CN217594266U

CN217594266U - Steam recovery device

Info

Publication number: CN217594266U
Application number: CN202221355613.3U
Authority: CN
Inventors: 李阳春; 喻德良; 李宁燕
Original assignee: Zhejiang Yuancheng Metallurgical Technology Development Co ltd
Current assignee: Zhejiang Yuancheng Metallurgical Technology Development Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-10-18
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses a steam recovery device, include, waste steam pretreatment mechanism, calcium oxide release can purify mechanism, separation recovery mechanism, compare with prior art, the utility model discloses utilize iron and steel enterprise's iron-making, steelmaking and coloured, chemical industry, papermaking, power plant, sugar manufacturing, external low temperature high humidity exhaust steam of arranging in industrial production such as bio-pharmaceuticals as reaction medium and heat transfer medium, carry out the energy release reaction with calcium oxide, release the pollutant in energy and the desorption waste gas.

Description

Steam recovery device

Technical Field

The utility model relates to an exhaust steam retrieves technical field, particularly, relates to a steam recovery device.

Background

In the industrial production processes of steel, color, chemical industry, power generation, paper making and the like, a large amount of high-humidity low-temperature 60-120 ℃ waste heat and waste steam is generated, the high-humidity low-temperature steam is mainly discharged to the high altitude through a steam discharging cylinder, the phenomenon of high-humidity smoke white feather occurs, a white pollution mark is visible everywhere, resource waste and environmental pollution are caused, the formation of haze in the air is aggravated, and a large amount of water steam waste is caused. Although a large number of international and domestic researchers research the recycling method and make remarkable progress, the recycling method of the high-humidity low-temperature waste heat and waste steam is greatly limited due to the low temperature and complex components of the low-temperature waste heat and steam, high direct recycling application cost and low efficiency, and difficulty in obtaining stable operation all the year round. Meanwhile, the low-temperature circulating water generated in industrial production needs to be cooled by a cooling tower, and white smoke floats everywhere except in summer in one year, so that the environment is influenced, and a large amount of water and low-temperature energy are wasted. In view of the above, there is a need to fundamentally find a comprehensive problem that can not only recover high-humidity low-temperature waste steam and waste water heat, but also solve white visual pollution and the like.

For example, in the production of the steel industry, high-temperature liquid slag (1350 ℃ -1500 ℃) is generated during blast furnace smelting, 10 hundred million tons of molten iron are produced domestically every year, and 3 hundred million tons of high-temperature liquid slag are generated. Blast furnace production generally adopts a water quenching method to treat blast furnace slag, a large amount of steam is generated in the slag flushing process to cause water consumption, desulfurization waste water generated by treatment of various flue gases and the like in a steel plant exists, high-concentration waste water generated by a sewage treatment station, even phenol-cyanogen waste water generated by coal gas, is sent to the blast furnace slag flushing to be evaporated, the steam comprises toxic and harmful pollutants and smoke dust, and is carried with a large amount of SOx and H2S to be directly emitted into the atmosphere by the temperature of slag flushing steam (70-100 ℃), so that serious environmental pollution is caused, and the water slag steam is weakly acidic, and if the water slag steam is formed into water drops when meeting cold after being discharged to high altitude, the water drops can also cause corrosion and damage to surrounding equipment and steel structures. Although a large amount of sewage is digested and discharged by the sewage is greatly reduced in the existing water granulated slag process, the existing water granulated slag process belongs to transfer of pollutants and even dangerous wastes rather than radical treatment, has an open pollution property, causes the slag flushing field environment to be severe, wastes water resources, and takes a 3800m & lt 3 & gt blast furnace as an example, the instantaneous amount of exhaust steam in the slag flushing process is as high as about 350 t/h.

For example, in a steel slag treatment system in a metallurgical steelmaking process, a roller method, a hot splashing method, a hot stuffiness method and the like are mainly adopted at present, and no matter which process is adopted, high-temperature converter steel slag at about 1400 ℃ is treated, and finally a large amount of waste steam is discharged; wherein the hot splashing method and the hot stuffiness method adopt an open type, static slow cooling and first cooling and then crushing treatment process, the flow is long, the occupied area is large, and the open type operation causes serious dust pollution. The roller method with higher acceptance in the market at present has the characteristics of a three-in-one technology, a slag non-landing technology, cleanness, short flow and resource utilization, meets the requirements of the current society on environmental protection and recycling of solid waste resources, and has obvious social environmental protection benefits and technical economic advantages. Although a large amount of discharged steam can be recovered for secondary utilization or power generation in the initial stage, the heat energy of 60-120 ℃ of the externally discharged waste steam is still not recovered, and the discharged waste steam contains about 50-100mg/Nm & lt 3 & gt of particulate matter emission concentration and pollutes the environment.

