Self-adaptive constant-pressure water inlet bypass filter device

Abstract

The invention discloses a self-adaptive constant-pressure water inlet side-filtration filtering device which comprises a pressure pump set, a pressure pump set water inlet main pipe, a pressure pump set water outlet main pipe and a pressure pump, the pressure pump set water inlet main pipe is connected with a side-filtration water outlet of a clean circulating water system return water upper tower main pipe, and the pressure pump set water inlet main pipe is connected with a side-filtration water outlet of the clean circulating water system return water upper tower main pipe; a water outlet main pipe of the pressure pump set is connected with a water inlet main pipe of the bypass filter set; the bypass filter group is used for filtering the water body and conveying the water body back to the water return upper tower main pipe of the clean circulating water system; and the base is used for mounting the pressure pump group and the bypass filter group. The device is skid-mounted and can be mounted on a bypass filter bypass of a water return upper tower main pipe of a clean circulating water system, the pressure of a water return pipeline is effectively utilized, the lift of a pressure pump of a bypass filter system is effectively reduced, and the equipment investment and energy consumption of the system are further reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of side filtration, and in particular relates to an adaptive constant pressure water inlet side filtration device. Background Art

[0002] In closed-loop circulating water systems using open cooling towers, dust and debris from the air enter the circulating water system during the cooling process. Routine chemical dosing also causes scale, rust, and microbial sludge to fall off and disperse, resulting in a large amount of suspended matter in the cooling water, causing water turbidity. Since these impurities have low solubility in water and can be removed by mechanical filtration, installing a bypass filter in the circulating water system can be very effective. Effective bypass filtration technology can comprehensively improve the quality of industrial circulating water, enhance system safety and economic efficiency, extend equipment life, reduce maintenance costs, and mitigate the risk of downtime. Bypass filtration technology generally diverts a portion of circulating water from the main circulating water pipeline and feeds it to a bypass filter. The filter then gradually circulates and captures impurities within the circulating water system through multiple cycles. Finally, necessary backwashing removes the captured impurities from the system. Common bypass filters include valveless filters, self-cleaning filters, shallow sand filters, and medium- and high-speed filters.

[0003] Table 1 Comparison of advantages and disadvantages of commonly used side filters

[0004]

[0005]

[0006] From the above comparison, it can be seen that the shallow sand filter is simple to install and operate, occupies a small area, has a high degree of automation, does not require external backwash water, the treatment effect meets the needs and the size is flexible. It is highly compatible with the bypass water volume of the metallurgical industry's clean loop system. It is reasonable to use it as a common equipment form in the metallurgical industry.

[0007] Typically, a bypass filter pump is used in engineering projects to extract and pressurize a portion of the circulating water from the circulating water intake well. The pressure head then overcomes the resistance of the filter media layer, filtering out suspended solids and colloidal impurities. The filtered water is then returned to the circulating water system, thereby purifying and controlling the suspended solids content in the water. The bypass filter water volume typically accounts for 5-10% of the total circulating water volume. Existing commonly used bypass filters, such as shallow sand filters, often require a minimum inlet pressure of no less than 0.20 MPa due to the equipment's tank height and requirements for overcoming resistance losses in the filter media layer. Therefore, the bypass filter pump head is typically selected to be 0.25-0.30 MPa to provide sufficient inlet head for the equipment and overcome pipeline resistance losses. Therefore, in existing projects, a separate bypass filter pump unit is typically installed within the circulating water pump room to pressurize the bypass filter water for filtration. If the circulating water system includes multiple independent clean water systems and clean water intake wells, multiple bypass filter pump units are required.

