CN201865710U - Coal chemical-looping combustion power generating device - Google Patents

Abstract

The utility model discloses a coal chemical-looping combustion power generating device, which is applicable to occasions needing carbon dioxide absorption in power generation with coal. The coal chemical-looping combustion power generating device mainly comprises a coal gasifier, a coal cyclone separator, a reduction device, a reduction device cyclone separator, an oxidizer, an oxidizer cyclone separator, a gas compressor, a primary turbine, a saturator, a secondary turbine, a condenser and a generator unit. Coal is gasified in the gasifier into CO (carbon oxide) and CH4 (methane), the CO and the CH4 are sent into the reduction device to react with NiO (nickel oxide) to generate high-temperature high-pressure pure CO2 (carbon dioxide), and the pure CO2 works in the primary turbine to drive a generator to generate electricity. Gas from the primary turbine is condensed by the condenser into pure CO2 and water, and the CO2 is recycled. The coal chemical-looping combustion power generating device adopts a flameless combustion technique to separate the pure CO2 by means of chemical-looping combustion, and accordingly CO2 emission is controlled effectively.

Description

Coal Chemical Looping Combustion Power Plant

Technical field:

The utility model relates to a coal chemical chain combustion power generation device, which is used in occasions where carbon dioxide emissions need to be reduced for power generation.

Background technique:

Global warming is mainly caused by the intensification of the earth's greenhouse effect due to the massive emission of greenhouse gases, mainly CO ₂ . Controlling and reducing _CO2 emissions plays an important role in addressing the effects of atmospheric greenhouse effect and global warming. _China is a major CO ₂ emitter, accounting for about 1/5 of the world's total CO ₂ emissions, most of which are produced by coal combustion. For a long period of time in the future, China's coal-based energy pattern will not change, and coal consumption will continue to grow. In the production of energy mainly based on fossil fuels, _CO2 emissions account for about Controlling _CO2 emissions from coal-fired production plays a significant role in solving the atmospheric greenhouse effect and global _warming . However, the separation of _CO2 from the tail gas of coal-fired boilers is very energy-intensive.

Based on this, the applicant made this utility model, which aims to separate pure CO ₂ by using flameless combustion and chemical chain combustion, so as to effectively control CO ₂ emissions.

Utility model content:

In view of the technical problems to be solved above, the first aspect of the utility model is to provide a coal chemical looping combustion power generation device, which is characterized in that it includes a coal gasifier, the coal gasifier is connected with the air separator, and the first cyclone separator It is connected to the coal gasifier in circulation, the reducer is connected to the first cyclone separator, the second cyclone separator is connected to the reducer in circulation, the reducer is built with NiO, the oxidizer is connected to the outlet of the reducer, and the third cyclone separator It is connected to the oxidizer cycle, the reducer is connected to the outlet of the oxidizer, the first-stage turbine, the saturator, and the second-stage turbine are respectively connected to the compressor, the first-stage turbine is connected to the second cyclone separator, and the condenser is connected to the first-stage turbine. The oxidizer is connected with the saturator, the second-stage turbine is connected with the third cyclone separator, and the generator is connected with the first-stage turbine and the second-stage turbine respectively.

The beneficial effects of the utility model are as follows: the utility model adopts the air to be sent into the coal gasifier together with the coal after passing through the air separator, and the coal is gasified into CO and CH ₄ in the gasifier, and then sent into the reducer. React with NiO inside to generate high-temperature and high-pressure pure _CO2 gas, which works in the first-stage turbine to drive the generator to generate electricity. The gas from the first-stage turbine is condensed into pure _CO2 gas and water through the condenser, and the pure _CO2 gas is added receive. The Ni generated in the reducer is sent back to the oxidizer, and the air compressed by the compressor and the saturator is sent to the oxidizer at the same time, and an oxidation reaction occurs to oxidize Ni into NiO, and the _N2 gas from the cyclone separator of the oxidizer is sent to Work in the secondary turbine to drive the generator to generate electricity. The utility model is a flameless combustion technology, which separates pure CO ₂ through chemical chain combustion, thereby effectively controlling CO ₂ emission.

