CN109606604B - Liquid asphalt cargo hold heating system and heating method - Google Patents
Liquid asphalt cargo hold heating system and heating method Download PDFInfo
- Publication number
- CN109606604B CN109606604B CN201811487102.5A CN201811487102A CN109606604B CN 109606604 B CN109606604 B CN 109606604B CN 201811487102 A CN201811487102 A CN 201811487102A CN 109606604 B CN109606604 B CN 109606604B
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- heating
- heating coil
- tower
- cargo hold
- fixing frame
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 266
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- 239000010426 asphalt Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005192 partition Methods 0.000 claims description 5
- 230000001737 promoting effect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
- B63J2/14—Heating; Cooling of liquid-freight-carrying tanks
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Road Paving Structures (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a heating system and a heating method for a liquid asphalt cargo hold, and belongs to the technical field of liquid asphalt cargo hold heating. The heating system includes: the device comprises a heating device, a plurality of groups of heating coils and a tower-type fixing frame, wherein the tower-type fixing frame is positioned in the middle of a cargo hold, at least one group of heating coils are arranged on the periphery and the inner wall of the tower-type fixing frame, an upper layer of heating coils and a lower layer of heating coils are arranged at the bottom of the cargo hold, and at least one group of heating coils is arranged on each layer; the invention also provides a heating method of the heating system, wherein the heating system can increase natural convection intensity in the cargo hold, improve the heating speed of goods, ensure the heating uniformity of the cargo hold, prevent local overtemperature, ensure that the heating is more uniform due to opposite flow directions of heating media, and enhance the fluidity of liquid asphalt in the whole cargo hold without auxiliary equipment to realize internal flow due to the design of a heating tower, thereby promoting heat conduction, saving energy and protecting environment.
Description
Technical Field
The invention relates to the technical field of heating of liquid asphalt cargo holds, in particular to a liquid asphalt cargo hold heating system and a liquid asphalt cargo hold heating method.
Background
With the development of social economy, the cargo hold of asphalt ships is bigger and bigger, and especially in long-distance transportation, and the whole process of loading, unloading and transportation of asphalt needs heating and heat preservation, so that a heating method is extremely important, and the viscosity of asphalt and the temperature needed for transportation are different from other common chemicals. Conventional heating systems do not meet the heating requirements of the cargo holds of asphalt ships.
For common goods, the density and the viscosity of the goods are relatively small, natural convection phenomenon can occur in the cargo hold after the goods are heated, and the whole cargo hold can be basically heated uniformly along with the change of heating time. However, if the goods are asphalt, the temperature is higher because the liquid asphalt is transported, the temperature is usually higher than 180 ℃, the viscosity of the asphalt is higher, the heat conduction performance is poor, the natural convection of heating is slow, the heating coil is arranged at the bottom of the cargo hold in the prior art, the temperature of the bottom of the cargo hold is easy to exceed the heating temperature, the upper part of the cargo hold does not reach the heating temperature yet, and the temperature of the top of the cargo hold can not reach the temperature required by transportation as soon as possible due to the characteristic problem of the asphalt.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a heating system and a heating method for a liquid asphalt cargo hold.
The invention provides a heating system of a liquid asphalt cargo hold, which comprises the following components: the device comprises a heating device, a plurality of groups of heating coils and a tower-type fixing frame, wherein the tower-type fixing frame is positioned in the middle of a cargo hold, at least one group of heating coils are arranged on the periphery and the inner wall of the tower-type fixing frame, an upper layer of heating coils and a lower layer of heating coils are arranged at the bottom of the cargo hold, and at least one group of heating coils is arranged on each layer; and the plurality of groups of heating coils are communicated with the heating device through the circulating pump to form a circulating loop.
Preferably, the multiunit heating coil is first heating coil, and second heating coil, third heating coil and fourth heating coil, two-layer equal tiling in the cargo hold bottom about first heating coil and second heating coil divide, and the second heating coil is located first heating coil's below, the bottom of tower type mount is fixed in the bottom of cargo hold, and third heating coil lays the periphery at tower type mount, and fourth heating coil lays the inner wall at tower type mount, and third heating coil and fourth heating coil all evenly lay along the direction of height of tower type mount, and third heating coil and fourth heating coil are all fixed with tower type mount through the pipe clamp, first heating coil, second heating coil, third heating coil and fourth heating coil all communicate with heating device through the circulating pump and form circulation loop.
Preferably, the first heating coil, the second heating coil, the third heating coil and the fourth heating coil are arranged in an arch shape, the hot oil flow directions in the first heating coil and the second heating coil are opposite, and the hot oil flow directions in the third heating coil and the fourth heating coil are opposite.
Preferably, the first heating coil is 120-160mm from the floor and the second heating coil is 120-160mm from the first heating coil.
