CN113188254A - Device for conveying energy to heat pump by utilizing biomass energy - Google Patents
Device for conveying energy to heat pump by utilizing biomass energy Download PDFInfo
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- CN113188254A CN113188254A CN202110486131.5A CN202110486131A CN113188254A CN 113188254 A CN113188254 A CN 113188254A CN 202110486131 A CN202110486131 A CN 202110486131A CN 113188254 A CN113188254 A CN 113188254A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0275—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using solid fuel
- F24H7/0291—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using solid fuel the transfer fluid being water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
The invention provides a device for conveying energy to a heat pump by utilizing biomass energy, which relates to the technical field of biomass energy, and comprises a cold water conveying pipe and a solar heat absorption pipe, wherein the cold water conveying pipe is connected to one end of the solar heat absorption pipe; according to the invention, the slag collecting box is arranged at the lower end of the spreading plate which is obliquely arranged, biomass fuel rolls at the top end of the obliquely arranged spreading plate through reciprocating shaking of the spreading plate, incomplete combustion of the biomass fuel is reduced through uniform spreading, ash chips after being dried are formed when the biomass fuel is shaken to the lower end of the spreading plate, and the ash chips are collected through the slag collecting box, so that the pollution to the surrounding environment is reduced.
Description
The device for transferring energy to a heat pump by using biomass energy according to the present application is another technical solution which is separated from a method for transferring energy to a heat pump by using biomass energy, which is described in application No. cn202010997418.x filed 21/09/2020 by the applicant, and therefore, the present application belongs to a divisional application of a method for transferring energy to a heat pump by using biomass energy, which is described in original application No. cn202010997418. x.
Technical Field
The invention relates to the technical field of biomass energy, in particular to a device for conveying energy to a heat pump by using the biomass energy.
Background
Solar energy is used as a new energy, compared with the conventional energy, the solar energy has the advantages of rich and clean resources, convenience in development and utilization, no transportation problem and the like, and is widely applied to solar water heaters, photovoltaic power generation and the like at present. However, the problems of low energy density, large weather influence and the like exist, especially, the development is limited because the influence is large due to factors such as region, climate, season, day and night change and the like, and at present, human beings find a novel energy source, namely biomass energy which is a novel energy source which utilizes heat energy generated after combustion of crop straws, forestry residues (such as wood and wood sticks) and the like and is utilized through energy conversion, and the energy source belongs to renewable energy sources.
The heat pump is a high-efficiency energy-saving device which makes full use of low-grade heat energy. Heat can be transferred spontaneously from a high temperature object to a low temperature object, but cannot proceed spontaneously in the opposite direction. The working principle of the heat pump is a mechanical device which forces heat to flow from a low-temperature object to a high-temperature object in a reverse circulation mode, and the heat pump can obtain larger heat supply amount only by consuming a small amount of reverse circulation net work, and can effectively utilize low-grade heat energy which is difficult to apply to achieve the purpose of energy conservation.
Patent No. CN201610360757.0 discloses a light-excited biomass energy heat supply system, which mainly comprises a light energy excitation device, a biomass energy device and a heat supply device, wherein the whole system is totally regulated and controlled by an intelligent control device. Solar panel heats the intensification to cold water, and intelligent control device controls opening and close of biomass fuel boiler through the temperature that detects solar panel heating, and the heating device is carried through the heat exchange tube to the high temperature hot water that solar panel and biomass energy produced, and the hot water that heating device produced is used for heat supply, heating etc. through the thermal cycle pipeline. The invention realizes the combined heat supply of the light energy and the biomass energy by adopting a mode of exciting the biomass energy by the light energy, not only can effectively solve the problem that the solar energy is limited by weather, time and the like, but also can effectively reduce the energy consumption of the biomass fuel burned by the boiler. The system is suitable for heat supply and heating of various agricultural productions.
The existing utilization of biomass energy in the above patents still has some disadvantages in practical use, and the specific disadvantages are as follows:
when burning biomass fuel in the combustion chamber, biomass fuel gathers easily in the combustion chamber, causes thoroughly inadequately that biomass fuel utilized, extravagant biomass fuel, and biomass fuel gathers the easy shutoff inlet port in the combustion chamber back, causes biomass fuel to extinguish because of lacking oxygen when not burning completely naturally, causes biomass fuel's waste.
Disclosure of Invention
The invention aims to provide a device for conveying energy to a heat pump by utilizing biomass energy, and solves the technical problems that when biomass fuel is combusted in a combustion chamber, the biomass fuel is easy to gather in the combustion chamber, so that the biomass fuel is not completely utilized and is wasted, and after the biomass fuel is gathered in the combustion chamber, an air inlet is easy to be sealed, so that the biomass fuel is naturally extinguished due to lack of oxygen when the biomass fuel is not completely combusted, and the waste of the biomass fuel is caused.