In view of the above circumstances, it is necessary to find a method that can recover high-humidity low-temperature waste steam and waste water heat, eliminate the pollution problem of particulate matters and sulfides, solve the comprehensive production problems such as white visual pollution, realize the efficient utilization of waste steam resources, and realize the zero discharge of industrial production processes.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a greenization, cleaning, energy-conserving steam recovery unit who releases can make the high humidity low temperature exhaust steam that the industrial production process produced carry temperature, dust fall, retrieve the waste heat and eliminate "white feather" phenomenon, realize "zero release".

In order to solve the above problem, the utility model provides a steam recovery device, include:

waste steam pretreatment mechanism: the waste steam pre-treatment mechanism is used for raising the temperature, reducing the humidity and reducing the dust of the high-humidity low-temperature waste steam, and an air inlet of the waste steam pre-treatment mechanism is connected with a high-humidity low-temperature waste steam conveying pipe;

calcium oxide energy release purification mechanism: the device is used for obtaining high-temperature purified steam after the pretreated waste steam is subjected to calcium oxide energy release and purification, and an air inlet of the calcium oxide energy release purification mechanism is connected with an air outlet of the waste steam pretreatment mechanism;

separation and recovery mechanism: the device is used for recovering calcium hydroxide powder obtained after the calcium hydroxide powder passes through the calcium oxide energy-releasing purification mechanism, separating and recovering high-temperature purification steam which is obtained by the calcium oxide energy-releasing purification mechanism and wraps the calcium hydroxide powder, and the separation and recovery mechanism is connected with the calcium oxide energy-releasing purification mechanism.

As preferredly, waste steam pretreatment mechanism is including raising the temperature and lowering the humidity room, first calcium oxide feeding bin and two-stage dust fall ware, the air inlet and the high humidity low temperature waste steam conveyer pipe of raising the temperature and lowering the humidity room link to each other, the gas outlet of the room that lowers the temperature with the air inlet of two-stage dust fall ware links to each other, the gas outlet of two-stage dust fall ware with venturi's air inlet links to each other, the upper end of the room that lowers the temperature is provided with the feed inlet, the feed inlet with the discharge gate in storehouse is fed to first calcium oxide links to each other.

Preferably, the calcium oxide energy releasing and purifying mechanism comprises a primary calcium oxide energy releasing and purifying structure and a secondary calcium oxide energy releasing structure, the primary calcium oxide energy releasing and purifying structure comprises a first energy releasing chamber, a second calcium oxide feeding bin, an additive feeding bin, a first spiral feeder and a first material turning mixer, an air inlet of the first energy releasing chamber is connected with an air outlet of the venturi tube, a calcium oxide feeding port and an additive feeding port are formed in the first energy releasing chamber, the calcium oxide feeding port is connected with a discharging port of the second calcium oxide feeding bin, the additive feeding port is connected with a discharging port of the additive feeding bin, a discharging port of the first energy releasing chamber is connected with the secondary calcium oxide energy releasing structure through a first valve, the first spiral feeder and the first material turning mixer are both fixedly arranged in the first energy releasing chamber, and a first motor for driving the first spiral feeder and the first material turning mixer to move simultaneously is arranged on the first energy releasing chamber.

Preferably, the secondary calcium oxide energy release structure comprises a second energy release chamber, and a second spiral feeder and a second material turning stirrer which are fixedly arranged in the second energy release chamber, the second energy release chamber is connected with the separation and recovery mechanism, a feed inlet of the second energy release chamber is connected with a discharge outlet of the first energy release chamber through the first valve, and a second motor for driving the second spiral feeder and the second material turning stirrer to move simultaneously is arranged on the second energy release chamber.

Preferably, the separation and recovery mechanism comprises a gas recovery storage tank, a solid recovery storage tank and a separation structure, a gas inlet of the gas recovery storage tank is connected with a gas outlet of the separation structure, a feed inlet of the solid recovery storage tank is respectively connected with a discharge outlet of the separation structure and a discharge outlet of the second energy release chamber, and pneumatic conveyors are arranged on pipelines connecting the feed inlet of the solid recovery storage tank with the discharge outlet of the separation structure and the discharge outlet of the second energy release chamber.

