CN108659904B - Methane dry-method desulphurization device - Google Patents
Methane dry-method desulphurization device Download PDFInfo
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- CN108659904B CN108659904B CN201810566384.1A CN201810566384A CN108659904B CN 108659904 B CN108659904 B CN 108659904B CN 201810566384 A CN201810566384 A CN 201810566384A CN 108659904 B CN108659904 B CN 108659904B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
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Abstract
The invention discloses a methane dry-method desulfurization device which comprises five gas inlet and outlet ports, five needle valves, four three-way ball valves, three desulfurization tanks, a rotor flow meter, a fixing device and a moving device. Through the combination switching of five needle valves and four three-way ball valves, two functions of secondary circulating desulfurization and desulfurizer regeneration can be respectively realized. The device has the advantages of safe operation, high utilization rate of the chemical desulfurizer, high removal rate of hydrogen sulfide, high operation efficiency and convenient field movement.
Description
Technical Field
The invention relates to the field of gas desulfurization devices.
Background
The existing desulfurizing device needs to periodically detect the desulfurized H2S gas content, the operation is complicated; the desulfurizer in the desulfurizing tower or the desulfurizing tank is unevenly utilized from top to bottom, if methane is introduced into the desulfurizing tower or the desulfurizing tank from bottom to top, the desulfurizer at the bottom layer is easy to lose efficacy, so that the desulfurizing efficiency is greatly reduced, and if only the desulfurizer at the bottom layer is replaced, the replacement is troublesome; the flow rate control of the biogas is difficult to avoid and unstable in the operation process, and due to single-tank or single-tower desulfurization, the flow rate of the biogas is too high for a while, so that a desulfurizing agent can be penetrated instantly, the removal rate of hydrogen sulfide is reduced, and the operation condition requirements are strict.
In summary, the existing biogas desulfurization device has low utilization rate of desulfurizer and H2The removal rate of S is low, the desulfurization efficiency is low, and the like, so that the use effect of the device is not ideal.
The methane dry-method desulfurization device is based on H2The purposes of high S removal rate, high desulfurizer utilization rate, high desulfurization efficiency and simple and efficient operation are innovated, and the two-stage circular desulfurization and desulfurizer regeneration are kept to be carried out simultaneously through the combined switching of five needle valves and four three-way ball valves.
Disclosure of Invention
A biogas dry desulphurization device structurally comprises a rotor flow meter, a first desulphurization tank, a second desulphurization tank, a third desulphurization tank, a gas inlet, a sampling port, a first gas outlet, a second gas outlet, a third gas outlet, a first needle valve, a second needle valve, a third needle valve, a fourth needle valve, a fifth needle valve, a first three-way ball valve, a second three-way ball valve, a third three-way ball valve, a fourth three-way ball valve, a fixing device and a moving device, wherein the components are communicated with one another through a connecting pipe, a first three-way pipe, a second three-way pipe, a third three-way pipe, a fourth three-way pipe and a fifth three-way pipe;
the first desulfurization tank, the second desulfurization tank and the third desulfurization tank structure comprise a methane inlet pipe, a first ceramic ball, a filter screen, a desulfurizer, a filter screen, a second ceramic ball, a flange, a methane outlet pipe and a pressure gauge which are arranged from bottom to top, wherein the first ceramic ball, the desulfurizer and the second ceramic ball are separated by the filter screen;
the inlet of the first needle valve is communicated with the output end of the rotor flow meter through a first three-way pipe, and the outlet of the first needle valve is communicated with the sampling port; an inlet of the second needle valve is communicated with the output end of the first desulfurization tank through a second three-way pipe, and an outlet of the second needle valve is communicated with the first gas outlet; an inlet of the third needle valve is communicated with the output end of the second desulfurization tank through a third three-way pipe fitting, and an outlet of the third needle valve is communicated with the second gas outlet; an inlet of the fourth needle valve is communicated with the output end of the third desulfurization tank through a fourth three-way pipe fitting, and an outlet of the fourth needle valve is communicated with the third gas outlet; an inlet of the fifth needle valve is communicated with the output end of the third desulfurization tank through a fourth three-way pipe, and an outlet of the fifth needle valve is communicated with the input end of the first desulfurization tank through a fifth three-way pipe; an inlet of the first three-way ball valve is communicated with the output end of the rotor flow meter through a first three-way pipe fitting, one outlet of the first three-way ball valve is communicated with the input end of the first desulfurization tank, and the other outlet of the first three-way ball valve is communicated with one inlet of the second three-way ball valve; one inlet of the second three-way ball valve is communicated with one outlet of the first three-way ball valve, the other inlet of the second three-way ball valve is communicated with the output end of the first desulfurization tank through a second three-way pipe fitting, and the outlet of the second three-way ball valve is communicated with the inlet of the third three-way ball valve; an inlet of the third three-way ball valve is communicated with an outlet of the second three-way ball valve, one outlet of the third three-way ball valve is communicated with an input end of the second desulfurization tank, and the other outlet of the third three-way ball valve is communicated with one inlet of the fourth three-way ball valve; and one inlet of the fourth three-way ball valve is communicated with one outlet of the third three-way ball valve, the other inlet of the fourth three-way ball valve is communicated with the output end of the second desulfurization tank through a third three-way pipe fitting, and the outlet of the fourth three-way ball valve is communicated with the input end of the third desulfurization tank.
