CN112344764B - Self-cleaning and scale-inhibiting sewage heat exchanger - Google Patents
Self-cleaning and scale-inhibiting sewage heat exchanger Download PDFInfo
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- CN112344764B CN112344764B CN202011180199.2A CN202011180199A CN112344764B CN 112344764 B CN112344764 B CN 112344764B CN 202011180199 A CN202011180199 A CN 202011180199A CN 112344764 B CN112344764 B CN 112344764B
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- 239000010865 sewage Substances 0.000 title claims abstract description 97
- 238000004140 cleaning Methods 0.000 title claims abstract description 27
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 241000270295 Serpentes Species 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 230000005764 inhibitory process Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 230000007774 longterm Effects 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 description 3
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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
- F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
- F28D3/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits
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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
- F28D11/00—Heat-exchange apparatus employing moving conduits
- F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
- F28D11/04—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller performed by a tube or a bundle of tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/06—Spray nozzles or spray pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F5/00—Elements specially adapted for movement
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a self-cleaning and scale-inhibiting sewage heat exchanger, which comprises a sewage lifting pump, an upper water supply tank sewage inlet, an upper water supply tank sewage outlet, an upper water supply tank bottom water distributor connecting pipe, a water distributor, a single-blade double-curved-surface heat exchange module, a rotary barrel shaft, an internal limiting gear, a transmission gear, a power output control box, a water receiving tank sewage outlet, a sewage discharge pump and a barrel shaft bracket baffle, wherein the upper water supply tank is fixed on the barrel shaft bracket baffle in a bolt connection or welding mode; the single-sheet hyperboloid heat exchange module is arranged below the water distributor and specifically comprises an inclined cloth heat exchange coil tube array, a rotary wheel type coil frame, a heat exchange medium inlet and a heat exchange medium outlet. The heat exchanger has the advantages of compact structure, low metal consumption, wide sewage application range, no need of being matched with descaling equipment for use, difficult scaling after long-term operation and capability of keeping higher heat exchange efficiency.
Description
Technical Field
The invention relates to the technical field of heat exchange equipment, in particular to a self-cleaning and scale-inhibiting sewage heat exchanger.
Background
A lot of heat in industrial production and urban life in China is stored in industrial sewage and domestic sewage and discharged, the annual discharge amount of the industrial sewage is about 400 hundred million tons, 20-30% of the industrial sewage is medium-high temperature sewage, the discharge temperature is respectively higher than 50 ℃ and 80 ℃, the heat in low-temperature sewage discharged by cities also accounts for about 15% of the total heat discharge amount of the cities, and the energy is recycled and utilized, for example, a sewage source heat pump system is adopted to extract the heat to recycle low-level energy, so that the energy-saving and environment-friendly significance is achieved when the energy is used for cooling and heating in the cities. The technical difficulty of heat exchange of the sewage source heat pump system is that complicated sewage environments, such as pH values and hardness of different sewages, and suspended matters and adhesive matters contained in the sewage, can cause the problems of generation of sediments or attachments on the surface of the sewage heat exchanger, scaling, blockage and the like after operation for a period of time, can reduce the heat exchange efficiency of equipment, increase the flow resistance, and finally cause the problems of reduction of the heat recovery efficiency of the sewage source heat pump system, increase of the energy consumption of the system and the like.
The sewage heat exchanger applied in the current engineering mainly has the forms of immersion, plate type, shell-and-tube type, wide flow passage type, spray type and the like, particularly:
the immersion type heat exchanger and the wide runner type heat exchanger have larger volume and lower heat exchange efficiency, and need to be matched with descaling equipment for use, so that the use cost is further increased; the heat exchange efficiency of the plate heat exchanger and the shell-and-tube heat exchanger can be rapidly reduced along with the generation of dirt in a narrow flow passage in the heat exchanger, even the heat exchanger is blocked, the difficulty in the cleaning process is high, the maintenance period is short, and the plate heat exchanger and the shell-and-tube heat exchanger are not suitable for sewage with poor quality such as large suspended matter particles; traditional fountain heat exchanger occupies and obtains considerable heat exchange efficiency for reducing to the space often need to adopt total heat transfer area big, the heat transfer surface that distributes compactly realizes, will certainly can increase equipment cost, the complexity of processing the degree of difficulty and heat transfer core structure, and although fountain heat exchanger can shorten the dirt and generate induced phase and make the scale deposit rate far below above-mentioned several kinds of indirect heating equipment in short-term use, but longer cycle, comparatively regular operation back, the fluid still can lead to the dirt to form at the regular flow on heat transfer surface, it is very big to clean the degree of difficulty to complicated heat transfer structure this moment.
