A water cutting system

Abstract

The utility model discloses a kind of cut granule water systems, for processing cut granule water from cut granule system, the cut granule water system includes cut granule water tank, cut granule water pump unit and cut granule water filtration unit connected in turn;Overflow filter unit is arranged between the outlet of the cut granule system and the inlet of the cut granule water tank, for filtering particle and fine powder in cut granule water;The cut granule water tank is integrated structure, its inlet is connected to the outlet of the overflow filter, for storing filtered cut granule water.The cut granule water system provided by the utility model, by adding overflow filter in water inlet end, and water tank is optimized to integrated structure, realizes from source filtering fine powder to prevent blockage, simplifies equipment and reduces power consumption, and eliminates the effect of particulate matter emission.

Description

Technical Field

[0001] This utility model relates to the field of polymer material processing equipment technology, and in particular to a structurally optimized pelletizing water system. Background Technology

[0002] In the extrusion granulation process of polymer materials (such as polypropylene), after the molten polymer is extruded and pelletized by an extruder, it needs to be cooled, transported, and separated through a pelletizing water system, and the cooled pelletizing water is recycled. Existing pelletizing water systems typically include components such as pelletizing water tanks, water pumps, filters, and heat exchangers.

[0003] Currently, in this system, the pelletizing water from the pelletizing system enters the pelletizing water tank directly after being separated from the pellets without being adequately filtered. This results in fine particles and powder (fine dust) carried in the water entering the system circulation. This fine dust causes frequent clogging of the pelletizing water filter located after the water tank. Because the filter screen inside this main filter is large and heavy, and the installation space is limited, disassembly and cleaning are labor-intensive, easily leading to injuries from bumps and scrapes, and also easily damaging the filter screen, increasing maintenance costs.

[0004] Due to inadequate pre-filtration, some fine powder can penetrate the entire system and eventually enter the granular material silo along with the polypropylene particles. This fine powder is discharged through the vents at the top of the silo, which can easily cause particulate matter emissions to exceed standards, pollute the environment, and potentially violate environmental regulations.

[0005] Furthermore, in terms of system structure, existing pelletizing tanks typically consist of two tanks, one large and one small, with water circulating between them via a single circulating pump. This design not only requires a large footprint, but the continuous operation of the circulating pump also leads to additional energy consumption.

[0006] Therefore, providing a pelletizing water system that can effectively solve filter clogging, reduce energy consumption, and reduce emissions has become an urgent technical problem to be solved in this field. Summary of the Invention

[0007] In view of the above-mentioned shortcomings of the existing technology in this field, the present invention provides a pelletizing water system. This system achieves the effects of filtering fine powder from the source to prevent clogging, simplifying equipment to reduce power consumption, and eliminating particulate matter emissions by adding an overflow filter at the water inlet and optimizing the water tank into an integrated structure.

[0008] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: A pelletizing water system for treating pelletizing water from a pelletizing system, the pelletizing water system comprising a pelletizing water tank, a pelletizing water pump unit, and a pelletizing water filtration unit connected in sequence; An overflow filter unit is provided between the outlet of the pelletizing system and the inlet of the pelletizing water tank to filter particles and fine powder in the pelletizing water. The pelletizing water tank is an integrated structure, with its inlet connected to the outlet of the overflow filter, for storing filtered pelletized water.

[0009] According to one aspect of the present invention, the overflow filtration unit includes at least one set of overflow filters, which separate particles and fine powder in granulated water by overflow. When there are multiple sets of overflow filters, the multiple sets of overflow filters are arranged in series or in parallel.

[0010] According to one aspect of the present invention, the overflow filter is provided with a drain outlet, the drain outlet is connected to a ditch through a drain pipe, and a ball valve is provided on the drain pipe.

[0011] According to one aspect of the present invention, the pelletizing water tank is provided with an overflow port and a drain port. The overflow port is located at the top of the pelletizing water tank and is directly connected to a ditch through an overflow pipe. The drain port is connected to the ditch through a drain pipe and a ball valve is provided on the drain pipe.

[0012] According to one aspect of the present invention, the pelletizing water pump unit includes at least one set of pelletizing water pumps, the inlet of the pelletizing water pumps is connected to the outlet of the pelletizing water tank through a pipe, and a gate valve is provided on the pipe. When there are multiple sets of pelletizing water pumps, the multiple sets of pelletizing water pumps are arranged in parallel.

[0013] According to one aspect of the present invention, the pelletized water filtration unit includes at least one set of pelletized water filters. The inlet of the pelletized water filter is connected to the outlet of the pelletized water tank through a pipe. The pipe is equipped with a gate valve and a check valve. When there are multiple sets of pelletized water filters, the multiple sets of pelletized water filters are connected in series or in parallel.

