fired power generation gasification gas utilizes system - Google Patents

Abstract

The utility model discloses a biomass gasification coupled coal-fired power generation electrified gas utilization system, comprising a gasification gas heat exchanger, a start-up boiler heat exchanger and an induced draft fan; a gasification gas heat exchanger, a start-up boiler heat exchanger and The induced draft fan is connected through pipelines in turn; the gasification gas heat exchanger is installed in the gasification gas pipeline, and the induced draft fan is installed at the right end of the boiler heat exchanger; The gas inlet pipe and the gasifier hot flue gas inlet pipe are connected to the gasifier flue gas outlet pipe; the start-up furnace heat exchanger is connected to cold water through the upper cold water pipe interface, and the start-up furnace heat exchanger is also equipped with a water vapor outlet The water vapor outlet pipe is connected to the auxiliary steam header of the unit. The advantage of the utility model is that through the coupling of the gasification gas heat exchanger and the starting boiler heat exchanger, water vapor can be generated without an external heat source when starting the boiler heat exchanger, reducing unit energy consumption, saving resources, and reducing operating costs , improved efficiency.

Description

A biomass gasification coupled coal-fired power generation electrified gas utilization system

technical field

The utility model relates to a heat utilization system, in particular to a biomass gasification coupled coal-fired power generation electrified gas utilization system.

Background technique

The gasification gas temperature at the outlet of the biomass gasification coupling coal-fired power generation biomass gasification furnace is about 700-750 ° C. Considering the temperature that the gas transmission pipeline, valves and accessories can withstand, the gasification gas must be cooled first. At present, the way of heating boiler condensate water is commonly used to utilize the sensible heat of gasification.

At present, when a conventional coal-fired power plant is cold-started, it must first ignite to generate high-temperature water vapor through the start-up boiler heat exchanger, and provide auxiliary steam to the auxiliary steam header of the unit.

At present, the conventional way to start the boiler heat exchanger is to use fuel oil or natural gas. The process of providing auxiliary steam to the auxiliary steam header of the unit requires continuous consumption of a large amount of fuel oil or natural gas, which not only consumes natural resources, but also increases operating costs.

Utility model content

The purpose of this utility model is to provide a biomass gasification coupled coal-fired power generation that can generate water vapor without an external heat source when starting the boiler heat exchanger through the coupling of the gasification gas heat exchanger and the boiler heat exchanger gas utilization system.

In order to achieve the above object, the utility model provides the following technical solutions:

A biomass gasification coupled coal-fired power generation electrification gas utilization system, comprising a gasification gas heat exchanger, a start-up boiler heat exchanger and an induced draft fan; the gasification gas heat exchanger, a start-up boiler heat exchanger and an induced draft fan are sequentially Connected through pipelines; the gasification gas heat exchanger is set in the gasification gas pipeline, and the induced draft fan is installed at the right end of the boiler heat exchanger; the gasification gas heat exchanger is provided with a normal temperature air inlet and a gasification furnace The incoming hot flue gas inlet pipe, the hot incoming flue gas inlet pipe of the gasifier is connected to the gasifier flue gas outlet pipe; the starting furnace heat exchanger is connected to cold water through the upper cold water pipe interface, and the starting furnace heat exchanger A water vapor outlet pipe is also arranged on the top, and the water vapor outlet pipe is connected to the auxiliary steam header of the unit.

As a further solution of the utility model: the gasification gas heat exchanger, the start-up boiler heat exchanger and the induced draft fan are all surface heat exchangers.

As a further solution of the utility model: the start-up boiler heat exchanger is an independent device for independent heat exchange between air and water.

Compared with the prior art, the beneficial effect of the utility model is that the utility model forms hot air in the gasification gas heat exchanger through the coupling of the gasification gas heat exchanger and the start-up boiler heat exchanger, and passes through the hot The air heats the cold water in the boiler heat exchanger to form high-temperature water vapor to provide auxiliary steam to the auxiliary steam header of the power plant. When the boiler heat exchanger is started, water vapor can be generated without an external heat source, which reduces the energy consumption of the unit and saves resources. Reduced operating costs and improved efficiency.

Description of drawings

Figure 1 is a schematic structural diagram of a biomass gasification coupled coal-fired power generation electrified gas utilization system.

In the figure: 1- gasification gas heat exchanger, 2- start-up boiler heat exchanger, 3- induced draft fan, 4- unit auxiliary steam header, 11- normal temperature air inlet, 12- gasifier heat flue gas inlet pipe , 21-cold water pipe interface, 22-water vapor outlet pipe.