The moving device comprises a support and four rollers, and the support is made of corrosion-resistant stainless steel.
Fixing device includes clamp, backup pad, panel, the lower part, the middle part of first digester, second digester, third digester are fixed respectively to the clamp, the bottom of first digester, second digester, third digester is supported to the backup pad, the panel openly installs rotameter, air inlet, sample connection, first gas outlet, second gas outlet, third gas outlet, first needle type valve, second needle type valve, third needle type valve, fourth needle type valve, fifth needle type valve, first tee bend ball valve, second tee bend ball valve, third tee bend ball valve, fourth tee bend ball valve.
The input end of the air inlet is communicated with the methane, and the output end of the air inlet is communicated with the input end of the rotameter.
The input end of the rotameter is communicated with the air inlet, the output end of the rotameter is communicated with the inlets of the first needle valve and the first three-way ball valve through the first three-way pipe fitting and the connecting pipe, the rotameter is made of corrosion-resistant glass, and the flow rate of biogas is 1.2-2.8 m3The range is 0-3 m3/h。
The material of first digester, second digester, third digester jar body is organic glass, and the hi-fi ratio is 9:1, and the internal diameter is 100mm, and the thickness of the jar body is 2mm, the material of flange is organic glass, and the flange external diameter is 150mm, the material of filter screen is stainless steel wire netting, and the internal diameter of filter screen is 99.5mm, and the length of mesh diagonal is 1mm, the diameter of granule is 10mm in first porcelain ball, the second porcelain ball, the internal first porcelain ball of packing of first digester, second digester, the third digester jar, the first porcelain ball of first porcelain ball, the two-layer porcelain ball of second porcelain ball, the packing height of first porcelain ball, second porcelain ball is 150mm, the desulfurizer is the fine desulfurizer of commercially available iron oxide, the packing height of desulfurizer is 400mm, the desulfurization temperature of desulfurizer is the normal atmospheric temperature.
The working pressure of the first desulfurizing tank, the second desulfurizing tank and the third desulfurizing tank is 0.01-0.1 MPa, and the measuring range of the pressure gauge (5) is 0-0.16 MPa.
The first needle valve, the second needle valve, the third needle valve, the fourth needle valve, the fifth needle valve, the first three-way ball valve, the second three-way ball valve, the third three-way ball valve and the fourth three-way ball valve are made of 316L stainless steel.
The connecting pipe is made of corrosion-resistant stainless steel, the inner diameter of the connecting pipe is 3mm, the outer diameter of the connecting pipe is 5mm, the pipe diameters of the first three-way pipe fitting, the second three-way pipe fitting, the third three-way pipe fitting, the fourth three-way pipe fitting and the fifth three-way pipe fitting are equal-diameter positive tee joints, and the connecting pipe is made of corrosion-resistant stainless steel.
The first desulfurization tank, the second desulfurization tank and the third desulfurization tank are communicated through connecting pipes, and the first desulfurization tank and the second desulfurization tank are in a serial state and the third desulfurization tank is in a standby state by adjusting the opening degree of a third needle valve and the steering directions of a first three-way ball valve, a second three-way ball valve and a third three-way ball valve; when the desulfurizer in the first desulfurization tank is close to the saturated sulfur capacity, the first desulfurization tank is in an emptying state by adjusting the second needle valve, the desulfurizer in the first desulfurization tank is regenerated at normal temperature, and the second desulfurization tank and the third desulfurization tank are in a serial state by adjusting the opening degrees of the third needle valve and the fourth needle valve and the steering of the first three-way ball valve, the second three-way ball valve and the fourth three-way ball valve; when the desulfurizer in the second desulfurization tank is close to the saturated sulfur capacity, the second desulfurization tank is in a regeneration state by adjusting the opening degree of a third needle valve, and the third desulfurization tank and the first desulfurization tank are in a serial state by adjusting the opening degrees of the second needle valve and a fifth needle valve and the steering directions of a first three-way ball valve, a second three-way ball valve, a third three-way ball valve and a fourth three-way ball valve; when the desulfurizer in the third desulfurization tank is close to the saturated sulfur capacity, the third desulfurization tank is in a regeneration state by adjusting the fourth needle valve, and the first desulfurization tank and the second desulfurization tank are in a serial state by adjusting the opening degrees of the third needle valve and the fifth needle valve and the steering directions of the first three-way ball valve, the second three-way ball valve and the third three-way ball valve; two desulfurization tanks are used in a dual-purpose mode, and are switched to be used, the two desulfurization tanks are connected in series for desulfurization, and the third desulfurization tank is used for desulfurization agent regeneration, so that desulfurization operation and regeneration operation are circularly performed.