The technical problem to be solved by the invention is realized by adopting the following technical scheme: a device for conveying energy to a heat pump by utilizing biomass energy comprises a cold water conveying pipe and a solar heat absorbing pipe, the cold water conveying pipe is connected with one end of the solar heat absorbing pipe, the solar hot water pipe is connected with the other end of the solar heat absorbing pipe, the middle part of the solar hot water pipe is provided with a temperature sensor for detecting the temperature of water flow in the solar hot water pipe, the other end of the solar hot water pipe is connected with the biomass combustion furnace, the other end of the biomass combustion furnace is connected with a heat storage water tank water inlet pipe, the other end of the water inlet pipe of the heat storage water tank is communicated with a spiral water pipe in the heat storage water tank from the bottom of the heat storage water tank, the top end of the heat storage water tank is provided with a water return pipe communicated with the other end of the spiral water pipe, and the other end of the water return pipe is communicated with the cold water conveying pipe;
the heat exchange fluid is stored in the heat storage water tank, the other side of the outer wall of the heat storage water tank is connected with a heat storage water tank water outlet pipe, the other end of the heat storage water tank water outlet pipe is communicated with a heat pump, a heat storage water tank water return pipe is arranged at the other end of the heat pump, and the other end of the heat storage water tank water return pipe is communicated with the inside of the heat storage water tank;
the biomass combustion furnace also comprises an intelligent control system, a material lifting mechanism and a biomass feed tank, wherein the biomass feed tank provides biomass fuel for the biomass combustion furnace, the material lifting mechanism is connected with the biomass feed tank and the biomass combustion furnace, the biomass fuel provided by the biomass feed tank is conveyed into the biomass combustion furnace through the material lifting mechanism, and the work among the biomass combustion furnace, the material lifting mechanism and the biomass feed tank is uniformly regulated and controlled through the intelligent control system;
the biomass feeding box comprises a feeding port arranged at the top of the biomass feeding box, a wood conveying port is formed in the bottom end of the feeding port, a plurality of cylindrical pushing rollers are symmetrically arranged on two sides of the wood conveying port, a polishing disc is arranged at the bottom end of the feeding port, the polishing disc is obliquely arranged at the bottom end of the feeding port, a plurality of quadrangular pyramid-shaped scraping teeth are arranged at the top end of the polishing disc at equal intervals, four edges of the quadrangular pyramid-shaped scraping teeth are of a rectangular structure, one edge of the quadrangular pyramid-shaped scraping teeth faces the rotating direction of the polishing disc, and a motor is arranged at the bottom end of the polishing disc for driving;
the bottom of the polishing disc obliquely arranged at the bottom end of the feed port is provided with a filter plate which is obliquely arranged, the top end of the filter plate is provided with a plurality of meshes with diamond structures, the bottom of the filter plate is provided with a chip dropping port which is communicated with the material lifting mechanism, one end of the filter plate is hinged to two sides of the inner wall of the chip dropping port, the bottom of the other end of the filter plate is provided with a double cam, a limiting plate is arranged above the filter plate positioned on one side of the double cam, the lower end of the obliquely arranged filter plate is provided with a chip collecting groove, and one side of the bottom surface of the chip collecting groove is provided with a chip cleaning port;
a slag removing plate is arranged above the filter plate and comprises a sliding cavity arranged above the slag removing plate, the slag removing plate is a square plate, a plurality of rows of chip pulling teeth arranged at equal intervals are arranged at the bottom end of the slag removing plate, and each chip pulling tooth is of a triangular rod structure;
the top of scarfing cinder board is provided with the bracing piece that stretches into to the middle part of the sliding chamber, the spout has been seted up at the bracing piece middle part of scarfing cinder board, the middle part in sliding chamber is provided with the cam, the top of cam is provided with the pin rod, the pin rod on cam top passes through the sliding fit mode and imbeds in the spout of bracing piece, the bracing piece top and the bracing piece middle part of scarfing cinder board all are equipped with the slider, are located the bracing piece top the sliding chamber inner wall is provided with the skid No. one, is located the bracing piece middle part the sliding chamber inner wall is provided with the skid No. two, is located bracing piece top and bracing piece middle part the slider passes through the sliding fit mode and installs on No. two skids or the skid.
As a preferred technical scheme of the invention, a rolling roller is arranged above the filter plate, the rolling roller is transversely arranged above the filter plate, and a plurality of spherical rolling bosses are arranged on the outer circular surface of the rolling roller at equal intervals;
as a preferred technical scheme of the invention, each pushing roller comprises conical teeth, supporting columns, movable push rods and springs, the number of the supporting columns is multiple, and two adjacent supporting columns are arranged on the outer circular surface of the pushing roller at equal intervals; each spring hole has been seted up on the top of support column, the bottom of activity push rod is embedded in the spring hole on support column top through sliding fit mode, and the embedding is in the spring hole the spring is installed to the bottom of activity push rod, the top of activity push rod is equidistant to be provided with a plurality of toper tooth.
As a preferred technical scheme of the invention, the biomass combustion furnace comprises a water storage tank, a second double cam, a combustion chamber, an air inlet, a slag collecting tank, a step baffle, a material spreading plate and an ignition device, wherein the water storage tank is arranged at the top end of the combustion chamber inside the biomass combustion furnace, the bottom end of the combustion chamber is provided with the material spreading plate which is obliquely arranged, the discharge end of the material lifting mechanism is arranged at the high end of the material spreading plate which is obliquely arranged, the ignition device is arranged at the high end of the material spreading plate which is obliquely arranged, the bottom of the low end of the material spreading plate which is obliquely arranged is provided with the slag collecting tank, and the four side walls of the combustion chamber are provided with the through air inlet at equal intervals; step baffles are arranged at the top ends of the material spreading plates at equal intervals, and a second double cam is arranged on one side of the bottom ends of the material spreading plates.
As a preferable technical scheme of the invention, the solar hot water pipe is communicated with a water storage tank in the biomass combustion furnace, and a water inlet pipe of the heat storage tank is communicated with the water storage tank to form a circulation loop.
Compared with the prior art, the invention has the beneficial effects that:
the solar heat pump system utilizes solar energy and biomass energy to jointly supply heat energy for the heat pump, all-weather heat supply which is not divided into daytime and nighttime is realized, the long-time stable work of the heat pump is ensured, when the solar illumination intensity at noon in the daytime is enough, the solar energy heats cold water in a cold water conveying pipe, the heated hot water is conveyed to the heat pump through a solar hot water pipe for heat exchange, when the sun and rain are encountered in the daytime or no solar illumination is generated at night, the temperature of the hot water discharged from the solar hot water pipe is detected through a temperature sensor, and a detected data signal is fed back to an intelligent control system; the intelligent control system uniformly regulates and controls the biomass combustion furnace, the biomass feed tank and the material lifting mechanism according to signals fed back by the temperature sensor, further heats water of the solar hot water pipe through the biomass combustion furnace, enables the temperature of the water delivered to the heat pump to reach the working requirement of the heat pump, enables the heat pump not to be affected by factors such as regional, climate, season and day and night changes during actual working, and improves the application performance of the heat pump.
