A sludge jet crushing device

Abstract

The present application provides a sludge jet crushing device. In the device, a feed port, an air inlet and a discharge port are arranged on the shell, the air inlet and the discharge port are arranged relatively at the two ends of the shell, and the feed port is located between the air inlet and the discharge port; a first cavity and a second cavity are arranged inside the shell, the feed port is connected to the first cavity, the air inlet is connected to the second cavity, the first cavity and the second cavity intersect, and a discharge port is arranged at the intersection; the first nozzle is inserted into the first cavity, and the air flow outlet of the first nozzle is close to the feed port, which is used to spray air flow into the first cavity. In this way, the problems of sludge adhesion and crushing failure under mechanical crushing are effectively avoided; the tearing and crushing of high-water content solid materials such as sludge is achieved, creating conditions for its further drying and water removal, improving the heat and mass transfer rate of further drying, and reducing the energy consumption of drying.

Description

Technical Field

[0001] The present application relates to the technical field of sludge disposal, and in particular to a sludge jet crushing device. Background Art

[0002] With the development of economy and society and the gradual increase of urbanization rate, the amount of sewage and sludge generated has increased year by year. As a byproduct of sewage treatment, sludge is enriched with pollutants from the original sewage, including heavy metals, bacteria, viruses and other harmful substances, and has a high water content. Most of the water exists in the form of interstitial water, capillary water, cell water, etc., and it is difficult to remove the water. Due to the high water content of sludge, how to reduce the energy consumption of treatment is the key to promoting the reduction, harmlessness and resource utilization of sludge.

[0003] Different technological measures are adopted for sludge disposal according to the stage of water reduction. After being treated with different technological measures to reduce the water content of sludge to about 55%-65%, energy drying is adopted to further reduce the water content of sludge. This is a commonly adopted technological measure to adapt to the characteristics of water in sludge. How to reduce the energy consumption of thermal drying treatment is the main problem faced by energy drying treatment.

[0004] Sludge treated by different process measures to a moisture content of about 55%-65% has the characteristics of agglomeration, adhesion, and large particle size. After entering the drying device, the contact area with the hot air is small, the heat and mass transfer is slow, and the drying energy consumption is high. If the traditional mechanical crushing method is adopted, the stickiness of the sludge will make the crushing device ineffective and fail to achieve the purpose of reducing the particle size of the sludge particles. Summary of the invention

[0005] The purpose of the present application is to provide a sludge jet crushing device to solve or alleviate the problems existing in the above-mentioned prior art.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The present application provides a sludge jet breaking device, comprising: a shell, on which is provided a feed port, an air inlet and a discharge port, the air inlet and the discharge port are relatively arranged at two ends of the shell, and the feed port is located between the air inlet and the discharge port; a first cavity and a second cavity are arranged inside the shell, the feed port is connected with the first cavity, the air inlet is connected with the second cavity, the first cavity and the second cavity intersect, and the discharge port is arranged at the intersection; a first nozzle, the first nozzle is inserted into the first cavity, and the airflow outlet of the first nozzle is close to the feed port, which is used to spray airflow into the first cavity.

[0008] Preferably, the intersection of the first cavity and the second cavity to the discharge port is a conical cavity, wherein the conical cavity has an upper side wall inclined downward, and the upper side wall extends from the first cavity to the discharge port.

[0009] Preferably, the sludge jet breaking device also includes: a second nozzle, which is located at the intersection of the first cavity and the second cavity, close to the upper side wall of the conical cavity, and located in the extension direction of the first cavity, and is used to spray air flow toward the inner wall of the intersection of the first cavity and the second cavity.

[0010] Preferably, the first nozzle is inserted into the first cavity along a first direction and sprays airflow along the first direction; the second nozzle is inserted into the shell along a second direction and sprays airflow along the second direction; wherein the first direction is the extension direction of the first cavity, and the second direction is perpendicular to the first direction.

[0011] Preferably, there are multiple groups of the second nozzles, and the multiple groups of the second nozzles are arranged on the shell. Each group of the second nozzles includes two second nozzles, and the axes of the two second nozzles in each group coincide.

[0012] Preferably, the air flow outlet of the first nozzle is equipped with a jet nozzle; and / or, the air flow outlet of the second nozzle is equipped with the jet nozzle; wherein, the jet nozzle is provided with an air flow tapering inlet and a throat in sequence along the extension direction of the first nozzle, the throat is a straight pipe section, and the air flow tapering inlet to the throat is in a tapering trumpet shape.