The first desulfurizing tank, the second desulfurizing tank and the third desulfurizing tank do not need to take out filler airing in the regeneration process of the desulfurizing agent, the regeneration air quantity is controlled only by adjusting the opening degrees of the second needle valve, the third needle valve and the fourth needle valve, the whole regeneration process can be completed, the regeneration temperature is normal temperature, and the fine desulfurizing agent can be regenerated for 3-5 times.
The nearly saturated sulfur capacity refers to two desulfurization tanks in a series desulfurization state, the color of a desulfurizer layer contacted with an upper filter screen of the first desulfurization tank into which methane enters slightly changes, and the change can be observed by comparing the color of the desulfurizer layer at the same position in the other desulfurization tank connected in series through an organic glass tank body.
Compared with the prior art, the dry-method biogas desulfurization device has the following advantages:
(1) three desulfurization tanks are arranged, the connection states of the first desulfurization tank, the second desulfurization tank and the third desulfurization tank are switched by combining and adjusting the second needle valve, the third needle valve, the fourth needle valve, the fifth needle valve, the first three-way ball valve, the second three-way ball valve, the third three-way ball valve and the fourth three-way ball valve, the desulfurization agent of the third desulfurization tank is in a regeneration state while the two desulfurization tanks are connected in series for desulfurization operation, the desulfurization agent does not need to be taken out during regeneration, the desulfurization operation and the regeneration operation can be carried out at normal temperature, the desulfurization agent can be regenerated for 3-5 times in such a circulating way, the utilization rate of the desulfurization agent is greatly improved, and the operation is simple and efficient;
(2) the device can realize desulfurization through two-stage circulation without periodically carrying out desulfurization on the gas outlet H2The content of S is measured, the material of the tank body of the desulfurizing tank is transparent organic glass, only the color change of the desulfurizing agent needs to be judged when a valve is switched, and meanwhile, the problem that the desulfurizing agent is instantaneously penetrated due to unstable methane flow rate control can be avoided, so that the H content is improved2The removal rate of S;
(3) by utilizing the mobile device, the desulfurization site can be changed, and the desulfurization requirements of different places are met;
(4) the biogas enters from the bottom of each desulfurization tank and flows out from the top of each desulfurization tank, and the resistance is greatly reduced by utilizing the chimney effect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a rear view of the present invention;
FIG. 4 is a top view of the present invention;
FIG. 5 is a flow chart of the present invention;
FIG. 6 is a schematic view of the construction of a devulcanizer according to the present invention;
FIG. 7 is a schematic view of a filter screen according to the present invention;
in the figure, 1. rotor flow meter; 2. a first devulcanizer; 3. a second devulcanizer; 4. a third devulcanizer; 5. a pressure gauge; 6. a flange; 7. a biogas outlet pipe; 8. a first ceramic ball; 9. filtering with a screen; 10. a desulfurizing agent; 11. a biogas inlet pipe; 12. a connecting pipe; 13. a first tee fitting; 14. a second tee fitting; 15. a third tee fitting; 16. a fourth tee fitting; 17. a fifth tee pipe fitting; 18. a second ceramic ball; 21. an air inlet; 22. a sampling port; 23. a first air outlet; 24. a second air outlet; 25. a third air outlet; 31. a first needle valve; 32. a second needle valve; 33. a third needle valve; 34. a fourth needle valve; 35. a fifth needle valve; 36. a first three-way ball valve; 37. a second three-way ball valve; 38. a third three-way ball valve; 39. a fourth three-way ball valve; 40. a fixing device; 401. clamping a hoop; 402. a support plate; 403. a panel; 50. a mobile device; 501. a support; 502. and a roller.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediary, or the two elements may be in communication. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations. The following are specific examples.