Below in conjunction with accompanying drawing 1 and specific embodiment, the utility model is further described in detail, and the following examples are explanations of the utility model, but the utility model is not limited to the following examples.

Description of drawings:

Fig. 1 is a structural schematic diagram of the coal chemical looping combustion power generation device of the present invention.

Detailed ways:

As shown in Figure 1, the coal chemical chain combustion power generation device of the present utility model comprises a coal gasifier 1, the coal gasifier 1 is connected with the air separator 13, the cyclone separator 2 is connected with the coal gasifier 1 in circulation, and the reducer 3 is connected with the coal gasifier 1. The cyclone separator 2 is connected, the cyclone separator 4 is connected to the reducer 3 in a cycle, the reducer 3 is built with NiO, the oxidizer 12 is connected to the discharge port of the reducer 3, the cyclone separator 11 is connected to the oxidizer 12 in a cycle, and the reducer 3 is connected to the outlet of the oxidizer 12, the primary turbine 7, the saturator 6, and the secondary turbine 10 are respectively connected to the compressor 5, the primary turbine 7 is connected to the cyclone separator 4, and the condenser 8 is connected to the primary turbine 7 The oxidizer 12 is connected with the saturator 6, the secondary turbine 10 is connected with the cyclone separator 11, and the generator 9 is connected with the primary turbine 7 and the secondary turbine 10 respectively.

As shown in Figure 1, the coal chemical chain combustion power generation process of the utility model is as follows:

1. After passing through the air separator 13, the air is sent into the coal gasifier 1 together with the coal. The coal gasifier 1 and the cyclone separator 2 form a circulating fluidized bed. The coal is gasified into CO, CH ₄ , and slag in the gasifier 1. Discharged from the lower part of the gasifier 1;

2. The CO and CH ₄ generated in the coal gasifier 1 are sent to the reducer 3, and the reducer 3 and the cyclone separator 4 form a circulating fluidized bed. In the reducer 3, CO, CH ₄ and NiO react to generate high temperature and high pressure Pure _CO2 gas, the reaction equation is:

CO+ _CH4 +NiO→ _CO2 + _H2O +Ni (1)

3. The high-temperature and high-pressure pure _CO2 gas generated by the reaction in the reducer 3 is sent to the first-stage turbine 7 through the cyclone separator 4 to do work, and drives the generator 9 to generate electricity. The gas coming out of the first-stage turbine 7 is condensed 8 is condensed into pure CO ₂ gas and water, and the pure CO ₂ gas is recovered.

4. The Ni generated in the reducer 3 is sent to the oxidizer 12, and the air compressed by the compressor 5 and the saturator 6 is sent to the oxidizer 12 at the same time, and the oxidizer 12 and the cyclone separator 11 form a circulating fluidization bed, an oxidation reaction occurs to oxidize Ni to NiO, and the generated NiO is sent to the reducer 3 for recycling. The reaction equation is:

Ni+O ₂ →NiO (2)

5. The _N2 gas coming out of the cyclone separator 11 is sent to the secondary turbine 10 to do work, driving the generator 9 to generate electricity.

Claims (1)

1. coal chemistry chain combustion power generation device, it is characterized in that: comprise coal gasifier, coal gasifier links to each other with air splitter, first cyclone separator is connected with the coal gasifier circulation, reductor links to each other with first cyclone separator, second cyclone separator is connected with the reductor circulation, reductor is built-in with NiO, oxidator links to each other with the discharge port of reductor, the 3rd cyclone separator is connected with the oxidator circulation, reductor links to each other with the discharge port of oxidator, a stage turbine, saturator, the two-stage turbine machine links to each other with compressor respectively, and a stage turbine links to each other with second cyclone separator, condenser links to each other with a stage turbine, oxidator links to each other with saturator, and the two-stage turbine machine links to each other with the 3rd cyclone separator, generator respectively with a stage turbine, the two-stage turbine machine links to each other.

Images