CN219730760U - Sludge drying bed utilizing heat of aeration pipeline - Google Patents

Abstract

The utility model belongs to the technical field of sludge treatment, and provides a sludge drying bed utilizing heat of an aeration pipeline, which comprises the following components: the surface layer is of a cast-in-place concrete structure, and heating pipes are laid in the surface layer in a reciprocating manner; the heating air inlet pipe is communicated with one end of the heating pipe, and the other end of the heating air inlet pipe is communicated with the air inlet direction aeration pipeline; the heating air outlet pipe, heating air outlet pipe one end with the heating pipe other end intercommunication, the heating air outlet pipe other end with give vent to anger orientation aeration pipeline intercommunication. The sludge drying bed utilizes the heat emitted to the outside by the aeration pipeline in the operation process to carry out thermal drying on the sludge, realizes the reutilization of the heat, and can further dry and dehydrate the sludge without adding extra special equipment, so that the sludge drying bed has the capability of normal operation under the condition of unfavorable external climate (wet and rainy).

Description

Sludge drying bed utilizing heat of aeration pipeline

Technical Field

The utility model belongs to the technical field of sludge treatment, and particularly relates to a sludge drying bed utilizing heat of an aeration pipeline.

Background

The water content of the sludge generated in the sewage treatment process is generally high and is generally between 97 and 99.6 percent, and the sludge is huge and inconvenient for subsequent treatment and disposal, so that the sludge needs to be dehydrated before the sludge treatment or disposal.

At present, the main treatment modes of sludge dewatering are drying and mechanical dewatering. The drying can be divided into natural drying and thermal drying.

The natural drying refers to spreading and airing the sludge in a drying bed with a natural filtering layer or an artificial filtering layer, and the water in the sludge is enabled to migrate (evaporate) from inside to outside due to the difference of vapor pressure of surrounding air under the action of natural force and media (such as solar energy, wind energy and air). The method is suitable for areas with drier climate, no shortage of occupied land and allowable environmental sanitation conditions, especially for vast village and town areas. However, since the drying effect is greatly limited by natural climate conditions (rainfall, evaporation, relative density, wind speed, annual freezing period), the drying period is long, and thus it is difficult to fully play a role in a humid and rainy southern area. Although frequent mechanical agitation and tipping can be used to facilitate natural drying to shorten the cycle, the work intensity of management and maintenance is increased.

The thermodynamic drying refers to a process of using heat generated by burning fossil fuel or industrial waste heat and waste heat to make sludge lose part or most of moisture through special process and equipment, and is a large-scale and industrialized drying treatment process. The method has small occupied area, short treatment period and no restriction by external natural conditions, and can reduce the water content of the sludge to 40% or below, and the dried sludge can be incinerated. However, the realization of thermal drying requires that a sewage plant is located beside a plant with a heat source or energy source, such as a power plant, a cement plant, an anaerobic digestion plant and the like, and the existing heat source is fully utilized for drying, so that the running cost is reduced. This is also difficult to achieve for sewage plants located in rural areas far from the city. Meanwhile, an aeration pipeline of the sewage plant for the aeration process of the biological tank continuously dissipates heat to the outside in the operation process, so that a large amount of energy is wasted.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides the sludge drying field utilizing the heat of the aeration pipeline, which utilizes the heat emitted to the outside by the aeration pipeline in the operation process to carry out thermal drying on the sludge, thereby realizing the reutilization of the heat, and the sludge can be further dried and dehydrated without adding complex special equipment, so that the sludge drying field has the capability of normal operation under the condition of unfavorable external climate (moist and rainy).

In order to achieve the above purpose, the utility model adopts the following technical scheme: a sludge drying plant utilizing aeration conduit heat, comprising:

the surface layer is of a cast-in-place concrete structure, and heating pipes are laid in the surface layer in a reciprocating manner;

the heating air inlet pipe is communicated with one end of the heating pipe, and the other end of the heating air inlet pipe is communicated with the air inlet direction aeration pipeline;

the heating air outlet pipe, heating air outlet pipe one end with the heating pipe other end intercommunication, the heating air outlet pipe other end with give vent to anger orientation aeration pipeline intercommunication.

Preferably, a drainage ditch is formed in the upper surface of the storage yard, the drainage ditch is arranged on the outer side of the surface layer in a surrounding mode, the bottom in the drainage ditch is arranged in a slope mode, and a water collecting pit is formed in the lowest position of the drainage ditch.

