Electroplating sludge drying device and sludge treatment equipment

Abstract

The invention provides an electroplating sludge drying device and sludge treatment equipment. The electroplating sludge drying device comprises a hopper, a centrifugal fan and an energy-saving drying assembly, the hopper is provided with an air inlet and an air outlet, the centrifugal fan is communicated with the air inlet, and the energy-saving drying assembly comprises a first condenser, an evaporator, a heat regenerator, a compressor, a first pipeline and a second pipeline. The first pipeline is communicated with the air outlet, the evaporator is used for refrigerating gas in the first pipeline, the first condenser is used for heating gas in the second pipeline, and the heat regenerator is used for conducting heat exchange on high-temperature gas in the first pipeline and low-temperature gas in the second pipeline. The compressor communicates with the first condenser and the evaporator, and the compressor is used for compressing gas refrigerants so as to guide high-pressure normal-temperature gas gaseous refrigerants into the first condenser and suck low-pressure high-temperature gas liquid refrigerants generated by the evaporator.

Description

Technical Field

[0001] The present disclosure relates to the field of sludge drying devices, and in particular to an electroplating sludge drying device and sludge treatment equipment. Background Art

[0002] Electroplating sludge is obtained after the electroplating wastewater is precipitated, which contains a large amount of heavy metals. In order to avoid pollution caused by heavy metal emissions, the sludge obtained after precipitation needs to be treated. At present, there are three main treatment technologies for electroplating sludge: one is reduction treatment, which reduces the volume of electroplating sludge and releases land resources; the second is resource treatment, which uses technical methods to convert electroplating sludge into new recyclable resources such as building materials and biofertilizers; the third is precious metal recovery treatment, which uses technical methods to extract and recover precious metals in electroplating sludge. However, no matter which treatment technology is used, the electroplating sludge needs to be dried and dehydrated, and generally drying equipment is used to dry and dehydrate the sludge.

[0003] For example, Chinese patent CN202023037782.6 discloses a paddle dryer for drying electroplating sludge, including a dryer shell, a discharge hopper and a discharge port are provided at the bottom of the dryer shell, a lifting inner cylinder is provided in the dryer shell, a conical cylinder which is wide at the top and narrow at the bottom is provided on the top of the lifting inner cylinder, a lifting gear plate is connected to the top of the conical cylinder, a rotating gear is meshed at the upper end of the lifting gear plate, the rotating gear is connected to a driving motor, an extension cavity for extending the lifting gear plate is provided at the top of the dryer shell, two hollow rotating shafts are provided in the dryer shell, both of which are connected to a rotating motor, stirring blades are alternately provided on the parts of the two hollow rotating shafts extending into the lifting inner cylinder, and an electrically connected heating rod is installed in the hollow rotating shaft.

[0004] However, the structural design of the above-mentioned dryer has the following problems during use:

[0005] The above-mentioned dryer has a stirring blade in the dryer housing and a heating rod in the hollow shaft. The heating rod is used to heat the stirring blade. When the stirring blade contacts the sludge, the heat is transferred to the sludge, so that the water on the surface of the sludge evaporates and the purpose of drying is achieved. However, due to the small contact area of ​​the stirring blade for heat conduction, the sludge drying rate is slow. Heating the stirring blade for a long time consumes a lot of energy. In addition, the stirring blade is easy to wear and needs to be replaced frequently, resulting in increased costs.

[0006] Therefore, there is an urgent need for a drying device with a faster drying rate, lower energy consumption and lower production cost. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an electroplating sludge drying device and sludge treatment equipment with a faster drying rate, lower energy consumption and lower production cost.

[0008] The purpose of this disclosure is achieved through the following technical solutions:

[0009] An electroplating sludge drying device, comprising:

[0010] A hopper, wherein the interior of the hopper is used to contain sludge, and the hopper is provided with an air inlet and an air outlet;

[0011] a centrifugal fan, the centrifugal fan being in communication with the air inlet;

[0012] An energy-saving drying component, the energy-saving drying component comprises a first condenser, an evaporator, a regenerator, a compressor, a first pipeline and a second pipeline, the first pipeline is communicated with the air outlet, the evaporator is arranged corresponding to the first pipeline, the evaporator is used to cool the gas in the first pipeline, the first condenser is arranged corresponding to the second pipeline, the first condenser is used to heat the gas in the second pipeline, the first pipeline and the second pipeline are respectively arranged corresponding to the regenerator, and the regenerator is used to perform heat exchange between the high-temperature gas in the first pipeline and the low-temperature gas in the second pipeline; and,

[0013] The compressor is connected to the first condenser and the evaporator respectively, and is used to compress the refrigerant to introduce high-pressure and room-temperature gaseous refrigerant into the first condenser, and to absorb low-pressure and high-temperature liquid refrigerant generated by the evaporator.

