CN111853844A - Waste heat recycling device and using method - Google Patents
Waste heat recycling device and using method Download PDFInfo
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- CN111853844A CN111853844A CN202010636631.8A CN202010636631A CN111853844A CN 111853844 A CN111853844 A CN 111853844A CN 202010636631 A CN202010636631 A CN 202010636631A CN 111853844 A CN111853844 A CN 111853844A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
- F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The invention discloses a waste heat recycling device, which comprises a boiler and a primary heat exchanger, wherein a primary heat exchanger main body is arranged on the right side of the boiler, a first air inlet pipeline is fixedly welded on one side of the boiler, a first valve is arranged on the first air inlet pipeline, an air inlet cavity is arranged on one side of the primary heat exchanger main body, one end, far away from the boiler, of the first air inlet pipeline is fixedly welded on the air inlet cavity, a first cleaning pipe is arranged on the air inlet cavity, a spiral pipe is arranged inside the primary heat exchanger main body, a first water inlet pipe is arranged at the top of the primary heat exchanger main body, a first water outlet pipe is arranged at the bottom of the primary heat exchanger main body, one end of the first water outlet pipe is connected with a primary heat utilization unit, the invention ensures high-efficiency utilization of heat through double heat exchange of the primary heat exchanger and a secondary heat exchanger, waste is, the arrangement of the protective equipment and the filter greatly reduces the emission of polluted flue gas and protects the environment.
Description
Technical Field
The invention relates to the field of waste heat recycling equipment, in particular to waste heat recycling equipment and a using method thereof.
Background
In recent years, the government of China highly attaches importance to the development of low-carbon, environment-friendly and environment-friendly economy, and the requirements are that energy is saved, internal consumption is reduced, and the problems of energy shortage, greenhouse effect, environmental deterioration and the like are alleviated while the economic development is guaranteed. Under such a background, energy saving and environmental protection become important contents for future development, and waste heat recycling has therefore gained wide attention as an effective way and method therein.
The industrial waste heat resources in China are rich and widely exist in the production process of various industries in industry, the waste heat resources account for 17% -67% of the total fuel consumption, the recovery rate can reach 60%, the waste heat utilization rate is large in improvement space, the energy-saving potential is huge, the industrial waste heat recovery is considered as a new energy source, and the industrial waste heat recovery becomes an important content for promoting the energy-saving and emission-reducing work in China in recent years. The existing waste heat recycling equipment has the problems of incapability of efficiently exchanging heat, insufficient heat exchange, energy loss and waste, difficulty in cleaning in the equipment, incapability of discharging condensed water to cause equipment damage and random emission of a large amount of polluted flue gas to cause environmental damage and pollution.
In order to solve the above-mentioned drawbacks, a technical solution is now provided.
Disclosure of Invention
The invention aims to provide waste heat recycling equipment and a using method thereof.
The technical problems to be solved by the invention are as follows:
how through an effectual mode, solve the unable high-efficient heat transfer of current waste heat recovery equipment, the heat transfer does not fully cause the loss and the waste of energy, is difficult for wasing in the equipment, and the unable discharge of comdenstion water causes equipment damage and has a large amount of the random emission of contaminated flue gas to cause the problem of environmental destruction and pollution.
