JPS586233A - Removing filter for gaseous sulfide - Google Patents

Abstract

PURPOSE:To obtain a filter for sulfides which permits an increase in the volume of the gases to be treated in one hour per apparent volume of adsorbents, is easy to regenerated and can be molded into a cartridge type by depositing active ferrite powder directly on fibers. CONSTITUTION:A ferrous sulfate soln. and a ferric chloride soln. are mixed at a 1:2 ratio, and this soln. is neutralized with an NaOH soln., whereby active ferrite of fine powder having no water of crystallization is obtd. The fine powder 2 of active ferrite is deposited by arbitrary methods on fibers 1 such as paper, synthetic fibers, glass, asbestos, or the like, whereby a filter element is produced. In use, the element is worked to a wave- or star-shaped filter and this filter is incorporated into a desulfurizer. The surfaces of the fine powder of the active ferrite which is an adsorbent is utilized entirely and the increase in an SV value are made possible. This filter is easy to regenerate by repetition of washing and drying followed by air oxidation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter for removing sulfide gases, mainly hydrogen sulfide and Mel*GtanO malodor gases. In more detail, the present invention company uses an active 7 element (0) microscopic powder instead of the conventionally used C-crystalline iron oxide beret (K), and supports this on organic or acupuncture fibers. Sulfide gas removal filter Emm.

Sulfide gas generation companies, various chemical factories, especially paper mills (T57 pulp method), rubber and plastic ivy related plants, oil refineries, etc., as well as urban human waste disposal facilities (digestion #&). And sewage treatment facility Maroba *K + 4 was given, foul-smelling gas. It is the main ingredient. Conventionally, as means for removing these sulfide gases, the Al iI washing method (according to the following O reaction formula 1) and the iron oxide adsorption method (according to the following reaction formula 2) have been used.

)IaOH+ Ha I -4Wall 10Ha O
“Fist” D)? eOz + 1IaH−h F@1!
+ 1ilO@11@...(2) The above O conventional method &! The former's alkaline cleaning method (1)
1 equation method) Hiro, the sulfide gas O1k yield rate is better than Natsume, but l
In the latter iron oxide adsorption method (dry method), regeneration of iron oxide O is easy, but there are problems such as poor adhesion efficiency of sulfide gas.

This article relates to the improvement of the WJ4 ore developed in the present invention and the firewood O iron oxide intercalation method (11, Nishibu). That is, the adsorption agent conventionally used in the O dry method is to form a powder of iron oxide in the crystal layer into a tablet (tablet) using a binder (p*xxe).
t) K 11. I! However, when the processing gas containing the sulfide gas passes through the container filled with the ζ011 adhesive, the surface area where the adsorbent and the sulfide gas come into substantial contact is small. Therefore, In order to obtain a specified adsorption performance, the ay value (intermediate speed IF) must be small and a large amount of O adsorbent is required.

In addition, the Bma value is the spatial velocity (8 paa @ Veloait
y) and 1, as in the following O type O, 1 hour roar)
The amount of oxygen (converted to 0°C) divided by the apparent volume of the adsorbent (including catalyst, etc.) is expressed in units of H-1.

Conventional adsorbents commonly used have a glossy value of less than 1.O, while adsorbents for desulfurization in which the amount of tin layer gas is 1.0-0 per hour require a value of 8 or more.

The present invention overcomes the above-mentioned drawbacks and has the following two improvements.

) The adsorbent can be changed from conventional Og crystalline iron oxide to activated ferrite.

(2) The active ferrite powder is directly supported on the organic material or transverse fibers without using a binder from the conventional O pellet source in combination with a binder as the molding means.

That is, the present invention uses activated ferrite powder obtained by neutralizing a mixed solution of iron salt, ferric salt, and O warm with an alkali to produce organic or inorganic fiber! This is a sulfide gas removal filter that is characterized by having a
%O has the effect of improving the conventional one-ma value by about 10 times.

To explain the present invention in more detail by comparing it with a conventional method, the desulfurization adsorbent 01 [family iron oxide] is produced by neutralizing an acidic iron ion solution in an alkali tube and producing iron hydroxide. Precipitate), or produce recrystalline iron oxide), and O
Iron oxide has a large shaft diameter of 40. On the other hand, with the adsorbent Fi activated It is prepared by heating an ionic solution and a ferric ion solution at a ratio of 1 to 1, and then neutralizing the mixture. According to this O method, activated ferrite with a fine powder (particle size (Ll-4) or less) can be obtained by burning crystal water. [by a well-known method], and their reactions are as follows.

For a-crystalline iron oxide, 21aO1g 1411aO)! −+ 2νe(OH
%+ 611aojν・(OH)s-47N Ol・
n%.

In the case of active ferrite, sheil Q4-4-2 sheil e04 + 8MaOH-41
1J@O-Fil QI+ lfa@go@+! 1i
aoj + 4 islands 0 In the present invention, as mentioned above, fine powdered active ferrite (magnetic iron oxide) without crystal water is used.
Since the particle size of TBL is extremely small, the specific surface area (surface area per unit weight) is extremely large], which is a fundamental factor that helps improve the performance as an adsorbent. It's a turtle.