[0013] Preferably, the jet nozzle is provided with a diffuser, and the diffuser is connected to the tail end of the throat, and the diffuser is in a gradually expanding mouth shape; wherein, the gradually expanding mouth cone angle of the diffuser is smaller than the trumpet mouth cone angle of the gradually converging airflow inlet, and the diameter of the diffuser is smaller than the diameter of the gradually converging airflow inlet.

[0014] Preferably, the first nozzle is synchronized with the feeding of the feeding port and continuously sprays airflow, and the second nozzle sprays airflow continuously or intermittently.

[0015] Preferably, there are a plurality of the first nozzles, and the plurality of the first nozzles are arranged in parallel and equidistantly in the horizontal direction and / or the vertical direction.

[0016] Preferably, the air entering the air inlet is hot air with a temperature higher than the ambient temperature.

[0017] The technical solution provided by the present invention has the following beneficial effects:

[0018] In the technical solution provided in the present application, the sludge treated to a moisture content of about 55% to 65% by different process measures enters the jet crushing device and is crushed by the airflow ejected through the first nozzle, especially the jet nozzles of different specifications and sizes spray to produce sonic or even supersonic high-speed airflow. Under the action of the huge speed difference, the sludge particles are torn and crushed, and the high-speed airflow carries the crushed sludge to the intersection of the first cavity and the second cavity; the hot air from the air inlet is mixed with the crushed sludge particles in the first cavity and the second cavity, and is carried out of the jet crushing device through the discharge port and enters the subsequent drying device or system.

[0019] The sludge particles enter the first cavity and are torn and broken by the high-speed airflow that fills the cavity, so that the sludge particles become extremely small and the specific surface area becomes larger; furthermore, the contact area between the sludge particles and the drying hot air increases, the heat and mass transfer efficiency of the particles is improved, the drying energy consumption is reduced, and the drying energy consumption is saved.

[0020] As the sludge particles become smaller and have a larger specific surface area after being torn and broken, the surface of the sludge particles is quickly dried once in contact with the hot air. The sludge particles whose surfaces are quickly dried lose their stickiness, thus avoiding the phenomenon of sludge sticking to the wall in subsequent drying devices.

[0021] The sludge particles broken by the first nozzle can be further broken by the second nozzle to further reduce the sludge particles and avoid the possible adhesion of sludge particles to the wall. The second nozzle can also spray intermittently to break and clean the wall-adherent materials, that is, clean the wall-adherent materials and break the wall-adherent materials.

[0022] In summary, the jet crushing device avoids the problems of sludge sticking and crushing failure under mechanical crushing methods; it realizes the tearing and crushing of high-water content solid materials such as sludge, creates conditions for its further drying and moisture removal, improves the heat and mass transfer rate of further drying, and reduces the energy consumption of drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. Among them:

[0024] Figure 1 A schematic diagram of the structure of a sludge jet crushing device provided according to some embodiments of the present application;

[0025] Figure 2 for Figure 1 A cross-sectional view of the sludge jet breaking device of the illustrated embodiment along a first direction;

[0026] Figure 3 A schematic cross-sectional view of a jet nozzle provided according to some embodiments of the present application.

[0027] Description of reference numerals:

[0028] 101, housing; 102, first nozzle; 103, second nozzle; 104, jet nozzle;

[0029] 111, feed port; 121, air inlet; 131, discharge port; 141, first cavity; 151, second cavity; 114, air flow gradually converging inlet; 124, throat; 134, diffusion port. DETAILED DESCRIPTION

[0030] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as a part of an embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present application includes such modifications and variations within the scope of the appended claims and their equivalents.

[0031] In the description of this application, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and do not require that this application must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. The terms "connected", "connected", and "set" used in this application should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] like Figures 1 to 3As shown, the sludge jet crushing device includes: a shell 101, a first nozzle 102 and a second nozzle 103. The shell 101 is provided with a feed port 111, an air inlet 121 and a discharge port 131, the air inlet 121 and the discharge port 131 are arranged at two ends of the shell 101, and the feed port 111 is located between the air inlet 121 and the discharge port 131; the shell 101 is provided with a first cavity 141 and a second cavity 151, the feed port 111 is communicated with the first cavity 141, the air inlet 121 is communicated with the second cavity 151, the first cavity 141 and the second cavity 151 intersect, and the discharge port 131 is arranged at the intersection. The first nozzle 102 is inserted into the first cavity 141, and the airflow outlet of the first nozzle 102 is close to the feed port 111, which is used to spray airflow into the first cavity 141. Specifically, the first nozzle 102 and the feed port 111 feed synchronously and continuously.

