Medical cooking system of biomass gasifier and method thereof

Abstract

The invention belongs to the technical field of energy conversion equipment, and particularly relates to a medical cooking system of a biomass gasifier and a method of the medical cooking system. Comprising a central processing unit module, a raw material drying module, a feeding module, a gasification furnace module, a water-cooling charcoal discharging module, a biomass charcoal bin module, a combustion chamber module, a waste heat boiler module, a high-temperature steam sterilization module, a hot water heat exchange module and a flue gas purification module. The central processing unit module is connected with the raw material drying module through a signal; the raw material drying module is in signal connection with the feeding module; the feeding module is in signal connection with the gasification furnace module; a diesel boiler is replaced by a scheme of biomass gasification, a gas boiler and a steam heat accumulator; biomass serves as zero-carbon energy, and the problem of carbon emission of an original diesel boiler can be solved. Meanwhile, the cost of the biomass fuel is far lower than that of diesel oil.

Description

Technical Field

[0001] The invention belongs to the technical field of energy conversion equipment, in particular to a medical cooking system of a biomass gasifier and a method thereof. Background Art

[0002] A gasifier is a device that converts carbon-containing raw materials into combustible gas through partial oxidation reaction under high temperature conditions. It is widely used in energy, chemical industry, environmental protection and other fields. It is one of the key technologies to achieve clean energy conversion and efficient utilization of resources.

[0003] Gasifiers can be mainly divided into fixed bed gasifiers and fluidized bed gasifiers. This equipment is widely used in medical cooking, mainly due to its high efficiency and environmental protection characteristics. It converts solid fuels into combustible gases and can provide a stable and efficient heat source for the cooking process of medical equipment.

[0004] Through long-term observation, existing medical cooking usually adopts diesel boilers or natural gas boilers, which have high operating costs and, as fossil energy, have the problem of carbon dioxide emissions. Therefore, a medical cooking system and method of a biomass gasification furnace are proposed to address the above problems. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention proposes a medical cooking system of a biomass gasifier and a method thereof.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the medical cooking system and method of a biomass gasifier described in the present invention include a central processing unit module, a raw material drying module, a feeding module, a gasifier module, a water-cooled charcoal outlet module, a biomass charcoal bin module, a combustion chamber module, a waste heat boiler module, a high-temperature steam sterilization module, a hot water heat exchange module and a flue gas purification module; the central processing unit module and the raw material drying module are connected by a signal; the raw material drying module and the feeding module are connected by a signal; the feeding module and the gasifier module are connected by a signal The feeding module and the gasifier module are connected by signals; the gasifier module and the water-cooled charcoal outlet module are connected by signals; the water-cooled charcoal outlet module and the biomass charcoal bin module are connected by signals; the biomass charcoal bin module and the combustion chamber module are connected by signals; the combustion chamber module and the waste heat boiler module are connected by signals; the waste heat boiler module and the high-temperature steam sterilization module are connected by signals; the waste heat boiler module and the hot water heat exchange module are connected by signals; the combustion chamber module and the flue gas purification module are connected by signals;

[0007] The central processing unit module and the raw material drying module are connected by signals: the central processing unit module is responsible for performing logical operations, data processing, and equipment control to ensure the safe operation of each process module; the raw material drying module removes excess moisture from the biomass raw material through the raw material drying device;

[0008] The raw material drying module and the feeding module are connected via signals; the feeding module continuously or intermittently delivers the raw materials to the processing equipment via a feeding device;

[0009] The feeder module and the gasifier module are connected via a signal; the gasifier module converts solid or liquid raw materials into combustible gas via the gasifier;

[0010] The gasification furnace module and the water-cooled carbon-discharging module are connected via a signal; the water-cooled carbon-discharging module rapidly cools and transports solid products via a water-cooled carbon-discharging device;

[0011] The water-cooled charcoal outlet module and the biomass charcoal bin module are connected via a signal; the biomass charcoal bin module stores materials via the biomass charcoal bin;

[0012] The biomass charcoal bin module and the combustion chamber module are connected via signals; the combustion chamber module converts fuel into heat energy through the combustion chamber;

[0013] The combustion chamber module and the waste heat boiler module are connected via signals; the waste heat boiler module recovers excess heat through the waste heat boiler;

[0014] The waste heat boiler module and the high-temperature steam sterilization module are provided with a signal connection; the high-temperature steam sterilization module sterilizes the steam quickly and reliably through a high-temperature steam sterilization pot;

[0015] The waste heat boiler module and the hot water heat exchange module are provided with a signal connection; the hot water heat exchange module converts the waste heat of flue gas into hot water heat energy through a flue gas-hot water heat exchanger;

[0016] The combustion chamber module and the flue gas purification module are signal-connected; the flue gas purification module purifies the polluted flue gas through a flue gas purification device.