Preferably, the inner bottom of the water collection pit is communicated with an external sewage inspection well through a drain pipe.

Preferably, the gradient of the bottom in the drainage ditch is not less than 1%.

Preferably, the device further comprises a stacking shed, wherein the stacking shed comprises pillars fixedly arranged on the storage yard and a roof fixedly arranged at the top ends of the pillars, and the roof is used for covering the whole storage yard.

Preferably, the stacking shed comprises four of the columns.

Preferably, the roof is a flat roof or a pitched roof.

Preferably, the air inlet pipe and the air outlet pipe are connected through a connecting pipe;

the heating air inlet pipe is provided with a first control valve and a second control valve positioned at the downstream of the first control valve;

the heating air outlet pipe is provided with a third control valve and a fourth control valve positioned at the downstream of the third control valve;

the connecting pipe is communicated with the heating air inlet pipe and is positioned between the first control valve and the second control valve, the connecting pipe is communicated with the heating air outlet pipe and is positioned between the third control valve and the fourth control valve, and a fifth control valve is arranged on the connecting pipe.

Preferably, the valve further comprises a first valve well, a second valve well and a third valve well, wherein the first control valve and the second control valve are arranged in the first valve well, the third control valve and the fourth control valve are arranged in the second valve well, and the fifth control valve is arranged in the third valve well.

Preferably, the water supply device further comprises a flushing water pipe communicated with the tap water pipe, and a flushing valve is arranged on the flushing water pipe.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the sludge drying bed utilizing the heat of the aeration pipeline, disclosed by the utility model, the heat emitted to the outside in the operation process of the aeration pipeline is utilized to carry out thermal drying on sludge, so that the heat is reused, and the sludge can be further dried and dehydrated without adding extra special equipment, so that the sludge drying bed has the capability of normally operating under the condition of unfavorable external climate (wet and rainy).

2. According to the sludge drying bed utilizing the heat of the aeration pipeline, provided by the utility model, the flushing water pipe is arranged, so that a drainage ditch or a surface layer can be flushed when necessary.

Drawings

Fig. 1 is a schematic top view structure of a relevant part of a storage yard of a sludge drying bed using heat of an aeration pipeline according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the structure shown at AA in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the BB in FIG. 1;

FIG. 4 is a schematic view of the air flow direction of a sludge drying bed using heat of an aeration pipe according to example 1;

fig. 5 is a schematic view of the airflow direction of a sludge drying bed using heat of an aeration pipe according to example 2.

In the drawings, the list of components represented by the various numbers is as follows:

1. a storage yard; 2. stacking sheds; 3. a column; 4. a roof; 5. a surface layer; 6. a drainage ditch; 7. a water collecting pit; 8. a drain pipe; 9. a cover plate; 10. heating the air inlet pipe; 11. heating the air outlet pipe; 12. a first valve well; 13. a second valve well; 14. a communication pipe; 15. a third valve well; 16. a flushing water pipe; 17. flushing the valve; 18. heating pipes; 121. a first control valve; 122. a second control valve; 131. a fourth control valve; 132. a third control valve; 151. and a fifth control valve.

Detailed Description

The present utility model will be described in further detail with reference to specific examples so as to more clearly understand the present utility model by those skilled in the art.

It should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined. The specific meaning of such terms in this patent will be understood by those of ordinary skill in the art as the case may be.

As shown in fig. 1 to 3, the sludge drying bed using heat of an aeration pipe provided in this embodiment includes:

the sludge drying device comprises a storage yard 1, wherein a surface layer 5 for stacking sludge to be dried is arranged in the middle of the storage yard 1, the surface layer 5 is of a cast-in-place concrete structure, and a heating pipe 18 is arranged in the surface layer 5 in a reciprocating manner;

a heating air inlet pipe 10, wherein one end of the heating air inlet pipe 10 is communicated with one end of the heating pipe 18, and the other end of the heating air inlet pipe 10 is communicated with an air inlet direction aeration pipeline;

the heating air outlet pipe 11, heating air outlet pipe 11 one end with the heating pipe 18 other end intercommunication, heating air outlet pipe 11 other end and the direction aeration pipeline intercommunication of giving vent to anger.