[0008] In the circulating cooling water systems of various industries, in order to ensure the safety and economy of the system operation, the bypass filter system is generally in continuous operation. For example, in the steel industry, a conventional medium-output steelmaking continuous casting plant has a demand for clean circulating cooling water of about 5000m 3 / h, then one set of filtration water volume is about 300m 3 / h bypass filter (set at 5% to 10% of the total circulating water volume), and configure the bypass water supply pump parameter with a single flow rate Q = 300m 3 / h, head H = 30m, power N = 45kW. It is advisable to select two pumps, one for use and one for backup. The pump room and the supporting suction well occupy an area of ​​about 5×30=150m 2 The initial investment in the pump equipment and pump house pool construction is approximately RMB 600,000. The electricity consumption is RMB 1,080 per day (calculated at RMB 1.00 per kWh for industrial electricity), and the annual electricity investment is approximately RMB 324,000 (calculated based on 7,200 working hours per year).

[0009] In view of this, it is necessary to explore ways to reduce the investment and operating costs of the bypass filtration system. Summary of the Invention

[0010] To solve the above problems, the present application provides an adaptive constant pressure water inlet bypass filtration device, comprising:

[0011] A booster pump group, comprising a booster pump group water inlet main pipe, a booster pump group water outlet main pipe and a booster pump, wherein the booster pump group water inlet main pipe is connected to the bypass filter outlet of the return water upper tower main pipe of the clean circulating water system, and the booster pump group water outlet main pipe is connected to the water inlet main pipe of the bypass filter group;

[0012] The side filter group is used to filter the water and transport it back to the main pipe of the return tower of the clean circulating water system;

[0013] Base, used to install the booster pump unit and bypass filter unit.

[0014] Optionally, the bypass filter group includes a bypass filter group water inlet main pipe, a bypass filter connected below the bypass filter group, and a bypass filter group water outlet main pipe.

[0015] Optionally, a pressure detection transmitter is provided on the water inlet main pipe of the bypass filter group, for detecting the water pressure of the water inlet main pipe of the bypass filter group in real time.

[0016] Optionally, the pressure detection transmitter is connected to the frequency converter of the booster pump, so as to control the rotation speed of the booster pump according to the water pressure on the water inlet main pipe of the bypass filter group detected by the pressure detection transmitter.

[0017] Optionally, it also includes a box body, which covers the bypass filter group and the pressure pump group.

[0018] Optionally, the water inlet main pipe of the booster pump group and the water outlet main pipe of the bypass filter group extend out of the box.

[0019] Optionally, the box is made of stainless steel.

[0020] Optionally, the pressure detection transmitter is a single crystal silicon resonant type with a measuring range of 0 to 0.6 MPa and an accuracy level of 1.0% FS.

[0021] Optionally, the water outlet main pipe of the booster pump group is arranged above the water inlet main pipe of the booster pump group.

[0022] Optionally, the by-pass filter is a shallow sand filter.

[0023] Compared with the prior art, this application has the following beneficial effects:

[0024] Comparison of technical solutions with previous clean loop bypass filter system settings:

[0025] The adaptive constant pressure water inlet bypass filtration device of the present application is skid-mounted and can be installed on the bypass filtration of the return water main tower of the clean ring water system, which effectively utilizes the return water pipeline pressure, effectively reduces the head of the booster pump of the bypass filtration system, and thus reduces the system equipment investment and energy consumption. The total investment in water pump equipment is reduced from 50,000 to about 30,000, and the equipment investment is reduced by 40%. The electricity consumption is reduced to ￥360 / day (calculated based on industrial electricity ￥1.00 / kWh), and the annual electricity cost is about 108,000 yuan (calculated based on 7,200 working hours per year), a reduction of 67%. When the clean ring return water pressure is stabilized at above 0.30MPa, the booster pump can be shut down directly.

[0026] In the adaptive constant pressure water inlet bypass filtration device of the present application, the bypass filter and the bypass filter booster pump are integrated on the same common base, with a short distance and less piping. In addition, the water inlet is pressurized and not self-priming. There is no need to arrange the bypass filter booster pump in the circulating water pump room and self-prime the water from the clean loop suction well, which reduces the length of the circulating water pump room and the clean loop suction well. The device can be installed at any location where the clean loop pressurized return water pipeline is connected. It does not need to be built near the clean loop cold water well, and the installation location is relatively flexible. It can also be installed on the top of the existing clean loop cold water well, effectively utilizing the free space on the top of the cold water well and reducing the additional land occupation. Therefore, the newly added pipeline booster pump body and supporting pipelines only occupy 1.80×2.21=4m2, compared with the traditional clean loop bypass filtration system that requires a self-priming horizontal pump and supporting water suction well, which occupies about 5×30=150m2, it can reduce the land occupation by 97%. The weight of a single water pump body is reduced from 700kg to 300kg, making it easy to disassemble and repair.