Preferably, the separation structure comprises a pulse separator, a fan, a steam drum and a superheater, wherein a gas outlet of the second energy release chamber is communicated with a gas inlet of the pulse separator through a heat insulation pipeline, a discharge port of the pulse separator is connected with a feed port of the solid recovery storage tank, a gas outlet of the pulse separator is connected with a gas inlet of the fan, a gas outlet of the fan is connected with a gas inlet of the steam drum, a gas outlet of the steam drum is connected with a gas inlet of the superheater, and a gas outlet of the superheater is connected with a gas inlet of the gas recovery storage tank.

Preferably, a venturi tube used for increasing the steam speed is further arranged between the two-stage dust falling device and the first energy releasing chamber, an air inlet of the venturi tube is connected with an air outlet of the two-stage dust falling device, and an air outlet of the venturi tube is connected with an air inlet of the first energy releasing chamber.

Preferably, a second valve is arranged between the discharge hole of the second energy release chamber and the feed inlet of the solid recovery storage tank, and a third valve is arranged between the gas outlet of the second energy release chamber and the gas inlet of the pulse separator.

Preferably, at least one steam humidifying spray head is arranged on each of the first energy release chamber and the second energy release chamber, and an observation window is arranged on the second energy release chamber. The steam humidity sent by the Venturi tube is adjusted by the water mist (circulating water of 50-85 ℃ in industrial production) sprayed in the steam humidifying spray head in the first energy release chamber, so that the water in the steam is more fully saturated and is vertically and quickly contacted with the calcium oxide fed in a dosing manner, the calcium oxide quickly absorbs the water brought by the steam to generate water-containing calcium oxide and calcium hydroxide for releasing energy, and the water mist (circulating water of 50-85 ℃ in industrial production) sprayed in the steam humidifying spray head in the second energy release chamber is adjusted according to the requirements of the amount of the fed calcium oxide and the water content in the steam, so that the amount of supplemented atomized water is balanced with the amount of the calcium oxide, the complete energy release of the calcium oxide is ensured, and the temperature and the humidity of the steam are improved.

Preferably, the temperature and humidity raising and reducing chamber, the first energy releasing chamber and the second energy releasing chamber are all provided with temperature and humidity pressure detectors.

The utility model discloses a steam recovery unit's application method as follows:

s1, conveying high-humidity low-temperature waste steam into a waste steam pretreatment mechanism through a pipeline, and obtaining steam subjected to temperature raising, humidity reducing and dust settling through the waste steam pretreatment mechanism;

s2, introducing the steam obtained in the step S1 into a calcium oxide energy-releasing purification mechanism, and performing calcium oxide energy-releasing reaction and purification to obtain a calcium hydroxide powder and high-temperature purification steam wrapped with the calcium hydroxide powder;

and S3, introducing the calcium hydroxide powder obtained in the step S2 and the high-temperature purified steam wrapped with the calcium hydroxide powder into a separation and recovery mechanism for separation and recovery.

Compared with the prior art, the utility model has the advantages of as follows:

firstly, the utility model utilizes low-temperature high-humidity waste steam discharged from iron and steel enterprises in iron making, steel making, nonferrous industry, chemical industry, papermaking, power plants, sugar making, biological pharmacy and other industrial production as a reaction medium and a heat exchange medium to carry out energy release reaction with calcium oxide, release energy and remove pollutants in waste gas;

secondly, the utility model can not only thoroughly solve the direct emission of low-temperature waste gas and waste of low-temperature energy and water resource, but also eliminate the pollution problem of particulate matters and sulfides to the environment, and simultaneously can also solve the comprehensive production problems of white visual pollution and the like;

thirdly, the utility model provides a current process equipment release the heat that can produce to calcium oxide and can not accomplish to recycle and cause the heat energy waste, realized the high-efficient utilization of low temperature exhaust steam resource, realized "zero release" of industrial production process, release the calcium hydroxide that can change the production moreover, can directly regard as industrial production such as additive, sintering batching to use.

Drawings

Fig. 1 is a schematic structural view of a vapor recovery device in embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a vapor recovery device in embodiment 2 of the present invention;

fig. 3 is a schematic structural view of a vapor recovery device according to embodiment 3 of the present invention;

fig. 4 is a schematic structural view of a vapor recovery device in embodiment 4 of the present invention.