Disclosure of Invention
The invention aims to provide a self-cleaning and scale-inhibiting sewage heat exchanger which has a compact structure, small required longitudinal arrangement space, low metal consumption and wide sewage application range, does not need to be matched with scale removal equipment for use, is not easy to scale after long-term operation and can keep higher heat exchange efficiency.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a sewage heat exchanger of automatically cleaning and dirt that presses down, includes the sewage elevator pump, goes up the feed tank, goes up feed tank sewage import, goes up the feed tank drain, goes up feed tank bottom water distributor and takes over, the water distributor, single leaf hyperboloid heat transfer module, rotatory bucket axle, inside limit gear, drive gear, power take off control box, water receiving tank drain, water receiving tank outlet of sewer, sewage discharge pump, bucket axle support baffle, wherein:
the upper water supply tank is fixed on the barrel shaft bracket baffle plate in a bolt connection or welding mode, and a sewage inlet of the upper water supply tank is arranged in the middle of the side surface of the upper water supply tank; the sewage draining outlet of the upper water supply tank is arranged at the bottom of the side surface of the upper water supply tank; the water distributor connecting pipe at the bottom of the upper water supply tank is uniformly distributed at the bottom of the upper water supply tank and is connected with the water distributor;
place in the below of water-locator single-leaf hyperboloid heat transfer module, single-leaf hyperboloid heat transfer module specifically includes cloth heat transfer coil pipe to one side is listed as, runner formula coil pipe frame, heat transfer medium entry, heat transfer medium export, wherein:
the rotary wheel type coil pipe frames positioned at two sides of the single-sheet double-curved-surface heat exchange module are respectively connected with two rotary barrel shafts through two internal limiting gears; the rotary barrel shaft is arranged on barrel shaft bracket baffles on two sides of the heat exchanger; a transmission gear is fixedly arranged on the rotary barrel shaft on the left side of the barrel shaft bracket baffle and is meshed with a power gear arranged in a power output control box;
the single-sheet double-curved-surface heat exchange module is installed in a mode that a rotating shaft of the single-sheet double-curved-surface heat exchange module is horizontal to the ground, an internal inclined-distributed heat exchange coil pipe array is formed by installing a plurality of heat exchange single pipes in an inclined mode, the heat exchange single-sheet double-curved-surface heat exchange module is in multi-layer single-sheet double-curved-surface structural arrangement, and all layers of adjacent single pipes are connected into a whole with through inner parts through snakes;
the two ends of the pipe array of the obliquely-distributed heat exchange coil are fixed on the rotary wheel type coil frame, the rotary wheel type coil frame is disc-shaped, and a preformed hole for a heat exchange medium inlet and a preformed hole for a heat exchange medium outlet are respectively reserved at the centers of the two circles;
the heat exchange medium inlet and the heat exchange medium outlet extend out of the rotary wheel type coil pipe frames on two sides through the preformed holes and are respectively connected with an external heat exchange medium pipeline, the joint is positioned in the hollow cavity of the two rotary barrel shafts, and the joint is in rotatable sealing connection.