[0027] When setting up a traditional clean-loop bypass filter system, the bypass filter is often placed near the bypass filter booster pump for ease of placement. The water discharged from the bypass filter is then discharged into the clean-loop suction pool from the top of the bypass filter booster pump's suction port. This results in the bypass pump's suction port and the bypass filter's outlet being too close together, creating a short circuit and failing to effectively filter the entire clean-loop pool. This, in the long run, affects the pool's water quality. The adaptive constant-pressure water inlet bypass filter draws water from the bypass pipe of the clean-loop system's return main. Regardless of where the filtered water is discharged into the suction well, this prevents short circuits and improves filtration effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a plan view of the adaptive constant pressure water inlet bypass filtration device according to an embodiment of the present invention.

[0029] Figure 2 for Figure 1 AA section view. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] The adaptive constant pressure water inlet bypass filtration device of this embodiment integrates the traditional bypass filter and the bypass filter booster pump into an integrated device, and is installed on the bypass filter bypass of the return water tower main pipe of the clean circulating water system. The supporting electric control cabinet controls the filter filtration and backwashing, and the booster pump cooperates with the filter to control the constant pressure water inlet.

[0032] The adaptive constant pressure water inlet bypass filtration device of this embodiment includes a pressure pump group 600, a bypass filter group 400 and a base 500.

[0033] Among them, the booster pump group 600 includes a booster pump group water inlet main pipe 100, which is connected to the side filter outlet of the return water upper tower main pipe of the clean circulating water system, and is used to introduce the water body in the return water upper tower main pipe of the clean circulating water system into the booster pump group; the booster pump 200 is connected to the booster pump group water inlet main pipe 100, and is used to pressurize the water body and input it into the booster pump group water outlet main pipe 300; the booster pump group water outlet main pipe 300 is connected to the water inlet main pipe of the side filter group 400, and inputs water with a certain pressure into the side filter group 400.

[0034] The side filter group 400 is used to filter the water and transport it back to the main pipe of the return tower of the clean circulating water system.

[0035] The base 500 is used to install and support the pressure pump assembly 600 and the bypass filter assembly 400 .

[0036] The base 500 can be welded with steel sections, on which the pressure pump group 600 and the bypass filter group 400 can be installed in different areas. Figure 1 On the left side of the base 500 is the bypass filter group 400, and on the right side is the booster pump group 600. The bypass filter group 400 and the booster pump group 600 can be installed on the base 500 by welding or fasteners.

[0037] The booster pump group 600 includes a booster pump group water inlet main pipe 100, a booster pump 200, and a booster pump group water outlet main pipe 300. One end of the booster pump group water inlet main pipe 100 is connected to the bypass filter outlet of the return water tower main pipe of the clean water system, and the other end is connected to the water inlet of the booster pump 200. The booster pump group can have multiple booster pumps 200. According to the number of booster pumps included in the booster pump group, the booster pump group water inlet main pipe 100 branches out into multiple first branch pipes 110. Figure 1 In a system with two booster pumps, two first branch pipes 110 branch from the booster pump assembly's main water inlet pipe 100, each connected to the water inlet of a corresponding booster pump 200. Water entering the booster pump 200 is pressurized to a specific pressure. The specific type of booster pump 200 is conventional and will not be described in detail here.

[0038] The booster pump 200 may be a pipeline booster pump, or may be, for example, an IS-type vertical single-stage single-suction pump, an S-type single-stage double-suction pump, or the like.

