Special container bag for landfill

Abstract

The utility model relates to the technical field of flexible freight bags, in particular to a special landfill flexible freight bag and a construction method thereof. The special landfill container bag comprises a waterproof inner bag and an outer bag, and the waterproof inner bag is processed into a complete inner bag by adopting a thermoplastic forming process; the outer bag is connected to the exterior of the waterproof inner bag and used for positioning the periphery of the waterproof inner bag to prevent the volume of the waterproof inner bag from being expanded, and the outer bag is inelastic; material pouring ports are formed in the waterproof inner bag and the outer bag, the material pouring pipe comprises an inner material pouring pipe and an outer material pouring pipe which are matched with each other, the inner material pouring pipe is arranged on the material pouring port of the waterproof inner bag in a thermoplastic mode, and the material pouring port of the outer bag is connected with the outer material pouring pipe. The double-layer structure is adopted, the inner bag is waterproof, the outer bag is used for limiting the periphery of the inner bag and preventing the inner bag from being broken, polyethylene and polypropylene are preferably selected as raw materials, cost is low, and sealing performance is good.

Description

Technical Field

[0001] The utility model relates to the technical field of container bags, and more specifically, to a special container bag for landfill. Background Art

[0002] Waste incineration power generation involves placing waste in a high-temperature furnace to fully oxidize the combustible components, and the heat energy generated is used to generate electricity or provide heating. During the incineration process of domestic waste, secondary pollutants such as acidic gases, smoke particles, heavy metals, and dioxins are often produced. Among them, incineration fly ash is the main carrier of secondary pollution and also the route of its spread. Therefore, incineration fly ash is a substance harmful to the human body. Waste incineration fly ash is a hazardous waste listed in the "National List of Hazardous Wastes" because it contains a variety of harmful substances, including heavy metals and organic pollutants, which are potentially harmful to the environment and human health. Waste incineration fly ash must be fully included in unified and standardized collection, storage, pretreatment, landfill disposal and supervision.

[0003] Currently, waste incineration fly ash is disposed of harmlessly, either as landfill or as waste. With adjustments to national land policies, land resources are becoming increasingly scarce, and land available for landfill is even more limited. Existing landfills typically use ton-bag lifting and pouring methods to dispose of fly ash.

[0004] Ton bag lifting and filling method: small ton bags are placed unevenly, occupying a large area and wasting storage capacity; the operation is cumbersome and requires a lot of manpower, forklift crane loading and unloading turnover, and high transportation costs; cranes and excavators need to lay a large amount of steel plates during operation, which may cause the original landfill protective layer to be damaged, making the ton bags insufficiently sealed and allowing surface water to penetrate.

[0005] The pouring landfill method: Fly ash, water, and a chelating agent are heated and then poured into preformed nylon bags at the landfill site using a mixer truck and water pumps. During use, the nylon bags can develop sewing holes, damaging the original sealing layer. This leads to insufficient sealing, allowing ammonia and odor to leak, impacting the surrounding ecological environment and environmental safety. Existing single-layer plastic bags require controlled filling and are prone to bursting. Using other single-layer materials also results in poor sealing and waterproofing. Utility Model Content

[0006] The existing technology has the following problems: Ton bags are used to store fly ash chelates in landfills. The ton bags are small in size, and a large number of ton bags are used. There are large gaps between the ton bags after they are placed, which will cause a waste of landfill space. In addition, the ton bags need to be lifted up by a crane when they are placed, which is complicated to operate. The crane may press the ton bags underneath due to its own weight, causing the fly ash chelates to leak. The stitches on the seams of the nylon bags affect the sealing of the nylon bags. The poor sealing of the nylon bags causes the fly ash chelates to penetrate the nylon bags and pollute the environment, and the nylon bags are also expensive. The utility model proposes a special container bag for landfill, which adopts a double-layer structure. The inner bag is waterproof, and the outer bag is used to limit the periphery of the inner bag to prevent the inner bag from being broken. The utility model preferably uses polyethylene and polypropylene as raw materials, which are low in cost and have good sealing properties.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] Special container bag for landfill, said special container bag for landfill comprises a waterproof inner bag and an outer bag,

[0009] The waterproof inner bag is made of thermoplastic molding technology to form a complete inner bag;

[0010] The outer bag is connected to the outside of the waterproof inner bag. The outer bag is used to position the outer periphery of the waterproof inner bag to prevent the volume of the waterproof inner bag from being expanded. The outer bag has no elasticity;

[0011] The waterproof inner bag and the outer bag are provided with pouring ports, and the pouring pipes include an inner pouring pipe and an outer pouring pipe that cooperate with each other. The pouring port of the waterproof inner bag is thermoplasticized with the inner pouring pipe, and the pouring port of the outer bag is connected with the outer pouring pipe.

