CN-121990751-A - Sludge drying equipment with reverse tempering lock control

CN121990751ACN 121990751 ACN121990751 ACN 121990751ACN-121990751-A

Abstract

The invention discloses sludge drying equipment with reverse quenching and tempering lock control, which comprises a shell, wherein a coaxial linkage assembly, a quenching and tempering drying unit and a heat exchange condensing assembly are arranged in the shell, the coaxial linkage assembly comprises a main shaft which is horizontally arranged in a rotating mode and a motor which is in driving connection with the main shaft, the quenching and tempering drying unit comprises a quenching and tempering pre-dewatering assembly and a gradient drying reaction regulating and controlling assembly which are sequentially arranged along the axial direction of the main shaft, working parts of the quenching and tempering pre-dewatering assembly and the gradient drying reaction regulating and controlling assembly are coaxially and fixedly connected with the main shaft, and an air inlet end of the heat exchange condensing assembly is communicated with an air outlet end of the gradient drying reaction regulating and controlling assembly. According to the sludge drying equipment with reverse quenching and tempering lock control, the three-stage fractional condensation is used for precisely separating colloid and the main shaft is linked to realize front and back working procedure self-adaptive matching, so that the difficult problem of colloid enrichment in condensate water recycling is solved fundamentally, the long-acting stability of water circulation is ensured, and the practical requirements of construction scenes are met.

Inventors

MA JINLONG
ZHANG BO
WANG MENGPING
LI JIAN
LONG WEIHUA
HE FANG
Li Menlong
YANG JIAWEI

Assignees

中国建筑第二工程局有限公司

Dates

Publication Date: 20260508
Application Date: 20260407

Claims (10)