The biomass feeding box comprises a feeding port arranged at the top of the biomass feeding box, so that straws, woods and the like of crops can be conveniently added into a wood conveying port, the straws and the woods added into the wood conveying port are pushed by pushing rollers at two sides and move downwards, the bottom ends of the straws and the woods moving downwards are polished by a polishing disc rotating at a high speed at the bottom of the wood conveying port, the friction force on the surfaces of the straws and the woods moving downwards is increased by using scraping teeth at the top end of the polishing disc, the bottom ends of the straws and the woods contacting with the polishing disc are ground into small-particle chips or powder by matching with the continuous pushing of the pushing rollers, the powdery biomass fuel is easier to burn, the burning efficiency of the biomass fuel is improved, the polished chips or powder small particles of the straws and the woods fall on a filter plate below through the polishing disc arranged at the bottom end of the feeding port in an inclined manner, through the reciprocal sieve of filter, with the powdered tiny particle screen out from the mesh of filter, drop and carry the material through carrying the material mechanism in falling the bits mouth of below, improve and carry the material mechanism and carry out the material, carry powdered living beings granule to the burning in the biomass combustion stove, improve biomass fuel's complete combustion rate.
The crushed or powdery small particles of the polished straws and the wood fall on the lower filter plate, the crushed or powdery small particles are obliquely placed through the filter plate and matched with the reciprocating sieving movement of the filter plate to enable the powdery small particles to fall from meshes, the crushed small particles are obliquely placed through the filter plate and matched with the reciprocating sieving movement of the filter plate by utilizing the self gravity, the crushed small particles roll downwards along the inclined plane at the top end of the filter plate to fall in a scrap collecting groove, the crushed and unqualified biomass combustion is intensively collected, the recycling and reprocessing are convenient, the waste of biomass fuel is reduced, the delicacy of the biomass fuel required in the biomass combustion furnace is improved, and the combustion thoroughness of the biomass fuel in the biomass combustion furnace is improved.
Fourthly, the rolling roller is arranged above the filter plate and transversely arranged above the filter plate, rolling and grinding the crumb or powder small particles ground by the grinding disc, further rolling and grinding the crumb or powder small particles ground by the grinding disc into powder small particles by the rolling roller through the reciprocating sieving of the filter plate and the continuous rotation of the rolling roller, a plurality of spherical rolling bosses are arranged on the outer circular surface of the rolling roller at equal intervals, the rolling bosses increase the surface friction with the small crumb or powder particles on the filter plate, through the rotary motion who rolls the cylinder, make roll the cylinder and promote piece form or powdered tiny particle to the middle part of filter rolling the in-process, reduce the tiny particle that the dish of polishing was polished and gather at the high-end position of filter, improve the smooth and easy nature that piece form or powdered tiny particle flow on the filter.
Fifthly, the invention is provided with the slag removing plate above the filter plate, the scrap-shaped or powdery small particles above the filter plate are stirred by the scrap stirring teeth at the bottom end of the slag removing plate and are uniformly spread on the filter plate by matching with the reciprocating sieving movement of the filter plate, thereby being beneficial to accelerating the falling speed of the powdery small particles from the meshes of the filter plate,
sixth, the invention arranges flexible push rods on the outer circle surface of each material pushing roller at equal intervals, the crop straws and the wood added into the wood conveying port are clamped and fixed through the movable push rod, and the crop straws and the wood in the wood conveying port are adaptively abducted through a spring in the movable push rod, so that the crop straws and the wood added in the wood conveying port are clamped and pushed downwards by the movable push rod, the surfaces of the crop straws and the wood are fastened through a plurality of conical teeth arranged at equal intervals at the top end of the movable push rod, so that the friction force between the movable push rod and the surfaces of the crop straws and the wood is increased, the surfaces of the crop straws and the wood are pricked into the grinding disc at equal intervals through the plurality of conical teeth, the surface hardened skins of the crop straws and the wood are damaged, the strength of the crop straws and the wood is reduced, and the grinding efficiency of the grinding disc on the crop straws and the wood is improved.
Seventhly, the biomass combustion furnace comprises a water storage tank, the water storage tank is arranged at the top end of the combustion chamber in the biomass combustion furnace, the bottom end of the combustion chamber is provided with an inclined spreading plate, a material lifting mechanism puts powdery biomass fuel at the high end of the inclined spreading plate for putting, an ignition device is convenient for igniting the biomass fuel in the combustion chamber, the ignited powdery biomass fuel is combusted in the combustion chamber to heat water in the water storage tank above, the ignited powdery biomass fuel rolls down through the inclined spreading plate and is matched with the reciprocating shaking of the spreading plate to uniformly spread the powdery biomass fuel on the top surface of the spreading plate, the biomass fuel is uniformly spread and has large contact area with oxygen in cooperation with an air inlet of the combustion chamber, and the combustion efficiency of the biomass fuel is improved, and incomplete combustion of the biomass fuel is reduced by uniformly spreading.
