Energy-saving ceramic membrane equipment

Abstract

The invention relates to energy-saving ceramic membrane equipment, and belongs to the technical field of ceramic membrane equipment. Comprising a circulating pump and at least three sections of ceramic membrane filtering units, the sections are connected in series, and the ceramic membrane filtering unit in each section comprises a plurality of ceramic membrane assemblies which are connected in parallel; in the direction from the feed liquid inlet to the feed liquid outlet, the number of the ceramic membrane components in the previous section of the ceramic membrane filtering unit is greater than that of the ceramic membrane components in the next section of the ceramic membrane filtering unit; the ceramic membranes in the ceramic membrane assembly are tubular, the parallel connection structure refers to that raw material liquid side pipelines of the ceramic membranes are connected in parallel, and the series connection structure refers to that the raw material liquid side pipelines of the ceramic membranes are connected in series; and the circulating pump is connected with the feed liquid inlet of the ceramic membrane filtering unit at the first section.

Description

Technical Field

[0001] The invention relates to energy-saving ceramic membrane equipment, and belongs to the technical field of ceramic membrane equipment. Background Art

[0002] At present, conventional ceramic membrane equipment such as Figure 1 As shown in , conventional ceramic membrane equipment design generally includes 6 or 8 ceramic membrane components, a feed pump, and a circulation pump. The 6 or 8 ceramic membrane components are divided into 2 sections, 3 or 4 in each section are connected in parallel, and the two sections are connected in series. The connection method is three in parallel and two in series or four in parallel and two in series. A filtration pipeline is formed between the two sections, and a circulation pipeline is connected between the inlet and outlet of the filtration pipeline. A feed pipeline where the feed pump is located is connected to the circulation pipeline, and the outlet of the filtration pipeline is connected to the discharge pipeline. The permeate outlet of the ceramic membrane component is connected to the permeate main pipe.

[0003] When the membrane equipment is working, the material is first transported from the material tank into the circulation pump through the feed pump, and then transported to each ceramic membrane component by the circulation pump. The permeate of the ceramic membrane is transported from the permeate main pipe to the clear liquid collection tank. The filtered liquid is repeatedly transported to each ceramic membrane component through the feed pump and the circulation pump for filtration, and the filtration pipeline discharges the filtered liquid from the discharge pipe.

[0004] Figure 1 Conventional ceramic membrane equipment in the industry uses a feed pump and a circulation pump to inject liquid into the ceramic membrane assembly. To reduce the contamination of the ceramic membrane by the liquid, the membrane surface flow rate needs to be maintained. In the past, with this connection, the circulation pump needed to evenly distribute the flow to four or five components when working. To maintain the membrane surface flow rate, Figure 1 The circulating pump and feeding pump with large flow rate are configured in the equipment. The circulating pump and feeding pump with large flow rate result in large equipment power, high operating cost and large investment in pumps.

[0005] Take the commonly used 91 core * 10 component ceramic membrane equipment as an example: the design operation mode is five parallel and two series, the equipment is equipped with one feed pump, the parameter is Q = 180m 3 / h, H = 30m, P = 30kw; configure 1 circulating pump, parameter is Q = 1600m 3 / h, H=28m, P=200kw; total power is: 30+200=230kw. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to solve the defects of conventional ceramic membrane equipment such as large floor space occupation, high investment and high operating energy consumption.

[0007] An energy-saving ceramic membrane device comprises: a circulation pump, and at least three sections of ceramic membrane filtration units, each section being a series structure, and each section of the ceramic membrane filtration unit comprising a plurality of ceramic membrane assemblies connected in parallel;

[0008] And along the direction from the feed liquid inlet to the outlet, the number of ceramic membrane assemblies in the ceramic membrane filtration unit of the upper section is greater than the number of ceramic membrane assemblies in the ceramic membrane filtration unit of the lower section;

[0009] The ceramic membrane in the ceramic membrane assembly is tubular, the parallel structure means that the raw liquid side pipelines of the ceramic membrane are connected in parallel, and the series structure means that the raw liquid side pipelines of the ceramic membrane are connected in series;

[0010] The circulation pump is connected to the liquid inlet of the ceramic membrane filtration unit of the first section.

