CN218495746U - Waste heat recovery mesh belt type dryer - Google Patents
Waste heat recovery mesh belt type dryer Download PDFInfo
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- CN218495746U CN218495746U CN202221281991.1U CN202221281991U CN218495746U CN 218495746 U CN218495746 U CN 218495746U CN 202221281991 U CN202221281991 U CN 202221281991U CN 218495746 U CN218495746 U CN 218495746U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The utility model relates to a waste heat recovery net belt dryer, its characterized in that: including desiccator organism, conveying system, sack cleaner, comdenstion water heat exchanger, tail gas processing system, recovery pipeline, intake stack, preheat pipeline and exhaust emission pipeline, both ends are provided with feed inlet and discharge gate respectively about the desiccator casing, the desiccator organism turn right from a left side by a plurality of independent casing and connect gradually and constitute. The utility model has the advantages of reasonable design, convenient to use carries out the reutilization to the hot water and the steam that flow from the medium outlet of main heat exchanger, reduces steam consumption, eliminates the potential safety hazard because of steam splash brings simultaneously, has solved the problem that exists among the prior art.
Description
Technical Field
The utility model relates to a drying equipment technical field, specificly relate to a waste heat recovery net belt dryer.
Background
With the development of industrial production technology, higher requirements are put forward on drying equipment, high efficiency, low consumption, high quality and low pollution become main indexes of a set of drying equipment, and especially, high efficiency and low consumption have important practical significance on effectively reducing energy consumption, reducing production cost and improving market competitiveness of chemical manufacturers.
The drying equipment mainly used in the production process of paste fine chemical products such as organic pigments comprises the following components: hot air circulating oven, belt drier, rotary flash drier, spray drier, etc. The belt dryer has high production efficiency, high automation degree, stable product quality and high heat efficiency, is more and more popularized along with the continuous improvement and improvement of the belt dryer, and becomes the first choice equipment of a drying unit in the production process of paste fine chemical products such as organic pigments and the like. However, in the use process of the existing belt dryer, the high-temperature gas used for heating is often directly discharged after being dried, which causes great waste of energy, so that it is very important to design a waste heat recovery mesh belt dryer to solve the above problems.
Disclosure of Invention
The utility model discloses a solve above-mentioned problem and designed a waste heat recovery guipure formula desiccator, not only preheat the gas that gets into in the drying chamber through the comdenstion water heat exchanger, carry into in the pre-drying section heating chamber after the reheating through the heating gas in retrieving the drying chamber in addition, carry out the reuse, played the resource that reduces energy consumption and resources are saved, increased practicality.
In order to solve the technical problem, the utility model provides a waste heat recovery mesh belt dryer, its characterized in that: including desiccator organism, conveying system, sack cleaner, comdenstion water heat exchanger, tail gas processing system, recovery pipeline, intake stack, preheating pipe way and tail gas discharge pipeline, both ends are provided with feed inlet and discharge gate respectively about the desiccator casing, the desiccator organism turn right from a left side and connect gradually and constitute by a plurality of independent casing, a plurality of independent casing is linked together in proper order, wherein are close to half independent casing constitution predrying section heating chamber of feed inlet, the drying chamber is constituteed to the independent casing of all the other half several, the casing in set up vertically to be provided with the baffle, the baffle separate into conveying chamber and gas heating chamber with the inner space of casing, the through-hole that is used for conveying chamber and gas to be linked together is all seted up at the upper and lower both ends of baffle, conveying system set up in the desiccator organism and pass through a plurality of conveying chamber in proper order, the intake stack set up in one side of desiccator organism and its and the gaseous heating chamber of drying chamber be linked together, the intake stack be linked together with the gas outlet of comdenstion water heat exchanger, the heat transfer pipeline one end of recovery pipeline is connected at the top of drying chamber, the other end of recycling pipe way is linked together again with preheating pipe way the exhaust stack of preheating pipe way the drying section and tail gas discharge pipeline, the exhaust stack of drying section is also linked together.
Further: the top of the pre-drying section heating chamber is provided with a first flow guide pipeline, the first flow guide pipeline is communicated with the conveying chamber and is connected with the tail gas discharge pipeline through a second flow guide pipeline, and the top of the conveying chamber of the pre-drying section heating chamber is also provided with a first fan used for heating gas to circulate.
And further: the top of the drying chamber is provided with a third diversion pipeline which is communicated with the gas heating chamber and is connected with the recovery pipeline through a fourth diversion pipeline, and the top of the gas heating chamber of the drying chamber is also provided with a second fan used for heating gas to circulate.
And further: electric heating devices are arranged in the pre-drying section heating chamber and the plurality of gas heating chambers of the drying chamber.
And further: the tail gas treatment system is a spray absorption wet dust collector.