And eighthly, the slag collecting box is arranged at the lower end of the spreading plate which is obliquely arranged, the biomass fuel rolls at the top end of the obliquely arranged spreading plate through the reciprocating shaking of the spreading plate, and when the biomass fuel is shaken to the lower end of the spreading plate, ash and dust which are burnt to be dry are formed and collected through the slag collecting box, so that the pollution to the surrounding environment is reduced.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a flow chart of the method steps for energy delivery to a heat pump using biomass energy according to the present invention;
FIG. 2 is a schematic diagram of the structural connection of the present invention for energy delivery to a heat pump by using biomass energy;
FIG. 3 is a schematic cross-sectional view of a biomass feed tank coupled to a biomass burner according to the present invention;
FIG. 4 is a schematic view of a scraping tooth configuration at the top end of the grinding disc of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 3 taken at B in the present specification;
FIG. 6 is a schematic structural view of the conical teeth distributed on the outer circumferential surface of the pushing roller at equal intervals;
FIG. 7 is an enlarged view of a portion of FIG. 3 illustrating the present invention;
FIG. 8 is a schematic view of the construction of the milling drum of the present invention;
FIG. 9 is a schematic view of the filter plate of the present invention;
in the figure: 1. cold water conveying pipe, 2, solar heat absorbing pipe, 3, solar hot water pipe, 4, water return pipe, 5, heat storage water tank, 6, heat exchange fluid, 7, heat storage water tank outlet pipe, 8, heat pump, 9, heat storage water tank water return pipe, 10, spiral water pipe, 11, heat storage water tank inlet pipe, 12, temperature sensor, 13, intelligent control system, 14, biomass combustion furnace, 1401, water storage tank, 1402 double cam, 1403, combustion chamber, 1404, air inlet, 1405, slag collecting tank, 1406, step baffle, 1407, spreading plate, 1408, ignition device, 15, material lifting mechanism, 1501, second motor, 16, biomass feeding tank, 1601, feeding port, 1602, gear transmission cavity, 1603, material pushing roller, 1604, wood conveying port, 1605, grinding disc, 1606, first motor, 1607, filter plate, 1608, chip dropping port, 1609, chip collecting tank, 1610, chip cleaning port, 1611. the slag cleaning plate comprises a slag cleaning plate 1612, supporting legs, 1613, a sliding cavity, 1614, a first sliding frame, 1615, a sliding block, 1616, scraping teeth, 1617, a cam, 1618, a sliding chute, 1619, a second sliding frame, 1620, chip pulling teeth, 1621, meshes, 1622, a rolling boss, 1623, a pressing plate, 1624, conical teeth, 1625, a supporting column, 1626, a movable push rod, 1627, a spring, 1628, a double cam, 1629, a limiting plate, 1630, a rolling roller, 17 and a water replenishing pipe.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described below by combining with the specific drawings, and it is to be noted that the embodiments and the features in the embodiments can be combined with each other in the application without conflict.
Please refer to fig. 1-9, which are schematic overall structural diagrams illustrating a method for delivering energy to a heat pump by using biomass energy;
a method for utilizing biomass energy to carry out energy delivery on a heat pump comprises the following steps:
s1, solar heating: cold water is supplied to the solar heat absorption pipe 2 through the cold water conveying pipe 1, the solar heat absorption pipe 2 absorbs the heat energy of sunlight, the cold water flowing through the solar heat absorption pipe 2 is heated and heated, and the heated and heated hot water is discharged through the solar hot water pipe 3;
s2, heat energy transmission: hot water heated by the solar heat absorption pipe 2 in the step S1 is conveyed to the spiral water pipe 10 in the heat storage water tank 5 through the solar hot water pipe 3, and the spiral water pipe 10 exchanges heat with the heat exchange fluid 6 in the heat storage water tank 5; the temperature of the heat exchange flowing liquid 6 is raised, the heat exchange flowing liquid 6 is conveyed into a heat pump 8 through a water outlet pipe 7 of the heat storage water tank to convey energy to the heat exchange flowing liquid 6, and the heat exchange flowing liquid 6 after heat exchange returns to the heat storage water tank 5 through a water return pipe 9 of the heat storage water tank to store heat again;
s3, temperature detection: the temperature of the hot water heated and heated by the solar heat absorption pipe 2 in the step S1 is detected, the temperature of the hot water discharged from the solar hot water pipe 3 is detected by the temperature sensor 12, and the detected data signal is fed back to the intelligent control system 13;
s4, biomass energy heat supply: in step S3, when the temperature sensor 12 detects that the temperature of the hot water discharged from the solar hot water pipe 3 is too low, the intelligent control system 13 starts the biomass combustion furnace 14 to further heat the hot water in the solar hot water pipe 3;
s5, heat energy transmission: in step S4, the hot water further heated by the biomass combustion furnace 14 is sent to the spiral water pipe 10 through the hot water tank inlet pipe 11, and the spiral water pipe 10 exchanges heat with the heat exchange hydraulic fluid 6 in the hot water tank 5; the temperature of the heat exchange flowing liquid 6 is raised, the heat exchange flowing liquid 6 is conveyed into a heat pump 8 through a water outlet pipe 7 of the heat storage water tank to convey energy to the heat exchange flowing liquid 6, and the heat exchange flowing liquid 6 after heat exchange returns to the heat storage water tank 5 through a water return pipe 9 of the heat storage water tank to store heat again;
the method for delivering energy to a heat pump by using biomass energy described in the above steps S1-S4 further relates to a device for delivering energy to a heat pump by using biomass energy, the cold water conveying pipe 1 is connected to one end of a solar heat absorption pipe 2, a solar hot water pipe 3 is connected to the other end of the solar heat absorption pipe 2, a temperature sensor 12 for detecting the temperature of water flow in the solar hot water pipe 3 is installed in the middle of the solar hot water pipe 3, the other end of the solar hot water pipe 3 is connected to a biomass combustion furnace 14, the other end of the biomass combustion furnace 14 is connected with a heat storage water tank water inlet pipe 11, the other end of the heat storage water tank water inlet pipe 11 is communicated with a spiral water pipe 10 in the heat storage water tank 5 from the bottom of the heat storage water tank 5, a water return pipe 4 communicated with the other end of the spiral water pipe 10 is arranged at the top end of the heat storage water tank 5, and the other end of the water return pipe 4 is communicated with the cold water conveying pipe 1;
a heat exchange fluid 6 is stored in the heat storage water tank 5, the other side of the outer wall of the heat storage water tank 5 is connected with a heat storage water tank water outlet pipe 7, the other end of the heat storage water tank water outlet pipe 7 is communicated with a heat pump 8, the other end of the heat pump 8 is provided with a heat storage water tank water return pipe 9, and the other end of the heat storage water tank water return pipe 9 is communicated with the inside of the heat storage water tank 5;
wherein, the middle part of the cold water conveying pipe 1 is provided with a water replenishing pipe 17, the water replenishing pipe 17 is fixedly arranged at the other side of the heat storage water tank 5, and cold water is replenished into the heat storage water tank 5 in time when the heat exchange flowing liquid 6 in the heat storage water tank 5 is reduced.
