JP2023078815A - Condenser with scraper - Google Patents

Abstract

To provide a condenser with a scraper capable of enhancing the overall oil recovery rate by continuously discharging dust, carbides, and highly viscous substances caused to adhere during the process of cooling the high-temperature oil-containing gas in the heat exchange device, as well as, by preventing the oil components remaining in highly viscous deposits from being removed together.SOLUTION: A condenser with a scraper comprises: a scraper part punched into a cross-sectional shape of a heat exchanging part and movably provided; a transfer screw part installed inclinedly; and a screw case part with oil discharge ports provided at one side of end parts thereof, and a residue discharge port provided at the other side of the end parts thereof. Vanes of the transfer screw part are provided with a number of oil discharge holes passing therethrough.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a condenser with a scraper for preventing deterioration of heat exchange efficiency and improving oil recovery rate. By continuously separating and discharging the highly viscous decomposed matter that adheres to the surface, the heat exchange efficiency is prevented from decreasing, and the oil component that exists together in the separated and discharged highly viscous decomposed matter is separated and recovered. Thus, it relates to a condenser with a scraper that can be prevented from being disposed of with highly viscous cracks, thereby improving overall oil recovery.

Recently, with the development of energy recovery technology, steam is produced using heat energy generated by burning combustible materials such as sawdust and vinyl or combustible waste, or electricity is produced from the produced steam. Rather than the method of thermally decomposing combustible substances at high temperatures and recovering them as pyrolysis gas, electricity can be generated directly by gas generators, or thermally decomposing them at medium temperatures and recovering them as pyrolysis oil for heavy oil power generation. A number of highly efficient energy recovery techniques have been disclosed, such as the use of energy as fuel, or as fuel oil.

In general, methods of recovering energy from combustible substances are divided into incineration methods and pyrolysis methods. Fundamentally, incineration methods must supply oxygen by burning combustible substances to obtain thermal energy. The thermal decomposition method is a method in which only heat is supplied without supplying oxygen. During thermal decomposition, combustible gas, oil , is recovered as carbide (charcoal, etc.). Pyrolysis methods are known to exhibit higher energy recovery efficiencies than incineration methods.

On the other hand, the thermal decomposition temperature also varies depending on the substance to be thermally decomposed. (C) Since it is a cellulosic substance with a low degree of superposition of C50 or less, the temperature at which it is thermally decomposed is 300° C. to 350° C. in the case of a polymer substance, and 500° C. to 550° C. in the case of a cellulosic substance. Thermal decomposition often occurs at °C.

As anyone can understand, the above-mentioned oil conversion process includes a thermal decomposition process in which biomass such as wood is heated and decomposed in a non-oxygen atmosphere to obtain gaseous oil-containing components, and a gaseous oil-containing component. It can be divided into fractional distillation steps that liquefy and separate the constituents.

To explain this more specifically, first, biomass such as wood is cut or crushed into appropriate sizes, and then the selected biomass is charged into the inlet of the cracking furnace.

The biomass charged into the cracking furnace is heated to 300° C. to 600° C. by heating means while moving along the cracking furnace by means of a screw conveyor, whereby the biomass is cracked into oil-containing components. The undecomposed residue (ash) such as biochar is discharged to the outside of the decomposition furnace by a screw conveyor.

The oil-containing components cracked and produced in the cracking furnace are introduced into the heat exchanger in a gaseous state through the gas outlet, liquefied and separated, and then transferred to the storage facility and stored after the post-treatment process. .

On the other hand, the gaseous oil-containing component introduced into the heat exchange device passes through thin heat exchange tubes in the condensation process. At this time, the gaseous oil-containing component passing through the heat exchange tube is It is condensed and produced as recycled oil.

However, the above gaseous oil-containing components include not only oil components but also high-viscosity polymer (wax) components and dust. In the process of (1), there is a problem that the heat transfer effect is hindered by being adhered to the wall of the heat exchange tube and being fixed, and the rapid cooling of the pyrolysis gas is also affected.

In order to solve this problem, Korean Patent Publication No. 2016-0082796 and Korean Patent Registration No. 1147993 propose a method of scraping and removing high-viscosity substances adhering to a heat exchange device using a scraper. However, there has been a problem that means for treating the removed highly viscous deposits are not adequately provided.

