CN210751966U - Compound fertilizer production tail gas processing apparatus - Google Patents
Compound fertilizer production tail gas processing apparatus Download PDFInfo
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- CN210751966U CN210751966U CN201921406030.7U CN201921406030U CN210751966U CN 210751966 U CN210751966 U CN 210751966U CN 201921406030 U CN201921406030 U CN 201921406030U CN 210751966 U CN210751966 U CN 210751966U
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Abstract
The utility model discloses a compound fertilizer production tail gas treatment device, which comprises a two-stage cyclone dust collector, a Venturi scrubber, a first cleaning solution circulating device, a washing device, a second cleaning solution circulating device, a fan and an electrostatic demister; the two-stage cyclone dust collector, the Venturi scrubber, the washing device, the fan and the electrostatic demister are sequentially connected; the first washing liquid circulating device is connected with the Venturi scrubber and is used for recovering the washing liquid and circulating the washing liquid into the Venturi scrubber again; the washing device comprises a washer connected with the Venturi washer and a gas-liquid separation tower connected with the washer and the fan simultaneously; the second washing liquid circulating device is connected with the washer and used for recovering the washing liquid and recycling the washing liquid to the washer again. By the proposal, the utility model discloses effectively solved the processing problem of dust, floating dust and ammonia in the tail gas, made the emission of tail gas accord with emission standard well.
Description
Technical Field
The utility model relates to a chemical fertilizer tail gas treatment technical field, concretely relates to compound fertilizer production tail gas processing apparatus.
Background
The compound fertilizer has the advantages of high nutrient content, few side ingredients, good physical properties and the like, plays an important role in balancing fertilization, improving the utilization rate of the fertilizer and promoting the high and stable yield of crops, but can generate a large amount of smoke and harmful gas in the generation process, and easily causes great harm to the environment, so that the compound fertilizer is necessary to be treated well in the tail gas emission process.
The tail gas generated in the production process of the compound fertilizer has complex components, mainly comprises dust, floating dust, ammonia and the like, and can cause environmental pollution if not treated properly. Most of the traditional methods adopt a dust removal gravity settling means, the dust removal rate can only reach about 80% after the treatment by the method, a large amount of harmful substances are still discharged into the atmosphere along with tail gas, the environmental pollution is caused, and meanwhile, the raw material loss is easily caused.
Therefore, there is a need for improvement of the existing tail gas treatment mode for compound fertilizer production.
SUMMERY OF THE UTILITY MODEL
The not enough to above-mentioned prior art, the utility model provides a compound fertilizer production tail gas processing apparatus can effectively improve the treatment effect of tail gas, realizes the harmless emission of tail gas in the at utmost.
In order to achieve the above object, the utility model adopts the following technical scheme:
a compound fertilizer production tail gas treatment device comprises a two-stage cyclone dust collector for filtering most dust of compound fertilizer tail gas, a Venturi scrubber for realizing tail gas prewashing, a first cleaning solution circulating device, a washing device, a second cleaning solution circulating device, a fan and an electrostatic demister, wherein the first cleaning solution circulating device is connected with the second cleaning solution circulating device; the two-stage cyclone dust collector, the Venturi scrubber, the washing device, the fan and the electrostatic demister are sequentially connected; the first washing liquid circulating device is connected with the Venturi scrubber and is used for recovering the washing liquid and circulating the washing liquid into the Venturi scrubber again; the washing device comprises a scrubber connected with the Venturi scrubber and used for secondary washing of tail gas, and a gas-liquid separation tower connected with the scrubber and the fan simultaneously; and the second washing liquid circulating device is connected with the washer and used for recovering the washing liquid and circulating the washing liquid into the washer again.
Specifically, first washing liquid circulating device holds the pond including the washing liquid that passes through pipeline and venturi scrubber's liquid outlet intercommunication to and pump inlet holds the circulating pump that pond intercommunication, pump export and venturi scrubber's spray line are connected with the washing liquid.
Further, the second washing liquid circulating device is identical to the first washing liquid circulating device in structure.
Preferably, the scrubber is a venturi scrubber.
