CN111282386A - Dedusting and comprehensive utilization system special for organic fertilizer production line - Google Patents
Dedusting and comprehensive utilization system special for organic fertilizer production line Download PDFInfo
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- CN111282386A CN111282386A CN202010223626.4A CN202010223626A CN111282386A CN 111282386 A CN111282386 A CN 111282386A CN 202010223626 A CN202010223626 A CN 202010223626A CN 111282386 A CN111282386 A CN 111282386A
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- dust collector
- pipe
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- bag
- organic fertilizer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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Abstract
The invention relates to a special dust removal and comprehensive utilization system for an organic fertilizer production line, which comprises a primary cyclone dust collector, a secondary cyclone dust collector and a bag-type dust collector. The outer side of the cylinder section of the secondary cyclone dust collector is provided with an annular water cavity, the inner wall of the secondary cyclone dust collector is provided with a spiral water vapor guide plate with an interlayer water channel, the upper port of the interlayer water channel of the spiral water vapor guide plate is connected with a cold water inlet pipe, and a water outlet pipe of the guide plate is used for connecting a steam boiler; and a heating steam coil is fixedly arranged on the outer side surfaces of the ash bucket and the box body of the bag-type dust collector and used for transferring heat to the interior of the bag-type dust collector. Aiming at high-humidity high-viscosity dust-containing organic fertilizer dust, technical measures such as reducing the moisture content and improving the temperature of dust gas are adopted, so that the dust is prevented from being condensed and pasted to the greatest extent, and the long-term reliable and stable operation of a bag-type dust remover under the actual working condition is ensured; in addition, the invention obtains low-concentration clean organic fertilizer liquid from the organic fertilizer dust treatment link, thereby realizing comprehensive utilization of dust.
Description
Technical Field
The invention relates to a dust removal and comprehensive utilization system applied to an organic fertilizer production line.
Background
The filter bag of the bag-type dust collector can prevent fine dust from passing through, the holes interwoven by the warp and weft threads of the fabric are small, and the warp and weft threads are fine, so that the effective area of the screen is increased, and the wind resistance is reduced; in addition, the filter bag fabric has long fluff and high elasticity, so that the filter bag fabric can cover the holes and has certain strength; meanwhile, the fluff of the fabric is positioned on the surface contacted with the dust-containing air, so that the fabric is convenient to clean by using reverse airflow, and a tail gas treatment system for producing and discharging organic fertilizers generally adopts a bag-type dust remover. The dust removal efficiency of the bag-type dust remover can reach about 99 percent.
Because the moisture content of the tail gas of the dryer in the production of the organic fertilizer is high, the dust concentration is high, the organic fertilizer dust is easy to absorb moisture, the moisture content is high, the viscosity is high, the filter bag of the bag-type dust collector is easy to cause firm plugging when passing through the filter bag, and the filter bag is very difficult to clean.
At present, the mainstream method for solving the problems in organic fertilizer production enterprises is that large-particle dust is removed by a cyclone dust collector, and then bag-type dust collection is carried out to reduce the pressure for cleaning a filter bag, but the problems of dust condensation and bag pasting and filter bag mesh blockage caused by high dust humidity and high viscosity are still difficult to solve, and the application of a bag-type dust collector in the field of organic fertilizer production is restricted.
Disclosure of Invention
The invention aims to solve the technical problems that firstly, aiming at high-humidity high-viscosity dust-containing organic fertilizer dust, technical measures such as reducing the moisture content and improving the temperature of dust gas are adopted, and the dust is prevented from being condensed and pasted as much as possible so as to ensure the long-term reliable and stable operation of a bag-type dust remover under the actual working condition; and secondly, obtaining low-concentration clean organic fertilizer liquid from the organic fertilizer dust treatment link, and realizing comprehensive utilization of dust.