[0017] Preferably, the hot water heat exchange module generates high-temperature hot water after heat exchange through a flue gas-hot water heat exchanger, and the steam exhausted from the cooking system generates high-temperature hot water after heat exchange through a steam-hot water heat exchanger.

[0018] Preferably, the flue gas-hot water heat exchanger adopts a water exchanger tank plus a water supply coil.

[0019] A method for medical cooking of a biomass gasifier, the valve switching control method of the steam-hot water heat exchange is applicable to the medical cooking system of the biomass gasifier described above, and the control method comprises the following steps:

[0020] S1: When entering the steam exhaust process: valve 1 is open and valve 2 is closed;

[0021] S2: When entering the vacuum pumping process after cooking: valve 1 is closed and valve 2 is opened;

[0022] S3: When entering the vacuum pumping process before cooking: valve 1 is closed and valve 2 is opened;

[0023] S4: When entering other processes, valve 1 is closed and valve 2 is closed.

[0024] Preferably, the set biomass raw material amount is M1 (kg / h); the air drying air volume is M3 (kg / h); the mass of the biomass after drying is M2 (kg / h); the amount of moist hot air after heat exchange is M4 (m3 / h); the dehumidification amount of the biomass raw material is M5 (kg / h);

[0025] According to the law of conservation of mass:

[0026] M1+M3=M2+M4;

[0027] M1-M2=M5.

[0028] Preferably, the biomass raw material is set to have an enthalpy of H1 (kJ), a specific heat of C1 (kJ / (kg*℃)), and a temperature of T1 (℃); the air drying wind is set to have an enthalpy of H3 (kJ), a specific heat of C3 (kJ / (kg*℃)), and a temperature of T3 (℃); the enthalpy of the biomass after drying is set to H2 (kJ), a specific heat of C2 (kJ / (kg*℃)), and a temperature of T2 (℃); the enthalpy of the moist hot air after heat exchange is set to H4 (kJ), a specific heat of C4 (kJ / (kg*℃)), and a temperature of T4 (℃); the heat dissipation loss of the biomass raw material drying device is Q heat dissipation 1 (kJ), and the heat dissipation loss is considered to be 5% according to the law of conservation of energy:

[0029] H1+H3=H2+H4+Q heat dissipation;

[0030] H1=M1×C1×T1;

[0031] H2=M2×C2×T2;

[0032] H3=M3×C3×T3;

[0033] H4=M4×C4×T4;

[0034] Q heat dissipation = 5% × (H1 + H3).

[0035] Preferably, the hot water mass is set to M6 (kg / h); the ambient air is set: the enthalpy value is H3' (kJ), the specific heat capacity is C3' (kJ / (kg*℃)), and the temperature is T3' (℃); the hot water is set: the enthalpy value is H6 (kJ), the specific heat capacity is C6 (kJ / (kg*℃)), and the temperature is T6 (℃); the cold water is set: the enthalpy value is H6' (kJ), the specific heat capacity is C6' (kJ / (kg*℃)), and the temperature is T6' (℃); the heat dissipation loss of the hot water air heat exchanger is Q heat dissipation 2 (kJ), and the heat dissipation loss is considered to be 2% according to the law of conservation of energy:

[0036] H6-H6'=H3-H3'-Q heat dissipation 2;

[0037] H3'=M3×C3'×T3';

[0038] H6=M6×C6×T6;

[0039] H6'=M6×C6'×T6';

[0040] Q heat dissipation 2 = 2% × (H6 - H6').