Detailed ways

The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

Please refer to Figure 1, a biomass gasification coupled coal-fired power generation electrified gas utilization system, including a gasification gas heat exchanger 1, a boiler start-up heat exchanger 2 and an induced draft fan 3; the gasification gas heat exchanger 1, The start-up boiler heat exchanger 2 and the induced draft fan 3 are connected through pipelines in turn; the gasification gas heat exchanger 1 is arranged in the gasification gas pipeline, the induced draft fan 3 is installed at the right end of the start-up boiler heat exchanger 2, and the induced draft fan 3 The suction gas flows from the gasification gas heat exchanger 1 into the start-up boiler heat exchanger 2; the gasification gas heat exchanger 1 is provided with a normal temperature air inlet 11 and a gasification furnace hot flue gas inlet pipe 12, the gasification gas The hot flue gas inlet pipe 12 from the gasification furnace is connected to the flue gas outlet pipe of the gasification furnace; normal temperature air enters the gasification gas heat exchanger 1 through the normal temperature air inlet 11 and is heated by the gasification furnace flue gas to form hot air. It is transmitted to the start-up furnace heat exchanger 2 through pipelines, and the start-up furnace heat exchanger 2 is connected to cold water through the cold water pipe interface 21 on it, and the cold water is heated by hot air in the start-up heat exchanger 2 to form water vapor. Connect to the auxiliary steam header 4 of the unit through the water vapor outlet pipe 22 on the start-up furnace heat exchanger 2;

The gasification gas heat exchanger 1, the start-up boiler heat exchanger 2 and the induced draft fan 3 are all surface heat exchangers.

The start-up boiler heat exchanger 2 is an independent device for independent heat exchange between air and water.

The working principle of the utility model is:

The large hollow arrow on the far left in the figure shows the flow direction of normal temperature air. The normal temperature air enters the gasification gas heat exchanger 1 in the gasification gas pipeline through the normal temperature air inlet 11, and flows into the gasification gas heat exchanger 1 through the gasification gas heat exchanger 1. The hot flue gas from the gasification furnace is exchanged to form hot air, and the hot air after heat exchange enters the start-up boiler heat exchanger 2 through the induced draft fan 3, and the start-up boiler heat exchanger 2 generates high-temperature water vapor under the heating of the hot air. The high-temperature steam is connected to the auxiliary steam header of the unit through the steam outlet pipe 22 of the start-up boiler heat exchanger 2, and the start-up boiler heat exchanger 2 generates high-temperature water vapor under the heating of the hot air to provide auxiliary steam for the auxiliary steam header of the unit. Reduced unit energy consumption. The utility model can adjust the heat exchange effect of the boiler heater 2 by the output of the induced draft fan 3 .

The preferred implementation of this patent has been described in detail above, but this patent is not limited to the above-mentioned implementation, and within the knowledge of those of ordinary skill in the art, it can also be made without departing from the purpose of this patent. Variations.

Claims (3)

1. A biomass gasification coupled coal-fired power generation electrified gas utilization system, characterized in that it comprises a gasification gas heat exchanger (1), a boiler heat exchanger (2) and an induced draft fan (3); The gasification heat exchanger (1), the start-up boiler heat exchanger (2) and the induced draft fan (3) are sequentially connected through pipelines; the gasification gas heat exchanger (1) is arranged in the gasification gas pipeline, and the induced draft fan (3) Installed on the right end of the start-up boiler heat exchanger (2); the gasification gas heat exchanger (1) is provided with a normal temperature air inlet (11) and a gasification furnace hot flue gas inlet pipe (12), so The hot flue gas inlet pipe (12) of the gasifier is connected to the flue gas outlet pipe of the gasifier; the start-up furnace heat exchanger (2) is connected to cold water through the cold water pipe interface (21) on it, and the start-up furnace heat exchange A water vapor outlet pipe (22) is also arranged on the device (2), and the water vapor outlet pipe (22) is connected to the auxiliary steam header (4) of the unit. 2. The biomass gasification coupling coal-fired power generation electrification gas utilization system according to claim 1, characterized in that the gasification gas heat exchanger (1), the start-up boiler heat exchanger (2) and the induced draft fan ( 3) Both are surface heat exchangers. 3. The biomass gasification coupled coal-fired power generation electrification gas utilization system according to claim 1, characterized in that the start-up boiler heat exchanger (2) is an independent device for independent heat exchange between air and water.