Example 1 comparison of Single-pot desulfurization with two-stage recycle desulfurization
The conventional dry desulfurization device is generally provided with one desulfurization tank or two desulfurization tanks connected in parallel, and the desulfurization tank is used as H at an air outlet2S content>20mg/Nm3In the meantime, the desulfurizing agent has to be replaced or regenerated, and H at the gas outlet2The content of S must be determined by repeated measurement, and the operation process is complicated; second, when H of the outlet is measured2S gas content>20mg/Nm3When the biogas enters the desulfurizing tank from bottom to top, the desulfurizing agent layer filled in the desulfurizing tank cannot be fully desulfurized on the upper layer of the desulfurizing agent layer, so that the utilization rate of the desulfurizing agent is reduced.
In order to fundamentally improve the utilization rate and H of the desulfurizer2The problem of S removal rate is that the dry method biogas desulfurization device is subjected to performance parameter test, and the test process is as follows: the raw material gas is marsh gas compressed by a compressor, the pressure of the marsh gas is 0.1MPa, and the sulfur content of the compressed marsh gas is 710mg/Nm3And respectively carrying out comparative testing on the desulfurization performance according to the two schemes, wherein the testing conditions are shown in table 1.
TABLE 1 test conditions
| Desulfurizing agent | Sulfur capacity of desulfurizing agent | Height to diameter ratio of filler | Single pot of filler/kg | Space velocity/h-1 | pressure/MPa |
| Commercially |
10％ | 4:1 | 2.7 | 500 | 0.1 |
(1) Single-pot desulfurization: the first desulfurizing tank 2, the second desulfurizing tank 3 and the third desulfurizing tank 4 in the device are used for independently carrying out desulfurizing operation and regenerating operation respectively, 2.7kg of desulfurizing agent is respectively filled, namely 8.1kg of desulfurizing agent is filled in total, according to the test conditions shown in the table 1, the desulfurizing test is carried out on the premise of ensuring stable pressure and airspeed, firstly, the methane is introduced into the first desulfurizing tank 2, at the moment, the second desulfurizing tank 3 and the third desulfurizing tank 4 are standby, and when the desulfurizing agent 10 in the first desulfurizing tank 2 reaches the penetrating sulfur capacity (H)2S content>20mg/Nm3) By adjusting the turning directions of the first three-way ball valve 36, the second three-way ball valve 37, the third three-way ball valve 38 and the fourth three-way ball valve 39, the working state of the first desulfurization tank 2 is switched, the first desulfurization tank 2 is switched to regeneration operation, the second desulfurization tank 3 performs desulfurization operation, the third desulfurization tank 4 is still standby, and when the desulfurizer 10 in the second desulfurization tank 3 reaches the penetration sulfur capacity (H)2S content>20mg/Nm3) Through adjusting the turning directions of the first three-way ball valve 36, the second three-way ball valve 37, the third three-way ball valve 38 and the fourth three-way ball valve 39, the second desulfurizing tank 3 is switched to a regeneration operation state, the third desulfurizing tank 4 carries out the desulfurizing operation, the regenerated first desulfurizing tank 2 is standby, the circulation is carried out, the first desulfurizing tank 2, the second desulfurizing tank 3 and the third desulfurizing tank 4 are all desulfurized and regenerated once to form a period, the first period can be desulfurized for 30 days (the day here is 24h, the same below), five periods can be regenerated and used before the desulfurizing agent 10 is totally invalid, the single desulfurizing tank desulfurization test knot is formedAs shown in table 2.
TABLE 2 Single pot desulfurization test results
| First period | Second period | The third period | Fourth period of time | The fifth period | Total length of time |
| 30 days | 27 |
23 |
15 |
6 days | 101 days |
(2) Secondary circulating desulfurization: and (2) performing secondary circulating desulfurization by using three desulfurization tanks, respectively filling 2.7kg of desulfurizing agent into the first desulfurization tank 2, the second desulfurization tank 3 and the third desulfurization tank 4, namely filling 8.1kg of desulfurizing agent in total, performing desulfurization test on the premise of ensuring stable pressure and airspeed according to the test conditions in the table 1, and introducing biogas into the device. The opening degree of the third needle valve 33 and the turning directions of the first three-way ball valve 36, the second three-way ball valve 37 and the third three-way ball valve 38 are adjusted, so that the first desulfurization tank 2 and