[0041] Preferably, it is characterized in that: the set flue gas mass is M7 (kg / h); the flue gas before heat exchange is set: enthalpy is H7 (kJ), specific heat capacity is C7 (kJ / (kg*℃)), temperature is T7 (℃); the flue gas after heat exchange is set: enthalpy is H7' (kJ), specific heat capacity is C7' (kJ / (kg*℃)), temperature is T7' (℃); the intermediate water is set: enthalpy is H6" (kJ), specific heat capacity is C6" (kJ / (kg*℃)), temperature is T6" (℃); the heat dissipation loss of the flue gas-hot water heat exchanger is Q heat dissipation 3 (kJ), and the heat dissipation loss is considered to be 2% according to the law of conservation of energy:

[0042] H7-H7'=H6-H6”-Q heat dissipation 3;

[0043] H6”=M6×C6”×T6”;

[0044] H7=M7×C7×T7;

[0045] H7' = M7 × C7' × T7';

[0046] Q heat dissipation 3 = 2% × (H7-H7').

[0047] Preferably, the steam quality is set to M8 (kg / h); boiler feed water is M9 (kg / h); steam before heat exchange is set: enthalpy is H8 (kJ), specific heat capacity is C8 (kJ / (kg*℃)), temperature is T8 (℃); condensed water after heat exchange is set: enthalpy is H8' (kJ), specific heat capacity is C8' (kJ / (kg*℃)), temperature is T8' (℃); boiler feed water before heat exchange is set: enthalpy is H9 (kJ), specific heat capacity is C9 (kJ / (kg*℃)), temperature is T9 (℃); boiler feed water after heat exchange is set: enthalpy is H9' (kJ), specific heat capacity is C9' (kJ / (kg*℃)), temperature is T9' (℃); heat dissipation loss of steam-hot water heat exchanger is Q heat dissipation 4 (kJ), heat dissipation loss is considered as 2% according to the law of conservation of energy:

[0048] H8-H8'+H9-H9'=H6”-H6'-Q heat dissipation 4;

[0049] H8 = M8 × C8 × T8;

[0050] H8' = M8 × C8' × T8';

[0051] H9=M9×C9×T9;

[0052] H9' = M9 × C9' × T9';

[0053] Q heat dissipation 4 = 2% × (H8-H8'+H9-H9').

[0054] Beneficial effects of the present invention:

[0055] The present invention provides a medical cooking system of a biomass gasifier and a method thereof, which replaces a diesel boiler by adopting a solution of biomass gasification plus a gas boiler plus a steam accumulator; biomass, as a zero-carbon energy source, can solve the problem of carbon emissions from the original diesel boiler; and the cost of biomass fuel is also much lower than that of diesel.

[0056] The present invention provides a medical cooking system of a biomass gasifier and a method thereof, which reduces the water content of biomass, adds a steam-hot water heat exchange system and a flue gas-hot water heat exchange system, fully utilizes the flue gas waste heat and steam waste heat in the system, and further saves energy and reduces carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0058] Figure 1 This is a process system diagram of biomass gasification for medical cooking in the present invention;

[0059] Figure 2 It is a schematic diagram of the cooking cycle in the present invention;

[0060] Figure 3 It is a chain description of intermittent steam waste heat utilization in the present invention;

[0061] Figure 4 It is a mass balance schematic diagram of the biomass raw material drying device in the present invention;

[0062] Figure 5 It is a schematic diagram of energy balance of the hot water-air heat exchanger in the present invention;

[0063] Figure 6 It is a schematic diagram of energy balance of flue gas-hot water heat exchanger in the present invention;

[0064] Figure 7 It is a schematic diagram of energy balance of the steam-hot water heat exchanger in the present invention;

[0065] Figure 8 It is a schematic diagram of the steam-smoke-hot water-air waste heat automatic adjustment optimization system in the present invention;

[0066] Fig. 9 is a system flow chart of the present invention;

[0067] Fig.10 It is a flow chart of the method in the present invention. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] Specific examples are given below.

[0070] like Figure 1 and 9As shown, a medical cooking system of a biomass gasifier and a method thereof, comprising a central processing unit module, a raw material drying module, a feeding module, a gasifier module, a water-cooled charcoal outlet module, a biomass charcoal bin module, a combustion chamber module, a waste heat boiler module, a high-temperature steam sterilization module, a hot water heat exchange module and a flue gas purification module; the central processing unit module and the raw material drying module are connected by signals; the raw material drying module and the feeding module are connected by signals; the feeding module and the gasifier module are connected by signals; the feeding module and the gasifier module are connected by signals; the gasifier module and the water-cooled charcoal outlet module are connected by signals; the water-cooled charcoal outlet module and the biomass charcoal bin module are connected by signals; the biomass charcoal bin module and the combustion chamber module are connected by signals; the combustion chamber module and the waste heat boiler module are connected by signals; the waste heat boiler module and the high-temperature steam sterilization module are connected by signals; the waste heat boiler module and the hot water heat exchange module are connected by signals; the combustion chamber module and the flue gas purification module are connected by signals;

