JPS61266303A - Stationary oxygen generator - Google Patents

Abstract

PURPOSE:To generate O2 having high purity by the thermal decomposition or catalytic reaction of a H2O2 derivative. CONSTITUTION:A H2O2 deriv. 2 and water 1 are charged to a reaction vessel 3 provided with a heat generating body 4 capable of generating heat with 2-25Cal/cm<2> energy density at the bottom of the vessel. The vessel 3 is inserted into a charging hole 10 of a stationary O2 generator 0 and water, absorbent, adsorbent, or coolant are inserted to between >=2 stages of laminated plates in the vertical direction so as to remain >=2cm<2> sectional area of void to adjust the pressure drop to <=50kPa. Thus, a purifying filter 9 having <=0.1m height per overall transfer unit basing on gas is provided. Thereafter, the heater 4 is electrified through a plug 8, thermistor 7, and a switch 6 to cause thermal decomposition or catalytic reaction generating O2, which is discharged from an outlet 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stationary oxygen generator that generates pure oxygen by thermal decomposition reaction or catalytic reaction of hydrogen peroxide derivatives.

Industrial applications: Improving health, physical strength, beauty, etc. after sports such as tennis, marathons, aerobics, etc., recovering fatigue and vitality from studying, working, hangovers, car sickness, etc., evacuation from mines, hotels, etc. It is widely used and regularly used by people with heart and respiratory diseases.

There are many conventional techniques such as cryogenic method, high-pressure cylinder method, electrolysis method, electroconcentration method, chemical reaction method, etc., but chemical methods using hydrogen peroxide derivatives etc. are attracting attention because they are compact, lightweight, simple, and inexpensive. There is.

Problems that the invention is trying to solve: The decomposition reaction of hydrogen peroxide derivatives is still far from perfect, as it emits harmful substances such as manganese compounds used as catalysts, and oxygen gas is insufficiently purified. .

Means to Solve the Problem If no catalyst is added, setting the temperature to 55±5℃ for the thermal decomposition reaction of sodium percarbonate will not be affected by temperature changes in winter or summer, and oxygen will be generated quickly and Stabilize. When adding a catalyst, mix iron, nickel, and silver sulfates, which are not particularly harmful, and activated carbon in a ratio of 20:5:2:1.
By leaching and drying or simply mixing them at the same pressure to form a catalyst, the problem of exhaust pollution is eliminated. Regarding impurities in gas, by stacking gas purification filters in multiple stages, it is possible to create a small, lightweight, and high-performance purification filter.

Effect There are two methods for decomposing sodium percarbonate: thermal decomposition method and catalytic method. Kinetically, both can be explained by a reaction mechanism similar to a catalytic reaction, but specific reactions occur depending on the conditions of temperature, pressure, and concentration. That is, at a concentration higher than the saturation concentration, the rate-determining process is the pressure-dependent oxygen desorption process, and at lower concentrations, the rate-determining process is the temperature-dependent surface reaction process.

The conditions for obtaining a predetermined flow rate are as follows.

Relationship between predetermined flow rate and temperature: “(reaction rate (1/win))”
= k (reaction rate coefficient)・C (concentration), however, = (frequency factor) x exp (-ΔE (activation energy) /
R (gas constant = 2KCal/mole) ・T (absolute temperature)) If the predetermined flow rate (reaction rate) is kept constant, the reaction rate coefficient for a known concentration can be found from the reaction rate equation, and the temperature can also be calculated from the Arrhenius equation. .

Useless balance: The calorific value of the heating element and reaction heat is the calorific value of the generator,
It is in equilibrium with the dissipated heat (0.4 Cal/5 in) and the amount of steam heat.

Impurities in the gas: Alkaline components and nascent oxygen can be almost completely removed by setting the total height of the column to 0.5 m and filling it with a water-absorbing polymer, and it can be used for a long period of time once filled.

Heat insulation: By stacking multi-stage filters around the reactor, the overall heat transfer coefficient is reduced to 1OKcal/n+”・hr
・The temperature of the side wall is room temperature.

Table 1 shows the frequency factor and activation energy under various conditions determined from experiments and literature.

Table 1 Catalyst Water ΔE kn type amount (g)
Type amount (g) (kcal/M) (win'
) KMno, , 02 Pure water 200 9.6
2.5x t06// , Q4 // //
// 4J //”, 2 〃〃
5.4 g, 3 This Act 1 〃 〃 10
4” // 2// // g 5
//〃 5 〃 〃 7 8 〃--Tap water/l 11 2XlO”NazCO+(sa
t) tt tt 13 5X10'〃
Pure water〃16 2.5xlO”HtOtinN
atCO+(sat) 〃〃tXio” Table 1 shows 1 to 3
This shows that saturated/unsaturated thermal decomposition reactions and the catalytic reaction of this method can be used to generate 17 m1n of oxygen. Note that it is reasonable to use a decomposition reaction in a saturated state from the standpoint of being small, lightweight, and simple.

