CN220635798U

CN220635798U - Feeding device for thermal desorption equipment and thermal desorption equipment

Info

Publication number: CN220635798U
Application number: CN202322281070.6U
Authority: CN
Inventors: 万德山; 赵峰; 王冬; 翟富科; 孟藤藤; 陈民; 郭伟伟; 边杨子
Original assignee: Shandong Dacheng Environmental Remediation Co ltd
Current assignee: Sinochem Environmental Remediation Shandong Co ltd
Priority date: 2023-08-23
Filing date: 2023-08-23
Publication date: 2024-03-22
Anticipated expiration: 2033-08-23

Abstract

The utility model relates to the technical field of thermal remediation of polluted soil, and discloses a feeding device for thermal desorption equipment and the thermal desorption equipment. The feeding device comprises a feeding member and a vibrating member, wherein a feeding cavity is formed in the feeding member, the transverse sectional area of the feeding cavity gradually decreases from top to bottom, a feeding port is formed in the bottom of the feeding member, the feeding port is in sealing connection with the feeding port of the thermal desorption chamber, and the vibrating member is connected with the feeding member. The thermal desorption equipment comprises the feeding device. In the feeding device provided by the utility model, the polluted soil can be piled up in the feeding cavity to always seal the feeding port, so that thermal desorption tail gas and soil dust in the thermal desorption chamber can be prevented from overflowing, secondary pollution accidents are avoided, the polluted soil can uniformly fall from the feeding port, stable feeding of the polluted soil is realized, the size of the feeding device is smaller, the equipment cost is saved, the space occupation is reduced, and meanwhile, the energy consumption and the failure rate of the vibrating component are lower.

Description

Feeding device for thermal desorption equipment and thermal desorption equipment

Technical Field

The utility model relates to the technical field of thermal remediation of polluted soil, in particular to a feeding device for thermal desorption equipment and the thermal desorption equipment.

Background

When the contaminated soil is subjected to thermal desorption operation, target pollutants and water are heated and converted into gas to enter thermal desorption tail gas, so that the aim of soil remediation is fulfilled. In order to reduce the content of soil dust in the thermal desorption tail gas, the negative pressure value in the thermal desorption chamber is kept between-50 Pa and-150 Pa. Since the volume of water in the soil becomes 1244 times the original volume after being converted into steam, this process generally occurs near the feed end in the thermal desorption chamber, and thus the feed end is a position where evaporation of water from the contaminated soil is concentrated, and therefore the exhaust gas collection pipe of the thermal desorption chamber is generally located near the feed inlet of the contaminated soil.

When adopting thermal desorption equipment to carry out thermal remediation to contaminated soil, contaminated soil gets into the belt weigher through the feeder hopper, evenly enters into feeding belt conveyer after weighing the measurement through the belt weigher, falls into feeding screw conveyer or belt conveyer from feeding belt conveyer again in, perhaps, contaminated soil falls into blanking fill and the star discharge valve below the blanking fill from feeding belt conveyer in, later gets into thermal desorption room and carries out thermal desorption operation. As can be seen, the contaminated soil feeding devices currently in use are typically screw conveyors, belt conveyors or a combination of a blanking hopper and star discharge.

Wherein, the thermal desorption equipment of the feeding screw conveyor is used, the filling rate of the polluted soil in the feeding screw conveyor is less than 100 percent, so that the thermal desorption chamber can be connected with an external space through an upper passage of the feeding screw conveyor. Because the vapor at the feeding end is largely evaporated, the local pressure at the feeding end is increased, if the negative pressure value in the thermal desorption chamber is too low, the feeding end is possibly in a positive pressure state, so that the thermal desorption tail gas and entrained soil dust overflow to cause secondary pollution accidents. Because feeding screw conveyer and thermal desorption room are in same central line state, it is nearer to apart from thermal desorption tail gas collection mouth, along with the thermal desorption tail gas of high temperature upflow's characteristic and the extraction operation of tail gas collecting pipe, the thermal desorption tail gas of high temperature contacts with the lower feeding screw conveyer's of temperature metal outer wall, the vapor in the thermal desorption tail gas condenses into water, form mud after combining with the soil dust, cover on feeding screw conveyer's metal outer wall, and along with the rising of rotary kiln temperature, the mud surface loses moisture and forms the hard lump, firmly bond on feeding screw conveyer's metal outer wall. If the feeding screw conveyor is required to be pulled out from the thermal desorption chamber after failure, the hard blocks obstruct the pulling out of the feeding screw conveyor, and finally the thermal desorption device is stopped, so that the working efficiency is affected. In addition, the feed screw conveyor is large in size, which results in a large overhead platform for supporting the feed screw conveyor, and relatively high equipment cost. Meanwhile, the motor for driving the feeding screw conveyor is high in power and relatively high in energy consumption. The screw conveyor is adopted for feeding, when the blades rotate to the tail part of the feeding screw, the feeding amount in the thermal desorption chamber is reduced, and the feeding amount in the rest time period is increased, so that the feeding amount is not completely uniform.

