1. The online circulation heating unit is characterized in that: the device comprises a primary coarse filter tank, wherein a primary coarse filter tank is separated into a primary coarse filter area and a primary coarse filter area by a coarse filter screen layer in the primary coarse filter tank, a vertical sludge pump is installed in the primary coarse filter area, the vertical sludge pump is connected with a secondary vibration separation screen, a vibration filter screen layer is arranged in the secondary vibration separation screen, an upper outlet and a lower outlet are respectively arranged above and below the vibration filter screen layer, the upper outlet is installed on a ton bag frame, a tertiary fine filter tank is arranged below the lower outlet, the tertiary fine filter tank is separated into a fine filter area and a fine filter area by an adsorption layer in the tertiary fine filter tank, a transfer water pump is installed in the fine filter area, the transfer water pump is connected with a transition storage tank, a water outlet on one side of the transition storage tank is connected with a water return pump, the return water pump is connected with a heating group, and the heating group is connected with a thermal cleaning device.

2. The on-line circulation heating unit of claim 1, wherein: heating element contain the box, be provided with the one-level cartridge heater and the second grade cartridge heater of vertical installation in the box, and electromagnetic heating coil is installed respectively in the outside of these two cartridge heaters, the one-level export of one-level cartridge heater upper end and the second grade import pipeline connection of second grade cartridge heater lower extreme, the second grade export of second grade cartridge heater upper end is connected with hot cleaning equipment, the one-level access connection of return water pump and one-level cartridge heater bottom.

3. The on-line circulation heating unit of claim 1, wherein: and a temperature detection sensor is arranged above the water outlet in the transition storage tank.

Background

Labels are attached to recycled PET plastic bottles, and the types of labels are as follows: PVC/PET thermal contraction film, viscidity BOPP film, self-adhesive label paper, etc., wherein the self-adhesive label paper stuck is difficult to be removed by mechanical method, the hot water with 80-100 ℃ is needed to soften or dissolve the stuck label paper and EVA adhesive or other adhesives in the cleaning process, and in order to prevent the dropped adhesive from sticking PET bottle flakes, additives such as alkali, emulsifier or other special chemical agents are needed to be added into the water. In the PET plastic bottle cleaning and recycling industry, a thermal cleaning machine is generally adopted to clean PET bottle flakes, and the thermal cleaning machine comprises: the chassis is installed on the chassis and is washd the barrel, washs the barrel top and is provided with the feed inlet, and the feed inlet below is provided with the overflow mouth, installs steam coil in the wash barrel, washs the barrel bottom and installs ejection of compact spiral. During operation, the steam coil pipe is connected with the steam generator through a pipeline, steam generated by the steam generator enters the steam coil pipe to exchange heat with cleaning solution in the heat cleaning machine, and the temperature required by cleaning is achieved. The steam generator can be divided into a gas steam generator, a fuel steam generator, an electric heating steam generator and the like according to fuel, when the gas steam generator or the fuel steam generator is adopted, carbon dioxide can be generated by combustion, smoke dust, sulfur dioxide and other atmospheric pollutants, the discharged concentration must meet strict standard requirements, wherein the carbon dioxide is one of the global warming, the greenhouse effect can be caused, the sulfur dioxide in the atmosphere is dissolved in water to form sulfurous acid, the sulfurous acid is further oxidized, sulfuric acid can be rapidly and efficiently generated, and acid rain is formed. No matter what combustion mode is adopted, the generated steam enters a steam coil pipe in the heat cleaning machine to exchange heat with cleaning solution, and heat loss can be generated in the steam conveying and heat exchange processes. In the cleaning process, part of the cleaning solution after heat exchange is discharged out of the thermal cleaning machine from the overflow port, the part of the cleaning solution enters the water for treatment and then returns to the thermal cleaning machine, the returned cleaning solution is in a normal temperature state, and residual heat in the overflowed cleaning solution cannot be recycled.

Disclosure of Invention

The invention aims to provide an on-line circulation heating unit which is simple in structure, reasonable in design and convenient to use, aiming at the defects and shortcomings of the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the device comprises a primary coarse filter tank, wherein a primary coarse filter tank is separated into a primary coarse filter area and a primary coarse filter area by a coarse filter screen layer in the primary coarse filter tank, a vertical sludge pump is installed in the primary coarse filter area, the vertical sludge pump is connected with a secondary vibration separation screen, a vibration filter screen layer is arranged in the secondary vibration separation screen, an upper outlet and a lower outlet are respectively arranged above and below the vibration filter screen layer, the upper outlet is installed on a ton bag frame, a tertiary fine filter tank is arranged below the lower outlet, the tertiary fine filter tank is separated into a fine filter area and a fine filter area by an adsorption layer in the tertiary fine filter tank, a transfer water pump is installed in the fine filter area, the transfer water pump is connected with a transition storage tank, a water outlet on one side of the transition storage tank is connected with a water return pump, the return water pump is connected with a heating group, and the heating group is connected with a thermal cleaning device.

