Biomass gasification and waste incineration integrated furnace

Abstract

The present application provides a kind of biomass gasification and garbage incineration integrated furnace, it is related to biomass gasification and garbage incineration field, including garbage incineration hearth and biomass gasification hearth, there is mutual contact area between garbage incineration hearth and biomass gasification hearth, heat transfer can be realized between garbage incineration hearth and biomass gasification hearth, the heat generated by garbage incineration is used to conduct to biomass gasification hearth, the waste heat generated by garbage incineration can supply inside reaction of biomass gasification hearth, reduce the heat additional use of biomass gasification hearth, can save energy consumption.

Description

Technical Field

[0001] This invention relates to the field of biomass gasification and waste incineration, and more particularly to an integrated biomass gasification and waste incineration furnace. Background Technology

[0002] Biomass gasification technology is an environmentally friendly, energy-saving, and renewable technology that converts biomass materials such as wood, straw, and grass into combustible gases and solid byproducts (biochar, etc.) under high temperature, high pressure, and anaerobic or low-oxygen conditions. As an endothermic reaction, biomass gasification can be divided into the following two process routes depending on the heating method:

[0003] 1. Indirect Heating: This process route meets the heat requirements of the gasification reaction by providing a high-temperature medium externally. Common external heating media include natural gas, steam, and hot water. In this process, biomass and the gasifying agent are heated in the reactor to achieve the gasification reaction. It boasts high thermal efficiency, allows for better temperature control, and is more beneficial for reaction control and optimization. This method avoids equipment damage that may result from fuel combustion. However, this process requires additional energy input, increasing energy consumption and relatively raising costs.

[0004] 2. Autothermal Gasification: This process provides the heat required for the gasification reaction by partially burning the volatiles contained in the biomass itself. In autothermal gasification, the biomass is heated to a high temperature, and some of the volatiles undergo a combustion reaction, generating combustion products that release heat to supply the heat required for the gasification reaction. Because the required heat is provided by the partial combustion of the fuel itself, no additional energy input is needed, saving energy. This method is relatively simple and convenient to operate, with low equipment requirements. However, this method may result in heat waste, as some heat may not be fully utilized during combustion. It also requires high-quality fuel with sufficient calorific value to support the reaction.

[0005] Waste incineration is a method of treating municipal solid waste by burning it at high temperatures to convert waste into heat energy, while simultaneously reducing its volume and negative impacts. However, the flue gas produced during waste incineration contains various harmful substances, including dioxins and heavy metals. Dioxins are potent carcinogens that pose serious risks to both human health and the environment. Heavy metals such as mercury and lead are also toxic substances, posing potential risks to ecosystems and human health. To reduce the impact of these harmful substances on the environment and human health, appropriate measures must be taken for treatment.

[0006] Activated carbon capture technology is a commonly used pollution control method. It involves injecting activated carbon into flue gas, utilizing its adsorption capacity to reduce pollutant emissions. Activated carbon has a large porous structure and high specific surface area, enabling it to adsorb harmful substances such as organic matter, gaseous pollutants, and heavy metals from flue gas, thereby reducing their release into the atmosphere. However, introducing activated carbon capture technology also brings some challenges. First, activated carbon itself is an adsorbent, requiring continuous consumption based on the flue gas volume, which increases operating costs. Second, issues such as adsorbent saturation and condensation may occur during the activated carbon capture process, potentially affecting the stability and operational efficiency of the process.

[0007] In general, the introduction of activated carbon capture technology into waste incineration processes aims to reduce emissions of pollutants such as dioxins and heavy metals, thereby protecting the environment and human health. However, the use of this technology also faces some challenges, requiring a comprehensive consideration of operating costs, process stability, and treatment effectiveness to achieve environmentally friendly waste incineration.

[0008] For those skilled in the art, how to solve the heat supply problem in biomass gasification processes and save energy consumption is a technical problem that needs to be solved. Summary of the Invention

[0009] This invention provides an integrated biomass gasification and waste incineration furnace. The heat generated from waste incineration supplies heat to the biomass gasification process, saving energy consumption. Activated carbon produced by the biomass gasification process is used to adsorb the exhaust gas from waste incineration. The specific solution is as follows:

[0010] An integrated biomass gasification and waste incineration furnace includes a waste incineration furnace and a biomass gasification furnace; there is a contact area between the waste incineration furnace and the biomass gasification furnace, and the heat generated by the waste incineration furnace is conducted to the biomass gasification furnace to supply the internal reaction of the biomass gasification furnace.