After the structure is adopted, the utility model has reasonable structural design, the hot water and the hot gas after the heat exchange of the main heat exchanger are secondarily utilized, the air is preheated, the air can be heated to a higher temperature during the secondary heating, and the total steam consumption during the material drying can be reduced; simultaneously, the heat in the steam is by more utilization, and final emission is hot water basically, does not have high temperature steam to discharge basically, has reduced the potential safety hazard that high temperature steam splash caused, in addition, uses the utility model discloses belt dryer preheats because of the air, can reduce because of the air inlet temperature fluctuation that the environmental change brought, can make temperature in the drying tower more steady, avoids the product quality problem that the temperature fluctuation brought.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a block diagram of an exhaust gas treatment system.
FIG. 3 is a structural view of a bag-type dust collector.
Fig. 4 is an internal structure view of a pre-drying section heating chamber.
Fig. 5 is an internal structure view of the drying chamber.
Detailed Description
As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the waste heat recovery mesh belt type dryer comprises a dryer body 1, a conveying system 16, a bag-type dust collector 7, a condensed water heat exchanger 4, a tail gas treatment system 9, a recovery pipeline 15, an air inlet pipeline 6, a preheating pipeline 10 and a tail gas discharge pipeline 24, the left end and the right end of the dryer shell are respectively provided with a feed inlet 1-1 and a discharge outlet 1-2, the dryer body is formed by connecting a plurality of independent shells from left to right in sequence, the independent shells are communicated in sequence, wherein half of the independent shells close to the feed inlet form a pre-drying section heating chamber, the other half of the shells form a drying chamber, a baffle plate is vertically arranged in the shell and divides the inner space of the shell into a conveying chamber and a gas heating chamber, the upper end and the lower end of the clapboard are both provided with through holes for communicating the conveying chamber with the gas heating chamber, the conveying system is arranged in the dryer body and sequentially passes through a plurality of conveying chambers, the air inlet pipeline is arranged at one side of the dryer body and is communicated with half of the gas heating chambers of the drying chambers, the air inlet pipeline is communicated with a heat exchange air outlet of the condensed water heat exchanger, one end of the recovery pipeline is connected with the top of the drying chamber, the other end of the recovery pipeline is communicated with a recycling pipeline 8 through a bag-type dust collector, the recycling pipeline is communicated with a preheating pipeline, the preheating pipeline is also arranged at one side of the dryer body and is communicated with seven gas heating chambers of the pre-drying section heating chamber, one end of the tail gas discharge pipeline is connected to the top of the pre-drying section heating chamber, and the other end of the tail gas discharge pipeline is communicated with a tail gas treatment system. The utility model discloses not only preheat the gas that gets into in the drying chamber through the comdenstion water heat exchanger, carry into in the pre-drying section heating chamber after the heating gas reheating in the drying chamber through retrieving moreover, carry out the reuse, played the resource that reduces energy consumption and resources are saved, increased practicality.
The feed inlet of the dryer body is communicated with the paste wet material forming system, the position of the dryer body close to the feed inlet is also provided with a material distribution system, the material distribution system is a belt in compound motion, and the extruded and formed materials are uniformly paved on a conveying system through two-dimensional motion. The belt type drying is widely applied to other industries for a long time, but the use of paste fine chemical industries such as organic pigments and the like is very little; the main reason is that cake-shaped fine chemical products cannot be directly dried by a belt dryer and must be pre-formed by the belt dryer, so that the selection of a set of suitable forming system has great influence on the efficiency of the belt dryer, and the system has direct influence on drying uniformity, equipment production capacity, energy consumption and tail gas treatment device. The drying time can be shortened by uniformly molding the materials, the production efficiency is improved, and the consumption is reduced. The drying time can be artificially increased due to the uneven forming, meanwhile, the material spreading on the whole net surface is uneven, the hot air is short-circuited, the moisture discharging temperature is increased, and the energy is wasted. The dust is seriously entrained, and the load of the tail gas treatment device is increased.
The conveying system adopts a mesh belt to be dragged by chains at two sides and rotates in a drying box, the bearing capacity of the mesh belt is considered in the conveying system, and because wet materials are heavy, the supporting rods under the mesh belt must be dense, and one supporting rod is generally connected with one supporting rod; the two sides of the mesh belt are provided with the baffle plates, so that on one hand, material leakage is prevented, and on the other hand, hot air short circuit is prevented, and the drying capacity is influenced.
