CN213645343U - Flue gas heat source garbage fermentation heating system - Google Patents
Flue gas heat source garbage fermentation heating system Download PDFInfo
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- CN213645343U CN213645343U CN202021993395.7U CN202021993395U CN213645343U CN 213645343 U CN213645343 U CN 213645343U CN 202021993395 U CN202021993395 U CN 202021993395U CN 213645343 U CN213645343 U CN 213645343U
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- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 78
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000003546 flue gas Substances 0.000 title claims abstract description 72
- 238000000855 fermentation Methods 0.000 title claims abstract description 36
- 230000004151 fermentation Effects 0.000 title claims abstract description 36
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 238000000746 purification Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 8
- 239000000779 smoke Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 7
- 239000011229 interlayer Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 13
- 238000004056 waste incineration Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a flue gas heat source rubbish fermentation heating system, the system is from flue gas purification system afterbody flue access, wherein include the forced draught blower of being connected with flue gas purification system afterbody flue, and the forced draught blower rear end sets up first total manual valve in the way, first total way motorised valve and first total way flowmeter respectively in flue gas entry total way, the flue gas divide into 4 branch roads after the first total way flowmeter, and four lateral walls in rubbish storehouse are connected respectively to 4 branch roads, all is provided with the heat exchanger in the intermediate layer of every lateral wall, and 4 branch roads collect to the exhanst gas outlet total way, set gradually the manual valve in the total way of second, the total way motorised valve of second and the total way flowmeter of second on the exhanst gas outlet total way, finally introduce the chimney with the flue gas by the draught fan. The tail flue gas of the system flue gas purification system after utilizing the waste incineration heats the garbage bin as the heat source, improves the fermentation effect of rubbish to improve the calorific value of the rubbish of going into the stove, promote the generated energy.
Description
Technical Field
The utility model belongs to the technical field of refuse treatment, in particular to flue gas heat source rubbish fermentation heating system.
Background
With the development of the economic level of China and the acceleration of the urbanization process, the problem of 'refuse surrounding cities' around the country is increasingly highlighted, and the situation of large and medium-sized cities is particularly severe. In order to improve the urban environment quality and meet the requirements of people on living quality and living environment, the waste incineration power generation becomes a mainstream solid waste treatment mode widely popularized in large and medium-sized domestic cities.
The waste incineration treatment cost is relatively low, the method is suitable for the characteristics of low heat value, poor classification degree and high moisture content of domestic household garbage, and has the characteristics of harmlessness, recycling and reduction. After the domestic garbage is collected and transported to a garbage incineration treatment plant, the domestic garbage is stacked in a garbage bin and stored for 5 to 7 days, and the domestic garbage is fully fermented under the action of microorganisms. After fermentation, a large amount of water in the garbage can be separated out and converted into leachate. The heat value of the garbage after liquid is discharged is increased, and more heat is released after the garbage of unit weight is combusted, so that higher generating capacity is realized.
However, in northern areas of China, the temperature is low in winter, and the room temperature in the garbage bin cannot reach the optimal temperature required by microbial fermentation under natural conditions, so that the fermentation effect is poor, and garbage is difficult to burn. Particularly in the northeast cold region, the situation is serious, and the temperature of the garbage entering the garbage bin in winter is often raised by hot air or other measures, so that the combustion condition in the incinerator can be guaranteed, and the phenomena of insufficient combustion and raw material discharge are avoided.
At present, two methods are commonly used for enhancing the garbage fermentation effect in a garbage incineration plant: one is a hot air heating process, and usually, steam generated by a waste heat boiler is used as a heat source, and a large amount of hot air is fed into a garbage bin by a fan. The convection heat exchange mode has good effect on the garbage stacked on the surface layer, but cannot fully heat the deep garbage, and has low overall heat exchange efficiency, high energy consumption and poor economic benefit. In addition, the hot air sent into the garbage bin can also cause the air pressure in the bin to rise, and partial odor is escaped. The other is to carry out wet decomposition treatment on the garbage, and carry out high-temperature and high-pressure fermentation on the garbage before entering a furnace by utilizing steam and a pressure container tank body. The wet decomposition treatment not only has large steam consumption and frequent material pouring operation, but also can convert steam after heat exchange into a large amount of percolate, thereby causing larger load impact on a percolate treatment system and increasing the sewage treatment cost.
On the other hand, tail flue gas which is purified and discharged after the waste is incinerated and reaches the standard has the temperature of about 130 ℃, is a continuous and stable heat source, is directly discharged to the atmospheric environment through a factory chimney, and waste heat is not effectively utilized, but causes thermal pollution.