[0011] Optionally, it also includes a waste heat boiler superheater, a biomass carbon reactor, and a flue gas dust collector; the waste incineration furnace is provided with a waste feed inlet for supplying waste materials; the biomass gasification furnace is provided with a biomass feed inlet for supplying biomass materials, a biomass gas outlet for discharging generated gas, a biomass carbon outlet for discharging generated activated carbon, and a steam inlet for inputting steam; the waste heat boiler superheater is provided with a steam outlet for discharging steam; the biomass carbon reactor is provided with a biomass carbon inlet for inputting activated carbon; the flue gas dust collector is provided with a flue gas outlet for discharging flue gas and an ash discharge port for discharging ash; the biomass carbon outlet is connected to the biomass carbon inlet for supplying activated carbon to the biomass carbon inlet via the biomass carbon outlet; the steam outlet is connected to the steam inlet for supplying steam to the steam inlet via the steam outlet.

[0012] Optionally, the flue gas dust collector is provided with a circulating ash outlet, which is connected to the waste feed port. The circulating ash outlet is used to supply ash to the waste feed port for burnout treatment.

[0013] Optionally, the ratio of the circulating ash volume at the circulating ash outlet to the ash discharge volume at the ash discharge port is directly proportional to the ash burnout rate; the ratio of the circulating ash volume at the circulating ash outlet to the ash discharge volume at the ash discharge port is directly proportional to the amount of biomass carbon injected; and the ratio of the circulating ash volume at the circulating ash outlet to the ash discharge volume at the ash discharge port is controlled between 0.5 and 1.5 during operation.

[0014] Optionally, the waste incineration furnace includes a waste combustion chamber and a flue gas conveying chamber that are interconnected. The waste combustion chamber is used to burn waste, and the flue gas conveying chamber is used to guide the generated flue gas. The flue gas conveying chamber contacts the biomass gasification furnace and conducts heat.

[0015] Optionally, the flue gas conveying chamber includes at least two parallel channels arranged side by side, which are inserted into the biomass gasification furnace.

[0016] Optionally, the flue gas conveying chamber includes at least one temperature control channel, which does not conduct heat to the biomass gasification furnace; a flow control temperature damper is provided in the parallel channel and / or the temperature control channel, and the flow control temperature damper is used to adjust the flue gas flow ratio between the parallel channel and the temperature control channel.

[0017] Optionally, the height of the waste incineration furnace is lower than the height of the biomass gasification furnace, and the parallel channel passes through the interior of the biomass gasification furnace.

[0018] Optionally, the flue gas conveying chamber conveys flue gas horizontally, and the biomass gasification furnace conveys biomass materials vertically; a biomass feed port is provided at the top of the biomass gasification furnace, a biomass fuel gas outlet is provided on the side of the top of the biomass gasification furnace, a biomass carbon outlet is provided at the bottom of the biomass gasification furnace, and a steam inlet is provided on the side of the bottom of the biomass gasification furnace.

[0019] Optionally, the biomass gasification furnace is a bubbling fluidized bed gasification furnace, used to enable biomass materials to undergo a single reaction.

[0020] This invention provides an integrated biomass gasification and waste incineration furnace, comprising a waste incineration furnace and a biomass gasification furnace. There is a contact area between the waste incineration furnace and the biomass gasification furnace, and heat transfer can be achieved between them. The heat generated in the waste incineration furnace is conducted to the biomass gasification furnace, and the waste heat generated from waste incineration can be used for internal reactions in the biomass gasification furnace, reducing the additional heat used in the biomass gasification furnace and saving energy consumption. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A front view structural schematic diagram of the integrated biomass gasification and waste incineration furnace provided by the present invention;

[0023] Figure 2 A side view schematic diagram showing the interaction between the flue gas conveying chamber, the flow and temperature control baffle door, and the biomass gasification furnace.

[0024] Figure 3 A top view schematic diagram showing the interaction between the flue gas conveying chamber, the flow control and temperature control baffle, and the biomass gasification furnace.

