CN210340646U

CN210340646U - Flash tank

Info

Publication number: CN210340646U
Application number: CN201921176832.3U
Authority: CN
Inventors: 宋岱峰
Original assignee: Sichuan Meifote Eco-Technology Co Ltd
Current assignee: Sichuan Meiyuan Huanneng Technology Co ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-04-17
Anticipated expiration: 2029-07-25

Abstract

The utility model provides a pair of flash tank, including the buffer with be located the flash distillation district of buffer top, be provided with adsorption equipment in the buffer, adsorption equipment is arranged in adsorbing the heavy metal in the processing object in the flash tank. So, through setting up adsorption equipment at the buffer, the process of processing object flash distillation in the flash tank is because the reduction of pressure, and the liquid in the processing object can gasify rapidly, and the steam of rapid gasification forms to the processing object and stirs, has guaranteed processing object and adsorption equipment's abundant contact, and adsorption equipment fully adsorbs the heavy metal in to the processing object, has effectively removed the heavy metal in the processing object, has avoided the heavy metal to cause secondary pollution's the condition to take place to the environment.

Description

Flash tank

Technical Field

The utility model relates to a sludge treatment technical field, concretely relates to flash tank.

Background

With the continuous acceleration of the urbanization process of China and the comprehensive coverage of urban and rural sewage treatment facilities, the annual total output of municipal sludge is continuously increased, and the annual output of the municipal sludge in China can reach 6000 to 9000 ten thousand tons by 2020. At present, the construction of sewage treatment plants in China has a serious phenomenon of 'heavy water and light sludge', namely sewage is treated in an important way, but the sludge treatment rate is low; the national sludge treatment rate in 2016 is only 33%, most sludge treatment processes in sewage treatment plants still stay in the traditional modulation dehydration mode, the stabilization treatment of the sludge is difficult to realize, and the sludge which is not subjected to the stabilization treatment contains perishable organic matters, malodorous substances, pathogens, heavy metals and the like, so that the secondary pollution to the environment is easily caused.

Aiming at the problem that unstabilized sludge is easy to cause secondary pollution, the following treatment methods are mainly adopted in the related art for sludge: 1) sanitary landfill, 2) aerobic composting, 3) anaerobic consumption, 4) sludge incineration, 5) land utilization and other treatment modes.

Although these treatment methods can solve the secondary pollution problem of the sludge to some extent, there still exist some other problems, such as:

1) sanitary landfill: partial degradation of organic matters can be realized; but the occupied area is large, the period is long, more land needs to be added for landfill with the continuous increase of the sludge amount, the generated percolate still needs to be treated, secondary pollution is easy to generate to the environment, and the residues after landfill need to be dug out for secondary treatment according to the current environmental standard.

2) Aerobic composting: the sludge can be stabilized and pathogenic bacteria can be killed, and the investment cost is low; but a large amount of auxiliary materials are required to be added, the odor problem exists, the period is long, the occupied area is large, the biomass in the sludge is not reasonably utilized, and the product quality is low.

3) Anaerobic digestion: the organic matter degradation rate is high (40-60%), the sludge volume can be obviously reduced, pathogenic bacteria can be killed in a high-temperature environment, the sludge is harmless, aerobic composting is realized without ventilation, energy consumption is saved, and meanwhile, biogas can be generated for energy supply; but the method has the advantages of more equipment, complex process, large early investment, large environmental influence on the system, instability and poor sustainability.

4) Sludge incineration: the reduction and harmlessness of the sludge can be effectively realized; the investment and operation cost is high, organic matters are not effectively utilized, fly ash generated by incineration belongs to hazardous waste, other tail gas needs to be treated, and residues after incineration still need to be buried; the method can realize resource utilization when the method is used for incineration power generation, but has high investment cost, unstable capacity, no sustainability for profit and needs national capital support.

5) Land utilization: the method is another main treatment mode of sludge in China, fully utilizes organic matters of the sludge, and is used as a crop and pasture fertilizer, nutrient soil for forest land and garden greening, a sandy wasteland, a saline-alkali land and a waste mining area matrix soil conditioner after treatment. However, the safety of land utilization of sludge is questioned because sludge contains a small amount of heavy metals and persistent pollutants.