As shown in fig. 4, a first diversion pipeline 18 is arranged at the top of the pre-drying section heating chamber, the first diversion pipeline is communicated with the conveying chamber and is connected with the tail gas discharge pipeline through a second diversion pipeline 19, and a first fan for circulating the heating gas is further arranged at the top of the conveying chamber of the pre-drying section heating chamber; the top of the drying chamber is provided with a third diversion pipeline 21 which is communicated with the gas heating chamber and is connected with the recovery pipeline 15 through a fourth diversion pipeline, and the top of the gas heating chamber of the drying chamber is also provided with a second fan for heating gas to circulate. Circulating hot air in the shell is uniformly distributed on the whole net surface as much as possible, so the design of the air-out and air-returning position is reasonable, the phenomenon of hot air short circuit is avoided as much as possible, and because the volume heat transfer coefficient is related to the air speed of passing materials in the drying process, the air speed of passing the materials is improved, the volume heat transfer coefficient can be increased, and the drying capacity can be improved in the constant-speed drying stage. The wind shields are added on the two sides of the mesh belt, and because the resistance of the mesh belt is increased after feeding, hot air is likely to circulate from the two sides of the mesh belt in a short circuit mode, and the drying efficiency is reduced. And the air speed can be adjusted through the arranged first fan and the second fan, so that the drying is better carried out.
The pre-drying section heating chamber as shown in fig. 1 and the several gas heating chambers of the drying chamber are provided with electric heating means 11.
The tail gas treating system is a wet spraying and absorbing dust collector comprising bearing plate, light balls, blocking net and defoaming unit, and the bearing plate has certain amount of light spherical stuffing, which is suspended to form turbulent rotation and collision to contact closely with gas and liquid for effective mass transfer, heat transfer and dust removal. In addition, because the small balls move irregularly, the surfaces of the small balls are always collided and washed, and the small balls can generate self-cleaning action at a certain air speed of the air tower, are not easy to block and are widely applied to waste gas purification. The tail gas treatment system develops the concept of a fluidized bed into gas-liquid mass transfer equipment, so that the filler in the spray tower is in a fluidized state, and the dust removal effect is enhanced. The method is characterized in that: high gas speed, high treating capacity, light tower weight, homogeneous vapor-liquid distribution and less jamming of solid and viscous material. Particularly, the tower diameter can be greatly reduced and the tower height can be reduced because the turbulence in the tower is strong. The dust remover has larger air handling capacity, the air velocity of an empty tower is 1.5-6.0 m/s, the spraying density is 20-110 m & lt 3 & gt/(m & lt 2 & gth), and the pressure loss is less than 1000Pa. The efficiency of the specially designed demisting device can reach 98-99%, and the demisting device has a simple structure and a small pressure drop.
In the prior art, the water evaporation capacity of an organic pigment is probably 152kg/h (the temperature of inlet and outlet air is unchanged, the water evaporation capacity of a dryer is unchanged), the initial water content is 0-52% (wet basis), the final water content after drying is 0-1% (wet basis), a drying heat source of the organic pigment usually adopts saturated steam, the drying mixing temperature is 80-90 ℃, the exhaust air temperature is 50-75 ℃, a pre-drying section of a tail gas dust removal part of the organic pigment usually adopts a water film dust remover and a drying section of a bag dust remover, and the water evaporation capacity of the organic pigment is as follows: w Water (W) =152kg/h; yield of dry product: w is a group of Dry matter ＝W Water (I) ×(1－ω 1 )÷(ω 1 －ω 2 ) (ii) a Wet treatment amount: w Wet =152+143=295kg/h; steam consumption per ton of dry material: 546 kg/h/143 kg/h approximatively 3.82 tons Steam generating device Per ton of Product(s) (ii) a And the tail gas of the drying section is recycled after the design is adopted: the exhaust temperature of the tail gas of the drying section is 75 ℃ below zero, and the tail gas is used as fresh air of the pre-drying section, so that the energy can be saved: q. q.s 1 =6000 × 0.245 × (75-15) =88200kcal/h; this design is through the waste heat utilization of comdenstion water: the temperature before and after the waste heat utilization of the condensed water is 140 ℃ and 75 ℃; can save energy: q. q.s 2 =546 × 1 × (140-75) = 35490kcal/h; the waste heat that this design passed through the comdenstion water can improve dry section new trend temperature difference be Δ t = 35490 divided by 6000 divided by 0.245=24 ℃, the new trend temperature is ~ 39 ℃, but recycle's heat: q. q of 1 +q 2 = 88200+35490=123690kcal/h, economized steam consumption: 123690 ÷ 500=247kg/h; the heat required by fresh air temperature rise of the pre-drying section is as follows: 6000X 0.245X (110-75) =51450kcal/h, heat required by fresh air temperature rise in the drying section: 6000X 0.245 function(110-39) =104370kcal/h, steam consumption per hour: 51450 +104370) ÷ 500=312kg/h, steam consumption check: 312 (the running steam consumption of the waste heat recovery mesh belt dryer) +247 (the steam consumption which can be saved) =559kg/h ≈ 546kg/h (the steam consumption of the mesh belt dryer in the prior art); steam energy consumption of each ton of product of the waste heat recovery mesh belt dryer: 312kg/h 143kg/h ≈ 2.18 ton Steam generating device Ton of Product(s) (ii) a The energy consumption of steam of each ton of products of the mesh belt dryer in the prior art is as follows: 546 kg/h/143 kg/h ≈ 3.82 ton Steam generation Ton of Product(s) (ii) a Energy-conserving efficiency of waste heat recovery guipure desiccator: 312kg/h 546kg/h 57%, energy saving 40%.