[0025] The image includes:

[0026] Waste incinerator 1, waste feed inlet 11, waste combustion chamber 1.1, flue gas conveying chamber 1.2, parallel channel 1.21, temperature control channel 1.22, flow and temperature control baffle 2, biomass gasification furnace 3, biomass feed inlet 31, biomass gas outlet 32, biomass carbon outlet 33, steam inlet 34, waste heat boiler superheater 4, steam outlet 41, biomass carbon reaction tower 5, biomass carbon inlet 51, flue gas dust collector 6, flue gas outlet 61, circulating ash outlet 62, ash discharge port 63. Detailed Implementation

[0027] The core of this invention is to provide an integrated biomass gasification and waste incineration furnace, in which the heat generated by waste incineration supplies heat to the biomass gasification process, saving energy consumption, and the activated carbon generated by the biomass gasification process adsorbs the exhaust gas from waste incineration.

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the integrated biomass gasification and waste incineration furnace of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Combination Figure 1 The present invention provides an integrated biomass gasification and waste incineration furnace, including a waste incineration furnace 1 and a biomass gasification furnace 3. The waste incineration furnace 1 and the biomass gasification furnace 3 each have an inner cavity. The interior of the waste incineration furnace 1 is used for waste incineration, and the interior of the biomass gasification furnace 3 is used for biomass gasification.

[0030] There is a contact area between the waste incineration furnace 1 and the biomass gasification furnace 3. No heat insulation layer is provided in the contact area between the waste incineration furnace 1 and the biomass gasification furnace 3. Thermally conductive materials can be used in the contact area between the waste incineration furnace 1 and the biomass gasification furnace 3. The heat generated by the waste incineration furnace 1 is used to conduct heat to the biomass gasification furnace 3 to supply the internal reaction of the biomass gasification furnace 3.

[0031] The waste incineration furnace 1 is used for waste incineration reaction. The heat generated by waste incineration is directly transferred to the biomass gasification furnace 3 through heat conduction. The biomass gasification reaction takes place inside the biomass gasification furnace 3. After the gasification reaction, gas (the biomass fuel gas composition includes but is not limited to hydrogen and carbon monoxide) and biochar (activated carbon) are formed. The reaction process requires heat supplied from the outside. The heat generated by the waste incineration furnace 1 is directly transferred to the biomass gasification furnace 3 and can be used for the gasification reaction inside the biomass gasification furnace 3.

[0032] This invention supplies heat to the biomass gasification furnace 3 through heat conduction between the waste incineration furnace 1 and the biomass gasification furnace 3. This can reduce the additional heat used by the biomass gasification furnace 3, or the biomass gasification furnace 3 can be completely free from external additional heat supply, so that the heat generated by the waste incineration furnace 1 can be effectively utilized, thus saving energy consumption.

[0033] Based on the above scheme, the integrated biomass gasification and waste incineration furnace of the present invention also includes a waste heat boiler superheater 4, a biomass carbon reaction tower 5, and a flue gas dust collector 6, arranged sequentially according to the flow direction of the flue gas. The waste heat boiler superheater 4 is located inside the waste incineration furnace 1, and the waste incineration furnace 1, the biomass carbon reaction tower 5, and the flue gas dust collector 6 are sequentially connected to allow the flue gas to pass through.

[0034] The waste heat boiler superheater 4 is used to generate steam; the biomass carbon reaction tower 5 is filled with activated carbon, and when the flue gas flows through the biomass carbon reaction tower 5, it captures harmful substances such as heavy metals and dioxins in the flue gas; the biomass carbon that has captured heavy metals and dioxins is collected by the flue gas dust collector 6.

[0035] The waste incinerator 1 is equipped with a waste feed inlet 11 for supplying waste materials, which are then fed into the incinerator 1. The biomass gasification furnace 3 is equipped with a biomass feed inlet 31 for supplying biomass materials, a biomass fuel gas outlet 32 ​​for discharging generated gas, a biomass carbon outlet 33 for discharging generated activated carbon, and a steam inlet 34 for inputting steam. Biomass materials enter the biomass gasification furnace 3 through the biomass feed inlet 31. The gas generated by the gasification reaction is discharged through the biomass fuel gas outlet 32, and the biomass carbon generated by the gasification reaction is discharged through the biomass carbon outlet 33. Simultaneously, external steam enters the biomass gasification furnace 3 through the steam inlet 34, serving as the gasification medium for the gasification reaction within the biomass gasification furnace 3.