[0011] The total number of ceramic membrane components in the energy-saving ceramic membrane equipment is greater than 8.

[0012] The number of ceramic membrane assemblies in the ceramic membrane filtration unit of the first section is at least 4.

[0013] Each section of the ceramic membrane filtration unit includes an inlet header and an outlet header, and the inlet and outlet of the ceramic membrane assembly are respectively connected to the inlet header and the outlet header; and along the direction from the feed inlet to the outlet, the outlet header of the ceramic membrane filtration unit of the previous section is connected to the inlet header of the ceramic membrane filtration unit of the next section.

[0014] The number of the ceramic membrane filtration units is three, and along the direction from the feed liquid inlet to the outlet, the number of ceramic membrane components in the three sections of the ceramic membrane filtration units is 4-8, 3-7, and 2-6 respectively.

[0015] The ceramic membrane in the ceramic membrane assembly is of single-tube type or multi-channel type.

[0016] Beneficial effects

[0017] This new energy-saving ceramic membrane device utilizes a membrane assembly designed into at least three sections, with each section containing a decreasing number of modules. These modules are connected in series via pipes to form a filtration circuit. Compared to conventional ceramic membrane devices, this device not only effectively increases the membrane area, reducing floor space, but also reduces operating energy consumption and costs. Furthermore, by reducing the number of modules in each section, the device also increases the flow rate across the membrane surface in subsequent sections, thereby improving treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of existing ceramic membrane equipment;

[0019] Figure 2 It is a schematic diagram of energy-saving ceramic membrane equipment (5-4-3 type);

[0020] Figure 3 It is a schematic diagram of energy-saving ceramic membrane equipment (6-5-4 type);

[0021] 11. First section membrane assembly; 12. Second section membrane assembly; 13. Third section membrane assembly;

[0022] 21. First inlet manifold; 22. First outlet manifold; 23. Second inlet manifold; 22. Second outlet manifold; 24. Third inlet manifold; 25. Third outlet manifold;

[0023] 3. Circulation pump; DETAILED DESCRIPTION

[0024] like Figure 2 As shown, a new type of energy-saving ceramic membrane equipment (5-4-3 type) includes 12 ceramic membrane modules. The 12 ceramic membrane modules on the filter pipeline are divided into three sections. The first five ceramic membrane modules are one section (connected in series with each other), the middle five ceramic membrane modules are two sections (connected in series with each other), and the last four ceramic membrane modules are three sections (connected in series with each other). The ceramic membrane modules of each section are connected in series through pipes to form a filter pipeline. The inlet of the filter pipeline is connected to the feed pump and the circulation pump (the pump is not shown in the figure). The outlet of the feed pump is connected to the inlet of the circulation pump, and a bifurcation is designed at the outlet end of the last section of the ceramic membrane module. One path returns to the material tank, forming an external loop; the other path is connected to the inlet of the circulation pump, forming an internal loop.

[0025] In the figure, the outlet of the circulation pump is connected to the first inlet manifold 21, and there are 5 components in parallel on the first inlet manifold 21. These 5 components are tubular or multi-channel components, and their outlets on the feed liquid side are all connected to the first outlet manifold 22; the first outlet manifold 22 is then connected to the second inlet manifold 23, and there are 4 components in parallel on the second inlet manifold 23. These 4 components are tubular or multi-channel components, and their outlets on the feed liquid side are all connected to the second outlet manifold 24; the second outlet manifold 24 is then connected to the third inlet manifold 25, and there are 3 components in parallel on the third inlet manifold 25. These 3 components are tubular or multi-channel components, and their outlets on the feed liquid side are all connected to the third outlet manifold 26.

[0026] The number of ceramic membrane components on the filter pipeline can also be 9 (4-3-2 type), 15 (6-5-4 type), 14 (5-4-3-2 type) or more. The user can freely choose the number of ceramic membrane components on the filter pipeline and the number of groups according to actual conditions.