the second desulfurization tank 3 are in a serial desulfurization state, and the third desulfurization tank 4 is in a standby state; when the desulfurizer 10 in the first desulfurization tank 2 is close to the saturated sulfur capacity, the first desulfurization tank 2 is switched to an emptying state by adjusting the second needle valve 32, the desulfurizer 10 in the first desulfurization tank 2 is regenerated at normal temperature, and the second desulfurization tank 3 and the third desulfurization tank 4 are in a serial desulfurization state by adjusting the opening degrees of the third needle valve 33 and the fourth needle valve 34 and the turning directions of the first three-way ball valve 36, the second three-way ball valve 37 and the fourth three-way ball valve 39; when the desulfurizer 10 in the second desulfurization tank 3 is close to the saturated sulfur capacity, the second desulfurization tank 3 is switched to the regeneration state by adjusting the opening degree of the third needle valve 33, and the third desulfurization tank 4 and the first desulfurization tank 2 are in the serial desulfurization state by adjusting the opening degrees of the second needle valve 32 and the fifth needle valve 35 and the turning directions of the first three-way ball valve 36, the second three-way ball valve 37, the third three-way ball valve 38 and the fourth three-way ball valve 39; when the desulfurizer 10 in the third desulfurization tank 4 is close to the saturated sulfur capacity, the third desulfurization tank 4 is switched to the regeneration state by adjusting the fourth needle valve 34, and the first desulfurization tank 2 and the second desulfurization tank 3 are in the serial desulfurization state by adjusting the opening degrees of the third needle valve 33 and the fifth needle valve 35 and the steering directions of the first three-way ball valve 36, the second three-way ball valve 37 and the third three-way ball valve 38; namely, the two desulfurization tanks are used in a dual-purpose manner and switched to use, and the desulfurization operation and the regeneration operation are circularly performed by performing the desulfurization operation in series with the desulfurization operation in the two desulfurization tanks and performing the regeneration operation of the desulfurizing agent 10 with the third desulfurization tank. The period of the secondary circulation desulfurization refers to the three desulfurization operations of the two-two combination of the three desulfurization tanks for three times, namely, the desulfurization of the desulfurization tank 2+ the 3 desulfurization tank and the regeneration of the desulfurization tank 4, the desulfurization of the desulfurization tank 3+ the 4 desulfurization tank and the regeneration of the desulfurization tank 2, and the desulfurization of the desulfurization tank 4+ the 2 desulfurization tank and the regeneration of the desulfurization tank 3. Through tests, five periods of desulfurization cycles can be carried out in total before the desulfurization capacity of the desulfurizing agent is failed, and the results of the secondary cycle desulfurization test are shown in table 3.
TABLE 3 two-stage cycle desulfurization test results
| First period | Second period | The third period | Fourth period of time | The fifth period | Total length of |
| 40 |
37 days | 30 |
21 |
9 days | 137 days |
(3) And (3) comparison: compared with single-tank desulfurization, the utilization rate of the desulfurizer can be improved by secondary circulating desulfurization, and the test result shows that the utilization rate of the desulfurizer is improved by 35 percent; ② in the testing process, H is frequently carried out on the outlet methane by single-tank desulfurization2S content test to avoid untimely replacement after penetration, H in the test process2S is inevitably discharged into the air, thereby affecting H2S removal rate, and the secondary circulation desulfurization does not need H in the gas outlet2The S content is frequently tested because when the desulfurizer 10 of the first desulfurization tank into which the biogas enters is nearly saturated, the desulfurizer 10 in the second desulfurization tank is far from being penetrated through after the test, and there is no need to worry about H2S is discharged, and only the change of the color of the desulfurizer needs to be observed for regeneration in the desulfurization process, thereby improving H to a certain extent2The removal rate of S; ③ through H in the first air outlet 23, the second air outlet 24 and the third air outlet 252Measuring S content and calculating to obtain H2The removal rate of S is improved by about 7 percent, and the high efficiency of operation is greatly improved. Single pot desulfurization and two-stage circulation desulfurization detectionThe test results are shown in Table 4.