[0014] According to one aspect of the present invention, the pelletizing water system further includes a heat exchanger, the inlet of which is connected to the outlet of the pelletizing water filtration unit via a pipe, a gate valve being provided on the pipe, and the outlet of the heat exchanger being connected to the pelletizing system and the pelletizing water tank via a three-way gate valve.

[0015] According to one aspect of the present invention, the pelletizing water system further includes a demineralized water filter, the inlet of which is connected to an external demineralized water supply system via a demineralized water supply pipe, and the outlet of which is connected to the pelletizing water tank via a pipe.

[0016] According to one aspect of the present invention, the pelletizing water system further includes a steam filter, the inlet of which is connected to an external low-pressure steam supply system via a steam supply pipe, and the outlet of which is connected to the pelletizing water tank via a pipe.

[0017] According to one aspect of the present invention, a guide plate is provided inside the pelletizing water tank to optimize the hydraulic conditions inside the tank, prevent water flow short circuits and eddies, and ensure that the pelletized water is evenly distributed and fully settles.

[0018] The advantages of this invention are as follows: First, by installing an overflow filter before the water tank, most particulate matter and fine powder are intercepted before entering the water tank, greatly reducing the filtration load on the downstream pelletizing water filter, significantly reducing its clogging frequency, and extending the cleaning cycle and service life. Second, due to the reduced clogging of the main filter, its disassembly and cleaning frequency is greatly reduced, which not only reduces maintenance workload and management costs, but also fundamentally reduces the risk of injury from frequent disassembly and assembly of heavy filter screens in confined spaces and the probability of filter screen damage. Third, by integrating multiple water tanks into one integrated water tank and eliminating the circulating water pump between the water tanks, the system structure is simplified, the equipment footprint is reduced, and the system's power consumption is reduced. Fourth, the pre-filtration ensures that fine powder is effectively removed, preventing fine powder from entering the hopper with particles and escaping from the top discharge port, thereby solving the problem of excessive particulate matter emissions and contributing to environmental protection and compliant production. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a pelletizing water system according to the present invention. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Figure 1 A schematic diagram of a pelletizing water system according to the present invention is shown. This system is used to treat pelletizing water from a pelletizing system. Figure 1 As shown, the pelletizing water system includes a pelletizing water tank 100, a pelletizing water pump unit 101, and a pelletizing water filter unit 102 connected in sequence.

[0023] In order to fully filter impurities from the pelletizing water discharged from the pelletizing system, in this embodiment of the invention, an overflow filter unit is provided between the pelletizing water outlet 200 of the pelletizing system and the inlet of the pelletizing water tank 100 to filter particles and fine powder in the pelletizing water.

[0024] In addition, in this embodiment of the present invention, the pelletizing water tank 100 is an integral structure, and its inlet is connected to the outlet of the overflow unit for storing filtered pelletized water.

[0025] The overflow filtration unit includes at least one set of overflow filters, which are of an overflow structure and used to separate particles and fine powder by overflow. In this embodiment of the present invention, the overflow filtration unit includes a first overflow filter 103 and a second overflow filter 104, wherein the first overflow filter 103 and the second overflow filter 104 are arranged in parallel to achieve alternating or simultaneous operation.

[0026] It is understood that both the first overflow filter 103 and the second overflow filter 104 are provided with drain ports at their bottoms, and the drain ports are connected to the trench 300 through drain pipes. The drain pipes are equipped with ball valves to facilitate regular cleaning of the internal residues of the overflow filters.

[0027] The pelletizing water tank 100 adopts an integrated structure, replacing the original dual-tank configuration. It combines two independent tanks into a single large-capacity tank. Internally, a baffle plate optimizes hydraulic conditions, preventing short circuits and eddies, achieving uniform water flow distribution and effective buffering to ensure sufficient settling and stable supply of pelletized water within the tank. Furthermore, this integrated design eliminates the water pump previously used for circulation balancing between the two tanks, simplifying the process, reducing the number of equipment and floor space required, and lowering energy consumption and maintenance costs.

[0028] It is understandable that the pelletizing tank 100 is equipped with an overflow port at the top and a drain port at the bottom. The overflow port is directly connected to the trench 300 through an overflow pipe; the drain port is connected to the trench 300 through a drain pipe. The drain pipe is equipped with a gate valve to facilitate the regular cleaning of residues inside the pelletizing tank 100.

[0029] The pelletizing pump unit 101 includes at least one set of pelletizing pumps. The inlet of each pelletizing pump is connected to the outlet of the pelletizing tank 100 via a pipe, and a gate valve is installed on the pipe. In this embodiment of the invention, the pelletizing pump unit 101 includes a first pelletizing pump 105 and a second pelletizing pump 106, wherein the first pelletizing pump 105 and the second pelletizing pump 106 are connected in parallel to achieve alternating or simultaneous operation.