In the figure:

the system comprises a waste steam pretreatment mechanism 1, a calcium oxide energy releasing and purifying mechanism 2, a separation and recovery mechanism 3, a temperature raising and humidity reducing chamber 11, a first calcium oxide feeding bin 12, a two-stage dust settling device 13, a first energy releasing chamber 21, a second calcium oxide feeding bin 22, an additive feeding bin 23, a first spiral feeder 24, a first stirring and stirring machine 25, a first motor 26, a second energy releasing chamber 31, a second spiral feeder 32, a second stirring and stirring machine 33, a first valve 34, a second motor 35, a gas recovery storage tank 41, a solid recovery storage tank 42, a pneumatic conveyor 43, a pulse separator 51, a fan 52, a steam drum 53, a superheater 54, a second valve 55, a third valve 56, a solid powder box 57, a fourth valve 58, a venturi tube 6, a steam humidifying sprayer 71, a roller 72, an observation window 81 and a temperature and humidity pressure detector 91.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Example 1

As shown in fig. 1, a steam recovery device comprises a waste steam pretreatment mechanism 1, a calcium oxide energy release purification mechanism 2 and a separation recovery mechanism 3:

waste steam pretreatment mechanism 1: the device is used for heating, dehumidifying and dedusting high-humidity low-temperature waste steam, and comprises a heating and dehumidifying chamber 11, a first calcium oxide feeding bin 12 and a two-stage deduster 13, wherein an air inlet of the heating and dehumidifying chamber 11 is connected with a high-humidity low-temperature waste steam conveying pipe, an air outlet of the heating and dehumidifying chamber 11 is connected with an air inlet of the two-stage deduster 13, an air outlet of the two-stage deduster 13 is connected with an air inlet of a calcium oxide energy-releasing and purifying mechanism 2, a feeding hole is formed in the upper end of the heating and dehumidifying chamber 11, and the feeding hole is connected with a discharging hole of the first calcium oxide feeding bin 12;

calcium oxide energy release purification mechanism 2: the high-temperature purification steam is obtained after pretreated waste steam is subjected to calcium oxide energy release and purification and comprises a primary calcium oxide energy release purification structure and a secondary calcium oxide energy release structure, the primary calcium oxide energy release purification structure comprises a first energy release chamber 21, a second calcium oxide feeding chamber 22, an additive feeding chamber 23, a first spiral feeder 24 and a first material turning stirrer 25, an air inlet of the first energy release chamber 21 is connected with an air outlet of the two-stage dust remover 13, a calcium oxide feeding port and an additive feeding port are formed in the first energy release chamber 21, the calcium oxide feeding port is connected with a discharging port of the second calcium oxide feeding chamber 22, the additive feeding port is connected with a discharging port of the additive feeding chamber 23, a discharging port of the first energy release chamber 21 is connected with the secondary calcium oxide energy release structure through a first valve 34, the first spiral feeder 24 and the first material turning stirrer 25 are fixedly arranged in the first energy release chamber 21, and a first motor 26 for driving the first spiral feeder 24 and the first material turning stirrer 25 to move simultaneously is arranged on the first energy release chamber 21;

the secondary calcium oxide energy release structure comprises a second energy release chamber 31, and a second spiral feeder 32 and a second material turning stirrer 33 which are fixedly arranged in the second energy release chamber 31, the second energy release chamber 31 is connected with the separation and recovery mechanism 3, a feed inlet of the second energy release chamber 31 is connected with a discharge outlet of the first energy release chamber 21 through a first valve 34, and a second motor 35 for driving the second spiral feeder 32 and the second material turning stirrer 33 to move simultaneously is arranged on the second energy release chamber 31;

separation and recovery mechanism 3: the device is used for recovering calcium hydroxide powder obtained after the calcium oxide energy-releasing purification mechanism 2, and separating and recovering high-temperature purification steam which is obtained by the calcium oxide energy-releasing purification mechanism 2 and is wrapped with the calcium hydroxide powder, the separation and recovery mechanism 3 comprises a gas recovery storage tank 41, a solid recovery storage tank 42 and a separation structure, a gas inlet of the gas recovery storage tank 41 is connected with a gas outlet of the separation structure, a feed inlet of the solid recovery storage tank 42 is respectively connected with a discharge outlet of the separation structure and a discharge outlet of the second energy-releasing chamber 31, and pneumatic conveyors 43 are arranged on pipelines which are connected with the feed inlet of the solid recovery storage tank 42, the discharge outlet of the separation structure and the discharge outlet of the second energy-releasing chamber 31.

The separation structure comprises a pulse separator 51, a fan 52, a steam drum 53 and a superheater 54, wherein a gas outlet of the second energy release chamber 31 is communicated with a gas inlet of the pulse separator 51 through a heat insulation pipeline, a gas outlet of the pulse separator 51 is connected with a gas inlet of the solid recovery storage tank 42, a gas outlet of the pulse separator 51 is connected with a gas inlet of the fan 52, a gas outlet of the fan 52 is connected with a gas inlet of the steam drum 53, a gas outlet of the steam drum 53 is connected with a gas inlet of the superheater 54, a gas outlet of the superheater 54 is connected with a gas inlet of the gas recovery storage tank 41, a second valve 55 is arranged between a gas outlet of the second energy release chamber 31 and a gas inlet of the solid recovery storage tank 42, and a third valve 56 is arranged between a gas outlet of the second energy release chamber 31 and a gas inlet of the pulse separator 51.

