CN113295038A

CN113295038A - Injecting double-cone low-consumption rotational flow sewage heat recovery anti-blocking device

Info

Publication number: CN113295038A
Application number: CN202110633628.5A
Authority: CN
Inventors: 倪龙; 宋涛; 史国正; 姚杨
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-08-24

Abstract

A low-consumption rotational flow sewage heat recovery anti-blocking device with an injection double cone relates to a sewage filtering and separating device. Cylinder cavity shell and cone cavity shell constitute the cyclone separator, the top center sets up the sewage overflow mouth, the top edge sets up the sewage inlet tube, the bottom sets up sewage underflow mouth, interior cylinder is fixed inside the cyclone separator, design according to cyclone separator's zero axial speed envelope surface, the heat recovery subassembly encloses to close to fix outside the cyclone separator, sewage outlet pipe one end and sewage overflow mouth upper end intercommunication, sewage underflow mouth and the adjacent position intercommunication of sewage outlet pipe other end, the heat exchanger is installed at sewage outlet pipe intermediate position, and through two takeovers and heat recovery subassembly intercommunication, the heat exchanger is equipped with clear water entry and clear water export. The cyclone separation decontamination method is adopted and the inner cone is added, so that the energy consumption is reduced, the efficiency is improved, and the heat exchanger and the heat recovery assembly are operated in series, so that the heat loss of sewage is reduced.

Description

Injecting double-cone low-consumption rotational flow sewage heat recovery anti-blocking device

Technical Field

The invention relates to a sewage filtering and separating device, in particular to an injection double-cone low-consumption rotational flow sewage heat recovery anti-blocking device, and belongs to the technical field of sewage treatment.

Background

At present, the annual discharge amount of urban sewage in China is about 466476 billion cubic meters, the temperature is generally maintained at 11-14 ℃, and the air conditioner has great utilization value, wherein the heating area for the air conditioner exceeds 5 billion square meters. If the heat energy in the sewage is utilized, the building energy consumption and the carbon emission of primary energy are greatly reduced. The sewage source heat pump air conditioning system can recycle part of low-level heat energy in sewage and is used for heating in winter or refrigerating in summer.

However, the easy filth blockage of the sewage heat exchanger is the biggest challenge in the application of the sewage source heat pump, and the continuous operation of the sewage source heat pump system is restricted. The main source of plugging and scaling is the large amount of solid impurities of various constituents in the wastewater. The traditional sewage filtering and decontamination and the heat exchanger dirt wiping are separately and independently carried out, and the machine needs to be stopped for cleaning regularly, so that the efficiency is low, and the maintenance cost is high. Therefore, the traditional sewage filtering and decontamination mode needs to be optimized, the traditional sewage filtering and decontamination mode can be better combined with a heat exchanger, the problems of blockage and scaling are effectively solved, and meanwhile, the sewage heat loss in the separation process is reduced, so that the method has important significance for fully utilizing the sewage heat energy.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the injection double-cone low-consumption rotational flow sewage heat recovery and resistance prevention device, which adopts a rotational flow separation and decontamination method and adds an inner cone at a zero axial speed enveloping surface, thereby reducing the separation energy consumption, improving the separation efficiency, enabling a heat exchanger and a heat recovery assembly to operate in series, being simple and reasonable, and reducing the sewage heat loss in the sewage decontamination treatment link.

In order to achieve the purpose, the invention adopts the following technical scheme: an injection double-cone low-consumption rotational flow sewage heat recovery anti-blocking device comprises a rotational flow separator consisting of a cylinder cavity shell and a cone cavity shell coaxially communicated and fixed at the bottom of the cylinder cavity shell, wherein a sewage overflow port is vertically arranged at the center of the top of the cylinder cavity shell, a sewage inlet pipe is arranged at the edge of the top of the cylinder cavity shell along the tangential direction, a sewage underflow port is arranged at the bottom of the cone cavity shell, the injection double-cone low-consumption rotational flow sewage heat recovery device further comprises an inner cone, a sewage outlet pipe, a heat recovery assembly and a heat exchanger, the inner cone is coaxially fixed in the rotational flow separator at intervals through a fixing fin, the opening at the upper end of the inner cone is not higher than the lower end of the sewage overflow port, the inner cone is designed according to the zero-axial-speed enveloping surface of the rotational flow separator, the heat recovery assembly is provided with a closed cavity and fixed outside the rotational flow separator in a surrounding manner, one end of the sewage outlet pipe is communicated and arranged with the upper end of the sewage overflow port, the sewage underflow port is communicated with the position adjacent to the other end of the sewage outlet pipe, the heat exchanger is installed in the middle of the sewage outlet pipe, the heat exchanger is communicated with the heat recovery assembly through two connecting pipes, and the heat exchanger is provided with a clean water inlet and a clean water outlet.