[0071] The central processing unit module and the raw material drying module are connected by signals: the central processing unit module is responsible for performing logical operations, data processing, and equipment control to ensure the safe operation of each process module; the raw material drying module removes excess moisture from the biomass raw material through the raw material drying device;

[0072] The raw material drying module and the feeding module are connected via signals; the feeding module continuously or intermittently delivers the raw materials to the processing equipment via a feeding device;

[0073] The feeder module and the gasifier module are connected via a signal; the gasifier module converts solid or liquid raw materials into combustible gas via the gasifier;

[0074] The gasification furnace module and the water-cooled carbon-discharging module are connected via a signal; the water-cooled carbon-discharging module rapidly cools and transports solid products via a water-cooled carbon-discharging device;

[0075] The water-cooled charcoal outlet module and the biomass charcoal bin module are connected via a signal; the biomass charcoal bin module stores materials via the biomass charcoal bin;

[0076] The biomass charcoal bin module and the combustion chamber module are connected via signals; the combustion chamber module converts fuel into heat energy through the combustion chamber;

[0077] The combustion chamber module and the waste heat boiler module are connected via signals; the waste heat boiler module recovers excess heat through the waste heat boiler;

[0078] The waste heat boiler module and the high-temperature steam sterilization module are provided with a signal connection; the high-temperature steam sterilization module sterilizes the steam quickly and reliably through a high-temperature steam sterilization pot;

[0079] The waste heat boiler module and the hot water heat exchange module are provided with a signal connection; the hot water heat exchange module converts the waste heat of flue gas into hot water heat energy through a flue gas-hot water heat exchanger;

[0080] The combustion chamber module and the flue gas purification module are signal connected; the flue gas purification module purifies the polluted flue gas through the flue gas purification device; the biomass raw material first passes through the biomass raw material drying device (and a bypass is set up not to pass through the biomass raw material drying device) and then passes through the biomass feeding system to the biomass gasifier. After the fuel is gasified in the gasifier, three products are formed: biomass charcoal, biomass gas, and biomass tar; the biomass charcoal is sent to the biomass charcoal bin after passing through the water-cooled charcoal outlet device; the biomass gas and Biomass tar is sent into the adiabatic combustion chamber by the gas booster fan for combustion; the high-temperature flue gas generated after combustion enters the waste heat boiler, and the waste heat boiler generates qualified steam which is sent to the heat accumulator or directly to the high-temperature steam sterilizer; the flue gas passes through the waste heat boiler and then enters the flue gas-hot water heat exchanger for heat exchange, and then is sent to the flue gas purification device, using the solution of biomass gasification plus gas boiler plus steam heat accumulator to replace the diesel boiler; biomass, as a zero-carbon energy source, can solve the problem of carbon emissions from the original diesel boiler; at the same time, the cost of biomass fuel is much lower than that of diesel.

[0081] like Figure 1 and 9 As shown, the hot water heat exchange module generates high-temperature hot water after heat exchange through the flue gas-hot water heat exchanger, and the steam discharged after the cooking system generates high-temperature hot water after heat exchange through the steam-hot water heat exchanger; the waste heat of the steam discharged from the cooking system is intermittent, and in order to make full use of the intermittent waste heat, a hot water series loop is adopted; the hot water first passes through the steam-hot water heat exchanger (the temperature is 40-80°C), and then passes through the flue gas-hot water heat exchanger (stable to 120°C-130°C); finally, it is sent to the hot water-air heat exchanger through the hot water circulation pump to heat the air (the heated air temperature is 100°C-110°C); the hot water cooled after heat exchange returns to the heat exchanger for heat exchange again, forming a hot water circulation loop; the heated air passes through the biomass raw material drying device to dry the biomass raw material, reduce the moisture content of the biomass, and add a steam-hot water heat exchange system and a flue gas-hot water heat exchange system to make full use of the flue gas waste heat and steam waste heat in the system, further saving energy and reducing carbon emissions.