6) And others: because of recycling direction, the way of making bricks and haydite from sludge is also implemented, but because the content of organic matter in sludge is higher, the mechanical strength of the finished product is poor.

Disclosure of Invention

The utility model provides a flash tank to after solving among the correlation technique to sludge treatment, the heavy metal in the mud causes secondary pollution's problem to the environment easily.

In order to achieve the above object, the utility model provides a flash tank, include the buffer and be located the flash distillation district of buffer top, be provided with adsorption equipment in the buffer, adsorption equipment is used for adsorbing heavy metal in the processing object in the flash tank.

The utility model discloses an in the optional mode, adsorption equipment includes the activated carbon adsorption device, the activated carbon adsorption device with the flash tank sets up with the axle center, adsorption equipment's lateral wall with the connection can be dismantled to the inside wall of flash tank.

In an optional aspect of the present invention, the activated carbon adsorption device includes at least one activated carbon sponge rod, and the activated carbon sponge rod is located along the axis direction of the flash tank.

The utility model discloses an in the optional mode, activated carbon adsorption device still includes the fixed mounting dish, a plurality of fixed mounting holes have in the quotation of fixed mounting dish, the activated carbon sponge stick passes through a plurality of fixed mounting holes are installed on the fixed mounting dish, the fixed mounting dish with the connection can be dismantled to the inside wall of flash tank.

The utility model discloses an optional mode, the fixed mounting dish includes first sub fixed mounting dish and the sub fixed mounting dish of second, first sub fixed mounting dish is located the top of the sub fixed mounting dish of second, the active carbon sponge stick is located first sub fixed mounting dish with between the sub fixed mounting dish of second.

The utility model discloses an optional mode, the diameter of first sub fixed mounting dish is greater than the diameter of the sub fixed mounting dish of second, just the diameter less than or equal to of first sub fixed mounting dish the internal diameter of flash tank.

In an optional aspect of the present invention, a plurality of gaps are provided between the activated carbon sponge rods, and the gaps are used for passing through the treatment object in the flash tank.

The utility model discloses an in the optional mode, the flash distillation district is connected with first conveyor, first conveyor be used for with the processing object after the front end equipment of flash tank is handled carries extremely in the flash tank.

The utility model discloses an in the optional mode, the top in flash distillation district is connected with the steam backflow pipeline, the steam backflow pipeline is connected with heating device, the steam backflow pipeline be used for with flash distillation steam in the flash tank flows back extremely heating device.

The utility model discloses an in the optional mode, the bottom of buffer is connected with second conveyor, second conveyor be used for with processing object after the flash distillation in the flash tank carries extremely the rear end equipment of flash tank.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a flash tank provided by the present invention;

fig. 2 is a schematic perspective view of an adsorption device in the flash tank provided by the present invention;

fig. 3 is a top view of an adsorption device in the flash tank provided by the present invention;

fig. 4 is a schematic view of an application scene structure of the flash tank provided by the present invention;

description of reference numerals:

10-a flash tank;

101-a buffer;

102-a flash zone;

103-an adsorption device;

1031-activated carbon sponge bar;

1032-a fixed mounting plate;

1032 a-first sub-fixed mounting plate;

1032 b-a second sub-stationary mounting plate;

20-a first conveying device;

30-a steam return line;

40-a second conveyor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be understood that the terms "inner", "outer", "upper", "bottom", "front", "rear", and the like, when used in the orientation or positional relationship indicated in the drawings, are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Fig. 1 is a schematic structural diagram of a flash tank provided by the present invention; fig. 2 is a schematic perspective view of an adsorption device in the flash tank provided by the present invention; fig. 3 is a top view of an adsorption device in the flash tank provided by the present invention; fig. 4 is an application scene structure diagram of the flash tank provided by the present invention.

