CN202902754U - Device for converting waste heat steam by steam jet pump - Google Patents

Device for converting waste heat steam by steam jet pump Download PDF

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Publication number
CN202902754U
CN202902754U CN 201220580948 CN201220580948U CN202902754U CN 202902754 U CN202902754 U CN 202902754U CN 201220580948 CN201220580948 CN 201220580948 CN 201220580948 U CN201220580948 U CN 201220580948U CN 202902754 U CN202902754 U CN 202902754U
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steam
jet pump
communicated
internal heat
fluid bed
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CN 201220580948
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张继军
吴玉蕾
张伟
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GONGDA CHEMICAL EQUIPMENT CO Ltd SHIJIAZHUANG
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GONGDA CHEMICAL EQUIPMENT CO Ltd SHIJIAZHUANG
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Abstract

The utility model discloses a device for converting waste heat steam by a steam jet pump and belongs to the field of drying technology. The device comprises an internally-heated fluidized bed, a flash tank, a dry dust collector, a steam jet pump and a humidifier. A steam inlet of the internally-heated fluidized bed is communicated with a steam outlet of the humidifier. A condensate outlet of the internally-heated fluidized bed is communicated with an inlet of the flash tank. A condensate outlet of the flash tank is communicated with a condensate inlet of the humidifier. A water heat steam outlet of the internally-heated fluidized bed is communicated with the dry dust collector. A steam outlet of the dry dust collector and a steam outlet of the flash tank are communicated with a low-temperature steam inlet of the steam jet pump. A high-temperature steam inlet of the steam jet pump is communicated with a steam master pipe. A steam outlet of the steam jet pump is provided with two pipes respectively communicated with the internally-heated fluidized bed and the humidifier. Superheated steam is used as fluidizing drying medium, so that moisture evaporated by material can be brought away and non-condensable gas is avoided.