[0014] In one of the embodiments, a throttle valve is provided in the pipeline between the compressor and the evaporator.

[0015] In one of the embodiments, the electroplating sludge drying device further includes a filter, which is installed on the first pipe and is connected to the air outlet and the evaporator respectively.

[0016] In one of the embodiments, the evaporator is provided with a drain port, and the drain port is used to drain the condensed water.

[0017] In one embodiment, the electroplating sludge drying device further includes a second condenser, one end of the second condenser is connected to the compressor, and the other end of the second condenser is connected to the first condenser.

[0018] In one embodiment, a one-way valve is provided between the second condenser and the first condenser, and a solenoid valve is provided between the second condenser and the compressor.

[0019] In one of the embodiments, the electroplating sludge drying device further includes a heat exchanger, and the heat exchanger is respectively connected to the compressor and the evaporator.

[0020] In one of the embodiments, the electroplating sludge drying device further includes a stirring assembly, and the stirring assembly includes a driving member and a stirring blade. The driving member is installed on the hopper, and the output end of the driving member is fixedly connected to the stirring blade.

[0021] In one of the embodiments, the stirring blade is provided with a plurality of through holes arranged at intervals.

[0022] A sludge treatment device comprises the electroplating sludge drying device described in any one of the above embodiments.

[0023] Compared with the prior art, the present invention has at least the following advantages:

[0024] 1. In the above-mentioned electroplating sludge drying device, the compressor works to compress the refrigerant so that the refrigerant heats the second pipe when passing through the first condenser, and cools the first pipe when passing through the evaporator. The first condenser heats the gas in the second pipe, so that the high-temperature gas enters the air inlet of the hopper after being blown by the centrifugal fan, so that the sludge temperature in the hopper is increased. At this time, the moisture in the sludge is mixed with the gas and blown out through the air outlet. The humid gas is cooled and condensed by the evaporator in the first pipe and is discharged as condensed water, thereby realizing the dehydration and drying of the sludge. The contact area between the sludge in the hopper and the high-temperature gas is wider, so that the drying rate is faster.

[0025] 2. In the above-mentioned electroplating sludge drying device, the first pipe and the second pipe are respectively arranged corresponding to the regenerator, that is, the first pipe and the second pipe are respectively connected to the regenerator, and the regenerator exchanges heat between the return air (hotter gas) blown out of the first pipe and the evaporator outlet air (colder gas), thereby reducing the temperature of the gas entering the evaporator and increasing the temperature of the gas entering the first condenser, which can effectively utilize the waste heat generated in the drying process, reduce energy consumption, and thus reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of an electroplating sludge drying device according to an embodiment;

[0028] Figure 2 for Figure 1 Another structural schematic diagram of the electroplating sludge drying device shown;

[0029] Figure 3 for Figure 1 The schematic diagram of the structure of the stirring blade of the electroplating sludge drying device shown;

[0030] Figure 4 for Figure 1 Another schematic diagram of the structure of the stirring blades of the electroplating sludge drying device shown;

[0031] Figure 5 for Figure 1 Another structural schematic diagram of the electroplating sludge drying device is shown. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] The present disclosure provides an electroplating sludge drying device, comprising a hopper, a centrifugal fan and an energy-saving drying component, wherein the interior of the hopper is used to accommodate sludge, the hopper is provided with an air inlet and an air outlet, the centrifugal fan is connected to the air inlet, the energy-saving drying component comprises a first condenser, an evaporator, a regenerator, a compressor, a first pipeline and a second pipeline, the first pipeline is connected to the air outlet, the evaporator is arranged corresponding to the first pipeline, the evaporator is used to cool the gas in the first pipeline, the first condenser is arranged corresponding to the second pipeline, the first condenser is used to heat the gas in the second pipeline, the first pipeline and the second pipeline are respectively arranged corresponding to the regenerator, the regenerator is used to perform heat exchange between the high-temperature gas in the first pipeline and the low-temperature gas in the second pipeline; the compressor is respectively connected to the first condenser and the evaporator, the compressor is used to compress the refrigerant to introduce the high-pressure normal-temperature gaseous refrigerant into the first condenser, and to inhale the low-pressure high-temperature liquid refrigerant generated by the evaporator.

