Apparatus for utilizing waste salt charged with alternating current

Abstract

The application discloses a kind of waste salt utilization devices loaded alternating current, fine inorganic salt particles are encapsulated in the channel in the middle with upper and lower two semi-permeable membranes, and the channel is one or more parallelly arranged long and narrow channels.Each long and narrow channel is respectively provided with a flexible electrode at the left end and the right end, the inner end of the flexible electrode can contact the waste salt particles inside the channel, the outer end can be connected with a wire, and the two electrodes of the alternating current are connected;When the application is used, it is laid on the surface, and the channel is arranged in a substantially horizontal position.The application uses industrial waste salt as inorganic salt, saving manufacturing cost;Inorganic salt will not penetrate out to pollute the land or crops;The speed of melting snow or drying accumulated water is fast, and it can be reused.

Description

[0001] This case is a divisional application of patent application No. 202310425650X, entitled "A Waste Salt Utilization Device", filed on October 15, 2023. Technical Field

[0002] This invention relates to a technology for recycling waste salt. Background Technology

[0003] Commonly used technologies for the disposal of industrial waste salt in China include landfilling, high-temperature oxidation, and salt washing.

[0004] In foreign countries, industrial waste salt by-products are mostly treated to render them harmless before being dumped directly into the ocean. This method has significant limitations: firstly, the enterprises must be located near the sea or not far from the coast; and secondly, the waste salt by-products do not contain harmful organic or inorganic impurities.

[0005] Another method is to process waste salt into de-icing agents. Common de-icing agent raw materials are readily available and inexpensive (sodium chloride has a freezing point of -10℃ after dissolving in water, calcium chloride around -20℃, and acetic acid can reach around -30℃). De-icing agents melt snow on roads by lowering the melting temperature, facilitating road clearance, and their effect is obvious where they are applied. However, they are hazardous. Studies have found that de-icing agent residues can corrode road surfaces and car tires. Melted snow or ice turns into liquid and flows into drainage systems, farmland, etc., causing significant damage.

[0006] Society needs better ways to utilize waste salt resources. Summary of the Invention

[0007] Purpose of the invention:

[0008] This invention provides a waste salt utilization device that recycles and reuses waste inorganic salts to achieve excellent snow melting and dehumidification capabilities, without polluting the environment.

[0009] Technical solution:

[0010] This invention discloses a waste salt utilization device. Fine inorganic salt particles (sodium chloride, calcium chloride, magnesium chloride, potassium chloride, sodium sulfate, potassium sulfate, etc.) are encapsulated in a channel (a partial bulge between the two semi-permeable membranes) using two layers of semi-permeable membranes (water molecules can pass through, but electrolyte ions such as sodium and chloride ions cannot). The channel can be one or more parallel, elongated channels. Each channel has a flexible electrode at its left and right ends. The middle portion of the flexible electrode is encapsulated by the two semi-permeable membranes. The inner end of the flexible electrode can contact the waste salt particles inside the channel, and the outer end can be connected to a wire.

[0011] All external terminals of the left electrodes are connected to the same wire, and all external terminals of the right electrodes are connected to the same wire. The wires can be connected to terminals, or two wires can be connected to a plug. The terminals or plug can be connected to a power source (including DC power and AC power).

[0012] The aforementioned encapsulation involves heat sealing or adhesive bonding between two semi-permeable films, around the perimeter or around the channel.

[0013] In use, this invention is laid on a surface (ground, roof, or countertop), with the channels positioned in a basically horizontal position. This ensures that when the inorganic salts in the channels are dissolved by rainwater to form an electrolyte solution, the flexible electrodes at the left and right ends can be connected throughout the channel. When the surface has accumulated water or snow, or when rain or snow falls from above, the water will gradually permeate through the semi-permeable membrane (water uses the principle of osmotic pressure to flow from the external electrolyte-free solvent water into the internal high-concentration electrolyte solution) into the channels, causing the waste salt particles in the channels to dissolve and become a conductive electrolyte solution.

[0014] At this point, the plug is connected to the power source, and the two wires form a conductive circuit with the electrolyte solution. The electrolyte solution then becomes a heat-generating element, heating the surface. This heats up or evaporates the rain or snow above or below the surface, thus accelerating snow melting or water removal.

[0015] When the accumulated water or snow melts away, the water in the electrolyte solution is also mostly evaporated by the heat generated by its own electrical heating (at this time, the vapor pressure will be greater than the osmotic pressure mentioned above). The inorganic salt recrystallizes into non-conductive inorganic salt particles and no longer conducts electricity. At this time, even if the power is connected, a closed circuit cannot be formed, which can prevent the semi-permeable membrane from melting and being destroyed due to overheating.