As described above, the highly viscous deposits removed from the heat exchange device are oil-containing substances, and the oil vapor component is also collected during the cooling process. Adhered substances contain oil components together, and when such highly viscous adherents are removed (collected and removed) and disposed of, a large amount of oil is also disposed of, so it can be recovered. There was a problem that not only the oil recovery rate was low, but also the thermal cracking efficiency was inferior.

Furthermore, even if a separate device is used to recover the residual oil from the highly viscous deposits collected from the heat exchange device, the oil recovery device must be installed separately, so the volume of the entire device increases. However, the collected high-viscosity deposits are difficult to transport and maintain due to their high viscosity, and there is a risk of safety accidents such as fires when discharged at a temperature higher than the spontaneous ignition point. .

As a result, improvements in the structure of conventional heat exchangers have been demanded, and at the same time, there has emerged a need for a condenser capable of simultaneously improving the function of removing highly viscous deposits and the cooling performance.

Korean Patent No. 2016-0082796 (Publication date: July 11, 2016) Korean Registered Patent No. 1147993 (Publication date: October 6, 2011)

The main object of the present invention is to solve such problems, and the object is to continuously remove dust, carbides and highly viscous substances adhered during the process of cooling high-temperature oil-containing gas in a heat exchange device. In addition, when the high-viscosity deposits including carbides are discharged, the oil components remaining in the high-viscosity deposits are prevented from being removed together, thereby improving the overall oil recovery rate. To provide a condenser with a scraper capable of improving

In order to achieve the above object, one embodiment of the present invention is a condenser with a scraper that collects oil by condensing an oil-containing gas, wherein the condenser with a scraper passes through the oil-containing gas. a housing provided with an inflow portion and a gas discharge portion, and an oil recovery hopper portion provided on the bottom surface; a heat exchange portion for cooling the oil-containing gas flowing in from the inflow portion of the housing; and the heat exchange portion. A scraper part punched into the cross-sectional shape of the heat exchange part and movably provided so as to scrape and collect oil-containing substances adhered to the scraper part; and an oil recovery section disposed below the scraper section and extending along the length of the scraper section to transfer the oil-containing material collected by the scraper section. Meanwhile, the oil is discharged from the blades installed on the rotating shaft, which are inclined at a predetermined angle with respect to the horizontal plane so as to compress and discharge the oil contained in the oil-containing material. a transfer screw portion in which a plurality of oil discharge holes are provided on a non-coaxial line; and an oil drain that accommodates the transfer screw portion and discharges the oil separated by the transfer screw portion on one side. a screw case part provided with an outlet, and a screw case part provided on the other side with a residue discharge port for discharging the residue from which oil has been removed by the transfer screw part. I will provide a.

In a preferred embodiment of the present invention, the diameter of the oil discharge hole of the transfer screw may be reduced from the rear end to the tip of the transfer screw.

In a preferred embodiment of the present invention, the oil outlet of the screw case portion is provided with a screen mesh for blocking discharge of residue through the oil outlet. can be done.

In a preferred embodiment of the present invention, the transfer screw part may have a brush on the rotary shaft at a position corresponding to the oil outlet.

In a preferred embodiment of the invention, said transfer screw portion may be characterized by being fitted with a heating member and/or a vibrating member.

In a preferred embodiment of the present invention, the screw case part is provided with a compression plate provided with an oil discharge hole on the front side for compressing and transferring the oil-containing material while the blades of the transfer screw part rotate. can be characterized by

In a preferred embodiment of the present invention, said scraper part may be characterized in that both ends are actuated simultaneously by drive means included in the group consisting of belt, rack, pinion, cylinder and screw. .

In the condenser with a scraper according to the present invention, the scraper continuously removes the highly viscous deposits adhered to the heat exchange tube in the process of cooling the high temperature oil-containing gas in the heat exchange section. By keeping the exchange equipment clean at all times, it is possible to maintain excellent heat exchange efficiency for oil-containing gas for a long period of time, and to prevent deterioration of heat exchange efficiency due to highly viscous deposits. By separating and recovering the oil remaining on the highly viscous deposits in the oil recovery part including the transfer screw part from the highly viscous deposits collected by the unit, the oil recovery rate can be improved. This has the effect of preventing a decrease in the heat exchange efficiency of the heat exchange surface of the condenser.