Wherein, intelligent control system 13 is the known technology in the prior art, through opening and close of intelligent control system 13 control living beings feed tank 16, controls the opening and closing of second motor 1501 at lifting mechanism 15 top, controls ignition 1408 in biomass combustion furnace 14 and opens and close, through intelligent control system 13 unified regulation and control living beings feed tank 16, lifting mechanism 15 and biomass combustion furnace 14, realizes the cooperation work between the three.
Specifically, the heat pump 8 is supplied with heat energy jointly by solar energy and biomass energy, all-weather heat supply which is not divided into daytime and nighttime is realized, the long-time stable work of the heat pump 8 is ensured, when the solar illumination intensity at noon in the daytime is enough, the solar energy heats cold water in the cold water conveying pipe 1, the heated hot water is conveyed to the heat pump 8 through the solar hot water pipe 3 for heat exchange, when the daytime encounters cloudy and rainy days or no sunlight at night, the temperature of the hot water discharged from the solar hot water pipe 3 is detected through the temperature sensor 12, and the detected data signals are fed back to the intelligent control system 13; the intelligent control system 13 performs unified regulation and control on the biomass combustion furnace 14, the biomass feed tank 16 and the material lifting mechanism 15 according to signals fed back by the temperature sensor 12, further heats water in the solar hot water pipe 3 through the biomass combustion furnace 14, enables the temperature of the water delivered to the heat pump 8 to reach the working requirement of the heat pump 8, enables the heat pump 8 not to be affected by factors such as regional, climate, season and day and night changes during actual working, and improves the application performance of the heat pump 8.
Biomass feed box 16 comprises a feed port 1601 arranged at the top of biomass feed box 16, feed port 1601 is a V-shaped groove structure, a wood conveying port 1604 is arranged at the bottom end of feed port 1601, a plurality of cylindrical material pushing rollers 1603 are symmetrically arranged at two sides of wood conveying port 1604, two ends of each material pushing roller 1603 are arranged in gear transmission cavities 1602 through bearings, gear transmission cavities 1602 are symmetrically arranged at two sides of wood conveying port 1604, one end of each material pushing roller 1603 at each side penetrates through biomass feed box 16 through bearings and extends out of biomass feed box 16, material pushing rollers 1603 extending out of the same side of biomass feed box 16 are driven to rotate through the same V-shaped belt, each material pushing roller 1603 at the same side rotates synchronously and rotates in the same direction, material pushing rollers 1603 extending out of biomass feed box 16 are driven to rotate through independent motors, the bottom of dog-house 1601 is provided with the dish 1605 of polishing, and the slope of the dish 1605 of polishing sets up in the bottom of dog-house 1601, and the top of the dish 1605 of polishing is equidistant to be provided with the scraping tooth 1616 of a plurality of rhombus pyramid shape, the equal right angle structure in four edges and corners of the scraping tooth 1616 of rhombus pyramid shape, and one of them edges and corners orientation in the direction of rotation of the dish 1605 of polishing, and the dish 1605 bottom of polishing is provided with the drive of a motor 1606. First motor 1606 is fixedly arranged at the top end of feeding port 1601.
Specifically, the biomass feed box 16 of the present invention includes a feed port 1601 provided at the top of the biomass feed box 16, so as to add crop straws, woods, etc. into the wood conveying port 1604, the straws and woods added into the wood conveying port 1604 are pushed by the pushing rollers 1603 at both sides and move downward, the downward moving straws and the bottom ends of the woods are polished by the polishing disc 1605 rotating at a high speed at the bottom of the wood conveying port 1604, the friction force on the surfaces of the downward moving straws and the bottom ends of the woods is increased by the scraping teeth 1616 at the top end of the polishing disc 1605, the bottom ends of the straws and the bottoms of the woods contacting with the polishing disc 1605 are ground into small-particle chips or powders by the continuous pushing of the pushing rollers 1603, the powdered biomass fuel is easier to burn, the efficiency of the combustion of the biomass fuel is improved, the straws and the woods are dropped on the filter 1607 below by the chips or the polished small particles by the polishing disc 1605 obliquely arranged at the bottom end of the feed port 1601, reciprocating sieving through the filter plate 1607, sifting out the powdery small particles from the meshes 1621 of the filter plate 1607, dropping in the chip dropping port 1608 below, lifting through the lifting mechanism 15, conveying the powdery biomass particles to the biomass combustion furnace 14 for combustion, and improving the complete combustion rate of the biomass fuel.