Referring to fig. 1 to 4, an embodiment of the present invention provides a flash tank 10, including a buffer area 101 and a flash evaporation area 102 located above the buffer area 101, an adsorption device 103 is provided in the buffer area 101, and the adsorption device 103 is used for adsorbing heavy metals in a processing object in the flash tank 10.

Specifically, in some embodiments, the treatment object in the flash tank 10 may be municipal sludge subjected to pretreatment, and the pretreatment may be hydrolysis wall breaking treatment for perishable organic matters and microorganisms in the municipal sludge, such as dehydration treatment and hydrolysis treatment. This is not limited in the present embodiment. It should be understood that the municipal sludge in the present embodiment is only an example, and those skilled in the art will understand that the flash tank 10 provided by the present invention can also treat, for example, industrial sludge, sludge in villages and towns, and the like, and this is not particularly limited in the present embodiment.

In the related art, municipal sludge which is not subjected to stabilization treatment is treated in the modes of sanitary landfill, aerobic composting, anaerobic consumption, sludge incineration, land utilization and the like, so that secondary pollution to the environment caused by perishable organic matters, malodorous substances, pathogens and the like contained in the sludge is avoided. Although the treatment modes can avoid the secondary pollution of the municipal sludge to the environment to a certain extent, the influence of the heavy metals contained in the municipal sludge to the environment is not fully considered, and the heavy metals contained in the municipal sludge still cause the secondary pollution to the environment.

The embodiment of the utility model provides an in, buffer 101 at 10 in the flash tank sets up adsorption equipment 103, when handling municipal sludge, in municipal sludge after the high temperature hydrolysis enters into flash tank 10, because the pressure reduction in flash tank 10, the moisture that is contained in the municipal sludge can gasify rapidly, and the steam of rapid gasification arouses the violent boiling of municipal sludge to incessantly stir the municipal sludge in flash tank 10, guarantee municipal sludge and adsorption equipment 103's abundant contact in flash tank 10. Thereby, adsorption equipment 103 can fully adsorb the heavy metal in the municipal sludge to get rid of the heavy metal in the municipal sludge, avoided the heavy metal that contains in the municipal sludge to cause secondary pollution to the environment, improved municipal sludge utilization ratio.

In some optional embodiments, the adsorption device 103 comprises an activated carbon adsorption device, the activated carbon adsorption device is coaxially disposed with the flash tank 10, and a side wall of the adsorption device 103 is detachably connected to an inner side wall of the flash tank 10.

Specifically, in this embodiment, the adsorption device 103 may be an activated carbon adsorption device, the activated carbon may be modified activated carbon, the surface of the activated carbon has a large number of microporous honeycomb structures and good adsorption performance on heavy metals, and the surface of the modified activated carbon has a large number of active functional groups, so that the modified activated carbon can adsorb heavy metals in a targeted manner, and the removal efficiency of heavy metals in municipal sludge is improved. Specifically, in the present embodiment, the modification of the activated carbon may be, for example, a modification method disclosed in the related art such as an amination modification, or another modification method disclosed in the related art, as long as the surface of the modified activated carbon has an active functional group capable of selectively adsorbing a heavy metal, and this is not particularly limited in the present embodiment. In the present embodiment, the activated carbon may be commercially available activated carbon, or may be activated carbon obtained by purchasing an activated carbon raw material from a commercial market and then baking the activated carbon by itself, which is not particularly limited in the present embodiment. Of course, it will be understood by those skilled in the art that the modification of the activated carbon may be different for different heavy metals, thereby having different active functional groups.

In some embodiments, the inner sidewall of the flash tank 10 may be provided with a mounting boss (not shown in the drawings), and specifically, the mounting boss may be fixedly connected with the inner sidewall of the flash tank 10; the suction device 103 may be mounted on the mounting boss and connected by a connecting member such as a bolt.

In this embodiment, the adsorption device 103 is detachably connected to the inner sidewall of the flash tank 10, so that after the adsorption device 103 is saturated by adsorption, the adsorption device 103 can be conveniently detached to replace and regenerate the adsorption device 103. Thereby ensuring the work of the whole flash tank 10 and the regeneration of the adsorption device 103 and improving the treatment efficiency of the municipal sludge.