TABLE 4 comparison of test results for single-pot desulfurization and two-stage cyclic desulfurization
| Period of use | Utilization rate of desulfurizing agent | H2Removal rate of S | Operability of | |
| Single pot desulfurization and desulfurization | 101 days | 67％ | 91％ | Low efficiency |
| Two-stage circulating desulfurization | 137 days | 91％ | 98％ | High efficiency |
EXAMPLE 2 regeneration of desulfurizing agent
The normal temperature ferric oxide desulfurizer reacts with hydrogen sulfide to generate iron sulfide and elemental sulfur, thereby removing the hydrogen sulfide, and the chemical reaction equation is as follows: fe2O3·H2O+3H2S＝Fe2S3·H2O+3H2O
Fe2O3·H2O+3H2S＝2FeS+S+4H2O
As can be seen from the above reaction equation, Fe2O3Absorption of H2S to Fe2S3With the continuous generation of biogas, iron oxide absorbs H2S, when absorbing H2S reaches a certain amount, H2The removal rate of S will be greatly reduced until failure. Fe2S3Is reductively regenerable with O2And H2O can be reduced to Fe by chemical reaction2O3The regeneration principle is as follows:
2Fe2S3·H2O+3O2＝2Fe2O3·H2O+6S
the regeneration air quantity is controlled by adjusting the opening degrees of the second needle valve 32, the third needle valve 33 and the fourth needle valve 34, so that the whole regeneration process O can be satisfied2The saturated water contained in the biogas from the landfill and the biogas fermentation tank can completely meet the requirement of the desulfurizer on the moisture by reduction. After the opening degrees of the second needle valve 32, the third needle valve 33 and the fourth needle valve 34 are respectively adjusted, the first desulfurizing tank 2, the second desulfurizing tank 3 and the third desulfurizing tank 4 are respectively in an emptying state, namely, the desulfurizing agent 10 of one desulfurizing tank is regenerated, the other two desulfurizing tanks are separated from the desulfurizing tank for serial desulfurization operation, at the moment, the condition that the marsh gas can enter the desulfurizing tank in the emptying state to influence the regeneration operation is not needed to be worried, the desulfurizing tank in the regeneration state can be isolated from the marsh gas only by adjusting the turning directions of the first three-way ball valve 36, the second three-way ball valve 37, the third three-way ball valve 38 and the fourth three-way ball valve 39, and the marsh gas can enter the other two desulfurizing tanks in the serial state to be desulfurized. The process for regenerating the desulfurizer comprises the following steps:
Claims (9)
1. a biogas dry desulphurization device is characterized in that: the device structurally comprises a rotor flow meter (1), a first desulfurization tank (2), a second desulfurization tank (3), a third desulfurization tank (4), an air inlet (21), a sampling port (22), a first air outlet (23), a second air outlet (24), a third air outlet (25), a first needle valve (31), a second needle valve (32), a third needle valve (33), a fourth needle valve (34), a fifth needle valve (35), a first three-way ball valve (36), a second three-way ball valve (37), a third three-way ball valve (38), a fourth three-way ball valve (39), a fixing device (40) and a moving device (50), wherein the components are communicated with one another through a connecting pipe (12), a first three-way pipe (13), a second three-way pipe (14), a third three-way pipe (15), a fourth three-way pipe (16) and a fifth three-way pipe (17);
the first desulfurization tank (2), the second desulfurization tank (3) and the third desulfurization tank (4) comprise tank structures of a biogas inlet pipe (11), a first ceramic ball (8), a filter screen (9), a desulfurizer (10), a filter screen (9), a second ceramic ball (18), a flange (6), a biogas outlet pipe (7) and a pressure gauge (5) which are arranged from bottom to top, wherein the first ceramic ball (8), the desulfurizer (10) and the second ceramic ball (18) are separated by the filter screen (9), the biogas inlet pipe (11) is arranged at the bottoms of the tank bodies of the first desulfurization tank (2), the second desulfurization tank (3) and the third desulfurization tank (4), the biogas outlet pipe (7) is arranged at the top of the tank bodies, and the pressure gauge (5) is arranged at the top of the tank bodies; an inlet of the first needle valve (31) is communicated with an output end of the rotameter (1) through a first three-way pipe (13), and an outlet of the first needle valve (31) is communicated with the sampling port (22);
an inlet of the second needle valve (32) is communicated with an output end of the first desulfurization tank (2) through a second three-way pipe (14), and an outlet of the second needle valve (32) is communicated with the first air outlet (23);
an inlet of the third needle valve (33) is communicated with an output end of the second desulfurization tank (3) through a third three-way pipe (15), and an outlet of the third needle valve (33) is communicated with the second air outlet (24);
an inlet of the fourth needle valve (34) is communicated with an output end of the third desulfurization tank (4) through a fourth three-way pipe (16), and an outlet of the fourth needle valve (34) is communicated with a third air outlet (25);
an inlet of the fifth needle valve (35) is communicated with an output end of the third desulfurization tank (4) through a fourth three-way pipe (16), and an outlet of the fifth needle valve (35) is communicated with an input end of the first desulfurization tank (2) through a fifth three-way pipe (17);
an inlet of the first three-way ball valve (36) is communicated with an output end of the rotameter (1) through a first three-way pipe (13), one outlet of the first three-way ball valve (36) is communicated with an input end of the first desulfurization tank (2), and the other outlet of the first three-way ball valve (36) is communicated with an inlet of the second three-way ball valve (37);
one inlet of the second three-way ball valve (37) is communicated with one outlet of the first three-way ball valve (36), the other inlet of the second three-way ball valve (37) is communicated with the output end of the first desulfurization tank (2) through a second three-way pipe (14), and the outlet of the second three-way ball valve (37) is communicated with the inlet of the third three-way ball valve (38);