[0036] In the electroplating sludge drying device, the compressor works to compress the refrigerant so as to heat the refrigerant through the first condenser and cool the refrigerant through the evaporator. The first condenser heats the gas in the second pipe so that the high-temperature gas enters the air inlet of the hopper after being blown by the centrifugal fan, so that the temperature of the sludge in the hopper increases. At this time, the moisture in the sludge is mixed with the gas and blown out through the air outlet. The wet gas is cooled and condensed by the evaporator in the first pipe and discharged as condensed water, thereby achieving dehydration and drying of the sludge. The contact area between the sludge and the high-temperature gas in the hopper is relatively wide, so that the drying rate is relatively fast. Since the first pipe and the second pipe are respectively arranged corresponding to the regenerator, that is, the first pipe and the second pipe are respectively connected to the regenerator, the regenerator exchanges heat between the return air (hotter gas) blown out of the first pipe and the outlet air (colder gas) of the evaporator, thereby reducing the temperature of the gas entering the evaporator and increasing the temperature of the gas entering the first condenser. The waste heat generated during the drying process can be effectively utilized to reduce energy consumption and thus reduce production costs.

[0037] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0038] like Figure 1As shown, an electroplating sludge drying device 10 of an embodiment includes a hopper 100, a centrifugal fan 200 and an energy-saving drying component 300. The interior of the hopper 100 is used to accommodate sludge. The hopper 100 is provided with an air inlet 110 and an air outlet 120. The centrifugal fan 200 is connected to the air inlet 110. The energy-saving drying component 300 includes a first condenser 310, an evaporator 320, a heat regenerator 330, a compressor 340, a first pipeline 300a and a second pipeline 300b. The first pipeline 300a is connected to the air outlet 120. The evaporator 320 is arranged corresponding to the first pipeline 300a. The evaporator 320 is used to cool the gas in the first pipeline 300a. The first condenser 310 is arranged corresponding to the second pipeline 300b, and the first condenser 310 is used to heat the gas in the second pipeline 300b. The first pipeline 300a and the second pipeline 300b are respectively arranged corresponding to the regenerator 330, and the regenerator 330 is used to exchange heat between the high-temperature gas in the first pipeline 300a and the low-temperature gas in the second pipeline 300b; the compressor 340 is respectively connected to the first condenser 310 and the evaporator 320, and the compressor 340 is used to compress the refrigerant to introduce high-pressure room-temperature gaseous refrigerant into the first condenser 310, and to inhale the low-pressure and high-temperature liquid refrigerant generated by the evaporator 320.

[0039] In this embodiment, after the device is started, the compressor 340 and the centrifugal fan 200 start to work, the compressor 340 works to compress the refrigerant to pass through the first condenser 310 for heating, and the refrigerant passes through the evaporator 320 for cooling, the compressor 340 introduces high-pressure normal-temperature gaseous refrigerant to the first condenser 310, and the first condenser 310 causes the high-pressure normal-temperature gaseous refrigerant to release heat to form medium-temperature and medium-pressure liquid refrigerant, and the released heat causes the gas in the second pipe 300b to heat up, and the high-temperature gas in the second pipe 300b is blown by the centrifugal fan 200 Then, it enters the hopper 100 through the air inlet 110. The hopper 100 contains electroplating sludge. The high-temperature gas increases the temperature in the hopper 100. At this time, the temperature of the electroplating sludge also increases, so that the water in the electroplating sludge is evaporated. The humid gas enters the first pipe 300a through the air outlet. At this time, the evaporator 320 makes the medium-temperature and medium-pressure liquid refrigerant absorb heat to form a low-pressure and high-temperature liquid refrigerant. The heat of the gas in the first pipe 300a is absorbed to form low-temperature gas, so that the water in the first pipe 300a condenses to form condensed water and is discharged, completing the drying process. The electroplating sludge is in contact with the high-temperature gas over a large area in the hopper 100, so that the temperature of the electroplating sludge is rapidly increased, and then the water is discharged, so that the drying rate of the electroplating sludge is faster.