The bottom of a polishing disc 1605 obliquely arranged at the bottom end of the feeding port 1601 is provided with a filter plate 1607 obliquely arranged, the top end of the filter plate 1607 is provided with a plurality of meshes 1621 with diamond structures, the bottom of the filter plate 1607 is provided with a chip falling port 1608, the chip falling port 1608 is communicated with the material lifting mechanism 15, one end of the filter plate 1607 is hinged to two sides of the inner wall of the chip falling port 1608, the bottom of the other end of the filter plate 1607 is provided with a double cam 1628, a limiting plate 1629 is arranged above the filter plate 1607 positioned on one side of the double cam 1628, the double cam 1628 is arranged on an independent motor, and the independent motor is fixed at the middle part of the inner wall of the chip falling port 1608; a chip collecting groove 1609 is arranged at the lower end of the filter plate 1607 which is obliquely arranged, and a chip cleaning port 1610 is arranged at one side of the bottom surface of the chip collecting groove 1609;
a slag removing plate 1611 is arranged above the filter plate 1607, the slag removing plate 1611 comprises a sliding cavity 1613 arranged above the slag removing plate 1611, the slag removing plate 1611 is a square plate, a plurality of rows of chip poking teeth 1620 arranged at equal intervals are arranged at the bottom end of the slag removing plate 1611, and each chip poking tooth 1620 is of a triangular rod structure;
the top end of the slag removing plate 1611 is provided with a support rod extending into the middle of the sliding cavity 1613, the middle of the support rod of the slag removing plate 1611 is provided with a sliding groove 1618, the middle of the sliding cavity 1613 is provided with a cam 1617, the top end of the cam 1617 is provided with a pin rod, the pin rod at the top end of the cam 1617 is embedded into the sliding groove 1618 of the support rod in a sliding fit mode, the top end of the support rod and the middle of the support rod of the slag removing plate 1611 are both provided with a sliding block 1615, the inner wall of the sliding cavity 1613 at the top end of the support rod is provided with a first sliding frame 1614, the inner wall of the sliding cavity 1613 at the middle of the support rod is provided with a second sliding frame 1619, and the sliding blocks 1615 at the top end and the middle of the support rod are installed on the corresponding second sliding frame 1619 or the first sliding frame 1614 in a sliding fit mode.
Specifically, the crushed or powdery small particles of the polished straws and woods fall on the lower filter plate 1607 and are obliquely placed through the filter plate 1607 and matched with the reciprocating sieving movement of the filter plate 1607 to enable the powdery small particles to fall from the meshes 1621, the crushed small particles are obliquely placed through the filter plate 1607 and matched with the reciprocating sieving movement of the filter plate 1607 by self gravity, the crushed small particles roll downwards along the inclined plane at the top end of the filter plate 1607 in the scrap collecting groove 1609, the unqualified biomass combustion after polishing is intensively collected, the recycling and reprocessing are facilitated, the waste of biomass fuel is reduced, the delicacy of the required biomass fuel in the biomass combustion furnace 14 is improved, and the combustion thoroughness of the biomass fuel in the biomass combustion furnace 14 is improved.
A rolling roller 1630 is arranged above the filter plate 1607, the rolling roller 1630 is transversely arranged above the filter plate 1607, and a plurality of spherical rolling bosses 1622 are arranged on the outer circumferential surface of the rolling roller 1630 at equal intervals; wherein, roll roller 1630's both ends and install the living beings feed tank 16 above the filter plate 1607 through the bearing in, and roll roller 1630's wherein one end passes living beings feed tank 16 through the bearing and stretches out to living beings feed tank 16's outside, stretch out in outside roll roller 1630 drives rotatoryly through the independent third motor that sets up, the messenger rolls roller 1630 and can autogyration, promote the middle part removal of clastic or powdered tiny particle to filter plate 1607, reduce the tiny particle after the dish 1605 of polishing and gather at the high-end position of filter plate 1607, avoid blockking up.
Specifically, the rolling roller 1630 is arranged above the filter plate 1607, the rolling roller 1630 is transversely arranged above the filter plate 1607, the crumb or powder small particles ground by the grinding plate 1605 are rolled and rolled, the reciprocating sieving of the filter plate 1607 is matched with the continuous rotation of the rolling roller 1630, the crumb or powder small particles ground by the grinding plate 1605 are further rolled and ground into powder small particles by the rolling roller 1630, a plurality of round rolling bosses 1622 are arranged at equal intervals on the outer circular surface of the rolling roller 1630, the rolling bosses 1622 increase the surface friction force with the crumb or powder small particles on the filter plate 1607, the rolling roller 1630 pushes the crumb or powder small particles to the middle part of the filter plate 1607 in the rolling process through the rotation of the rolling roller 1630, the aggregation of the crumb or powder small particles ground by the grinding plate 1605 at the high end of the filter plate 1607 is reduced, improving the smoothness of the flow of the small particles in the chip or powder form over the filter plate 1607.
Each pushing roller 1603 comprises a plurality of conical teeth 1624, a plurality of support columns 1625, a movable push rod 1626 and a plurality of springs 1627, wherein two adjacent support columns 1625 are arranged on the outer circular surface of the pushing roller 1603 at equal intervals; spring holes have been seted up on the top of each support column 1625, and the bottom of activity push rod 1626 is embedded in the spring hole on support column 1625 top through sliding fit mode, and spring 1627 is installed to the bottom of embedding in the downthehole activity push rod 1626 of spring, and the top of activity push rod 1626 sets up to square plate structure, and the top of activity push rod 1626 is equidistant to be provided with a plurality of toper tooth 1624.
Specifically, the invention arranges the slag removing plate 1611 above the filter plate 1607, stirs the crumb or powder small particles above the filter plate 1607 through the crumb stirring teeth 1620 at the bottom end of the slag removing plate 1611, and makes the crumb or powder small particles uniformly spread on the filter plate 1607 by matching with the reciprocating sifting of the filter plate 1607, which is beneficial to accelerating the falling speed of the powder small particles from the meshes 1621 of the filter plate 1607,
specifically, the invention arranges flexible push rods 1626 on the outer circumferential surface of each pushing roll 1603 at equal intervals, clamps and fixes the crop straws and the woods added into the wood conveying port 1604 through the flexible push rods 1626, adaptively abduces the crop straws and the woods in the wood conveying port 1604 through the springs 1627 in the flexible push rods 1626, so that the crop straws and the woods added into the wood conveying port 1604 are clamped and pushed downwards by the flexible push rods 1626, the surfaces of the crop straws and the woods are tightened through a plurality of conical teeth 1624 arranged at equal intervals on the top end of the flexible push rods 1626, the friction force between the flexible push rods 1626 and the surfaces of the crop straws and the woods is increased, the surfaces of the crop straws and the woods are pricked at equal intervals through a plurality of conical teeth 1624, the hardened skins of the crop straws and the woods are damaged, and the strength of the crop straws and the woods is reduced, the grinding efficiency of the grinding disc 1605 to the crop straws and the wood is improved.
