Weaving process of diaphragm cloth for hydrogen production

Abstract

The invention discloses a weaving process of diaphragm cloth for hydrogen production. The weaving process comprises the following steps: S1, preparing fibers; step S2, cotton carding; s3, drawing is carried out; step S4, roving; step S5, spinning; step S6, self-complexing; step S7, two-for-one twisting; step S8, weaving; step S9, carrying out post-treatment; according to the weaving process of the diaphragm cloth for hydrogen production, the diaphragm cloth with high ionic conductivity, good mechanical strength and wear resistance and excellent air tightness is prepared by optimizing the fiber specification and the spinning step, the process is simple, easy to operate and suitable for large-scale industrial production, and a high-quality diaphragm material is provided for an alkaline electrolysis water hydrogen production system.

Description

Technical Field

[0001] The invention belongs to the field of textile technology, and in particular relates to a weaving process of a diaphragm cloth for hydrogen production. Background Art

[0002] In the process of hydrogen production by alkaline water electrolysis, diaphragm cloth plays a vital role. It not only allows the ions in the electrolyte to move freely, but also effectively isolates the hydrogen and oxygen produced by the cathode and anode. Although traditional diaphragm materials such as asbestos have excellent hydrophilicity, they have been eliminated due to their carcinogenicity and swelling in alkaline electrolytes. At present, polyphenylene sulfide (PPS) diaphragms have become the mainstream due to their good alkali resistance and high temperature stability, but their hydrophilicity is weak, which affects the electrolysis efficiency. Therefore, it is of great significance to develop a new weaving process for diaphragm cloth for hydrogen production to improve the hydrophilicity, mechanical strength and airtightness of the diaphragm.

[0003] Based on this, a weaving process for diaphragm cloth for hydrogen production was designed. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a weaving process of a diaphragm cloth for hydrogen production, which effectively solves the problems raised in the above background.

[0005] To achieve the above object, the present invention provides the following technical solution: a weaving process for a diaphragm cloth for hydrogen production, comprising the following steps:

[0006] Step S1, fiber preparation: PPS fiber with a specification of 1.56 dtex × 51 mm is selected as the raw material; PPS fiber is suitable for hydrogen production membrane due to its excellent alkali resistance and high temperature stability;

[0007] Step S2, carding: feeding the PPS fibers into a carding machine for carding, so that the fibers are arranged in parallel to form a uniform fiber web;

[0008] Step S3, drawing: feeding the fiber web obtained by carding into a drawing frame for drawing, wherein the drawing further improves the uniformity and parallelism of the fibers;

[0009] Step S4, roving: the fiber strips obtained by drawing are fed into a roving frame for roving, through which the fiber strips are twisted into roving strips in preparation for subsequent spinning;

[0010] Step S5, spinning: the roving strips are fed into a spinning frame for spinning. Through the spinning, the roving strips are further twisted into spun yarn. At the same time, negative pressure technology is used to make the fibers more closely arranged, thereby improving the strength and uniformity of the yarn;

[0011] Step S6, self-winding: feeding the spun yarn into a self-winding machine for winding, and winding the spun yarn into a bobbin through self-winding to facilitate subsequent weaving;

[0012] Step S7, two-for-one twisting: feeding the self-winding package yarn into a two-for-one twister for two-for-one twisting, thereby further increasing the twist of the yarn and improving the strength and wear resistance of the yarn;

[0013] Step S8, weaving: feeding the yarn obtained by twisting into a loom for weaving, and weaving the yarn into a diaphragm cloth;

[0014] Step S9, post-processing: the woven diaphragm cloth is sent to the post-processing equipment for processing. The post-processing includes heat treatment and sulfonation treatment steps. The heat treatment temperature is 180-220 ° C and the time is 30-60 minutes to form a cross-linked structure of the diaphragm cloth to improve its stability and alkali resistance. The sulfonation treatment uses a sulfuric acid solution with a concentration of 10%-20% for a treatment time of 10-30 minutes to improve the hydrophilicity of the diaphragm cloth and improve its compatibility with the electrolyte.

[0015] Preferably, in step S2, the quantitative setting of the carding machine is 23g / 5m, the five-point gauges are 8mm, 7mm, 7mm, 7mm, and 8mm respectively, the licker-in speed is 800rpm, the cylinder speed is 430rpm, the cover speed is 150mm / min, and the strip output speed is 100m / min.