[0039] The booster pump assembly outlet manifold 300 is located above the booster pump assembly inlet manifold 100. One end is connected to the bypass filter assembly inlet manifold. Multiple secondary branch pipes 310 branch from this manifold, each connected to the corresponding booster pump outlets. Pressurized water enters the booster pump assembly outlet manifold 300 and then flows into the bypass filter assembly inlet manifold.

[0040] The bypass filter assembly 400 includes a bypass filter assembly water inlet manifold 410 and a bypass filter 420 connected thereto. Multiple third branch pipes 411 branch from the bypass filter assembly water inlet manifold 410, each of which connects to the water inlet of a corresponding bypass filter 420. The bypass filter 420 filters the incoming water, removing suspended matter such as scale, rust, and microbial sludge, thereby reducing the turbidity of the water.

[0041] The side filter group 400 may include a plurality of side filters 420, such as Figure 2 In the example, three bypass filters 420 are used. Correspondingly, three third branch pipes 411 branch from the bypass filter group water inlet main pipe 410 and connect to the water inlets of the corresponding bypass filters 420. The bypass filters 420 have at least filtering and backwashing functions. Preferably, the bypass filters 420 can be shallow sand filters, but this application also includes the possibility of using other filters.

[0042] The water outlet of the side filter 420 is connected to the side filter group water outlet main pipe 430, and the side filter group water outlet main pipe 430 is connected to the side filter inlet of the return water upper tower main pipe of the clean circulating water system, returning the filtered water to the return water upper tower main pipe of the clean circulating water system.

[0043] In some embodiments, a pressure transmitter 413 is provided on the bypass filter assembly water inlet manifold 410 for real-time monitoring of the water pressure in the bypass filter assembly water inlet manifold 410. Exemplarily, pressure transmitter 413 may be a single crystal silicon resonant type transmitter with a range of 0 to 0.6 MPa and an accuracy level of 1.0% FS.

[0044] Furthermore, a controller is included, and the pressure detection transmitter 413 is connected to the controller for transmitting the pressure signal to the controller. The controller is also connected to the frequency converter of the pressure pump 200, so as to control the speed of the pressure pump 200 and thus the output water volume of the pressure pump 200.

[0045] Specifically, when the bypass filtration device is in operation, it first transmits a water pressure signal detected at the filter group's water inlet manifold 410 to a controller. The controller compares this pressure signal with a preset filter group water inlet pressure setpoint (e.g., 0.30 MPa). Based on the comparison result, the controller controls the pipeline booster pump's frequency converter, thereby controlling the pump's speed to control the pump's water output. When the pressure in the filter group's water inlet manifold 410 falls below the setpoint, the controller increases the booster pump's water output; when the pressure in the filter group's water inlet manifold 410 rises above the setpoint, the controller decreases the pump's water output. For example, if the pressure signal is 0.2 MPa, the controller increases the pump's speed, thereby increasing its water output. For example, if the pressure signal is 0.4 MPa, the controller decreases the pump's speed, thereby reducing its water output.

[0046] By continuously adjusting the output water volume of the booster pump, the water inlet pressure of the filter can be kept within the set pressure range, achieving the purpose of constant pressure water inlet to the filter. As it is skid-mounted, the entire device is very easy to arrange in the desired location.

[0047] In some embodiments, a housing is further included, which houses the bypass filter assembly 400 and the booster pump assembly 600. The booster pump assembly water inlet manifold 100 and the bypass filter assembly water outlet manifold 430 can extend out of the housing to facilitate connection between the booster pump assembly water inlet manifold 100 and the bypass filter outlet of the return water upper tower manifold of the clean water system, and the bypass filter assembly water outlet manifold 430 is connected to the bypass filter inlet of the return water upper tower manifold of the clean water system. A door can be provided on the housing to facilitate access for personnel to operate the bypass filter assembly 400 and the booster pump assembly 600. The housing can be made of stainless steel, or other metal or non-metal materials.

[0048] Preferably, the adaptive constant pressure water inlet bypass filtration device can be installed on the bypass filtration of the return water tower main pipe of the clean circulating water system. In this way, the residual pressure of the return water tower main pipe can be fully utilized, and the head of the booster pump can be effectively reduced, thereby greatly reducing the energy consumption of the system booster pump and realizing green and energy-saving intelligent management.