The thermal desorption equipment of the belt conveyor is used, and a larger inlet is required to be formed in the belt conveyor on the thermal desorption chamber; in order to keep the thermal desorption tail gas in the thermal desorption chamber from overflowing, the negative pressure value in the thermal desorption chamber needs to be kept high, which leads to more energy consumption. And, higher negative pressure value leads to more soil dust to enter into in the thermal desorption tail gas, leads to the load increase of tail gas treatment facility, and the energy consumption further increases.

The thermal desorption device which uses the combination of the blanking hopper and the star-shaped discharge valve has the soil throughput of the feeding hopper and the star-shaped discharge valve which are far higher than the throughput of the thermal desorption device, so that the thermal desorption chamber can be connected with the outside through the feeding hopper and the star-shaped discharge valve. Because the vapor at the feeding end is largely evaporated, the local pressure at the feeding end is increased, if the negative pressure value in the thermal desorption chamber is too small, the feeding end is possibly in a positive pressure state, so that the thermal desorption tail gas and entrained soil dust overflow to cause secondary pollution accidents. After the high-temperature thermal desorption tail gas contacts with low-temperature polluted soil, water vapor in the thermal desorption tail gas is condensed into water to enter the polluted soil, and the water vapor is adhered to the rotating blades of the star-shaped discharge valve after forming slurry; along with the increasing formation of slurry, the star-shaped discharge valve is blocked by the slurry completely soon, and the feeding is stopped to clean the rotating blades of the star-shaped discharge valve and then feed the slurry again, so that the failure rate is higher, and the working efficiency is influenced.

Disclosure of Invention

In order to solve the technical problems described above or at least partially solve the technical problems described above, the present utility model provides a feeding device for a thermal desorption apparatus and a thermal desorption apparatus.

The utility model provides a feeding device for thermal desorption equipment, which comprises a thermal desorption chamber, wherein the feeding device comprises a feeding member and a vibration member, a feeding cavity for accommodating polluted soil is arranged in the feeding member, the transverse sectional area of the feeding cavity is gradually reduced from top to bottom, a feeding port for communicating with the feeding cavity is arranged at the bottom of the feeding member, the feeding port is in sealing connection with the feeding port of the thermal desorption chamber, and the vibration member is connected with the feeding member.

Optionally, the inside of feeding component is equipped with the regulating plate, the inner wall of regulating plate is equipped with the slope, the middle part of regulating plate is equipped with and is used for the intercommunication the pay-off chamber with the regulation hole of pay-off mouth.

Optionally, a connecting section is arranged at the bottom of the feeding component, the feeding port is arranged on the connecting section, and the connecting section is in sealing connection with the feeding pipeline of the thermal desorption chamber.

Optionally, a discharging pipeline is arranged at the feeding hole in a penetrating way, one end of the discharging pipeline is communicated with the adjusting hole, and the other end of the discharging pipeline is used for conveying the polluted soil towards the thermal desorption chamber.

Optionally, the inner wall of the feeding cavity is in a continuous slope shape.

Optionally, the feeding device further comprises a bracket, and the feeding member is arranged on the bracket.

Optionally, the support includes a landing leg and a backup pad that sets up on the landing leg, the feeding component sets up on the backup pad, and the bottom of feeding component stretches out downwards the backup pad.

Optionally, the vibration member includes:

the vibration module is arranged on the supporting plate;

and one end of the spring is connected with the vibration module, and the other end of the spring is connected with the periphery of the feeding component.