According to the technical scheme provided by the invention, the heat exchanger has a compact structure, a longitudinal arrangement space required between the water distributor and the heat exchange module is smaller, the metal consumption is small, the sewage application range is wide, the heat exchanger does not need to be matched with descaling equipment for use, scaling is not easy to generate after long-term operation, and higher heat exchange efficiency can be maintained.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of an overall structure of a self-cleaning and scale-inhibiting waste water heat exchanger according to an embodiment of the present invention;
FIG. 2 is a front view of a single-sheet hyperboloid heat exchange module and a water distributor according to an embodiment of the present invention;
FIG. 3 is a side view of a single-sheet hyperboloid heat exchange module and a water distributor according to an embodiment of the present invention;
fig. 4 is a top view of a single-sheet double-curved-surface heat exchange module and a water distributor according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings, and as shown in fig. 1, is a schematic diagram of an overall structure of a self-cleaning and scale-inhibiting sewage heat exchanger provided by the embodiments of the present invention, and includes a sewage lift pump 1, an upper water supply tank 2, an upper water supply tank sewage inlet 2a, an upper water supply tank sewage outlet 2b, an upper water supply tank bottom water distributor connection pipe 2c, a water distributor 3, a single-blade hyperboloid heat exchange module 4, rotary barrel shafts 5a, 5b, an internal limit gear 8, a transmission gear 9, a power gear 10, a power output control box 11, a water receiving tank 6, a water receiving tank sewage outlet 6a, a water receiving tank sewage outlet 6b, a sewage discharge pump 7, and a barrel shaft support baffle 12, wherein the connections and working relations of the parts are as follows:
the upper water supply tank 2 is fixed on the barrel shaft bracket baffle 12 in a bolt connection or welding mode, and a sewage inlet 2a of the upper water supply tank is arranged in the middle of the side surface of the upper water supply tank 2; the upper water supply tank sewage outlet 2b is arranged at the bottom of the side surface of the upper water supply tank 2; the water distributor connecting pipes 2c at the bottom of the upper water supply tank are uniformly distributed at the bottom of the upper water supply tank 2 and are connected with the water distributor 3;
the single-sheet hyperboloid heat exchange module 4 is placed below the water distributor 3, as shown in fig. 2, a front view of the single-sheet hyperboloid heat exchange module and the water distributor according to the embodiment of the present invention is shown, as shown in fig. 3, a side view of the single-sheet hyperboloid heat exchange module and the water distributor is shown, as shown in fig. 4, a top view of the single-sheet hyperboloid heat exchange module and the water distributor is shown, with reference to fig. 2 to 4: the single-sheet double-curved-surface heat exchange module 4 specifically comprises an inclined-cloth heat exchange coil tube array 14, a rotary wheel type coil frame 13, 15, a heat exchange medium inlet 16 and a heat exchange medium outlet 17, wherein:
the rotary wheel type coil pipe frames 13 and 15 positioned at two sides of the single-sheet hyperboloid heat exchange module 4 are respectively connected with two rotary barrel shafts 5a and 5b through two internal limiting gears 8; the rotary barrel shafts 5a and 5b are arranged on barrel shaft bracket baffles 12 at two sides of the heat exchanger; a transmission gear 9 is fixedly arranged on the rotary barrel shaft 5a on the left side of the barrel shaft bracket baffle 12, and the transmission gear 9 is meshed with a power gear 10 arranged in a power output control box 11;
the single-sheet double-curved-surface heat exchange module 4 is installed in a mode that a rotating shaft of the single-sheet double-curved-surface heat exchange module is horizontal to the ground, an internal inclined-distributed heat exchange coil tube array 14 is formed by installing a plurality of heat exchange single tubes in an inclined mode, the heat exchange single-sheet double-curved-surface heat exchange module is in multi-layer single-sheet double-curved-surface structural arrangement, and each layer of adjacent single tubes are connected into a whole with through inside through snake-shaped connection;
two ends of the obliquely-distributed heat exchange coil tube array 14 are fixed on the rotary wheel type coil tube frames 13 and 15, the rotary wheel type coil tube frames 13 and 15 are disc-shaped, and two circle centers are respectively provided with a preformed hole for a heat exchange medium inlet 16 and a preformed hole for a heat exchange medium outlet 17;
the heat exchange medium inlet 16 and the heat exchange medium outlet 17 extend out of the rotary wheel type coil pipe frames 13 and 15 at two sides through the preformed holes and are respectively connected with an external heat exchange medium pipeline, the connection part is positioned in the hollow cavity of the two rotary barrel shafts 5a and 5b, and the connection part is in rotatable sealing connection.
In the specific implementation, as shown in fig. 2, the tube arrays 14 of the obliquely-distributed heat exchange coil have a plurality of heat exchange single tubes arranged according to a single-sheet hyperboloid from inside to outside in multiple layers, that is, a plurality of single-sheet hyperboloid tube rows nested from small to large in sequence, and satisfy the following equation:
wherein a and c are positive constants, and influence the specific shape proportion of the single-sheet hyperboloid; the direction of a central rotating shaft of the single-sheet hyperboloid tube row is the direction of a z-axis; the plane in the middle of the rotating shaft and perpendicular to the rotating shaft is a plane formed by an x axis and a y axis; the middle part of the rotating shaft of the single-sheet hyperboloid, namely the thinnest part of the single-sheet hyperboloid, is intersected with the xy plane to form a circumference with the diameter of 2 a;
namely, the double-curved-surface heat exchange tube is symmetrical along a central rotating shaft, the value of a of each layer of double curved surfaces is gradually increased from inside to outside, and the distance between the single-leaf double curved surfaces is controlled to be 1-2 times of the tube diameter of the heat exchange tube;
each heat exchange single tube on each layer of the single-sheet hyperboloid is installed in a mode of forming a certain angle with a rotating shaft of the single-sheet hyperboloid heat exchange module 4, namely, the heat exchange single tubes are installed in a repeated equidirectional inclined surrounding mode, so that the heat exchange surface formed by the heat exchange single tubes is a single-sheet hyperboloid;
each heat exchange single tube is different straight buses on the single-sheet hyperboloid, and is contactless each other, and the non-intersecting, the interval distance of each heat exchange single tube on same single-sheet hyperboloid is 1 ~ 2 times heat exchange tube pipe diameters.