Table 2 shows sodium percarbonate IQOg and water 1 under pressure.
2 shows the amount of oxygen generated and changes in temperature over time due to a thermal decomposition reaction using 00.200 g.

Table 2 Added water Cg') 100 2
00 Pressure (1 [Pa) 50
0t(sin) T(”C) F(1/5in)
t(win) T(”C) F(1/5in)0160
016G, 33 25. 5. 72 39. 5
．． 5 35. 9 1 55. 8, g
so 1.5 2 sg t
l 652 3 70 1.81.
3 75 2 3.3 71 21.7
78 2.2 3.7 74 2.31
．． 9 81 1.5 4 80 2.5
4.6 lll5 1.5 4.6 84
2.35.3 87 1.3 4.8 8
6 27 88 1 5.9 88
1.39.1 88 1 7 89
19.7 87. 8 8 90.
810 87. 5 8.5 90. 5
Table 2 shows that the reaction yield of the thermal decomposition reaction is around 85% in both saturated and unsaturated states, and that the amount of oxygen generated is stabilized when the pressure is applied.

Table 3 shows 100 g of sodium percarbonate and 10 g of water under pressure.
2 shows the time change in the amount of oxygen generated in a catalytic reaction using 0.200 g and 1.5 g of Honbo catalyst.

Table 3 Water (g) 100 200 Pressure (KPa) 50 0 Main catalyst (g) 1 5 1 5t
F Ft F F (minXl/
m1nXl/5in) (sinX]/5inX1/5
in) o o o o o.

,5. 6. 9. 8. 3. 51
1.3 1.8 2 1.2 1.51.6
1.5 2 3 1.5 1.82 1
．． 8 2 4 1.8 24 1.7
2.2 4.8 2 2.55.3 1.6
2 7 1. :(t7 1.5
10 1. 610. 5. 3 12
．． 4. Table 2 shows that Takigawa is stabilized by the catalytic reaction under pressure and saturation.

Table 4 shows the calorific value balance in a thermal decomposition reaction using 100 g of sodium percarbonate and 100 g of water using a 500 W heater, and in a catalytic reaction using too much sodium percarbonate, 100 g of water, and 5 g of Honbo catalyst.

Precondition reaction heat:, I8x oxygen (1) Kcal = 18Kca
l Heat transfer amount; 500W x 2”/4.2 x 6QX 10 (I
Ilin) = lOKCa1 Reactor heat capacity: (Reactor temperature -
room temperature) x, 2Kcal/'1: dissipated heat; (reaction temperature - room temperature) x6.4x 10-'Kcal/akin steam heat:
Heat transfer + reaction heat - (reactor heat ti1 + radiation heat) Table 4 Honbo catalyst (g) 0 0 5 water C
g) 100 200 100 people out and out fever! 'a (Kcal) 28 38
1g reactor hot battle (Eal) 15 29
9 Dissipated heat (KCat) 2 3
3 Steam heat (Kcal) 11 6
6 What should be noted in Table 4 is that the amount of water added should be reduced (20
0g to 10og), the proportion of steam heat (steam) increases (from 16 to 39%). This is because it is thought that as the amount of steam increases, the amount of impurities contained in it also increases. For this purpose, it is necessary to reduce the amount of steam by pressurizing or to further purify the generated gas.

Possible impurities in the generated gas include water vapor, alkali, atomic oxygen, and hydrogen peroxide droplets. Among the impurities, a particularly disturbing ingredient is hydrogen peroxide droplets that irritate the mucous membranes in the oral cavity. This can be absorbed by crosslinked polymers such as gelled polyacrylates. Furthermore, atomic oxygen has a very short lifetime (~μ5 ec), so there is no problem. Furthermore, the alkali content in the steam is within 1% and can be suppressed to within 1100PP by using room temperature gas.

Generated gas (mass velocity; 3g-0t/min a C1
l! , temperature, 40℃, pressure; 120KPa, humidity;
4g-11! O/g-Ot1.003g-11tOf/
g-Ox) in gelatinous sodium polyacrylate (water 10
When the gas is passed through a packed bed (thickness: 50 cm, packing density: 2 g/cm) of 20 g of sodium polyacrylate added to 0 g of sodium polyacrylate, the processing time for the generated gas is as follows.

Table 5 shows the equilibrium relationship between hydrogen peroxide in the gelled sodium polyacrylate packed layer and the absorption layer.

Table 5 fl' g-11tOt/g-Ot X g-■tO
t/g-Polemer, 0001. 01. 0002. 02. 0004. 03. 00065. 04. 001. 05. 0014. 06. 00167. 07. 00213. 08. 0026. 09. 003. 096 Gas standard summary (H.T, U): (1,42/aXRQ)
'=3C+nHowever, a=10cm''/cm', Re(
Reynolds number) = 60 By processing the numerical values in Table 5, the details of the packed bed (II' (H.02-glot-g)) and absorption layer (X (IbOt-g/polymer-g)) are shown in Figure 1. The numerical values are shown, the equilibrium curve and operating line are shown in Figure 2, and the breakthrough curve is shown in Figure 3.

