Special container bag for landfill and construction method thereof

Abstract

The invention 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 present invention relates to the technical field of bulk bags, and more specifically, to a bulk bag for landfill and a construction method thereof. Background Art

[0002] Waste incineration power generation is to place waste in a high-temperature furnace to fully oxidize the combustible components, and the heat energy generated is used for power generation or 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 way it spreads. 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] At present, the disposal of fly ash from garbage incineration at home and abroad adopts harmless treatment, that is, landfill as waste. With the adjustment of the country's land policy, land resources are relatively scarce, and the land available for landfill is even more limited. The existing landfills generally use ton bag lifting landfill and pouring landfill operations to treat 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] Pouring landfill method: After the fly ash, water and chelating agent are heated, they are poured into the nylon bags formed in the landfill area by using mixer trucks, water pumps and other equipment. During the use of nylon bags, sewing needle holes damage the original sealing layer, resulting in insufficient sealing, which causes the leakage of ammonia and odor, affecting the surrounding ecological environment and environmental safety. The existing single-layer bag material is plastic, and the amount of filling must be controlled during filling, and the bag is easy to be broken. If other single-layer materials are used, the sealing and waterproofing effect is not good. Summary of the invention

[0006] The following problems exist in the prior art: Ton bags are used to store fly ash chelates in fly ash landfills. The ton bags are small in size, but 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 below due to its own weight, causing the fly ash chelates to leak. The nylon bags have stitches at the seams, which affects 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 expensive. The present invention 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 present invention preferably uses polyethylene and polypropylene as raw materials, which are low in cost and have good sealing.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A container bag for landfill, wherein the 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] The technical solution is further optimized in that the material of the waterproof inner bag is PE.

[0013] The technical solution is further optimized in that 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] The technical solution is further optimized in that the coating is made of polyethylene or polypropylene material.

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

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

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

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

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

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

[0022] The 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] A construction method for landfilling garbage using the special container bag in the above claims, comprising the following steps:

[0024] 1) Mix and heat garbage fly ash, water, chelating agent and curing agent to form a viscous liquid, i.e. garbage 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 garbage fly ash chelate is pumped through the discharge pipe to the landfill-specific container bag;

[0026] 3) During the discharge process, when the bulk bag is filled with 60%-70%, pressure is applied to the bulk bag to make the garbage fly ash chelate flow evenly in the bulk bag, which is convenient for continued addition and prevents the area near the discharge pipe from being full while other places in the bag are empty;

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

[0028] Different from the prior art, the above technical solution has the following beneficial effects:

[0029] 1. When the special container bags for landfill proposed by the present invention are used for landfilling, the containers are tightly combined with each other. For the same landfill pit, more garbage fly ash chelates can be landfilled by using the container bags of the present invention. In addition, the present invention uses pipelines to discharge materials into the container bags, which is simple to operate.

[0030] 2. The PP and PE used in the landfill-specific container bags proposed by the present invention are cheaper than nylon bags, thus reducing the production costs of enterprises.

[0031] 3. Ton bags are uneven when placed together. The container bags of the present invention are more flat and sink steadily in the landfill pit with good flatness. When 80% of the soil is filled on the container bags, the surface of the land is flat, which can realize land restoration, the land can be continuously used, and resources are saved.

[0032] 4. The container bag of the present invention has excellent sealing performance and will not leak, which better protects the ecological environment.

[0033] 5. The landfill-specific container bag of the present invention not only has a large capacity but also is easy to construct and will not affect the original landfill protective layer.

[0034] 6. The present invention adopts a double-layer bag, 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 present invention 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 present invention;

[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] A container bag for landfill, wherein the 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 also 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 dumping pipe 4.

[0046] PE inner bag 2, processed into a complete inner bag by thermoplastic molding process;

[0047] PP outer bag 1 is connected to the outside of PE inner bag 2, and 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 0.13 mm-0.18 mm, and the thickness of the PP outer bag 1 is 200 g / m 2 -250g / m 2 .

[0050] The PE inner bag 2 is fixedly connected to the PP outer bag 1. In this embodiment, a double-sided adhesive tape 3 is placed between the inner and outer bags 1 to bond the PE inner bag 2 to the PP outer bag 1. In order to make the PE inner bag 2 and the PP outer bag 1 fit completely, the PP outer bag 1 is sewed with the double-sided adhesive tape 3. During the sew process, the needle cannot pass through the PE inner bag 2. At the same time, in order to prevent the leakage of the garbage fly ash chelate, cotton strips or / and non-woven fabrics are added to the sutures of this embodiment to facilitate the sealing of the PP outer bag 1.

