CN212215092U - Device for simultaneously removing hydrogen sulfide and ammonia waste gas - Google Patents
Device for simultaneously removing hydrogen sulfide and ammonia waste gas Download PDFInfo
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- CN212215092U CN212215092U CN202020105469.2U CN202020105469U CN212215092U CN 212215092 U CN212215092 U CN 212215092U CN 202020105469 U CN202020105469 U CN 202020105469U CN 212215092 U CN212215092 U CN 212215092U
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Abstract
The utility model discloses a device of desorption hydrogen sulfide and ammonia waste gas simultaneously. The device comprises a reactor, wherein a waste gas outlet is formed in the top of the reactor, a demisting plate is arranged on the upper portion of the reactor, a plurality of atomizing spray heads are arranged on the lower portion of the demisting plate, and a grid is arranged on the lower portion of the atomizing spray heads on the lower portion of the demisting plate; the lower part of the reactor is also provided with a plurality of atomizing nozzles, the bottom of the reactor is provided with a liquid storage tank, the bottom of the reactor is provided with a liquid discharge port, and the lower part of the reactor is provided with a waste gas collecting inlet and a liquid supplementing port; the atomizing spray head is communicated with the liquid storage tank through a pipeline, and a circulating pump is arranged on the pipeline. The utility model discloses a handle hydrogen sulfide, the resultant reacts with the ammonia, forms chemical fertilizer ammonium sulfate, and hydrogen sulfide and ammonia in both the desorption waste gas have eliminated the pollution simultaneously, have produced the by-product again, and the wastes material has obtained the utilization, has improved the value.
Description
Technical Field
The utility model relates to a gas purification technical field, concretely relates to device of desorption hydrogen sulfide and ammonia simultaneously.
Background
Hydrogen sulfide is a very harmful impurity in industrial gases such as biopharmaceuticals, sewage fermentation, petrochemical, natural gas, oil field development, coke oven gas, semi-water gas, and the like. Ammonia gas is colorless and irritant gas, exists in the production process of the industry field in a large amount, and can generate nitrogen oxides after being directly combusted to pollute the environment. Hydrogen sulfide and ammonia are often present in the tail gas simultaneously. Their presence not only causes corrosion of the equipment and pipes, but also presents a considerable environmental hazard, being a pollutant that must be eliminated or controlled.
At present, the purification of hydrogen sulfide and ammonia is mostly two independent processes, so that the whole purification process has long flow, high cost and complicated operation.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned purification process flow that exists in hydrogen sulfide and ammonia that the desorption exists in the tail gas simultaneously, with high costs, the operation scheduling problem that complicates, the utility model aims at providing a device and be equipped with hydrogen sulfide and ammonia in the liquid ability effective desorption system simultaneously that has the absorption oxidation function, the reaction product main component after the desorption is ammonium salt fertilizer, like ammonium sulfate and ammonium nitrate, can regard as fertilizer after crystallization precipitation, but the clear liquor recycles as the solvent.
The utility model provides a device for simultaneously removing hydrogen sulfide and ammonia waste gas, which comprises a reactor, wherein the top of the reactor is provided with a waste gas outlet, the upper part of the reactor is provided with a demisting plate, the upper part of the demisting plate is provided with a plurality of downward atomizing nozzles, and the lower part of the atomizing nozzles at the lower part of the demisting plate is provided with a grid;
the lower part of the reactor is provided with a plurality of upward atomizing nozzles, the bottom of the reactor is provided with a liquid storage tank, the bottom of the reactor is provided with a liquid outlet, and the lower part of the reactor is provided with a waste gas collecting inlet and a liquid supplementing port;
the atomizing spray head is communicated with the liquid storage tank through a pipeline, and a circulating pump is arranged on the pipeline.
In some embodiments of the present invention, an ultraviolet lamp is disposed in the absorption and decomposition liquid of the liquid storage tank.
In some embodiments of the invention, the operating wavelength of the ultraviolet lamp is 185 ± 5 nm.
In some embodiments of the present invention, the mesh comprises upper and lower stainless steel meshes spaced by 1-5 cm, the mesh number of the lower stainless steel mesh is 8-15 meshes, and the mesh number of the upper stainless steel mesh is 20-30 meshes.
In some embodiments of the present invention, the mesh contains a quantity of activated carbon particles.
In some embodiments of the present invention, the activated carbon particle packing volume is 5-20% of the volume between the two layers of stainless steel mesh.