Calculation: The degree of saturation (f) on the absorption surface is j=7 from the area to the left of the breakthrough curve in FIG.

The height of the absorption surface (Z) is the height of the absorption surface. O, amount (S
dll/(+1-IIo)) and b1. The product of T and U1 is Z=, 03x6=, +8 (,.

The saturation degree (F) of the packed bed (,5...) is F= (,5-,
7x, +8)/.

5=, 75.

The IItOw particles adsorbed on the gel-like polymer were 20×
, 75 X, 096 = 1, 4g1ltOt
/cm'.

ITtO brought in by generated gas, firing 3x, 05x, 0
3-.

00045g-11, Ot/hr-am''.

Therefore, the breakthrough time is 1.8/, 0O045=67hr
Therefore, the absorbent in the purification filter should be replaced every 67 hours (200 times).

Example 1 Stationary oxygen generator using pyrolysis method (0): Reaction vessel (3
) (The electric heating element (4) and its terminal (5) are installed on the bottom of metal such as iron, aluminum, 808, etc. with waterproof/insulated construction), 100-200 g of sodium percarbonate (2) and 100-200 g of water (1).
Add 00g and insert it into the inlet (10) of the wooden lid (0).
The gel-like polymer 120 is inserted into the packing layer of the other purification filter (9) and attached to the terminal (5) at the bottom of the device.
Fill each concentrically partitioned filter with (1
Can be used continuously for 200 times with one filling.) However, energization (6,
7, 8) Generate oxygen gas from the oxygen outlet (11) within 1 minute. After the generation is complete, take out the reaction container (3) and pour the solution (
Discard and wash 1 and 2).

Stationary oxygen generator (O) using catalytic reaction; 200 g of sodium percarbonate (2) and 5 g of powdered catalyst (12) wrapped in advance with dissolving paper or isolation paper (+3) that can be opened to release threads, etc.
The cartridge-type reaction vessel (3) filled with
0) and added 200 g of water, pure oxygen having passed through the same purification filter (9) as in Example 1 is immediately generated from the oxygen outlet (11). After the generation is completed, the cartridge type reaction container (3) is taken out and left for a while to solidify the solution, and then discarded.

Effects of the invention Performance by thermal decomposition method using 200 g of sodium percarbonate and 2 QOg of water and catalytic method (powder catalyst (5 g)): Flow rate;
1°5±, 51/min, generation time: 8 minutes, rise time: 30 seconds, oxygen gas purity, PH9, HtOp number PPm
, water vapor partial pressure 80mmHg, gas temperature: room temperature

[Brief explanation of drawings]

Figures 1 to 3 relate to various characteristics of the absorption surface determined from the equilibrium relationship based on Table 4 in order to calculate the treatment time for hydrogen peroxide when gelatinous sodium polyacrylate is used as the absorbent. However, x: hydrogen peroxide concentration in the absorption layer, Il
, hydrogen peroxide concentration in the packed bed, A: oxygen gas velocity, subscripts <B: breakthrough point, E: breakthrough end point, 0: equilibrium point>. Figures 4.5.6.7 are a cross-sectional view, a plan view, a cross-sectional view of a reaction vessel, and a top view of an electric stationary oxygen generator using a pyrolysis method, respectively.
A-^ arrow view is shown. Figures 8.9.1o and U respectively show a cross-sectional view, a plan view, a cross-sectional view of the reaction vessel, and a view taken along arrow 11-B of the catalytic stationary oxygen generator. Explanation of symbols l: water, 2: sodium percarbonate, 3: reaction vessel, 4: electric heating element, 5: terminal, 6: switch, 7: thermistor, 8: plug, 9: purification filter, lo: raw material inlet , 11: oxygen outlet, 12; final catalyst, 13. Separate Paper No. 69

Claims (4)

[Claims] (1) A stationary oxygen generator using a thermal decomposition reaction or catalytic reaction (iron sulfate, activated carbon, etc.) of a hydrogen peroxide derivative. (2) The reaction vessel of the oxygen generator has an energy density of 2~
A stationary oxygen generator according to claim 1, which is provided with a heating element of 25 Cal/cm^2 and is heat-resistant, rust-proof, and waterproof. (3) The oxygen generator consists of an upper lid and its container, and the upper lid has a raw material inlet, an oxygen outlet, and two or more stages opposite these so that the vertical gap cross-sectional area is 2 cm^2 or more. The stationary oxygen generator according to claim 1, wherein a laminate is provided, and the container is provided with two or more laminates so that the cross-sectional area of the gap is 1 cm^2 or more when installed in the gap of the upper lid. . (4) A patent claim in which water, an absorbent, an adsorbent, or a coolant is inserted into the voids of the laminate to reduce the pressure loss to 50 KPa or less and the gas standard summary (H.T.U.) to 0.1 m or less. A stationary oxygen generator according to scope 1.