Further, the heating group contain the box, be provided with the one-level cartridge heater and the second grade cartridge heater of vertical installation in the box, and electromagnetic heating coil is installed respectively in the outside of these two cartridge heaters, the one-level export of one-level cartridge heater upper end and the second grade import pipe connection of second grade cartridge heater lower extreme, the second grade export of second grade cartridge heater upper end is connected with hot cleaning equipment, the one-level access connection of return water pump and one-level cartridge heater bottom.

Furthermore, a temperature detection sensor is arranged above the water outlet in the transition storage tank.

After adopting the structure, the invention has the beneficial effects that: the online circulation heating unit is clean and pollution-free in an electromagnetic heating mode, directly acts on the cleaning solution, reduces the heat exchange times, reduces the heat loss, can timely recover the residual heat in the cleaning solution in online circulation use, achieves the energy-saving effect, and has the advantages of simple structure, reasonable arrangement, low manufacturing cost and the like.

Drawings

FIG. 1 is a block diagram of the present invention;

fig. 2 is a top view of fig. 1.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Referring to fig. 1-2, the following technical solutions are adopted in the present embodiment: the device comprises a primary coarse filter tank 1, a primary coarse filter tank 1 is divided into a primary coarse filter front region 3 and a primary coarse filter rear region 4 by a coarse filter screen layer 2 in the primary coarse filter tank 1, a vertical sludge pump 5 is installed in the primary coarse filter rear region 4, the vertical sludge pump 5 is connected with a secondary vibration separation screen 6, a vibration filter screen layer 7 is installed in the secondary vibration separation screen 6, an upper outlet 8 and a lower outlet 10 are respectively arranged above and below the vibration filter screen layer 7, the upper outlet 8 is installed on a ton bag frame 9, a tertiary fine filter tank 11 is arranged below the lower outlet 10, an adsorption layer 12 in the tertiary fine filter tank 11 divides the tertiary fine filter tank 11 into a fine filter front region 13 and a fine filter rear region 14, a transfer water pump 15 is installed in the fine filter rear region 14, the transfer water pump 15 is connected with a transition storage tank 16, a water outlet 17 on one side of the transition storage tank 16 is connected with a water return pump 18, the water return pump 18 is connected with the heating group 20, and the heating group 20 is connected with the hot cleaning equipment.

Heating group 20 contain box 21, be provided with the one-level heating cylinder 22 and the second grade heating cylinder 23 of vertical installation in the box 21, and the outside of these two heating cylinders is installed electromagnetic heating coil 24 respectively, the one-level export 26 of one-level heating cylinder 22 upper end and the second grade import 27 pipe connection of second grade heating cylinder 23 lower extreme, the second grade export 28 of second grade heating cylinder 23 upper end is connected with hot cleaning equipment, the one-level import 25 of return water pump 18 and one-level heating cylinder 22 bottom is connected.

And a temperature detection sensor 19 is arranged above the water outlet 17 in the transition storage tank 16.

The working principle of the specific embodiment is as follows: cleaning solution containing various impurities flows into a rough filtering front area 3 in a primary rough filtering box 1 from an overflow port of hot cleaning equipment, a rough filtering screen layer 2 separates solid impurities with larger sizes such as bottle caps and anti-theft rings, the cleaning solution after rough filtering is conveyed to a secondary vibration separation screen 6 under the action of a vertical sludge pump 5, a vibration filtering screen layer 7 in the secondary vibration separation screen 6 separates solid particles such as silt and label paper, the solid particles such as the silt and the label paper are conveyed into ton bags in a ton bag frame 9 through an upper outlet 8 under the action of vibration, cleaning solution after vibration filtration enters a fine filtration front area 13 in a third-stage fine filtration tank 11 through a lower outlet 10, an adsorption layer 12 in the third-stage fine filtration tank 11 can realize separation of floccules such as adhesives, the separated cleaning solution is conveyed to a transition storage tank 16 through a transfer water pump 15, and the cleaning solution is conveyed to a heating unit 20 through a return water pump 18; the primary heating cylinder 22 and the secondary heating cylinder 23 in the heating group 20 realize energy conversion by adopting electromagnetic heating, the principle of the electromagnetic heating is that alternating current is utilized to generate an alternating magnetic field, so that eddy current is generated in a metal conductor in the heating group, the eddy current enables atoms in the metal conductor to move randomly at a high speed, and the atoms collide and rub with each other to generate heat energy, so that the effect of rapid heating is achieved, because the metal conductor generates heat by itself, the efficient energy conversion efficiency is achieved, and in the conversion process, no atmospheric pollutants such as carbon dioxide, smoke dust, sulfur dioxide and the like are generated; the primary heating cylinder 22 and the secondary heating cylinder 23 are vertically installed, and the contact area of the cleaning solution with the primary heating cylinder 22 and the secondary heating cylinder 23 is maximized, so that the energy conversion efficiency is improved; a temperature detection sensor 19 mounted on the transition storage tank 16 monitors the temperature of the cleaning solution in the tank in real time to determine whether electromagnetic heating needs to be started.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.