In some embodiments of the present invention, the activated carbon particles are columnar or spherical.
In some embodiments of the invention, the columnar activated carbon particles are not less than 2 x 5 mm.
In some embodiments of the invention, the spherical activated carbon particles have a diameter of not less than 3 mm.
In some embodiments of the present invention, the absorption decomposition liquid is sent to the atomizer 8 on the upper part of the device through the pipe 7 by the circulation pump 6 for atomization spraying, and reversely contacts with the waste gas rising from the lower part, and returns to the liquid storage tank 2 at the bottom of the device through the grid 9, after the storage liquid is recycled for a period of time, the storage liquid is discharged into the crystallization sedimentation tank, and ammonium salt crystallization sedimentation and clarification liquid are naturally formed; the ammonium salt can be used as fertilizer or other purposes, and the clear liquid can be recycled.
Specifically, the prepared absorption and decomposition liquid is pumped into the lower part and the upper part of the device simultaneously through a pump, and the absorption and decomposition liquid on the upper part of the device is in reverse contact with waste gas through a grid and activated carbon particles arranged in the grid in an atomization spraying mode; the grid distributes the waste gas and the spraying liquid uniformly to promote the absorption decomposition liquid to fully contact with the waste gas, and the grid is internally provided withA certain amount of activated carbon particles randomly jump in the grid under the drive of the waste gas flow to form turbulent flow so as to increase the contact area and probability of the waste gas and the absorption decomposition liquid; absorb the decomposition liquid through atomizing in the lower part of device, form an atomizer chamber at waste gas air inlet horizontal position to the graticule mesh interval on upper portion, this atomizer chamber can increase waste gas and the contact time of atomizing absorption decomposition liquid, compare with the absorption decomposition liquid water droplet that falls back from device upper portion, the absorption decomposition of atomizing tiny droplet to waste gas is faster, can reach the purification effect that the absorption decomposition liquid water droplet obtained with longer contact time with shorter contact time, on the basis that reaches the same purification effect the shortening of contact time mean can reduce the inner space height of device, thereby make the device is more dexterous, to being less than 10000 cubic per hour waste gas flow, the device can design the worker movable even. And the absorption decomposition liquid after absorbing the hydrogen sulfide and the ammonia gas in the waste gas falls and flows back to a storage pool at the bottom of the device by means of the gravity of the absorption decomposition liquid. Absorbing the hydrogen sulfide and ammonia in the waste gas by the decomposition liquid, and oxidizing the hydrogen sulfide into SO with valence 4 by the decomposition liquid3 2-Or 6 valent SO4 2-Acid components in the absorption liquid and acid substances generated after hydrogen sulfide is oxidized react with ammonia gas to generate corresponding ammonium salt, and a small part of hydrogen sulfide and ammonia gas which do not react are further oxidized by oxidant in the decomposition liquid and ozone generated by a 185nm ultraviolet lamp in the storage liquid at the bottom of the device: i.e. hydrogen sulphide or SO3 2Is finally oxidized into-SO4 2-The ammonia gas being oxidized to NO3 -After formation of NH4NO3. Thereby achieving the purpose of simultaneously removing hydrogen sulfide and ammonia gas at one time.
For many enterprises, such as garbage dumps, biological fermentation, sewage fermentation and other waste gas discharge, typical concentration values of ammonia gas and hydrogen sulfide at tail end of tail gas are respectively 2mg/m3And 0.1mg/m3The smell threshold values of ammonia gas and hydrogen sulfide are low and are respectively 0.1mg/m3And 0.005mg/m3Therefore, even if the exhaust gas concentration is low as recited in the present patent, the exhaust gas concentration can be maintainedWhich brings about a serious odor, and, on the other hand, in a certain concentration range, the lower the concentration, the slower the kinetic reaction. Therefore, it is more practical to treat the exhaust gas concentration exemplified in this patent.
It is further noted that the oxidant ClO2 used in the present invention has been widely used worldwide due to its environmental protection properties, particularly in water treatment; similarly, ozone has also obtained a large amount of applications in the water treatment field, the utility model discloses an oxidant not only has the efficient oxidability, and is right the utility model provides a get rid of high efficiency of target thing, there is not water pollution to the waste liquid of production simultaneously.
The utility model discloses in, the defogging board is the defogging board product that market has sold, does not have other special construction requirements except that oxidation resistance and acid and alkali-resistance. Those skilled in the art can freely select them as needed.