[0033] The cavity inside the housing 101 is divided into a first cavity 141 and a second cavity 151 arranged in parallel in the vertical direction by a partition, the first cavity 141 is connected to the feed port 111; the second cavity 151 is connected to the air inlet 121, and the discharge port 131 is arranged at the intersection of the first cavity 141 and the second cavity 151. In this way, the sludge entering from the feed port 111 is broken up in the first cavity 141 by the high-pressure airflow sprayed by the first nozzle 102, the particle size of the sludge particles is reduced, the specific surface area of ​​the sludge is increased, and the sludge entering from the feed port 111 is effectively prevented from falling into the second cavity 151 and affecting the air intake effect.

[0034] In the embodiment of the present application, the feed port 111 is arranged in the vertical direction, which is conducive to the sludge entering the first cavity 141 from the feed port 111; the internal cavity of the shell 101 is divided by a partition to form a first cavity 141 and a second cavity 151 arranged vertically in parallel. Among them, one end of the partition located in the shell 101 is suspended in the air, and at the suspended end of the partition, the first cavity 141 and the second cavity 151 intersect. Here, it should be noted that the first nozzle 102 is located at one end of the first cavity 141 away from the suspended end of the partition, and extends from the outside of the first cavity 141 into the first cavity 141, and sprays a compressed airflow of not less than 0.3MPa to the sludge entering from the feed port 111 to crush the entering sludge.

[0035] In the embodiment of the present application, the air inlet 121 and the discharge port 131 are connected to the second cavity 151, and the extension direction from the air inlet 121 to the discharge port 131 is the same as the airflow injection direction of the first nozzle 102. Further, the first nozzle 102 is inserted into the first cavity 141 along the first direction, and the airflow is injected along the first direction. Here, the first direction is the extension direction of the first cavity 141. It should be noted that the first direction is also the extension direction from the air inlet 121 to the discharge port 131, that is, the extension direction of the first cavity 141 and the second cavity 151, and the airflow injection direction of the first nozzle 102 are the same, all of which are the first direction. Thereby, after the compressed airflow injected by the first nozzle 102 crushes the sludge, it is beneficial to utilize the airflow flow in the first cavity 141 and the second cavity 151 to send the crushed sludge to the discharge port 131.

[0036] In the embodiment of the present application, the air inlet 121 and the discharge port 131 are arranged relatively at the two ends of the housing 101. Specifically, the air inlet 121 and the discharge port 131 are arranged along the first direction and are located at the two ends of the housing 101, and the discharge port 131 is located at the lower part of the first cavity 141. Thereby, after the sludge is crushed in the first cavity 141, it falls downward under the action of its own gravity during the movement process and is transported to the discharge port 131.

[0037] In the embodiment of the present application, the sludge treated by different process measures to have a moisture content of about 55% to 65% enters the sludge jet crushing device through the feed port 111, and is crushed by the airflow ejected through the first nozzle 102, especially the jet crushing nozzles of different specifications and sizes generate sonic or even supersonic high-speed airflow. Under the action of the huge speed difference, the sludge particles are torn and crushed by the high-speed airflow entering the first cavity 141, and the crushed sludge is carried by the high-speed airflow to the first cavity 141 and the second cavity 151 for mixing, and is taken out of the jet crushing device through the discharge port 131 and enters the subsequent drying device or system.

[0038] In some optional embodiments, the intersection of the first cavity 141 and the second cavity 151 to the discharge port 131 is a conical cavity; the conical cavity has an upper side wall inclined downward, and the upper side wall extends from the first cavity 141 to the discharge port 131. Specifically, in the conical cavity, the second cavity 151 to the outlet is a straight line, and the first cavity 141 to the outlet is a downward-inclined cone (upper side wall), thereby, under the premise of ensuring that the energy of the airflow entering from the air inlet 121 is not wasted or lost, the airflow ejected from the first nozzle 102 along the first direction is guided to the outlet through the downward-inclined upper side wall, thereby forming an effective conveying guide for the crushed sludge.