Optionally, a reinforcing plate is arranged on the periphery of the feeding member, and one end, far away from the vibration module, of the spring is connected with the reinforcing plate through a mounting frame.

The utility model also provides thermal desorption equipment, which comprises the feeding device for the thermal desorption equipment.

Compared with the prior art, the technical scheme provided by the embodiment of the utility model has the following advantages:

according to the feeding device provided by the utility model, the feeding port of the feeding component is in sealing connection with the feeding port of the thermal desorption chamber, the transverse sectional area of the feeding cavity is gradually reduced from top to bottom, so that polluted soil can be accumulated in the feeding cavity to always seal the feeding port through the polluted soil, further, thermal desorption tail gas in the thermal desorption chamber and soil dust in the tail gas can be prevented from overflowing, secondary pollution accidents are avoided, the polluted soil of the feeding cavity can uniformly fall from the feeding port through vibration of the vibration component, stable feeding of the polluted soil is realized, stability in thermal desorption operation is ensured, equipment cost is saved, space occupation is reduced, meanwhile, feeding of the polluted soil is realized through vibration of the vibration component, running cost is greatly reduced, transfer equipment is not required in the feeding process, the failure rate of the equipment is reduced, continuous and stable running of the equipment is ensured, and further, and working efficiency is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural view of a feeding device according to an embodiment of the present utility model.

Description of the reference numerals

1. A feed member; 11. a feed cavity; 12. a connection section; 13. a feed hopper; 2. a vibration member; 21. a vibration module; 22. a spring; 23. a reinforcing plate; 24. a mounting frame; 3. an adjusting plate; 4. a discharge pipe; 5. a bracket; 51. a support leg; 52. a support plate; 6. the soil is polluted.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. The embodiments of the present utility model and the features in the embodiments may be combined with each other without collision.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it is apparent that the embodiments in the specification are only some embodiments of the present utility model, but not all embodiments.

As shown in fig. 1, an embodiment of the present utility model provides a feeding device for a thermal desorption apparatus, wherein the thermal desorption apparatus includes a thermal desorption chamber, and the feeding device includes a feeding member 1 and a vibration member 2.

The inside of feeding member 1 is equipped with the pay-off chamber 11 that is used for holding contaminated soil 6, and the transverse cross-sectional area in pay-off chamber 11 reduces from top to bottom gradually, and feeding member 1's bottom is equipped with the pay-off mouth that is used for with pay-off chamber 11 intercommunication, and pay-off mouth and thermal desorption room's feed inlet sealing connection, vibrating member 2 are connected with feeding member 1 to drive feeding member 1 vibration through vibrating member 2, so that the contaminated soil 6 of feeding member 1 inside can evenly fall through the pay-off mouth. Specifically, the top opening of the feeding member 1 is opened, so that the contaminated soil 6 in the previous process can enter the feeding cavity 11 through the top opening of the feeding member 1, and since the transverse sectional area of the feeding cavity 11 gradually decreases from top to bottom, a large amount of contaminated soil 6 entering the feeding cavity 11 will be accumulated in the feeding cavity 11, so that the feeding port can be sealed, and the feeding port is in sealing connection with the feeding port of the thermal desorption chamber, so that the thermal desorption chamber and the external environment can be isolated through the contaminated soil 6 inside the feeding cavity 11.

According to the feeding device provided by the utility model, the feeding port of the feeding component 1 is in sealed connection with the feeding port of the thermal desorption chamber, the transverse sectional area of the feeding cavity 11 is gradually reduced from top to bottom, so that the polluted soil 6 can be piled up in the feeding cavity 11 to always seal the feeding port through the polluted soil 6, further, thermal desorption tail gas in the thermal desorption chamber and soil dust in the tail gas can be ensured not to overflow, secondary pollution accidents are avoided, the polluted soil 6 of the feeding cavity 11 can uniformly fall from the feeding port through vibration of the vibration component 2, stable feeding of the polluted soil 6 is realized, stability in thermal desorption operation is ensured, compared with the traditional feeding screw conveyor and belt conveyor, equipment cost is saved, space occupation is reduced, meanwhile, feeding of the polluted soil 6 is realized through vibration of the vibration component 2, the operation cost is greatly reduced, the failure rate of equipment is reduced, continuous and stable running of the equipment is ensured, and further, the working efficiency is ensured.