Compared with the prior art, the invention has the beneficial effects that:

1. the traditional sewage filtering and decontamination and the heat exchanger dirt wiping are separately and independently carried out, the efficiency of the filtering and decontamination stage is low, if the filter screen is too dense, the filtering energy consumption is large, and if the filter screen is too sparse, fine solid impurities are easy to leak out of the screen;

2. the cyclone separator is provided with the inner cone at the zero axial speed enveloping surface, so that the violent turbulence caused by transition of inner and outer cyclone can be weakened, the separation energy consumption is reduced, and the separation efficiency is improved;

3. according to the invention, the heat recovery assembly is arranged outside the cyclone separator, the heat exchanger and the heat recovery assembly are connected in series for operation, the device structure and the water circulation pipeline are simple and reasonable, and the sewage heat loss in the sewage decontamination treatment link is reduced.

Drawings

FIG. 1 is a schematic structural view of the injection double-cone low-consumption rotational flow sewage heat recovery and resistance prevention device of the invention.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in figure 1, the low-consumption rotational flow sewage heat recovery anti-blocking device comprises a rotational flow separator, an inner cone 3, a sewage outlet pipe 7, a heat recovery assembly 9 and a heat exchanger 10, wherein the rotational flow separator consists of a cylinder cavity shell 1 and a cone cavity shell 2 coaxially communicated and fixed at the bottom of the cylinder cavity shell, a sewage overflow port 5 is vertically arranged at the center of the top of the cylinder cavity shell 1, the sewage overflow port 5 is a tubular shape with the lower end extending into the cylinder cavity shell 1 and the upper end remaining outside the cylinder cavity shell 1, a sewage inlet pipe 4 is arranged at the edge of the top of the cylinder cavity shell 1 along the tangential direction, the number of the sewage inlet pipes 4 is more than or equal to one, the sewage inlet pipes 4 are arranged around the top of the cylinder cavity shell 1 at equal angles when the number of the sewage inlet pipes is more than one, the shapes of the sewage inlet pipes 4 are not limited and can be circular pipes, rectangular pipes or irregular pipes, the sewage inlet pipe 4 can also be provided with an inclination angle in the tangential direction of the top edge of the cylinder cavity shell 1, so that the outer side end of the sewage inlet pipe 4 is higher than the inner side end, the bottom of the cone cavity shell 2 is provided with a sewage underflow port 6, the inner cone 3 is coaxially fixed inside the cyclone separator through a fixed wing 8 at intervals, the upper end opening of the inner cone 3 is not higher than the lower end of the sewage overflow port 5, the cross-sectional area of the fixed wing 8 is as small as possible, the number of the fixed wing 8 is as small as possible under the condition of meeting the installation strength so as to avoid strong interference on the flow of internal fluid, the inner cone 3 has the same cone angle with the cone cavity shell 2 according to the design of a zero axial speed envelope surface of the cyclone separator, the heat recovery component 9 is provided with a closed cavity and is fixed outside the cyclone separator in a surrounding manner without influencing the connection of the sewage inlet pipe 4, the sewage overflow port 5 and the sewage underflow port 6 with the outside, the sewage treatment device is characterized in that one end of the sewage outlet pipe 7 is communicated with the upper end of the sewage overflow port 5, the sewage underflow port 6 is communicated with the position adjacent to the other end of the sewage outlet pipe 7, the heat exchanger 10 is installed in the middle of the sewage outlet pipe 7 and is suitable for being a plate heat exchanger, the heat exchanger 10 is communicated with the heat recovery assembly 9 through two connecting pipes, and the heat exchanger 10 is provided with a clean water inlet 11 and a clean water outlet 12.