The technical scheme of the invention is as follows:
a dust removal and comprehensive utilization system special for an organic fertilizer production line is characterized by comprising a primary cyclone dust collector and a secondary cyclone dust collector which are connected with each other, wherein one side of the lower end part of a cylindrical section of the secondary cyclone dust collector is connected with the upper end part of the primary cyclone dust collector through a first transition pipe; the upper port of the secondary cyclone dust collector is connected with the dust inlet end of the bag-type dust collector through a second transition pipe, and the lower end of the conical section of the secondary cyclone dust collector is connected with a liquid discharge pipe; an outer cylinder is arranged on the outer side of the cylindrical section of the secondary cyclone dust collector, an annular water cavity is formed between the outer cylinder and the cylindrical section of the secondary cyclone dust collector, and the upper end and the lower end of the annular water cavity are both closed; a spiral water vapor guide plate with an interlayer water channel is fixedly arranged on the inner wall of the cylindrical section of the secondary cyclone dust collector, the upper port of the interlayer water channel of the spiral water vapor guide plate is connected with a cold water inlet pipe, and the lower port of the interlayer water channel is communicated with the annular water cavity; the annular water cavity is also connected with an annular water cavity water outlet pipe, and the annular water cavity water outlet pipe is used for connecting a steam boiler water storage pool or a steam boiler water feeding pipe; a heating steam coil is fixedly arranged on the outer side surfaces of the ash bucket and the box body of the bag-type dust collector and is used for transferring heat to the interior of the bag-type dust collector; the steam inlet end of the heating steam coil (14) is connected with the steam boiler through a steam pipe, and the steam outlet end is connected with a steam return pipe.
Furthermore, the system also comprises a hot air compensation subsystem which comprises a hot air pipe with an electromagnetic valve and a temperature sensor, wherein the hot air pipe is connected with a high-temperature gas pipe of the hot air furnace and a second transition pipe for supplementing high-temperature air into the bag-type dust remover so as to improve the temperature of the dust gas; the temperature sensor is arranged at a dust gas inlet of the bag-type dust remover and is used for collecting the temperature of the dust gas.
Further, the end part of the first transition pipe connected with the primary cyclone dust collector extends into the primary cyclone dust collector and is lower than the inlet end of the dust inlet pipe.
Furthermore, the water outlet pipe of the annular water cavity is arranged on the outer barrel and is positioned on the opposite side of the cold water inlet pipe. The invention has the positive effects that:
firstly, the invention adopts the bag-type dust remover for treatment, the dust removal efficiency reaches up to 99 percent, and the emission concentration completely reaches or exceeds the national standard. The dust obtained from the primary cyclone dust collector and the bag-type dust collector can be immediately recycled, and the component difference does not exist, and the part of dust is directly conveyed to a material returning belt through a belt conveyor for secondary granulation; the low-concentration clean organic fertilizer liquid obtained from the secondary cyclone dust collector can be used for water quantity adjustment in the organic fertilizer fermentation link and water supplement in related links before finished product packaging, or used as a high-quality raw material for producing flush fertilizer, so that the cost for manually cleaning dust in a dust removal chamber is greatly saved, and the economic benefit is further increased.
The relevant standards have strict requirements on the moisture content of the organic fertilizer sold in the market, if the moisture content of the organic fertilizer product is too high, the organic fertilizer product belongs to an unqualified product, and if the moisture content is too low, the dry matter content can be increased, so that the production cost is increased, the product income of the commercial organic fertilizer is directly reduced, the air permeability of the organic fertilizer can be influenced, the anaerobic state is caused, and the activity of specific microorganisms is inhibited. Particularly, in the processes of quality inspection and stockpiling before fermentation is finished and sealed packaging, the organic fertilizer still has a continuous dehydration phenomenon, so a process link of water measurement and water supplement is generally required to be established before packaging. Because of higher purity, the low-concentration clean organic fertilizer liquid obtained from the secondary cyclone dust collector becomes a better choice for supplementing water in the link.
Secondly, the two-stage cyclone dust collector is adopted in front of the bag-type dust collector for treatment, open fire can be effectively prevented from entering the bag-type dust collector, the flame-retardant function is realized, and the whole system is protected.
Thirdly, the heat exchange mechanism of the secondary cyclone dust collector has the outstanding characteristics of compact structure and high heat exchange efficiency. Cold water is downward and upward at first, flows through spiral steam guide plate intermediate layer water course and the annular water cavity of establishing ties each other in proper order, has longer flow in less cubical space, and dust gas can carry out abundant heat exchange with cold water through the runner in-process that spiral steam guide plate outer wall and second grade cyclone cylinder section inner wall enclose.
The invention adds a mixing valve on the flue gas pipeline before the cyclone enters the bag-type dust collector, the mixing valve is connected on the high-temperature gas main pipe of the hot blast stove and used for starting hot air compensation when the temperature of the flue gas is lower than the specified temperature and heating the flue gas, so that the temperature in the bag-type dust collector is always kept at the steam flash point, the steam in the system is ensured not to be condensed and is always in a steam state.