[0049] Taking the above-mentioned clean loop bypass filter system setting conditions as a comparison, the filtered water volume of this embodiment is selected as Q=300m 3 / h adaptive constant pressure water inlet bypass filter device, and install it on the bypass filter of the main pipe of the clean water system return water tower. The clean water return pressure before the tower is generally at least 0.20MPa, which can be used as the back pressure of the booster pump. The pump parameter is flow rate Q = 300m 3 / h, lift H = 5 ~ 10m, power N = 15kW, the system energy consumption is effectively reduced, and the land occupation and equipment construction investment are reduced.

[0050] The present invention is a bypass filter that uses adaptive constant pressure water inlet control technology and is installed on the bypass filter of the return water tower main pipe of the clean water system. An integrated design is adopted to integrate the bypass filter and the bypass filter booster pump. The inlet pressure can be adjusted in real time according to the actual operating pressure of the installation pipeline to meet the filter inlet pressure requirement. This equipment can directly save the space occupied by the pump room and water pool of the separate bypass water supply pump group, as well as the one-time investment in equipment and civil engineering. At the same time, it can effectively utilize the return water pipeline pressure and reduce the power consumption of the booster pump. With the above 5000m 3 Taking the side filtration system with a circulating water volume of / h as an example, the one-time investment can be reduced by about RMB 600,000 and the land area can be reduced by 150m 2 , reducing electricity consumption by up to 216,000 yuan per year.

[0051] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications shall fall within the scope of protection of the claims of the present invention.

Claims

1. An adaptive constant pressure water inlet bypass filtration device, characterized in that: include: A booster pump group, comprising a booster pump group water inlet main pipe, a booster pump group water outlet main pipe and a booster pump, wherein the booster pump group water inlet main pipe is connected to the bypass filter water outlet of the return water upper tower main pipe of the clean circulating water system, and the booster pump group water outlet main pipe is connected to the bypass filter group water inlet main pipe; The side filter group is used to filter the water and transport it back to the main pipe of the return tower of the clean circulating water system; Base, used to install the booster pump group and the bypass filter group.

2. The adaptive constant pressure water inlet bypass filtration device according to claim 1 is characterized in that: The side filter group comprises a water inlet main pipe of the side filter group, a side filter connected below the side filter group, and a water outlet main pipe of the side filter group.

3. The adaptive constant pressure water inlet bypass filtration device according to claim 2 is characterized in that: A pressure detection transmitter is arranged on the water inlet main pipe of the bypass filter group, which is used to detect the water pressure of the water inlet main pipe of the bypass filter group in real time.

4. The adaptive constant pressure water inlet bypass filtration device according to claim 3 is characterized in that: The pressure detection transmitter is connected to the frequency converter of the pressure pump, so as to control the rotation speed of the pressure pump according to the water pressure on the water inlet main pipe of the bypass filter group detected by the pressure detection transmitter.

5. The adaptive constant pressure water inlet bypass filtration device according to claim 1 is characterized in that: It also includes a box body, which covers the bypass filter group and the pressure pump group.

6. The adaptive constant pressure water inlet bypass filtration device according to claim 5, characterized in that: The water inlet main pipe of the booster pump group and the water outlet main pipe of the bypass filter group extend out of the box body.

7. The adaptive constant pressure water inlet bypass filtration device according to claim 5, characterized in that: The box body is made of stainless steel.

8. The adaptive constant pressure water inlet bypass filtration device according to claim 2, characterized in that: The pressure detection transmitter is of single crystal silicon resonance type, with a measuring range of 0 to 0.6 MPa and an accuracy level of 1.0% FS.

9. The adaptive constant pressure water inlet bypass filtration device according to claim 2, characterized in that: The main water outlet pipe of the booster pump group is arranged above the main water inlet pipe of the booster pump group.

10. The adaptive constant pressure water inlet bypass filtration device according to claim 2, characterized in that: The by-pass filter is a shallow sand filter.

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