The use method of the steam recovery device comprises the following steps:

s1, when high-humidity low-temperature waste steam is conveyed to a temperature-raising and humidity-reducing chamber 11 through a pipeline, calcium oxide powder is sprayed into the temperature-raising and humidity-reducing chamber 11 through a first calcium oxide feeding bin 12, partial water in the waste steam is absorbed by calcium oxide to react and release energy, the steam humidity is reduced, the steam temperature is increased, dry dust-settling purification is carried out through a two-stage dust-settling device 13, collected dust enters a dust-collecting bin body of the two-stage dust-settling device 13, the dust-settling efficiency reaches over 99%, and relatively clean steam required by a calcium oxide energy-releasing mechanism is provided;

s2, the steam obtained in the S1 passes through a Venturi tube 6,the steam is accelerated through the Venturi tube 6, then the accelerated steam is introduced into the first energy release chamber 21, calcium oxide powder is sprayed into the first energy release chamber 21 through the second calcium oxide feeding bin 22, the introduced steam is atomized and humidified through the steam humidifying spray head 71 to reach a saturated state according to CaO + H ₂ O→Ca(OH) ₂ Steam introduced into the first energy release chamber 21 and calcium oxide powder perform water and reaction, the calcium oxide powder absorbs moisture in the steam and supplements atomized warm water to release energy, the first motor 26 drives the first screw feeder 24 to horizontally feed the materials, meanwhile, the first motor 26 drives the first material turning stirrer 25 to enable the calcium oxide materials to be synchronously and longitudinally thrown and rolled in the forward conveying process, the calcium oxide materials are fully contacted with the moisture in the steam and synchronously advance to perform rapid fusion reaction, in the first energy release reaction process, the calcium oxide rapidly absorbs the moisture to reduce the moisture content in the steam, the moisture content of the calcium oxide and the low-temperature steam is calculated through balance, the calcium oxide and the low-temperature steam are sprayed into circulating water of 50-85 ℃ in the industrial production through a steam humidifying nozzle 71 to improve the moisture content of the steam, the steam is controlled within the range of saturated steam, the calcium oxide and the calcium hydroxide produced by reaction are sprayed into the first screw feeder 24 and the first material turning stirrer 25 to a discharge port of the first energy release chamber 21 to wait, when the first valve 34 is in a closed state, the material cannot enter the second energy release chamber 31, the steam and the pressure and the steam additive are temporarily stored, the steam and the additive is simultaneously converted into the steam and the steam additive to realize the purification of the steam, and the purification of the additive, and the purification of the harmful substances in the steam chamber 23;

in the utility model, because the first valve 34 is arranged, the energy releasing time of calcium oxide in the first-level calcium oxide energy releasing purification structure can be delayed, and the lime can be prevented from being pushed forward, so that the lime can obtain sufficient energy releasing, along with the increase of the internal pressure of the first-level calcium oxide energy releasing purification structure, when the pressure in the first-level calcium oxide energy releasing purification structure is close to the pressure of the venturi tube 6, the first valve 34 is opened, along with the opening rotation of the first valve 34, the materials and the steam which are temporarily stored in the first energy releasing chamber 21 are continuously pushed forward by the pressure of the gravity and the pressure of the steam, and then enter the second energy releasing chamber 31;

s3, calcium oxide and calcium hydroxide entering the second energy release chamber 31 are fully mixed and stirred with steam, so that scaling and blockage of the inner wall of an energy release mechanism can be avoided, the energy release efficiency can be improved, the second spiral feeder 32 and the second material turning stirrer 33 are arranged in the second energy release chamber 31, materials are longitudinally thrown up in the forward moving process and are fully contacted with water vapor and synchronously move forward, the energy release reaction efficiency of the steam and the calcium oxide is further improved, positive pressure is kept in the energy release process of the second energy release chamber 31, a second motor 35 is driven through variable frequency speed regulation to adjust the staying time of the materials in the second energy release chamber 31, the steam pressure and temperature are controlled, due to the arrangement of the second valve 55 and the third valve 56, the energy release time of the calcium oxide in the second energy release chamber 31 can be delayed, lime can be prevented from being pushed forward, sufficient energy can be obtained, the humidifying temperature of the second energy release chamber 31 can be adjusted according to the terminal temperature of the steam, the humidifying temperature of the second energy release chamber can be adjusted to be controlled below 200 ℃, the spraying temperature of the humidifying water spray head can be controlled, the spraying temperature of the spraying device can be controlled, and the spraying temperature of the humidifying water can be controlled to be less than the temperature of the spraying device 71, and the humidifying temperature of the whole steam spraying device can be controlled, and the spraying temperature of the humidifying temperature can be controlled, and the spraying device can be controlled;