[0012] This technical solution is further optimized, and the material of the waterproof inner bag is PE.

[0013] This technical solution is further optimized, and the material of the outer bag is PP.

[0014] The technical solution is further optimized in that a coating is provided inside the outer pouring tube of the outer bag.

[0015] This technical solution is further optimized, and the coating is made of polyethylene or polypropylene material.

[0016] The technical solution is further optimized in that the pouring port is a circular port or a square port.

[0017] This technical solution is further optimized by adding a circle of double-sided tape around the pouring port of the waterproof inner bag.

[0018] This technical solution is further optimized in that the waterproof inner bag is fixedly connected to the outer bag.

[0019] This technical solution is further optimized in that the waterproof inner bag and the outer bag are bonded together by double-sided tape.

[0020] This technical solution is further optimized in that the outer bag is sewn and fixed with double-sided tape again.

[0021] This technical solution is further optimized in that cotton strips and / or non-woven fabrics are provided at the seams of the outer bag.

[0022] This technical solution is further optimized, the thickness of the waterproof inner bag is 0.13 mm-0.18 mm, and the thickness of the outer bag is 200g / m 2 -250g / m 2 .

[0023] The construction method of landfilling garbage with special container bags includes the following steps:

[0024] 1) Mix fly ash, water, chelating agent and curing agent and heat them to form a viscous liquid, namely fly ash chelate;

[0025] 2) The discharge port of the discharge pipe is placed into the waterproof inner bag through the inner pouring pipe. The size of the discharge pipe is smaller than the inner bag material pipe. The fly ash chelate is pumped through the discharge pipe to be transported into the landfill-specific container bag;

[0026] 3) During the discharge process, when the bag is filled with 60%-70%, apply pressure to the bag to make the fly ash chelate flow evenly in the bag, which is convenient for further addition and prevents the bag from being full near the discharge pipe and empty elsewhere.

[0027] 4) If the current discharge port cannot continue to add material and the container bag still has spare capacity, change the discharge port and continue adding material until the container bag is full.

[0028] Different from the existing technology, the above technical solution has the following beneficial effects:

[0029] 1. The specialized bulk bags proposed in this utility model are tightly packed together during landfilling. Using the bulk bags in this utility model allows for more fly ash chelates to be landfilled in the same landfill pit. Furthermore, the utility model uses a pipeline to discharge materials into the bulk bags, making operation simple.

[0030] 2. The special landfill container bags proposed by the present invention use PP and PE, which are cheaper than nylon bags and reduce the production costs of enterprises.

[0031] 3. When ton bags are placed together, they are uneven. The container bags of the utility model are more flat, sink steadily in the landfill pit, and have good flatness. When 80% of the soil is filled on the container bags, the land surface is flat, which can achieve land restoration, the land can be continued to be used, and resources are saved.

[0032] 4. The container bag of this utility model has very good sealing performance and will not leak, which better protects the ecological environment.

[0033] 5. The special container bag for landfill of the utility model not only has a large capacity, but also is easy to construct and will not affect the original landfill protective layer.

[0034] 6. The utility model adopts double-layer bags, and the waterproof inner bag and outer bag are made of different materials, which solves the problem that the existing bags are not fully filled and waste space, and the problem that overfilling causes the bags to rupture and pollute the environment. When the container bags of the utility model are used, the filling construction process is much simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is an external display diagram of the container bag of the utility model;

[0036] Figure 2 This is a schematic diagram of the connection between the PP outer bag and the PE inner bag;

[0037] Figure 3 This is the structure diagram of the PP outer bag;

[0038] Description of reference numerals:

[0039] 1. PP outer bag; 2. PE inner bag; 3. Glue; 4. Discharge tube. DETAILED DESCRIPTION

[0040] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.

[0041] Special container bag for landfill, said special container bag for landfill comprises a waterproof inner bag and an outer bag,

[0042] The waterproof inner bag is made of thermoplastic molding technology to form a complete inner bag;

[0043] The outer bag is connected to the outside of the waterproof inner bag. The outer bag is used to position the outer periphery of the waterproof inner bag to prevent the volume of the waterproof inner bag from being expanded. The outer bag has no elasticity;

[0044] The waterproof inner bag and the outer bag are provided with pouring ports, and the pouring pipes include an inner pouring pipe and an outer pouring pipe that cooperate with each other. The pouring port of the waterproof inner bag is thermoplasticized with the inner pouring pipe, and the pouring port of the outer bag is connected with the outer pouring pipe.