[0082] like Figure 1 and 9As shown, the flue gas-hot water heat exchanger adopts the method of adding a water supply coil to a water exchange tank; the steam-hot water heat exchanger is made into a water exchange tank, and the water tank is filled with water; the needs of thermal expansion and contraction are met; when the medical waste steam is discharged, the instantaneous heat is very large, and the heat is absorbed by the water in the water exchange tank, and a biomass fuel waste heat utilization drying system is added to reduce the moisture content of the biomass fuel by more than 10%; reduce the moisture content, increase the calorific value of the biomass gas, reduce the flue gas volume and save the system operation cost.

[0083] like Figure 2 , 3 As shown in FIG10 , the valve switching control method for steam-hot water heat exchange is applicable to the medical cooking system of the biomass gasification furnace described above, and the control method includes the following steps:

[0084] S1: When entering the steam exhaust process: valve 1 is open and valve 2 is closed;

[0085] S2: When entering the vacuum pumping process after cooking: valve 1 is closed and valve 2 is opened;

[0086] S3: When entering the vacuum pumping process before cooking: valve 1 is closed and valve 2 is opened;

[0087] S4: When entering other processes, valve 1 is closed and valve 2 is closed.

[0088] like Figure 4 As shown, the set biomass raw material amount is M1 (kg / h); the air drying air volume is M3 (kg / h); the mass of the biomass after drying is M2 (kg / h); the amount of humid hot air after heat exchange is M4 (m3 / h); the dehumidification amount of the biomass raw material is M5 (kg / h);

[0089] According to the law of conservation of mass:

[0090] M1+M3=M2+M4;

[0091] M1-M2=M5.

[0092] like Figure 4 As shown, the biomass raw material is set: enthalpy value is H1 (kJ), specific heat capacity is C1 (kJ / (kg*℃)), temperature is T1 (℃); the air drying wind is set: enthalpy value is H3 (kJ), specific heat capacity is C3 (kJ / (kg*℃)), temperature is T3 (℃); the enthalpy value of the biomass after drying is set to H2 (kJ), specific heat capacity is C2 (kJ / (kg*℃)), temperature is T2 (℃); the enthalpy value of the moist hot air after heat exchange is set to H4 (kJ), specific heat capacity is C4 (kJ / (kg*℃)), temperature is T4 (℃); the heat dissipation loss of the biomass raw material drying device is Q heat dissipation 1 (kJ), and the heat dissipation loss is considered to be 5% according to the law of conservation of energy:

[0093] H1+H3=H2+H4+Q heat dissipation;

[0094] H1=M1×C1×T1;

[0095] H2=M2×C2×T2;

[0096] H3=M3×C3×T3;

[0097] H4=M4×C4×T4;

[0098] Q heat dissipation = 5% × (H1 + H3).

[0099] like Figure 5 As shown, the hot water mass is set to M6 (kg / h); the ambient air is set: the enthalpy value is H3' (kJ), the specific heat capacity is C3' (kJ / (kg*℃)), and the temperature is T3' (℃); the hot water is set: the enthalpy value is H6 (kJ), the specific heat capacity is C6 (kJ / (kg*℃)), and the temperature is T6 (℃); the cold water is set: the enthalpy value is H6' (kJ), the specific heat capacity is C6' (kJ / (kg*℃)), and the temperature is T6' (℃); the heat dissipation loss of the hot water air heat exchanger is Q heat dissipation 2 (kJ), and the heat dissipation loss is considered to be 2% according to the law of conservation of energy:

[0100] H6-H6'=H3-H3'-Q heat dissipation 2;

[0101] H3'=M3×C3'×T3';

[0102] H6=M6×C6×T6;

[0103] H6'=M6×C6'×T6';

[0104] Q heat dissipation 2 = 2% × (H6 - H6').

[0105] like Figure 6 As shown, the set flue gas mass is M7 (kg / h); the flue gas before heat exchange is set: enthalpy is H7 (kJ), specific heat capacity is C7 (kJ / (kg*℃)), temperature is T7 (℃); the flue gas after heat exchange is set: enthalpy is H7' (kJ), specific heat capacity is C7' (kJ / (kg*℃)), temperature is T7' (℃); the intermediate water is set: enthalpy is H6" (kJ), specific heat capacity is C6" (kJ / (kg*℃)), temperature is T6" (℃); the heat loss of the flue gas-hot water heat exchanger is Q heat dissipation 3 (kJ), and the heat loss is considered to be 2% according to the law of conservation of energy:

[0106] H7-H7'=H6-H6”-Q heat dissipation 3;

[0107] H6”=M6×C6”×T6”;

[0108] H7=M7×C7×T7;

[0109] H7' = M7 × C7' × T7';

[0110] Q heat dissipation 3 = 2% × (H7-H7').

