[0023] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.
[0024] The present invention provides a technical solution: according to the instructions attached Figure 1-2 It can be seen that this case is an intercepted composite membrane degreasing and iron removal process, which mainly includes: a housing 1, a water inlet 101 is provided at the bottom end of the housing 1, an oil drain port 102 is provided on the upper side of the side wall of the housing 1, and an outlet is provided at the top of the housing 1. The nozzle 103 is provided with a film-type blocking and oil removal filter element 2 inside the housing 1.
[0025] Among them, the wire-wound filter element is provided with a lignocellulose layer 201, an oil-repellent fiber short filament layer 202, and an activated carbon fine powder layer 203 consisting of an oil and iron removal membrane. The oil and iron removal membrane is composed of a separate oil-repellent fiber short filament , Or the combination of oleophobic fiber short filament and lignocellulose, or the combination of oleophobic fiber short filament and lignocellulose and activated carbon powder, or the combination of oleophobic fiber short filament and activated carbon powder.
[0026] Among them, the process steps for removing oil and iron are as follows:
[0027] Step S1: Fix the condensate water inlet pipe with the water inlet, fix the oil drain pipe with the oil drain outlet, and fix the condensate water outlet pipe with the water outlet;
[0028] Step S2: Introduce the condensed water containing oil and iron into the shell, enter through the outer wall of the film-type blocking and removing oil filter element, and come out from the inner wall, and the oil and iron are blocked by the oleophobic fiber;
[0029] Step S3: The intercepted oil is floated to the upper part of the shell, and is led out to the sewage pipe through the sewage outlet for recovery treatment, the purified condensate is led out through the water outlet to the outlet pipe, and the filtered condensate is collected uniformly.
[0030] The thickness of the lignocellulose layer 201 is 1-5 mm, the thickness of the short oleophobic fiber layer 202 is 1-5 mm, and the thickness of the activated carbon fine powder layer 203 is 1-5 mm.
[0031] Among them, the wire-wound filter element is a cotton-wedge wire filter element, or a stainless steel wedge-shaped wire filter element. The pipe diameter of the stainless steel wedge-shaped wire filter element is 32-50mm, and the wire diameter of the stainless steel wedge-shaped wire filter element is 1-2mm. The wire width of the filter element is 0.05-0.5mm.
[0032] In summary, the condensate containing oil and iron enters the housing 1 through the water inlet 101, and the oil and other contaminants contained in the condensed water are blocked by the filter element mechanism 2, so as to filter the condensed water. After the condensate is recycled through the water outlet 103, the intercepted composite membrane degreasing and iron removal process can take advantage of the simple equipment and small volume of the composite membrane system, and can avoid the composite membrane with low dirt holding capacity and frequent backwashing , The problem of more solid waste is generated. At the same time, the interception composite membrane degreasing and iron removal process solves the problems of large interception technology equipment and high operating costs caused by the high cost of interception filter elements.
[0033] On the outer wall of the wire-wound filter element, at least one layer of oil-repellent short filaments or oil-repellent fiber powder is laid to form a film-type oil-removing filter element. When water containing oil or other particles is removed from the film-type filter element When the outer wall of the oil filter element passes through the oil-repellent fiber staple or fiber powder filter layer, the oil and other impurities are intercepted. After the oil is intercepted, it floats to the water surface and can be discharged regularly. If the film-type interception oil filter element is polluted or has a pressure difference When it is too large, the film can be removed by compressed air and water, and then a new film can be laid to restore the effect.
[0034] The intercepted composite membrane degreasing and iron removal process is an organic combination of the intercepted degreasing technology and the composite membrane degreasing and iron removal technology. There are 4 solutions:
[0035] The first type is to change the lignocellulose laid in the first layer to hydrophilic and oil-repellent fiber short filament materials, and use the blocking film formed by hydrophilic and oil-repellent fiber short filaments to achieve the effect of blocking and removing oil that cannot pass the oil. The activated carbon The powder acts as an anchor for adsorbing oil stains. The composite film formed in this way can anchor and intercept oil stains more effectively, so that the oil can be separated and removed more effectively. The intercepted oil droplets float to the top of the tank and discharge regularly after reaching a certain amount. That's it.
[0036] The second type is to spread a layer of hydrophilic and oil-repellent fiber powder on the basis of the original composite membrane. The original double-layer membrane becomes a three-layer membrane to form a 3-level deoiling and iron removal effect. This will block the technology and The composite membrane technology is organically combined, so that the oil is preferentially blocked by the hydrophilic and oil-repellent fiber powder. The lignocellulose and activated carbon in the bottom layer are used for deep degreasing, which can make the effluent reach higher precision, and the blocked oil droplets float to the tank. The top of the body can be discharged regularly after reaching a certain amount.
[0037] The third type is to directly spread a thick layer of hydrophilic and oil-repellent fiber short filament material, which can be used as a blocking membrane and oil removal filter element alone. Compared with a wound filter element made of hydrophilic and oil-repellent fiber filaments, it can be used at any time. Convenient film bursting and film laying, the operating cost is much lower than the interception and oil removal filter element, the intercepted oil droplets float to the top of the tank, and discharge regularly after reaching a certain amount.
[0038] The fourth type, the first layer is laid with lignocellulose, and the lignocellulose is used to build the membrane skeleton on the winding silk filter element 4, and the second layer is made of hydrophilic and oil-repellent fiber powder to be used as a blocking and de-oiling filter element. The two can also be mixed in a certain ratio and then spread together. This combination can effectively utilize the filter-aid characteristics of lignocellulose and the oil removal performance of the intercepted fiber. The effluent oil content index is lower and more stable.
[0039] In summary, the embodiment of the present invention provides an intercepted composite membrane degreasing and deironing process, which includes: a housing 1, a water inlet 101 is provided at the bottom end of the housing 1, and an oil discharge port is provided on the upper side of the housing 1 102. The top of the housing 1 is provided with a water outlet 103, and the housing 1 is provided with a film-type blocking and de-oiling filter element 2. The blocking-type composite film degreasing and de-ironing process has a reasonable design and absorbs the film-type degreasing and degreasing Iron technology and blocking are the respective advantages of oil and iron removal technology, while avoiding their respective shortcomings, that is, they give play to the advantages of simple equipment and small size of the composite membrane system, and avoid the small dirt holding capacity of the composite membrane and frequent backwashing. The problem of generating more solid waste, the advantage of the long operating cycle of the filter element of the intercepting and de-oiling technology has solved the disadvantages of the large volume of the equipment of the intercepting and de-oiling technology, high cost of the interception filter, and inconvenient replacement.
