JPS5817819A - Method for gas-liquid contact - Google Patents

Abstract

PURPOSE:To improve a gas-liq. contacting efficiency with a simple and inexpensive installation, by providing an electric field to a gas to be treated and then making the gas react with a liq. to be treated. CONSTITUTION:A gas which contains SO2, for instance, is fed from a feeding pipe 2 of a desulfurizing device 1 and is discharged from a discharging pipe 3. Water from a feeding pipe 4 is flowed down to several leaves of metalic layer 5 to react with gaseous SO2 which passes through the layer 5. At that time, a 2ndary coil of a transformer is connected by an electric wire 6 to an assembling body of electrodes 7 provided to the front of the layer 5 throughout the whole area of the gas passage to apply an AC high voltage on the electrodes 7. Hereby, the desulfurizing rate is significantly improved in comparing with that of a case treating without an electric field. Further, when 2 stages of the layers 5 are provided, the desulfurizing rate is improved moreover.

Description

[Detailed Description of the Invention] Methods of bringing gas and liquid into contact, for example, methods in which active ingredients in the gas are absorbed into the liquid, or harmful gases in the gas are removed by reacting with the liquid, are widely adopted. ing.

The present invention relates to a method for improving gas-liquid contact efficiency by treating gas with an electric field.

The research results of the present invention will be explained using figures.

SO2 from one end of the desulfurization equipment H with a diameter of 300 to 1200
100% of the raw gas containing ppm from the inlet pipe (2) of 100% diameter.
It is fed at a speed of m/sec and discharged from the discharge pipe (3).

Water flows down three wire mesh layers (5) from the water pipe (4),
React with SO□ passing through the wire mesh group.

The conductor (6) from the secondary wire ring to the transformer is wired to the wire mesh layer (5).
50% in front of the gas passageway over the entire area of the gas passage. +8) +9) indicates grounding. When a desulfurization test was conducted by applying a voltage of 15 Kv to the electrode (7) for 60 cycles, the following desulfurization results were obtained.

15KV electric field No electric field 1st stage 73% 28% 2nd stage 88% 43% Conventionally, widely industrialized boiler exhaust gas desulfurization equipment pumps NaOH liquid such as pH 9 from above a thick Raschig ring layer with a layer height of 1 to 2 m. This is a method in which the raw gas containing SO2 gas is sprayed from below at a speed of, for example, 2 m/see and brought into gas-liquid contact, and the desulfurization rate is 95% on average.

Compared to this, N
The fact that a desulfurization rate of 88% was obtained by contacting with water, which has a weaker desulfurization power than the aOH liquid, is due to the influence of the 15 KV electric field.

In the "Electromagnetism and Electrochemistry" section of the Chemistry Handbook, there is a ``electromagnetism and electrochemistry'' section that states, ``A voltage is applied to an electron to accelerate it, and it is then transformed into a gas molecule, an atom, a free radical,
Or, when collided with ions (positive), molecules that are bombarded by the kinetic energy of these electrons,
Atoms, free radicals, ions, etc. can release one of their own electrons and become cations.

The reason why the desulfurization efficiency of 88% was obtained using a thin wire mesh layer and water having a slow desulfurization rate in the test described in Section 1 is due to the effect of the electric field.

When the same method was used to replace water with a NaOH solution with a pH of 9, results of 8396 in the first stage and 9806 in the second stage were obtained.

The method of the present invention is not limited to SO□ removal, but also NOx removal, 14
It can be widely applied not only to the removal of bad odors such as H3, H2S, and mercaptan, but also to the absorption of gaseous components in production plants.

Further, the gas-liquid contact device is not limited to the illustrated device whose performance was tested, but can be widely applied to other models.

As described above, the present invention has the advantage of achieving efficient gas-liquid contact effects with simple and inexpensive equipment.

[Brief explanation of the drawing]

Figure 1 shows the test desulfurization equipment in which the method of the present invention was tested;
The figure shows a side view of the electrode group. (tl--------One theory sulfur equipment (61----
−−−1 conductor wire 12+−−−−−−−Feed pipe +
7) -Electrode +31--Discharge pipe +8+-Ground +41--Water pipe +9+-Connection
Earth (51------1--Akihito from the wire mesh layer Mitsugu Miura, President and Director of Miura Engaging International Co., Ltd.)

Claims (1)

[Claims] A gas-liquid contact method characterized by applying an electric field to the gas to be treated and then causing it to react with the treatment liquid.