1 is a schematic side view of a scraped condenser according to one embodiment of the present invention; FIG. 1 is a schematic back view of a scraped condenser according to one embodiment of the present invention; FIG. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1; FIG. 2 is a cross-sectional view taken along line BB of FIG. 1;

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is well known and commonly used in the art.

Terms such as "comprising," "including," or "having," as described herein, are used to indicate that the features, values, steps, acts, components, parts, or combinations thereof described herein are present. and does not exclude the possibility that there may be other features, values, steps, acts, components, parts, or combinations thereof that are not described.

The present invention is a condenser with a scraper that collects oil by condensing an oil-containing gas, wherein the condenser with a scraper is provided with an inflow part and a gas discharge part so that the oil-containing gas passes through, and a bottom surface is provided with a hopper portion for collecting oil, a heat exchange portion that cools the oil-containing gas that has flowed in from the inflow portion of the housing, and scrapes and collects the oil-containing substances adhered to the heat exchange portion. and an oil recovery section for separating and recovering oil from the oil-containing material collected from the scraper section, wherein the oil recovery section includes: is disposed below the scraper part and extends along the length direction of the scraper part, and conveys the oil-containing material collected by the scraper part while squeezing and discharging the oil contained in the oil-containing material. For this purpose, the transfer screw is tilted to have a predetermined included angle with respect to the horizontal plane and has a large number of oil discharge holes provided non-coaxially on the blade portion provided on the rotating shaft. and the transfer screw part are housed inside, one side is provided with an oil outlet through which the oil separated by the transfer screw part is discharged, and the other side is provided with an oil discharge port where the oil is removed by the transfer screw part. and a screw case portion provided with a residue discharge port through which residue is discharged.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 to 4, the oil recovery heat exchange device 100 according to the present invention comprises a housing 110, a heat exchange section 120, a scraper section 130 and an oil recovery section 140. As shown in FIG.

The housing 110 is a hollow structure with an open interior, and has a cylindrical or box shape. A gas discharge part 112 for discharging uncooled, uncondensed gas from the heat exchange part 120 is provided, and a hopper part 113 for collecting (collecting/removing) the collected oil is provided on the bottom surface.

The oil-containing gas flowing into the housing is oil-containing gas, which is collected by a fan or a gas inflow pump (not shown) and supplied to the interior of the housing for continuous operation. to prevent the oil-containing gas that has flowed into the housing from flowing back. At this time, the positions of the inflow part 111 and the gas discharge part 112 can be adjusted according to the heat exchange part 120 installed inside the housing, which will be described later.

The heat exchange part 120 cools the oil-containing gas that has flowed into the housing through the inflow part, and is in contact with the high-temperature oil-containing gas that has flowed into the housing so that waste heat can be recovered through heat exchange. A heat medium such as cold air, cooling water, or oil is introduced into the heat exchange tube 121, and forced circulation is performed by a separate circulation structure such as a pump. Here, the heat exchange tubes may be detachably installed inside the housing so as to form multiple rows and multiple columns.

The heat exchange pipes 121 are provided with a heat medium injection part 122 and a heat medium discharge part 123 each provided with a valve so that the heat medium can be easily supplied and removed. Therefore, the heat exchange efficiency can be further improved by adjusting the conditions of the heat medium injected into the heat exchange tube.

The heat exchange unit 120 produces liquid oil by condensing the oil-containing gas through the heat exchange tube into which the heat medium is introduced. The tar, dust, wax components, and other highly viscous deposits contained in the oil-containing gas adhere to the outer peripheral surface of the heat exchange tube due to their viscosity during the cooling process.

The highly viscous deposits adhered to the outer peripheral surface of the heat exchange tube are separated and discharged from the heat exchange section by the scraper section 130, thereby excellently maintaining the heat exchange efficiency of the oil-containing gas in a high state for a long time. be able to.

The scraper part 130 is provided with a through-hole having a cross-sectional shape of the heat exchange tube at a position corresponding to the heat exchange part, i.e., the heat exchange tube, so as to remove highly viscous deposits that are transported along the heat exchange part and adhered. is provided, and installed in a state in which a plurality of heat exchange tubes are accommodated in the through holes. For this reason, when the scraper part is linearly reciprocated in the length direction of the heat exchange tube, the edge of the scraper is moved along the outer peripheral surface of the heat exchange tube, and the adhered highly viscous deposits, that is, oil-containing substances, are removed. Remove things by scraping.