[0039] In some optional embodiments, the sludge jet breaking device further includes: a second nozzle 103, the second nozzle 103 is located at the intersection of the first cavity 141 and the second cavity 151, close to the upper side wall of the conical cavity, and located in the extension direction of the first cavity 141, and is used to spray airflow toward the inner side wall of the intersection of the first cavity 141 and the second cavity 151. Specifically, the second nozzle 103 sprays airflow continuously or intermittently.

[0040] In the embodiment of the present application, the second nozzle 103 is inserted into the housing 101 along the second direction and sprays airflow along the second direction. The first direction and the second direction are both horizontal directions, and the first direction and the second direction are perpendicular to each other; the airflow spraying direction of the second nozzle 103 is perpendicular to the airflow spraying direction of the first nozzle 102. Thus, by inserting the first nozzle 102 into the first cavity 141 along the first direction and spraying airflow along the first direction, on the one hand, the high-pressure airflow sprayed by the first nozzle 102 does not change direction in the first nozzle 102, which further improves the energy utilization efficiency of the high-pressure airflow sprayed by the first nozzle 102 and avoids the energy loss caused by the transportation of the high-pressure airflow; on the other hand, the airflow spraying direction of the first nozzle 102 is consistent with the airflow direction of the air inlet 121, which avoids the mutual interference between the airflow from the first cavity 141 to the discharge port 131 and the airflow from the second cavity 151 to the discharge port 131; at the same time, the airflow in the first cavity 141 and the airflow in the second cavity 151 form a synergistic effect to transport the sludge to the discharge port 131.

[0041] In the embodiment of the present application, the axis of the first nozzle 102 is located in the middle of the first cavity 141 in the vertical direction, the second nozzle 103 is arranged close to the upper side wall of the conical cavity, and the end of the partition that divides the shell 101 into the first cavity 141 and the second cavity 151 does not exceed the connection between the upper side wall of the conical cavity and the first cavity 141. In this way, while ensuring that the shell 101 is divided into the first cavity 141 and the second cavity 151 that do not interfere with each other, secondary crushing of sludge and effective cleaning of sludge adhering to the wall are achieved.

[0042] In the embodiment of the present application, the second nozzle 103 is located in the conical cavity and close to the upper side wall of the conical cavity. Thus, on the one hand, the airflow sprayed by the first nozzle 102 can fully crush the sludge in the first cavity 141; on the other hand, secondary crushing of the crushed sludge is formed to further reduce the particle size of the sludge and avoid possible wall adhesion of sludge particles; at the same time, the mutual interference between the airflow sprayed by the second nozzle 103 and the airflow sprayed by the first nozzle 102 is reduced, effectively improving the crushing effect of the sludge.

[0043] In the embodiment of the present application, the first nozzle 102 is arranged close to the feed port 111, so that the high-pressure airflow ejected by the first nozzle 102 can immediately impact and crush the sludge entering the first cavity 141, thereby improving the energy utilization efficiency of the high-pressure airflow when jet-crushing the sludge.

[0044] In the embodiment of the present application, there are multiple groups of the second nozzles 103, and the multiple groups of the second nozzles 103 are arranged on the housing 101. Each group of the second nozzles 103 includes two second nozzles 103, and the axes of the two second nozzles 103 in each group coincide. Thus, by arranging the two second nozzles 103 on both sides of the housing 101 relatively, and the axes of the two second nozzles 103 coincide. On the one hand, by the two second nozzles 103 being arranged relatively and spraying airflows in opposite directions, the sludge is crushed under the action of two opposite airflows, further improving the crushing effect of the sludge; on the other hand, by the oppositely arranged second nozzles 103 spraying airflows in opposite directions, the sludge on the opposite side walls of the first cavity 141 can be effectively cleaned, further improving the cleaning effect of the first cavity 141, and preventing the sludge from forming blockage in the crushing cavity.

[0045] In the embodiment of the present application, the second nozzle 103 is inserted along the second direction at the intersection of the first cavity 141 and the second cavity 151, so that the airflow ejected by the second nozzle 103 and the airflow ejected by the first nozzle 102 are perpendicular to each other, so that the sludge crushed by the first nozzle 102 is further crushed under the action of the airflow ejected by the second nozzle 103, and the sludge that is crushed by the first nozzle 102 and adheres to the inner wall of the first cavity 141 can be cleaned, blown off from the inner wall of the first cavity 141, and moved to the outlet under the joint action of the first nozzle 102 and the second nozzle 103. In this way, the sludge is crushed for the second time and the inner wall of the cavity is cleaned by the second nozzle 103.