Or the scrubber comprises a Venturi tube, a spraying mechanism and a middle-section throat tube section adjusting mechanism; the Venturi tube comprises an upper section contraction tube, a middle section throat tube and a lower section flared tube which are sequentially fixed into an integral structure; the upper-section contraction pipe is communicated with an air outlet of the cyclone dust collector; the spraying mechanism comprises a first spray head extending into the upper section of the shrinkage pipe and second spray heads arranged on the pipe wall of the upper section of the shrinkage pipe and uniformly arranged around the pipe wall; the pump outlet of a circulating pump in the second washing liquid circulating device is simultaneously communicated with the first spray nozzles and all the second spray nozzles through pipelines; the flared pipe is respectively provided with an air outlet and a liquid outlet, wherein the air outlet is communicated with the gas-liquid separation tower, and the liquid outlet is communicated with a washing liquid containing pool in the second washing liquid circulating device; the middle-section throat pipe section adjusting mechanism extends into the Venturi tube from outside and is used for adjusting the size of the middle-section throat pipe section to realize gas-liquid load adjustment and keeping the flow velocity of the middle-section throat pipe stable.
And the middle-section throat pipe section adjusting mechanism comprises a screw rod and a rhombohedral body adjusting block, wherein one end of the screw rod is connected with an adjusting wheel, the other end of the screw rod extends into the lower-section flared pipe and is in threaded connection with the lower-section flared pipe, and the rhombohedral body adjusting block is connected with the other end of the screw rod and is used for adjusting the section size of the middle-section throat pipe.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a set up two-stage cyclone, venturi scrubber, washing unit, can effectively get rid of dust, dust and ammonia in the tail gas, and through setting up the electrostatic foam remover, can get rid of the foam and the aerosol that the tail gas after the washing contains, finally realize the purification of tail gas (dust collection efficiency can reach more than 93%), make it reach emission standard.
(2) The utility model discloses a washing liquid circulating device design can realize the circulation recovery and the utilization of washing liquid, avoids the wasting of resources.
(3) The utility model discloses a scrubber adopts the design of upper segment shrink tube + middle section choke + hypomere flared tube + first shower nozzle + surrounding type's second shower nozzle, can make spun water smoke ensure the gas-liquid mixture space of full cross-section, avoids taking place side flow or wall flow, has ensured follow-up mixture dust removal and cooling effect.
(4) The utility model discloses a scrubber has still set up middle section choke cross-section adjustment mechanism, through the design that adopts regulating wheel + screw rod + rhombohedral body regulating block, can adjust the sectional area size of middle section choke, ensures that the gas-liquid flow rate of middle section choke department is stable, guarantees to mix the washing humidification effect to satisfy the washing that different gases let in the volume, it is nimble more reliable in using.
(5) The utility model discloses to a great extent has promoted compound fertilizer production tail gas treatment effect, and through continuous monitoring, ammonia average emission mass concentration in the tail gas is steerable at 45mg/m3About, the mass concentration of dust emission can be controlled at 32mg/m3Left and right. Therefore, the utility model discloses be suitable for popularization and application.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of the scrubber.
Wherein, the names corresponding to the reference numbers are:
1-two-stage cyclone dust collector, 2-venturi scrubber, 3-scrubbing liquid holding pool, 4-circulating pump, 5-scrubber, 501-venturi tube, 5011-upper contraction tube, 5012-middle throat tube, 5013-lower flaring tube, 502-first nozzle, 503-second nozzle, 504-regulating wheel, 505-screw, 506-rhombohedral regulating block, 6-gas-liquid separation tower, 7-second scrubbing liquid circulating device, 8-fan and 9-electrostatic demister.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
Examples
The utility model provides a compound fertilizer production tail gas processing apparatus can effectively improve the treatment effect of tail gas, realizes the harmless emission of tail gas in the at utmost. As shown in fig. 1, the utility model mainly comprises a two-stage cyclone dust collector 1, a venturi scrubber 2, a first washing liquid circulating device, a washing device, a second washing liquid circulating device 7, a fan 8 and an electrostatic demister 9.
The two-stage cyclone dust collector 1 (namely two groups of parallel cyclone dust collectors are adopted) is used for introducing tail gas and filtering most dust in the tail gas, and an air outlet of the two-stage cyclone dust collector is communicated with an air inlet of the Venturi scrubber 2. The venturi scrubber 2 is used for pre-scrubbing the entering tail gas. The venturi scrubber of the present invention is prior art, and its structural design and scrubbing principle are common knowledge, and will not be elaborated herein. And first washing liquid circulating device then be arranged in retrieving washing liquid and circulating to the venturi scrubber once more, its washing liquid that includes the liquid outlet intercommunication through pipeline and venturi scrubber 2 holds pond 3 to and pump inlet and washing liquid hold pond 3 intercommunication, pump export and venturi scrubber 2 spray piping connection's circulating pump 4.