Next is the molding means. Conventionally, for example, Id4/4 (diameter 4
■, Length - s4 m) As a result, the contact area between the iron oxide and the treatment layer is small.In contrast, in the present invention, The fibers used in the present invention are large enough to allow the powdered ferrite to self-destruct one by one when it comes in contact with a contemplative gas, and a molding method is adopted that allows the fibers to endure. , natural fibers such as paper, cotton, wool, silk, etc.
0-component fibers such as vinylon, TE), and inorganic fibers such as glass, asbestos, and mitsutus are used. It is a choice. First, the present invention KTh-te,
The means for supporting the fiber KJI is arbitrary, but for example, when supporting it on paper, it can be used in the papermaking process using the papermaking method. Suspend the powder (8usp@n5i
In accordance with the present invention, a method of mixing and molding in a zero state can be used.
The carrying amount is arbitrary, or the total weight is 1 l to 40 wt.
t'in, good tL (is 11-40 weight-temel, bottle size,
In this development @, the carpet carrying activated ferrite powder can be used as a filter as it is! However, it is preferable to use filter elements such as mineral, PIl, filtrate, woven fabric, non-woven fabric, etc., and further process it into a corrugated or star-shaped filter.

Attachment v: J#i To explain the present invention to Yokoo S, Fig. 1 is a partially enlarged view of the filter of the present invention, in which activated ferrite powder 2 is placed between fibers 10, one powder each 7
Indicates the state of existence in Lee. In the present invention, as shown in Fig. 1, each powder exists freely between the fibers, so the surface of each powder comes into sufficient contact with the processing gas), and the adsorption performance is maximized. The effect is also θ.

Figure 1 shows examples of the shapes of the filters of the present invention; (mu) is a five-layer filter (f) is a thin black black one; (l is one filter (f)). It is also O after *IIK processing.

If the intention is to reduce the resistance value of the processing gas passing through the filter, it is preferable to use a filter type 11 of (%CB) rather than (MU). Mashii. This is (1) 011111 is (A)
(Compared to I and LK, the aim product of the filter is large 11
%A is larger, I think about it. Even if the convection velocity is the same for both,
Finally, the absolute flow velocity of (1) is extremely small.
This is because, as a result, the resistance to passing through the filter becomes small.

Figure 3 Hiro, desulfurization equipment 01 with the present invention 0 filter installed
For example, the present invention O filter in the longitudinal direction KfIIL
Form KN) - a star-shaped fi hp- (m), set it in two cylindrical volumes all (mu), (mu I), and outer cylinder (
1) and 40 disposed in the plexus (0). The arrow in the figure shows the flow of the gas.

Original Ij! h, As mentioned above, instead of the conventional 0# crystal ■ iron oxide, use fine powder active ferrite lol! Since this is a filter consisting of a structure in which the fibers Km are directly retained, I! Compared to 0% OK, since all of the active filter mold powder can be utilized with the adsorbent, the -ma value can be increased (e and the value are increased by #11 times),
* Circle 4 shows that using a small amount of adsorbent O has a significant effect. Furthermore, the O filter of the present invention can be easily regenerated by air oxidation after washing with water and drying.
By incorporating this, the desulfurization equipment can be made more compact, and the filter can also be molded into the cartridge, which makes it easier to handle and maintain the cartridge. %O.

Example sulfate-iron (y/#false 40)! 111 liquid and ferric chloride (ν・04・aha)zswi liquid,
The solution was neutralized with M*OH$111 to produce active 7E2ite. The obtained 7-elite powder 14 and noodles were combined with a pulp papermaking liquid to maintain a fiber inversion weight of 221α, and a film element having a width of 1, a length of tz, and a thickness of 104 m was produced.

This element, ll5l! ! ! As shown, fold the meat into a liquid shape on one length, layer it with a star-shaped filter (ml), and make a length of sea bream with punched metal. 2 O Ensoyo-(mu),
(7) Set to 04', outer cylinder (1) and lid (0) 0't
” to manufacture a desulfurization filter device* e e
o The equipment is supplied with 1 hydrogen sulfide 1 @ 5 @ 'Iipms methylmethane #★butane 221S) ν 4 hours per hour.
〇- Let it pass and ζro, hydrogen sulfide, meterume envy captan! ! Obtain an O removal rate of - or more.

[Brief explanation of drawings]

11th! i it, O filter of the present invention; Toshi and Kz diagrams are partially enlarged views illustrating the form of the O filter of the present invention; shows. Sub-agents 1) Akihiro Yabuhara Ryo -

Claims (1)

[Claims] A sulfide gas removal filter characterized in that an active 7-elite powder obtained by neutralizing a mixed solution of iron salts and ferrous salts with an alkali is supported on an organic or inorganic fiber.