EP3216906B1

EP3216906B1 - Energy-saving dyeing machine

Info

Publication number: EP3216906B1
Application number: EP16159750.5A
Authority: EP
Inventors: Chiu-Huei Liao
Original assignee: Tai Su Energy Technology Co Ltd
Current assignee: Tai Su Energy Technology Co Ltd
Priority date: 2016-03-10
Filing date: 2016-03-10
Publication date: 2019-02-27
Anticipated expiration: 2036-03-10
Also published as: EP3216906A1

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention:

The present invention relates to a dyeing machine, particularly to one that has a direct-heating heat exchanger to heat up liquid dyes and further heats up the liquid dyes in a body thereof by the heated exhaust gas in order to make a better use of the heat energy and reduce unnecessary wastes.

2. Description of the Related Art

A conventional dyeing machine has structures as shown in FIG. 1, mainly including a body 110, a liquid dye supply device 120, and a guiding tube 140. The body has a head portion 111 with a rolling reel 113 and a nozzle 114, and a storage tank 112. The liquid dye supply device 120 sucks in liquid dyes by a main pump 121 and a dosing pump 123 from a dosing tank 122 to flow through a heat exchanger 130 via a linking tube 124 to the nozzle 114. The guiding tube 140 links the nozzle 114 to the rear of the body 110, forming a routine for a piece of fabric 141 to go through a circulation dipping.
Furthermore, the heat exchanger 130 has an inlet for steams 131, an entry for cooled water 132, an exit for cooled water 133, an outlet for sewage water 134, and a manual discharging outlet 135, so as to conduct heat exchange by steams 131 produced by a boiler with the liquid dyes. The boiler has fuels to produce heat and steams to be delivered to the heat exchanger 130 for heat exchange; in the process, the heat energy produced by the fuels have to go through several converting and delivery process before conducting heat exchanges, among which there are unnecessary wastes of heat energies; for example, the heat energies lost in conversion and steams loss in the delivery process.
In order to improve the unnecessary wastes in heat energies in the dyeing process, a direct-heating heat exchanger is developed. It has fuels to produce heated gas and directly heats up liquid dyes thereby, saving the delivery and conversion process in the conventional dyeing machine. However, after conducting the direct heating, the exhaust gas is discharged immediately, which becomes another waste in the dyeing process and therefore leaves some room for improvements in the field.
For instance, Japanese patent No. 2000192365A discloses a dyeing machine according to the preamble of claim 1, heating up the liquid dyes by liquefied natural gas to reduce loss of heat energy and fuel costs with a simple structure; and a cooling device is formed by having cooled water surrounding a plurality of liquid supplying pipes. To heat up the liquid dye, a plurality of heating pipes of the dyeing machine is arranged in rows in a shape of a coil within a case of the dyeing machine. However, after the heat exchanging process, the gas left in the heating pipes is discharged directly and the heat energy cannot be completely utilized.
A dyeing apparatus is disclosed in European patent No. 0436874 for dyeing fabrics. The dyeing apparatus mainly has a body for circulation of dyeing liquid and the fabrics, a heating device for heating up the dyeing liquid by gas. However, the dyeing apparatus does not make further use of the gas after combustion; instead, it has the gas discharged directly. Therefore, such device can cause energy loss when there is more energy for reuse.
Chinese patent No. 104711804 discloses an air-cooled heat exchanger for dyeing machines. The air-cooled heat exchanger device holds control of heat by heat exchanging process between steams, cool air, and water, in order to heat up dyeing liquid inside a dyeing machine. However, such device has to go through heat exchanging process between steams, cooled air, and water instead of directly sending heated gas to heat up the dyeing liquids. In view of energy-saving, there is still room for improvements.