The beneficial effects of the utility model reside in that:
the utility model discloses a handle hydrogen sulfide, the resultant reacts with the ammonia, forms chemical fertilizer ammonium sulfate, and hydrogen sulfide and ammonia in both the desorption waste gas have eliminated the pollution simultaneously, have produced the by-product again, and the wastes material has obtained the utilization, has improved the value. In some embodiments, a portion of the ammonia gas may be further processed into chemical fertilizer ammonium nitrate. The utility model integrates the desulfurization and deamination process, shortens the prior process flow, and reduces the equipment expense and the operation cost; atomizing spray system makes H2S and NH3The absorption and decomposition are faster, and the removal rate is higher; the use of a 185nm ultraviolet lamp can facilitate H2S and NH3Oxidation reaction of (3). The utility model is suitable for a system that hydrogen sulfide and ammonia exist simultaneously such as bio-pharmaceuticals, sewage treatment, coal coking, coal gasification, marsh gas, synthetic ammonia tail gas, claus tail gas realize low-cost joint desulfurization deamination.
Drawings
Fig. 1 is a schematic structural diagram of a device for simultaneously removing hydrogen sulfide and ammonia gas according to an embodiment of the present invention.
In the figure: 1. the device comprises a collecting waste gas inlet, a liquid storage tank 2, an ultraviolet lamp 3, a liquid discharge port 4, a demisting plate 5, a circulating pump 6, a pipeline 7, an atomizing nozzle 8, a grid 9, a waste gas outlet 10 and a liquid supplementing port 11.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
Before the present embodiments are further described, it is to be understood that the scope of the invention is not limited to the particular embodiments described below; it is also to be understood that the terminology used in the examples of the present invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention.
In order to make the present invention better understood by those skilled in the art, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The expressions "first," "second," "again," "then," "next," and the like as used in the specific embodiments herein are not intended to limit the order of precedence.
Example 1
An absorption decomposition liquid for removing hydrogen sulfide and ammonia waste gas comprises an absorption liquid and a decomposition liquid;
the absorption liquid is selected from 5% sulfamic acid aqueous solution, 8% oxalic acid aqueous solution, 8%, 10% and 20% citric acid aqueous solution, the decomposition liquid is selected from 10%, 12%, 18%, 20% and 30% sodium chlorite aqueous solution, and the absorption liquid and the decomposition liquid are mixed according to the ratio of 10: 1, and the concentration is weight volume percentage.
TABLE 1 formulation of absorption decomposition liquid
| Absorption liquid | Decomposing liquid | Volume ratio of absorption liquid to decomposition liquid | |
| Absorption decomposition liquid 1 | 5% strength aqueous sulfamic acid solution | 12% aqueous sodium chlorite solution | 10:1 |
| Absorption decomposition liquid 2 | 8% oxalic acid aqueous solution | 18% aqueous sodium chlorite solution | 10:1 |
| |
8% citric acid aqueous solution | 20% aqueous sodium chlorite solution | 10:1 |
| Absorption decomposition liquid 4 | 10% citric acid aqueous solution | 10% aqueous sodium chlorite solution | 10:1 |
| Absorbing decomposition liquid 5 | 20% citric acid aqueous solution | Chlorous acid 30%Aqueous sodium solutions | 10:1 |
| Absorption decomposition liquid 6 | 10% strength aqueous sulfamic acid solution | 30% aqueous sodium chlorite solution | 10:1 |
| Absorbing decomposition liquid 7 | 5% strength aqueous sulfamic acid solution | 10% aqueous sodium chlorite solution | 30:1 |
Example 2
As shown in fig. 1, a device for simultaneously removing hydrogen sulfide and ammonia waste gas; the device comprises a reactor, wherein a waste gas outlet 10 is formed in the top of the reactor, a demisting plate 5 is arranged on the upper portion of the reactor, a plurality of atomizing nozzles 8 are arranged on the lower portion of the demisting plate 5, and grids 9 are arranged on the lower portions of the atomizing nozzles 8 on the lower portion of the demisting plate 5;
the lower part of the reactor is also provided with a plurality of atomizing nozzles 8, the bottom of the reactor is provided with a liquid storage tank 2, an ultraviolet lamp 3 is arranged in absorption and decomposition liquid of the liquid storage tank 2, the bottom of the reactor is provided with a liquid discharge port 4, and the lower part of the reactor is provided with a waste gas collecting inlet 1 and a liquid supplementing port 11;
the atomizing spray head 8 is communicated with the liquid storage tank 2 through a pipeline 7, and a circulating pump 6 is arranged on the pipeline 7.