In conclusion, the invention adopts various measures to avoid the condensation of dust gas in the bag-type dust remover, thereby better ensuring the long-term reliable and stable operation of the bag-type dust remover under the actual working condition; and low-concentration clean organic fertilizer liquid is obtained from the organic fertilizer dust treatment link, so that comprehensive utilization of dust is realized.
Drawings
FIG. 1 is a schematic diagram of the overall architecture and flow of the system of the present invention.
FIG. 2 is a schematic view of the structure of the upper part (cylindrical section) of the secondary cyclone of the present invention.
Detailed Description
Referring to fig. 1, the embodiment of the present invention includes a primary cyclone 1 and a secondary cyclone 5, and a dust inlet pipe 2 is installed at one side of the upper end of the primary cyclone 1. One side of the lower end part of the cylindrical section of the secondary cyclone dust collector 5 is connected with the upper end part of the primary cyclone dust collector 1 through a first transition pipe 3, and the end part of the first transition pipe 3 connected with the primary cyclone dust collector 1 extends into the primary cyclone dust collector 1 and is lower than the height of the inlet end of the dust inlet pipe 2.
Organic fertilizer drying dust firstly enters a primary cyclone dust collector 1 through a dust inlet pipe 2 to carry out primary dust collection, large-particle dust falls into the conical part of the primary cyclone dust collector under the action of centrifugal force and is discharged out of a system, and the primary cyclone dust collector can remove about 60-70% of dust.
The upper port of the secondary cyclone dust collector 5 is connected with the dust inlet end of the bag dust collector 13 through a second transition pipe 11, and the lower end of the conical section of the secondary cyclone dust collector 5 is connected with a liquid discharge pipe 4.
Referring to fig. 2, an outer cylinder 7 is arranged on the outer side of the cylindrical section of the secondary cyclone dust collector 5, an annular water cavity 8 is formed between the outer cylinder 7 and the cylindrical section of the secondary cyclone dust collector 5, and the upper end and the lower end of the annular water cavity 8 are both closed. A spiral water vapor guide plate 18 with an interlayer water channel is fixedly arranged on the inner wall of the cylindrical section of the cyclone dust collector 5, the upper port of the interlayer water channel of the spiral water vapor guide plate 18 is connected with a cold water inlet pipe 9, and the cold water inlet pipe 9 penetrates out of the annular water cavity 8 to be connected with a tap water pipe. The lower port of the interlayer water channel is communicated with the annular water cavity 8. The annular water cavity 8 is also connected with an annular water cavity water outlet pipe 6, and the annular water cavity water outlet pipe 6 is arranged on the outer barrel 7 and is positioned on the opposite side of the cold water inlet pipe 9. The water outlet pipe 6 of the annular water cavity is used for connecting a water storage tank of a steam boiler or a water feeding pipe of the steam boiler.
Running water flows through the interlayer water channel of the spiral water vapor guide plate 18 from top to bottom through the cold water inlet pipe 9, then flows upwards through the annular water cavity 8, finally flows out through the water outlet pipe 6 of the annular water cavity, and enters the steam boiler after being purified. Usually, the water enters the water storage tank firstly and is collected into a water feeding pipe of a steam boiler after being purified.
The dust from the primary cyclone dust collector 1 is subjected to heat exchange with water in the secondary cyclone dust collector 5 for cooling, and part of condensed water vapor and carried dust flows downwards along the spiral water vapor guide plate 18 and is discharged through the liquid discharge pipe 4, so that pure low-concentration organic fertilizer liquid is obtained for comprehensive utilization. The dust gas after the secondary dust removal and dehydration enters a bag-type dust remover 13 through a second transition pipe 11 for fine filtration.
In order to ensure that the dust gas flowing through the bag-type dust collector 13 has a high temperature and to avoid condensation of the dust gas as much as possible, a heating steam coil 14 is fixedly installed on the outer side surfaces of the dust hopper and the box body of the bag-type dust collector 13 and used for transferring heat to the interior of the bag-type dust collector. The steam inlet end of the heating steam coil pipe 14 is connected with the steam boiler through a steam pipe, the steam outlet end is connected with a steam return pipe, and the discharged steam returns to the steam boiler for circular heating or is used as low-temperature steam for other places in a workshop.