SUMMARY OF THE INVENTION

It is a primary object of the present invention to provide an energy-saving dyeing machine that has a direct-heating heat exchanger to heat up liquid dyes to reduce unnecessary energy wastes in the prior art.
Another object of the present invention is to provide an energy-saving dyeing machine that reapplies the heated exhaust gas to make a better use of the hear energy in the heating process.
In order to achieve the objects above, the present invention mainly comprises a body, a liquid dyes supply device, a liquid dyes heating device, and a cooling unit according to the annexed Claim 1.
Whereby when heating up liquid dyes, the cooled water entry valve and the cooled water exit valve are closed and liquid dyes enter the direct-heating heat exchanger from the liquid dyes supply device via the supply tube for heating, then flow through the series connected pipeline and the cooling unit, with no cooled water entering the cooling unit, and flow into the body via the entering tube; while cooling down liquid dyes, the cooled water entry valve and the cooled water exit valve are opened and the direct-heating heat exchanger is switched off, and liquid dyes enter the direct-heating heat exchanger from the liquid dyes supply device via the supply tube, then flow through the series connected pipeline into the heat exchanger for cooling, and flow into the body via the entering tube.
With structures disclosed above, the body includes an outer wall to define a surrounding space for heating. The surrounding space has an intake port arranged aside and an exit port arranged at the other side, and the exhaust gas outlet of the direct-heating heat exchanger has an exhaust gas duct connecting the intake port of the surrounding space thereby the heated exhaust gas is able to enter the surrounding space to heat up liquid dyes in the body for a second time, making a better use of the heat energy. The body further includes a head portion with a rolling reel and a nozzle connecting to the entering port for liquid dyes, a storage tank, and a guiding tube linking the nozzle to a rear section of the body for circulation dipping.
As stated above, the present invention has the direct-heating heat exchanger to heat up liquid dyes by the heated gas, saving several heating procedures and unnecessary energy wastes in a conventional dyeing machine. In addition, the present invention further uses the heated exhaust gas reheat the liquid dyes in the body to make a better use of the heat energy.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram illustrating structures of a conventional dyeing machine;
FIG. 2 is a schematic diagram illustrating structures of the present invention as a horizontal dyeing machine;
FIG. 3 is a sectional view of a body of the horizontal dyeing machine;
FIG. 4 is a schematic diagram illustrating structures of a direct-heating heat exchanger of the present invention;
FIG. 5 is a schematic diagram illustrating the horizontal dyeing machine heating up liquid dyes; and
FIG. 6 is a schematic diagram illustrating the horizontal dyeing machine cooling down liquid dyes.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 2, in an applicable embodiment, a horizontal energy-saving dyeing machine 100 mainly includes a body 10, a guiding tube 40, a liquid dyes supply device 20, a liquid dyes heating device 30, and a cooling unit 70. In this embodiment, the body 10 is horizontally arranged but it is not limited to such application. It can be vertically arranged as well.
The body 10 includes a head portion 11, a storage tank 12, an entering port for liquid dyes 41 arranged above, connecting to an entering tube 42, and an exiting port for liquid dyes 43 arranged below, connecting to an exiting tube 24. The head portion 11 further includes a rolling reel 13 and a nozzle 14 connecting to the entering port for liquid dyes 41. The guiding tube 40 links the nozzle 14 to a rear section 19 of the body 10 for circulation dipping.