Referring to fig. 1 and 2, in some embodiments, the activated carbon adsorption device includes at least one activated carbon sponge stick 1031, and the activated carbon sponge stick 1031 is disposed along an axial direction of the flash tank 10.

In this embodiment, set activated carbon sponge stick 1031 to the axis direction that extends along flash tank 10, at the in-process that municipal sludge moved down in flash tank 10, municipal sludge can fully contact with activated carbon sponge stick 1031 to guaranteed the abundant absorption of activated carbon sponge stick 1031 to the heavy metal in the municipal sludge, improved the absorption of heavy metal in the municipal sludge and got rid of efficiency.

Referring to fig. 2 and 3, in some embodiments, the activated carbon adsorption device further includes a fixing mounting plate 1032, the fixing mounting plate 1032 has a plurality of fixing mounting holes on a plate surface thereof, the activated carbon sponge bars 1031 are mounted on the fixing mounting plate 1032 through the plurality of fixing mounting holes, and the fixing mounting plate 1032 is detachably connected to an inner side wall of the flash tank 10.

In a specific implementation, the fixing mounting plate 1032 in this embodiment may be a porous net structure (not shown in the figure) to ensure that municipal sludge can pass through smoothly. In some alternative embodiments, the fixing mounting plate 1032 may be a mounting plate made of hard stainless steel material, so as to support the mounting and fixing of the activated carbon sponge bar 1031.

Referring to fig. 1 and 2, in some embodiments, the fixed mounting plate 1032 includes a first sub fixed mounting plate 1032a and a second sub fixed mounting plate 1032b, the first sub fixed mounting plate 1032a is located above the second sub fixed mounting plate 1032b, and the activated carbon sponge bar 1031 is located between the first and second sub fixed mounting

plates

1032a and 1032 b.

In this embodiment, by disposing the activated carbon sponge bar 1031 between the first sub-fixing mounting plate 1032a and the second sub-fixing mounting plate 1032b, when the adsorption device 103 is replaced, the whole adsorption device 103 can be conveniently replaced together, the replacement efficiency of the adsorption device 103 is improved, and the treatment efficiency of the municipal sludge is further improved.

In some embodiments, the diameter of the first sub stationary mounting plate 1032a is greater than the diameter of the second sub stationary mounting plate 1032b, and the diameter of the first sub stationary mounting plate 1032a is equal to or less than the inner diameter of the flash tank 10.

Further, in some embodiments, the plurality of activated carbon sponge bars 1031 have gaps therebetween for passage of the processing objects within the flash tank 10.

Referring to fig. 4, in some embodiments, a first transfer device 20 is connected to the flash zone 102, and the first transfer device 20 is used for transferring the processing object processed by the front-end equipment of the flash tank 10 to the flash tank 10.

Specifically, in the present embodiment, the first transfer device 20 may be a transfer device such as a screw pump or a screw stacker, and the front-end treatment device of the flash tank 10 may be a device for pretreating municipal sludge such as a preheating tank or a hydrolysis reactor. In some embodiments, the treatment object can be preheated and heated to 50-110 ℃ through the preheating box, and the hydrolytic agent is added into the preheating box and uniformly mixed, and when the first conveying device 20 conveys the treatment object, the screw pump or the screw overlapping machine further stirs the municipal sludge, so that the hydrolytic agent can be sufficiently and uniformly mixed with the municipal sludge. In a hydrolysis reaction kettle, the municipal sludge is further heated to 120-150 ℃, and a hydrolytic agent fully reacts with microorganisms such as zoogloea and bacteria in the municipal sludge, so that the zoogloea in the sludge is scattered and the cell walls of the bacteria are broken. Improves the treatment of the microorganisms in the municipal sludge.

Referring to fig. 4, in some embodiments, a vapor return line 30 is connected to the top of the flash zone 102, the vapor return line 30 being connected to a heating device, the vapor return line 30 being used to return flash vapor within the flash tank 10 to the heating device.