In order to further ensure that the dust gas has a higher temperature when entering the bag-type dust collector, the embodiment of the invention further comprises a hot air compensation subsystem, which comprises a hot air pipe 10 with an electromagnetic valve as an air mixing valve and a temperature sensor 12, wherein the hot air pipe 10 is connected with a high-temperature gas pipe of a hot air furnace and is connected with a second transition pipe 11 for supplying high-temperature air into the bag-type dust collector 13 to increase the temperature of the dust gas, and the temperature sensor 12 is installed at a dust gas inlet of the bag-type dust collector 13 for collecting the temperature of the dust gas, and usually, if the temperature collected by the temperature sensor 12 is lower than 90 ℃, a controller controls the electromagnetic valve to open the hot air supply, and closes the electromagnetic valve when the temperature is lower than.
An air outlet pipe 15 of the bag-type dust collector 13 is connected with an exhaust chimney 17 through a dust removal fan 16, and the treated clean tail gas is discharged out of the system from the exhaust chimney 17.
The bag-type dust collector adopts an off-line dust cleaning design. The bag-type dust remover is divided into a plurality of independent chambers, a pneumatic off-line valve is arranged at the air outlet of each unit chamber, and the off-line valve of the current chamber is closed through PLC automatic control when dust is to be removed, so that the whole dust removing process is not interfered by updraft, dust falling is accelerated, secondary adsorption of dust is reduced, and dust removal of the dust remover is more thorough. During operation, dusty gas enters each unit filter bag chamber from the dust collector gas inlet main pipe, due to the effect of the actual expansion of the gas flow section or the guide plate, a part of large-particle dust in the gas flow falls into the dust hopper due to inertia, the small-particle dust is blocked outside the filter bag through the effects of screening, inertia, adhesion, diffusion, static electricity and the like, and the purified gas enters the bag, is collected into the gas purifying chamber and is discharged through the exhaust pipe. Along with the continuous filtration, dust particles gradually form a dust layer on the surface of the filter bag due to the functions of adhesion, interception and the like. When the pressure difference of the filter bag chamber reaches a set value or runs to a set time, the controller sends out a signal, and the lift valve closes the exhaust port of the unit filter bag chamber to enable the chamber to be in an off-line state. At the moment, compressed air is injected into the filter bags in the unit filter bag chambers from the upper nozzles of the injection pipes through the pulse valves by the air bags, and grouped injection is carried out. After the blowing is finished, the lift valve is opened, the filter bag is recovered to the filtering state, and similarly, the other unit filter bag chambers are controlled by the program controller to carry out the blowing circulation in sequence so as to realize the purpose of cleaning ash. Finally, the dust dropped from the dust hopper under the action of the expansion of the filter bag and the reverse acceleration is conveyed away by the dust conveying device.
The invention uses an advanced electromagnetic pneumatic ash falling device, the electromagnetic pneumatic knocking hammers are arranged on the main pipeline at intervals of 5-6 meters, the knocking hammers are sequentially started from far to near during working through a special control system, the accumulated ash adhered on the pipeline is shaken off, and the shaken off dust can be pumped away under the action of high negative pressure and high wind speed (the wind speed of the pipeline is 18-20 meters per second), so that the problems of wall adhesion, material hanging, blockage and the like in the production process of powder materials can be effectively solved, and the damage and the deformation to a storage bin can be avoided. The problem of dust adhesion on the wall of the ash hopper can also be solved together by the electromagnetic pneumatic powder falling device.
The bag-type dust collector with the structure is specially designed for producing organic fertilizers, and has the characteristics of good effect, reliable operation, automatic PLC program control, simplicity in operation, labor cost saving, low operation cost and the like in the production process of the organic fertilizers.
Claims (4)
1. A dust removal and comprehensive utilization system special for an organic fertilizer production line is characterized by comprising a primary cyclone dust collector (1) and a secondary cyclone dust collector (5) which are connected with each other, wherein one side of the lower end part of a cylindrical section of the secondary cyclone dust collector (5) is connected with the upper end part of the primary cyclone dust collector (1) through a first transition pipe (3); the upper port of the secondary cyclone dust collector (5) is connected with the dust inlet end of the bag dust collector (13) through a second transition pipe (11), and the lower end of the conical section of the secondary cyclone dust collector (5) is connected with a liquid discharge pipe (4); an outer cylinder (7) is arranged on the outer side of the cylindrical section of the secondary cyclone dust collector (5), an annular water cavity (8) is formed between the outer cylinder (7) and the cylindrical section of the secondary cyclone dust collector (5), and the upper end and the lower end of the annular water cavity (8) are sealed; a spiral water vapor guide plate (18) with an interlayer water channel is fixedly arranged on the inner wall of the cylindrical section of the secondary cyclone dust collector (5), the upper port of the interlayer water channel of the spiral water vapor guide plate (18) is connected with a cold water inlet pipe (9), and the lower port of the interlayer water channel is communicated with the annular water cavity (8); the annular water cavity (8) is also connected with an annular water cavity water outlet pipe (6), and the annular water cavity water outlet pipe (6) is used for connecting a steam boiler water storage pool or a steam boiler water feeding pipe; a heating steam coil (14) is fixedly arranged on the outer side surfaces of the ash bucket and the box body of the bag-type dust collector (13) and is used for transferring heat to the interior of the bag-type dust collector; the steam inlet end of the heating steam coil (14) is connected with the steam boiler through a steam pipe, and the steam outlet end is connected with a steam return pipe.