The purpose of the invention can be realized by the following technical scheme:
a waste heat recycling device comprises a boiler and a primary heat exchanger, wherein the primary heat exchanger is positioned on the right side of the boiler and comprises a primary heat exchanger main body, an air inlet cavity is formed in one side of the primary heat exchanger main body, a first air inlet pipeline is arranged on the air inlet cavity and is positioned outside the heat exchanger main body, one end, away from the air inlet cavity, of the first air inlet pipeline is fixed on one side of the boiler, a first valve is arranged on the first air inlet pipeline, a first cleaning pipe is arranged on the air inlet cavity, a spiral pipe is arranged inside the primary heat exchanger main body, a first water inlet pipe is arranged at the top of the primary heat exchanger main body, a first water outlet pipe is arranged at the bottom of the primary heat exchanger main body, one end of the first water outlet pipe is connected with a primary heat utilization unit, and an air outlet cavity is arranged at the, a second cleaning pipe is arranged on one side of the air outlet cavity, a first air outlet pipeline is fixedly welded on the top of the air outlet cavity, and a second valve is arranged on the first air outlet pipeline;
The right side of the primary heat exchanger is provided with a secondary heat exchanger, the secondary heat exchanger comprises a first condenser, a second condenser and a condenser main body, two second air inlet pipelines are arranged on the first air outlet pipeline, the condenser main body is installed on the end of the second air inlet pipeline, two heat exchange water pipes are arranged inside the condenser main body, a flue gas channel is arranged at the interval of the heat exchange water pipes, a second air outlet pipeline is arranged at one end, away from the second air inlet pipeline, of the condenser main body, a filter is arranged on the second air outlet pipeline, the filter comprises a filter main body, a rubber sealing ring is fixedly bonded on the inner wall of the filter main body, a filter sheet is fixedly arranged inside the filter main body through a clamping groove, an iron ring is arranged outside the filter sheet, and a filter layer is arranged inside the filter sheet;
the bottom of the secondary heat exchanger is provided with a water circulation system, the water circulation system comprises a hot water tank, the top of the hot water tank is provided with a first water pipe, the first water pipe is provided with a first water pump, one end of the first water pipe, far away from the hot water tank, is connected with a first condenser, a second water pipe is arranged between one sides, close to the filter, of the first condenser and the second condenser, the side, far away from the filter, of the first condenser and the side, far away from the filter, of the second condenser are provided with a third water pipe, the bottom of the first condenser is provided with a first condensation pipe, the first condensation pipe is connected with the third water pipe, one end, far away from the first water pipe, of the first condenser is provided with a fourth water pipe, one end, far away from the first condenser, of the fourth water pipe is connected with the hot water tank, one side of the hot water tank is provided with a fifth water pipe, one side of the hot water tank is provided with a secondary heat, and a sixth water pipe is arranged on one side of the secondary heat utilization unit, the sixth water pipe and the fifth water pipe are arranged on the same side, a second water pump is arranged on the sixth water pipe, and one end, far away from the secondary heat utilization unit, of the second water pump is connected with the hot water tank.
Furthermore, two ends of the spiral pipe are respectively connected with the air inlet cavity and the air outlet cavity.
Further, heat exchange water pipe is parallel with condenser main part axis, separates each other and establishes ties each other, first condenser pipe is parallel to each other with the second condenser pipe.
Furthermore, the flue gas channel is respectively connected with a second gas inlet pipeline and a second gas outlet pipeline.
Furthermore, the material of the filter is a synthetic fiber filter material.
Furthermore, the first water pipe, the second water pipe, the third water pipe and the fourth water pipe are communicated with each other and form a closed loop with the first condenser, the second condenser and the hot water tank.