[0111] like Figure 7 and 8 As shown, the steam quality is set to M8 (kg / h); boiler feed water is M9 (kg / h); steam before heat exchange is set: enthalpy is H8 (kJ), specific heat capacity is C8 (kJ / (kg*℃)), temperature is T8 (℃); condensed water after heat exchange is set: enthalpy is H8' (kJ), specific heat capacity is C8' (kJ / (kg*℃)), temperature is T8' (℃); boiler feed water before heat exchange is set: enthalpy is H9 (kJ), specific heat capacity is C9 (kJ / (kg*℃)), temperature is T9 (℃); boiler feed water after heat exchange is set: enthalpy is H9' (kJ), specific heat capacity is C9' (kJ / (kg*℃)), temperature is T9' (℃); heat dissipation loss of steam-hot water heat exchanger is Q heat dissipation 4 (kJ), heat dissipation loss is considered as 2% according to the law of conservation of energy:

[0112] H8-H8'+H9-H9'=H6”-H6'-Q heat dissipation 4;

[0113] H8 = M8 × C8 × T8;

[0114] H8' = M8 × C8' × T8';

[0115] H9=M9×C9×T9;

[0116] H9' = M9 × C9' × T9';

[0117] Q heat dissipation 4 = 2% × (H8-H8'+H9-H9');

[0118] Under the premise of appropriate biomass raw material layer thickness, it is reasonable to use hot air temperature of about 120℃ to dry biomass raw materials. If the temperature is too low (below 70℃), the drying process will be too slow, and if the temperature is too high (over 150℃), the risk of fuel combustion and spontaneous combustion will be greatly increased. Under the premise that the heat exchange rate is lower than the rated value, hot air direct drying ensures the stability of the air volume and allows appropriate temperature fluctuations; although the flue gas after biomass gasification has undergone desulfurization, denitrification, dust removal and other processes, it can meet the emission standards and meet the emission standards. However, there are still a certain amount of pollutants. According to the experience of the biomass gasification industry, the temperature of flue gas waste heat utilization is required to be controlled above 130°C to reduce the impact of low-temperature corrosion; when the heat exchange area is constant, when the heat exchange rate of the hot water-air heat exchanger is lower than the rated heat exchange rate, the operation mode is to keep the hot water temperature constant and reduce the amount of hot water; when the heat exchange area is constant, when the heat exchange rate of the steam-hot water heat exchanger is lower than the rated heat exchange rate, the operation mode is to keep the hot water temperature constant and reduce the amount of hot water; when the heat exchange area is constant, when the heat exchange rate of the flue gas-hot water heat exchanger is lower than the rated heat exchange rate, the operation mode is to keep the hot water temperature constant and reduce the amount of hot water.

[0119] Working principle: The biomass raw material first passes through the biomass raw material drying device (and a bypass is set up not to pass through the biomass raw material drying device), and then is sent to the biomass gasifier through the biomass feeding system. After the fuel is gasified in the gasifier, three products are formed: biomass charcoal, biomass gas, and biomass tar; the biomass charcoal is sent to the biomass charcoal bin after passing through the water-cooled charcoal discharge device; the biomass gas and biomass tar are sent to the adiabatic combustion chamber for combustion with the gas booster fan; the high-temperature flue gas generated after combustion enters the waste heat boiler, and the waste heat boiler generates qualified steam and sends it to the heat accumulator or directly to the high-temperature steam sterilizer; the flue gas passes through the waste heat boiler and then enters the flue gas-hot water heat exchanger for heat exchange, and then is sent to the flue gas purification device; The steam waste heat discharged from the hot cooking system is intermittent. In order to make full use of the intermittent waste heat, a hot water series loop is adopted; the hot water first passes through the steam-hot water heat exchanger (the temperature is 40-80℃), and then passes through the flue gas-hot water heat exchanger (stable to 120℃-130℃); finally, it is sent to the hot water-air heat exchanger through a hot water circulation pump to heat the air (the heated air temperature is 100℃-110℃); the hot water cooled after heat exchange returns to the heat exchanger for heat exchange again, forming a hot water circulation loop; the heated air passes through the biomass raw material drying device to dry the biomass raw material, and the steam-hot water heat exchanger is made into a water exchange tank, which is filled with water to meet the needs of thermal expansion and contraction.