The features of the present invention are described as following. The body 10 further includes an outer wall 15 to define a surrounding space 16 for heating, and the surrounding space 16 has an intake port 17 arranged aside and an exit port 18 arranged at the other side. The liquid dyes supply device 20 is arranged outside the body 10, including a pump 21 for pressuring liquid dyes L, an outlet 22 connecting to a supply tube 25, and an inlet 23 connecting to the exiting tube 24. The liquid dyes heating device 30 is arranged outside the body 10, including a direct-heating heat exchanger 31 to heat up liquid dyes L, and an exhaust gas outlet 34 connecting to an exhaust gas duct 36 for discharging heated exhaust gas G. The direct-heating heat exchanger 31 includes a first entry 32 connecting to the supply tube 25 and a first exit 33 connecting to a series connected pipeline 35 for discharging heated liquid dyes L. The exhaust gas duct 36 further connects to the intake port 17 of the surrounding space 16, thereby the heated exhaust gas G is able to enter the surrounding space 16 to heat up the liquid dyes L in the body 10.
The cooling unit 70 is arranged outside the body 10 near the liquid dyes heating device 30, including a heat exchanger 71 to cool down the liquid dyes L. The heat exchanger 71 has an entering port 72 for cooled water connecting to a cooled water entry valve 61 and a cooled water supply tube 73, an exiting port 74 for cooled water connecting to a cooled water exit valve 62 for discharging cooled water W, a second entry 75 connecting to the series connected pipeline 35, and a second exit 76 connecting to the entering tube 42.
FIG. 3 is a sectional view of the body 10. The storage tank 12 is arranged at a lower position thereof for dipping a piece of fabric C. After being discharged from the direct-heating heat exchanger 31 via the exhaust gas duct 36, the heated exhaust gas G enters the surrounding space 16 via the intake port 17 and reheats the liquid dyes L by another heat exchange process before being discharged from the exit port 18.
Further referring to FIG. 4, the direct-heating heat exchanger 31 includes an inner room 53, an intermediate room 52, an outer room 51, and a heating unit 54. The inner room 53 has a heating room 57 therein and an inner entry 531 arranged aside. The intermediate room 52 is surrounding the inner room 53, defining a heat exchanging room 56 connecting the first entry 32 and the first exit 33. The outer room 51 is surrounding the intermediate room 52, defining a discharging room 55 connecting to the exhaust gas outlet 34. The discharging room further includes a plurality of connecting holes 532 connecting through the heating room 57 and an outer entry 512 arranged corresponding to the inner entry 531. The heating unit 54 is arranged at the outer entry 512 to send fuels into the heating room 57.
FIG. 5 illustrates the operation of the present invention heating up liquid dyes L. When conducting heating, the direct-heating heat exchanger 31 and the heating unit 54 are activated to send the fuels into the heating room 57 to produce heat energy, and the cooled water entry valve 61 and the cooled water exit valve 62 are closed. Then, liquid dyes L enter the direct-heating heat exchanger 31 from the liquid dye supply device 20 via the supply tube 25 for heating. After the heating, liquid dyes L flow to the cooling unit 70 via the series connected pipeline 35 and then into the body 10 via the entering tube for liquid dyes 42 and the nozzle 14 to arrive the storage tank 12. The heated exhaust gas G after heat exchanging process with liquid dyes L in the direct-heating heat exchanger 31 then enters the surrounding space 16 via the exhaust gas duct 36 to reheat the liquid dyes L in the body 10.
FIG. 6 illustrates the operation of the present invention cooling down liquid dyes L. When conducting cooling, the heat exchanger 71 of the cooling unit 70 is activated, and the cooled water entry valve 61 and cooled water exit valve 62 are opened for cooled water W to enter the heat exchanger 71 from the cooled water supply tube 73 and to be discharged through the exiting port (74). Then the heating unit 54 is deactivated and liquid dyes L flow through the liquid dye supply device 20 via the supply tube 25 and the liquid dyes heating device 30 to enter the heat exchanger 71 via the series connected pipeline 35 for cooling. After cooling, liquid dyes L flow into the body 10 via the nozzle 14 to arrive the storage tank 12.
In short, the present invention has the direct-heating heat exchanger 31 to heat up liquid dyes L by the heated exhaust gas G, saving several heating procedures and unnecessary energy wastes in a conventional dyeing machine. In addition, the present invention further has the surrounding space 16 formed between the body 10 and the outer wall 15 to reuse the heated exhaust gas G for heating the liquid dyes L in the body 10 for a second time to make a better use of the heat energy.
Although particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except by the appended claims.