[0036] Combination Figure 1 The waste heat boiler superheater 4 is equipped with a steam outlet 41 for discharging steam; the biomass carbon reactor 5 is equipped with a biomass carbon inlet 51 for inputting activated carbon; the flue gas dust collector 6 is equipped with a flue gas outlet 61 for discharging flue gas and an ash discharge port 63 for discharging ash. The biomass carbon outlet 33 is connected to the biomass carbon inlet 51. The activated carbon generated by the gasification reaction inside the biomass gasification furnace 3 flows through the biomass carbon outlet 33 to the biomass carbon inlet 51 to supply activated carbon to the biomass carbon reactor 5. Inside the biomass carbon reactor 5, the activated carbon adsorbs the flue gas, capturing heavy metals and dioxins and other harmful substances in the flue gas.

[0037] It should be noted that the flue gas discharged from the flue gas outlet 61 can flow directly to the next process or flow back into the biomass gasification furnace 3. The heat carried in the flue gas can be reintroduced into the biomass gasification furnace 3 to assist in the heating treatment of the gasification reaction. These specific implementation methods should all be included within the protection scope of this invention.

[0038] The steam outlet 41 of the waste heat boiler superheater 4 is connected to the steam inlet 34. The steam generated by the waste heat boiler superheater 4 flows to the steam inlet 34 through the steam outlet 41 and supplies steam to the biomass gasification furnace 3 as the gasification medium for the gasification reaction in the biomass gasification furnace 3.

[0039] In other words, the integrated biomass gasification and waste incineration furnace of the present invention not only supplies heat to the biomass gasification reaction through the waste incineration reaction, but also supplies activated carbon to the waste incineration reaction through the biomass gasification reaction. The activated carbon is used to adsorb the flue gas, eliminating the need for external supply of activated carbon or reducing the amount of externally supplied activated carbon.

[0040] Combination Figure 1As shown, the flue gas dust collector 6 of the present invention is provided with a circulating ash outlet 62, which is connected to the waste feed inlet 11. The circulating ash outlet 62 is used to supply ash to the waste feed inlet 11 for combustion treatment. Some of the dust in the flue gas dust collector 6 is discharged from the circulating ash outlet 62, and the dust discharged from the circulating ash outlet 62 is returned to the waste feed inlet 11 as circulating ash for combustion treatment, so that the dust is burned more completely.

[0041] The ratio of the circulating ash amount at the circulating ash outlet 62 to the ash discharge amount at the ash discharge port 63 is directly proportional to the ash burnout rate; the ratio of the circulating ash amount at the circulating ash outlet 62 to the ash discharge amount at the ash discharge port 63 is directly proportional to the amount of biomass carbon injected; the ratio of the circulating ash amount at the circulating ash outlet 62 to the ash discharge amount at the ash discharge port 63 is controlled between 0.5 and 1.5 during operation.

[0042] Based on any of the above technical solutions and their combinations, combined with Figure 1 The waste incineration furnace 1 of the present invention includes a waste combustion chamber 1.1 and a flue gas conveying chamber 1.2 that are interconnected. The waste combustion chamber 1.1 is located at a lower position, while the flue gas conveying chamber 1.2 is located at a higher position. Waste fed into the waste feed port 11 enters the waste combustion chamber 1.1, accumulates, and is burned. The generated flue gas enters the flue gas conveying chamber 1.2, which guides the generated flue gas. The flue gas flows along the flue gas conveying chamber 1.2. Since the flue gas carries heat, the flue gas conveying chamber 1.2 contacts the biomass gasification furnace 3 and conducts heat, thereby maintaining the gasification reaction temperature of the biomass gasification furnace 3.

[0043] Combination Figure 2 , Figure 3 As shown, the flue gas conveying chamber 1.2 includes at least two parallel channels 1.21 arranged side by side. Each parallel channel 1.21 is a relatively independent channel for flue gas flow. The flue gas generated from the combustion in the waste combustion chamber 1.1 flows to different parallel channels 1.21, and each parallel channel 1.21 guides the flue gas flow independently. The parallel channels 1.21 are distributed in a roughly parallel manner and are interspersed within the biomass gasification furnace 3. Due to the use of multiple parallel channels 1.21, the sidewall of each parallel channel 1.21 is in contact with the biomass gasification furnace 3, which can increase the heat conduction area and allow more heat to be conducted to the biomass gasification furnace 3 more evenly.