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

[0052] Since the PE inner pouring pipe may be damaged during the pouring process, in order to prevent the outflow of the garbage fly ash chelate, a coating is set inside the PP outer pouring pipe. The coating has a waterproof effect to prevent the outflow of the garbage fly ash chelate. The inner coating of the PP outer pouring pipe is a polypropylene / polyethylene coating. The thickness of the PP outer pouring pipe is strengthened and it will become hard, about 220g per square.

[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 material (polypropylene) is relatively soft, and its softness is between hard and soft. PE is softer than PP. Therefore, the embodiment sets a coating inside the PP outer pouring pipe to increase the hardness of the PP outer pouring pipe and facilitate the insertion of the discharge pipe.

[0055] After the waste incineration fly ash, water, chelating agent, curing agent, etc. are heated and stirred by a mixer truck, a waste fly ash chelate is obtained. The waste fly ash chelate contains a large amount of water in a liquid state. The liquid waste fly ash chelate is loaded into the 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 elasticity, while the PP outer bag has no elasticity. The PE inner bag 2 of the present invention is larger than the PP outer bag 1. The garbage fly ash chelate is in a liquid state. Since the PE inner bag 2 has a certain elasticity, the loading amount of the garbage fly ash chelate is not controlled in time. The loaded garbage fly ash chelate is too much, exceeding the original capacity of the PE inner bag 2, so that the PE inner bag 2 is expanded, and then the PE inner bag 2 may be broken, thereby causing the garbage fly ash chelate to leak out and cause environmental pollution. The PE inner bag 2 of the present invention is larger than the PP outer bag 1, and the PP outer bag 1 has no elasticity. When the garbage fly ash chelate is loaded into the PE inner bag 2, the PP outer bag 1 will play a role of fixing the size, that is, fixing the capacity of the bag. When the PP outer bag 1 is full, the PE inner bag 2 still has a certain amount of space. The PE inner bag 2 is not stressed, while the PP outer bag 1 is stressed. In this way, the PE inner bag 2 will not be broken, and the garbage fly ash chelate will not leak. The PP outer bag 1 is smaller than the PE inner bag 2, which also saves 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, and there is no need to worry about the PE inner bag 2 being damaged.

[0057] Since the container bag is hundreds of square meters, it is relatively large, so multiple discharge ports are provided on the container bag. The container bag can hold nearly 100 tons of landfill material (the container bag has different sizes and different capacities), which is relatively large. Multiple discharge ports are provided on the container bag. The fly ash chelate will slowly solidify. The container bag can be filled by pouring it through multiple discharge ports in multiple directions. The multiple discharge ports can exhaust air and fully utilize the space of the container bag. After the garbage fly ash chelate is filled, the discharge pipe 4 is sealed. This embodiment uses a rope to tie the discharge pipe 4. The rope of this embodiment is fixed on the outer discharge pipe 4.

[0058] The bottom of the landfill pit is flat, and the fly ash chelate is sticky and does not flow smoothly. Multiple discharge ports are used to prevent the container bag from being insufficiently filled and wasting space. The fly ash chelate liquid is viscous, and multiple discharge ports are used. When discharging from one discharge port, the fly ash chelate will adhere and solidify around the discharge port during the discharge process, causing the discharge port to be blocked and the fly ash chelate cannot be pumped in. If one discharge port cannot continue to discharge, use another discharge port to discharge the material to ensure that the capacity of the container bag is maximized and no space is wasted.

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

[0060] The dumping pipe 4 is relatively long, and this embodiment is set to 60cm. Since the container bag is relatively large, the dumping pipe 4 is long, which will make the discharge pipe inserted into the dumping port relatively stable. The garbage fly ash chelate is a liquid, and is generally loaded into the container bag through a pipe. If the dumping 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, thereby falling off from the dumping pipe 4. If the discharge pipe falls off from the dumping pipe 4, the fly ash chelate will be discharged outside the container bag, causing pollution. The discharge pipe is inserted into the dumping port for dumping. Since the dumping pipe 4 is relatively long, the discharge pipe has a certain amount of movement space, so that the discharge pipe is not easy 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 a special container bag 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 centimeters 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 fly ash chelate, determine the best location and number of discharge ports to ensure that fly ash chelate can enter the bag smoothly, with an average of 25-40m 2 A dumping 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 round or square port, which is convenient for thermoplasticizing the inner pouring tube 4 and the PE inner bag 2 together without any gap.