Preferably, the partition plates are arranged in the heating coils of the plurality of groups, the partition plates divide the inside of the coils into two channels, the ports of the two channels are respectively and hermetically connected with a connecting pipe, and the two channels are communicated with the heating device through the connecting pipes to form two circulating channels with opposite heat medium flow directions.
Preferably, the height of the tower-type fixing frame is 2/5-4/5 of the height of the warehouse.
Preferably, the heating device is provided with a liquid outlet end and a liquid inlet end, the liquid outlet end of the heating device is connected with a split conveyer, the liquid inlet end of the heating device is connected with a mixing conveyer, a plurality of liquid outlets arranged on the split conveyer are respectively communicated with the liquid inlet ends of a plurality of heating coils through a first control valve, the liquid outlet ends of the heating coils are communicated with the mixing conveyer through a second control valve, two circulating pumps are arranged between the mixing conveyer and the heating device, and the two circulating pumps are connected in parallel.
Preferably, the heating means is a hot oil heater.
Preferably, the upper end of the heating device is also communicated with an expansion heating medium tank.
The invention also provides a heating method of the liquid asphalt cargo hold heating system, which comprises the following steps:
s1, calculating heat required by heating according to the heating temperature required by liquid asphalt and the bilge, calculating the total length of a heating coil according to the heat conductivity coefficient of the heating coil, and equally dividing the heating coil into at least 4 groups;
s2, paving an upper layer of heating coils and a lower layer of heating coils on the bottom of the warehouse, wherein at least one group of heating coils is arranged on each layer;
s3, fixing a tower-shaped fixing frame at the center of the bottom of the warehouse, and arranging at least one group of heating coils on the periphery and the inner wall of the tower-shaped fixing frame;
s4, each heating coil is communicated with the heating device through a circulating pump to form a circulating loop.
Compared with the prior art, the invention has the beneficial effects that: according to the heating system, aiming at liquid asphalt with high viscosity and poor heat conduction performance, two layers of heating coils are arranged at the bottom of a cargo hold to heat the asphalt at the bottom of the cargo hold, a heating tower structure is formed by arranging the heating coils on a tower type fixing frame, the height of the heating tower is set to be 2/5-4/5 of the height of the cargo hold, the asphalt at the middle upper part of the cargo hold is heated, the natural convection intensity in the cargo hold is increased, the heating speed of goods is improved, the heating uniformity of the cargo hold is ensured, and local overtemperature is prevented;
secondly, the hot oil flow directions in the first heating coil and the second heating coil are opposite, the hot oil flow directions in the third heating coil and the fourth heating coil are opposite, and two paths of circulation channels with opposite heat medium flow directions are arranged in each of the plurality of groups of heating coils, so that the problem that the temperature difference between the front end heat medium and the rear end heat medium is large due to heat loss in the heating coils is solved, the heating is more uniform, and the problem of overhigh local temperature is avoided;
meanwhile, due to the design of the heating tower, the fluidity of the liquid asphalt in the whole warehouse is enhanced, the liquid asphalt near the periphery of the heating tower has good fluidity and continuously flows downwards under the action of gravity, so that the asphalt with lower middle and upper temperature gathers towards the heating tower, then flows downwards after reaching certain fluidity, and circulation is formed to promote heat conduction. The circulation process is energy-saving and environment-friendly without other auxiliary energy consumption equipment.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a section A method diagram of the present invention;
FIG. 3 is a schematic view of a heating coil with baffles according to the present invention;
reference numerals illustrate:
1. heating device, heating coil, first heating coil, second heating coil, third heating coil, fourth heating coil, separator, 26, connecting pipe, 3, tower type fixing frame, 4, circulating pump, 5, distributor, 6, mixer, 7, expansion heat medium box.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to fig. 1-3, but it should be understood that the scope of the present invention is not limited by the specific embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a heating system of a liquid asphalt cargo hold, which comprises the following components: the heating device 1, a plurality of groups of heating coils 2 and a tower-type fixing frame 3, wherein the tower-type fixing frame 3 is positioned in the middle of the cargo hold, at least one group of heating coils 2 are arranged on the periphery and the inner wall of the tower-type fixing frame 3, an upper layer of heating coils 2 and a lower layer of heating coils 2 are arranged at the bottom of the cargo hold, and at least one group of heating coils 2 are arranged on each layer; the heating coils 2 are communicated with the heating device 1 through the circulating pump 4 to form a circulating loop.
The tower-type fixing frame can be a steel frame structure formed by welding.
