CN205095506U - Decarbonization solution strainer filter core, filter and back flush decarbonization solution strainer - Google Patents

Abstract

The utility model discloses a decarburization solution filter element, which is characterized in that it comprises a tube plate (1), a filter cylinder (2), a steel wire mesh (3) and a filter cloth layer (4), the tube plate (1 ) are provided with a number of through holes for the filter cartridges (2) to pass through. The filter cartridges (2) are cylinders with an open upper end and a closed lower end. The upper ends of several filter cartridges (2) are fixed on the tube plate (1) In the through hole of the filter cartridge (2), filter holes (2a) are distributed on the side wall of the filter cartridge (2), and the outer wall of the filter cartridge (2) is wrapped and fixed with a multi-layer steel wire mesh (3), and the outermost steel mesh ( 3) A layer of filter cloth layer (4) is wrapped outside. The utility model also discloses two kinds of filters assembled by the filter core. The filter element of the utility model is easy to manufacture, low in cost, difficult to block and convenient to clean.

Description

Decarburization solution filter element, filter and backwash decarburization solution filter

technical field

The utility model relates to a decarbonization solution filter core, and also relates to a decarbonization solution filter and a backwash decarbonization solution filter including the filter core.

Background technique

The decarbonization system of the nitrogen fertilizer plant adopts the improved hot potash-alkali method to remove CO ₂ , that is, the low-variation gas (CO ₂ content is about 19%) at the outlet of the low-variation furnace passes through the low-variation gas waste boiler, reboiler, and low-variation gas cooling in sequence. Then enter the absorption tower and be absorbed by the K ₂ CO ₃ solution in the absorption tower. The CO ₂ in the purified gas after absorbing CO ₂ is ≤0.1%, and the purified gas enters the methanation after passing through the purified gas separator The system performs a heat exchange reaction. The semi-lean liquid from the middle of the absorption tower (K ₂ CO ₃ content is 16-19%) and the lean liquid from the top (K ₂ CO ₃ content is 23-26%) absorb CO ₂ and become KHCO ₃ solution from the absorption After coming out of the bottom of the tower and decompressing, it enters the regeneration tower, and heats the reboiler through the low temperature change gas, so that the KHCO ₃ solution in the regeneration tower is regenerated into a K ₂ CO ₃ solution, and the regenerated CO ₂ is condensed through the tower top cooler, and then After entering the separator to separate the condensed water, it is directly used for urea production or vented. The K ₂ CO ₃ solution from the bottom of the regeneration tower passes through the lean liquid heat exchanger, the lean liquid water cooler, and then is transported to the top of the absorption tower through the lean liquid pump, and a K ₂ CO ₃ solution is connected in parallel to the main line of the lean liquid pump outlet Filter, part of the solution passes through the filter to remove the dregs in the K ₂ CO ₃ solution, thereby purifying the solution. The semi-lean liquid from the middle of the regeneration tower is flashed with _CO2 through the flash tank and then transported to the middle of the absorption tower through the semi-lean liquid pump, and the semi-lean liquid from the middle of the absorption tower and the lean liquid from the top enter the absorption tower again Absorb the CO ₂ in the low-variation atmosphere, and so on.

The dross in the decarburization solution (ie K ₂ CO ₃ solution) mainly comes from the catalyst powder carried in the low gas change, pipeline corrosion, the dirt that was not cleaned on the packing when the absorption tower and the regeneration tower were filled, and the decarbonization system The sundries left behind are not completely cleaned before driving. During the operation of the system, the decarburization system equipment, pipes and fillers will cause dirt due to corrosion.

The current K ₂ CO ₃ solution filter element is a ceramic filter element, the filter holes are very small and easily blocked. In the process of use, even if a small amount of K ₂ CO ₃ solution is passed into the filter, the filter holes will be blocked immediately, and the filter has to be cleaned immediately, which fails to achieve the purpose of filtering a large amount of solution. When cleaning the filter element, it is necessary to disassemble the large filter cover, hang the filter element out with a gourd, then rinse it with desalinated water, rinse it and then put it back. It takes 2-3 hours for each cleaning time, because the filter is often blocked , It has to be cleaned 3-4 times a day, which is very time-consuming and labor-intensive.

Utility model content

In order to solve the above technical problems, the utility model provides a decarburization solution filter element which is not easy to block and easy to clean. The utility model also provides a decarburization solution filter and a backwash decarbonization solution filter equipped with the filter element.