Therefore, how to reasonably utilize the flue gas generated after the incineration and purification of the garbage and improve the fermentation effect of the garbage is a problem to be solved urgently at present.
Disclosure of Invention
Problem to prior art existence, the utility model aims at providing a flue gas heat source waste fermentation heating system utilizes waste incineration back gas cleaning system's afterbody flue gas as the heat source, heats the garbage bin, improves the fermentation effect of rubbish to improve the calorific value of income stove rubbish, promote the generated energy.
The utility model aims at realizing through the following technical scheme:
the utility model provides a flue gas heat source rubbish fermentation heating system, the system is from flue gas purification system afterbody flue access, include the forced draught blower of being connected with flue gas purification system afterbody flue, the forced draught blower rear end sets up first manual valve of way, first way of totaling motorised valve and first way flowmeter always on the way of flue gas entry, flue gas divide into 4 branch roads after the first way flowmeter, and four lateral walls in garbage bin are connected respectively to 4 branch roads, all are provided with the heat exchanger in the interlayer of every lateral wall, and 4 branch roads collect to the exhanst gas outlet way always, set gradually on the exhanst gas outlet way manually operated valve of second way, second way motorised valve and second way flowmeter always, finally introduce the chimney with the flue gas by the draught fan.
Furthermore, a first branch manual valve and a first branch flowmeter are arranged in front of each smoke inlet of the 4 branches.
Furthermore, a second branch manual valve and a second branch flowmeter are respectively arranged between the rear end of each smoke outlet of the 4 branches and the front end of the smoke outlet main path.
Further, the heat exchanger is a coiled pipe heat exchanger, and the coil is rolled to cover the whole side wall.
Further, four side walls of the garbage bin comprise a front wall, a right wall, a rear wall and a left wall.
Further, the distance between the heat exchanger and the inner surface of the side wall of the garbage bin is 15cm-25 cm.
Furthermore, the heat exchanger is made of 15CrMoG materials, and an anti-corrosion coating is coated on the outer side of the pipe wall.
Furthermore, the air feeder and the induced draft fan both adopt multistage centrifugal fans and are matched with variable frequency motors.
Furthermore, the first main flow meter and the second main flow meter both adopt electromagnetic flow meters.
The utility model discloses compare prior art's beneficial effect does:
1. the flue gas heat source garbage fermentation heating system carries out waste heat recovery and utilization on flue gas discharged by garbage incineration, heats garbage stored in a garbage bin wall and a garbage bin by using the flue gas heat source as a heat source, does not consume steam, does not need steam heating or electric heating, has low operation cost, reduces heat pollution, and simultaneously improves the integral temperature in the garbage bin, so that the garbage fermentation is more sufficient, the heat value of garbage entering the furnace is further improved, and the generated energy is favorably improved;
2. the flue gas heat source garbage fermentation heating system effectively improves the garbage fermentation effect, solves the problems of long garbage fermentation period, poor effect and escape of odor in the bin in winter, and has particularly obvious effect on household garbage incineration projects in cold areas in the north of China;
3. the utility model discloses a flue gas heat source rubbish fermentation heating system adopts the mode of radiation heat transfer, compares in traditional heat convection mode, and the heat transfer duration is of a specified duration, the temperature promotes gently, more is favorable to the fermentation effect of microorganism, makes the fermentation effect more abundant, and each heat exchanger adopts the form of connecting in parallel, independently carries out the heat transfer, after certain branch road or certain heat exchanger broke down and lead to certain face lateral wall heat transfer to become invalid, can stack rubbish in the position that is close to all the other lateral walls, and the system still can continuously operate, heats rubbish;
4. the flue gas heat source garbage fermentation heating system effectively increases the environmental temperature in the garbage bin, the air in the bin is used as the air source of the primary air of the incinerator, the combustion working condition in the incinerator is effectively improved by increasing the temperature, the steam consumption required by the primary air heating is reduced, the operation cost is saved, and the economic benefit of the whole plant is increased;
5. compared with a hot air heating process and a wet decomposition treatment process, the flue gas heat source garbage fermentation heating system of the utility model can not cause the increase of the air pressure of the garbage bin and the escape of odor, and can not generate extra leachate and increase the sewage treatment cost after heating garbage; the system effectively utilizes the waste heat of the flue gas, reduces the heat pollution of the flue gas emission, but does not produce extra pollutants or byproducts, and is more energy-saving and environment-friendly compared with other treatment processes for improving the garbage fermentation effect.
Drawings
Fig. 1 is a schematic structural diagram of a waste fermentation heating system using a flue gas heat source according to an embodiment of the present invention, wherein an arrow in the schematic structural diagram indicates a flow direction of flue gas.
