CN217763512U

CN217763512U - Heating and back-spraying system for landfill leachate

Info

Publication number: CN217763512U
Application number: CN202221156052.4U
Authority: CN
Inventors: 张筠; 张�林; 张慎之
Original assignee: Lianyungang Wanda Power Station Auxiliary Equipment Co ltd
Current assignee: Lianyungang Wanda Power Station Auxiliary Equipment Co ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-11-08
Anticipated expiration: 2032-05-16

Abstract

A landfill leachate heating and back-spraying system comprises a back-spraying system and a heating system, wherein the back-spraying system comprises a leachate collecting tank and a leachate back-spraying pipeline, one end of the leachate back-spraying pipeline is arranged in the leachate collecting tank and is fixedly communicated with a submersible sewage pump, and the other end of the leachate back-spraying pipeline extends to an inlet of an external garbage bin; the heating system comprises a leachate filter and a leachate flue gas heater which are installed on the leachate back-spraying pipeline, the leachate flue gas heater comprises a heating shell, a heating cavity and a plurality of oval heating pipes which run through the heating cavity are arranged in the heating shell, the heating cavity is fixedly communicated with a flue gas input pipeline and a flue gas output pipeline which are communicated with an external boiler flue, and the oval heating pipes are all connected in series on the leachate back-spraying pipeline. This application can improve the initial temperature of rubbish, increases economic benefits, improves the generating efficiency, guarantees the economic steady operation of msw incineration power plant.

Description

Heating and back-spraying system for landfill leachate

Technical Field

The utility model relates to a refuse treatment technical field, in particular to a refuse leachate heating and back-spraying system.

Background

At present, can produce a large amount of rubbish in people's production and life, in order to carry out resource recycling, the rubbish of production generally can be sent into the garbage bin and concentrate incineration disposal, generate electricity, in some areas that the temperature is lower, the rubbish temperature that supplies the burning is also lower, can influence the msw incineration operation, can increase garbage bin heating system for this reason, however, current garbage bin heating system generally adopts the fuel to carry out combustion-supporting, because the combustibility of rubbish is relatively poor, it is combustion-supporting to need a large amount of fuel, economic benefits is poor, the generating efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art not enough, provide one kind and can improve rubbish initial combustion temperature, practice thrift fuel, reduce cost's rubbish leachate heating back and spout the system.

The technical problem to be solved by the utility model is realized through the following technical scheme. The utility model relates to a rubbish leachate heating and back-spraying system, including back-spraying system and heating system, back-spraying system includes leachate collecting tank and leachate return-spraying pipeline, leachate return-spraying pipeline's one end sets up in leachate collecting tank, and fixed intercommunication has the submersible sewage pump, leachate return-spraying pipeline's the other end extends to the entrance of outside garbage storehouse, heating system includes leachate filter and leachate flue gas heater installed on leachate return-spraying pipeline, leachate flue gas heater includes the heating shell, be provided with heating chamber and a plurality of oval heating pipes that run through the heating chamber setting in the heating shell, heating chamber fixed intercommunication has flue gas input pipeline and flue gas output pipeline that communicate with outside boiler flue, oval heating pipe all establishes ties on leachate return-spraying pipeline; a return pipe is fixedly communicated with the communicated position of the leachate return spray pipe and the external garbage bin, the other end of the return pipe extends into the leachate collection pool, and a return control valve is installed on the return pipe.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above rubbish leachate heating back spray system, still install the pressure gauge in leachate back spray pipe way and the leachate back spray pipe way of the intercommunication department in outside rubbish storehouse, backflow control valve sets up with the pressure gauge linkage.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above rubbish leachate heating return and spout the system, the end fixing intercommunication that the pipeline was spouted back to the leachate in leachate collecting pit department has 2 stealthily dirty pumps that mutually independent set up.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above rubbish leachate heating return system of spouting, the end fixing intercommunication that the pipeline was spouted to the leachate of outside garbage storehouse department has 2-5 leachate to spray the pipeline, all installs on every leachate spray the pipeline and sprays the control valve.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above rubbish leachate heating returns the system of spouting, all installs the atomizer on every leachate spray line.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above rubbish leachate heating return spraying system, the leachate filter all includes the filter tank and dismantles the formula and install the filter screen in the filter tank.

