Waste gas treatment and heat energy recovery integrated circulation process method for tentering setting machine

Abstract

The invention relates to an integrated circulating process method for waste gas treatment and heat energy recovery of a tentering setting machine. The integrated circulating process method comprises the following steps: S1, waste gas discharged by a drying oven of the tentering setting machine enters a first filter through a pipeline to be filtered; s2, the waste gas filtered by the first filter in the step S1 enters a heater through a pipeline to be heated; s3, the waste gas heated by the heater in the step S2 enters a catalytic device through a pipeline and is subjected to a catalytic reaction with a catalyst in the catalytic device; and S4, returning the waste gas subjected to the catalytic reaction of the catalyst in the step S3 to the drying oven of the tentering setting machine through a pipeline, and recycling the heat energy. The device has the advantages that the waste gas is filtered, heated by the heater, catalyzed and filtered again, and heat energy is recycled, so that the process steps are reduced, and the treated gas is returned to the tentering setting machine oven again for heat energy recycling.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment of stenter machines, and more specifically, to a waste gas treatment and heat energy recovery integrated circulation process method for stenter machines. Background Art

[0002] The waste gas discharged by stenter machines not only contains a large amount of soot, but also contains various components such as polystyrene organic matter, printing and dyeing auxiliaries, oil, etc. Generally, each stenter machine discharges 150 - 250 mg / m 3 of particulate matter and 40 - 80 mg / m 3 of oil fume.

[0003] The waste gas discharged by stenter machines belongs to industrial oil fume, which is a general term for the grease, organic matter and their thermal decomposition or cracking products volatilized during the high - temperature setting process of the cloth by the stenter machine. The oil fume discharged by the stenter machine mainly comes from the chain oil of the stenter machine in the cloth during the high - temperature setting process, mainly including surface - active monomers such as chemical fiber oil agent smoothing agent, antistatic agent, phosphate ester, fatty acid ester, sulfate ester, polyether of emulsifier, and lubricant, etc.

[0004] The waste gas of stenter machines is a mixed fluid containing gas - liquid - solid three - phase pollutants, with characteristics such as "high temperature, high humidity, containing oil and complex composition", and its harm is very serious. The organic vapor and oil mist in the waste gas are important sources of substances that damage the ozone layer in the atmosphere and PM2.5, and are also the source of photochemical smog in the air, affecting environmental air quality and damaging the earth's ecology. The waste gas contains nauseating odors and annoying oily particles, affecting the quality of life of residents; the waste gas contains a variety of persistent pollutants, which are likely to cause respiratory diseases in the human body, may affect human immunity, cause greater harm to the reproductive system, and may even cause cancer. The oil fume particles adhere through nucleation in pipelines and equipment, not only causing blockages and failures in pipelines and equipment, but also having the property of being flammable and explosive, endangering the safe and stable production of enterprises.

[0005] Currently, the existing technologies for treating the waste gas of stenter machines first perform spray cooling. However, waste oil and waste water are generated during the spray cooling process, and at the same time, the waste oil and waste water need to be removed again, which is time - consuming and laborious; on the other hand, the existing technologies do not recover a large amount of heat energy in the waste gas of stenter machines, resulting in energy waste.

[0006] The foregoing description is for the purpose of providing general background information and does not necessarily constitute prior art. Summary of the Invention

[0007] The purpose of the present invention is to provide an integrated circulation process method for waste gas treatment and heat energy recovery of a stentering machine. The process method has simple steps, solves the problem of waste gas pollution while improving energy utilization efficiency, and is energy-saving and environmentally friendly.

[0008] The present invention provides an integrated circulation process method for waste gas treatment and heat energy recovery of a stentering machine. The process method includes the following steps:

[0009] S1: The waste gas discharged from the drying oven of the stentering machine enters the first filter through a pipeline for filtration.

[0010] S2: The waste gas filtered by the first filter in step S1 enters a heater through a pipeline for heating and temperature rise.

[0011] S3: The waste gas heated and temperature - raised by the heater in step S2 enters a catalytic device through a pipeline and undergoes a catalytic reaction with the catalyst in the catalytic device.

[0012] S4: The waste gas after the catalytic reaction with the catalyst in step S3 returns to the drying oven of the stentering machine through a pipeline for heat energy recovery and utilization.

[0013] Further, a second filter is installed on the pipeline between the catalytic device and the drying oven of the stentering machine. The waste gas after the catalytic reaction with the catalyst in step S3 enters the second filter through a pipeline for re - filtration.

[0014] Further, a variable - speed blower is installed on the pipeline between the drying oven of the stentering machine and the first filter.

[0015] Further, a variable - speed blower is installed on the pipeline between the drying oven of the stentering machine and the second filter.