[0040] Furthermore, the first pipe 300a and the second pipe 300b are respectively arranged corresponding to the regenerator 330, that is, the first pipe 300a and the second pipe 300b are respectively connected to the regenerator 330, and the regenerator 330 exchanges heat between the return air of the first pipe 300a, that is, the high-temperature gas, and the outlet air of the second pipe 300b, that is, the low-temperature gas, so that the temperature of the gas entering the evaporator 320 is reduced, and the temperature of the gas entering the condenser is increased, which can effectively utilize the waste heat generated in the drying process, reduce energy consumption, and thus reduce production costs.

[0041] In the electroplating sludge drying device 10, the compressor 340 works to compress the refrigerant, so that the refrigerant passes through the first condenser 310 for heating, and the refrigerant passes through the evaporator 320 for cooling. The first condenser 310 heats the gas in the second pipe 300b, so that the high-temperature gas passes through the centrifugal fan 200 and enters the air inlet 110 of the hopper 100, so that the sludge temperature in the hopper 100 is increased. At this time, the moisture in the sludge is mixed with the gas and blown out through the air outlet. The humid gas is condensed by the evaporator 320 in the first pipe 300a and then discharged as condensed water, thereby achieving the dehydration and drying of the sludge, and the sludge is dried. The contact area between the sludge and the high-temperature gas in the bucket 100 is relatively wide, so that the drying rate is relatively fast; since the first pipe 300a and the second pipe 300b are respectively arranged corresponding to the regenerator 330, that is, the first pipe 300a and the second pipe 300b are respectively abutted against the regenerator 330, the regenerator 330 exchanges heat between the return air (hotter gas) blown out of the first pipe 300a and the outlet air (colder gas) of the evaporator 320, thereby reducing the temperature of the gas entering the evaporator 320 and increasing the temperature of the gas entering the condenser, which can effectively utilize the waste heat generated during the drying process, reduce energy consumption, and thus reduce production costs.

[0042] like Figure 1 As shown, in one embodiment, a throttle valve 340a is provided in the pipeline between the compressor 340 and the evaporator 320. In this embodiment, the throttle valve 340a is an expansion valve. The compressor 340 compresses the medium-temperature and high-pressure liquid refrigerant into the expansion valve. The liquid refrigerant becomes low-temperature and low-pressure wet steam after throttling by the expansion valve. Then the refrigerant absorbs heat in the evaporator 320 to achieve a cooling effect. The expansion valve controls the valve flow rate through the change of the superheat at the end of the evaporator 320 to prevent the insufficient utilization of the evaporator 320 area and the knocking phenomenon.

[0043] like Figure 1As shown, in one embodiment, the electroplating sludge drying device 10 further includes a filter 400, which is installed in the first pipe 300a and is respectively connected to the air outlet 120 and the evaporator 320. It can be understood that after the electroplating sludge in the hopper 100 is dried at high temperature, dust and impurities are generated, and the humid gas drives the dust and impurities into the first pipe 300a, and then enters the filter 400 from the first pipe 300a. The filter 400 filters the dust and impurities to achieve the effect of purifying the gas.

[0044] In one embodiment, the evaporator 320 is provided with a drain port (not shown), and the drain port is used to discharge the condensed water. It can be understood that after the humid gas enters the evaporator 320 through the first pipe 300a, the medium-temperature medium-pressure refrigerant is compressed and enters the evaporator 320, so that the evaporator 320 performs refrigeration, that is, the medium-temperature medium-pressure refrigerant absorbs heat to cool the high-temperature humid gas in the first pipe 300a into low-temperature gas, and at the same time, the moisture in the high-temperature humid gas is condensed into condensed water, and the condensed water is discharged through the drain port.