The whole body has two flow paths of sewage and clear water, wherein the sewage flows through a sewage inlet pipe 4, a cylinder cavity shell 1, a cone cavity shell 2, an inner cone 3, a sewage overflow port 5, a heat exchanger 10 and a sewage outlet pipe 7, and when the sewage contains solid impurities, the solid impurities are discharged from a sewage underflow port 6; clear water flows through the clear water inlet 11, the heat exchanger 10, the heat recovery assembly 9 and the clear water outlet 12, because sewage generates heat in the separation process of the cyclone separator, and then enters the heat exchanger 10 through the sewage overflow port 5, the temperature of the sewage after the clear water flows through the heat recovery assembly 9 to absorb heat is higher than that of the sewage in the heat exchanger 10, the clear water flowing through the heat exchanger 10 and then entering the heat recovery assembly 9 can absorb the heat dissipation in the separation process, and then the clear water flows out from the clear water outlet 12 to be supplied to a heat user after absorbing heat in the clear water reflowing heat exchanger 10, so that the heat loss of the sewage in the traditional sewage decontamination treatment link is reduced.

This scheme is through installing the interior cone 3 of the zero-axis-speed envelope surface design according to cyclone additional, can weaken interior whirl and the outer whirl circulation and transition the turbulence of twining the arousing, including the rotation of cone 3 with higher speed inside fluid, compare and can effectively reduce the separation power consumption in traditional cyclone, promote separation efficiency, the frictional heating of rotatory separation process and to cyclone outside heat dissipation absorb through heat recovery subassembly 9, heat recovery subassembly 9 links to each other with heat exchanger 10, absorb the clear water after the heat dissipation of sewage separation process and flow through heat exchanger 10, further absorb the low-order heat energy in the sewage. As most of solid impurities in the sewage flowing through the heat exchanger 10 are separated, the blockage and scaling degree of the sewage on the heat exchanger 10 are greatly reduced, and the long-term stable operation of the equipment is facilitated. The sewage without most solid impurities flows through the heat exchanger 10 to release heat and then flows through the sewage underflow port 6, so that the solid impurities flowing out of the sewage underflow port 6 can be washed and ejected, and the solid impurities are carried to return to a sewage pipe network, and the aims of temporarily separating dirt and extracting heat from purified water are fulfilled.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an draw bipyramid low-consumption whirl sewage heat recovery and prevent hindering device, includes the cyclone who comprises cone cavity shell (2) fixed in its bottom by cylinder cavity shell (1) and coaxial intercommunication, cylinder cavity shell (1) top center is vertical to be provided with sewage overflow mouth (5), and cylinder cavity shell (1) top edge is provided with sewage inlet tube (4) along tangent direction, cone cavity shell (2) bottom is provided with sewage underflow mouth (6), its characterized in that: the heat recovery anti-blocking device further comprises an inner cone (3), a sewage outlet pipe (7), a heat recovery assembly (9) and a heat exchanger (10), wherein the inner cone (3) is coaxially fixed inside the cyclone separator at intervals through a fixing fin (8), an opening in the upper end of the inner cone (3) is not higher than the lower end of the sewage overflow port (5), the inner cone (3) is designed according to a zero-axial-speed enveloping surface of the cyclone separator, the heat recovery assembly (9) is provided with a closed cavity and is enclosed and fixed outside the cyclone separator, one end of the sewage outlet pipe (7) is communicated with the upper end of the sewage overflow port (5), the sewage underflow port (6) is communicated with the other end of the sewage outlet pipe (7), the heat exchanger (10) is installed in the middle position of the sewage outlet pipe (7), and the heat exchanger (10) is communicated with the heat recovery assembly (9) through two connecting pipes, the heat exchanger (10) is provided with a clean water inlet (11) and a clean water outlet (12).

2. The device for preventing heat recovery of sewage by injecting double cones and low-consumption rotational flow according to claim 1 is characterized in that: the number of the sewage inlet pipes (4) is more than or equal to one, and when the number of the sewage inlet pipes (4) is more than one, the sewage inlet pipes are arranged around the top of the column cavity shell (1) at equal angles.

3. The injection double-cone low-consumption rotational flow sewage heat recovery anti-blocking device according to claim 1 or 2, characterized in that: an inclined angle is reserved in the top edge tangent direction of the column cavity shell (1) of the sewage inlet pipe (4), so that the outer side end of the sewage inlet pipe (4) is higher than the inner side end.

4. The device for preventing heat recovery of sewage by injecting double cones and low-consumption rotational flow according to claim 1 is characterized in that: the heat exchanger (10) is a plate heat exchanger.