Claims

An energy-saving dyeing machine, comprising:
a body (10) including a storage tank (12) and a nozzle (14) connecting to an entering port (41) for liquid dyes arranged aside, connecting to an entering tube (42), and an exiting port (43) for liquid dyes arranged at the other side, connecting to an exiting tube (24) for liquid dyes circulation;

a liquid dyes supply device (20) arranged outside said body (10), including a pump (21) for pressuring, an outlet (22) connecting to a supply tube (25), and an inlet (23) connecting to said exiting tube (24);

a liquid dyes heating device (30) arranged outside said body (10) near the liquid dyes supply device (20), including a direct-heating heat exchanger (31) to heat up liquid dyes (L), said direct-heating heat exchanger (31) including an inner room (53) having a heating room (57) therein and an inner entry (531) arranged aside, and a heating unit (54) arranged at an outer entry (512) arranged corresponding to said inner entry (531) to send in fuels into the heating room (57); and

a cooling unit (70) arranged outside said body (10) near said liquid dyes heating device (30), including a heat exchanger (71) to cool down liquid dyes (L), said heat exchanger (71) having an entering port (72) for cooled water connecting to a cooled water entry valve (61) and a cooled water supply tube (73), an exiting port (74) for cooled water connecting to a cooled water exit valve (62) for discharging cooled water (W), a second entry (75) connecting to a series connected pipeline (35), and a second exit (76) connecting to said entering tube (42);

characterized in that:
said direct-heating heat exchanger (31) includes an intermediate room (52) surrounding said inner room (53), defining a heat exchanging room (56) with a first entry (32) connecting to said supply tube (25) and a first exit (33) connecting to said series connected pipeline (35) for discharging heated liquid dyes (L), an outer room (51) surrounding said intermediate room (52), defining a discharging room (55) with a exhaust gas outlet (34) and including a plurality of connecting holes (532) connecting through said heating room (57)

whereby said body (10) includes an outer wall (15) to define a surrounding space (16) for heating, said surrounding space (16) having an intake port (17) arranged aside and an exit port (18) arranged at the other side; and the exhaust gas outlet (34) of the direct-heating heat exchanger (31) has an exhaust gas duct (36) connecting the intake port (17) of the surrounding space (16) thereby the heated exhaust gas (G) is able to enter the surrounding space (16) to heat up liquid dyes (L) in the body (10) for a second time;

whereby when conducting heating, the direct-heating heat exchanger (31) and the heating unit (54) are activated to send fuels into the heating room (57) to produce heat energy, and the cooled water entry valve (61) and the cooled water exit valve (62) are closed; then liquid dyes (L) enter the direct-heating heat exchanger (31) from the liquid dye supply device (20) via the supply tube (25) for heating; after heating, liquid dyes (L) flow to the cooling unit (70) via the series connected pipeline (35) and then into the body (10) via the entering tube (42) to be sent into the storage tank (12) via the nozzle (14); the heated exhaust gas (G) left in the direct-heating heat exchanger (31) after the heat exchanging with liquid dyes (L) then enters the surrounding space (16) via the exhaust gas duct (36) to reheat the liquid dyes (L) in the body (10); and

when conducting cooling, the heat exchanger (71) of the cooling unit (70) is activated, and the cooled water entry valve (61) and the cooled water exit valve (62) are opened for cooled water (W) to enter the heat exchanger (71) from the cooled water supply tube (73) and to be discharged through the exiting port (74); then the heating unit (54) is deactivated and liquid dyes (L) flow from the liquid dye supply device (20) via the supply tube (25) and the liquid dyes heating device (30) to enter the heat exchanger (71) via the series connected pipeline (35) for cooling; after cooling, liquid dyes (L) flow into the body (10) via the entering tube (42) to be sent into the storage tank (12) via the nozzle (14).
The energy-saving dyeing machine as claimed in claim 1, wherein the body (10) further includes a head portion (11) with a rolling reel (13) and a guiding tube (40) linking the nozzle (14) to a rear section (19) of the body (10) for circulation dipping.