At this time, both ends of the scraper part are operated simultaneously by driving means 131 including belts, racks, pinions, cylinders, screws and the like. Since the scrapers are operated at the same time, even if the scrapers are expanded, the driving means provided at both ends are operated at the same time to act on the transfer force. This has the advantage that wear of the heat exchange tubes is prevented.

In addition, when the scraper portion is operated, the oil-containing material adhered to the heat exchange portion is quickly removed and the viscosity is lowered, so that it does not stick to the surface of the heat exchange portion and can be easily collected by the scraper portion. be removed.

The oil-containing material collected by the scraper section may be discharged to the oil recovery section, or collected in a collection hopper section (not shown) and then discharged to the oil recovery section.

The oil recovery unit 140 is a means for separating the remaining oil and the remaining residue from the oil-containing material collected by the collection hopper unit, and comprises a transfer screw unit 145 and a screw case unit 150. include.

The transfer screw part 145 is a means for separating and transferring the oil remaining in the oil-containing material and the residue other than the oil. Extending at a predetermined included angle with respect to a horizontal plane for squeezing oil remaining in the oil-containing material to separate the oil from the oil-containing material while rotatingly transferring the oil-containing material collected by the scraper portion. Installed tilted upwards. At this time, the complementary angle of the inclined included angle, that is, the included angle with the vertical line can be 5° to 70°, preferably 10° to 30° in terms of the size of the device or oil recovery. sell.

In addition, the transfer screw portion 145 is provided with a plurality of oil discharge holes 148 penetrating through the blade portion 147 on the rotary shaft 146 so as to discharge the oil separated from the oil-containing material. Here, the oil discharge holes are provided on the blade surfaces of the screw, but on adjacent blade surfaces, they are arranged on imaginary collinear (coaxial) lines that are parallel to the axis of the screw and spaced apart in the direction perpendicular to the axis. is not provided in Preferably, the oil discharge holes are the farthest from each other on the adjacent blade surfaces, so that fine particles such as dust contained in the oil-containing material are also squeezed together with the oil through the oil discharge holes. It is possible to prevent the oil from migrating to the oil discharge part side through the

In addition, the diameter of the oil discharge hole can be reduced from the rear end portion of the transfer screw portion, which is the portion on the oil discharge port side, toward the tip portion, which is the portion on the residue discharge port side.

If the oil discharge holes 148 provided in the adjacent vanes of the transfer screw part are arranged on a coaxial line, or the diameter of the oil discharge holes increases toward the tip of the transfer screw part. If it becomes large, fine particles such as dust contained in the oil-containing material may migrate to the oil discharge part side through the oil discharge hole in the process of being squeezed together with the oil. The oil discharge holes are preferably arranged on a non-coaxial line, and the diameter of the oil discharge holes preferably decreases toward the tip of the screw portion.

On the other hand, the rotation shaft of the transfer screw portion is provided with a brush 149 at a position corresponding to the oil discharge port 151 of the screw case portion 150, which will be described later. By brushing, it is possible to fundamentally prevent clogging of the oil outlet with sludge or the like.

In addition, the transfer screw part may include a heating member (not shown) such as a heating wire or an induction heating device capable of heating the transfer screw part, or a vibrating member (not shown) capable of applying vibration to the transfer screw part. ) is installed, it is possible to reduce the adhesive force of highly viscous oil-containing substances, so that rotational transfer and separation from oil can be performed smoothly.

Such a transfer screw part 145 is housed in the screw case part 150, and along with the rotation of the transfer screw part, it is possible to easily separate the oil from the oil-containing material due to the compression and frictional force with the screw case part.

The screw case part 150 is provided with an oil discharge port 151 for receiving oil-containing material collected from the scraper part and discharging the oil separated by the transfer screw part 145 at one side. The other side of the is provided with a residue discharge port 152 through which the residue from which oil has been removed by the transfer screw part is discharged.