In this embodiment, the yard 1 is located in a sewage plant, the height of the yard 1 is greater than the height of the outdoor terrace, and the height of the yard 1 may be 0.3m. The heating air inlet pipe 10 can be an aeration pipeline led out from a factory aeration pipeline (a main pipe or a branch pipe), the pipe diameters of the heating air inlet pipe 10, the heating pipe 18 and the heating air outlet pipe 11 are the same as those of the factory aeration pipeline, and the heating air outlet pipe 11 is communicated with the aeration pipeline (the main pipe or the branch pipe). The surface layer 5 is of a cast-in-place concrete structure, the heating pipe 18 is wrapped in, so that heat emitted to the outside by the heating pipe 18 in the operation process can be transmitted out through the surface layer 5, thermal drying is carried out on sludge on the surface layer 5, the existing heat source of a sewage plant is fully utilized, and the water content of the sludge is further reduced.

In this embodiment, the escape canal 6 has been seted up to the storage yard 1 upper surface, escape canal 6 encircle set up in the surface course 5 outside, the bottom sets up for the slope in the escape canal 6, the 6 lowest departments of escape canal are equipped with sump pit 7.

The drainage ditch 6 is used for collecting sewage water and preventing the sewage from flowing to the periphery to cause environmental pollution.

The water collection pit 7 can be covered with a cover plate 9, and the cover plate 9 is a steel grating cover plate, so that people can walk conveniently.

The bottom in the water collection pit 7 is communicated with an external sewage inspection well through a drain pipe 8. The gradient of the bottom in the drainage ditch 6 is not less than 1%. By this arrangement, sewage can be rapidly discharged through the drain pipe 8.

The sludge drying bed that this embodiment provided still includes heap canopy 2, heap canopy 2 include four fixed set up in post 3 on the storage yard 1, fixed set up in roof 4 on post 3 top, roof 4 is used for covering the whole storage yard 1.

Wherein, four posts 3 are respectively arranged at four corners of a rectangular structure. So that all four sides of the rectangular structure are open.

The roof 4 is a flat roof or a pitched roof. The roof 4 can cover the whole storage yard 1, so that the sludge drying is prevented from being influenced by weather and other reasons.

The sludge drying bed provided by the embodiment further comprises a connecting pipe 14 for communicating the heating air inlet pipe 10 and the heating air outlet pipe 11;

the heating air inlet pipe 10 is provided with a first control valve 121 and a second control valve 122 positioned downstream of the first control valve 121;

a third control valve 132 and a fourth control valve 131 positioned at the downstream of the third control valve 132 are arranged on the heating air outlet pipe 11;

the communication pipe 14 is located between the first control valve 121 and the second control valve 122 at the position where the heating air inlet pipe 10 is communicated, the communication pipe 14 is located between the third control valve 132 and the fourth control valve 131 at the position where the heating air outlet pipe 11 is communicated, and a fifth control valve 151 is provided on the communication pipe 14.

So set up, as shown in fig. 4, when the heat of the aeration pipe needs to be utilized to dry the sludge, the first control valve 121, the second control valve 122, the third control valve 132 and the fourth control valve 131 are opened, and meanwhile, the fifth control valve 151 is closed, so that the hot gas can flow through the heating air inlet pipe 10, the heating pipe 18 and the heating air outlet pipe 11 in sequence, and the heat emitted by the hot gas can carry out thermal drying on the sludge on the surface layer 5.

As shown in fig. 5, when the sludge is not dried by using the heat of the aeration pipe, the hot gas can be directly transported away through the connecting pipe 14 without passing through the heating pipe 18 by closing the second control valve 122 and the third control valve 132 and simultaneously opening the first control valve 121, the fifth control valve 151 and the fourth control valve 131.

The sludge drying bed provided in this embodiment further includes a first valve well 12, a second valve well 13, and a third valve well 15, where the first control valve 121 and the second control valve 122 are both disposed in the first valve well 12, the third control valve 132 and the fourth control valve 131 are both disposed in the second valve well 13, and the fifth control valve 15 is disposed in the third valve well 15. The valve well is arranged to be convenient to operate when part of pipe network operation or maintenance operation needs to be opened and closed, so that the pipe is convenient to periodically check, clean and dredge, and the pipe is prevented from being blocked.

Finally, the sludge drying bed provided by the embodiment further comprises a flushing water pipe 16 communicated with the tap water pipe, and a flushing valve 17 is arranged on the flushing water pipe 16. The drain 6 or the facing 5 may be rinsed when necessary.

Detailed description of the utility model

Example 1

The wet and rainy season or the large sludge production amount, the working condition of needing emergency desliming, the operation effect of the sludge drying field is poor, and the treatment period is longer. At this time, the first control valve 121, the second control valve 122, the third control valve 132 and the fourth control valve 131 are opened, and the fifth control valve 151 is closed, so that the heat of the aeration pipeline is used to heat the surface of the sludge storage yard, and the dewatering and drying capacity is increased.