In order to achieve the above-mentioned first purpose, the technical scheme of the utility model is as follows: a decarburization solution filter element, characterized in that: it includes a tube plate, a filter cartridge, a steel wire mesh and a filter cloth layer, and there are several holes on the tube plate A through hole for the filter cartridge to pass through. The filter cartridge is a cylinder with an open upper end and a closed lower end. The mouths of the upper ends of several filter cartridges are fixed in the through holes on the tube plate. Filter holes are distributed on the side walls of the filter cartridges. The outer wall of the filter cartridge is wrapped and fixed with multiple layers of steel wire mesh, and the outermost layer of steel mesh is wrapped with a layer of filter cloth.

Using the above scheme, the filter element thus produced is a mechanical filter element, and the filter device is made of filter cloth and steel wire mesh, which is not easy to block, easy to wash, light in weight, easy to replace filter cloth and filter screen, and low in cost.

In the above solution: the upper end of the filter cartridge is provided with a flange, and the filter cartridge is fixed on the tube plate through the flange.

In the above scheme: the steel wire mesh has 5-6 layers.

In the above solution: the steel wire mesh is a steel wire mesh with a pore size of 300 mesh, and the filter cloth layer is wrapped by a filter cloth of 100-300 mesh. First use 100-300 mesh filter cloth to intercept larger slag, and then use 300 mesh steel wire mesh to intercept smaller slag to improve filtration efficiency.

Another object of the present invention is achieved in this way: a decarburization solution filter, comprising a tank body, characterized in that: the filter element described in any one of claims 1-4 is buckled upside down in the tank body, and the filter element is fixed through the tube plate On the bottom plate of the tank body, a conical funnel is provided in the middle of the bottom plate of the tank body, a liquid inlet is provided on the upper part of the tank body, and a liquid inlet valve is arranged on the liquid inlet port, and the bottom of the conical funnel There is a drain port at the end, and a drain valve is installed on the drain port.

The third purpose of the present invention is achieved in that a backwashing decarburization solution filter includes a filter tank, characterized in that: the filter core according to any one of claims 1-4 is installed in the filter tank, the filter core The upper part of the filter tank is fixed by the tube plate, the filter tank below the tube plate is provided with a liquid inlet, the liquid inlet is provided with a liquid inlet valve, and the filter tank above the tube plate is provided with a liquid discharge port , a liquid discharge valve is provided on the liquid discharge port, a backwash pipe is provided at the top of the filter tank, a sewage discharge port is provided at the bottom end, and a sewage discharge valve is provided on the sewage discharge port.

In the above scheme: the backwashing pipe is connected with a first valve and a second valve, and the pipeline before the first valve and the second valve is respectively connected with a nitrogen branch pipe and a desalinated water branch pipe, and the nitrogen branch pipe and the desalinated water branch pipe The branch pipes are also provided with valves respectively. Directly use nitrogen and desalinated water for backwashing, which can remove the dross attached to the filter element without dismantling the large cover, improving cleaning efficiency and reducing labor force.

Beneficial effects: the filter element of the utility model is easy to manufacture, low in cost, not easy to be blocked, easy to clean, and reduces the labor force of workers.

Description of drawings

Fig. 1 is a structural schematic diagram of a filter element of the present invention.

FIG. 2 is a partial enlarged view of A in FIG. 1 .

Figure 3 is a side view of the filter cartridge.

Figure 4 is a top view of the tube sheet.

Fig. 5 is a structural schematic diagram of the decarburization solution filter of the present invention.

Fig. 6 is a structural schematic diagram of a backwash decarburization solution filter.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment 1, as shown in Figures 1-4: the decarburization solution filter element of the present utility model is composed of a tube plate 1, a filter cartridge 2, a steel wire mesh 3, a filter cloth layer 4 and other components.

The tube plate 1 is a circular plate, and the tube plate 1 has a number of through holes for the filter cartridge 2 to pass through. The filter cartridge 2 is a cylinder with an open upper end and a closed lower end. The upper ends of several filter cartridges 2 are fixed on the tube plate 1. In the through hole of the filter cartridge 2, a flange 5 is provided on the upper end of the filter cartridge 2, and the filter cartridge 2 is fixed on the tube sheet 1 through the flange 5.

Filtration holes 2a are distributed on the side wall of the filter cartridge 2, and the outer wall of the filter cartridge 2 is wrapped and fixed with multiple layers of steel wire mesh 3, and the outermost layer of steel mesh 3 is wrapped with a filter cloth layer 4. Preferably: the steel wire mesh 3 has 5-6 layers. The steel wire mesh 3 is a steel wire mesh with an aperture of 300 mesh, and the filter cloth layer 4 is wrapped by a filter cloth of 100-300 mesh.