In the embodiment, the temperature of the material after flash evaporation is reduced to 40-80 ℃, steam generated in the flash evaporation process has certain waste heat, and the steam flows back to the heating device through the backflow pipeline, so that the energy utilization rate is improved, and the working condition of subsequent equipment is ensured. Specifically, in this embodiment, the heating device may be a heating boiler, and the heating boiler heats the device to be heated by superheated steam.

Referring to fig. 4, in some embodiments, a second transfer device 40 is connected to the bottom of the buffer zone 101, and the second transfer device 40 is used for transferring the processing object flashed in the flash tank 10 to the rear end equipment of the flash tank 10.

Specifically, in the present embodiment, the second transfer device 40 may be a transfer device such as a screw pump or a screw stacker, and the rear end device of the flash tank 10 may be a device such as a mud-water separation device. The sludge-water separation device is used for separating sludge and water from the municipal sludge subjected to flash evaporation treatment by the flash evaporation tank 10, so that the resource utilization of the sludge can be realized, the economic benefit of the municipal sludge is improved, and the secondary pollution of the sludge to the environment is avoided.

The embodiment of the utility model provides an in, buffer 101 at 10 in the flash tank sets up adsorption equipment 103, when handling municipal sludge, in municipal sludge after the high temperature hydrolysis enters into flash tank 10, because the pressure reduction in flash tank 10, the moisture that is contained in the municipal sludge can gasify rapidly, and the steam of rapid gasification arouses the violent boiling of municipal sludge to incessantly stir the municipal sludge in flash tank 10, guarantee municipal sludge and adsorption equipment 30's abundant contact in flash tank 10. Thereby, adsorption equipment 30 can fully adsorb the heavy metal in the municipal sludge to get rid of the heavy metal in the municipal sludge, avoided the heavy metal that contains in the municipal sludge to cause secondary pollution to the environment, improved municipal sludge utilization ratio.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The flash tank is characterized by comprising a buffer area and a flash area positioned above the buffer area, wherein an adsorption device is arranged in the buffer area and is used for adsorbing heavy metals in a processing object in the flash tank.

2. The flash tank of claim 1, wherein the adsorption device comprises an activated carbon adsorption device, the activated carbon adsorption device and the flash tank are coaxially arranged, and a side wall of the adsorption device is detachably connected with an inner side wall of the flash tank.

3. The flash tank of claim 2 wherein the activated carbon adsorption device comprises at least one activated carbon sponge rod disposed along an axial direction of the flash tank.

4. The flash tank of claim 3, wherein the activated carbon adsorption device further comprises a fixed mounting plate, a plurality of fixed mounting holes are formed in the plate surface of the fixed mounting plate, the activated carbon sponge rods are mounted on the fixed mounting plate through the fixed mounting holes, and the fixed mounting plate is detachably connected with the inner side wall of the flash tank.

5. The flash tank of claim 4 wherein the fixed mounting plate comprises a first sub fixed mounting plate and a second sub fixed mounting plate, the first sub fixed mounting plate is located above the second sub fixed mounting plate, and the activated carbon sponge rod is located between the first sub fixed mounting plate and the second sub fixed mounting plate.

6. The flash tank of claim 5 wherein the diameter of the first sub-stationary mounting disk is greater than the diameter of the second sub-stationary mounting disk and the diameter of the first sub-stationary mounting disk is equal to or less than the inner diameter of the flash tank.

7. The flash tank as claimed in claim 3, wherein a plurality of the activated carbon sponge rods have gaps therebetween for passing a processing object inside the flash tank.

8. The flash tank as claimed in claim 1, wherein a first transfer device is connected to the flash zone for transferring the processed object processed by the front-end equipment of the flash tank into the flash tank.

9. A flash tank as claimed in claim 1 wherein a vapour return line is connected to the top of the flash zone, the vapour return line being connected to a heating device, the vapour return line being for returning flash vapour within the flash tank to the heating device.

10. The flash tank as claimed in claim 1, wherein a second transfer device is connected to the bottom of the buffer zone, and the second transfer device is used for transferring the treated object after being flashed in the flash tank to a rear-end device of the flash tank.