s4, when the first valve 34 in the first energy release chamber 21 is opened and the temperature and the pressure in the second energy release chamber 31 reach set values, the third steam valve 56 is opened first, so that the steam in the second energy release chamber 31 enters the pulse separator 51 through a pipeline to collect steam and hydroxide powder, then the second valve 55 is opened, the material temporarily stored in the second energy release chamber 31 is continuously pushed forward by gravity along with the opening and rotation of the second valve 55 and enters the pneumatic conveyor 43, and when the temperature pressure in the second energy release chamber 31 is reduced to a preset value, the third valve 56 is closed first, and then the second valve 55 is closed;

s5, after the third valve 56 is opened, high-temperature steam mixed with calcium hydroxide enters the pulse separator 51 through a heat preservation pipeline, the calcium hydroxide enters the solid recovery storage tank 42 through the pneumatic conveyor 43 after being separated, the pulse separator 51 works discontinuously, the fan 52 can be set with variable frequency speed regulation, the high-frequency operation is carried out during steam recovery, the low-frequency operation is carried out during waiting, the high-temperature steam enters the steam drum 53 through the fan 52, the high-temperature steam enters the gas recovery storage tank 41 after being regulated by the heat exchanger 54, and the steam temperature is further improved because the whole energy release process is subjected to dry energy release digestion by depending on the water content in the steam without redundant liquid water, so that dry calcium hydroxide and high-temperature steam are directly obtained after separation.

Example 2

Another embodiment of a steam recycling apparatus is provided in this embodiment, as shown in fig. 2, the waste steam pretreatment mechanism 1 in embodiment 2 is the same as that in embodiment 1, and is not shown in the drawings, and differs from embodiment 1 in that the calcium oxide energy-releasing and purifying mechanism 2 in this embodiment includes a first calcium oxide energy-releasing and purifying structure and a drum 72, the first calcium oxide energy-releasing and purifying structure includes a first energy-releasing chamber 21, a second calcium oxide feeding bin 22, a first spiral feeder 24 and a first material-turning mixer 25, an air inlet of the first energy-releasing chamber 21 is connected to an air outlet of the two-stage dust-falling device 13, a calcium oxide inlet is provided on the first energy-releasing chamber 21, the calcium oxide inlet is connected to an outlet of the second calcium oxide feeding bin 22, a first valve 34 is connected between an outlet of the first energy-releasing chamber 21 and an inlet of the drum 72, both the first spiral feeder 24 and the first material-turning mixer 25 are fixedly disposed in the first energy-releasing chamber 21, and the first energy-releasing chamber 21 is provided with a first motor 26 for driving the first spiral feeder 24 and the first material-turning mixer 25 to move simultaneously;

separation and recovery mechanism 3: the separation and recovery mechanism 3 comprises a gas recovery storage tank 41, a solid recovery storage tank 42 and a separation structure, wherein a gas inlet of the gas recovery storage tank 41 is connected with a gas outlet of the separation structure, a feed inlet of the solid recovery storage tank 42 is respectively connected with a discharge outlet of the separation structure and a discharge outlet of the roller 72, and pneumatic conveyors 43 are arranged on pipelines connecting the feed inlet of the solid recovery storage tank 42 with the discharge outlet of the separation structure and the discharge outlet of the roller 72;

the separation structure comprises a pulse separator 51, a fan 52, a steam drum 53 and a superheater 54, wherein an air outlet of a roller 72 is communicated with an air inlet of the pulse separator 51 through a heat insulation pipeline, an air outlet of the pulse separator 51 is connected with an air inlet of a solid recovery storage tank 42, an air outlet of the pulse separator 51 is connected with an air inlet of the fan 52, an air outlet of the fan 52 is connected with an air inlet of the steam drum 53, an air outlet of the steam drum 53 is connected with an air inlet of the superheater 54, an air outlet of the superheater 54 is connected with an air inlet of a gas recovery storage tank 41, a second valve 55 is arranged between an air outlet of the roller 72 and an air inlet of the solid recovery storage tank 42, a third valve 56 is arranged between an air outlet of the roller 72 and an air inlet of the pulse separator 51, and the rest are the same as in embodiment 1, and are omitted.