Referring to fig. 2 and 3, the water distributor 3 is specifically arranged in the following manner:
the water distributors 3 are arranged in parallel along the vertical projection of a straight bus at the top end of the single-sheet hyperboloid tube row at the outermost layer of the single-sheet hyperboloid heat exchange module 4, namely the vertical projection of two heat exchange single tubes at the top of the outermost layer of the inclined heat exchange coil tube array 14 is taken as a front boundary and a rear boundary, and the left end and the right end are flush with the inner sides of the rotary wheel type coil tube frames 13 and 15, and finally the water distributors are embodied as parallelogram water distributors containing a diagonal line parallel to the rotary shaft;
the sewage dripping ports of the water distributor 3 are distributed in a plurality of straight lines, and the positions of the sewage dripping ports respectively correspond to the heat exchange single tubes in the lower projection range of the water distributor 3;
the installation height of the water distributor 3 is controlled at a lower position where the left side and the right side of the water distributor are not just in contact with the highest point of the single-sheet hyperboloid heat exchange module 4 and the normal rotation of the single-sheet hyperboloid heat exchange module 4 is not affected.
In a specific implementation, the water distributor 3 is in a form of, but not limited to, a sawtooth overflow trough water distributor, and the shape and the installation position of the sawtooth overflow trough water distributor are adjusted according to a specific installation space; and the multiple rows of sewage dripping openings of the water distributor 3 are always linearly arranged along the heat exchange single pipe, and a certain distance is reserved between the sewage dripping openings and the heat exchange single pipe, so that liquid drops or liquid columns obtain a certain initial speed.
In the operation process of the sewage heat exchanger, after the single-blade hyperboloid heat exchange module 4 rotates clockwise or anticlockwise for a certain angle value, the sewage dripping port of the water distributor 3 is still positioned right above the top heat exchange single pipe; the specific rotation period and rotation angle of the single-blade hyperboloid heat exchange module 4 are determined according to the self-cleaning and scale-inhibiting requirements of specific sewage environments and the specification of the pipe array 14 of the obliquely-distributed heat exchange coil, such as the number and the spacing of the heat exchange pipes.
In addition, each heat exchange single tube in the inclined cloth heat exchange coil tube array 14 adopts a circular copper straight tube, an oval copper tube, a circular corrugated copper tube, a circular spiral corrugated copper tube, a circular stainless steel tube, an oval stainless steel tube, a circular corrugated stainless steel tube or a circular spiral corrugated stainless steel tube.
Based on the structure of the sewage water exchanger, after the sewage heat exchanger continuously operates for a period of time, the sewage water exchanger is driven to rotate clockwise or anticlockwise by a power gear 10 and a transmission gear 9 through a power output control box 11 which is manually controlled or automatically operated by taking the connecting line of two rotating barrel shafts 5a and 5b on rotating wheel type coil pipe frames 13 and 15 as a shaft;
after rotating, the relative positions of the heat exchange single tubes arranged according to the multi-layer single-leaf double-curved-surface structure in the inclined heat exchange coil tube array 14 and the fixed water distributor 3 are changed, namely the contact sequence, the contact angle and the flow path of the formed liquid film of the liquid drop or liquid column of the original water distributor 3 and the heat exchange single tubes in the inclined heat exchange coil tube array 14 are changed by regular rotation, so that the forming state and the flow state of the liquid film are continuously changed, and finally the disturbance effect of the flowing liquid film on the surface of the heat exchange coil is strengthened, and the self-cleaning and scale inhibiting effects are achieved;
after dirt on the surface of the pipe array 14 of the obliquely-distributed heat exchange coil falls off, the dirt and sewage fall into the water receiving tank 6 together, and in the intermittent operation period, the upper water supply tank 2 drains water, overhauls and cleans through the sewage outlet 2b of the upper water supply tank; the water receiving tank 6 discharges water through a water receiving tank drain outlet 6a, and is overhauled and cleaned;
wherein, the upper water supply tank sewage draining port 2b and the water receiving tank sewage draining port 6a are both arranged at a gradient of 3 percent.