an inlet of the third three-way ball valve (38) is communicated with an outlet of the second three-way ball valve (37), one outlet of the third three-way ball valve (38) is communicated with an input end of the second desulfurization tank (3), and the other outlet of the third three-way ball valve (38) is communicated with an inlet of the fourth three-way ball valve (39);
an inlet of the fourth three-way ball valve (39) is communicated with an outlet of the third three-way ball valve (38), the other inlet of the fourth three-way ball valve (39) is communicated with the output end of the second desulfurization tank (3) through a third three-way pipe (15), and an outlet of the fourth three-way ball valve (39) is communicated with the input end of the third desulfurization tank (4);
the first desulfurization tank (2), the second desulfurization tank (3) and the third desulfurization tank (4) are communicated through a connecting pipe (12), the first desulfurization tank (2) and the second desulfurization tank (3) are in a serial state, and the third desulfurization tank (4) is in a standby state by adjusting the opening degree of a third needle valve (33) and the steering directions of a first three-way ball valve (36), a second three-way ball valve (37) and a third three-way ball valve (38); when a desulfurizer (10) in a first desulfurization tank (2) is close to a saturated sulfur capacity, the first desulfurization tank (2) is in an emptying state by adjusting a second needle valve (32), the desulfurizer (10) in the first desulfurization tank (2) is regenerated at normal temperature, and the second desulfurization tank (3) and a third desulfurization tank (4) are in a series state by adjusting the opening degrees of a third needle valve (33) and a fourth needle valve (34) and the steering directions of a first three-way ball valve (36), a second three-way ball valve (37) and a fourth three-way ball valve (39); when a desulfurizer (10) in the second desulfurization tank (3) is close to a saturated sulfur capacity, the second desulfurization tank (3) is in a regeneration state by adjusting the opening degree of a third needle valve (33), and the third desulfurization tank (4) and the first desulfurization tank (2) are in a serial desulfurization state by adjusting the opening degrees of the second needle valve (32) and a fifth needle valve (35) and the turning directions of a first three-way ball valve (36), a second three-way ball valve (37), a third three-way ball valve (38) and a fourth three-way ball valve (39); when a desulfurizer (10) in a third desulfurization tank (4) is close to a saturated sulfur capacity, the third desulfurization tank (4) is in a regeneration state by adjusting the opening degree of a fourth needle valve (34), and the first desulfurization tank (2) and the second desulfurization tank (3) are in a serial state by adjusting the opening degrees of a third needle valve (33) and a fifth needle valve (35) and the turning directions of a first three-way ball valve (36), a second three-way ball valve (37) and a third three-way ball valve (38); namely, the two desulfurization tanks are used for both purposes and are switched, the two desulfurization tanks are used for desulfurization in series, and the third desulfurization tank is used for regeneration of the desulfurizing agent (10), so that the desulfurization operation and the regeneration operation are circularly carried out.
2. The biogas dry desulphurization device according to claim 1, characterized in that: the moving device (50) comprises a bracket (501) and four rollers (502), wherein the bracket (501) is made of corrosion-resistant stainless steel; the fixing device (40) comprises a clamping hoop (401), a supporting plate (402) and a panel (403), the clamp (401) is respectively fixed at the lower part and the middle part of the first desulfurizing tank (2), the second desulfurizing tank (3) and the third desulfurizing tank (4), the supporting plate (402) supports the bottoms of the first desulfurizing tank (2), the second desulfurizing tank (3) and the third desulfurizing tank (4), the front face of the panel (403) is provided with a rotor flow meter (1), an air inlet (21), a sampling port (22), a first air outlet (23), a second air outlet (24), a third air outlet (25), a first needle valve (31), a second needle valve (32), a third needle valve (33), a fourth needle valve (34), a fifth needle valve (35), a first three-way ball valve (36), a second three-way ball valve (37), a third three-way ball valve (38) and a fourth three-way ball valve (39).
3. The method of claim 1The methane dry-method desulphurization device is characterized in that: the input end of the air inlet (21) is communicated with the biogas, and the output end of the air inlet (21) is communicated with the input end of the rotameter (1); the input end of the rotameter (1) is communicated with the air inlet (21), the output end of the rotameter (1) is communicated with the inlets of the first needle valve (31) and the first three-way ball valve (36) through the connecting pipe (12) and the first three-way pipe (13), the rotameter is made of corrosion-resistant glass, and the flow rate of the biogas is 1.2-2.8 m3The range is 0-3 m3/h。
4. The biogas dry desulphurization device according to claim 1, characterized in that: the material of the first desulfurizing tank (2), the second desulfurizing tank (3) and the third desulfurizing tank (4) is transparent organic glass, the height-diameter ratio is 9:1, the inner diameter is 100mm, the thickness of the tank body is 2mm, the material of the flange (6) is organic glass, the outer diameter of the flange is 150mm, the material of the filter screen (9) is a stainless steel wire mesh, the inner diameter of the filter screen (9) is 99.5mm, the length of a mesh diagonal is 1mm, the filling height of the first desulfurizing tank (2), the second desulfurizing tank (3) and the third desulfurizing tank (4) is 150mm by filling a first porcelain ball (8) and a second porcelain ball (18) into the tank body, the inner diameter of the first porcelain ball (8) and the second porcelain ball (18) is 10mm, the filling height of the first porcelain ball (8) and the second porcelain ball (18) is 150mm, the desulfurizing agent (10) is a commercial iron oxide fine desulfurizing agent, the filling height of the desulfurizing agent (10) is 400mm, the desulfurization temperature is normal temperature.