[0120] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A medical cooking system of a biomass gasifier, comprising a central processing unit module, a raw material drying module, a feeding module, a gasifier module, a water-cooled charcoal outlet module, a biomass charcoal bin module, a combustion chamber module, a waste heat boiler module, a high-temperature steam sterilization module, a hot water heat exchange module and a flue gas purification module; the central processing unit module and the raw material drying module are connected by signals; the raw material drying module and the feeding module are connected by signals; the feeding module and the gasifier module are connected by signals; the feeding module and the gasifier module are connected by signals; the gasifier module and the water-cooled charcoal outlet module are connected by signals; the water-cooled charcoal outlet module and the biomass charcoal bin module are connected by signals; the biomass charcoal bin module and the combustion chamber module are connected by signals; the combustion chamber module and the waste heat boiler module are connected by signals; the waste heat boiler module and the high-temperature steam sterilization module are connected by signals; the waste heat boiler module and the hot water heat exchange module are connected by signals; the combustion chamber module and the flue gas purification module are connected by signals; The central processing unit module and the raw material drying module are connected by signals: the central processing unit module is responsible for performing logical operations, data processing, and equipment control to ensure the safe operation of each process module; the raw material drying module removes excess moisture from the biomass raw material through the raw material drying device; The raw material drying module and the feeding module are connected via signals; the feeding module continuously or intermittently delivers the raw materials to the processing equipment via a feeding device; The feeder module and the gasifier module are connected via a signal; the gasifier module converts solid or liquid raw materials into combustible gas via the gasifier; The gasification furnace module and the water-cooled carbon-discharging module are connected via a signal; the water-cooled carbon-discharging module rapidly cools and transports solid products via a water-cooled carbon-discharging device; The water-cooled charcoal outlet module and the biomass charcoal bin module are connected via a signal; the biomass charcoal bin module stores materials via the biomass charcoal bin; The biomass charcoal bin module and the combustion chamber module are connected via signals; the combustion chamber module converts fuel into heat energy through the combustion chamber; The combustion chamber module and the waste heat boiler module are connected via signals; the waste heat boiler module recovers excess heat through the waste heat boiler; The waste heat boiler module and the high-temperature steam sterilization module are provided with a signal connection; the high-temperature steam sterilization module sterilizes the steam quickly and reliably through a high-temperature steam sterilization pot; The waste heat boiler module and the hot water heat exchange module are provided with a signal connection; the hot water heat exchange module converts the waste heat of flue gas into hot water heat energy through a flue gas-hot water heat exchanger; The combustion chamber module and the flue gas purification module are signal-connected; the flue gas purification module purifies the polluted flue gas through a flue gas purification device.

2. The medical cooking system of a biomass gasifier according to claim 1, characterized in that: The hot water heat exchange module generates high-temperature hot water after heat exchange through the flue gas-hot water heat exchanger, and the steam exhausted after the cooking system generates high-temperature hot water after heat exchange through the steam-hot water heat exchanger.

3. The medical cooking system of a biomass gasifier as claimed in claim 1, characterized in that: The flue gas-hot water heat exchanger adopts the method of a hot water exchange tank plus a water supply coil.

4. A biomass gasification furnace medical cooking method, characterized in that: The valve switching control method for steam-hot water heat exchange is applicable to a medical cooking system of a biomass gasifier as described in claims 1-3, and the control method comprises the following steps: S1: When entering the steam exhaust process: valve 1 is open and valve 2 is closed; S2: When entering the vacuum pumping process after cooking: valve 1 is closed and valve 2 is opened; S3: When entering the vacuum pumping process before cooking: valve 1 is closed and valve 2 is opened; S4: When entering other processes, valve 1 is closed and valve 2 is closed.

5. The medical cooking system of a biomass gasifier as claimed in claim 1, characterized in that: The set biomass raw material amount is M1 (kg / h); the air drying air volume is M3 (kg / h); the mass of biomass after drying is M2 (kg / h); the amount of moist hot air after heat exchange is M4 (m3 / h); the dehumidification amount of biomass raw material is M5 (kg / h); According to the law of conservation of mass: M1+M3=M2+M4; M1-M2=M5.