[0016] Further, step S4 further includes:

[0017] S41: For the part of the waste gas that reaches the emission standard after the catalytic reaction with the catalyst, it is discharged through a chimney.

[0018] Further, step S1 further includes filtering the waste gas discharged from multiple drying ovens of the stentering machine through multiple pipelines into the first filter; step S4 further includes recycling the waste gas after the catalytic reaction with the catalyst in step S3 through multiple pipelines back to the corresponding multiple drying ovens of the stentering machine for heat energy recovery and utilization.

[0019] Further, the catalyst in step S3 includes noble metal catalysts, noble metal catalysts, non - noble metal oxide catalysts, composite catalysts, and auxiliary catalysts.

[0020] The one - cycle process method for waste gas treatment and heat energy recovery of the stenter in the present invention filters the waste gas, heats it with a heater, catalyzes it, filters it again, and recovers and utilizes the heat energy. Compared with the traditional process, it reduces process steps such as spray cooling, so there is no need to treat the waste oil and waste water generated during spray cooling again, reducing process steps and saving the cost of waste gas treatment. At the same time, the treated gas returns to the stenter oven again for heat energy recovery and utilization, improving the energy utilization rate and saving the textile production cost. The process method of the present invention has simple steps, solves the problem of waste gas pollution while improving the energy utilization rate, and is energy - saving and environment - friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic flow chart of the one - cycle process method for waste gas treatment and heat energy recovery of the stenter provided by the embodiment of the present invention.

[0022] Figure 2 is Figure 1 a schematic module diagram of the one - cycle process method for waste gas treatment and heat energy recovery of the stenter in

[0023] Figure 3 is Figure 1 a schematic module diagram of the one - cycle process method for waste gas treatment and heat energy recovery of the stenter with a pre - positioned fan in

[0024] Figure 4 is Figure 1 a schematic module diagram of the one - cycle process method for waste gas treatment and heat energy recovery of the stenter with a post - positioned fan in

[0025] Figure 5 is Figure 1 a schematic module diagram of the one - cycle process method for waste gas treatment and heat energy recovery of the stenter with multiple stenter ovens in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following combines the drawings and embodiments to further describe the detailed implementation manners of the present invention in detail. The following embodiments are used to illustrate the present invention, but not to limit the scope of the present invention.

[0027] The terms "first", "second", "third", "fourth", etc. in the description and claims of the present invention are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence.

[0028] Embodiment 1

[0029] Figure 1 It is a schematic flow chart of the one - cycle process method for waste gas treatment and heat energy recovery of the stenter provided by the embodiment of the present invention, Figure 2 is Figure 1Module schematic diagram of the integrated circulation process method for waste gas treatment and heat energy recovery of a medium-width stenter Figure 3 is Figure 1 Module schematic diagram with a blower placed in front for the integrated circulation process method for waste gas treatment and heat energy recovery of a medium-width stenter Figure 4 is Figure 1 Module schematic diagram with a blower placed behind for the integrated circulation process method for waste gas treatment and heat energy recovery of a medium-width stenter. Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 In the integrated circulation process method for waste gas treatment and heat energy recovery of a stenter provided by an embodiment of the present invention, the process method includes the following steps:

[0030] S1: The waste gas discharged from the oven of the stenter enters a first filter through a pipeline for filtration;

[0031] S2: The waste gas filtered by the first filter in step S1 enters a heater through a pipeline for heating and temperature rise;

[0032] S3: The waste gas heated and temperature-rise by the heater in step S2 enters a catalytic device through a pipeline and undergoes a catalytic reaction with the catalyst in the catalytic device;

[0033] S4: The waste gas after the catalytic reaction with the catalyst in step S3 returns to the oven of the stenter through a pipeline for heat energy recovery and utilization.

[0034] As Figure 2 shown, a second filter is installed on the pipeline between the catalytic device and the oven of the stenter in the present invention, and the waste gas after the catalytic reaction with the catalyst in step S3 enters the second filter through a pipeline for re-filtration.

[0035] It should be noted that in the integrated circulation process method for waste gas treatment and heat energy recovery of the stenter of the present invention, by filtering, heating, catalyzing, re-filtering and heat energy recovery and utilization of the waste gas, compared with the traditional process, process steps such as spray cooling are reduced, so there is no need to re-treat the waste oil and waste water generated during the spray cooling process, reducing the process steps and saving the waste gas treatment cost; at the same time, the treated gas returns to the oven of the stenter for heat energy recovery and utilization again, improving the energy utilization rate and saving the textile production cost; the process method of the present invention has simple steps, solves the waste gas pollution problem while improving the energy utilization rate, and is energy-saving and environment-friendly.