To sum up, the utility model has reasonable structural design, secondarily utilizes the hot water and the hot gas after the heat exchange of the main heat exchanger, preheats the air, can heat the air to a higher temperature during the secondary heating, and can reduce the total steam consumption during the drying of the materials; simultaneously, the heat in the steam is by more utilization, and final emission is hot water basically, does not have high temperature steam to discharge basically, has reduced the potential safety hazard that high temperature steam splash caused, in addition, uses the utility model discloses belt dryer preheats because of the air, can reduce because of the air inlet temperature fluctuation that the environmental change brought, can make temperature in the drying tower more steady, avoids the product quality problem that the temperature fluctuation brought.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that various modifications and decorations can be made by those skilled in the art without departing from the principle of the present invention, and the scope of the present invention should be considered as the protection scope of the present invention.
Claims (5)
1. The utility model provides a waste heat recovery net belt dryer which characterized in that: comprises a dryer body (1), a conveying system (16), a bag-type dust remover (7), a condensed water heat exchanger (4), a tail gas treatment system (9), a recovery pipeline (15), an air inlet pipeline (6), a preheating pipeline 10) and a tail gas discharge pipeline (24), wherein the left end and the right end of the dryer shell are respectively provided with a feed inlet (1-1) and a discharge outlet (1-2), the dryer body is formed by connecting a plurality of independent shells in sequence from left to right, the plurality of independent shells are communicated in sequence, wherein the half of the independent shells close to the feed inlet form a pre-drying section heating chamber, the other half of the independent shells form a drying chamber, the shell is internally provided with a vertical baffle which separates the inner space of the shell into the conveying chamber and a gas heating chamber, the upper end and the lower end of the baffle are provided with through holes for communicating the conveying chamber with the gas heating chamber, the conveying system is arranged in the dryer body and sequentially passes through the plurality of conveying chambers, the air inlet pipeline is arranged at one side of the dryer body and is communicated with the half of the air inlet pipeline of the drying chamber, the heat exchange pipeline is connected with one end of the condensed water heat exchanger, the pre-drying chamber is also communicated with the top of the preheating pipeline, the drying chamber, the other end of the pre-drying chamber is communicated with the drying chamber through the drying pipeline (8), one end of the tail gas discharge pipeline is connected to the top of the pre-drying section heating chamber, and the other end of the tail gas discharge pipeline is communicated with a tail gas treatment system.
2. The waste heat recovery mesh belt dryer of claim 1, characterized in that: the top of the pre-drying section heating chamber is provided with a first flow guide pipeline (18), the first flow guide pipeline is communicated with the conveying chamber and is connected with the tail gas discharge pipeline through a second flow guide pipeline (19), and the top of the conveying chamber of the pre-drying section heating chamber is also provided with a first fan for circulating heating gas.
3. The waste heat recovery mesh belt dryer of claim 1, characterized in that: the top of the drying chamber is provided with a third diversion pipeline (21), the third diversion pipeline is communicated with the gas heating chamber and is connected with a recovery pipeline (15) through a fourth diversion pipeline, and the top of the gas heating chamber of the drying chamber is also provided with a second fan for heating gas to circulate.
4. The waste heat recovery mesh belt dryer of claim 1, characterized in that: electric heating devices (11) are arranged in the pre-drying section heating chamber and a plurality of gas heating chambers of the drying chamber.
5. The waste heat recovery mesh belt dryer of claim 1, characterized in that: the tail gas treatment system is a spray absorption wet dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281991.1U CN218495746U (en) | 2022-05-26 | 2022-05-26 | Waste heat recovery mesh belt type dryer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281991.1U CN218495746U (en) | 2022-05-26 | 2022-05-26 | Waste heat recovery mesh belt type dryer |
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| CN218495746U true CN218495746U (en) | 2023-02-17 |
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| CN202221281991.1U Active CN218495746U (en) | 2022-05-26 | 2022-05-26 | Waste heat recovery mesh belt type dryer |
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- 2022-05-26 CN CN202221281991.1U patent/CN218495746U/en active Active
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