[0044] Combination Figure 2 , Figure 3As shown, the flue gas conveying chamber 1.2 includes at least one temperature control channel 1.22. The temperature control channel 1.22 is used for flue gas flow, and the temperature control channel 1.22 does not have thermal contact with the biomass gasification furnace 3, nor does it conduct heat to the biomass gasification furnace 3. The temperature control channel 1.22 and the parallel channel 1.21 are distributed side by side and convey flue gas independently of each other.

[0045] A flow-rate temperature-controlled baffle 2 is installed in the parallel channel 1.21 and / or the temperature-controlled channel 1.22. The flow-rate temperature-controlled baffle 2 can be installed individually in the parallel channel 1.21 or the temperature-controlled channel 1.22, or simultaneously in both. The flow-rate temperature-controlled baffle 2 is used to adjust the flue gas flow ratio between the parallel channel 1.21 and the temperature-controlled channel 1.22. The opening of the flow-rate temperature-controlled baffle 2 can be adjusted, thereby changing the flue gas flow in the parallel channel 1.21 or the temperature-controlled channel 1.22. When the biomass gasification furnace 3 needs to be heated, the proportion of flue gas in the parallel channel 1.21 is increased, and the proportion of flue gas in the temperature-controlled channel 1.22 is decreased. More flue gas flows through the parallel channel 1.21, directing more heat to the biomass gasification furnace 3, thus raising the temperature of the biomass gasification furnace 3. When it is necessary to reduce the temperature of the biomass gasification furnace 3, the proportion of flue gas in the parallel channel 1.21 is reduced and the proportion of flue gas in the temperature control channel 1.22 is increased. Less flue gas flows through the parallel channel 1.21, so less heat is directed to the biomass gasification furnace 3, and the temperature of the biomass gasification furnace 3 decreases.

[0046] Combination Figure 3 As shown, the arrows indicate the direction of flue gas flow. The structure shown only has a flow control temperature baffle 2 in the temperature control channel 1.22. The temperature of the biomass gasification furnace 3 is controlled by the opening of the flow control temperature baffle 2, which has an opening range of 90-180° (that is, the angle between the flow control temperature baffle 2 and the horizontal line).

[0047] Combination Figure 1 As shown, the height of the waste incineration furnace 1 is lower than the height of the biomass gasification furnace 3. The parallel channel 1.21 passes through the inside of the biomass gasification furnace 3. The biomass material in the biomass gasification furnace 3 is distributed in the space between the parallel channels 1.21, and the heat is conducted to the biomass material relatively evenly.

[0048] Combination Figure 1As shown, the flue gas conveying chamber 1.2 conveys flue gas horizontally, while the biomass gasification furnace 3 conveys biomass materials vertically. A biomass feed inlet 31 is located at the top of the biomass gasification furnace 3, a biomass fuel gas outlet 32 ​​is located on the side of the top of the biomass gasification furnace 3, a biomass carbon outlet 33 is located at the bottom of the biomass gasification furnace 3, and a steam inlet 34 is located on the side of the bottom of the biomass gasification furnace 3. Biomass materials are supplied to the biomass gasification furnace 3 from the top feed inlet 31. The gas generated by the gasification reaction flows upward and exits from the biomass fuel gas outlet 32. The activated carbon generated by the gasification reaction is exited from the bottom through the biomass carbon outlet 33.

[0049] The biomass gasification furnace 3 is a bubbling fluidized bed gasification furnace, which is used to enable the biomass material to react in a single reaction. The biomass material does not circulate and react within the biomass gasification furnace 3, which can generate more activated carbon for flue gas adsorption.

[0050] Compared with the prior art, the present invention has the following advantages and effects:

[0051] 1. Self-sufficient heat source for biomass gasification: Traditional biomass gasification technologies typically require external energy sources to provide the heat needed for the gasification process, which increases energy consumption and operating costs. This invention achieves self-sufficiency in the heat source required for biomass gasification by exchanging heat between the hot flue gas provided by waste incineration and the bubbling fluidized bed gasification furnace, thus solving the problem of dependence on external energy sources in traditional systems.