A use method of waste heat recycling equipment specifically comprises the following steps:
the method comprises the following steps: opening a first water inlet pipe to enable the main body of the primary heat exchanger to be filled with normal-temperature water, enabling a large amount of high-temperature flue gas generated by reaction in the boiler to enter the primary heat exchanger through a first air inlet pipeline, enabling the temperature of the flue gas to be about DEG C, enabling the flue gas to firstly enter an air inlet cavity through the first air inlet pipeline and then enter a spiral pipe, and enabling the contacted normal-temperature water to be changed into high-temperature water with the temperature about DEG C for a primary heat utilization unit to use;
step two: the temperature of the secondary flue gas is 180 ℃, the secondary flue gas enters a first gas outlet pipeline through a gas outlet cavity, a first water pump is turned on at the moment, normal-temperature water in a hot water tank is fed into a first condenser along a first water pipe and then fed into a second condenser through a second water pipe, the secondary flue gas enters a second gas inlet pipeline along with the second water pipe, the secondary flue gas is indirectly contacted with the first condenser and the second condenser through a flue gas channel to transfer heat, the secondary flue gas is finally changed into low-temperature flue gas and then discharged into the atmosphere after passing through a filter, the normal-temperature water in the first condenser and the second condenser is changed into high-temperature water with the temperature of about the temperature after being indirectly contacted, the high-temperature water enters the hot water tank along a third water pipe and a fourth water pipe, and finally enters a secondary heat utilization unit through a fifth;
Step three: in use, because long-term use leads to producing in the spiral pipe that the smoke and dust is remained, close first valve and second valve this moment, inject into the clean water washing simultaneously in the first scavenge pipe and can, dirty water after the washing can be discharged by the second scavenge pipe. When the secondary heat exchanger is used, a large amount of condensed water can be generated in the condensation pipe main body, and the condensed water can flow into the third water pipe and the fourth water pipe from the first condensation pipe and the second condensation pipe respectively and then flow into the hot water tank.
The invention has the beneficial effects that: the invention ensures the high-efficiency utilization of heat through the double heat exchange of the primary heat exchanger and the secondary heat exchanger, avoids waste, ensures that equipment is easy to clean and difficult to corrode due to the devices of the condensing pipe and the cleaning pipe, protects the equipment, greatly reduces the emission of polluted flue gas due to the arrangement of the filter, and protects the environment. When the boiler is used, the first water inlet pipe is opened to enable the main body of the primary heat exchanger to be filled with normal-temperature water, a large amount of high-temperature flue gas generated by reaction in the boiler enters the primary heat exchanger through the first air inlet pipeline, the temperature of the flue gas is about 250 ℃, the flue gas firstly enters the air inlet cavity through the first air inlet pipeline and then enters the spiral pipe, the contact area of the spiral pipe with the normal-temperature water is greatly increased due to the fact that the spiral pipe is spiral in shape, heat is transferred more fully, and the contacted normal-temperature water is changed into high-temperature water with the temperature of about the same for a primary heat; the temperature of the secondary flue gas is 180 ℃, the secondary flue gas enters a first gas outlet pipeline through a gas outlet cavity, a first water pump is turned on at the moment, normal-temperature water in a hot water tank is fed into a first condenser along a first water pipe and then fed into a second condenser through a second water pipe, the secondary flue gas enters a second heat exchanger along with the second water pipe, the secondary flue gas enters a second gas inlet pipeline through the first gas outlet pipeline, the secondary flue gas is indirectly contacted with the first condenser and the second condenser through a flue gas channel to transfer heat, finally, the secondary flue gas is changed into low-temperature flue gas, the low-temperature flue gas passes through a filter, pollutants and then is discharged into the atmosphere, the normal-temperature water in the first condenser and the second condenser is changed into high-temperature water with the temperature of about the normal-temperature water after being indirectly contacted, and then enters the hot water tank along a;
In use, because long-term use leads to producing in the spiral pipe that the smoke and dust is remained, close first valve and second valve this moment, inject into the clean water washing simultaneously in the first scavenge pipe and can, dirty water after the washing can be discharged by the second scavenge pipe. When the secondary heat exchanger is used, a large amount of condensed water can be generated in the condensation pipe main body, and the condensed water can flow into the third water pipe and the fourth water pipe from the first condensation pipe and the second condensation pipe respectively and then flow into the hot water tank.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic of the primary heat exchanger of the present invention.
FIG. 3 is a schematic of the two-stage heat exchanger of the present invention.
Fig. 4 is a schematic view of the structure of the filter of the present invention.
