CN110511787A - A new double fluidized bed device for hydrogen production from organic solid waste - Google Patents

Abstract

The invention discloses a novel double fluidized bed device for producing hydrogen from organic solid waste, comprising: a feeding mechanism, a gasification chamber, a bed material recovery circulator and a combustion chamber; the feeding mechanism is connected to the lower part of the gasification chamber through a feeding pipe The feed inlet and the upper part of the gasification chamber are connected to the bed material recovery circulator, the bed material recovery circulator is connected to the upper part of the combustion chamber, and the lower part of the combustion chamber is connected to the lower part of the gasification chamber through a communication pipe. The invention improves the hydrogen production rate, reduces the amount of tar produced, and improves the utilization rate of heat energy.

Description

A new double fluidized bed device for hydrogen production from organic solid waste

technical field

The invention relates to an organic solid waste recycling and harmless treatment device, in particular to a novel organic solid waste hydrogen production device.

Background technique

At present, the devices for producing hydrogen from organic solid waste are mainly fixed bed gasification and fluidized bed gasification. These devices have the following problems: 1. The hydrogen content in the gasification gas is low, generally only 10% to 20%. Purification of resource utilization is difficult and economical; 2. A large amount of tar is produced, which blocks subsequent processing equipment; 3. External heat sources are required to maintain gasification.

Contents of the invention

The purpose of the present invention is to provide a novel double-fluidized bed device for hydrogen production from organic solid waste, which can increase the hydrogen production rate, reduce the amount of tar produced, and improve the utilization rate of heat energy.

To achieve the above object, the present invention provides the following technical solutions:

A novel double fluidized bed device for hydrogen production from organic solid waste, characterized in that it includes: a feeding mechanism, a gasification chamber, a bed material recovery circulator and a combustion chamber; the feeding mechanism is connected to the lower part of the gasification chamber through a feeding pipe The feed port and the lower part of the gasification chamber are also connected to the lower part of the combustion chamber through an obliquely downward communication pipe; the upper part of the combustion chamber is connected to the upper part of the gasification chamber through a bed material recovery circulator; the bottom of the combustion chamber is connected to the blower; the bottom of the gasification chamber, the communication pipe The middle part is connected to the steam pipe; the connection between the bed material recovery circulator and the gasification chamber is connected to the steam pipe.

Preferably, the feeding mechanism includes a storage bin, and the storage bin is connected to the closed feeding bin A and the feeding bin B; the feeding bin A and the feeding bin B are connected to the lower feed port of the gasification chamber through a feeding pipe. By setting up two airtight feeding bins, the switching of feeding materials is realized, the airtightness of the feeding bins is ensured, and the gas generated in the gasification chamber is prevented from leaking from the feeding bins. Material interruption affects the thermal cycle of the entire equipment.

Preferably, the discharge port of the storage bin, the feed port and the discharge port of the feed bin A and the feed bin B are all equipped with electric valves, which is convenient for automatic control and switching of feeding and discharging.

Preferably, a gas analyzer is installed at the gas outlet on the top of the gasification chamber to monitor the gas outlet on-line.

Preferably, a flue gas monitor is installed at the flue gas port on the top of the combustion chamber to monitor the flue gas condition online.

Preferably, a plurality of triangular baffles are arranged on the inner side wall of the gasification chamber, which can block part of the tar generated in the gasification chamber, and the tar condenses along the triangular baffles and side walls.

Preferably, olivine is used as the bed material in the gasification chamber and combustion chamber.

Preferably, both the gasification chamber and the combustion chamber are equipped with pressure monitors and temperature monitors, which can monitor the pressure and temperature of the gasification chamber and combustion chamber on-line.

The invention can increase the content of hydrogen in the gasification gas (up to 40%), reduce the amount of tar produced, and at the same time, the whole equipment only needs to use natural gas as a heat source when it is started, and no heat source needs to be added after the operation is balanced. First, the organic solid waste is quantitatively fed to the gasification hydrogen production chamber through the feeding mechanism. Oxygen-free gasification generates a mixed gas with high hydrogen content. At the same time, part of the tar is blocked by the baffle of the gasification chamber, and part of the tar is re-decomposed after contacting the high-temperature bed material recycled from the combustion chamber, so that the content of tar at the outlet is low. The temperature of the carbon combustion chamber is controlled at 900-950°C. The main function is to incinerate the coke and blocked tar produced in the gasification chamber, generate heat to heat the bed material, and maintain the temperature of the gasification chamber through the circulation of the bed material to achieve a self-sustaining gasification system. purpose of hydrogen.