[0046] In some optional embodiments, a jet nozzle 104 is installed at the air flow outlet of the first nozzle 102; and / or, the jet nozzle 104 is installed at the air flow outlet of the second nozzle 103; wherein, the jet nozzle 104 is provided with an air flow tapering inlet 114 and a throat 124 in sequence along the extension direction of the first nozzle 102, the throat 124 is a straight pipe section, and the air flow tapering inlet 114 to the throat 124 is in a tapered trumpet shape.

[0047] In the embodiment of the present application, the airflow in the first nozzle 102 enters from the relatively large-diameter airflow tapering inlet 114. Since the airflow tapering inlet 114 and the throat 124 are in a trumpet-shaped shape with a gradually decreasing cross-section, the airflow is continuously accelerated between the airflow injection wellhead and the throat 124, so that the injection speed of the airflow is continuously improved.

[0048] In a specific example, the jet nozzle 104 further has a diffuser 134, and the diffuser 134 is connected to the tail end of the throat 124, and the diffuser 134 is in a gradually expanding mouth shape; wherein, the mouth cone angle of the diffuser 134 is smaller than the trumpet mouth cone angle of the airflow gradually converging inlet 114, and the diameter of the diffuser 134 is smaller than the diameter of the airflow gradually converging inlet 114.

[0049] In the embodiment of the present application, the airflow gradually narrowing inlet 114 to the throat 124 and the throat 124 to the diffuser 134 are all in a trumpet shape. Here, in order to increase the effective area of ​​the jet airflow on the sludge entering from the feed port 111, the diameter of the diffuser 134 is appropriately increased, so that the jet area of ​​the airflow that has been continuously accelerated is continuously increased when it is ejected from the throat 124 to the diffuser 134. In this way, under the premise of ensuring that the jet airflow has high speed and high energy, the sludge has a larger crushing area and the crushing efficiency of the sludge is improved.

[0050] It should be noted that the jet nozzles 104 of different specifications and sizes can generate high-pressure airflows of different speeds, for example, subsonic, sonic or supersonic high-pressure airflows.

[0051] In a specific example, a jet nozzle 104 is installed at the air flow outlet of the first nozzle 102 to spray a compressed air flow of not less than 0.3 MPa toward the sludge entering from the feed port 111, thereby crushing the incoming sludge and forming an air flow in the first cavity 141 that flows toward the discharge port 131, thereby transporting the crushed sludge to the discharge port 131.

[0052] In another specific example, a jet nozzle 104 is installed at the air flow outlet of the second nozzle 103, which intermittently sprays a compressed air flow of not less than 0.3 MPa to the sludge moving toward the discharge port 131, so as to crush and clean the sludge adhering to the inner wall of the first cavity 141 and blow it off the inner wall of the first cavity 141, thereby cleaning the wall and crushing the wall-adhering material, thereby effectively avoiding cavity blockage caused by sludge adhering to the inner wall.

[0053] In another specific example, the air flow outlets of the first nozzle 102 and the second nozzle 103 are both equipped with jet nozzles 104. The sludge entering from the feed port 111 is crushed for the first time through the first nozzle 102, and the crushed sludge is transported to the discharge port 131. The sludge crushed by the first nozzle 102 is crushed for the second time through the second nozzle 103, so as to further reduce the particle size of the sludge particles, increase the specific surface area, and effectively avoid the adhesion of the sludge. At the same time, it can reduce the adhesion of the sludge to the inner wall, and prevent the sludge from clogging the first cavity 141.

[0054] In a specific example, the distance between the airflow gradually contracting inlet 114 and the throat 124 is smaller than the distance between the throat 124 and the diffuser 134. At the same time, since the diameter of the airflow gradually contracting inlet 114 is larger than the diameter of the diffuser 134, the airflow can be effectively accelerated when it passes from the airflow gradually contracting inlet 114 to the throat 124, meeting the requirements of high-pressure injection.

[0055] In some optional embodiments, there are multiple first nozzles 102, and the multiple first nozzles 102 are arranged in parallel and equidistantly in the horizontal direction and / or vertical direction. When the first nozzles 102 are arranged in multiple rows in the vertical direction, the multiple first nozzles 102 in each row are arranged in parallel and equidistantly, and the nozzles in two adjacent rows are arranged in a staggered manner, thereby effectively improving the crushing effect of the airflow sprayed by the first nozzle 102 on the sludge entering the sludge crushing device.