Fig. 5 is a schematic view of the structure of the filter blade of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
a waste heat recycling device comprises a boiler 1 and a primary heat exchanger 2, wherein the primary heat exchanger 2 is positioned on the right side of the boiler 1, the primary heat exchanger 2 comprises a primary heat exchanger main body 25, an air inlet cavity 23 is arranged on one side of the primary heat exchanger main body 25, a first air inlet pipeline 21 is arranged on the air inlet cavity 23, the first air inlet pipeline 21 is positioned outside the primary heat exchanger main body 25, one end, far away from the air inlet cavity 23, of the first air inlet pipeline 21 is fixed on one side of the boiler 1, a first valve 22 is arranged on the first air inlet pipeline 21, a first cleaning pipe 24 is arranged on the air inlet cavity 23, a spiral pipe 26 is arranged inside the primary heat exchanger main body 25, a first water inlet pipe 27 is arranged at the top of the primary heat exchanger main body 25, a first water outlet pipe 28 is arranged at the bottom of the primary heat exchanger main body 25, one end of the first, two ends of the spiral pipe 26 are respectively connected with the air inlet cavity 23 and the air outlet cavity 210, one side of the air outlet cavity 210 is provided with a second cleaning pipe 212, the top of the air outlet cavity 210 is fixedly provided with a first air outlet pipeline 211 through welding, and the first air outlet pipeline 211 is provided with a second valve 213;
The right side of the primary heat exchanger 2 is provided with a secondary heat exchanger 3, the secondary heat exchanger comprises a first condenser 32, a second condenser 33 and a condenser main body 37, two second air inlet pipelines 31 are arranged on the first air outlet pipeline 211, the condenser main body 37 is installed on the end head of the second air inlet pipeline 31, two heat exchange water pipes 36 are arranged inside the condenser main body 37, a flue gas channel 34 is arranged at the distance between the two heat exchange water pipes 36, a second air outlet pipeline 35 is arranged at one end, far away from the second air inlet pipeline 31, of the condenser main body 37, the flue gas channel 34 is respectively connected with the second air inlet pipeline 31 and the second air outlet pipeline 35, a filter 38 is arranged on the second air outlet pipeline 35, the filter 38 is made of synthetic filter material fiber, the filter 38 comprises a filter main body 381, the inner wall of the filter main body 381 is fixedly provided with a rubber sealing ring 382 through adhesion, and a filter, the outside of the filter 383 is provided with an iron ring 384, and the inside of the filter 383 is provided with a filter layer 385;
a water circulation system 4 is arranged at the bottom of the secondary heat exchanger 3, the water circulation system 4 comprises a hot water tank 41, a first water pipe 42 is arranged at the top of the hot water tank 41, a first water pump 43 is arranged on the first water pipe 42, one end of the first water pipe 42, which is far away from the hot water tank 41, is connected with a first condenser 32, a heat exchange water pipe 36 is parallel to the axis of a condenser main body 37, is spaced from each other and is connected in series, the first condenser 32 is parallel to a second condenser 33, a second water pipe 44 is arranged between one sides of the first condenser 32 and the second condenser 33, which are close to a filter 38, a third water pipe 45 is arranged at one side of the first condenser 32 and one side of the second condenser 33, which is far away from the filter 38, a first condenser pipe 48 is arranged at the bottom of the first condenser 32, the first condenser 48 is connected with the third water pipe 45, a fourth water pipe 47 is arranged at one end of the first condenser 32, which is far away from the first, The third water pipe 45 and the fourth water pipe 47 are communicated with each other, and form a closed loop with the first condenser 32, the second condenser 33 and the hot water tank 41, one end of the fourth water pipe 47, which is far away from the first condenser 32, is connected with the hot water tank 41, one side of the hot water tank 41 is provided with a fifth water pipe 49, one side of the hot water tank 41 is provided with a secondary heat utilization unit 410, one end of the fifth water pipe 49, which is far away from the hot water tank 41, is connected with the secondary heat utilization unit 410, one side of the secondary heat utilization unit 410 is provided with a sixth water pipe 411, the sixth water pipe 411 and the fifth water pipe 49 are on the same side, the sixth water pipe 411 is provided with a second water pump 412, and one end of the second water pump 412, which is far away from the secondary heat utilization.