Detailed Description
Examples
As shown in fig. 1, the present embodiment provides a waste fermentation heating system using a flue gas heat source, the system is accessed from a tail flue of a flue gas purification system, and includes a blower 1 connected to the tail flue of the flue gas purification system, a first main manual valve 2, a first main electric valve 3 and a first main flow meter 4 are respectively arranged on a flue gas inlet main road at the rear end of the blower, the flue gas after the first main flow meter is divided into 4 branches, a first branch manual valve 5 and a first branch flow meter 6 are respectively arranged in front 701 of each flue gas inlet of the 4 branches, the 4 branches are respectively connected to four side walls of a waste bin 7, namely a front wall 703, a right wall 704, a rear wall 705 and a left wall 706, a serpentine heat exchanger 707 is arranged in an interlayer of each side wall, a heat exchanger coil covers the whole side wall, only the serpentine heat exchanger arranged in the interlayer of the front wall is shown in fig. 1, the rest three sides are omitted and not drawn; and a second branch manual valve 8 and a second branch flowmeter 9 are respectively arranged at the rear end of each flue gas outlet 702 of the 4 branches before the flue gas outlet main path, then the 4 branches are converged to the flue gas outlet main path, a second main path manual valve 10, a second main path electric valve 11 and a second main path flowmeter 12 are sequentially arranged on the flue gas outlet main path, and finally, the flue gas is introduced into a chimney 14 by an induced draft fan 13.
In the system, the air feeder 1 and the induced draft fan 13 both adopt multistage centrifugal fans and are matched with variable frequency motors; because the flowing flue gas contains a small amount of corrosive gases (HCL, SOX, NOX and the like), the matched connecting pipelines of the system are all made of stainless steel, the valve bodies of the manual valve and the electric valve are made of alloy steel, and the contact surfaces of the pipelines and the valve bodies and the flue gas are treated by anticorrosive coatings; the coiled pipe heat exchanger 707 is arranged in the interlayer of the side wall, the distance between the heat exchanger and the inner surface of the side wall of the garbage bin is about 20cm, the heat exchanger is made of 15CrMoG materials, the outer side of the pipe wall is coated with an anticorrosive coating, and flue gas is guided by the coiled pipe and flows through the side wall of the garbage bin on the whole surface. The outer walls of the civil engineering materials around the coiled pipe heat exchanger are subjected to three-layer anti-seepage treatment, and the leachate of the garbage bin is prevented from immersing into the wall of the tank by multiple measures and corroding the wall of the heat exchanger. In the system, each flowmeter adopts an electromagnetic flowmeter, and signals are accessed to a DCS of the whole plant; the valve and the pipeline, and the fan and the pipeline are connected by flanges.
The operation control and process flow of the system described in this embodiment are as follows:
a branch is led out from a flue at the tail part of the flue gas purification system and is connected to an inlet of the system. The air feeder 1 sends the purified flue gas into a flue gas inlet main path of the system, the flue gas is divided into four paths after flowing through a first main path manual valve 2 and a first main path electric valve 3 on the main path, and the four paths of flue gas respectively flow through a first branch path manual valve 5 and a first branch path flowmeter 6 on 4 branch paths and flow to the serpentine pipe heat exchangers 707 arranged in the interlayer of the tank walls on the front side, the rear side, the left side and the right side of the garbage bin. Through the effect of heat exchanger, the flue gas fully heats the rubbish that stacks in rubbish storehouse lateral wall and the storehouse. The flue gas after heat exchange is collected to a flue gas outlet main path through 4 branches, sequentially flows through a manual valve on the branch, a manual valve 10 on a second main path and an electric valve 11 on the main path, and is finally discharged to the atmospheric environment through a plant chimney 14 under the traction action of a draught fan 13.
The start, stop and switching operation of the system can be controlled by an air feeder, an induced draft fan, an electric valve and a manual valve which are arranged on a flue gas conveying pipeline. The electric valve is matched with an integrated valve body with an electric actuating mechanism, and the actuating mechanism receives a 4-20 mA signal. The blower, the draught fan and the electric valves arranged on the smoke inlet and outlet main lines can be respectively operated and controlled on the DCS and the site. The air feeder and the induced draft fan are controlled by frequency conversion, are matched with a frequency converter, and are provided with a control box on site.
The flow of the fan, the wind pressure, the current, the main road, the flue gas flow of each branch and other key parameter signals are sent to the DCS, the blower, the draught fan and the electric valve have a fault alarm function, and the operation state of the equipment in the system can be monitored on the DCS. According to the flue gas flow signals measured by the flow meters on the main road and the branch roads and the temperature signals in the garbage bin, real-time feedback is carried out, the power of the air feeder and the air facing machine is adjusted, and the heat exchange quantity of the flue gas is ensured to meet the requirement of the optimal fermentation environment in the garbage bin.