Example 3

As shown in fig. 3, the waste steam pretreatment mechanism 1 and the calcium oxide energy-releasing purification mechanism 2 in the embodiment 3 are the same as those in the embodiment 1, except that the separation and recovery mechanism 3 in the embodiment 3 includes a pulse separator 51, a fan 52, a steam drum 53 and a superheater 54, a discharge port of the second energy-releasing chamber 31 is communicated with a feed port of the pulse separator 51, a solid powder box 57 for collecting solid powder is disposed at the bottom of the pulse separator 51, an air outlet of the pulse separator 51 is connected with an air inlet of the fan 52, an air outlet of the fan 52 is connected with an air inlet of the steam drum 53, an air outlet of the steam drum 53 is connected with an air inlet of the superheater 54, an air outlet of the superheater 54 is connected with an air inlet of the gas recovery storage tank 41, a second valve 55 is disposed between the discharge port of the second energy-releasing chamber 31 and the feed port of the pulse separator 51, and the rest is the same as that in the embodiment 1.

Example 4

As shown in fig. 4, the exhaust steam pretreatment mechanism 1, the calcium oxide energy-releasing purification mechanism 2, and the separation and recovery mechanism 3 in example 4 are the same as those in example 3, except that a roller 72 is further disposed between the separation and recovery mechanism 3 and the calcium oxide energy-releasing purification mechanism 2 in example 3, the separation and recovery mechanism 3 further includes a solid recovery storage tank 42, a feed inlet of the roller 72 is connected to a discharge outlet of the second energy-releasing chamber 31 through a second valve 55, a gas outlet of the roller 72 is connected to a gas inlet of the pulse separator 51 through a third valve 56, a discharge outlet of the roller 72 is connected to the pneumatic conveyor 43 through a fourth valve 58, a discharge outlet of the pneumatic conveyor 43 and a discharge outlet of the pulse separator 51 are connected to feed inlets of the solid recovery storage tank 42, and the rest are the same as those in example 3, and will not be described herein again.

The utility model discloses in embodiment 1-embodiment 4, still can be provided with the venturi 6 that is used for promoting steam velocity between processing mechanism 1 and the calcium oxide energy release purification mechanism 2 before the exhaust steam, venturi 6's air inlet links to each other with the gas outlet of two-stage dust fall ware 13, and venturi 6's gas outlet links to each other with the air inlet of first energy release room 21.

In embodiments 1 to 4 of the present invention, at least one steam humidification nozzle 71 may be further disposed on both the first energy release chamber 21 and the second energy release chamber 31.

In embodiments 1 to 4 of the present invention, an observation window 81 may be further provided in the second energy release chamber 31.

In the embodiments 1 to 4 of the present invention, the temperature and humidity pressure detector 91 may be further disposed on the temperature raising and humidity reducing chamber 11, the first energy releasing chamber 21, the second energy releasing chamber 31, and the roller 72.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims

1. A vapor recovery device is characterized by comprising,

exhaust steam pretreatment mechanism (1): the waste steam pre-treatment mechanism (1) is used for raising the temperature, reducing the humidity and reducing the dust of high-humidity low-temperature waste steam, and an air inlet of the waste steam pre-treatment mechanism (1) is connected with a high-humidity low-temperature waste steam conveying pipe;

calcium oxide energy release purification mechanism (2): the device is used for obtaining high-temperature purified steam after the pretreated waste steam is subjected to calcium oxide energy release and purification, and an air inlet of the calcium oxide energy release purification mechanism (2) is connected with an air outlet of the waste steam pretreatment mechanism (1);

separation and recovery mechanism (3): the device is used for separating and recovering calcium hydroxide powder obtained after the calcium oxide energy-releasing purification mechanism (2) releases energy and purifies, separating and recovering high-temperature purification steam which is obtained by the calcium oxide energy-releasing purification mechanism (2) and wraps the calcium hydroxide powder, and the separation and recovery mechanism (3) is connected with the calcium oxide energy-releasing purification mechanism (2).

2. The steam recovery device according to claim 1, wherein the waste steam pretreatment mechanism (1) comprises a temperature-raising and humidity-reducing chamber (11), a first calcium oxide feeding bin (12) and a two-stage dust-settling device (13), an air inlet of the temperature-raising and humidity-reducing chamber (11) is connected with a high-humidity low-temperature waste steam conveying pipe, an air outlet of the temperature-raising and humidity-reducing chamber (11) is connected with an air inlet of the two-stage dust-settling device (13), an air outlet of the two-stage dust-settling device (13) is connected with an air inlet of the calcium oxide energy-releasing and purifying mechanism (2), an upper end of the temperature-raising and humidity-reducing chamber (11) is provided with a feeding hole, and the feeding hole is connected with a discharging hole of the first calcium oxide feeding bin (12).