A use method of waste heat recycling equipment specifically comprises the following steps:
the method comprises the following steps: the first water inlet pipe 27 is opened to enable the primary heat exchanger main body 25 to be filled with normal-temperature water, a large amount of high-temperature flue gas generated by reaction in the boiler 1 enters the primary heat exchanger 2 through the first air inlet pipeline 21, the temperature of the flue gas is about 250 ℃, the flue gas firstly enters the air inlet cavity 23 through the first air inlet pipeline 21 and then enters the spiral pipe 26, and the contacted normal-temperature water is changed into high-temperature water with the temperature of about 90 ℃ to be used by the primary heat utilization unit 29;
step two: the temperature of the secondary flue gas is about 180 ℃, the secondary flue gas enters a first air outlet pipeline 211 through an air outlet cavity 210, at the moment, a first water pump 43 is turned on, normal-temperature water in a hot water tank 41 is fed into a first condenser 32 along a first water pipe 42, the secondary flue gas is fed into a second condenser 33 through a second water pipe 44, the secondary flue gas enters a secondary heat exchanger 3 along with the normal-temperature water, the secondary flue gas enters a second air inlet pipeline 31 through the first air outlet pipeline 211, the secondary flue gas indirectly contacts with the first condenser 32 and the second condenser 33 through a flue gas channel 34 to transfer heat, the secondary flue gas is finally changed into low-temperature flue gas, the low-temperature flue gas is discharged into the atmosphere after passing through a filter 38, the normal-temperature water in the first condenser 32 and the second condenser 33 is changed into high-temperature water at about 60 ℃ after being indirectly contacted, and the high-temperature water enters the hot water tank along a;
Step three: in use, smoke residue is generated in the spiral pipe 26 due to long-term use, the first valve 22 and the second valve 213 are closed, clean water is injected into the first cleaning pipe 24 for washing, and dirty water after cleaning can be discharged from the second cleaning pipe 212. When the secondary heat exchanger is used, a large amount of condensed water is generated in the condensation duct main body 37, and the condensed water may flow into the third and fourth water pipes 45 and 47 from the first and second condensation ducts 46 and 48, respectively, and then flow into the hot water tank 41.
The working principle is as follows:
when the boiler is used, the first water inlet pipe 27 is opened to enable the primary heat exchanger body 25 to be filled with normal-temperature water, a large amount of high-temperature flue gas generated by reaction in the boiler 1 enters the primary heat exchanger 2 through the first air inlet pipeline 21, the temperature of the flue gas is about 250 ℃, the flue gas firstly enters the air inlet cavity 23 through the first air inlet pipeline 21 and then enters the spiral pipe 26, the contact area with the normal-temperature water is greatly increased due to the spiral shape of the spiral pipe 26, heat transfer is more sufficient, and the contacted normal-temperature water is changed into high-temperature water of about 90 ℃ to be used by the primary heat utilization unit 29; the temperature of the secondary flue gas is about 180 ℃, the secondary flue gas enters a first air outlet pipeline 211 through an air outlet cavity 210, a first water pump 43 is turned on at the moment, normal-temperature water in a hot water tank 41 is fed into a first condenser 32 along a first water pipe 42 and then fed into a second condenser 33 through a second water pipe 44, the secondary flue gas enters a secondary heat exchanger 3 along with the normal-temperature water, the secondary flue gas enters a second air inlet pipeline 31 through the first air outlet pipeline 211, then indirectly contacts with the first condenser 32 and the second condenser 33 through a flue gas channel 34 to transfer heat, finally becomes low-temperature flue gas, passes through a filter 38, is discharged into the atmosphere after pollutants and impurities are filtered out, the normal-temperature water in the first condenser 32 and the second condenser 33 is changed into high-temperature water with the temperature of 60 ℃ through indirect contact, and then enters the hot water tank along a third water pipe 45 and a fourth water pipe 47, and finally enters a secondary heat utilization unit;