[0045] See Figure 1-3 The figure is a schematic diagram of a preferred embodiment of the present invention. The landfill container bag comprises a PE inner bag 2, a PP outer bag 1 and a pouring pipe 4.

[0046] PE inner bag 2, processed into a complete inner bag using thermoplastic molding technology;

[0047] PP outer bag 1 is connected to the outside of PE inner bag 2. The size of PP outer bag 1 is not larger than that of PE inner bag 2.

[0048] The PE inner bag 2 and the PP outer bag 1 are provided with pouring ports, and the pouring pipe 4 includes a PE inner pouring pipe and a PP outer pouring pipe that cooperate with each other. The pouring port of the PE inner bag 2 is thermoplasticized onto the PE inner pouring pipe, and the pouring port of the PP outer bag 1 is connected to the PP outer pouring pipe.

[0049] The thickness of the PE inner bag 2 is 0.13mm-0.18mm, and the thickness of the PP outer bag 1 is 200g / m 2 -250g / m 2 .

[0050] The PE inner bag 2 is fixedly connected to the PP outer bag 1. In this embodiment, double-sided tape 3 is placed between the inner and outer bags 1 to adhere the PE inner bag 2 and the PP outer bag 1 together. To ensure a perfect fit between the PE inner bag 2 and the PP outer bag 1, this embodiment sews the PP outer bag 1 and the double-sided tape 3 together. During the sewing process, the needle cannot penetrate the PE inner bag 2. To prevent leakage of the fly ash chelate, cotton strips and / or nonwoven fabric are added to the seams to seal the PP outer bag 1.

[0051] Both polypropylene and polyethylene have good waterproof properties. Since the PE inner bag 2 is made by thermoplastic molding, it does not need to be sewn and has no pinholes, which makes it more airtight. The double-layer waterproof function makes the container bag of this embodiment have better sealing performance.

[0052] Because the PE inner pipe can be damaged during the discharge process, a waterproof coating is applied to the inner PP outer pipe to prevent the outflow of fly ash chelates. The inner coating is a polypropylene / polyethylene film. The PP outer pipe is thicker and harder, weighing approximately 220g per square meter.

[0053] In order to make the PE inner pouring pipe and the PP outer pouring pipe fit better, a circle of double-sided tape 3 is added around the pouring port of the PE inner bag 2 to fix the inner and outer pouring ports and prevent them from shifting.

[0054] PP (polypropylene) is relatively soft, falling somewhere between hard and soft. PE is even softer than PP. Therefore, this implementation incorporates a coating inside the PP outer discharge tube to increase its rigidity and facilitate insertion of the discharge tube.

[0055] After the waste incineration fly ash, water, chelating agent, and curing agent are heated and stirred in a mixer truck, a waste fly ash chelate is obtained. The waste fly ash chelate contains a large amount of water and is in a liquid state. The liquid waste fly ash chelate is placed in a landfill-specific container bag of this embodiment. The solidification time of the waste fly ash chelate is usually about 2-3 days.

[0056] The landfill-specific container bag proposed in the present invention is divided into an inner bag and an outer bag. The inner bag is made of PE (polyethylene), which has a certain degree of elasticity, while the PP outer bag is not. The PE inner bag 2 in the present invention is larger than the PP outer bag 1. Since the fly ash chelate is in a liquid state, due to the certain elasticity of the PE inner bag 2, if the amount of fly ash chelate loaded is not controlled in a timely manner, the amount of fly ash chelate loaded may exceed the original capacity of the PE inner bag 2, causing the PE inner bag 2 to expand and potentially burst, causing the fly ash chelate to leak and cause environmental pollution. However, the PE inner bag 2 in the present invention is larger than the PP outer bag 1 and is not elastic. When the fly ash chelate is loaded into the PE inner bag 2, the PP outer bag 1 acts as a fixed size, that is, a fixed capacity. When the PP outer bag 1 is full, the PE inner bag 2 still has some space, and the PE inner bag 2 is not stressed, while the PP outer bag 1 is stressed. This prevents the PE inner bag 2 from bursting and the fly ash chelate from leaking. The PP outer bag 1 is smaller than the PE inner bag 2, which also eliminates the problem of workers controlling the loading amount when loading the fly ash chelate. The workers only need to stop when the bag is full without worrying about the PE inner bag 2 being broken.