Description

Utilize steam jet pump to transform the device of waste hot steam
Technical field
The utility model belongs to technical field of drying, specifically a kind of steam jet pump device that the waste hot steam that produces in the internal heat type fluid bed is recycling that utilizes.
Background technology
The dry materials operation is one of important production process of every profession and trade, its objective is that the mode of utilizing heating removes wet part in product or the semi-finished product, make material be more convenient for transportation, store or further process and use.The process of dry materials is a production process that energy consumption is larger, concerning the country of the such energy relative deficiency of China, develop energy-saving dry technology and excavate the energy-saving potential that has dry technology now, it is a very important task, Chinese patent literature CN102494526A and CN102494525A disclose a kind of method of utilizing steam jet pump to reclaim the drier waste hot steam for this reason, this method is to utilize steam jet pump with the high-quality steam of inferior waste hot steam boil down to, returns new technology recycling in the drier again.Now this technology is applied to the internal heat type fluidized bed dryer, and this technique is improved.The internal heat type fluidized bed dryer, in the fluid bed bed, to bury internal heater underground, dry run institute calorific requirement mainly is to be provided by built-in heat exchanger, and the hot blast of the fluid media (medium) that the internal heat type fluidized bed drying needs for generating for air heat, produce unavoidably fixed gas owing to the continuous introducing of hot blast in the system, fixed gas refers to the in working order lower gas that can't be re-condensed into liquid refrigerant, the existence of fixed gas can make the Efficiency Decreasing of compressor, just becomes urgent problem so eliminate fixed gas.
The utility model content
The utility model technical issues that need to address provide a kind of superheated steam and recycling device of waste hot steam can being converted into, adopt this device to carry out dry materials, not only can eliminate the condition of fixed gas generation to solve the problem of fixed gas, but also can carry out redrying to wet stock, can improve drying efficiency, lower drying cost.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
Utilize steam jet pump to transform the device of waste hot steam, comprise internal heat type fluid bed for the oven dry wet stock, be used for the condensed water that flash distillation internal heat type fluid bed condensation-water drain discharges flash tank, be used for to the waste hot steam that the waste hot steam outlet of internal heat type fluid bed is discharged carry out dedusting dry collector, be used for the steam jet pump of the low-pressure steam boil down to superheated steam that clean steam that dry collector is discharged and flash tank flash off and to the humidifier of superheated steam humidification;
The steam inlet of described internal heat type fluid bed is communicated with the steam (vapor) outlet of the humidifier of saturated vapor with carry oven dry for the internal heat type fluid bed by pipeline, the condensation-water drain of internal heat type fluid bed is communicated with the entrance of flash tank by pipeline, and described flash tank condensation-water drain is communicated with the condensing water inlet of humidifier through condensate pump by pipeline;
The waste hot steam outlet of described internal heat type fluid bed is communicated with dry collector by pipeline, the steam (vapor) outlet of dry collector and the steam (vapor) outlet of flash tank are communicated with the Low Temperature Steam entrance of steam jet pump by pipeline, and the high-temperature steam entrance of described steam jet pump is communicated with the main steam range of high temperature saturated vapor is provided for steam jet pump;
The superheated steam outlet of described steam jet pump arranges the two-way pipeline and is communicated with the steam inlet of internal heat type fluid bed and humidifier respectively.
Because the technological progress of having adopted technique scheme, the utility model to obtain is:
The utility model is converted into superheated steam with waste hot steam and as the utilization of fluidized drying medium circulation, not only eliminated the condition that fixed gas produces, solved the problem of fixed gas, but also wet stock is carried out redrying, improve drying efficiency, lowered drying cost.
The superheated steam outlet of steam jet pump of the present utility model arranges the two-way pipeline, one road pipeline is communicated with the internal heat type fluid bed, replace hot-air to introduce in the internal heat type fluid bed as the fluidized drying medium a part of superheated steam of steam jet pump output, not only solved the water vapour utilization difficulty that original hot blast is taken out of as the fluidized drying medium, and the impurity of carrying secretly in the tail gas is not allowed tractable problem, and superheated steam is during as the fluidized drying medium, in the whole system no longer the needs because of the fluidized drying medium additionally introduce air, eliminate the condition that fixed gas produces, solved the problem of fixed gas.
Another road pipeline that is communicated with the superheated steam outlet of steam jet pump is communicated with the steam inlet of humidifier, another part superheated steam input humidifier with steam jet pump output, and humidification is saturated vapor in humidifier, return in the internal heat type fluid bed recycling, the waste hot steam of not only having avoided the internal heat type fluid bed to discharge directly is discharged in the atmosphere and pollutes, and can also reduce the consumption of live steam.
The utility model as the fluidized drying medium, also has a lot of other advantages with superheated steam.At first, the thermal capacity aspect, superheated steam specific heat is 1.7kJ/ (kg.K), and the specific heat of air only is 1.0kJ/ (kg.K), therefore transmitting the required superheated steam amount of identical heat is significantly smaller than specific air consumption; The Btu utilization difficulty of the water vapour that thermal efficiency aspect, heated-air drying are taken out of, and superheat steam drying can enter steam jet pump and compress rear recycling because the waste gas of its discharge remains steam.
Superheated steam replaces air as the fluidized drying medium, and is especially applicable for easy blast and the dry materials that catches fire.
The waste hot steam that the internal heat type fluidized bed dryer gives off was exactly the product of drying system originally, adopt steam jet pump with the waste hot steam suction and be collapsed into superheated steam as the fluidized drying medium, save device and the energy of extra production fluidized drying medium, reduced cost.
The Superheated Steam Drying Technology that the utility model is introduced is as a kind of emerging energy-saving drying technology, has that superior product quality, heat transmission resistance are little, safety and be beneficial to the advantage such as environmental protection, and this technology has hugely development space in the dry field of China.
Steam jet pump is applied to the utility model, invests littlely because of simple in structure, reduced cost.Steam jet pump also has the pressure rating of Proper Match steam, the needs that can satisfy various steam pressures, temperature and the advantage such as reliable.
Description of drawings
Fig. 1 is layout schematic diagram of the present utility model.
Wherein, 1, the internal heat type fluid bed, 2, dry collector, 3, flash tank, 4, condensate pump, 5, steam jet pump, 6, humidifier.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in further details:
As shown in Figure 1, utilize steam jet pump to transform the device of waste hot steam, comprise internal heat type fluid bed 1, dry collector 2, flash tank 3, condensate pump 4, steam jet pump 5 and humidifier 6.