In use, smoke residue is generated in the spiral pipe 26 due to long-term use, the first valve 22 and the second valve 213 are closed, clean water is injected into the first cleaning pipe 24 for washing, and dirty water after cleaning can be discharged from the second cleaning pipe 212. When the secondary heat exchanger is used, a large amount of condensed water is generated in the condensation duct main body 37, and the condensed water may flow into the third and fourth water pipes 45 and 47 from the first and second condensation ducts 46 and 48, respectively, and then flow into the hot water tank 41.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The waste heat recycling device is characterized by comprising a boiler (1) and a primary heat exchanger (2), wherein the primary heat exchanger (2) is positioned on the right side of the boiler (1), the primary heat exchanger (2) comprises a primary heat exchanger main body (25), an air inlet cavity (23) is arranged on one side of the primary heat exchanger main body (25), a first air inlet pipeline (21) is arranged on the air inlet cavity (23), the first air inlet pipeline (21) is positioned outside the primary heat exchanger main body (25), one end, far away from the air inlet cavity (23), of the first air inlet pipeline (21) is fixed on one side of the boiler (1), a first valve (22) is arranged on the first air inlet pipeline (21), a first cleaning pipe (24) is arranged on the air inlet cavity (23), a spiral pipe (26) is arranged inside the primary heat exchanger main body (25), a first water inlet pipe (27) is arranged at the top of the primary heat exchanger main body (25), a first water outlet pipe (28) is arranged at the bottom of the primary heat exchanger main body (25), one end of the first water outlet pipe (28) is connected with a primary heat utilization unit (29), an air outlet cavity (210) is arranged at the top of the primary heat exchanger main body (25), a second cleaning pipe (212) is arranged on one side of the air outlet cavity (210), a first air outlet pipeline (211) is fixed at the top of the air outlet cavity (210) through welding, and a second valve (213) is arranged on the first air outlet pipeline (211);
The right side of one-level heat exchanger (2) is equipped with secondary heat exchanger (3), secondary heat exchanger includes first condenser (32), second condenser (33) and condenser main part (37), be equipped with two second admission lines (31) on first gas outlet pipe way (211), install condenser main part (37) on the end of second admission line (31), the inside of condenser main part (37) is equipped with two heat exchange water pipe (36), the interval of heat exchange water pipe (36) is equipped with flue gas channel (34), the one end that second admission line (31) were kept away from in condenser main part (37) is equipped with second gas outlet pipe way (35), be equipped with filter (38) on second gas outlet pipe way (35), filter (38) include filter main part (381), the inner wall of filter main part (381) is fixed with rubber seal circle (382) through the bonding, a filter disc (383) is fixed in the filter main body (381) through a clamping groove, an iron ring (384) is arranged outside the filter disc (383), and a filter layer (385) is arranged inside the filter disc (383);
the bottom of the secondary heat exchanger (3) is provided with a water circulation system (4), the water circulation system (4) comprises a hot water tank (41), the top of the hot water tank (41) is provided with a first water pipe (42), a first water pump (43) is arranged on the first water pipe (42), one end, far away from the hot water tank (41), of the first water pipe (42) is connected with a first condenser (32), a second water pipe (44) is arranged between one sides, close to the filter (38), of the first condenser (32) and the second condenser (33), one sides, far away from the filter (38), of the first condenser (32) and the second condenser (33) is provided with a third water pipe (45), the bottom of the first condenser (32) is provided with a first condensation pipe (48), the first condensation pipe (48) is connected with the third water pipe (45), one end, far away from the first water pipe (42), of the first condenser (32) is provided with a fourth water pipe (47), one end, far away from first condenser (32), of fourth water pipe (47) links to each other with hot-water tank (41), one side of hot-water tank (41) is equipped with fifth water pipe (49), hot-water tank (41) one side is equipped with second grade heat utilization unit (410), the one end that hot-water tank (41) were kept away from to fifth water pipe (49) links to each other with second grade heat utilization unit (410), one side of second grade heat utilization unit (410) is equipped with sixth water pipe (411), and sixth water pipe (411) and fifth water pipe (49) are in the same side, be equipped with second water pump (412) on sixth water pipe (411), the one end that second grade heat utilization unit (410) were kept away from to second water pump (412) links to each other with hot-water tank (41).
