CN-121988152-A - CO recovery2Intelligent carbonization device and carbonization method for solid wastes

Abstract

The invention relates to the technical field of industrial solid waste recycling, and discloses an intelligent carbonization device and a carbonization method for recycling CO 2 and solid waste, wherein the intelligent carbonization device comprises a tail gas treatment system, a gas-solid separation unit, a fly ash bin and a gas separation unit, wherein the gas-solid separation unit is used for receiving tail gas of a power plant and separating the tail gas of the power plant into gas and solid, the separated solid enters the fly ash bin, and the separated gas enters the gas separation unit; the system comprises a multifunctional carbonization reaction kettle, a coal ash bin, a gas separation unit, an intelligent regulation system and a control system, wherein the coal ash bin and the gas separation unit respectively convey CO2, N2 and coal ash into the multifunctional carbonization reaction kettle, the coal ash is carbonized and modified in the multifunctional carbonization reaction kettle, and the intelligent regulation system is used for monitoring and regulating a plurality of parameters in the carbonization reaction process. The invention has simple process and high intelligent degree, can be directly connected into the tail gas system of the power plant, effectively solves the problems of low activity, control lag in carbonization process and the like of the traditional fly ash, and improves carbonization efficiency and product value.

Inventors

• ZHANG LU
• ZHANG JIARUI
• LI HUI
• WANG YAN
• YUAN XINGWEI
• YUAN JUN
• LIU LALA
• YANG KANG

Assignees

• 西安建筑科技大学

Dates

Publication Date

20260508

Application Date

20260211

Claims (10)

1. 1. Retrieve intelligent carbonization device of CO 2 and solid useless, its characterized in that includes: The tail gas treatment system comprises a gas-solid separation unit, a fly ash bin (4) and a gas separation unit (5), wherein the gas-solid separation unit is used for receiving the tail gas of the power plant and separating the tail gas of the power plant into gas and solid, the separated solid enters the fly ash bin (4), and the separated gas enters the gas separation unit (5); The coal ash bin (4) and the gas separation unit (5) respectively convey CO 2 、N 2 and coal ash into the multifunctional carbonization reaction kettle (10), and the coal ash is carbonized and modified in the multifunctional carbonization reaction kettle (10); And the intelligent regulation and control system is used for monitoring and adjusting a plurality of parameters in the carbonization reaction process.
2. 2. The intelligent carbonization device for recycling CO 2 and solid waste according to claim 1, wherein the gas-solid separation unit comprises a supercritical conversion/mixing unit (1), a supercritical activator (2) and a supercritical centrifugal separator (3) which are sequentially communicated, the supercritical conversion/mixing unit (1) is used for receiving tail gas of a power plant, and the fly ash bin (4) and the gas separation unit (5) are respectively communicated with the output end of the supercritical centrifugal separator (3).
3. 3. The intelligent carbonization device for recovering CO 2 and solid waste according to claim 2, wherein the supercritical conversion/mixing unit (1) comprises an exhaust gas buffer tank, a main heater and a supercritical homogenizing mixer which are sequentially connected, and a multistage serial compressor is arranged in the main heater.
4. 4. The intelligent carbonization device and the carbonization method for recycling CO 2 and solid wastes according to claim 2, wherein an ultrasonic cavitation generator and a precise injection system are arranged in the supercritical activator.
5. 5. The intelligent carbonization device for recycling CO 2 and solid wastes, which is characterized in that a CO 2 air inlet (6), an inert gas air inlet (7) and an air outlet (9) are formed in the multifunctional carbonization reaction kettle (10), the CO 2 air inlet (6) and the inert gas air inlet (7) are respectively communicated with the gas separation unit (5), and a stirring and scraping integrated device (8) is arranged in the multifunctional carbonization reaction kettle (10).
6. 6. The intelligent carbonization device for recycling CO 2 and solid waste is characterized in that the gas separation unit (5) comprises a decompression flash tank, a low-temperature rectifier is connected to the tail end of the decompression flash tank, a CO 2 storage tank and an N 2 storage tank are connected to the low-temperature rectifier, the CO 2 storage tank and the N 2 storage tank are respectively used for storing CO 2 and N 2 , the CO 2 storage tank is communicated with the CO 2 air inlet (6), and the N 2 storage tank is communicated with the inert gas air inlet (7).
7. 7. The intelligent carbonization device for recycling CO 2 and solid waste, as set forth in claim 1, wherein the intelligent regulation system comprises an acoustic emission sensor array (13), an isothermal calorimeter (14), an integrated temperature acquisition control device (15), a pressure sensor (16) and a heat flow sensor (18) which are installed on the multifunctional carbonization reaction kettle (10), wherein the acoustic emission sensor array (13), the isothermal calorimeter (14), the integrated temperature acquisition control device (15), the pressure sensor (16) and the heat flow sensor (18) are respectively electrically connected with the intelligent regulation system (19).
8. 8. The intelligent carbonization device for recycling CO 2 and solid wastes, which is characterized in that a discharge port (17) is formed in the side wall of the multifunctional carbonization reaction kettle (10), and a discharge cooling device (11) is arranged on the discharge port (17).
9. 9. The intelligent carbonization device for recycling CO 2 and solid wastes according to claim 8, wherein the stirring and scraping integrated device (8) comprises a stirring module and a scraping module, the stirring module is used for stirring materials, and the scraping module is used for conveying the stirring materials to the discharging cooling device (11).
10. 10. A carbonization method for recovering CO 2 and solid waste, which is suitable for an intelligent carbonization device for recovering CO 2 and solid waste according to claim 1, and is characterized by comprising the following steps: Introducing the tail gas of the power plant into a gas-solid separation unit for gas-solid separation, conveying the separated solids into a fly ash bin (4), conveying the separated gas into a gas separation unit (5), and separating the gas through the gas separation unit (5) to obtain CO 2 and N 2 ; Delivering the separated solid fly ash to a multifunctional carbonization reaction kettle (10), introducing N 2 to replace air, and then introducing CO 2 to carry out carbonization reaction; And (3) monitoring and adjusting the reaction conditions in real time through an intelligent regulation system, stopping the reaction after the carbonization rate reaches the standard, and discharging to obtain a carbonized product.