In addition, in the concrete implementation, the power transmission of the transmission gear 9 and the power gear 10 which are sequentially connected with the power output control box 11 is realized through the direct gear engagement or the form of a conveyor belt or a chain.
The following is a detailed description of the specific operation process of the sewage heat exchanger provided by the embodiment of the present invention:
sewage is lifted to a high place by the sewage lifting pump 1 through a pipeline, enters the upper water supply tank 2 from a sewage inlet 2a of the upper water supply tank, flows into the water distributor 3 through a water distributor connecting pipe 2c at the bottom of the upper water supply tank, leaves the water distributor 3 in a liquid drop or liquid column shape under the action of gravity, vertically and uniformly drops on the upper surface of a heat exchange pipe at the top end of an inclined cloth heat exchange coil pipe array 14 of the single-blade hyperboloid heat exchange module 4 at a certain speed through free falling acceleration, forms a continuously flowing liquid film on each corresponding heat exchange single pipe wall surface in the liquid distribution range of the water distributor 3, flows vertically and downwards along the outer wall of the heat exchange pipe under the action of gravity, sequentially flows through a plurality of heat exchange single pipes in the inclined cloth heat exchange coil pipe array 14 which are distributed according to a multi-layer single-blade hyperboloid structure and are connected according to a snake shape, the flow speed is continuously improved, and finally drops and collects in the water receiving tank 6, sewage flows into a downstream pipeline through a sewage outlet 6b of the water receiving tank and is discharged through a sewage discharge pump 7;
the heat exchange medium flows into the obliquely distributed heat exchange coil tube array 14 from the heat exchange medium inlet 16, sequentially flows back and forth in single tubes connected in a snake shape in the heat exchange medium, and exchanges heat with the flowing sewage liquid film through the tube walls of the heat exchange tubes, the heat exchange medium sequentially flows through the single-leaf hyperboloid formed by all the heat exchange tubes inwards from the single-leaf hyperboloid formed by the outermost heat exchange tubes after entering the obliquely distributed heat exchange coil tube array 14, finally flows out from the heat exchange medium outlet 17, enters a downstream pipeline and can be connected with equipment such as a heat pump unit and the like;
after the sewage heat exchanger continuously operates for a period of time, the connecting line of two rotating barrel shafts 5a and 5b on the rotating wheel type coil pipe frames 13 and 15 is used as a shaft, and the sewage heat exchanger can be finally driven to rotate in a clockwise or anticlockwise direction through a power gear 10 and a transmission gear 9 by a power output control box 11 which is manually controlled or automatically operated; after rotating, the relative positions of the heat exchange straight pipes arranged according to the multi-layer single-blade hyperboloid structure in the inclined cloth heat exchange coil pipe array 14 and the fixed water distributor 3 are changed, namely, the contact sequence, the contact angle and the flow path of the formed liquid film of the original liquid drops or liquid columns of the water distributor 3 and the heat exchange single pipes in the inclined cloth heat exchange coil pipe array 14 are changed by regular rotation, so that the forming state and the flow state of the liquid film are continuously changed, and finally the disturbance effect of the flowing liquid film on the surface of the heat exchange coil is strengthened, and the self-cleaning and scale inhibiting effects are achieved.
The liquid film on the surface of the heat exchange single tube wets the wall of the heat exchange tube at a certain angle (non-vertically downwards) under the dual action of gravity and tube inclination angle in the rotation process of the heat exchange module, liquid drops cannot be accumulated at the bottom of the tube for a long time due to the fact that the heat exchange tube is installed out of level, new liquid drops drop on the surface of the heat exchange tube from different positions before after rotating for a certain angle, the inclination of the heat exchange tube is changed at the moment, the angle of the liquid drop wetting tube wall is changed compared with the previous stage, due to the structural characteristic of a single-leaf hyperboloid, the liquid film can not form an obvious rule in the flowing on the surface of the heat exchange tube in long-term use, and the rotation can cause obvious disturbance to the process, so that good self-cleaning and scale inhibition effects are achieved.
After dirt on the surface of the tube array 14 of the obliquely-distributed heat exchange coil falls off, the dirt and sewage fall into the water receiving tank 6 together; in the intermittent operation period, the water supply tank 2 drains water, overhauls and cleans through the upper water supply tank drain outlet 2 b; the water receiving tank 6 drains water, overhauls and cleans the sewage through a drain outlet 6a of the water receiving tank.