[0036] Further referring to Figure 3 , an adjustable-speed blower is installed on the pipeline between the oven of the stenter and the first filter in the present invention.

[0037] Further referring to Figure 4, an adjustable-speed fan is installed on the pipeline between the stenter oven and the second filter of the present invention.

[0038] It should be noted that the adjustable-speed fan is used to control the rate of the integrated cycle of waste gas treatment and heat energy recovery.

[0039] Further referring to Figure 3 , Figure 4 , step S4 of the present invention further includes:

[0040] S41: For the part of the waste gas that reaches the emission standard after the catalytic reaction by the catalyst, it is discharged through the chimney.

[0041] Figure 5 For Figure 1 It is a schematic diagram of modules of multiple stenter ovens in the integrated cycle process method for waste gas treatment and heat energy recovery of the stenter in the middle. Please refer to Figure 5 , step S1 of the present invention further includes filtering the waste gas discharged from multiple stenter ovens through multiple pipelines into a first filter; step S4 further includes recycling the waste gas that has undergone the catalytic reaction by the catalyst in step S3 back to the corresponding multiple stenter ovens through multiple pipelines for heat energy recovery.

[0042] Furthermore, the catalyst in step S3 of the present invention includes noble metal catalysts, noble metal catalysts, non-noble metal oxide catalysts, composite catalysts, and auxiliary catalysts.

[0043] Based on the above description, the advantages of the present invention are as follows:

[0044] 1. The integrated cycle process method for waste gas treatment and heat energy recovery of the stenter of the present invention reduces process steps such as spray cooling compared with traditional processes by filtering, heating, catalyzing, re-filtering, and heat energy recovery of the waste gas, thus eliminating the need for re-treatment of waste oil and waste water generated during the spray cooling process, reducing process steps, and saving waste gas treatment costs;

[0045] 2. The integrated cycle process method for waste gas treatment and heat energy recovery of the stenter of the present invention recycles the treated gas back to the stenter oven for heat energy recovery, improving energy utilization efficiency and saving textile production costs;

[0046] 3. The integrated cycle process method for waste gas treatment and heat energy recovery of the stenter of the present invention has simple steps, solves the waste gas pollution problem while improving energy utilization efficiency, and is energy-saving and environmentally friendly.

[0047] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims described above.

Claims

1. A stenter setting machine waste gas treatment and heat energy recovery integrated circulation process method, characterized in that: The process comprises the following steps: S1: the exhaust gas discharged from the oven of the stenter setting machine enters the first filter through the pipeline for filtration; S2: The exhaust gas filtered by the first filter in step S1 enters the heater through a pipeline to be heated; S3: the exhaust gas heated by the heater in step S2 enters the catalytic device through a pipeline and reacts with the catalyst in the catalytic device; S4: the waste gas after the catalytic reaction in step S3 is returned to the oven of the stenter setting machine through a pipeline for heat recovery and utilization.

2. The integrated cycle process method for exhaust gas treatment and heat recovery of a stenter setting machine according to claim 1 is characterized in that: A second filter is installed on the pipeline between the catalytic device and the oven of the stenter setting machine, and the waste gas after the catalytic reaction of the catalyst in step S3 enters the second filter through the pipeline for re-filtration.

3. The integrated cycle process method for exhaust gas treatment and heat recovery of a stenter setting machine according to claim 1 is characterized in that: A speed-adjustable fan is installed on the pipeline between the stenter oven and the first filter.

4. The integrated cycle process method for exhaust gas treatment and heat recovery of a stenter setting machine according to claim 1 is characterized in that: A speed-adjustable fan is installed on the pipeline between the stenter oven and the second filter.

5. The integrated cycle process method for exhaust gas treatment and heat recovery of a stenter setting machine according to claim 1 is characterized in that: The step S4 further comprises: S41: Part of the exhaust gas that meets the emission standards after catalytic reaction is discharged through the chimney.

6. The integrated cycle process method for treating exhaust gas and recovering heat energy from a stenter setting machine according to claim 1, characterized in that: The step S1 further includes filtering the exhaust gas discharged from the ovens of the multiple stenter setting machines through multiple pipes into a first filter; The step S4 also includes returning the waste gas that has undergone the catalytic reaction in step S3 to the corresponding multiple stenter setting machine ovens through multiple pipelines for heat recovery and utilization.

7. The integrated cycle process method for treating exhaust gas and recovering heat energy from a stenter setting machine according to claim 1 is characterized in that: The catalyst in step S3 includes precious metal catalysts, precious metal catalysts, non-precious metal oxide catalysts, composite catalysts and auxiliary catalysts.

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