[0045] like Figure 1 As shown, in one embodiment, the electroplating sludge drying device 10 further includes a second condenser 500, one end of the second condenser 500 is connected to the compressor 340, and the other end of the second condenser 500 is connected to the first condenser 310. It can be understood that the second condenser 500 is connected to the first condenser 310 through a pipeline. In order to improve the temperature increase rate in the hopper 100, the first condenser 310 and the second condenser 500 can be matched, that is, the compressor 340 compresses the refrigerant into the first condenser 310 and the second condenser 500 respectively, and the first condenser 310 and the second condenser 500 perform heating to generate high-temperature gas. The high-temperature gas of the second condenser 500 enters the second pipeline 330b of the first condenser 310 through the pipeline, and finally enters the hopper 100 after being blown by the centrifugal fan 200, thereby improving the temperature increase rate of the hopper 100. When the temperature in the hopper 100 reaches a preset value, the second condenser 500 can be controlled to be closed, and only the first condenser 310 can be kept started, so as to stabilize the temperature in the hopper 100, thereby reducing energy consumption.

[0046] like Figure 1As shown, in one embodiment, a one-way valve 510 is provided between the second condenser 500 and the first condenser 310, and a solenoid valve 520 is provided between the second condenser 500 and the compressor 340. In this embodiment, when the device is started, the solenoid valve 520 is opened, and the compressor 340 compresses the refrigerant into the first condenser 310 and the second condenser 500 respectively, so that the first condenser 310 and the second condenser 500 are heated, and the high-temperature gas generated by the second condenser 500 flows into the second pipe 330b of the first condenser 310 through the one-way valve 510, so that the temperature in the hopper 100 rises rapidly. When the temperature in the hopper 100 rises to a preset range, the solenoid valve 520 is closed, so that the second condenser 500 stops working, and only the first condenser 310 is retained to reduce energy consumption.

[0047] like Figure 1 As shown, in one embodiment, the electroplating sludge drying device 10 further includes a heat exchanger 600, and the heat exchanger 600 is respectively connected to the compressor 340 and the evaporator 320. In this embodiment, the compressor 340 compresses the refrigerant through the heat exchanger 600, and the heat exchanger 600 transfers heat to the refrigerant, so that the refrigerant enters the evaporator 320 and then refrigerates, that is, the heat is pre-transferred to the refrigerant through the heat exchanger 600, thereby improving energy utilization and saving energy consumption.

[0048] like Figure 2As shown, in one embodiment, the electroplating sludge drying device 10 further includes a stirring assembly 700, and the stirring assembly 700 includes 710 and a stirring blade 720, and the 710 is installed in the hopper 100, and the output end of the 710 is fixedly connected to the stirring blade 720. It can be understood that the electroplating sludge is conveyed into the hopper 100. Since the electroplating sludge is accumulated in the hopper 100, the surface electroplating sludge has a wider contact area with the high-temperature gas, and the temperature rises faster, so that the water evaporates faster. When the water content of the electroplating sludge on the surface evaporates, the water content of the electroplating sludge on the bottom layer is still relatively high. Therefore, after a period of high-temperature drying, the electroplating sludge on the bottom layer needs to be turned over to the surface. In this embodiment, 710 includes a horizontal driving member 711, a vertical driving member 712 and a rotating driving member 713. The horizontal driving member 711 is installed on the hopper 100, the vertical driving member 712 is installed on the power output end of the horizontal driving member 711, the rotating driving member 713 is installed on the output end of the horizontal driving member 711, and the stirring blade 720 is fixedly connected to the output end of the rotating driving member 713. After the electroplating sludge is dried at high temperature for a preset time, the vertical driving member 712 first drives the rotating driving member 713 to descend, so that the stirring blade 720 contacts the electroplating sludge, and then the rotating driving member 713 drives the electroplating sludge to rotate, so that the electroplating sludge at the bottom layer and the electroplating sludge at the surface layer are turned over, so that the electroplating sludge at the bottom layer is turned over to the surface layer, and then the horizontal driving member 711 drives the vertical driving member 712 to move horizontally, so that the stirring blade 720 also moves horizontally, and then the electroplating sludge at different positions in the hopper 100 is turned over. Furthermore, the vertical driving member 712, the horizontal driving member 711 and the flipping member 710 are all motors.