1. The sludge drying equipment with the reverse tempering lock control comprises a machine shell (1), wherein a coaxial linkage assembly (2), a tempering drying unit (3) and a heat exchange condensing assembly (4) are arranged in the machine shell (1), the coaxial linkage assembly (2) comprises a main shaft (21) which is horizontally arranged in a rotating mode and a motor (22) which is in driving connection with the main shaft (21), the tempering drying unit (3) comprises a tempering pre-dewatering assembly (31) and a gradient drying reaction regulating assembly (32) which are sequentially arranged along the axial direction of the main shaft (21), working parts of the tempering pre-dewatering assembly (31) and the gradient drying reaction regulating assembly (32) are coaxially and fixedly connected with the main shaft (21), an air inlet end of the heat exchange condensing assembly (4) is communicated with an air outlet end of the gradient drying reaction regulating assembly (32), the sludge drying equipment is characterized in that the heat exchange condensing assembly (4) comprises an integral stepped plate frame (45), a first-stage high-temperature condensing cavity (46), a second-stage medium-temperature condensing cavity (47) and a third-stage low-temperature condensing cavity (48) which are arranged in series are arranged in the stepped plate frame (45), the bottoms of the three-stage high-temperature condensing cavities are respectively arranged in a stepped mode, the three-stage condensation cavities are respectively and the bottom of the three-stage condensation cavities are respectively provided with a water draining structure, the two-stage condensation structures are respectively connected with a water draining structure, the water outlet end of the reverse tempering assembly (5) extends into the tempering pre-dewatering assembly (31), and the reverse tempering assembly (5) is in transmission fit with the main shaft (21) and is used for enabling the adding amount of the condensed water to be matched with the drying working condition synchronously.
2. The sludge drying equipment with reverse quenching and tempering lock control as claimed in claim 1, wherein the gradient drying reaction regulation and control assembly (32) comprises a pre-drying bin (321), a constant temperature regulation and control bin (322) and a balance discharging bin (323) which are sequentially arranged along the axial direction of the main shaft (21), adjacent bin bodies are separated by a partition plate (324), a dynamic sealing structure is arranged between the partition plate (324) and the main shaft (21), and an arc-shaped opening for materials to pass through is formed in the bottom of the partition plate (324).
3. The sludge drying equipment with reverse tempering and lock control according to claim 2, wherein a spiral pushing blade (325), a spiral reaction blade (326) and a spiral discharging blade (327) are coaxially and fixedly connected to the pre-drying bin (321), the constant temperature regulating bin (322) and the balance discharging bin (323) respectively, an air inlet pipe (42) of the pre-drying bin (321) and the constant temperature regulating bin (322) is arranged at a bin body feeding end, an air outlet branch pipe (43) is arranged at a bin body discharging end, and an air inlet pipe (42) of the balance discharging bin (323) is arranged at a bin body discharging end, and an air outlet branch pipe (43) is arranged at a bin body feeding end.
4. The sludge drying equipment with reverse tempering and locking control according to claim 3, wherein anti-blocking right angle plates (329) are fixed in the pre-drying bin (321), the constant temperature control bin (322) and the balance discharging bin (323), the anti-blocking right angle plates (329) are arranged right below pipe orifices of the air inlet pipe (42) and the air outlet branch pipe (43), vertical plates of the anti-blocking right angle plates are perpendicular to the material travelling direction, and horizontal plate surfaces are parallel to corresponding pipe orifices and leave an air passing gap.
5. The sludge drying equipment with reverse quenching and tempering lock control as claimed in claim 1, wherein the heat exchange condensing assembly (4) further comprises a refrigerant plate frame (413) corresponding to the three condensing chambers, the refrigerant plate frame (413) and the stepped plate frame (45) are surrounded to form a refrigerant channel (414), a refrigerant inlet pipe (415) of the refrigerant channel (414) is arranged on the corresponding side of the three-stage low-temperature condensing chamber (48), and a refrigerant outlet pipe (416) is arranged on the corresponding side of the one-stage high-temperature condensing chamber (46) to form a countercurrent heat exchange structure.
6. The sludge drying equipment with reverse tempering and locking control according to claim 1, wherein baffle plates (49) are fixed in the first-stage high-temperature condensing cavity (46), the second-stage medium-temperature condensing cavity (47) and the third-stage low-temperature condensing cavity (48), and the baffle plates (49) are arranged in an up-and-down staggered manner and are used for forming an S-shaped air path in the condensing cavity.
7. The sludge drying equipment with reverse tempering and lock control according to claim 1, wherein the reverse tempering assembly (5) comprises a recovery bucket (412), a steady flow cup (51) and a self-weight drainage tube (52), the recovery bucket (412) is in sealing communication with a recovery port (411) of the secondary medium-temperature condensation cavity (47), the steady flow cup (51) is inverted in the recovery bucket (412), the water inlet end of the self-weight drainage tube (52) extends into the steady flow cup (51), and the water outlet end of the self-weight drainage tube extends into a tempering bin (311) of the tempering pre-dewatering assembly (31).
8. The sludge drying equipment with reverse quenching and tempering lock control according to claim 7, wherein the steady flow cup (51) is provided with an overflow port (53), a vertically movable counterweight plate (54) is inserted at the overflow port (53), the counterweight plate (54) is connected with a driven rod (55), a cam (56) is coaxially and fixedly connected to the main shaft (21), and the cam (56) is in butt fit with the driven rod (55) and is used for controlling the on-off of the overflow port (53) through the rotation of the main shaft (21).
9. The sludge drying equipment with reverse tempering and lock control according to claim 1, wherein the tempering pre-dewatering assembly (31) comprises a tempering bin (311) and a dewatering bin (319) which are communicated with each other, stirring blades (313) are coaxially and fixedly connected in the tempering bin (311), screw extrusion blades (3110) are coaxially and fixedly connected in the dewatering bin (319), and a water filtering plate (3111) with water filtering holes is arranged at the bottom of the dewatering bin (319).
10. The sludge drying equipment with reverse tempering and lock control according to claim 9, wherein one end of the stirring blade (313) close to a feed hopper (312) of the tempering bin (311) is provided with a large-lead smooth spiral blade, and the single-circle conveying capacity of the large-lead smooth spiral blade is reversely matched with the rated treatment capacity of the drying bin.