[0016] When not needed for snow removal or water removal, this invention can be rolled up and stored, and then taken out and laid when required.

[0017] Alternatively, when not in use, one end of the channel can be raised and the other end lowered, so that the channel is not kept in a horizontal position. Even if the inorganic salts absorb rainwater, they cannot form an effective circuit and will not generate heat.

[0018] If manufactured and used on a large scale, this invention can use industrial waste salt as the inorganic salt, saving manufacturing and usage costs. It melts snow or dries water quickly, is easy to use, and can be reused. Moreover, the inorganic salt will not leach out and will not pollute the land or crops with rainwater.

[0019] The above-mentioned waste salt utilization device can be used in accordance with the following steps:

[0020] 1) Cover the above-mentioned waste salt utilization device onto the ground, roof or countertop that needs snow melting or drying, with each channel arranged in a basically horizontal position, and the wires connected to the power source (or connected to the power source through a switch) via terminals or plugs.

[0021] 2) After snowfall or rain, snowmelt or rainwater seeps into the channels, dissolving the inorganic salts within them to form electrolytes;

[0022] 3) The wires and electrolyte together form a connected circuit. When energized, the electrolyte heats up due to its own resistance.

[0023] 4) The electrolyte transfers heat to the snow or water in the outside through the double-layer semi-permeable membrane, causing the snow or water to heat up and melt quickly into water or evaporate directly.

[0024] 5) Most of the water flows into clean snowmelt or rainwater and then onto roads, green belts, or farmland.

[0025] 6) The waste salt utilization device that has absorbed a small amount of snow water relies on sun exposure to vaporize the liquid water into water vapor, which diffuses to the outside through a semi-permeable membrane. The inorganic salt in the channel recrystallizes into fine particles, thus restoring the waste salt utilization device, which can then be used for snow melting or drying operations repeatedly.

[0026] Beneficial effects:

[0027] This invention recycles and utilizes inorganic salts such as waste salt, with a wide range of raw material sources, reducing the cost of waste salt refining.

[0028] When this invention is used for snow melting, water removal, and dehumidification, most of the accumulated snow becomes clean and natural snow water that flows into roads, green belts, or farmland, and inorganic salts will not leak out and pollute the environment.

[0029] It melts snow and dries water quickly and efficiently with low energy consumption. It only requires a low voltage to make the electrolyte conduct heat and generate a temperature higher than 4-10°C. Moreover, the heated snow water becomes flowing rainwater, which can drive the surrounding snow to melt. It has high snow melting efficiency and low cost, and can be widely used for snow removal and dehumidification on the bottom, roof, and platform surfaces where a large number of vehicles and pedestrians walk.

[0030] Conducting electricity through an electrolyte solution reduces the use of conductive materials such as wires and saves on the consumption of conductive materials such as copper.

[0031] It can be reused multiple times and has low manufacturing and usage costs.

[0032] This invention can be used as a module, with multiple components connected sequentially via electrode connectors for large-scale application. Attached Figure Description

[0033] Figure 1This is a schematic diagram of a planar structure of the present invention;

[0034] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0035] In the diagram, 1-terminal; 2-flexible electrode; 3-channel; 4-upper semi-permeable membrane; 5-wire; 6-lower semi-permeable membrane. Detailed Implementation

[0036] Example 1:

[0037] like Figure 1 The waste salt utilization device shown has two layers of semi-permeable membranes sealed in the middle, with multiple parallel narrow channels 3 reserved in between; a certain number of fine sodium chloride waste salt particles are reserved in the channels 3.

[0038] Each narrow channel 3 has a flexible electrode 2 at its left and right ends. The middle part of the flexible electrode 2 is sealed together by two layers of semi-permeable membrane. The inner end of the flexible electrode 2 can contact the waste salt particles inside the channel 3, and the outer end can be connected to the wire 5. The outer ends of all the electrodes on the left end are connected to the same wire 5, and the outer ends of all the electrodes on the right end are connected to the same wire 5. The wire 5 is connected to a terminal 1, which can be connected to the positive and negative terminals of the DC power supply.

[0039] When in use, it is laid on the roof, with the narrow channel 3 positioned at a basically horizontal level. A small portion of the melted snow water seeps into the long channel 3 between the two semi-permeable membranes, where the sodium chloride powder dissolves into a sodium chloride solution electrolyte. When electricity is applied, the electrolyte heats up, causing the snow to melt into water. Most of the water flows into rainwater pipes, municipal pipe networks, green belts, or farmland. The water does not contain inorganic salts and does not pollute the environment.