[0057] Because the bulk bag is quite large, measuring hundreds of square meters, it is equipped with multiple discharge ports. A bulk bag can hold nearly 100 tons of landfill material (capacity varies depending on the size of the bag). The fly ash chelate solidifies slowly, and pouring through the multiple discharge ports allows the bag to be completely filled. These multiple discharge ports also allow for venting, fully utilizing the bag's space. After the bulk bag is filled with fly ash chelate, the discharge pipe 4 is sealed. In this embodiment, the discharge pipe 4 is secured with a rope. The rope in this embodiment is fixed to the outer discharge pipe 4.

[0058] The landfill pit floor is flat, and the fly ash chelate is sticky, making it difficult to flow smoothly. Multiple discharge ports are needed to prevent underfilling of the bulk bag, which would otherwise waste space. The fly ash chelate liquid is viscous, so if you start pouring from one port, the fly ash chelate will adhere and solidify around the port, causing it to become clogged and prevent the fly ash chelate from being pumped in. If one port is unable to continue pouring, a different port is used to maximize the bulk bag's capacity and avoid wasting space.

[0059] The multiple discharge ports also have the function of exhausting. That is, when the garbage fly ash chelate flows in the container bag during discharge, exhaust can be carried out from the discharge port (to remove air and heat from the container bag).

[0060] The discharge pipe 4 is relatively long, and in this embodiment, it is set at 60 cm. Since the container bag is relatively large, the long discharge pipe 4 will make the discharge pipe inserted into the discharge port relatively stable. The garbage fly ash chelate is a liquid and is generally loaded into the container bag through a pipe. If the discharge pipe 4 is relatively short, then when the garbage fly ash chelate is loaded into the container bag, the discharge pipe mouth may move due to unstable conveying pressure, causing it to fall off the discharge pipe 4. If the discharge pipe falls off the discharge pipe 4, the fly ash chelate will be discharged outside the container bag, causing pollution. The discharge pipe is inserted into the discharge port for pouring. Since the discharge pipe 4 is relatively long, the discharge pipe has a certain amount of movement space, making it difficult for the discharge pipe to fall out.

[0061] The PE inner bag 2 and the PP outer bag 1 of this embodiment are made of degradable materials and will not cause secondary pollution to the environment.

[0062] The steps for making special container bags for landfill are as follows:

[0063] 1. According to the size requirements, the PP fabric is cut into two pieces of fabric with a length of 18.5 meters and a width of 7.6 meters for use.

[0064] 2. According to the size of the outer bag 1, the PE inner bag 2 is taken. The length of the PP inner bag 2 is 1-1.2 meters longer than the length of the PP outer bag 1, and the width of the PP inner bag 2 is 50-60 cm wider than the width of the PP outer bag 1 to ensure that the PP inner bag 2 is stretchable.

[0065] 3. Calculation: According to the characteristics of garbage fly ash chelate, determine the best location and number of discharge ports to ensure that the fly ash chelate can enter the bag smoothly, with an average of 25-40m 2 A pouring port is made on the upper layer of the container bag.

[0066] 4. After the preparation work is completed, find the application tools and start making the pouring port. In order to better thermoplasticize, the pouring port of this embodiment is a circular port or a square port, which is convenient for thermoplasticizing the inner pouring tube 4 and the PE inner bag 2 together without any gap.

[0067] 5. Thermoforming of the Dumping Spout: The PE inner bag 2's pouring spout is thermoformed within a circular perimeter of approximately 3 cm. Following the same steps, the remaining inner pouring spouts are then thermoformed into a complete PE inner bag (with only the pouring spout sealed). Thermoforming of the inner pouring tube and spout is technically challenging, so this embodiment utilizes a small, portable thermoforming machine.

[0068] 6. After the inner pouring tube 4 is completed, auxiliary work needs to be done to fit the PE inner bag 2 to the PP outer bag 1. Take dozens of pieces of tape of the same length and stick them on the upper outer layer of the PP inner bag 2 at intervals of 0.9-1 meters. The purpose of the tape is to facilitate the fit of the PE inner bag 2 to the PP outer bag 1, which not only enhances the fastness but also prevents the inner bag 2 from shifting. Add a layer of tape around the inner pouring port to further strengthen the fastness. The PE inner bag 2 is made of a smooth material, and the tape can prevent shifting.

[0069] 7. After all preparations for the PE inner bag 2 are completed, start sewing the PP outer bag 1. First, lay the PP outer bag 1 flat, stick double-sided tape 3 on the longitudinal and / or transverse center line of the lower layer of the PP outer bag, and mark the relative position of at least one side of the PE inner bag and the PP outer bag at equal distances, with the same number of marking points.