Example 2

In the season of less rain of drying, the sludge drying bed operation effect is better, and this moment is closed second control valve 122 third control valve 132 open simultaneously first control valve 121 fifth control valve 151 fourth control valve 131, sludge drying bed is desiccated under natural effect, and the sludge water accessible escape canal 6 is collected and is discharged, and the discharge is most to the factory sewage inspection shaft. When the drainage ditch 6 or the surface layer 5 needs to be cleaned, the flushing water pipe 16 is used for flushing and cleaning with factory clean water, flushing water is still collected and discharged through the drainage ditch 6, and most of discharge is a factory sewage inspection well.

In some other embodiments, the reclaimed water can be used for flushing and cleaning instead of clean water, and the flushing water is still collected and discharged through the drainage ditch 6, and the discharge is mostly a factory sewage inspection well.

Mechanisms, components, and members not described in the specific structure of the present utility model are all existing structures already existing in the prior art. Can be purchased directly from the market.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A sludge drying plant utilizing aeration pipe heat, comprising:

the sludge drying device comprises a storage yard (1), wherein a surface layer (5) for stacking sludge to be dried is arranged in the middle of the storage yard (1), the surface layer (5) is of a cast-in-place concrete structure, and a heating pipe (18) is arranged in the surface layer (5) in a reciprocating mode;

the heating air inlet pipe (10), one end of the heating air inlet pipe (10) is communicated with one end of the heating pipe (18), and the other end of the heating air inlet pipe (10) is communicated with an aeration pipeline in the air inlet direction;

the heating air outlet pipe (11), heating air outlet pipe (11) one end with heating pipe (18) other end intercommunication, heating air outlet pipe (11) other end and direction aeration pipeline intercommunication of giving vent to anger.

2. The sludge drying bed utilizing heat of an aeration pipeline according to claim 1, wherein a drainage ditch (6) is formed in the upper surface of the storage yard (1), the drainage ditch (6) is arranged on the outer side of the surface layer (5) in a surrounding mode, the inner bottom of the drainage ditch (6) is arranged in a gradient mode, and a water collecting pit (7) is formed in the lowest position of the drainage ditch (6).

3. A sludge drying plant utilizing aeration pipe heat according to claim 2, characterized in that the bottom in the pit (7) is connected to an external sewage inspection well through a drain pipe (8).

4. A sludge drying plant utilizing heat of an aeration pipe according to claim 2, wherein the gradient of the bottom inside the drain (6) is not less than 1%.

5. The sludge drying bed utilizing heat of an aeration pipeline according to claim 1, further comprising a stacking shed (2), wherein the stacking shed (2) comprises a column (3) fixedly arranged on the stacking yard (1) and a roof (4) fixedly arranged at the top end of the column (3).

6. A sludge drying plant utilizing aeration conduit heat according to claim 5 wherein the stack (2) comprises four of the columns (3).

7. A sludge drying plant utilizing aeration conduit heat according to claim 5 wherein the roof (4) is a flat roof or a pitched roof.

8. A sludge drying plant utilizing aeration pipe heat according to claim 1, further comprising a communication pipe (14) for communicating the heating air inlet pipe (10) with the heating air outlet pipe (11);

a first control valve (121) and a second control valve (122) positioned at the downstream of the first control valve (121) are arranged on the heating air inlet pipe (10);

a third control valve (132) and a fourth control valve (131) positioned at the downstream of the third control valve (132) are arranged on the heating air outlet pipe (11);

the connecting pipe (14) is communicated with the heating air inlet pipe (10) and is positioned between the first control valve (121) and the second control valve (122), the connecting pipe (14) is communicated with the heating air outlet pipe (11) and is positioned between the third control valve (132) and the fourth control valve (131), and a fifth control valve (151) is arranged on the connecting pipe (14).

9. The sludge drying bed utilizing heat of an aeration pipeline according to claim 8, further comprising a first valve well (12), a second valve well (13), and a third valve well (15), wherein the first control valve (121) and the second control valve (122) are both disposed in the first valve well (12), the third control valve (132) and the fourth control valve (131) are both disposed in the second valve well (13), and the fifth control valve (151) is disposed in the third valve well (15).

10. A sludge drying plant utilizing aeration conduit heat according to claim 1, further comprising a flushing pipe (16) communicating with the tap water pipe, the flushing pipe (16) being provided with a flushing valve (17).