6. The medical cooking system of a biomass gasifier as claimed in claim 1, characterized in that: The biomass raw material is set as follows: enthalpy value is H1 (kJ), specific heat capacity is C1 (kJ / (kg*℃)), temperature is T1 (℃); air drying wind is set as follows: enthalpy value is H3 (kJ), specific heat capacity is C3 (kJ / (kg*℃)), temperature is T3 (℃); enthalpy value after biomass drying is set as H2 (kJ), specific heat capacity is C2 (kJ / (kg*℃)), temperature is T2 (℃); enthalpy value of moist hot air after heat exchange is set as H4 (kJ), specific heat capacity is C4 (kJ / (kg*℃)), temperature is T4 (℃); heat dissipation loss of biomass raw material drying device is Q heat dissipation 1 (kJ), heat dissipation loss is considered as 5% according to the law of conservation of energy: H1+H3=H2+H4+Q heat dissipation; H1=M1×C1×T1; H2=M2×C2×T2; H3=M3×C3×T3; H4=M4×C4×T4; Q heat dissipation = 5% × (H1 + H3).

7. The medical cooking system of a biomass gasifier as claimed in claim 1, characterized in that: The hot water mass is set to M6 (kg / h); the ambient air is set: the enthalpy value is H3' (kJ), the specific heat capacity is C3' (kJ / (kg*℃)), and the temperature is T3' (℃); the hot water is set: the enthalpy value is H6 (kJ), the specific heat capacity is C6 (kJ / (kg*℃)), and the temperature is T6 (℃); the cold water is set: the enthalpy value is H6' (kJ), the specific heat capacity is C6' (kJ / (kg*℃)), and the temperature is T6' (℃); the heat dissipation loss of the hot water air heat exchanger is Q heat dissipation 2 (kJ), and the heat dissipation loss is considered to be 2% according to the law of conservation of energy: H6-H6'=H3-H3'-Q heat dissipation 2; H3'=M3×C3'×T3'; H6=M6×C6×T6; H6'=M6×C6'×T6'; Q heat dissipation 2 = 2% × (H6 - H6').

8. The medical cooking system of a biomass gasifier as claimed in claim 1, characterized in that: The flue gas mass is set to M7 (kg / h); the flue gas before heat exchange is set to: enthalpy H7 (kJ), specific heat C7 (kJ / (kg*℃)), temperature T7 (℃); the flue gas after heat exchange is set to: enthalpy H7' (kJ), specific heat C7' (kJ / (kg*℃)), temperature T7' (℃); the intermediate water is set to: enthalpy H6" (kJ), specific heat C6" (kJ / (kg*℃)), temperature T6" (℃); the heat loss of the flue gas-hot water heat exchanger is Q heat dissipation 3 (kJ), and the heat loss is considered to be 2% according to the law of conservation of energy: H7-H7'=H6-H6”-Q heat dissipation 3; H6”=M6×C6”×T6”; H7=M7×C7×T7; H7' = M7 × C7' × T7'; Q heat dissipation 3 = 2% × (H7 - H7').

9. The medical cooking system of a biomass gasifier as claimed in claim 1, characterized in that: The steam quality is set to M8 (kg / h); boiler feed water is M9 (kg / h); the steam before heat exchange is set to: enthalpy H8 (kJ), specific heat C8 (kJ / (kg*℃)), temperature T8 (℃); the condensed water after heat exchange is set to: enthalpy H8' (kJ), specific heat C8' (kJ / (kg*℃)), temperature T8' (℃); the boiler feed water before heat exchange is set to: enthalpy H9 (kJ), specific heat C9 (kJ / (kg*℃)), temperature T9 (℃); the boiler feed water after heat exchange is set to: enthalpy H9' (kJ), specific heat C9' (kJ / (kg*℃)), temperature T9' (℃); the heat dissipation loss of the steam-hot water heat exchanger is Q heat dissipation 4 (kJ), and the heat dissipation loss is considered to be 2% according to the law of conservation of energy: H8-H8'+H9-H9'=H6”-H6'-Q heat dissipation 4; H8 = M8 × C8 × T8; H8' = M8 × C8' × T8'; H9=M9×C9×T9; H9' = M9 × C9' × T9'; Q heat dissipation 4 = 2% × (H8-H8'+H9-H9').

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