The working wavelength of the ultraviolet lamp 3 is 185nm, and the ultraviolet lamp is fixed in the absorption decomposition liquid in the liquid storage tank 2 positioned at the bottom of the device, and the generated ozone can enhance the oxidation of residual hydrogen sulfide and ammonia gas in the absorption decomposition liquid. The grid 9 comprises an upper layer of stainless steel mesh and a lower layer of stainless steel mesh with the distance of 1-5 cm, the mesh number of the stainless steel mesh on the lower layer is 8-15 meshes, and the mesh number of the stainless steel mesh on the upper layer is 20-30 meshes. The grid 9 is internally provided with activated carbon particles. The filling volume of the activated carbon particles is 10% of the volume between the two layers of the stainless steel nets. The active carbon particles are columnar, and the columnar active carbon particles are 2 x 5 mm. Wherein the height of the column is 2mm, and the diameters of the top surface of the column and the ground are 5 mm.
When the device is operated, waste gas containing hydrogen sulfide and ammonia gas is fed from the bottom of the device through a fan; pumping the prepared absorption decomposition liquid into the upper part of the device through a pump, reversely contacting the prepared absorption decomposition liquid with waste gas in an atomization spraying mode on the upper part of the device, and making the absorption decomposition liquid flow back to a liquid storage tank at the bottom of the device after being fully absorbed and contacted; the prepared absorption and decomposition liquid is simultaneously injected into an atomizing nozzle 8 at the lower part of the device for atomizing and spraying, an atomizing chamber is formed at the lower part of the device, and the atomization chamber and the waste gas are efficiently absorbed and decomposed and fall back into the liquid storage tank 2 at the bottom of the device by the gravity of the atomization chamber;
in the process of treating the waste gas containing hydrogen sulfide and ammonia gas, supplementing and absorbing a decomposition liquid medicament into the liquid storage tank when the pH value of the liquid storage tank is increased to 5-5.5; after a period of time of spraying, absorbing and decomposing, when the content of ammonium salt in the absorption and decomposition liquid in the liquid storage tank is close to saturation, the ammonium salt is discharged to a crystallization and precipitation tank through a liquid outlet at the bottom of the device, the crystallized and precipitated ammonium salt can be used as a fertilizer, and the clarified liquid can be used as an aqueous solution for preparing the absorption and decomposition liquid for recycling.
Device 2
The device for simultaneously removing the hydrogen sulfide and the ammonia waste gas is different from the device 1 in that the active carbon particles are spherical, and the diameter of the spherical active carbon particles is 3 mm.
An apparatus for simultaneously removing hydrogen sulfide and ammonia waste gas is different from the apparatus 1 in that an ultraviolet lamp is not provided.
Device 4
A device for simultaneously removing hydrogen sulfide and ammonia waste gas is different from the device 1 in that the columnar activated carbon particles are 1.5 multiplied by 2mm, wherein the height of the column is 1.5mm, and the diameters of the top surface and the ground of the column are 2 mm.
Device 5
A device for simultaneously removing hydrogen sulfide and ammonia waste gas is different from the device 1 in that the columnar activated carbon particles are 5 x 8mm, wherein the height of the column is 5mm, and the diameters of the top surface and the ground of the column are 8 mm.
An apparatus for simultaneously removing hydrogen sulfide and ammonia waste gas is different from the apparatus 1 in that the filling volume of activated carbon particles is 80% of the volume between two layers of stainless steel nets.
Experimental example 1
The experiments for simultaneously removing hydrogen sulfide and ammonia waste gas are carried out by adopting the absorption decomposition liquid 1-3 and 5-7 and the device 1.
Wherein the specification of the reaction kettle is phi 0.6 x 2.2m, and air, ammonia gas and H are used2S mixed gas is experimental sample gas, and the concentration of ammonia in the inlet mixed gas is 2mg/m3，H2The concentration of S is 0.1mg/m3The flow rate of inlet gas is 5 m/s; the absorption decomposition liquid is used as working liquid, the supplement speed of the working liquid is 20L/h, and the experimental temperature is room temperature; h in the mixed gas2The determination of S adopts methylene blue spectrophotometry, and the determination of ammonia adopts indophenol blue spectrophotometry. The concentration of ammonia gas in the mixed gas outlet gas after passing through the device is 0.05mg/m3，H2The concentration of S is 0.0001mg/m3The removal rates were 98% and 99.9%, respectively.