2. The special dedusting and comprehensive utilization system for the organic fertilizer production line as recited in claim 1, characterized in that: the system also comprises a hot air compensation subsystem, wherein the subsystem comprises a hot air pipe (10) with an electromagnetic valve and a temperature sensor (12), wherein the hot air pipe (10) is connected with a high-temperature gas pipe of the hot air furnace and a second transition pipe (11) and is used for supplementing high-temperature air into the bag-type dust remover (13) to improve the temperature of dust gas; the temperature sensor (12) is arranged at a dust gas inlet of the bag-type dust collector (13) and is used for collecting the temperature of the dust gas.
3. The special dedusting and comprehensive utilization system for the organic fertilizer production line as recited in claim 1 or 2, characterized in that: the end part of the first transition pipe (3) connected with the primary cyclone dust collector (1) extends into the primary cyclone dust collector (1) and is lower than the inlet end of the dust inlet pipe (2).
4. The special dedusting and comprehensive utilization system for the organic fertilizer production line as recited in claim 1 or 2, characterized in that: the water outlet pipe (6) of the annular water cavity is arranged on the outer cylinder (7) and is positioned at the opposite side of the cold water inlet pipe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223626.4A CN111282386A (en) | 2020-03-26 | 2020-03-26 | Dedusting and comprehensive utilization system special for organic fertilizer production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223626.4A CN111282386A (en) | 2020-03-26 | 2020-03-26 | Dedusting and comprehensive utilization system special for organic fertilizer production line |
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| Publication Number | Publication Date |
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| CN111282386A true CN111282386A (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010223626.4A Pending CN111282386A (en) | 2020-03-26 | 2020-03-26 | Dedusting and comprehensive utilization system special for organic fertilizer production line |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203639423U (en) * | 2013-12-18 | 2014-06-11 | 袁学发 | Biomass gasification furnace |
| CN204656268U (en) * | 2015-05-27 | 2015-09-23 | 洛阳市通用环保设备工程有限公司 | Boiler tail complex dust collector |
| CN107376523A (en) * | 2017-09-05 | 2017-11-24 | 邢强 | Heat recovery cyclone dust collectors |
| CN207562532U (en) * | 2017-09-05 | 2018-07-03 | 上海超惠通风环保设备有限公司 | A kind of bag filter in multimedium high concentration sub-micron exhaust treatment system |
| CN208049657U (en) * | 2018-03-07 | 2018-11-06 | 青岛美卡新型材料有限公司 | A kind of dust suction tails dedusting recovery system |
| CN208553578U (en) * | 2018-06-13 | 2019-03-01 | 肇庆乐华陶瓷洁具有限公司 | A kind of spray tower bag-type dust removal system |
-
2020
- 2020-03-26 CN CN202010223626.4A patent/CN111282386A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203639423U (en) * | 2013-12-18 | 2014-06-11 | 袁学发 | Biomass gasification furnace |
| CN204656268U (en) * | 2015-05-27 | 2015-09-23 | 洛阳市通用环保设备工程有限公司 | Boiler tail complex dust collector |
| CN107376523A (en) * | 2017-09-05 | 2017-11-24 | 邢强 | Heat recovery cyclone dust collectors |
| CN207562532U (en) * | 2017-09-05 | 2018-07-03 | 上海超惠通风环保设备有限公司 | A kind of bag filter in multimedium high concentration sub-micron exhaust treatment system |
| CN208049657U (en) * | 2018-03-07 | 2018-11-06 | 青岛美卡新型材料有限公司 | A kind of dust suction tails dedusting recovery system |
| CN208553578U (en) * | 2018-06-13 | 2019-03-01 | 肇庆乐华陶瓷洁具有限公司 | A kind of spray tower bag-type dust removal system |
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