[0016] Preferably, in step S3, the basis weight of the drawing frame is set to 19 g / 5 m, the roller gauge is 23 mm × 30 mm, and the delivery speed is 280 m / min.

[0017] Preferably, in step S4, the spindle speed of the roving frame is 800 rpm, the basis weight is 4.7 g / 10 m, and the twist is 27 T / m.

[0018] Preferably, in step S5, the spinning frame adopts ultra-low twist negative pressure spinning technology, the roller speed is 228 rpm, and the twist is 320 T / m.

[0019] Preferably, in step S6, the speed of the self-winding machine is 800 m / min, and the electric clearing threshold is set to N:300, S180, 1.8, L 30, 25, T-30, 40.

[0020] Preferably, in step S7, the doubling speed of the two-for-one twister is 500 m / min, the two-for-one twisting speed is 4500 rpm, and the twist is 120 T / m.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The weaving process of the hydrogen production diaphragm cloth of the present invention optimizes the fiber specifications and spinning steps to produce a diaphragm cloth with high ion conductivity, good mechanical strength and wear resistance, and excellent air tightness. The process is simple and easy to operate, suitable for large-scale industrial production, and provides a high-quality diaphragm material for alkaline water electrolysis hydrogen production systems.

[0023] 2. Through twisting and post-processing steps, the strength and hydrophilicity of the diaphragm cloth are further improved, making it more suitable for use in alkaline water electrolysis hydrogen production systems. DETAILED DESCRIPTION

[0024] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] The present invention provides a weaving process for a diaphragm cloth for hydrogen production, comprising the following steps:

[0026] Step S1, fiber preparation: PPS fiber with a specification of 1.56 dtex × 51 mm is selected as the raw material; PPS fiber is suitable for hydrogen production membrane due to its excellent alkali resistance and high temperature stability;

[0027] Step S2, carding: feeding the PPS fibers into a carding machine for carding, so that the fibers are arranged in parallel to form a uniform fiber web;

[0028] Step S3, drawing: feeding the fiber web obtained by carding into a drawing frame for drawing, wherein the drawing further improves the uniformity and parallelism of the fibers;

[0029] Step S4, roving: the fiber strips obtained by drawing are fed into a roving frame for roving, through which the fiber strips are twisted into roving strips in preparation for subsequent spinning;

[0030] Step S5, spinning: the roving strips are fed into a spinning frame for spinning. Through the spinning, the roving strips are further twisted into spun yarn. At the same time, negative pressure technology is used to make the fibers more closely arranged, thereby improving the strength and uniformity of the yarn;

[0031] Step S6, self-winding: feeding the spun yarn into a self-winding machine for winding, and winding the spun yarn into a bobbin through self-winding to facilitate subsequent weaving;

[0032] Step S7, two-for-one twisting: feeding the self-winding package yarn into a two-for-one twister for two-for-one twisting, thereby further increasing the twist of the yarn and improving the strength and wear resistance of the yarn;

[0033] Step S8, weaving: feeding the yarn obtained by twisting into a loom for weaving, and weaving the yarn into a diaphragm cloth;

[0034] Step S9, post-processing: the woven diaphragm cloth is sent to the post-processing equipment for processing. The post-processing includes heat treatment and sulfonation treatment steps. The heat treatment temperature is 180-220 ° C and the time is 30-60 minutes to form a cross-linked structure of the diaphragm cloth to improve its stability and alkali resistance. The sulfonation treatment uses a sulfuric acid solution with a concentration of 10%-20% for a treatment time of 10-30 minutes to improve the hydrophilicity of the diaphragm cloth and improve its compatibility with the electrolyte.

[0035] In step S2 of this embodiment, the quantitative setting of the carding machine is 23g / 5m, the five-point spacing is 8mm, 7mm, 7mm, 7mm, and 8mm respectively, the licker-in speed is 800rpm, the cylinder speed is 430rpm, the cover speed is 150mm / min, and the strip output speed is 100m / min.

[0036] In step S3 of this embodiment, the basis weight of the drawing frame is set to 19 g / 5 m, the roller spacing is 23 mm×30 mm, and the delivery speed is 280 m / min.

[0037] In step S4 of this embodiment, the spindle speed of the roving frame is 800 rpm, the basis weight is 4.7 g / 10 m, and the twist is 27 T / m.