The results are shown in Table 2.
TABLE 2 results of the experiment
Experimental example 2
And (3) carrying out an experiment for simultaneously removing hydrogen sulfide and ammonia waste gas by adopting the absorption decomposition liquid 4 and the devices 1 and 3-6. The procedure was as in example 1.
The results are shown in Table 3.
TABLE 3 results of the experiment
Research shows that the use of the ultraviolet lamp can not only promote the application of H2S and NH3The oxidation reaction of (2) is also beneficial to reducing the proportion of the oxidant in the absorption decomposition liquid. Meanwhile, the particle size and the filling degree of the columnar activated carbon particles are found to remarkably influence the absorption decomposition liquid on H in the waste gas2S and NH3The effect of the treatment of (1).
The utility model discloses an absorption decomposition liquid is to containing hydrogen sulfide and ammonia exhaust-gas treatment high efficiency, economy, and this absorption decomposition liquid work's spray set simple structure is cooperated, convenient operation, and area is little, no matter is equipment investment, still the maintenance cost accords with the production demand of reality.
While the preferred embodiments and examples of the present invention have been described in detail, the present invention is not limited to the embodiments and examples, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (9)
1. A device for simultaneously removing hydrogen sulfide and ammonia waste gas comprises a reactor, wherein a waste gas outlet (10) is formed in the top of the reactor, a demisting plate (5) is arranged on the upper portion of the reactor, a plurality of downward atomizing nozzles (8) are arranged on the upper portion of the demisting plate (5), and a grid (9) is arranged on the lower portion of each atomizing nozzle (8) on the lower portion of the demisting plate (5);
a plurality of upward atomizing nozzles (8) are arranged at the lower part of the reactor, a liquid storage tank (2) is arranged at the bottom of the reactor, a liquid discharge port (4) is arranged at the bottom of the reactor, and a waste gas collecting inlet (1) and a liquid supplementing port (11) are arranged at the lower part of the reactor;
the atomizing spray head (8) is communicated with the liquid storage tank (2) through a pipeline (7), and a circulating pump (6) is arranged on the pipeline (7).
2. The device according to claim 1, characterized in that an ultraviolet lamp (3) is arranged in the absorption and decomposition liquid of the liquid storage tank (2).
3. The device according to claim 2, characterized in that the operating wavelength of the ultraviolet lamp (3) is 185 ± 5 nm.
4. The device according to claim 1, wherein the grid (9) comprises an upper stainless steel mesh and a lower stainless steel mesh which are spaced from each other by 1-5 cm, the mesh number of the lower stainless steel mesh is 8-15 meshes, and the mesh number of the upper stainless steel mesh is 20-30 meshes.
5. The device according to claim 4, characterized in that the grid (9) is internally provided with activated carbon granules.
6. The apparatus of claim 5, wherein the activated carbon particle packing volume is 5-20% of the volume between the two layers of stainless steel mesh.
7. The device of claim 5, wherein the activated carbon particles are columnar or spherical.
8. The apparatus as in claim 7, wherein the columnar activated carbon particles are not less than 2 x 5 mm.
9. The apparatus as in claim 7, wherein the spherical activated carbon particles are not less than 3mm in diameter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020105469.2U CN212215092U (en) | 2020-01-17 | 2020-01-17 | Device for simultaneously removing hydrogen sulfide and ammonia waste gas |
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| CN202020105469.2U CN212215092U (en) | 2020-01-17 | 2020-01-17 | Device for simultaneously removing hydrogen sulfide and ammonia waste gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068501A (en) * | 2020-01-17 | 2020-04-28 | 珠海益佳生物科技有限公司 | Absorption decomposition liquid, method and device for simultaneously removing hydrogen sulfide and ammonia waste gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068501A (en) * | 2020-01-17 | 2020-04-28 | 珠海益佳生物科技有限公司 | Absorption decomposition liquid, method and device for simultaneously removing hydrogen sulfide and ammonia waste gas |
| CN111068501B (en) * | 2020-01-17 | 2023-10-20 | 珠海益佳生物科技有限公司 | Absorption decomposition liquid, method and device for simultaneously removing hydrogen sulfide and ammonia waste gas |
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Granted publication date: 20201225 Termination date: 20220117 |