[0027] The circulation line is equipped with an exhaust valve at the top, which is connected to the exhaust pipe. The exhaust pipe is opened when the equipment is just starting to operate, and is closed when the internal gas of the equipment is emptied and filled with materials to ensure the safe operation of the entire equipment.

[0028] When the ceramic membrane equipment is operating, the material is pumped into the circulation pipeline by the feed pump. The liquid is then pumped into the filtration pipeline by the circulation pump, entering the first section of the ceramic membrane assembly, and then passing through the second and third sections of the ceramic membrane assembly in sequence. The majority of the liquid then continues to be circulated and filtered through the circulation pump, while a small amount returns to the material tank or is discharged. The clear liquid from each section of the ceramic membrane is first collected, and then the clear liquid from the three sections is collected, and finally enters the ceramic membrane clear tank through the permeate main pipe.

[0029] The two auxiliary feed pipes 3 are respectively connected to the pipes in the front and rear groups of ceramic membrane assemblies, and the feed pumps on the two auxiliary feed pipes 3 are used to supplement the intermediate material for the entire filtration pipeline, thereby compensating for the defects of low membrane surface flow rate and insufficient pressure in the rear passage of the 8 ceramic membrane assemblies 1 connected in series. Now the membrane surface flow rate and pressure in the rear passage of the filtration pipeline are provided by the feed pumps of the two auxiliary feed pipes 3, and the flow rate and pressure of the entire filtration pipeline are guaranteed.

[0030] Take the ceramic membrane device with 91 cores and 12 modules as an example: Figure 2 The equipment is designed for a three-stage operation mode. This three-stage design of decreasing membrane components addresses the high energy consumption and high investment associated with the 6-parallel, 2-series operation mode, thereby reducing energy consumption and operating costs. The equipment is equipped with one feed pump with parameters of Q = 180 m³ / h, H = 30 m³, and P = 30 kW; and one circulation pump with parameters of Q = 1600 m³ / h, H = 28 m³, and P = 200 kW. The total power is: 30 + 200 = 230 kW. This shows that the ceramic membrane equipment of this invention reduces the power of both the feed pump and the circulation pump, reducing costs and energy consumption.

Claims

1. An energy-saving ceramic membrane device, characterized in that: include: A circulation pump and at least three sections of ceramic membrane filtration units, each section being a series structure, and each section of the ceramic membrane filtration unit comprising a plurality of ceramic membrane assemblies connected in parallel; And along the direction from the feed liquid inlet to the outlet, the number of ceramic membrane assemblies in the ceramic membrane filtration unit of the upper section is greater than the number of ceramic membrane assemblies in the ceramic membrane filtration unit of the lower section; The ceramic membrane in the ceramic membrane assembly is tubular, the parallel structure means that the raw liquid side pipelines of the ceramic membrane are connected in parallel, and the series structure means that the raw liquid side pipelines of the ceramic membrane are connected in series; The circulation pump is connected to the liquid inlet of the ceramic membrane filtration unit of the first section.

2. The energy-saving ceramic membrane device according to claim 1, characterized in that: The total number of ceramic membrane components in the energy-saving ceramic membrane equipment is greater than 8.

3. The energy-saving ceramic membrane device according to claim 1, characterized in that: The number of ceramic membrane assemblies in the ceramic membrane filtration unit of the first section is at least 4.

4. The energy-saving ceramic membrane device according to claim 1, characterized in that: Each section of the ceramic membrane filtration unit includes an inlet header and an outlet header, and the inlet and outlet of the ceramic membrane assembly are respectively connected to the inlet header and the outlet header; and along the direction from the feed inlet to the outlet, the outlet header of the ceramic membrane filtration unit of the previous section is connected to the inlet header of the ceramic membrane filtration unit of the next section.

5. The energy-saving ceramic membrane device according to claim 1, characterized in that: The number of the ceramic membrane filtration units is three, and along the direction from the feed liquid inlet to the outlet, the number of ceramic membrane components in the three sections of the ceramic membrane filtration units is 4-8, 3-7, and 2-6 respectively.

6. The energy-saving ceramic membrane device according to claim 1, characterized in that: The ceramic membrane in the ceramic membrane assembly is of single-tube type or multi-channel type.

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