[0049] In one embodiment, a plurality of through holes (not shown) are provided at intervals on the stirring blade 720. It is understood that the electroplating sludge has a certain hardness after drying for a period of time, that is, it is no longer in a fluid state, but in a block state. When the stirring blade 720 contacts the electroplating sludge, the stirring blade 720 stirs and turns the electroplating sludge. When the electroplating sludge is stirred and turned, it passes through the through holes on the stirring blade 720, so that the block electroplating sludge is dispersed, that is, the electroplating sludge is broken up, so that the area where the sludge contacts the gas is wider, and the sludge drying rate is higher.

[0050] It is understandable that the electroplating sludge becomes lumps after drying for a period of time. At this time, the water on the outer surface of the lumps is evaporated, but the inner layer of the lumps is covered by the outer layer, and the water in the inner layer needs a long time to evaporate completely. Therefore, in order to increase the drying rate of electroplating sludge, such as Figure 3As shown, in one embodiment, the stirring blade 720 includes a blade body 721, a plurality of upper dispersing teeth 722 and a plurality of lower dispersing teeth 723, a through hole is opened in the blade body 721, a plurality of upper dispersing teeth 722 are arranged at intervals on the upper surface of the blade body 721, a plurality of lower dispersing teeth 723 are arranged at intervals on the lower surface of the blade body 721, the blade body 721 is connected to the output end of the rotating driving member 713, and the plurality of upper dispersing teeth 722 are staggered relative to the blade body 721 and the plurality of lower dispersing teeth 723. In the present embodiment, the blade body 721, the upper dispersing teeth 722 and the lower dispersing teeth 723 are an integrally formed structure, so that the structural strength between the blade body 721, the upper dispersing teeth 722 and the lower dispersing teeth 723 is higher. When the rotating driving member 713 drives the blade body 721 to rotate, the upper dispersing teeth 722 and the lower dispersing teeth 723 rotate together, and the upper dispersing teeth 722, the lower dispersing teeth 723 and the blade body 721 stir the block sludge together. Moreover, since the plurality of upper dispersing teeth 722 and the plurality of lower dispersing teeth 723 are staggered relative to the blade body 721, that is, each upper dispersing tooth 722 is staggered with the corresponding lower dispersing tooth 723, the vortex intensity formed when the upper dispersing teeth and the lower dispersing teeth are stirred is more intense, that is, the vortex has a stronger force on the block sludge, thereby making the block sludge more dispersed, thereby increasing the contact area between the sludge and the gas and improving the drying rate of the electroplating sludge.

[0051] Furthermore, in order to make the stirring blade 720 have a better dispersion effect on the block sludge, as Figure 3 As shown, in one embodiment, multiple upper dispersing teeth 722 are all obliquely disposed on the upper surface of the blade body 721, and multiple lower dispersing teeth 723 are all obliquely disposed on the lower surface of the blade body 721, and the inclination direction of the upper dispersing teeth 722 is opposite to the inclination direction of the lower dispersing teeth 723. In the present embodiment, the upper dispersing teeth 722 are obliquely arranged on the upper surface of the blade body 721, and the inclination angle is a first preset angle, for example, the first preset angle is 45°, and the lower dispersing teeth 723 are obliquely arranged on the lower surface of the blade body 721, and the inclination angle is a second preset angle, the second preset angle is 45°, and the inclination direction of the upper dispersing teeth 722 is opposite to the inclination direction of the lower dispersing teeth 723, so that when the upper dispersing teeth 722 and the lower dispersing teeth 723 rotate, the upper dispersing teeth 722 and the lower dispersing teeth 723 form vortices with different rotation directions. For example, when the upper dispersing teeth 722 rotate, a clockwise rotating upward vortex is formed, and the lower dispersing teeth 723 form a counterclockwise rotating downward vortex. The two vortices in different directions have a stronger force on the sludge, so that the stirring effect on the sludge is better, and the dispersion effect on the sludge is better, thereby making the contact area between the sludge and the gas larger, thereby improving the drying rate.