Description

Sludge drying equipment with reverse tempering lock control Technical Field The invention belongs to the technical field of green construction of constructional engineering, and particularly relates to sludge drying equipment with reverse tempering lock control. Background Along with the continuous perfection of a green construction system of the building engineering, the solid waste reduction treatment and the water resource recycling in the whole construction process become core hardness indexes for environmental protection and control of engineering projects. The working procedures of foundation pit excavation, vehicle flushing, site dust fall, concrete maintenance and the like in the construction engineering can continuously generate a large amount of high silicate Huang Niwu mud which takes silicate minerals such as kaolinite, illite and the like as main solid phase components and is strongly alkaline due to the mixing of cement hydration products, and the mud has high water content, large volume and easy secondary pollution, and is an important object for environmental protection and control in the construction site. The sludge drying is used as a core process of the sludge reduction, harmless and recycling treatment, the sludge volume can be greatly reduced through dehydration, the difficulty and cost of outward transportation treatment are reduced, condensed water generated in the drying process can be recycled to links such as site flushing, spraying dust fall and the like, and the sludge drying is a key for constructing a water circulation closed-loop system of a construction site, and is widely applied to various building and municipal infrastructure projects at present. Aiming at the treatment of the sludge, the prior art generally adopts a linear series mode of 'front-end independent tempering and pre-dewatering and rear-end independent sludge drying', adjusts the water content of the sludge to the adaptation range of drying equipment through front-end independent tempering, concentrating and pre-dewatering procedures, sends the sludge into rear-end drying equipment to finish deep dewatering, and directly recycles the drying condensate water to a front-end sewage treatment procedure, thereby forming a construction water circulation closed loop and meeting the water resource recycling requirement of green construction. However, in practical engineering application, when the linear series mode is operated for a long time, the core technical problem of poor long-term stability of the front-end mud-water separation system generally exists, and the problems are particularly that after the dried condensate water is recycled for a period of time, the flocculant is frequently completely failed in the front-end mud-water separation process, the cliff-like effect of mud-water separation is reduced, and even if the adding amount of the flocculant is greatly increased and different types of flocculants are replaced, effective compact flocs cannot be formed, the content of suspended matters in supernatant fluid of a sedimentation tank is rapidly increased, the mud-water separation effect is completely lost, and finally, the whole construction site water circulation system is completely paralyzed, so that the water resource closed-loop recycling required by green construction cannot be realized. Aiming at the phenomenon, conventional solution ideas of the technicians in the field are developed around the optimization of the mud-water separation process, the conventional purification of condensed water and the like, or the flocculant adding scheme is adjusted, the chemical adding amount is increased, or the structural parameters of a sedimentation tank are optimized, the hydraulic retention time is prolonged, or a multi-stage filtering and sedimentation device is additionally arranged before the condensed water is recycled, but the problems cannot be fundamentally solved by the means, the surface phenomenon can be relieved only briefly, and the same problems can be repeatedly exploded after the condensed water is continuously recycled. In the prior art, researches on the problem are focused on emergency treatment of surface phenomena, systematic analysis on deep occurrence mechanisms of the high silicate Huang Niwu sludge is fresh, the core cause of the problem is not focused, and the superposition effect of the self material characteristics of the high silicate Huang Niwu sludge and the inherent defects of the existing linear series mode is that the high silicate yellow mud sludge can continuously dissolve out and carry out molecular polycondensation reaction in a strong alkaline damp-heat environment in the drying process, nano-scale hydrophobic siliceous colloid is generated in situ, the colloid is not conventional suspended solid particles, but uniformly dispersed in condensed water in the form of stable hydrosol, the Brownian motion is extremely strong, the conventional filtering device is difficult to r