Wherein internal heat type fluid bed 1 is the equipment of oven dry wet stock, the steam inlet of internal heat type fluid bed 1 is communicated with the steam (vapor) outlet of humidifier 6, the saturated vapor of humidifier 6 outputs flows to the heating tube of internal heat type fluid bed 1, for wet stock being heated and drying.By behind the internal heat type fluid bed 1, a part changes condensed water into from the saturated vapor of humidifier 6, from the condensation-water drain output of internal heat type fluid bed 1.The material inlet of internal heat type fluid bed 1 is used for constantly replenishing wet stock toward internal heat type fluid bed 1, and wet stock becomes dry material after being heated, dehumidifying, drying in internal heat type fluid bed 1, discharges from the material outlet of internal heat type fluid bed 1.
Flash tank 3 is used for the flash distillation condensed water, and the condensation-water drain of internal heat type fluid bed 1 is communicated with by the entrance of pipeline with flash tank 3, will flow to flash tank 3 from internal heat type fluid bed 1 condensed water out.The condensation-water drain of flash tank 3 is communicated with through the condensing water inlet of condensate pump 4 with humidifier 6 by pipeline.Go out a part of steam from the flash vaporization flash tank 3 of internal heat type fluid bed 1 condensed water out, discharged by the steam (vapor) outlet of flash tank 3, remaining condensed water flows to humidifier 6 by the condensation-water drain of flash tank 3 through condensate pump 4 after the flash distillation.
The waste hot steam outlet of internal heat type fluid bed 1 is communicated with dry collector 2 by pipeline, the steam (vapor) outlet of the steam (vapor) outlet of dry collector 2 and flash tank 3 is communicated with the Low Temperature Steam entrance of steam jet pump 5 by pipeline, the high-temperature steam entrance of described steam jet pump 5 is communicated with main steam range, and main steam range provides the high temperature saturated vapor for steam jet pump 5.Producing waste hot steam after the heating tube heating of wet stock in the internal heat type fluid bed 1 through being connected with saturated vapor discharges from the waste hot steam outlet, be converted into clean steam through dry collector 2 dedustings, the steam that flashes off with flash tank 3 converges to, advance steam jet pump 5 from the common input of the Low Temperature Steam entrance of steam jet pump 5, the Low Temperature Steam of discharging by steam jet pump 5 suctions and compression dry collector 2 and flash tank 3 from the high temperature saturated vapor of main steam range becomes superheated steam.Also be provided with atmospheric valve on the pipeline of the Low Temperature Steam entrance of connection steam jet pump 5, be used for discharging the fixed gas of the minute quantity that produces when this device is started working.
The superheated steam outlet of steam jet pump 5 arranges the two-way pipeline, and one road pipeline is communicated with internal heat type fluid bed 1, and namely a part of superheated steam from steam jet pump 5 outputs returns the internal heat type fluid bed 1 as the fluidized drying medium; Another road pipeline is communicated with the steam inlet of humidifier 6, and another part superheated steam of steam jet pump 5 output is flowed to humidifier 6, and interior at humidifier 6 is saturated vapor through residue condensed water humidification.
The steam (vapor) outlet of humidifier 6 is by the steam inlet of pipeline communication to internal heat type fluid bed 1, the saturated vapor that generates in humidifier 6 turns back in the heating tube of internal heat type fluid bed 1 wet stock in the internal heat type fluid bed 1 is heated, dries, and waste hot steam is able to recycling.
Production procedure of the present utility model is:
A, dry run: will pass in the heating tube of internal heat type fluid bed 1 from the saturated vapor of main steam range through steam jet pump 5 and humidifier 6, again with continuous being added in the internal heat type fluid bed 1 of wet stock, saturated vapor is converted into condensed water to wet stock heating rear portion, is discharged by the condensation-water drain of internal heat type fluid bed 1.Become dry material after wet stock is heated, dried by saturated vapor and discharged by the material outlet of internal heat type fluid bed 1, evaporate simultaneously a certain amount of used heat steam and discharged by the waste hot steam outlet of internal heat type fluid bed 1.The temperature of saturated vapor is between 110 ℃ ~ 120 ℃ in the present embodiment, and pressure is between 0.04 ~ 0.1MpaG.The waste hot steam that evaporates is that temperature is about 100 ℃ under the normal pressure.
B, flash process: the condensed water that the condensation-water drain of internal heat type fluid bed 1 is discharged passes in the flash tank 3, flash off 3 synthermal with flash tank, with a certain amount of low-pressure steam of pressure, discharged by the steam (vapor) outlet of flash tank 3.After the flash distillation remaining and flash tank 3 synthermal, pass into humidifier 6 with the condensed water of pressure by condensate pump 4 parts, a part then is used for heating unclassified stores or back boiler reuse from pipeline output in addition.In the present embodiment, the temperature of remaining condensed water is lower 95 ℃ ~ 105 ℃ of normal pressure after the low-pressure steam that flashes off in flash tank 3, the flash tank 3 and the flash distillation.
C, dust removal process: carried a certain amount of dust secretly from the waste hot steam that the waste hot steam outlet of internal heat type fluid bed 1 is discharged, carry out dedusting in the dry collector 2 so at first it is passed into, waste hot steam enters from the steam inlet of dry collector 2, dust is then discharged from the dust export of dry collector 2, clean steam through dedusting is discharged from the steam (vapor) outlet of dry collector 2, the low-pressure steam that flashes off with flash tank 3 converges, and jointly inputs steam jet pump 5.
D, compression process: aspirate together and the boil down to superheated steam from the clean steam that the high temperature saturated vapor of main steam range is discharged low-pressure steam and the dry collector 2 of the discharge of flash tank 3 tops by steam jet pump 5.In the present embodiment, between 165 ℃ ~ 185 ℃, pressure is between 0.6 MpaG ~ 1.0MpaG from the temperature of the high temperature saturated vapor of main steam range.The superheat steam temperature that steam jet pump 5 is discharged is between 110 ℃ ~ 130 ℃, and pressure is between 0 MpaG ~ 0.1MpaG, and the compression ratio of steam jet pump 5 is between 1.0 ~ 2.0, and expansion ratio is between 5 ~ 15.
E, fluidized drying process: the superheated steam part that steam jet pump 5 is discharged passes in the internal heat type fluid bed 1 as the fluidized drying medium, wet part of overflowing in the wet stock dry run is taken away rapidly, also further augmentation of heat transfer and dry run, and prevent moisture dewfall in internal heat type fluid bed 1 cylinder inboard wall and discharge duct.This part superheated steam after the cooling becomes waste hot steam that saturated vapor evaporates with wet stock, and to pass into dry collector 2 recycling.
F, humidification: usually adopt saturated vapor that material is heated in the internal heat type fluid bed 1, has the high advantage of heat exchange efficiency, therefore remaining superheated steam will be passed into the condensed water that adopts flash tank 3 to discharge in the humidifier 6 is saturated vapor with its humidification, humidification liquid adopts flash tank residue condensed water, reclaims condensed water heat.In the present embodiment, the saturated-steam temperature behind the humidification is between 100 ℃ ~ 120 ℃, and pressure is between 0 MpaG ~ 0.1MpaG.
H, cyclic process: the saturated vapor behind the humidification returns internal heat type fluid bed 1 and carries out recycling.In the present embodiment, can save high temperature saturated vapor about 60% ~ 70%.