3. The steam recycling device according to claim 2, wherein the calcium oxide energy-releasing purification mechanism (2) comprises a primary calcium oxide energy-releasing purification structure and a secondary calcium oxide energy-releasing structure, the primary calcium oxide energy-releasing purification structure comprises a first energy-releasing chamber (21), a second calcium dioxide feeding bin (22), an additive feeding bin (23), a first spiral feeder (24) and a first material-turning stirrer (25), an air inlet of the first energy-releasing chamber (21) is connected with an air outlet of the two-stage dust falling device (13), a calcium oxide feeding port and an additive feeding port are arranged on the first energy-releasing chamber (21), the calcium oxide feeding port is connected with a discharging port of the second calcium dioxide feeding bin (22), the additive feeding port is connected with a discharging port of the additive feeding bin (23), a discharging port of the first energy-releasing chamber (21) is connected with the secondary calcium oxide energy-releasing structure through a first valve (34), the first spiral feeder (24) and the first material-turning stirrer (25) are fixedly arranged in the first spiral feeder (21), and a first spiral feeder (24) and a first stirring motor (26) is arranged on the first spiral feeder (21) for driving the first material-turning stirrer (25) to move.

4. The steam recovery device according to claim 3, wherein the secondary calcium oxide energy release structure comprises a second energy release chamber (31), and a second screw feeder (32) and a second material turning and stirring machine (33) which are fixedly arranged in the second energy release chamber (31), the second energy release chamber (31) is connected with the separation and recovery mechanism (3), the feeding port of the second energy release chamber (31) is connected with the discharging port of the first energy release chamber (21) through the first valve (34), and a second motor (35) for driving the second screw feeder (32) and the second material turning and stirring machine (33) to move simultaneously is arranged on the second energy release chamber (31).

5. The vapor recovery device according to claim 4, wherein the separation and recovery mechanism (3) comprises a gas recovery storage tank (41), a solid recovery storage tank (42) and a separation mechanism, a gas inlet of the gas recovery storage tank (41) is connected with a gas outlet of the separation mechanism, a feed inlet of the solid recovery storage tank (42) is respectively connected with a discharge outlet of the separation mechanism and a discharge outlet of the second energy release chamber (31), and pipelines connecting the feed inlet of the solid recovery storage tank (42) with the discharge outlet of the separation mechanism and the discharge outlet of the second energy release chamber (31) are respectively provided with a pneumatic conveyor (43).

6. The vapor recovery device according to claim 5, wherein the separation mechanism comprises a pulse separator (51), a fan (52), a vapor drum (53) and a superheater (54), the gas outlet of the second energy release chamber (31) is communicated with the gas inlet of the pulse separator (51) through a heat insulation pipe, the discharge outlet of the pulse separator (51) is connected with the feed inlet of the solid recovery storage tank (42), the gas outlet of the pulse separator (51) is connected with the gas inlet of the fan (52), the gas outlet of the fan (52) is connected with the gas inlet of the vapor drum (53), the gas outlet of the vapor drum (53) is connected with the gas inlet of the superheater (54), and the gas outlet of the superheater (54) is connected with the gas inlet of the gas recovery storage tank (41).

7. The steam recovery device according to claim 6, characterized in that a venturi tube (6) for increasing the steam velocity is further arranged between the two-stage dustfall device (13) and the first energy release chamber (21), the air inlet of the venturi tube (6) is connected with the air outlet of the two-stage dustfall device (13), and the air outlet of the venturi tube (6) is connected with the air inlet of the first energy release chamber (21).

8. The vapor recovery device of claim 7, wherein: a second valve (55) is arranged between the discharge hole of the second energy releasing chamber (31) and the feed inlet of the solid recovery storage tank (42), and a third valve (56) is arranged between the gas outlet of the second energy releasing chamber (31) and the gas inlet of the pulse separator (51).

9. The vapor recovery device of claim 7, wherein: at least one steam humidifying spray head (71) is arranged on each of the first energy release chamber (21) and the second energy release chamber (31), and an observation window (81) is arranged on the second energy release chamber (31).

10. The vapor recovery device of claim 7, wherein: temperature and humidity pressure detectors (91) are arranged on the temperature-raising and humidity-reducing chamber (11), the first energy release chamber (21) and the second energy release chamber (31).