Example 2

As shown in Figure 5, the decarburization solution filter includes a tank body 6, the filter element in embodiment 1 is buckled inside the tank body 6, and the filter element is fixed on the bottom plate of the tank body 6 through the tube sheet 1, and the bottom plate of the tank body 6 The middle part is provided with conical funnel 7, and the center line of conical funnel 7, the center line of tank body 6 and the center line of filter element are on the same straight line, and the upper part of tank body 6 is provided with liquid inlet, is provided with on the liquid inlet Liquid inlet valve, the bottom end of tapered funnel 7 is provided with liquid discharge port, and liquid discharge valve is installed on liquid discharge port. The solution before filtration enters through the filter element from the liquid inlet and is discharged from the liquid discharge port. The filter element is easy to install and disassemble.

Example 3

As shown in Figure 6: backwashing decarburization solution filter, comprises filter tank 8, the filter core of embodiment 1 is installed in filter tank 8, and this filter core is fixed on the top in filter tank 8 by tube plate 1, specifically, tube plate 1 is a circular plate matching the filter tank 8. The tube plate 1 divides the inside of the filter tank 8 into upper and lower chambers. The filter tank 8 below the tube plate 1 is provided with a liquid inlet 81, and on the liquid inlet 81 A liquid inlet valve is provided, a liquid discharge port 82 is provided on the filter tank 8 above the tube sheet 1, a liquid discharge valve is provided on the liquid discharge port 82, a backwash pipe is provided at the top of the filter tank 8, and a sewage discharge port is provided at the bottom end Port 83 is provided with a blowdown valve on the blowdown port 83. The backwash pipe is connected with a first valve 9 and a second valve 10, and the pipes before the first valve 9 and the second valve 10 are respectively connected with a nitrogen branch pipe 11 and a desalination water branch pipe 12, and a nitrogen branch pipe 11 and a desalination water branch pipe 12 There are also valves on them.

The utility model is not limited to the above specific embodiments, and it should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative work. In short, all technical solutions that can be obtained by those skilled in the art based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the protection scope determined by the claims .

Claims (7)

1. a decarburization solution filter element, is characterized in that: comprise tube sheet (1), filter cylinder (2), steel wire mesh (3) and filter cloth layer (4), on described tube sheet (1) open There are a number of through holes for the filter cartridges (2) to pass through. The filter cartridges (2) are cylinders with an open upper end and a closed lower end. The upper ends of the filter cartridges (2) are fixed to the through holes on the tube sheet (1). Inside, filter holes (2a) are distributed on the side wall of the filter cartridge (2), the outer wall of the filter cartridge (2) is wrapped and fixed with multi-layer steel wire mesh (3), and the outermost layer of steel wire mesh (3) is Wrap one layer of filter cloth layer (4). 2. according to the described decarburization solution filter element of claim 1, it is characterized in that: the upper end cylinder mouth of described filter cartridge (2) is provided with flange plate (5), and described filter cartridge (2) passes through flange plate ( 5) Fix it on the tube sheet (1). 3. The decarburization solution filter element according to claim 1, characterized in that: the steel wire mesh (3) has 5-6 layers. 4. according to the described decarburization solution filter element of claim 3, it is characterized in that: described steel wire mesh (3) is that aperture is 300 mesh steel mesh, and described filter cloth layer (4) is wrapped by 100-300 mesh filter cloth become. 5. A decarburization solution filter, comprising a tank body (6), characterized in that: the filter element according to any one of claims 1-4 is buckled upside down in the tank body (6), and the filter element passes through the tube sheet (1) Fixed on the bottom plate of the tank body (6), the middle part of the bottom plate of the tank body (6) is provided with a conical funnel (7), and the upper part of the tank body (6) is provided with a liquid inlet, on the liquid inlet A liquid inlet valve is provided, and the bottom end of the tapered funnel (7) is provided with a liquid discharge port, and a liquid discharge valve is installed on the liquid discharge port. 6. A filter for backwashing decarburization solution, comprising a filter tank (8), characterized in that: the filter core according to any one of claims 1-4 is installed in the filter tank (8), and the filter core passes through the tube sheet (1) fixed on the top in the filter tank (8), the filter tank (8) below the tube sheet (1) is provided with a liquid inlet, and a liquid inlet valve is provided on the liquid inlet, and the tube sheet ( 1) The filter tank (8) above is provided with a liquid discharge port, and a liquid discharge valve is provided on the liquid discharge port. The top of the filter tank (8) is provided with a backwash pipe, and the bottom end is provided with a sewage outlet. A drain valve is provided on the drain port. 7. according to the described backwash decarburization solution filter of claim 6, it is characterized in that: first valve (9) and second valve (10) are connected on the described backwash pipe, between first valve (9) and The pipeline before the second valve (10) is connected with a nitrogen branch pipe (11) and a desalination water branch pipe (12), and the nitrogen gas branch pipe (11) and the desalination water branch pipe (12) are also provided with valves respectively.