[0067] 5. Thermoplastic filling port: Thermoplastic filling port of PE inner bag 2 is placed within the range of about 3 cm of the circular periphery for thermoplasticization. After completing the other inner filling ports in turn according to the same steps, the PE inner bag 2 is thermoplasticized into a complete bag (only the filling port, other places are all closed). Thermoplastic filling of the inner filling pipe and the inner filling port is technically difficult, and this embodiment uses a movable small thermoplastic machine.

[0068] 6. After the inner pouring pipe 4 is completed, auxiliary work needs to be done to make the PE inner bag 2 fit with the PP outer bag 1. Take dozens of pieces of tape of the same length and paste them on the upper outer layer of the PP inner bag 2 at intervals of 0.9-1 meters. The role of the tape is to facilitate the fit of the PE inner bag 2 and the PP outer bag 1, which not only enhances the fastness but also prevents the inner bag 2 from shifting. A layer of tape is added around the inner pouring port to further enhance the fastness. The material of the PE inner bag 2 is relatively smooth, 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 the same distance, with the same number of marking points.

[0070] 8. Fixing of inner and outer bags 1: First sew the bottom tape of PE inner bag 2 to the bottom of PP outer bag 1 (do not sew to PE inner bag), stick the tape 3 firmly, then sew the upper piece of PP outer bag 1 to the double-sided tape 3 on the upper layer of PE inner bag, do not sew to PE inner bag 2 during sewing, cotton strips, non-woven fabrics and some auxiliary materials will be added during the sewing process to achieve sealing. After the inner and outer bags 1 are sewn, finally sew the inside and outside at the pouring port. Sew the PE inner bag 2 and PP outer bag 1 according to the marked point position. The seam between PE inner bag 2 and PP outer bag 1 is located outside the thermoplastic, not inside the bag of PP inner bag 2, and the seam will not affect the sealing of PE inner bag 2. After all the work is done, perform water pumping or inflation experiments to test whether the sealing of each bag meets the standard.

[0071] Construction steps of fly ash chelate landfill:

[0072] 1) Mix and heat garbage fly ash, water, chelating agent, curing agent, etc. to form a viscous liquid, namely, garbage 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 garbage 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 bulk bag is filled with 60%-70%, pressure is applied to the bulk bag. The implementation is that the worker steps back and forth on the bulk bag to make the garbage fly ash chelate flow evenly in the bulk bag, which is convenient for continuing to add materials and prevents the area near the discharge pipe from being full while other positions in the bag are relatively empty;

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

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "include..." or "comprise..." do not exclude the existence of other elements in the process, method, article or terminal device including the elements. In addition, in this article, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself.

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

Claims

1. Special container bag for landfill, characterized by: The landfill container bag comprises a waterproof inner bag and an outer bag, wherein the waterproof inner bag is processed into a complete inner bag by a thermoplastic molding process; 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. The size of the outer bag is not larger than 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 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 to the inner pouring pipe, and the pouring port of the outer bag is connected to the outer pouring pipe; the material of the waterproof inner bag is PE; the material of the outer bag is PP.

2. The landfill container bag according to claim 1, characterized in that: A coating is arranged inside the outer pouring pipe of the outer bag.

3. The landfill container bag according to claim 2, characterized in that: The coating is made of polyethylene or polypropylene material.

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

5. The landfill container bag according to claim 1 or 2, characterized in that: A circle of double-sided tape is added around the pouring opening of the waterproof inner bag.

6. The landfill container bag according to claim 1, characterized in that: The waterproof inner bag is fixedly connected with the outer bag.

7. The landfill-specific container bag according to claim 6, characterized in that: The waterproof inner bag and the outer bag are bonded by double-sided adhesive.

8. The landfill container bag according to claim 7, characterized in that: The outer bag is sewn and fixed with the double-sided tape again.

9. The landfill container bag according to claim 8, characterized in that: The outer bag seam is provided with cotton strips and / or non-woven fabrics.

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

11. A construction method for landfilling garbage using the special container bag in the above claim, characterized in that: It includes the following steps: 1) Mix and heat garbage fly ash, water, chelating agent and curing agent to form a viscous liquid, i.e. garbage fly ash chelate; 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 garbage fly ash chelate is pumped through the discharge pipe to the landfill-specific container bag; 3) During the discharge process, when the bulk bag is filled with 60%-70%, pressure is applied to the bulk bag to make the garbage fly ash chelate flow evenly in the bulk bag, which is convenient for continued addition and prevents the area near the discharge pipe from being full while other places in the bag are empty; 4) If the current discharge port cannot continue to add material, and there is still spare capacity in the container bag, change the discharge port to continue adding material until the container bag is full.

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