[0030] The pelletizing water filtration unit 102 includes at least one set of pelletizing water filters. The inlet of the pelletizing water filter is connected to the outlet of the pelletizing water pump via a pipe, and a gate valve and a check valve are installed on the pipe. In this embodiment of the present invention, the pelletizing water filtration unit 102 includes a first pelletizing water filter 107 and a second pelletizing water filter 108. The first pelletizing water filter 107 and the second pelletizing water filter 108 are arranged in parallel to achieve alternating or simultaneous operation.

[0031] It should be noted that the number and arrangement of overflow filters in the overflow filtration unit and the number and arrangement of granulated water filters in the granulated water filtration unit 102 can be flexibly selected according to the filtration effect and system requirements. Multiple overflow filters and multiple granulated water filters can also be connected in series in a collaborative working mode to improve the filtration effect through multi-stage filtration; this utility model does not impose any special limitations on either.

[0032] The pelletizing water system of this utility model also includes a heat exchanger 109. The outlets of the pelletizing water filters (including the first pelletizing water filter 107 and the second pelletizing water filter 108) in the pelletizing water filtration unit are connected to the inlet of the heat exchanger 109 via pipes. The outlet of the heat exchanger 109 is connected to the pelletizing system 400 and the pelletizing water tank 100 via pipes to realize the recycling of pelletizing water. A three-way gate valve is installed at the junction of the pipes connecting the pelletizing system 400 and the pelletizing water tank 100 in the heat exchanger 109.

[0033] The water flowing out of the pelletizing water filter is clean pelletizing water that has undergone fine filtration. Its temperature is regulated by heat exchanger 109 to meet the requirements of the pelletizing process. The filtered clean pelletizing water can be sent to the pelletizing head of the pelletizing system 400 through a three-way gate valve for reuse in pelletizing and cooling, realizing the recycling of water resources; alternatively, the pelletizing water can be sent to the pelletizing water tank 100 to regulate its water level.

[0034] The pelletizing water system of this utility model also includes a demineralized water filter 110. The inlet of the demineralized water filter 110 is connected to an external demineralized water supply system 500 through a demineralized water supply pipe to receive the demineralized water to be purified delivered from the outside. The outlet of the demineralized water filter 110 is connected to the pelletizing water tank 100 of the pelletizing water system through a pipe.

[0035] Although the externally input desalinated water undergoes external desalination treatment, it may still contain trace amounts of suspended solids, colloidal particles, or pipe corrosion debris. The desalinated water filter 110 uses an internal precision filtration structure to trap these residual impurities, preventing them from entering the pelletizing tank 100 with the desalinated water.

[0036] The pelletizing water system of this utility model also includes a steam filter 111. The inlet of the steam filter 111 is connected to an external low-pressure steam supply system 600 through a steam supply pipe to receive low-pressure steam to be purified. The outlet of the steam filter 111 is connected to the pelletizing water tank 100 of the pelletizing water system through a pipe.

[0037] During the transportation of low-pressure steam through the factory's pipeline network, it is easy to carry solid contaminants such as boiler scale particles, pipe corrosion debris, and wear impurities from valve seals. The steam filter 111 uses an internal high-precision filter screen to trap these impurities and prevent them from entering the pelletizing tank 100 with the steam.

[0038] In this invention, the pelletizing water flows within an optimized closed-loop circulation system. The flow direction can be summarized as follows: starting from the pelletizing system, passing through source filtration, buffer storage, precision filtration, and temperature regulation, before returning to the pelletizing system, forming a highly efficient and energy-saving closed loop. The specific processing flow is as follows: Step 1: Input water for pelleting; The pelletizing water carrying impurities flows out of the pelletizing system. At this time, the water contains a large number of polypropylene particles and fine powder, and the temperature is relatively high.

[0039] Step 2: Filter the granulated water at the source; The pelletized water first enters a parallel overflow filter for source filtration. The vast majority of solid particles and fine powder are retained here, and the filtered clean water overflows into the next stage. This fundamentally reduces the burden on subsequent systems. Step 3: Buffering and storing the water from pelletizing; The pre-filtered pelletized water enters an integrated pelletizing tank. This tank replaces the original dual tanks of different sizes, and its internal flow can be optimized via baffles. The water flow is buffered, homogenized, and temporarily stored here, while any extremely fine particles that may remain in the water are further settled. Step 4: Perform precision filtration on the pelletized water; The pelletizing pump draws water from the tank, powering the entire circulation process. The pressurized water is then sent to the pelletizing water filter. Since most impurities have already been removed at the source, this section performs fine filtration to ensure the final purity of the water.