Specifically, the biomass combustion furnace 14 of the present invention includes a water storage tank 1401, the water storage tank 1401 is disposed at the top end of the combustion chamber 1403 inside the biomass combustion furnace 14, the bottom end of the combustion chamber 1403 is provided with a spreading plate 1407 placed obliquely, the lifting mechanism 15 puts the powdered biomass fuel at the high end of the spreading plate 1407 placed obliquely, so that the ignition device 1408 ignites the biomass fuel in the combustion chamber 1403, the ignited powdered biomass fuel rolls down through the spreading plate 1407 placed obliquely, and the powdered biomass fuel is uniformly spread on the top surface of the spreading plate 1407 in cooperation with the reciprocating shaking of the spreading plate 1407, through scattering biomass fuel evenly, cooperation combustion chamber 1403's inlet port 1404 makes biomass fuel and oxygen area of contact big, improves biomass fuel's combustion efficiency, through scattering evenly, reduces biomass fuel's incomplete combustion.
Specifically, the slag collection box 1405 is arranged at the lower end of the inclined spreading plate 1407, the biomass fuel rolls on the top end of the inclined spreading plate 1407 through reciprocating shaking of the spreading plate 1407, and when the biomass fuel is shaken to the lower end of the spreading plate 1407, ash and dust which are burnt to dry are formed and collected through the slag collection box 1405, so that pollution to the surrounding environment is reduced.
The top end of the material spreading plate 1407 is provided with step baffles 1406 at equal intervals, and one side of the bottom end of the material spreading plate 1407 is provided with a second double cam 1402. The second double cam 1402 is mounted on an independent motor, the independent motor is mounted on the bottom surface of the slag collection box 1405, the second double cam 1402 is driven to rotate by the independent motor, the material spreading plate 1407 is driven to shake in a reciprocating manner, and the powdery biomass fuel is uniformly spread on the top surface of the material spreading plate 1407.
The solar hot water pipe 3 is communicated with a water storage tank 1401 in a biomass combustion furnace 14, a heat storage tank water inlet pipe 11 is communicated with the water storage tank 1401 to form a circulation loop, and ignited powdery biomass fuel is combusted in the combustion chamber 1403 to heat water liquid in the upper water storage tank 1401, so that the powdery biomass fuel is combusted in the combustion chamber 1403 and has structural firmness.
The working principle of the biomass feed tank is as follows:
the top of the biomass feed box 16 of the invention is provided with a feed port 1601 which is convenient for adding crop straws, woods and the like into a wood conveying port 1604, the straws and the woods added into the wood conveying port 1604 are pushed by pushing rollers 1603 at two sides and move downwards, the pushing rollers 1603 push the straws and the woods to move, the straws and the woods are pricked into the surfaces of the crop straws and the woods at equal intervals through a plurality of conical teeth 1624 in the process of pushing the straws and the woods to damage the hardened skins of the crop straws and the woods and reduce the strength of the crop straws and the woods, then, the downwards moving straws and the bottom ends of the woods are polished by a polishing disc 1605 rotating at high speed at the bottom of the wood conveying port 1604, the friction force on the surfaces of the downwards moving straws and the bottom ends of the woods is increased through scraping teeth 1616 at the top end of the polishing disc 1605, and the bottom ends of the straws and the woods contacted with the polishing disc 1605 are ground into small-particle-shaped or powder in cooperation with the continuous pushing of the pushing rollers 1603, the chippy or powdery small particles of the polished straws and woods fall on the filter plate 1607 below, the chips or the powdery small particles are pushed to the middle part of the filter plate 1607 in the grinding process by the grinding roller 1630 in cooperation with the rotation of the grinding roller 1630 above the filter plate 1607, the chips or the powdery small particles above the filter plate 1607 are pushed by the slag removing plate 1611 which swings in a reciprocating manner, the chips or the powdery small particles are uniformly spread on the filter plate 1607, the chips or the powdery small particles are obliquely placed through the filter plate 1607, the chips or the powdery small particles are downwards rolled in the chip collecting groove 1609 along the inclined plane at the top end of the filter plate 1607 by the self gravity, the unqualified biomass combustion after grinding is intensively collected, and finally the powdery small particles are screened out of the meshes 1621 of the filter plate 1607, the chips falling into the chip falling port 1608 are lifted by the lifting mechanism 15, and the powdery biomass particles are conveyed into the biomass combustion furnace 14 for combustion, so that the complete combustion rate of the biomass fuel is improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A device for conveying energy to a heat pump by utilizing biomass energy is characterized by comprising a cold water conveying pipe and a solar heat absorption pipe, the cold water conveying pipe is connected with one end of the solar heat absorbing pipe, the solar hot water pipe is connected with the other end of the solar heat absorbing pipe, the middle part of the solar hot water pipe is provided with a temperature sensor for detecting the temperature of water flow in the solar hot water pipe, the other end of the solar hot water pipe is connected with the biomass combustion furnace, the other end of the biomass combustion furnace is connected with a heat storage water tank water inlet pipe, the other end of the water inlet pipe of the heat storage water tank is communicated with a spiral water pipe in the heat storage water tank from the bottom of the heat storage water tank, the top end of the heat storage water tank is provided with a water return pipe communicated with the other end of the spiral water pipe, and the other end of the water return pipe is communicated with the cold water conveying pipe;
the heat exchange fluid is stored in the heat storage water tank, the other side of the outer wall of the heat storage water tank is connected with a heat storage water tank water outlet pipe, the other end of the heat storage water tank water outlet pipe is communicated with a heat pump, a heat storage water tank water return pipe is arranged at the other end of the heat pump, and the other end of the heat storage water tank water return pipe is communicated with the inside of the heat storage water tank;