The washing device is used for realizing secondary washing of the tail gas, realizing absorption of harmful gases (particularly ammonia), and reducing the temperature and dust content of the tail gas. The scrubbing apparatus includes a scrubber 5 connected to the venturi scrubber 2, and a gas-liquid separation tower 6 connected to both the scrubber 5 and a fan 8. The second washing liquid circulating device 7 is structurally the same as the first washing liquid circulating device and is used for recovering the washing liquid and recycling the washing liquid to the washer again.
The utility model provides a scrubber can be venturi scrubber, also can adopt following design:
as shown in fig. 2, the scrubber includes a venturi 501, a spray mechanism, and a middle throat section adjustment mechanism. The venturi tube 501 comprises an upper section contraction tube 5011, a middle section throat tube 5012 and a lower section flared tube 5013 which are sequentially fixed into an integral structure; the upper-section shrinkage pipe 5011 is communicated with an air outlet of the cyclone dust collector 1. The spraying mechanism comprises a first spray head 502 extending into the upper section of the shrinkage pipe, and second spray heads 503 which are arranged on the pipe wall of the upper section of the shrinkage pipe 5011 and uniformly arranged around the pipe wall. The pump outlet of the circulating pump in the second washing liquid circulating device 7 is simultaneously communicated with the first spray nozzles 502 and all the second spray nozzles through pipelines; and an exhaust port and a liquid discharge port are respectively arranged on the flared pipe 5013, wherein the exhaust port is communicated with the gas-liquid separation tower 6, and the liquid discharge port is communicated with a washing liquid containing pool in the second washing liquid circulating device 7.
The middle-section throat pipe section adjusting mechanism is used for adjusting the size of the middle-section throat pipe section when the gas quantity changes to realize gas-liquid load adjustment and keep the flow velocity of the middle-section throat pipe stable, thereby ensuring the mixed washing humidifying effect and pressure drop. Specifically, the middle-section throat section adjusting mechanism comprises a screw 505 with one end connected with an adjusting wheel 504 and the other end extending into the lower-section flared tube 5013 and in threaded connection with the lower-section flared tube, and a diamond adjusting block 506 connected with the other end of the screw 505 and used for adjusting the section size of the middle-section throat.
By adopting the washer designed as above, the mixed washing and humidifying effect can be ensured by adjusting the gas-liquid load and the flow rate, thereby ensuring the washing effect to the maximum extent.
The working principle of the utility model is as follows:
after the fan is started, the tail gas generated in the production of the compound fertilizer enters the two-stage cyclone dust collector, most of dust is filtered, then the tail gas enters the Venturi scrubber for pre-washing, and then the tail gas is washed by the scrubber for the second time, so that ammonia in the tail gas is fully absorbed, and the temperature and the dust content of the tail gas are also greatly reduced. And the washed tail gas is sent to an electrostatic demister through a fan to further remove fine mist and aerosol carried in the tail gas, so that the tail gas reaches the emission standard, and finally the tail gas is discharged through a chimney.
In the washing process of the washer, tail gas enters an upper section contraction pipe of a Venturi tube, the flow velocity is gradually increased along the pipe, meanwhile, washing liquid is sprayed into the Venturi tube through a first spray nozzle and a plurality of second spray nozzles and is atomized by being impacted by high-speed airflow, water-air mixing is promoted, the temperature of the tail gas is further reduced, dust particles in the gas are fully contacted and infiltrated at a middle section throat, then, the mixed gas and liquid enter an expansion pipe through the middle section throat, the flow velocity is gradually reduced, the liquid content is increased, the humidifying effect is achieved, the dust particles are mutually bonded, and finally the dust particles enter a gas-liquid separation tower to be removed, so that the purposes of dust removal and ammonia absorption are achieved.
In the process, in order to fully absorb ammonia in the tail gas, a proper amount of phosphoric acid can be supplemented into the washing liquid containing tank at regular time so as to ensure that the pH value of the washing liquid is kept in a proper range.
In addition, when the air inflow of the washer is changed, the screw rod can make up-and-down spiral motion by operating the adjusting wheel to drive the diamond adjusting block to move up and down, the sectional area of the middle-section throat pipe is changed by utilizing the shape characteristics of the diamond adjusting block, and the spraying flow is adjusted by utilizing the circulating pump, so that the requirement of adjusting the gas-liquid load is met, the flow speed at the middle-section throat pipe is kept stable, and the humidifying effect is ensured.