Description

Intelligent carbonization device and carbonization method for recycling CO 2 and solid wastes Technical Field The invention relates to the technical field of industrial solid waste recycling, in particular to an intelligent carbonization device and a carbonization method for recycling CO 2 and solid waste. Background In the current stage, the coal-fired power plant occupies a large proportion, and the high-calcium fly ash (HCFA) is an industrial byproduct generated by the coal-fired power plant, and has certain gelling activity because of the high free calcium oxide (f-CaO) and active silicon-aluminum components, and can be used as an auxiliary gelling material for cement and concrete. However, the carbonization activity of the fly ash obtained by the electrostatic precipitator (ESP) technology is low, and free calcium oxide (f-CaO) in the fly ash is easy to react with water to generate calcium hydroxide, so that the volume expansion is caused, the stability problem of concrete can be possibly caused, and the wide application of the fly ash in the construction material field is limited. The carbonization activity of the fly ash is improved by a supercritical activation device, so that activated fly ash is obtained, and simultaneously the carbonization maintenance technology is assisted, so that active components (such as Ca (OH) 2, C-S-H and the like) in the fly ash can be utilized to react to generate stable calcium carbonate (CaCO 3) and silica gel, thereby not only solidifying CO 2, but also improving the volume stability and mechanical property of the fly ash. The dry carbonization maintenance technology directly carbonizes the high-calcium fly ash by controlling the environmental humidity, the concentration of CO 2 and the reaction temperature, and has the advantages of low energy consumption, high reaction speed, no need of water resources and the like. Therefore, an intelligent carbonization device and a carbonization method for recycling CO 2 and solid waste are needed to solve the above problems. Disclosure of Invention The invention aims to provide an intelligent carbonization device and a carbonization method for recycling CO 2 and solid wastes, so as to solve the problems in the prior art. In order to achieve the above purpose, the invention provides the following scheme that the intelligent carbonization device for recycling CO 2 and solid waste comprises: The tail gas treatment system comprises a gas-solid separation unit, a fly ash bin and a gas separation unit, wherein the gas-solid separation unit is used for receiving the tail gas of the power plant and separating the tail gas of the power plant into gas and solid, the separated solid enters the fly ash bin, and the separated gas enters the gas separation unit; The coal ash bin and the gas separation unit respectively convey CO 2、N2 and coal ash into the multifunctional carbonization reaction kettle, and the coal ash is carbonized and modified in the multifunctional carbonization reaction kettle; And the intelligent regulation and control system is used for monitoring and adjusting a plurality of parameters in the carbonization reaction process. Preferably, the gas-solid separation unit comprises a supercritical conversion/mixing unit, a supercritical activator and a supercritical centrifugal separator which are sequentially communicated, wherein the supercritical conversion/mixing unit is used for receiving tail gas of a power plant, and the fly ash bin and the gas separation unit are respectively communicated with the output end of the supercritical centrifugal separator. Preferably, the supercritical conversion/mixing unit comprises a tail gas buffer tank, a main heater and a supercritical homogenizing mixer which are sequentially connected, wherein a multistage serial compressor is arranged in the main heater. Preferably, an ultrasonic cavitation generator and a precision injection system are arranged in the supercritical activator. Preferably, the multifunctional carbonization reaction kettle is provided with a CO 2 air inlet, an inert gas air inlet and an air outlet, the CO 2 air inlet and the inert gas air inlet are respectively communicated with the gas separation unit, and the multifunctional carbonization reaction kettle is internally provided with a stirring and scraping integrated device. Preferably, the gas separation unit comprises a decompression flash tank, a low-temperature rectifier is connected to the tail end of the decompression flash tank, a CO 2 storage tank and an N 2 storage tank are connected to the low-temperature rectifier, the CO 2 storage tank and the N 2 storage tank are respectively used for storing CO 2 and N 2, the CO 2 storage tank is communicated with the CO 2 air inlet, and the N 2 is communicated with the inert gas air inlet. Preferably, the intelligent regulation and control system comprises an acoustic emission sensor array, an isothermal calorimeter, an integrated temperature acquisition control dev