[0038] In step S5 of this embodiment, the spinning frame adopts ultra-low twist negative pressure spinning technology, the roller speed is 228 rpm, and the twist is 320 T / m.

[0039] In step S6 of this embodiment, the speed of the self-winding machine is 800 m / min, and the electric clearing threshold is set to N:300, S180, 1.8, L 30, 25, T-30, 40.

[0040] In step S7 of this embodiment, the doubling speed of the two-for-one twister is 500 m / min, the two-for-one twisting speed is 4500 rpm, and the twist is 120 T / m.

[0041] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A weaving process for a diaphragm cloth for hydrogen production, characterized in that: The following steps are involved: Step S1, fiber preparation: PPS fiber with a specification of 1.56 dtex×51 mm is selected as raw material; PPS fiber is suitable for hydrogen production membranes due to its excellent alkali resistance and high temperature stability; Step S2, carding: feeding the PPS fibers into a carding machine for carding, and through the carding, the fibers are arranged in parallel to form a uniform fiber web; Step S3, drawing: feeding the fiber web obtained by carding into a drawing frame for drawing, and drawing further improves the uniformity and parallelism of the fibers; Step S4, roving: the fiber strips obtained by drawing are sent to the roving frame for roving, and the fiber strips are twisted into roving strips through the roving to prepare for subsequent spun yarn; Step S5, spinning: feeding the roving strips into the spinning frame for spinning, through which the roving strips are further twisted into spun yarns, and negative pressure technology is used to arrange the fibers more closely, thereby improving the strength and uniformity of the yarns; Step S6, self-winding: feeding the spun yarn into a self-winding machine for winding, and winding the spun yarn into a bobbin through self-winding, so as to facilitate subsequent weaving; Step S7, two-for-one twisting: sending the self-winding package yarn into a two-for-one twisting machine for two-for-one twisting, and further increasing the twist of the yarn through two-for-one twisting, thereby improving the strength and wear resistance of the yarn; Step S8, weaving: feeding the yarn obtained by twisting into a loom for weaving, and weaving the yarn into a diaphragm cloth; Step S9, post-treatment: the woven diaphragm cloth is sent to a post-treatment device for treatment. The post-treatment includes heat treatment and sulfonation treatment steps. The heat treatment temperature is 180-220°C and the time is 30-60 minutes to form a cross-linked structure of the diaphragm cloth to improve its stability and alkali resistance. The sulfonation treatment uses a sulfuric acid solution with a concentration of 10%-20% for a treatment time of 10-30 minutes to improve the hydrophilicity of the diaphragm cloth and improve its compatibility with the electrolyte.

2. A weaving process for a diaphragm cloth for hydrogen production according to claim 1, characterized in that: In step S2, the carding machine is set to a quantitative setting of 23g / 5m, the five-point gauges are 8mm, 7mm, 7mm, 7mm, and 8mm respectively, the licker-in roller speed is 800rpm, the cylinder speed is 430rpm, the cover speed is 150mm / min, and the sliver output speed is 100m / min.

3. The weaving process of a diaphragm cloth for hydrogen production according to claim 1, characterized in that: In step S3, the basis weight of the drawing frame is set to 19 g / 5 m, the roller spacing is 23 mm×30 mm, and the delivery speed is 280 m / min.

4. The weaving process of a diaphragm cloth for hydrogen production according to claim 1, characterized in that: In step S4, the spindle speed of the roving frame is 800 rpm, the basis weight is 4.7 g / 10 m, and the twist is 27 T / m.

5. The weaving process of a diaphragm cloth for hydrogen production according to claim 1, characterized in that: In the step S5, the spinning frame adopts the ultra-low twist negative pressure spinning technology, the roller speed is 228 rpm, and the twist is 320 T / m.

6. The weaving process of a diaphragm cloth for hydrogen production according to claim 1, characterized in that: In step S6, the speed of the self-winding machine is 800 m / min, and the electric clearing threshold is set to N:300, S180,1.8, L 30,25, T-30,40.

7. A weaving process for a diaphragm cloth for hydrogen production according to claim 1, characterized in that: In step S7, the doubling speed of the two-for-one twister is 500 m / min, the two-for-one twisting speed is 4500 rpm, and the twist is 120 T / m.