[0052] 2. Internally Sourced Activated Carbon Self-Supply Flue Gas Purification System: During the flue gas purification process of waste incineration, a large amount of activated carbon is often required to capture and adsorb pollutants, leading to high demand and frequent replacement, thus increasing operating costs. This invention utilizes biomass carbon produced during biomass gasification as activated carbon, injecting it into the flue gas to capture pollutants such as heavy metals and dioxins. This achieves internal supply of activated carbon for flue gas purification in waste incineration systems, reducing the need for external activated carbon.

[0053] 3. Enhanced Fuel Adaptability: Traditional technologies have poor fuel adaptability, often only processing specific types of biomass, such as wood or straw, limiting their application scope due to the limited fuel variety. This invention integrates two systems: biomass and industrial waste. It is applicable not only to the gasification of natural biomass but also to the incineration of industrial waste, thus overcoming the limitation of limited fuel variety in traditional technologies. Simultaneously, byproducts from biomass gasification can be used for power generation or direct combustion, enhancing the system's fuel adaptability and overall energy utilization efficiency.

[0054] 4. Flexible control capability: Traditional biomass gasification processes require high precision in temperature control. Excessively low temperatures can lead to slow reaction rates and incomplete product formation, while excessively high temperatures can result in decreased product quality and equipment damage. This invention precisely controls the flow rate of the heating medium through a flow-controlled temperature damper, achieving precise control of the gasification reaction temperature. This improves the efficiency and stability of the gasification reaction, reduces corrosion and wear on gasification equipment, and enhances product quality and energy utilization efficiency.

[0055] 5. Increased burnout rate through circulating ash combustion: In traditional waste incineration processes, activated carbon injected directly into the flue gas dust collector after capturing dioxins and heavy metals, resulting in a complete waste of its calorific value. In this technology, a portion of the ash from the flue gas dust collector is returned to the waste incineration furnace as circulating ash, thereby improving combustion efficiency and reducing the emission of harmful substances.

[0056] This invention provides a specific example in which the biomass materials involve three types: rice husks, straw, and forestry waste. Their industrial and elemental analyses are as follows:

[0057] Table 1 Industrial and elemental analysis of raw materials

[0058] project unit rice husk Forestry waste straw Industrial waste whole water % 10.5 22.6 16.7 49.09 Received base ash % 9.71 16.27 12.02 27.97 Received base volatiles % 14.87 18.02 15.35 19.83 Received base fixed carbon % 58.19 46.66 51.09 3.11 Received high heat of the base MJ / kg 37.27 31.07 34.98 39.33 Received low-grade heat of heat MJ / kg 4.09 3.19 3.41 4.05 Total sulfur % 0.30 0.72 0.60 0.35 Received basic carbon % 32.94 24.36 28.90 55.62 Received basic hydrogen % 0.03 0.04 0.06 7.98 Received basic nitrogen % 14.76 11.89 13.49 1.70 Received basic oxygen % 13.68 10.71 12.40 34.39

[0059] Operating Condition 1: In biomass gasification furnace 3, 100% rice husks are burned. Under 100% load, the biomass consumption is 7.26 t / h, and the biomass gas flow rate after gasification is 12857 m³ / h. 3 / h, the biomass gas temperature is 702.4℃, and the lower heating value of wet biomass gas is 3.349MJ / m³. 3 The gas production rate is 1.771 m³. 3 / kg, with a carbon production rate of 0.242kg / kg. The waste consumption is 70t / day, and the biochar injection rate is approximately 2.91kg / h.

[0060] Operating Condition 2: In biomass gasification furnace 3, 50% rice husks and 50% forestry waste are burned. Under 100% load, the biomass feed consumption is 8.48 t / h, and the biomass gas flow rate is 17304 m³ / h. 3 / h, the biomass gas temperature is 698.4℃, and the lower heating value of wet biomass gas is 3.128MJ / m³. 3 The gas production rate is 1.546 m³. 3 / kg, carbon production rate is 0.271kg / kg. 70t / day, biochar injection rate is approximately 2.91kg / h.