In the specific treatment process, aiming at the sewage containing more slender pollutants, such as the sewage containing hair, the sewage heat exchanger disclosed by the application is continuously operated for about 3 days, the connecting line of the two rotating barrel shafts 5a and 5b on the rotary wheel type coil pipe frames 13 and 15 is taken as an axis, and the sewage heat exchanger can be finally driven to rotate 80-100 degrees in the clockwise or anticlockwise direction through the power gear 10 and the transmission gear 9 by a power output control box 11 which is manually controlled or automatically operated.
For sewage with more dirt on a large scale and lower water quality, such as primary sewage, the sewage heat exchanger disclosed by the application takes the connection line of the two rotary barrel shafts 5a and 5b on the rotary wheel type coil pipe frames 13 and 15 as the shaft every 1 day of continuous operation, and can finally be driven to rotate by 170 degrees to 190 degrees in the clockwise direction or the anticlockwise direction through the power gear 10 and the transmission gear 9 by the power output control box 11 which is manually controlled or automatically operated.
It is noted that those skilled in the art will recognize that embodiments of the present invention are not described in detail herein.
In summary, the self-cleaning and scale-inhibiting sewage heat exchanger provided by the embodiment of the invention has the following advantages:
compared with an immersion type heat exchanger, the volume control is more reasonable, the heat exchange efficiency is higher, and the use of scale removal equipment is not needed; compared with a plate heat exchanger and a shell-and-tube heat exchanger, the heat exchanger is less prone to scaling, suitable for long-time operation, wide in adaptability to sewage with different water qualities and free of influence on operation due to blocking; compared with the existing spray-type heat exchanger with the self-cleaning function, the multi-layer single-blade hyperboloid surface with larger contact area with the sewage liquid drop is formed by the inclined arrangement of the heat exchange straight pipes, the using amount of the heat exchange pipes is less under the condition of the same space coverage rate, the required complex curved surface can be obtained by the structural characteristics of the single-blade hyperboloid straight bus through the straight pipe processing arrangement, the metal consumption is saved, and the processing difficulty is reduced; because the structural characteristic of the single-blade hyperboloid can reduce the distance between the water distributor and the heat exchange module, and meanwhile, enough liquid falling space is reserved, so that liquid drops obtain certain initial speed through the free falling process in the space, the occupation of longitudinal space is saved, and a compact external structure is obtained.
The self-cleaning function of the sewage heat exchanger is realized by rotation, and a liquid film on the surface of the heat exchange tube shows periodic reciprocating inclined flow change in the rotation process, so that the sewage heat exchanger is more complex and irregular in regular radial vertical flow compared with the prior self-cleaning technology, and is more favorable for inhibiting and washing dirt; the functions of scale inhibition and self-cleaning can be realized by manual control or automatic control, and the sewage heat exchange surface dirt except for the removal of the regular external washing or mechanical scraping and the chemical agent is not needed, so that the device is more suitable for long-term operation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a sewage heat exchanger of automatically cleaning and dirt that presses down, a serial communication port, including the sewage elevator pump, go up the feed tank, go up feed tank sewage import, go up the feed tank drain, go up feed tank bottom water distributor and take over, the water distributor, single leaf hyperboloid heat transfer module, rotatory bucket axle, inside limit gear, drive gear, power take off control box, water receiving tank drain, water receiving tank sewage export, sewage discharge pump, bucket axle support baffle, wherein:
the upper water supply tank is fixed on the barrel shaft bracket baffle plate in a bolt connection or welding mode, and a sewage inlet of the upper water supply tank is arranged in the middle of the side surface of the upper water supply tank; the sewage draining outlet of the upper water supply tank is arranged at the bottom of the side surface of the upper water supply tank; the water distributor connecting pipe at the bottom of the upper water supply tank is uniformly distributed at the bottom of the upper water supply tank and is connected with the water distributor;
place in the below of water-locator single-leaf hyperboloid heat transfer module, single-leaf hyperboloid heat transfer module specifically includes cloth heat transfer coil pipe to one side is listed as, runner formula coil pipe frame, heat transfer medium entry, heat transfer medium export, wherein:
the rotary wheel type coil pipe frames positioned at two sides of the single-sheet double-curved-surface heat exchange module are respectively connected with two rotary barrel shafts through two internal limiting gears; the rotary barrel shaft is arranged on barrel shaft bracket baffles on two sides of the heat exchanger; a transmission gear is fixedly arranged on the rotary barrel shaft on the left side of the barrel shaft bracket baffle and is meshed with a power gear arranged in a power output control box;
the single-sheet double-curved-surface heat exchange module is installed in a mode that a rotating shaft of the single-sheet double-curved-surface heat exchange module is horizontal to the ground, an internal inclined-distributed heat exchange coil pipe array is formed by installing a plurality of heat exchange single pipes in an inclined mode, the heat exchange single-sheet double-curved-surface heat exchange module is in multi-layer single-sheet double-curved-surface structural arrangement, and all layers of adjacent single pipes are connected into a whole with through inner parts through snakes;
the two ends of the pipe array of the obliquely-distributed heat exchange coil are fixed on the rotary wheel type coil frame, the rotary wheel type coil frame is disc-shaped, and a preformed hole for a heat exchange medium inlet and a preformed hole for a heat exchange medium outlet are respectively reserved at the centers of the two circles;
the inclined-cloth heat exchange coil tube array comprises a plurality of heat exchange single tubes which are arranged from inside to outside according to a plurality of layers of single-sheet hyperboloids, namely a plurality of single-sheet hyperboloid tube rows which are nested from small to large in sequence, and the equation is as follows:
wherein a and c are positive constants, and influence the specific shape proportion of the single-sheet hyperboloid; the direction of a central rotating shaft of the single-sheet hyperboloid tube row is the direction of a z-axis; the plane in the middle of the rotating shaft and perpendicular to the rotating shaft is a plane formed by an x axis and a y axis; the middle part of the rotating shaft of the single-sheet hyperboloid, namely the thinnest part of the single-sheet hyperboloid, is intersected with the xy plane to form a circumference with the diameter of 2 a;
the heat exchange tube is symmetrical along a central rotating shaft, the value of a of each layer of double curved surfaces is gradually increased from inside to outside, and the distance between the single-leaf double curved surfaces is controlled to be 1-2 times of the tube diameter of the heat exchange tube;
each heat exchange single tube on each layer of the single-sheet hyperboloid is installed in a mode of forming a certain angle with a rotating shaft of the single-sheet hyperboloid heat exchange module, namely, the heat exchange single tubes are installed in a repeated equidirectional inclined surrounding mode, so that the heat exchange surface formed by the heat exchange single tubes is a single-sheet hyperboloid;
each heat exchange single tube is a different straight bus on the single-blade hyperboloid, the heat exchange single tubes are not in contact with each other and are not crossed, and the spacing distance between the heat exchange single tubes on the same single-blade hyperboloid is 1-2 times of the diameter of the heat exchange tube;
the heat exchange medium inlet and the heat exchange medium outlet extend out of the rotary wheel type coil pipe frames on two sides through the preformed holes and are respectively connected with an external heat exchange medium pipeline, the joint is positioned in the hollow cavity of the two rotary barrel shafts, and the joint is in rotatable sealing connection.
2. The self-cleaning and scale-inhibiting wastewater heat exchanger of claim 1, wherein the water distributor is arranged in a manner that:
the water distributors are arranged in parallel along the vertical projection of a straight bus at the top end of the single-sheet hyperboloid tube row at the outermost layer of the single-sheet hyperboloid heat exchange module, namely the water distributors take the vertical projection of two heat exchange single tubes at the top of the outermost layer of the inclined heat exchange coil tube array as front and back boundaries, and the left and right ends of the water distributors are flush with the inner side of the rotary wheel type coil tube frame, and finally the water distributors are embodied as parallelogram water distributors containing a diagonal line parallel to a rotating shaft;
the sewage dripping ports of the water distributor are distributed in a plurality of straight lines, and the positions of the sewage dripping ports respectively correspond to the heat exchange single tubes in the projection range of the lower part of the water distributor;
the installation height of the water distributor is controlled at the position where the left side and the right side of the water distributor are not in contact with the highest point of the single-blade hyperboloid heat exchange module right and normal rotation of the single-blade hyperboloid heat exchange module is not influenced right.