[0040] Step 5: Temperature adjustment and reuse of the treated pelletizing water.

[0041] The finely filtered pellet water enters the heat exchanger, where it is precisely heated or cooled to the optimal temperature according to process requirements.

[0042] After the above treatment, the appropriately heated and clean pelletizing water is transported back to the pelletizing system and reused in the pelletizing and cooling process of the polymer, or the water level in the pelletizing water tank is adjusted to start a new cycle.

[0043] The advantages of this invention are as follows: First, by installing an overflow filter before the water tank, most particulate matter and fine powder are intercepted before entering the water tank, greatly reducing the filtration load on the downstream pelletizing water filter, significantly reducing its clogging frequency, and extending the cleaning cycle and service life. Second, due to the reduced clogging of the main filter, its disassembly and cleaning frequency is greatly reduced, which not only reduces maintenance workload and management costs, but also fundamentally reduces the risk of injury from frequent disassembly and assembly of heavy filter screens in confined spaces and the probability of filter screen damage. Third, by integrating multiple water tanks into one integrated water tank and eliminating the circulating water pump between the water tanks, the system structure is simplified, the equipment footprint is reduced, and the system's power consumption is reduced. Fourth, the pre-filtration ensures that fine powder is effectively removed, preventing fine powder from entering the hopper with particles and escaping from the top discharge port, thereby solving the problem of excessive particulate matter emissions and contributing to environmental protection and compliant production.

[0044] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pelletizing water system for treating pelletizing water from a pelletizing system, the pelletizing water system comprising a pelletizing water tank, a pelletizing water pump unit, and a pelletizing water filtration unit connected in sequence, characterized in that: An overflow filter unit is provided between the outlet of the pelletizing system and the inlet of the pelletizing water tank to filter particles and fine powder in the pelletizing water. The pelletizing water tank is an integrated structure, with its inlet connected to the outlet of the overflow filtration unit, for storing filtered pelletized water.

2. The pelletizing water system according to claim 1, characterized in that, The overflow filtration unit includes at least one set of overflow filters, which separate particles and fine powder in the granulated water by overflow. When there are multiple sets of overflow filters, the multiple sets of overflow filters are connected in series or in parallel.

3. The pelletizing water system according to claim 2, characterized in that, The overflow filter is provided with a drain outlet, which is connected to the ditch through a drain pipe, and a ball valve is installed on the drain pipe.

4. The pelletizing water system according to claim 1, characterized in that, The pelletizing tank is equipped with an overflow outlet and a drain outlet. The overflow outlet is located at the top of the pelletizing tank and is directly connected to the ditch through an overflow pipe. The drain outlet is connected to the ditch through a drain pipe and is equipped with a ball valve.

5. The pelletizing water system according to claim 1, characterized in that, The pelletizing water pump unit includes at least one set of pelletizing water pumps. The inlet of the pelletizing water pump is connected to the outlet of the pelletizing water tank through a pipe. A gate valve is installed on the pipe. When there are multiple sets of pelletizing water pumps, the multiple sets of pelletizing water pumps are connected in parallel.

6. The pelletizing water system according to claim 1, characterized in that, The pelletized water filtration unit includes at least one set of pelletized water filters. The inlet of the pelletized water filter is connected to the outlet of the pelletized water tank through a pipe. The pipe is equipped with a gate valve and a check valve. When there are multiple sets of pelletized water filters, the multiple sets of pelletized water filters are connected in series or in parallel.

7. The pelletizing water system according to claim 1, characterized in that, The pelletizing water system also includes a heat exchanger. The inlet of the heat exchanger is connected to the outlet of the pelletizing water filtration unit via a pipe. A gate valve is installed on the pipe. The outlet of the heat exchanger is connected to the pelletizing system and the pelletizing water tank via a three-way gate valve.

8. The pelletizing water system according to claim 1, characterized in that, The pelletizing water system also includes a demineralized water filter. The inlet of the demineralized water filter is connected to an external demineralized water supply system through a demineralized water supply pipe, and the outlet of the demineralized water filter is connected to the pelletizing water tank through a pipe.

9. The pelletizing water system according to claim 1, characterized in that, The pelletizing water system also includes a steam filter. The inlet of the steam filter is connected to an external low-pressure steam supply system via a steam supply pipe, and the outlet of the steam filter is connected to the pelletizing water tank via a pipe.

10. The pelletizing water system according to any one of claims 1 to 9, characterized in that, The pelletizing tank is equipped with a baffle plate to optimize the hydraulic conditions inside the tank, prevent short circuits and eddies in the water flow, and ensure that the pelletizing water is evenly distributed and settles fully.

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