As shown in fig. 1, an adjusting plate 3 is arranged in the feeding member 1, a slope surface is arranged on the inner wall of the adjusting plate 3, and an adjusting hole for communicating the feeding cavity 11 with the feeding port is arranged in the middle of the adjusting plate 3. The adjusting plate 3 is in a conical plate structure, so that the polluted soil 6 entering the feeding cavity 11 moves towards the direction of the adjusting hole under the guiding action of the adjusting plate 3, and flows to a designated position through the feeding port. Under this kind of design mode, accessible sets up the inclination of the slope face of regulating plate 3 and adjusts the diameter size of hole and change the discharge volume of contaminated soil 6 to satisfy the feeding demand of thermal desorption room.

In other embodiments, the adjusting plate 3 is detachably connected with the feeding member 1, so that the discharging amount of the feeding member 1 can be changed by changing the adjusting plate 3 to meet different working conditions. Wherein, regulating plate 3 can laminate on the inner wall of feeding member 1, when needs change regulating plate 3, only need with regulating plate 3 lift can. After the adjusting plate 3 with the new specification is replaced, the adjusting plate 3 is placed into the inner wall of the discharging member, and the adjusting plate 3 slides downwards along the inner wall of the discharging member until the outer wall of the adjusting plate 3 is attached to the inner wall of the discharging member. This design increases the convenience of replacement of the adjusting plate 3. In addition, in order to avoid the position of the adjusting plate 3 from being shifted in the vibration process following the feeding member 1, the adjusting plate 3 after being installed in place can be fixed through threads so as to ensure the firmness of the adjusting plate 3.

As shown in fig. 1, a connecting section 12 is arranged at the bottom of the feeding member 1, a feeding port is arranged on the connecting section 12, and the connecting section 12 is in sealing connection with a feeding pipeline of the thermal desorption chamber. Under this kind of design mode, through linkage segment 12 and thermal desorption room's charge-in pipeline sealing connection in order to realize the feed inlet sealing connection of feed inlet and thermal desorption room, further ensure sealed effect, prevent the thermal desorption tail gas in the thermal desorption room and the soil dust in the tail gas from overflowing. Specifically, the connection section 12 has a straight cylindrical shape, and the feed pipe of the thermal desorption chamber is sleeved on the outer periphery of the connection section 12 to ensure the connection tightness. Wherein, the feeding pipeline can adopt flexible material to change the direction of delivery of contaminated soil 6, make the design more nimble.

In addition, the feed inlet department wears to be equipped with ejection of compact pipeline 4, and the one end and the regulation hole intercommunication of ejection of compact pipeline 4, and the other end of ejection of compact pipeline 4 is used for carrying contaminated soil 6 towards the thermal desorption room. Through setting up ejection of compact pipeline 4 for the contaminated soil 6 that flows out through the regulation hole can directly flow to the thermal desorption room through ejection of compact pipeline 4, ensures that contaminated soil 6 can stably carry.

In some embodiments, as shown in fig. 1, the inner wall of the feed chamber 11 is in the form of a continuous sloped surface. I.e. the inner wall of the feeding chamber 11 is tapered so that the contaminated soil 6 can be transported evenly along the inner wall of the feeding chamber 11.

Preferably, the feeding member 1 is a feeding hopper 13, and the feeding hopper 13 is cone-shaped, so that the outer wall of the feeding member 1 is also a continuous slope surface to reduce space occupation.

The feeding device of the application further comprises a support 5, wherein the feeding member 1 is arranged on the support 5, and the feeding member 1 is further supported at a proper position through the support 5 so as to meet feeding requirements.

As shown in fig. 1, the bracket 5 includes a leg 51 and a support plate 52 provided on the leg 51, the feeding member 1 is provided on the support plate 52, and the bottom end of the feeding member 1 protrudes downward from the support plate 52. The landing leg 51 is as supporting foundation, and reducible area occupied is lower to the requirement of holding surface, is equipped with the through-hole on the backup pad 52, and at this moment, feeding member 1 can be foretell feeder hopper 13 for the bottom of feeder hopper 13 passes the through-hole, and makes the periphery of feeder hopper 13 support in the through-hole department, ensures the location of feeder hopper 13, and satisfies the feeding demand.