[0056] In some optional embodiments, the air inlet 121 is hot air with a temperature higher than the ambient temperature. As a result, the sludge particles are torn and broken by the high-speed airflow that fills the cavity, and the sludge particles become extremely small, with a larger specific surface area, and the contact area between the sludge particles and the drying hot air increases, thereby improving the heat and mass transfer efficiency of the particles, reducing the drying energy consumption, and saving the drying energy consumption. Here, since the sludge particles become smaller and have an increased specific surface area after being torn and broken, once they come into contact with the hot air, the surface of the sludge particles is quickly dried, and the sludge particles whose surfaces are quickly dried lose their stickiness, thereby avoiding the sludge sticking to the wall phenomenon in the subsequent drying device.

[0057] The sludge jet crushing device provided in the embodiment of the present application avoids the problems of sludge sticking and crushing failure under mechanical crushing methods; it can process the sludge after dehydration and before drying, and crush the sludge, thereby realizing the tearing and crushing of high-water content solid substances such as sludge, creating conditions for its further drying and water removal, making the subsequent drying process more efficient, effectively improving the heat and mass transfer rate of further drying, and reducing the energy consumption of drying.

[0058] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sludge jet crushing device, characterized in that: include: A shell, wherein a feed port, an air inlet and a discharge port are arranged on the shell, the air inlet and the discharge port are arranged at two ends of the shell relatively, and the feed port is located between the air inlet and the discharge port; a first cavity and a second cavity are arranged inside the shell, the feed port is communicated with the first cavity, the air inlet is communicated with the second cavity, the first cavity and the second cavity intersect, and the discharge port is arranged at the intersection; a first nozzle, the first nozzle is inserted into the first cavity, and the air flow outlet of the first nozzle is close to the feed port, and is used to spray air flow into the first cavity; There are a plurality of the first nozzles, and the plurality of the first nozzles are arranged in parallel and equidistantly in the horizontal direction and / or the vertical direction; The air entering the air inlet is hot air with a temperature higher than that of the ambient environment.

2. The sludge jet crushing device according to claim 1 is characterized in that: The intersection of the first cavity and the second cavity to the discharge port is a conical cavity; the conical cavity has an upper side wall inclined downward, and the upper side wall extends from the first cavity to the discharge port.

3. The sludge jet crushing device according to claim 2 is characterized in that: The sludge jet breaking device also includes: a second nozzle, which is located at the intersection of the first cavity and the second cavity, close to the upper side wall of the conical cavity, and located in the extension direction of the first cavity, and is used to spray air flow toward the inner wall of the intersection of the first cavity and the second cavity.

4. The sludge jet crushing device according to claim 3 is characterized in that: The first nozzle is inserted into the first cavity along a first direction and sprays airflow along the first direction; the second nozzle is inserted into the shell along a second direction and sprays airflow along the second direction; wherein the first direction is the extension direction of the first cavity, and the second direction is perpendicular to the first direction.

5. The sludge jet crushing device according to claim 3 is characterized in that: There are multiple groups of the second nozzles, which are arranged on the shell. Each group of the second nozzles includes two second nozzles, and the axes of the two second nozzles in each group coincide.

6. The sludge jet crushing device according to claim 3, characterized in that: The air flow outlet of the first nozzle is equipped with a jet nozzle; and / or, The jet nozzle is installed at the air flow outlet of the second nozzle; The jet nozzle is provided with a gradually converging airflow inlet and a throat in sequence along the extension direction of the first nozzle, the throat is a straight pipe section, and the airflow gradually converging inlet to the throat is in a gradually converging trumpet shape.

7. The sludge jet crushing device according to claim 6, characterized in that: The jet nozzle also has a diffuser, and the diffuser is connected to the tail end of the throat, and the diffuser is in a gradually expanding shape; wherein the mouth cone angle of the diffuser is smaller than the trumpet mouth cone angle of the airflow gradually converging inlet, and the diameter of the diffuser is smaller than the diameter of the airflow gradually converging inlet.

8. The sludge jet crushing device according to claim 3, characterized in that: The first nozzle is synchronized with the feeding of the feeding port and continuously sprays airflow, and the second nozzle sprays airflow continuously or intermittently.

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