Further, the plurality of groups of heating coils 2 are a first heating coil 21, a second heating coil 22, a third heating coil 23 and a fourth heating coil 24, the first heating coil 21 and the second heating coil 22 are uniformly paved at the bottom of the cargo hold in an upper layer and a lower layer, the second heating coil 22 is located below the first heating coil 21, the bottom of the tower-shaped fixing frame 3 is fixed at the bottom of the cargo hold, the third heating coil 23 is arranged at the periphery of the tower-shaped fixing frame 3, the fourth heating coil 24 is arranged on the inner wall of the tower-shaped fixing frame 3, the third heating coil 23 and the fourth heating coil 24 are uniformly arranged along the height direction of the tower-shaped fixing frame 3, the third heating coil 23 and the fourth heating coil 24 are all fixed with the tower-shaped fixing frame 3 through pipe clamps, and the first heating coil 21, the second heating coil 22, the third heating coil 23 and the fourth heating coil 24 are all communicated with the heating device 1 through the circulating pump 4 to form a circulating loop.
Further, the first heating coil 21, the second heating coil 22, the third heating coil 23 and the fourth heating coil 24 are all arranged in an arch shape, the hot oil in the first heating coil 21 and the second heating coil 22 flow oppositely, and the hot oil in the third heating coil 23 and the fourth heating coil 24 flow oppositely.
Further, the first heating coil 21 is 120-160mm from the floor and the second heating coil 22 is 21120-160mm from the first heating coil.
Further, the partition plates 25 are arranged in the heating coils 2 of the plurality of groups, the inside of the coils 2 is divided into two channels by the partition plates 25, ports of the two channels are respectively and hermetically connected with the connecting pipe 26, and the two channels are respectively communicated with the heating device 1 through the connecting pipe 26 to form two circulating channels with opposite heat medium flow directions.
Further, the height of the tower-shaped fixing frame 3 is 2/5-4/5 of the height of the warehouse.
Further, be equipped with liquid end and feed liquor end on the heating device 1, the liquid end of heating device 1 is connected with divides the defeated ware 5, and the feed liquor end of heating device 1 is connected with thoughtlessly defeated ware 6, divide a plurality of liquid outlets that are equipped with on defeated ware 5 respectively through first control valve and the feed liquor end intercommunication of a plurality of heating coil 2, the liquid end of a plurality of heating coil 2 all communicates with thoughtlessly defeated ware 6 through the second control valve, and two circulating pumps 4 are established between thoughtlessly defeated ware 6 and heating device 1, and two circulating pumps 4 parallel connection.
Further, the heating device 1 is a hot oil heater.
Further, the upper end of the heating device 1 is also communicated with an expansion heating medium tank 7.
The embodiment also provides a heating method of the liquid asphalt cargo hold heating system, which comprises the following steps:
s2, paving an upper layer of heating coils 2 and a lower layer of heating coils 2 on the bottom of the warehouse, wherein at least one group of heating coils 2 are arranged on each layer;
s3, fixing a tower-type fixing frame 3 at the center of the bottom of the warehouse, and arranging at least one group of heating coils 2 on the periphery and the inner wall of the tower-type fixing frame 3;
s4, each heating coil 2 is communicated with the heating device 1 through a circulating pump 4 to form a circulating loop.
In summary, the beneficial effects of the invention are as follows: according to the heating system, aiming at liquid asphalt with high viscosity and poor heat conduction performance, two layers of heating coils are arranged at the bottom of a cargo hold to heat the asphalt at the bottom of the cargo hold, a heating tower structure is formed by arranging the heating coils on a tower type fixing frame, the height of the heating tower is set to be 2/5-4/5 of the height of the cargo hold, the asphalt at the middle upper part of the cargo hold is heated, the natural convection intensity in the cargo hold is increased, the heating speed of goods is improved, the heating uniformity of the cargo hold is ensured, and local overtemperature is prevented;
secondly, the hot oil flow directions in the first heating coil and the second heating coil are opposite, the hot oil flow directions in the third heating coil and the fourth heating coil are opposite, and two paths of circulation channels with opposite heat medium flow directions are arranged in a plurality of groups of heating coils, so that the problem that the heat medium in the heating coils is lost, and the temperature difference between the heat medium at the front end and the heat medium at the rear end is large is solved, the heating is more uniform, and the problem of overhigh local temperature is avoided;
meanwhile, due to the design of the heating tower, the fluidity of the liquid asphalt in the whole warehouse is enhanced, the liquid asphalt near the periphery of the heating tower has good fluidity and continuously flows downwards under the action of gravity, so that the asphalt with lower middle and upper temperature gathers towards the heating tower, then flows downwards after reaching certain fluidity, and circulation is formed to promote heat conduction. The circulation process is energy-saving and environment-friendly without other auxiliary energy consumption equipment.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A liquid asphalt cargo space heating system, comprising: the heating device comprises a heating device (1), a plurality of groups of heating coils (2) and a tower-type fixing frame (3), wherein the tower-type fixing frame (3) is positioned in the middle of a cargo hold, at least one group of heating coils (2) are arranged on the periphery and the inner wall of the tower-type fixing frame (3), an upper layer of heating coils (2) and a lower layer of heating coils (2) are arranged at the bottom of the cargo hold, and at least one group of heating coils (2) are arranged on each layer; the plurality of groups of heating coils (2) are communicated with the heating device (1) through the circulating pump (4) to form a circulating loop;