[0061] Operating Condition 3: The biomass gasification furnace 3 uses 100% straw. At 100% load, the biomass consumption is 8.54 t / h, and the biomass gas flow rate after gasification is 18267 m³ / h. 3 / h, the biomass gas temperature is 688.4℃, and the lower heating value of wet biomass gas is 2.926MJ / m³. 3 The gas production rate is 1.685 m³. 3 / kg, carbon production rate is 0.312kg / kg. 70t / day, biochar injection rate is approximately 2.91kg / h.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated biomass gasification and waste incineration furnace, characterized in that, Including waste incineration furnace (1) and biomass gasification furnace (3); There is a contact area between the waste incineration furnace (1) and the biomass gasification furnace (3). The heat generated by the waste incineration furnace (1) is conducted to the biomass gasification furnace (3) to supply the internal reaction of the biomass gasification furnace (3). It also includes a waste heat boiler superheater (4), a biomass charcoal reaction tower (5), and a flue gas dust collector (6); The waste incineration furnace (1) is provided with a waste feed port (11) for supplying waste materials. The biomass gasification furnace (3) is equipped with a biomass feed port (31) for supplying biomass materials, a biomass gas outlet (32) for discharging generated gas, a biomass carbon outlet (33) for discharging generated activated carbon, and a steam inlet (34) for inputting steam. The waste heat boiler superheater (4) is provided with a steam outlet (41) for discharging steam. The biochar reactor (5) is provided with a biochar inlet (51) for inputting activated carbon. The flue gas dust collector (6) is provided with a flue gas outlet (61) for discharging flue gas and an ash discharge port (63) for discharging ash. The biochar outlet (33) is connected to the biochar inlet (51) and is used to supply activated carbon to the biochar inlet (51) via the biochar outlet (33); the steam outlet (41) is connected to the steam inlet (34) and is used to supply steam to the steam inlet (34) via the steam outlet (41). The flue gas dust collector (6) is provided with a circulating ash outlet (62), which is connected to the garbage feed port (11). The circulating ash outlet (62) is used to supply ash to the garbage feed port (11) for burnout treatment. The waste incineration furnace (1) includes a waste combustion chamber (1.1) and a flue gas conveying chamber (1.2) that are interconnected. The waste combustion chamber (1.1) is used to supply waste for combustion, and the flue gas conveying chamber (1.2) is used to guide the generated flue gas. The flue gas conveying chamber (1.2) contacts the biomass gasification furnace (3) and conducts heat; The flue gas conveying chamber (1.2) includes at least two parallel channels (1.21) arranged side by side, which are inserted into the biomass gasification furnace (3). The flue gas conveying chamber (1.2) includes at least one temperature control channel (1.22), which does not conduct heat to the biomass gasification furnace (3); A flow control temperature baffle (2) is provided in the parallel channel (1.21) and / or the temperature control channel (1.22), and the flow control temperature baffle (2) is used to adjust the flue gas flow ratio between the parallel channel (1.21) and the temperature control channel (1.22).

2. The integrated biomass gasification and waste incineration furnace according to claim 1, characterized in that, The ratio of the circulating ash amount at the circulating ash outlet (62) to the ash discharge amount at the ash discharge outlet (63) is directly proportional to the ash burnout rate. The ratio of the circulating ash amount at the circulating ash outlet (62) to the ash discharge amount at the ash discharge outlet (63) is directly proportional to the amount of biochar injected. The ratio of the circulating ash amount at the circulating ash outlet (62) to the ash discharge amount at the ash discharge outlet (63) is controlled between 0.5 and 1.5 during operation.

3. The integrated biomass gasification and waste incineration furnace according to claim 1, characterized in that, The height of the waste incineration furnace (1) is lower than the height of the biomass gasification furnace (3), and the parallel channel (1.21) passes through the interior of the biomass gasification furnace (3).

4. The integrated biomass gasification and waste incineration furnace according to claim 1, characterized in that, The flue gas conveying chamber (1.2) conveys flue gas laterally, and the biomass gasification furnace (3) conveys biomass materials vertically. The top of the biomass gasification furnace (3) is provided with a biomass feed port (31), the side of the top of the biomass gasification furnace (3) is provided with a biomass gas outlet (32), the bottom of the biomass gasification furnace (3) is provided with a biomass char outlet (33), and the side of the bottom of the biomass gasification furnace (3) is provided with a steam inlet (34).

5. The integrated biomass gasification and waste incineration furnace according to claim 1, characterized in that, The biomass gasification furnace (3) is a bubbling fluidized bed gasification furnace, used to enable biomass materials to undergo a single reaction.

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