the biomass combustion furnace also comprises an intelligent control system, a material lifting mechanism and a biomass feed tank, wherein the biomass feed tank provides biomass fuel for the biomass combustion furnace, the material lifting mechanism is connected with the biomass feed tank and the biomass combustion furnace, the biomass fuel provided by the biomass feed tank is conveyed into the biomass combustion furnace through the material lifting mechanism, and the work among the biomass combustion furnace, the material lifting mechanism and the biomass feed tank is uniformly regulated and controlled through the intelligent control system;
the biomass feeding box comprises a feeding port arranged at the top of the biomass feeding box, a wood conveying port is formed in the bottom end of the feeding port, a plurality of cylindrical pushing rollers are symmetrically arranged on two sides of the wood conveying port, a polishing disc is arranged at the bottom end of the feeding port, the polishing disc is obliquely arranged at the bottom end of the feeding port, a plurality of quadrangular pyramid-shaped scraping teeth are arranged at the top end of the polishing disc at equal intervals, four edges of the quadrangular pyramid-shaped scraping teeth are of a rectangular structure, one edge of the quadrangular pyramid-shaped scraping teeth faces the rotating direction of the polishing disc, and a motor is arranged at the bottom end of the polishing disc for driving;
the bottom of the polishing disc obliquely arranged at the bottom end of the feed port is provided with a filter plate which is obliquely arranged, the top end of the filter plate is provided with a plurality of meshes with diamond structures, the bottom of the filter plate is provided with a chip dropping port which is communicated with the material lifting mechanism, one end of the filter plate is hinged to two sides of the inner wall of the chip dropping port, the bottom of the other end of the filter plate is provided with a double cam, a limiting plate is arranged above the filter plate positioned on one side of the double cam, the lower end of the obliquely arranged filter plate is provided with a chip collecting groove, and one side of the bottom surface of the chip collecting groove is provided with a chip cleaning port;
a slag removing plate is arranged above the filter plate and comprises a sliding cavity arranged above the slag removing plate, the slag removing plate is a square plate, a plurality of rows of chip pulling teeth arranged at equal intervals are arranged at the bottom end of the slag removing plate, and each chip pulling tooth is of a triangular rod structure;
the top of scarfing cinder board is provided with the bracing piece that stretches into to the middle part of the sliding chamber, the spout has been seted up at the bracing piece middle part of scarfing cinder board, the middle part in sliding chamber is provided with the cam, the top of cam is provided with the pin rod, the pin rod on cam top passes through the sliding fit mode and imbeds in the spout of bracing piece, the bracing piece top and the bracing piece middle part of scarfing cinder board all are equipped with the slider, are located the bracing piece top the sliding chamber inner wall is provided with the skid No. one, is located the bracing piece middle part the sliding chamber inner wall is provided with the skid No. two, is located bracing piece top and bracing piece middle part the slider passes through the sliding fit mode and installs on No. two skids or the skid of correspondence.
2. The method for energy transfer to a heat pump by using biomass as claimed in claim 1, wherein a rolling drum is arranged above the filter plate, the rolling drum is transversely arranged above the filter plate, and a plurality of spherical rolling bosses are arranged on the outer circumferential surface of the rolling drum at equal intervals.
3. The method for energy delivery to the heat pump by using biomass energy as claimed in claim 1, wherein each pushing roller comprises a plurality of conical teeth, supporting pillars, movable push rods and springs, and two adjacent supporting pillars are arranged on the outer circumferential surface of the pushing roller at equal intervals; each spring hole has been seted up on the top of support column, the bottom of activity push rod is embedded in the spring hole on support column top through sliding fit mode, and the embedding is in the spring hole the spring is installed to the bottom of activity push rod, the top of activity push rod is equidistant to be provided with a plurality of toper tooth.
4. The method for transporting energy to a heat pump by using biomass energy as claimed in claim 1, wherein the biomass combustion furnace comprises a water storage tank, a second double cam, a combustion chamber, air inlet holes, a slag collecting tank, a step baffle, a material spreading plate and an ignition device, the water storage tank is arranged at the top end of the combustion chamber inside the biomass combustion furnace, the bottom end of the combustion chamber is provided with an inclined material spreading plate, the discharge end of the material lifting mechanism is arranged at the high end of the inclined material spreading plate, the ignition device is arranged at the high end of the inclined material spreading plate, the bottom of the inclined material spreading plate at the low end is provided with the slag collecting tank, and the four side walls of the combustion chamber are provided with the through air inlet holes at equal intervals; step baffles are arranged at the top ends of the material spreading plates at equal intervals, and a second double cam is arranged on one side of the bottom ends of the material spreading plates.
5. The method for transporting energy to a heat pump by utilizing biomass energy as claimed in claim 4, wherein the solar hot water pipe is communicated with a water storage tank in the biomass combustion furnace, and the water inlet pipe of the heat storage tank is communicated with the water storage tank to form a circulation loop.
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| CN202110486131.5A CN113188254A (en) | 2020-09-21 | 2020-09-21 | Device for conveying energy to heat pump by utilizing biomass energy |
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| CN202010997418.XA CN112066554B (en) | 2020-09-21 | 2020-09-21 | Method for carrying out energy transmission on heat pump by utilizing biomass energy |
| CN202110486131.5A CN113188254A (en) | 2020-09-21 | 2020-09-21 | Device for conveying energy to heat pump by utilizing biomass energy |
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| CN202010997418.XA Division CN112066554B (en) | 2020-09-21 | 2020-09-21 | Method for carrying out energy transmission on heat pump by utilizing biomass energy |
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| CN202110486131.5A Withdrawn CN113188254A (en) | 2020-09-21 | 2020-09-21 | Device for conveying energy to heat pump by utilizing biomass energy |
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Also Published As
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| CN112066554A (en) | 2020-12-11 |
| CN112066554B (en) | 2021-05-21 |
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Application publication date: 20210730 |