The heat exchangers of the tank walls at the front, the back, the left and the right of the garbage bin can realize independent operation without mutual interference through the opening and the closing of the manual valves of the inlet and the outlet of each branch. The flow measured by the flow meters arranged on each branch and the main road can monitor whether the smoke flow of a certain branch is normal or not. When a certain branch or a certain heat exchanger has a fault, the manual valves at the inlet and the outlet of the branch can be closed, the branch is isolated for maintenance, and the rest branches or the heat exchangers run normally without being influenced.
Claims (9)
1. The utility model provides a flue gas heat source rubbish fermentation heating system, the system inserts from flue gas purification system afterbody flue, a serial communication port, include forced draught blower (1) of being connected with flue gas purification system afterbody flue, the forced draught blower rear end sets up first total manual valve (2), first total way motorised valve (3) and first total way flowmeter (4) respectively on the flue gas entry way, the flue gas divide into 4 branch roads after the first total way flowmeter, and four lateral walls of garbage bin (7) are connected respectively to 4 branch roads, all is provided with heat exchanger (707) in the interlayer of every lateral wall, and 4 branch roads collect to the exhanst gas outlet way, set gradually manual valve (10) of second total way, second total way motorised valve (11) and second total way flowmeter (12) on the exhanst gas outlet way, finally introduce chimney (14) with the flue gas by draught fan (13).
2. The system for heating garbage by fermentation with a smoke heat source according to claim 1, wherein a first branch manual valve (5) and a first branch flowmeter (6) are arranged in front of each smoke inlet (701) of the 4 branches.
3. The system for heating garbage by fermentation of a flue gas heat source according to claim 1, wherein a second branch manual valve (8) and a second branch flowmeter (9) are respectively arranged from the rear end of each flue gas outlet (702) of the 4 branches to the front of a flue gas outlet main path.
4. A flue gas heat source waste fermentation heating system as claimed in claim 1 wherein the heat exchanger (707) is a serpentine heat exchanger with a coil laid over the entire side wall.
5. A flue gas heat source garbage fermentation heating system according to claim 1, characterized in that the four side walls of the garbage bin (7) comprise a front wall (703), a right wall (704), a rear wall (705) and a left wall (706).
6. A flue gas heat source garbage fermentation heating system as claimed in any one of claims 1, 4 or 5, wherein the distance from the heat exchanger (707) to the inner surface of the side wall of the garbage bin is 15cm-25 cm.
7. The system for heating garbage by fermenting and heating through a smoke heat source according to any one of claims 1, 4 or 5, wherein the heat exchanger (707) is made of 15CrMoG, and the outer side of the pipe wall is coated with an anticorrosive coating.
8. The waste fermentation heating system using a flue gas heat source as claimed in claim 1, wherein the air blower (1) and the induced draft fan (13) both use multistage centrifugal fans and are matched with variable frequency motors.
9. The system for heating garbage by fermentation by using a flue gas heat source as claimed in claim 1, wherein the first main flow meter (4) and the second main flow meter (12) both adopt electromagnetic flow meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021993395.7U CN213645343U (en) | 2020-09-14 | 2020-09-14 | Flue gas heat source garbage fermentation heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021993395.7U CN213645343U (en) | 2020-09-14 | 2020-09-14 | Flue gas heat source garbage fermentation heating system |
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| Publication Number | Publication Date |
|---|---|
| CN213645343U true CN213645343U (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021993395.7U Active CN213645343U (en) | 2020-09-14 | 2020-09-14 | Flue gas heat source garbage fermentation heating system |
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| Country | Link |
|---|---|
| CN (1) | CN213645343U (en) |
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2020
- 2020-09-14 CN CN202021993395.7U patent/CN213645343U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xie Jiarui Inventor after: Chai Jianwei Inventor after: Zhang Jiangjun Inventor after: Liu Xiaotong Inventor after: Dong Bo Inventor after: Li Hai Inventor after: Hu Bo Inventor after: Zhou Meng Inventor after: Ma Jinming Inventor before: Xie Jiarui Inventor before: Ma Jinming Inventor before: Zeng Wuqing Inventor before: Chai Jianwei Inventor before: Zhang Jiangjun Inventor before: Liu Xiaotong Inventor before: Dong Bo Inventor before: Li Hai Inventor before: Hu Bo Inventor before: Zhou Meng |
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| CB03 | Change of inventor or designer information |