In some embodiments, the vibration member 2 includes a vibration module 21 and a spring 22. The vibration module 21 is disposed on the support plate 52 to provide a support foundation for the installation of the vibration module 21; one end of the spring 22 is connected to the vibration module 21, and the other end of the spring 22 is connected to the outer periphery of the feed member 1. Under this kind of design mode, the vibration that vibration module 21 produced can pass through spring 22 and transmit to feeding component 1 on, and then arouse feeding component 1's vibration, and the rethread feeding component 1 drives the contaminated soil 6 vibration in the pay-off chamber 11 for contaminated soil 6 can all with interior follow the pay-off mouth and carry, in order to satisfy the demand of the even feeding of thermal desorption room. The vibrating member 2 of this design is simple in structure and can meet the vibration demand. The vibration module 21 may be an excitation block or the like.

In other embodiments, because the feeding member 1 vibrates under the action of the vibration member 2, the phenomenon that the connection position of the feeding member 1 and the spring 22 is easily disconnected occurs, therefore, the periphery of the feeding member 1 of the application is provided with the reinforcing plate 23, one end, far away from the vibration module 21, of the spring 22 is connected with the reinforcing plate 23 through the mounting frame 24, so that the connection between the spring 22 and the feeding member 1 is realized through the mounting frame 24 and the reinforcing plate 23, the connection firmness is further improved, and the service life of equipment is ensured.

The utility model also provides thermal desorption equipment, which comprises the feeding device for thermal desorption equipment, wherein the feeding device for thermal desorption equipment comprises all the technical characteristics of the feeding device for thermal desorption equipment.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A feed arrangement for thermal desorption equipment, thermal desorption equipment includes thermal desorption room, its characterized in that, feed arrangement includes feeding component (1) and vibrating member (2), the inside of feeding component (1) is equipped with and is used for holding the pay-off chamber (11) of polluted soil (6), just the transverse cross sectional area of pay-off chamber (11) reduces from top to bottom gradually, the bottom of feeding component (1) be equipped with be used for with the pay-off mouth of pay-off chamber (11) intercommunication, the pay-off mouth with thermal desorption room's feed inlet sealing connection, vibrating member (2) with feeding component (1) are connected.

2. The feeding device for thermal desorption equipment according to claim 1, wherein an adjusting plate (3) is arranged in the feeding member (1), a slope surface is arranged on the inner wall of the adjusting plate (3), and an adjusting hole for communicating the feeding cavity (11) and the feeding port is arranged in the middle of the adjusting plate (3).

3. The feeding device for thermal desorption equipment according to claim 2, wherein a connecting section (12) is arranged at the bottom of the feeding member (1), the feeding port is arranged on the connecting section (12), and the connecting section (12) is in sealing connection with a feeding pipeline of the thermal desorption chamber.

4. A feed device for thermal desorption apparatus according to claim 3, wherein a discharge pipe (4) is provided at the feed inlet, one end of the discharge pipe (4) is communicated with the adjusting hole, and the other end of the discharge pipe (4) is used for conveying contaminated soil (6) toward the thermal desorption chamber.

5. A feed device for thermal desorption apparatus according to claim 1, wherein the inner wall of the feed chamber (11) is in the form of a continuous ramp surface.

6. A feed arrangement for a thermal desorption apparatus according to any one of claims 1 to 5, further comprising a support (5), the feed member (1) being arranged on the support (5).

7. The feeding device for a thermal desorption apparatus according to claim 6, wherein the bracket (5) comprises a leg (51) and a support plate (52) provided on the leg (51), the feeding member (1) is provided on the support plate (52), and the bottom end of the feeding member (1) protrudes downward from the support plate (52).

8. The feeding device for a thermal desorption apparatus according to claim 7, wherein the vibration member (2) comprises:

a vibration module (21) provided on the support plate (52);

and one end of the spring (22) is connected with the vibration module (21), and the other end of the spring is connected with the periphery of the feeding component (1).

9. Feeding device for thermal desorption equipment according to claim 8, characterized in that the periphery of the feeding member (1) is provided with a stiffening plate (23), and the end of the spring (22) remote from the vibration module (21) is connected with the stiffening plate (23) by means of a mounting bracket (24).

10. Thermal desorption apparatus comprising a feed device according to any one of claims 1 to 9.