[0070] 8. Securing the inner and outer bags 1: First, sew the bottom tape of the PE inner bag 2 to the bottom of the PP outer bag 1 (do not sew to the PE inner bag). Glue the tape 3 firmly. Then, sew the upper piece of the PP outer bag 1 to the double-sided tape 3 on the upper layer of the PE inner bag. Do not sew to the PE inner bag 2 during the sewing process. During the sewing process, cotton strips, non-woven fabrics, and other auxiliary materials will be added to achieve a sealing effect. After the inner and outer bags 1 are sewn together, finally sew the inside and outside of the material discharge port. Sew the PE inner bag 2 and the PP outer bag 1 according to the marked points. The seam between the PE inner bag 2 and the PP outer bag 1 is located outside the thermoplastic, not inside the PP inner bag 2. The seam will not affect the sealing of the PE inner bag 2. After all work is completed, perform water or air inflation tests to test whether each bag meets the sealing standards.

[0071] Construction steps of fly ash chelate landfill:

[0072] 1) Mix fly ash, water, chelating agent, curing agent, etc. and heat them to form a viscous liquid, namely fly ash chelate;

[0073] 2) The discharge port of the discharge pipe is placed into the PE inner bag 2 through the inner pouring pipe. The size of the discharge pipe is smaller than the inner bag material pipe. The fly ash chelate is pumped through the discharge pipe to be transported into the landfill-specific container bag;

[0074] 3) During the discharge process, when the bag is 60%-70% filled, pressure is applied to the bag. This is done by workers stepping back and forth on the bag to make the fly ash chelate flow evenly in the bag, making it easier to continue adding material and preventing the bag from being full near the discharge pipe while other places in the bag are empty.

[0075] 4) If the current discharge port cannot continue to add material and the container bag still has spare capacity, change the discharge port and continue adding material until the container bag is full.

[0076] It should be noted that, in this document, relational terms such as first and second, etc., are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprise," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. Without further limitation, elements defined by the phrase "include..." or "comprising..." do not exclude the presence of additional elements in the process, method, article, or terminal device comprising the elements. Furthermore, in this document, "greater than," "less than," "exceeding," etc., are understood to exclude the number itself; "above," "below," "within," etc., are understood to include the number itself.

[0077] Although the above embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they know the basic creative concepts. Therefore, the above description is only an embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of the present invention, or directly or indirectly used in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. Special container bag for landfill, characterized by: The landfill-specific container bag includes a waterproof inner bag and an outer bag. The waterproof inner bag is made of thermoplastic molding technology to form a complete inner bag; The outer bag is connected to the outside of the waterproof inner bag. The outer bag is used to position the outer periphery of the waterproof inner bag to prevent the volume of the waterproof inner bag from being expanded. The outer bag has no elasticity; The waterproof inner bag and the outer bag are provided with pouring ports, and the pouring ports are connected to the pouring pipes. The pouring pipes include an inner pouring pipe and an outer pouring pipe that cooperate with each other. The pouring port of the waterproof inner bag is thermoplasticized with the inner pouring pipe, and the pouring port of the outer bag is connected to the outer pouring pipe.

2. The landfill-specific container bag according to claim 1, characterized in that: The material of the waterproof inner bag is PE.

3. The landfill-specific container bag according to claim 1, characterized in that: The material of the outer bag is PP.

4. The landfill-specific container bag according to claim 1, characterized in that: A coating is provided inside the outer pouring tube of the outer bag.

5. The landfill-specific container bag according to claim 4, characterized in that: The coating is made of polyethylene or polypropylene material.

6. The landfill-specific container bag according to claim 1, characterized in that: The pouring opening is a circular opening or a square opening.

7. The landfill-specific container bag according to claim 1 or 4, characterized in that: A circle of double-sided tape is added around the pouring port of the waterproof inner bag.

8. The landfill-specific container bag according to claim 1, characterized in that: The waterproof inner bag and the outer bag are fixedly connected together.

9. The landfill-specific container bag according to claim 8, characterized in that: The waterproof inner bag and the outer bag are bonded together by double-sided tape.

10. The landfill-specific container bag according to claim 9, characterized in that: The outer bag is sewn and fixed with the double-sided tape again.

11. The landfill-specific container bag according to claim 10, wherein: Cotton strips and / or non-woven fabrics are provided at the seaming portion of the outer bag.

12. The landfill-specific container bag according to claim 1, wherein: The thickness of the waterproof inner bag is 0.13 mm to 0.18 mm, and the thickness of the outer bag is 200 g / m 2 -250g / m 2 .

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