2. The waste heat recycling device according to claim 1, wherein both ends of the spiral pipe (26) are connected with the air inlet cavity (23) and the air outlet cavity (210) respectively.
3. A waste heat recovery device according to claim 1, wherein the heat exchange water pipe (36) is axially parallel to the condenser body (37), spaced from and serially connected to each other, and the first condensation duct (32) and the second condensation duct (33) are parallel to each other.
4. A waste heat recovery device according to claim 1, characterized in that the flue gas channel (34) is connected to a second inlet duct (31) and a second outlet duct (35), respectively.
5. The waste heat recycling device according to claim 1, wherein the filter (38) is made of synthetic fiber filter material.
6. A waste heat recovery device according to claim 1, characterized in that the first water pipe (42), the second water pipe (44), the third water pipe (45) and the fourth water pipe (47) are all in communication and form a closed loop with the first condenser (32), the second condenser (33) and the hot water tank (41).
7. The use method of the waste heat recovery and utilization equipment according to claim 1, characterized by comprising the following steps:
The method comprises the following steps: opening a first water inlet pipe (27) to enable a primary heat exchanger main body (25) to be filled with normal-temperature water, enabling a large amount of high-temperature flue gas generated by reaction in a boiler (1) to enter a primary heat exchanger (2) through a first air inlet pipeline (21), enabling the temperature of the flue gas to be 250 ℃, enabling the flue gas to firstly enter an air inlet cavity (23) through the first air inlet pipeline (21) and then enter a spiral pipe (26), and enabling the contacted normal-temperature water to be heated to 90 ℃ to be used by a primary heat utilization unit (29);
step two: the temperature of the secondary flue gas is 180 ℃, the secondary flue gas enters a first air outlet pipeline (211) through an air outlet cavity (210), at the moment, a first water pump (43) is started, normal-temperature water in a hot water tank (41) is sent into a first condenser (32) along a first water pipe (42), then sent into a second condenser (33) through a second water pipe (44), the secondary flue gas enters a secondary heat exchanger (3) along with the secondary flue gas, the secondary flue gas enters a second air inlet pipeline (31) through the first air outlet pipeline (211), then indirectly contacts with the first condenser (32) and the second condenser (33) through a flue gas channel (34) to transfer heat, finally changed into low-temperature flue gas which is discharged into the atmosphere after passing through a filter (38), the normal-temperature water in the first condenser (32) and the second condenser (33) is changed into high-temperature water of 60 ℃ after indirect contact, and then enters the hot water tank along a third water pipe (45) and a fourth water, finally, the waste heat enters a secondary heat utilization unit (410) through a fifth water pipe (49) for use;
Step three: the first valve (22) and the second valve (213) are closed, clean water is injected into the first cleaning pipe (24) for washing, dirty water after cleaning is discharged from the second cleaning pipe (212), when the secondary heat exchanger is used, a large amount of condensed water can be generated in the condensation pipe main body (37), and the condensed water flows into the third water pipe (45) and the fourth water pipe (47) from the first condensation pipe (46) and the second condensation pipe (48) respectively and then flows into the hot water tank (41).
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| CN202010636631.8A CN111853844A (en) | 2020-07-03 | 2020-07-03 | Waste heat recycling device and using method |
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