Claims (1)

1. utilize steam jet pump to transform the device of waste hot steam, it is characterized in that: comprise the internal heat type fluid bed (1) for the oven dry wet stock, the flash tank (3) that is used for the condensed water of flash distillation internal heat type fluid bed (1) condensation-water drain discharge, be used for dry collector (2) that the waste hot steam that the waste hot steam outlet of internal heat type fluid bed (1) is discharged is carried out dedusting, be used for the steam jet pump (5) of the low-pressure steam boil down to superheated steam that clean steam that dry collector (2) is discharged and flash tank (3) flash off and to the humidifier (6) of superheated steam humidification;
The steam inlet of described internal heat type fluid bed (1) is communicated with the steam (vapor) outlet of the humidifier (6) of saturated vapor with carry oven dry for internal heat type fluid bed (1) by pipeline, the condensation-water drain of internal heat type fluid bed (1) is communicated with by the entrance of pipeline with flash tank (3), and described flash tank (3) condensation-water drain is communicated with through the condensing water inlet of condensate pump (4) with humidifier (6) by pipeline;
The waste hot steam outlet of described internal heat type fluid bed (1) is communicated with dry collector (2) by pipeline, the steam (vapor) outlet of the steam (vapor) outlet of dry collector (2) and flash tank (3) is communicated with by the Low Temperature Steam entrance of pipeline with steam jet pump (5), the high-temperature steam entrance of described steam jet pump (5) with provide the main steam range of high temperature saturated vapor to be communicated with for steam jet pump (5);
The superheated steam outlet of described steam jet pump (5) arranges the two-way pipeline and is communicated with the steam inlet of internal heat type fluid bed (1) and humidifier (6) respectively.
CN 201220580948 2012-11-07 2012-11-07 Device for converting waste heat steam by steam jet pump Active CN202902754U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018103539A1 (en) * 2016-12-05 2018-06-14 四川大学 Steam heat pump and low-pressure steam enthalpy supplementing and pressurizing utilization method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018103539A1 (en) * 2016-12-05 2018-06-14 四川大学 Steam heat pump and low-pressure steam enthalpy supplementing and pressurizing utilization method

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