The utility model discloses a reasonable design has effectively solved the processing problem of dust, floating dust and ammonia in the tail gas, makes the emission of tail gas accord with emission standard well.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.
Claims (6)
1. A compound fertilizer production tail gas treatment device is characterized by comprising a two-stage cyclone dust collector (1) for filtering most dust of compound fertilizer tail gas, a Venturi scrubber (2) for realizing tail gas prewashing, a first washing liquid circulating device, a washing device, a second washing liquid circulating device (7), a fan (8) and an electrostatic demister (9); the two-stage cyclone dust collector (1), the Venturi scrubber (2), the washing device, the fan (8) and the electrostatic demister (9) are connected in sequence; the first washing liquid circulating device is connected with the Venturi scrubber (2) and is used for recovering the washing liquid and circulating the washing liquid into the Venturi scrubber again; the washing device comprises a scrubber (5) connected with the Venturi scrubber (2) and used for secondary washing of tail gas, and a gas-liquid separation tower (6) connected with the scrubber (5) and a fan (8) simultaneously; the second washing liquid circulating device (7) is connected with the washer (5) and is used for recovering the washing liquid and recycling the washing liquid to the washer again.
2. A compound fertilizer production tail gas processing apparatus according to claim 1, characterized in that, first washing liquid circulating device includes that the washing liquid that passes through pipeline and venturi scrubber (2) liquid outlet intercommunication holds pond (3) to and pump inlet holds pond (3) intercommunication, pump outlet and venturi scrubber (2) spray piping connected's circulating pump (4) with the washing liquid.
3. A compound fertilizer production tail gas treatment device according to claim 2, characterized in that the structure of the second washing liquid circulating device (7) is the same as that of the first washing liquid circulating device.
4. A compound fertilizer production tail gas treatment device according to claim 3, characterized in that the scrubber (5) is a venturi scrubber.
5. A compound fertilizer production tail gas treatment device according to claim 3, wherein the scrubber (5) comprises a venturi tube (501), a spraying mechanism and a middle-section throat section adjusting mechanism; the Venturi tube (501) comprises an upper section shrinkage tube (5011), a middle section throat tube (5012) and a lower section flared tube (5013) which are sequentially fixed into an integral structure; the upper-section shrinkage pipe (5011) is communicated with an air outlet of the cyclone dust collector (1); the spraying mechanism comprises a first sprayer (502) extending into the upper section of the shrinkage pipe and second sprayers (503) arranged on the pipe wall of the upper section of the shrinkage pipe (5011) and uniformly arranged around the pipe wall; the pump outlet of a circulating pump in the second washing liquid circulating device (7) is simultaneously communicated with the first spray nozzles (502) and all the second spray nozzles through pipelines; the flared pipe (5013) is respectively provided with an exhaust port and a liquid outlet, wherein the exhaust port is communicated with the gas-liquid separation tower (6), and the liquid outlet is communicated with a washing liquid containing pool in the second washing liquid circulating device (7); the middle-section throat pipe section adjusting mechanism extends into the Venturi tube (501) from outside and is used for adjusting the size of the middle-section throat pipe section to realize gas-liquid load adjustment and keeping the flow velocity of the middle-section throat pipe stable.
6. A compound fertilizer production tail gas processing apparatus according to claim 5, characterized in that the middle section throat section adjusting mechanism comprises a screw rod (505) with one end connected with an adjusting wheel (504) and the other end extending into the lower section flared tube (5013) and being in threaded connection with the lower section flared tube, and a diamond-shaped body adjusting block (506) connected with the other end of the screw rod (505) and used for adjusting the section size of the middle section throat tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921406030.7U CN210751966U (en) | 2019-08-27 | 2019-08-27 | Compound fertilizer production tail gas processing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921406030.7U CN210751966U (en) | 2019-08-27 | 2019-08-27 | Compound fertilizer production tail gas processing apparatus |
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| CN210751966U true CN210751966U (en) | 2020-06-16 |
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| CN201921406030.7U Active CN210751966U (en) | 2019-08-27 | 2019-08-27 | Compound fertilizer production tail gas processing apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534423A (en) * | 2020-11-26 | 2022-05-27 | 河南晋开化工投资控股集团有限责任公司 | Compound fertilizer tail gas washing system and circulation process |
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2019
- 2019-08-27 CN CN201921406030.7U patent/CN210751966U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534423A (en) * | 2020-11-26 | 2022-05-27 | 河南晋开化工投资控股集团有限责任公司 | Compound fertilizer tail gas washing system and circulation process |
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