[0040] The roof melts snow quickly after it snows, reducing the load on the roof.

[0041] Example 2:

[0042] like Figure 2 The waste salt utilization device shown contains fine sodium chloride and a small amount of calcium chloride mixed particles encapsulated in the middle channel 3 by two layers of semi-permeable membranes. The channel 3 consists of five parallel, narrow channels 3.

[0043] Each narrow channel 3 has a flexible electrode 2 at its left and right ends. The inner end of the flexible electrode 2 can contact the waste salt particles inside the channel 3, and the outer end is connected to the wire 5. The outer ends of all the electrodes at the left end are connected to the same wire 5, and the outer ends of all the electrodes at the right end are connected to the same wire 5. The outer ends are sealed between two semi-permeable membranes, which also serve as the insulating shell for the flexible electrode 2 and the wire 5 to which it is connected.

[0044] The two wires 5 can be connected to a plug, which can be connected to an AC power source.

[0045] When used before snowfall, lay it on a level surface, connect it to an AC power source, and a small portion of the melted snow water will seep into the long, narrow channel 3 between the two semi-permeable membranes. The sodium chloride and a small amount of calcium chloride in the channel will dissolve into a mixed electrolyte solution. The wires and the electrolyte solution together form a connected circuit. When energized, the electrolyte solution will heat up due to its own resistance.

[0046] The electrolyte solution transfers heat to the snow or water in the outside through a double-layered semi-permeable membrane, causing the snow or water to heat up and melt rapidly into water or evaporate directly, thus quickly melting the snow on its surface.

[0047] When it is not snowing, after the moisture in channel 3 has evaporated and dried, it is rolled up, collected, and stored for reuse next time.

[0048] Example 3:

[0049] In Example 2, a lower AC voltage (such as a safe voltage of less than 36V) is used to make the electrolyte solution conduct heat and generate a temperature higher than 4-10°C, which consumes little energy; moreover, the heated snow water becomes flowing rainwater, which can drive the surrounding snow to melt, resulting in lower snow melting costs.

Claims

1. A waste salt utilization device that applies alternating current, characterized in that: Fine inorganic salt particles are encapsulated in the middle channel (3) by two layers of semi-permeable membranes. The channel (3) is one or more parallel narrow channels (3). The inorganic salt is one or a mixture of several industrial waste salts selected from sodium chloride, calcium chloride, magnesium chloride, potassium chloride, sodium sulfate, and potassium sulfate. The narrow channel (3) has a flexible electrode (2) at its left and right ends respectively. The middle part of the flexible electrode (2) is sealed together by two semi-permeable membranes. The inner end of the flexible electrode (2) can contact the waste salt particles inside the channel (3), and the outer end can be connected to a wire. The semi-permeable membrane allows water molecules to pass through, but electrolyte ions in the solution cannot. The outer ends of all left flexible electrodes are connected to the same wire, and the outer ends of all right flexible electrodes are connected to another wire. The same wire and the other same wire are respectively connected to a terminal (1) or a plug. The two terminals (1) or plugs can be connected to an AC power source. When in use, it is laid on the ground, roof or countertop, with the channels arranged in a basically horizontal position. After the rain or snow falls, the water from the snow or rain will gradually permeate into the channels through the semi-permeable membrane, causing the waste salt particles in the channels to dissolve and form an electrolyte solution. At this time, the two terminals (1) or plugs are connected to the AC power supply, and the two wires and the electrolyte solution form a conductive circuit. The electrolyte solution becomes an element that generates heat, so that the rain or snow above or below it is heated and melted or evaporated, accelerating the melting of snow or removal of water. Once the accumulated water or snow has melted and been removed, the water in the electrolyte solution is mostly evaporated by the heat generated by its own electrical conduction, and the inorganic salt recrystallizes into non-conductive inorganic salt particles.

2. The waste salt utilization device with AC power applied as described in claim 1, characterized in that: The outer end of the flexible electrode (2) is sealed between two semi-permeable membranes, which also serve as the insulating shell for the flexible electrode (2) and the wires connected to it.

3. The waste salt utilization device with AC power applied as described in claim 1 or 2, characterized in that: When not in use, one end of the channel is raised and the other end is lowered. The channel is not kept in a horizontal position, so it cannot form an effective circuit and will not generate heat when powered on.

Images