5. The biogas dry desulphurization device according to claim 1, characterized in that: the working pressure of the first desulfurizing tank (2), the second desulfurizing tank (3) and the third desulfurizing tank (4) is 0.01-0.1 MPa, and the measuring range of the pressure gauge (5) is 0-0.16 MPa.
6. The biogas dry desulphurization device according to claim 1, characterized in that: the first needle valve (31), the second needle valve (32), the third needle valve (33), the fourth needle valve (34), the fifth needle valve (35), the first three-way ball valve (36), the second three-way ball valve (37), the third three-way ball valve (38) and the fourth three-way ball valve (39) are made of 316L stainless steel.
7. The biogas dry desulphurization device according to claim 1, characterized in that: the connecting pipe (12) is made of corrosion-resistant stainless steel, the inner diameter of the connecting pipe is 3mm, the outer diameter of the connecting pipe is 5mm, the pipe diameters of the first three-way pipe fitting (13), the second three-way pipe fitting (14), the third three-way pipe fitting (15), the fourth three-way pipe fitting (16) and the fifth three-way pipe fitting (17) are equal-diameter positive tee joints, and the connecting pipe is made of corrosion-resistant stainless steel.
8. The biogas dry desulphurization device according to claim 1, characterized in that: first digester (2), second digester (3), third digester (4) need not to take off the filler sunning at the regeneration process of desulfurizer (10), only need through the aperture of combination regulation second needle valve (32), third needle valve (33), fourth needle valve (34), control regeneration air volume, accomplish whole regeneration process promptly, regeneration temperature is the normal atmospheric temperature, desulfurizer (10) regeneration 3 ~ 5 times.
9. The biogas dry desulphurization device according to claim 1, characterized in that: the nearly saturated sulfur capacity means that the two desulfurization tanks are in a serial desulfurization state, the color of the desulfurizer (10) layer contacted with the upper filter screen (9) of the first desulfurization tank into which methane enters slightly changes, and the color of the desulfurizer (10) layer at the same position in the other desulfurization tank connected in series is observed through the organic glass tank body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810566384.1A CN108659904B (en) | 2018-06-05 | 2018-06-05 | Methane dry-method desulphurization device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810566384.1A CN108659904B (en) | 2018-06-05 | 2018-06-05 | Methane dry-method desulphurization device |
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| CN108659904B true CN108659904B (en) | 2021-01-19 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101574622A (en) * | 2008-05-05 | 2009-11-11 | 韩松 | Dry-method desulphurization and deodorization technology with high efficiency low pressure drop |
| CN205055809U (en) * | 2015-08-28 | 2016-03-02 | 辽宁科技学院 | Dry process normal atmospheric temperature desulfurization experimental apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3002649A1 (en) * | 1980-01-25 | 1981-08-06 | Linde Ag, 6200 Wiesbaden | Sepg. sulphur di:oxide from carbon di:oxide and water vapour mixt. - obtd. from desulphurising plant, used to remove sulphur from combustion fumes |
| CN103316565B (en) * | 2013-06-16 | 2015-03-04 | 中国矿业大学(北京) | Efficient enrichment and separation equipment for ultralow-concentration gas |
| CN203494357U (en) * | 2013-10-15 | 2014-03-26 | 盘锦道博尔石油新技术开发有限公司 | Gas separation pretreatment equipment |
| CN206152625U (en) * | 2016-10-31 | 2017-05-10 | 世纪华扬环境工程有限公司 | A exhaust treatment device for H2S is gaseous to be administered |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101574622A (en) * | 2008-05-05 | 2009-11-11 | 韩松 | Dry-method desulphurization and deodorization technology with high efficiency low pressure drop |
| CN205055809U (en) * | 2015-08-28 | 2016-03-02 | 辽宁科技学院 | Dry process normal atmospheric temperature desulfurization experimental apparatus |
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