the multi-group heating coil (2) is a first heating coil (21), a second heating coil (22), a third heating coil (23) and a fourth heating coil (24), wherein the first heating coil (21) and the second heating coil (22) are uniformly paved at the bottom of the cargo hold in an upper layer and a lower layer, the second heating coil (22) is positioned below the first heating coil (21), the bottom of the tower-shaped fixing frame (3) is fixed at the bottom of the cargo hold, the third heating coil (23) is arranged at the periphery of the tower-shaped fixing frame (3), the fourth heating coil (24) is arranged on the inner wall of the tower-shaped fixing frame (3), the third heating coil (23) and the fourth heating coil (24) are uniformly arranged along the height direction of the tower-shaped fixing frame (3), the third heating coil (23) and the fourth heating coil (24) are uniformly fixed with the tower-shaped fixing frame (3) through pipe clamps, and the first heating coil (21), the third heating coil (23) and the fourth heating coil (24) are all communicated with the circulating pump (1) through the circulating pump (4);
the first heating coil (21), the second heating coil (22), the third heating coil (23) and the fourth heating coil (24) are arranged in an arch shape, the hot oil flow directions in the first heating coil (21) and the second heating coil (22) are opposite, and the hot oil flow directions in the third heating coil (23) and the fourth heating coil (24) are opposite;
the inside of the coil pipes (2) is divided into two channels by the partition plates (25), the ports of the two channels are respectively and hermetically connected with a connecting pipe (26), and the two channels are respectively communicated with the heating device (1) through the connecting pipes (26) to form two circulating channels with opposite heat medium flow directions;
the height of the tower-shaped fixing frame (3) is 2/5-4/5 of the height of the warehouse.
2. A liquid asphalt cargo space heating system according to claim 1, wherein said first heating coil (21) is 120-160mm from the ground and said second heating coil (22) is 120-160mm from the first heating coil (21).
3. The heating system of the liquid asphalt cargo hold according to claim 1, wherein the heating device (1) is provided with a liquid outlet end and a liquid inlet end, the liquid outlet end of the heating device (1) is connected with a distributor (5), the liquid inlet end of the heating device (1) is connected with a mixing conveyer (6), a plurality of liquid outlets arranged on the distributor (5) are respectively communicated with the liquid inlet ends of a plurality of heating coils (2) through a first control valve, the liquid outlet ends of the heating coils (2) are respectively communicated with the mixing conveyer (6) through a second control valve, two circulating pumps (4) are arranged between the mixing conveyer (6) and the heating device (1), and the two circulating pumps (4) are connected in parallel.
4. A liquid asphalt cargo hold heating system according to claim 1, wherein said heating means (1) is a hot oil heater.
5. A liquid asphalt cargo hold heating system according to claim 1, wherein the upper end of the heating device (1) is further connected with an expansion heating medium tank (7).
6. A method of heating a liquid asphalt cargo compartment heating system according to any one of claims 1-5, comprising the steps of:
s1, calculating heat required by heating according to the heating temperature required by liquid asphalt and the bilge, calculating the total length of a heating coil (2) according to the heat conductivity coefficient of the heating coil, and equally dividing the heating coil (2) into at least 4 groups;
s2, paving an upper layer of heating coils (2) and a lower layer of heating coils (2) on the bottom of the warehouse, wherein at least one group of heating coils (2) is arranged on each layer;
s3, fixing a tower-shaped fixing frame (3) at the center of the bottom of the warehouse, and arranging at least one group of heating coils (2) on the periphery and the inner wall of the tower-shaped fixing frame (3);
s4, each heating coil (2) is communicated with the heating device (1) through a circulating pump (4) to form a circulating loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487102.5A CN109606604B (en) | 2018-12-06 | 2018-12-06 | Liquid asphalt cargo hold heating system and heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487102.5A CN109606604B (en) | 2018-12-06 | 2018-12-06 | Liquid asphalt cargo hold heating system and heating method |
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| Publication Number | Publication Date |
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| CN109606604A CN109606604A (en) | 2019-04-12 |
| CN109606604B true CN109606604B (en) | 2024-04-12 |
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| CN201811487102.5A Active CN109606604B (en) | 2018-12-06 | 2018-12-06 | Liquid asphalt cargo hold heating system and heating method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113247204B (en) * | 2021-06-30 | 2022-03-08 | 招商局金陵鼎衡船舶(扬州)有限公司 | Cargo compartment outfitting construction method and heating coil stacking tool applying same |
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| CN109606604A (en) | 2019-04-12 |
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