[0052] Furthermore, sludge is prone to generate gas when stirred at high temperature. In order to quickly discharge the gas in the sludge and increase the drying rate, Figure 4 As shown, in one embodiment, the upper dispersing teeth 722 include a plurality of first upper dispersing teeth 7221 and a plurality of second upper dispersing teeth 7222, a second upper dispersing tooth 7222 is provided between each two adjacent first upper dispersing teeth 7221, and each second upper dispersing tooth 7222 is provided with a first sludge dispersing hole 722a; the lower dispersing teeth 723 include a plurality of first lower dispersing teeth 7231 and a plurality of second lower dispersing teeth 7232, a second upper dispersing tooth 7222 is provided between each two adjacent first lower dispersing teeth 7231, and each second lower dispersing tooth 7232 is provided with a second sludge dispersing hole 723a. In this embodiment, the second upper dispersing teeth 7222 are all provided with first sludge dispersing holes 722a, and the second upper dispersing teeth 7222 are located between the two first upper dispersing teeth 7221, that is, the first sludge dispersing holes 722a are provided every other dispersing tooth, so that the upper dispersing teeth 722 form more eddy paths during stirring, thereby enhancing the turbulence intensity, and having a stronger force on the sludge, making the sludge easier to disperse, and the gas generated by the sludge during stirring can pass through the first sludge dispersing holes 722a, so that the gas and water inside the sludge can be quickly released. Similarly, the second lower dispersing teeth 7232 are all provided with second sludge dispersing holes 723a, and the second upper dispersing teeth 7222 are located between the two first lower dispersing teeth 7231, that is, the second sludge dispersing holes 723a are provided every other dispersing tooth, so that the gas and water inside the sludge stirred by the lower dispersing teeth 723 can be quickly released, and the sludge can be easily dispersed. In addition, the first sludge dispersion hole 722a and the second sludge dispersion hole 723a are also used to refine the sludge when the sludge passes through, so that the sludge particle size of the sludge is reduced, thereby increasing the gap between the sludge particles of the sludge. Under the action of high-intensity turbulence, the thermal molecular movement of the high-temperature gas and water in the sludge is more intense, making it easier for the high-temperature gas and water in the sludge to separate from the sludge, making it easier to release more high-temperature gas and water in the sludge, thereby effectively improving the drying effect of the sludge.

[0053] Furthermore, electroplating sludge is obtained after electroplating wastewater is precipitated, and contains a large amount of heavy metals, such as gold, silver, copper, iron, cobalt, nickel and other metals. In order to improve the recycling rate of heavy metals and reduce the subsequent heavy metal recycling process, some metals can be recycled when the sludge is stirred. Figure 4As shown, in one embodiment, the stirring blade 720 also includes a plurality of first magnetic sheets 723 and a plurality of second magnetic sheets, each of the first magnetic sheets 723 is respectively connected to the upper dispersion teeth 722, and each of the second magnetic sheets is respectively connected to the lower dispersion teeth 723. In this embodiment, the first magnetic sheet 723 and the second magnetic sheet are magnets with magnetism. The first magnetic sheet 723 is connected to the surface of the upper dispersion teeth 722, and the second magnetic sheet is connected to the surface of the lower dispersion teeth 723. When the stirring blade 720 is rotating, some heavy metals in the electroplating sludge, such as iron, cobalt, nickel, etc., can be magnetically absorbed and then attached to the surface of the first magnetic sheet 723 and the second magnetic sheet. When the sludge is dried, the metal can be removed from the surface of the first magnetic sheet 723 and the second magnetic sheet to facilitate the cascade recovery of the metal.

[0054] Furthermore, in order to improve the convenience of metal recycling, such as Figure 4 As shown, in one embodiment, the first magnetic sheet 723 is detachably connected to the upper dispersion teeth 722 , and the second magnetic sheet is detachably connected to the lower dispersion teeth 723 . In this embodiment, the upper dispersing tooth 722 is provided with a first clamping column 722b, the first magnetic sheet 723 is provided with a first clamping groove, the first clamping column 722b is clamped in the first clamping groove, the first clamping column 722b is provided with a threaded structure, and the first magnetic sheet 723 is locked with the upper dispersing tooth 722 by bolts; the lower dispersing tooth 723 is provided with a second clamping column, the second magnetic sheet is provided with a second clamping groove, the second clamping column is clamped in the second clamping groove, the second clamping column is provided with a threaded structure, and the second magnetic sheet is locked with the lower dispersing tooth 723 by bolts, so that the first magnetic sheet 723 and the upper dispersing tooth 722 are detachably connected, and the second magnetic sheet is detachably connected with the lower dispersing tooth 723. When the sludge is dried, the first magnetic sheet 723 and the second magnetic sheet are removed respectively to facilitate the recovery of metals on the first magnetic sheet 723 and the second magnetic sheet.