3. The self-cleaning and scale inhibiting effluent heat exchanger of claim 1,
after the sewage heat exchanger continuously operates for a period of time, a connecting line of two rotating barrel shafts on the rotating wheel type coil pipe frame is taken as a shaft, and the rotating wheel type coil pipe frame is driven to rotate clockwise or anticlockwise through a power gear and a transmission gear by a power output control box which is manually controlled or automatically operated;
after the inclined cloth heat exchange coil pipe array is rotated, the relative positions of each heat exchange single pipe arranged according to a multi-layer single-leaf double-curved-surface structure in the inclined cloth heat exchange coil pipe array and the fixed water distributor are changed, namely the contact sequence, the contact angle and the flow path of the formed liquid film of the original liquid distributor and each heat exchange single pipe in the inclined cloth heat exchange coil pipe array are changed by regular rotation, so that the forming state and the flow state of the liquid film are continuously changed, and finally the disturbance effect of the flowing liquid film on the surface of the heat exchange coil pipe is strengthened, and the self-cleaning and scale inhibiting effects are achieved;
after dirt on the surface of the tube array of the obliquely-distributed heat exchange coil falls off, the dirt and sewage fall into the water receiving tank together, and in the intermittent operation period, the upper water supply tank drains water, overhauls and cleans the dirt through a drain outlet of the upper water supply tank; the water receiving tank discharges water, overhauls and cleans dirt through a drain outlet of the water receiving tank;
wherein, the drain of the upper water supply tank and the drain of the water receiving tank are both arranged at a gradient of 3 percent.
4. The self-cleaning and scale inhibiting effluent heat exchanger of claim 1,
the power transmission of the transmission gear and the power gear which are sequentially connected with the power output control box is realized through the direct meshing of the gears or the form of a conveyor belt or a chain.
5. The self-cleaning and scale inhibiting effluent heat exchanger of claim 1,
the water distributor is in a sawtooth overflow trough water distributor form, and the shape and the installation position of the water distributor are adjusted according to the specific installation space;
and a plurality of rows of sewage dripping openings of the water distributor are linearly arranged along the heat exchange single pipe all the time, and a certain initial speed interval is reserved between the sewage dripping openings and the heat exchange single pipe to ensure that liquid drops or liquid columns obtain a certain initial speed.
6. The self-cleaning and scale inhibiting effluent heat exchanger of claim 1,
in the operation process of the sewage heat exchanger, after the single-blade hyperboloid heat exchange module rotates clockwise or anticlockwise for a certain angle value, the sewage dripping port of the water distributor is still positioned right above the top heat exchange single pipe;
the specific rotation period and the specific rotation angle of the single-sheet double-curved-surface heat exchange module are determined according to the self-cleaning scale inhibition requirement of a specific sewage environment and the specification of the pipe array of the obliquely-distributed heat exchange coil.
7. The self-cleaning and scale inhibiting effluent heat exchanger of claim 1,
and each heat exchange single tube in the inclined cloth heat exchange coil tube array adopts a circular copper straight tube, an oval copper tube, a circular corrugated copper tube, a circular spiral corrugated copper tube, a circular stainless steel tube, an oval stainless steel tube, a circular corrugated stainless steel tube or a circular spiral corrugated stainless steel tube.
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| CN202011180199.2A CN112344764B (en) | 2020-10-29 | 2020-10-29 | Self-cleaning and scale-inhibiting sewage heat exchanger |
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| CN113776354B (en) * | 2021-08-16 | 2024-01-26 | 江苏格安德环保工程科技有限公司 | Heat exchanger with internally adjustable centrifugal soaking device |
| CN114974625B (en) * | 2022-05-18 | 2024-05-28 | 中国工程物理研究院核物理与化学研究所 | Heat pipe reactor with heat pipes arranged in co-hyperboloid mode |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7369874A (en) * | 1973-10-23 | 1976-04-01 | Baltimore Airton Company, Inc | Water distribution system for heat exchangers |
| DD228041A1 (en) * | 1984-10-25 | 1985-10-02 | Schwermasch Liebknecht Veb K | TUBE BELT WELDER HORIZONTAL CONSTRUCTION WITH HOLLOWING EQUIPMENT |
| JP2020148448A (en) * | 2019-03-11 | 2020-09-17 | 株式会社神戸製鋼所 | Vaporization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896981B (en) * | 2015-05-08 | 2017-03-08 | 北京建筑大学 | Energy automatically cleaning and the sewage heat exchanger of scale suppression |
| CN206001954U (en) * | 2016-06-30 | 2017-03-08 | 山东农业大学 | A kind of sewage heat exchanger of employing tilt flat plate heat-transfer surface |
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2020
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7369874A (en) * | 1973-10-23 | 1976-04-01 | Baltimore Airton Company, Inc | Water distribution system for heat exchangers |
| DD228041A1 (en) * | 1984-10-25 | 1985-10-02 | Schwermasch Liebknecht Veb K | TUBE BELT WELDER HORIZONTAL CONSTRUCTION WITH HOLLOWING EQUIPMENT |
| JP2020148448A (en) * | 2019-03-11 | 2020-09-17 | 株式会社神戸製鋼所 | Vaporization device |
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