Here, a fine screen (not shown) is installed at the oil discharge port 151 of the screw case to block discharge of residues other than oil, and the blades of the transfer screw rotate. A compression plate 153 with an oil discharge hole (not shown) is provided on the front side for compressing and transporting the oil-containing material so that the oil-containing material is effectively compressed, and the residue discharge port side has A scrap blade (not shown) may be provided to separate the residue from which the oil has been removed by squeezing from the transfer screw portion and to easily discharge the residue to the residue outlet side.

The oil recovered from the screw case is stored in an oil reservoir (not shown) through the oil recovery hopper 113, and the residue from which the oil has been removed is stored through the residue outlet. It can be stored in a compartment (not shown) and used for each application.

In the oil recovery heat exchange device according to the present invention described above, the scraper portion 130 continuously separates and removes the highly viscous deposits that adhere while the high-temperature oil-containing gas is cooled in the heat exchange portion 120. By keeping the heat exchange device clean at all times, the heat exchange efficiency of the oil-containing gas can be maintained excellent for a long time. By separating and recovering the oil remaining on the highly viscous deposits in the oil recovery part 140 including the transfer screw part, it is possible to prevent the generation of wasted oil and improve the oil recovery rate.

Although the present invention has been described by the preferred embodiments, the above-described embodiments merely illustrate the technical idea of the present invention. Variations are possible as will be appreciated by those of ordinary skill in the art. Therefore, the protection scope of the present invention should be construed by the matters described in the claims rather than by the specific embodiments, and all technical ideas within the equivalent scope are also subject to the right of the present invention. should be construed as included in the scope.

REFERENCE SIGNS LIST 100 oil recovery heat exchanger 110 housing 120 heat exchange section 130 scraper section 140 oil recovery section 145 transfer screw section 150 screw case section

Claims (6)

In an oil recovery condenser that recovers oil by condensing oil-containing gas,
The condenser is
a housing provided with an inflow portion and a gas discharge portion through which the oil-containing gas passes, and a bottom surface provided with an oil recovery hopper portion;
a heat exchange part that cools the oil-containing gas that has flowed in from the inflow part of the housing;
a scraper section punched into the cross-sectional shape of the heat exchange section and movably provided so as to scrape and collect the oil-containing material adhered to the heat exchange section;
an oil recovery unit that separates and recovers oil from the oil-containing material collected from the scraper unit;
The oil recovery unit is
It is arranged in the lower part of the scraper part and is provided to extend along the length direction of the scraper part, and conveys the oil-containing material collected by the scraper part, and squeezes and discharges the oil contained in the oil-containing material. , the transfer screw section is installed at an angle with a predetermined included angle with respect to the horizontal plane, and the blade section provided on the rotating shaft is provided with a large number of oil discharge holes through which the oil is discharged. and,
The transfer screw part is accommodated inside, and one side is provided with an oil discharge port through which the oil separated by the transfer screw part is discharged, and the other side is provided with a residue after the oil is removed by the transfer screw part. a screw case portion provided with a residue outlet to be discharged,
The oil discharge holes are provided on the blade surfaces of the screw, and on adjacent blade surfaces, are provided on an imaginary collinear line that is parallel to the shaft of the screw and vertically separated from the outer peripheral surface of the shaft. A condenser with a scraper for preventing a decrease in heat exchange efficiency. The diameter of the oil discharge hole of the transfer screw portion is reduced from the rear end portion of the transfer screw portion on the oil discharge port side to the tip portion of the transfer screw portion on the residue discharge port side. , The condenser with a scraper for preventing deterioration of heat exchange efficiency according to claim 1. 2. The lowering of heat exchange efficiency as set forth in claim 1, wherein the oil outlet of the screw case part is provided with a screen mesh for blocking discharge of residue through the oil outlet. Condenser with scraper for prevention. 2. The condenser with a scraper for preventing deterioration of heat exchange efficiency according to claim 1, wherein the transfer screw part is provided with a brush on a rotating shaft at a position corresponding to the oil outlet. 2. The condenser with a scraper for preventing deterioration of heat exchange efficiency according to claim 1, wherein the transfer screw part is provided with a heating member and/or a vibrating member. [Claim 2] The prevention of deterioration of heat exchange efficiency according to claim 1, wherein the scraper part is equipped with driving means included in the group consisting of a belt, a rack, a pinion, a cylinder and a screw so that both ends thereof operate simultaneously. Condenser with scraper for.

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