[0055] The present application also provides a sludge treatment device, comprising the electroplating sludge drying device 10 described in any of the above embodiments.

[0056] Compared with the prior art, the present invention has at least the following advantages:

[0057] 1. In the electroplating sludge drying device 10, the compressor 340 works to compress the refrigerant so as to heat the refrigerant through the first condenser 310 and cool the refrigerant through the evaporator 320. The first condenser 310 heats the gas in the second pipe 300b, so that the high-temperature gas enters the air inlet 110 of the hopper 100 after being blown by the centrifugal fan 200, so that the sludge temperature in the hopper 100 is increased. At this time, the moisture in the sludge is mixed with the gas and blown out through the air outlet. The humid gas is condensed by the evaporator 320 in the first pipe 300a and then discharged as condensed water, thereby realizing the dehydration and drying of the sludge. In addition, the contact area between the sludge in the hopper 100 and the high-temperature gas is wider, so that the drying rate is faster.

[0058] 2. In the electroplating sludge drying device 10, the first pipe 300a and the second pipe 300b are respectively arranged corresponding to the regenerator 330, that is, the first pipe 300a and the second pipe 300b are respectively connected to the regenerator 330, and the regenerator 330 exchanges heat between the return air (hotter gas) blown out of the first pipe 300a and the outlet air (colder gas) of the evaporator 320, so that the temperature of the gas entering the evaporator 320 is reduced and the temperature of the gas entering the condenser is increased, which can effectively utilize the waste heat generated in the drying process, reduce energy consumption, and thus reduce production costs.

[0059] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be subject to the attached claims.

Claims

1. An electroplating sludge drying device, characterized in that: include: A hopper, wherein the interior of the hopper is used to contain sludge, and the hopper is provided with an air inlet and an air outlet; a centrifugal fan, the centrifugal fan being in communication with the air inlet; An energy-saving drying component, the energy-saving drying component comprises a first condenser, an evaporator, a regenerator, a compressor, a first pipeline and a second pipeline, the first pipeline is communicated with the air outlet, the evaporator is arranged corresponding to the first pipeline, the evaporator is used to cool the gas in the first pipeline, the first condenser is arranged corresponding to the second pipeline, the first condenser is used to heat the gas in the second pipeline, the first pipeline and the second pipeline are respectively arranged corresponding to the regenerator, and the regenerator is used to perform heat exchange between the high-temperature gas in the first pipeline and the low-temperature gas in the second pipeline; and, The compressor is connected to the first condenser and the evaporator respectively, and is used to compress the gas refrigerant to introduce high-pressure room-temperature gas refrigerant into the first condenser, and to absorb low-pressure and high-temperature gas liquid refrigerant generated by the evaporator.

2. The electroplating sludge drying device according to claim 1, characterized in that: A throttle valve is provided on the pipeline between the compressor and the evaporator.

3. The electroplating sludge drying device according to claim 1, characterized in that: The electroplating sludge drying device also includes a filter, which is installed on the first pipeline and is connected to the air outlet and the evaporator respectively.

4. The electroplating sludge drying device according to claim 1, characterized in that: The evaporator is provided with a drain port, and the drain port is used to drain condensed water.

5. The electroplating sludge drying device according to claim 1, characterized in that: The electroplating sludge drying device also includes a second condenser, one end of the second condenser is connected to the compressor, and the other end of the second condenser is connected to the first condenser.

6. The electroplating sludge drying device according to claim 5, characterized in that: A one-way valve is provided between the second condenser and the first condenser, and a solenoid valve is provided between the second condenser and the compressor.

7. The electroplating sludge drying device according to claim 1, characterized in that: The electroplating sludge drying device also includes a heat exchanger, which is connected to the compressor and the evaporator respectively.

8. The electroplating sludge drying device according to claim 1, characterized in that: The electroplating sludge drying device also includes a stirring component, which includes a driving component and a stirring blade. The driving component is installed on the hopper, and the output end of the driving component is fixedly connected to the stirring blade.

9. The electroplating sludge drying device according to claim 8, characterized in that: The stirring blade is provided with a plurality of through holes arranged at intervals.

10. A sludge treatment equipment, characterized in that: It comprises the electroplating sludge drying device described in any one of claims 1 to 9.

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