Compared with the prior art, the present invention has the following advantages: First, the entire set of double fluidized beds can form a good fluidization effect through the circulation of the bed material, and can self-sustain gasification for organic solid wastes with low fuel value , high thermal energy efficiency; second, olivine is used as bed material, and with the participation of saturated steam at 400 ° C, a mixed gas with high hydrogen content is produced, and the amount of tar is small; third, the gasification chamber and the combustion chamber are separated by steam, without Blow-by gas, with higher gasification efficiency and hydrogen content; Fourth, the whole set of equipment is equipped with solenoid valves, pressure monitors, temperature monitors, gas analyzers, and flue gas monitors. By configuring the DCS system, it can realize Automatic control and online monitoring of equipment status to ensure safe operation of equipment.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1, in the embodiment of the present invention, a novel double fluidized bed device for hydrogen production from organic solid waste, including: feeding mechanism, gasification chamber 8, bed material recovery circulator 3 and combustion chamber 10; The mechanism includes a storage bin 1, which is connected to the feed bin A5 and the feed bin B6; the discharge port of the storage bin 1, the feed port and the discharge port of the feed bin A5 and the feed bin B6 are all set Solenoid valve; feeding bin A5 and feeding bin B6 are connected to the lower part of the gasification chamber 8 through the feeding pipe 7, and the lower part of the gasification chamber 8 is also connected to the lower part of the combustion chamber 10 through the obliquely downward connecting pipe 9; the combustion chamber 10 The upper part is connected to the upper part of the gasification chamber 8 through the bed material recovery circulator 3; the bottom of the combustion chamber 10 is connected to the blower; the bottom of the gasification chamber 8 and the middle part of the communication pipe 9 are connected to the steam pipe 11; Connect the steam pipe 11. Olivine is used as the bed material in the gasification chamber 8 and the combustion chamber 10; and a pressure monitor 13 and a temperature monitor 14 are installed; a gas analyzer 2 is installed at the gas outlet at the top of the gasification chamber 8; the flue gas at the top of the combustion chamber 10 A smoke detector 4 is installed at the mouth. The solenoid valve, pressure monitor 13, temperature monitor 14, gas analyzer 2, and flue gas monitor 4 in the whole device configuration can realize automatic control and online monitoring of equipment status by configuring the DCS system.

The present invention puts the organic solid waste into the storage bin 1, opens the solenoid valve at the discharge port of the storage bin 1, and selectively opens the solenoid valves at the feed port and the discharge port of the feed bin A5 or feed bin B6, namely It can be fed into the gasification chamber 8 through the feed pipe 7; when the material in the feed bin is unloaded, switch to another feed bin to ensure the airtightness of the feed bin; the gasification of organic solid waste at 750-800 ° C In the gasification chamber 8, under the action of the olivine bed material and steam, oxygen-free oxidation is carried out to generate a high-hydrogen mixed gas from the gas outlet on the top of the gasification chamber 8 after being monitored and analyzed by the gas analyzer 2, and part of the generated tar is exposed to After the triangular baffle plate 12 and the side wall in the gasification chamber 8 condense, the coke particles and olivine bed material produced along with it pass through the downward connecting pipe 9 at the lower part of the gasification chamber 8, and enter to a temperature of 900-950°C. In the combustion chamber 10, under the action of the blower at the bottom of the combustion chamber 10, the tar and coke particles are fully incinerated in the combustion chamber, so that the temperature in the combustion chamber 10 is maintained at 900-950 °C, and the olivine bed material in the combustion chamber 10 is also As the temperature rises, under the blowing of the blower at the bottom of the combustion chamber 10, it passes through the bed material recovery circulator 3 and then enters the gasification chamber 8. The high-temperature olivine bed material keeps the temperature of the gasification chamber 8 at 750-800°C. The purpose of hydrogen production by self-sustaining gasification is achieved; the flue gas produced by the combustion of the combustion chamber 10 is discharged from the top flue gas port through the flue gas monitor 4 and is monitored to meet the standard; The connection between the material recovery circulator 3 and the gasification chamber 8 is connected to the steam pipe 11, so that the flue gas generated in the combustion chamber 10 and the high-hydrogen mixed gas generated in the gasification chamber 8 will not produce blow-by.

Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (7)

1. A novel double fluidized bed device for producing hydrogen from organic solid waste, characterized in that it comprises: a feeding mechanism, a gasification chamber (8), a bed material recovery circulator (3) and a combustion chamber (10); The feeding mechanism is connected to the lower part of the gasification chamber (8) through the feeding pipe (7), and the lower part of the gasification chamber (8) is also connected to the lower part of the combustion chamber (10) through the obliquely downward communication pipe (9); the combustion chamber ( 10) The upper part is connected to the upper part of the gasification chamber (8) through the bed material recovery circulator (3); the bottom of the combustion chamber (10) is connected to the blower; the bottom of the gasification chamber (8) and the middle part of the communication pipe (9) are connected to the steam pipe (11) ; The joint of bed material recovery circulator (3) and gasification chamber (8) is connected with steam pipe (11). 2. A novel dual-fluidized bed device for hydrogen production from organic solid waste according to claim 1, characterized in that the feeding mechanism includes a storage bin (1), and the storage bin (1) is connected to a closed feeding The bin A (5) and the feed bin B (6); the feed bin A (5) and the feed bin B (6) are connected to the lower feed port of the gasification chamber (8) through the feed pipe (7). 3. A novel double fluidized bed device for hydrogen production from organic solid waste according to claim 2, characterized in that the discharge port of the storage bin (1), the feed bin A (5) and the feed bin Both the inlet and outlet of B(6) are equipped with electric valves. 4. A novel double fluidized bed device for hydrogen production from organic solid waste according to claim 1, characterized in that a plurality of triangular baffles (12) are arranged on the inner side wall of the gasification chamber (8). 5. A novel double fluidized bed device for hydrogen production from organic solid waste according to claim 1, characterized in that a gas analyzer (2) is installed at the gas outlet at the top of the gasification chamber (8). 6. A novel double fluidized bed device for producing hydrogen from organic solid waste according to claim 1, characterized in that a smoke monitor (4) is provided at the smoke port at the top of the combustion chamber (10). 7. A novel double fluidized bed device for hydrogen production from organic solid waste according to claim 1, characterized in that olivine is used as the bed material in the gasification chamber (8) and the combustion chamber (10).