The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above rubbish leachate heating back spray system, all be provided with the drain at every oval heating pipe, the drain is sealed through sealed lid.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the leachate flue gas heater is arranged on the leachate return spraying pipeline, so that the leachate is heated by the boiler flue gas and then sprayed to the garbage bin, the heat value of the garbage meets the requirement of incineration, the auxiliary fuel consumption is reduced, and the economic benefit is good;

2. the heating pipe of the leachate flue gas heater has an elliptical light pipe design structure, so that the heating effect of the landfill leachate is ensured, the resistance is small, and the operation noise is favorably reduced;

3. the utility model provides a leachate filter adopts 316 stainless steel materials to make, and whole filter screen can be torn open and wash, has both reduced leachate gas heater's scale deposit, avoids atomizer to take place to block up again.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a garbage leachate heating and back-spraying system comprises a back-spraying system and a heating system, wherein the back-spraying system comprises a leachate collecting tank 1 and a leachate back-spraying pipe 2, one end of the leachate back-spraying pipe 2 is arranged in the leachate collecting tank 1 and is fixedly communicated with a submersible sewage pump 3, the submersible sewage pump 3 is made of stainless steel and is used for outputting garbage leachate in the leachate collecting tank 1 into the leachate back-spraying pipe 2, preferably, the end of the leachate back-spraying pipe 2 at the leachate collecting tank 1 is fixedly communicated with 2 submersible sewage pumps 3 which are independently arranged, so that the garbage leachate can be conveniently used for one-by-one use or used at the same time, and the reliability of garbage leachate output is ensured;

the other end of the leachate recycling pipeline 2 extends to an inlet of an external garbage bin, the heating system comprises a leachate filter 4 and a leachate flue gas heater 5 which are arranged on the leachate recycling pipeline 2, the leachate filter 4 is used for filtering garbage leachate so as to remove particles in the garbage leachate, and the influence on the normal operation of the subsequent leachate flue gas heater 5 and the spraying operation of the garbage leachate is avoided, the leachate flue gas heater 5 comprises a heating shell, a heating cavity and a plurality of elliptical heating pipes 6 which penetrate through the heating cavity are arranged in the heating shell, a flue gas input pipeline and a flue gas output pipeline which are communicated with an external boiler flue are fixedly communicated on the heating cavity, and the elliptical heating pipes 6 are all connected on the leachate recycling pipeline 2 in series; the leachate flue gas heater 5 is used for heating the garbage leachate by utilizing flue gas in an external boiler flue, thereby realizing the recovery of heat of the flue gas and improving the temperature of the garbage leachate; the design of the elliptical heating pipe 6 is beneficial to reducing the resistance to the flue gas input into the heating cavity and reducing the running noise, meanwhile, compared with a round pipe, the elliptical heating pipe 6 has a large heat exchange area and a small flow resistance in the pipe, and is beneficial to improving the heat exchange effect, and meanwhile, the surface of the elliptical heating pipe 6 is designed to be a smooth surface, so that the surface of the pipe body is less in dust deposition, and the influence on the heat conduction effect is avoided;

a return pipeline 7 is fixedly communicated at the communication part of the leachate recirculation pipeline 2 and the external garbage bin, the other end of the return pipeline 7 extends into the leachate collecting tank 1, and the return pipeline 7 is used for conveying part of the leachate into the leachate collecting tank 1 from a new place when the spraying pressure is too high due to excessive leachate conveyed by the leachate recirculation pipeline 2 so as to reduce the pressure and ensure the safety; the backflow pipeline 7 is provided with a backflow control valve 8 for controlling the on-off of the backflow pipeline 7, preferably, the leachate backflow pipeline 2 at the communication position of the leachate backflow pipeline 2 and the external garbage bin is further provided with a pressure gauge 9, the backflow control valve 8 and the pressure gauge 9 are arranged in a linkage mode, when the pressure gauge 9 detects that the pressure value is too large, a signal can be generated to control the backflow control valve 8 to be automatically opened, so that the backflow pipeline 7 is communicated, part of garbage leachate flows back, and the automatic control of the opening and closing of the backflow control valve 8 is realized.

The leachate spraying pipelines 10 are provided with a plurality of pipelines, so that the heated leachate can be conveniently sprayed to all positions in the garbage bin, the temperature of the garbage in the garbage bin can be comprehensively and uniformly improved, the heating efficiency can be improved, preferably, 2-5 leachate spraying pipelines 10 are fixedly communicated with the end part of the leachate spraying back pipeline 2 at the external garbage bin, each leachate spraying pipeline 10 is provided with a spraying control valve, so that the leachate spraying pipelines 10 can be mutually independently communicated, and the on-off operation of one or more leachate spraying pipelines 10 can be simultaneously carried out;

in order to improve the overall spraying of leachate in the garbage bin, each leachate spraying pipeline 10 is provided with an atomizing nozzle, so that the heated garbage leachate can be quickly, comprehensively and uniformly sprayed into the garbage bin conveniently.

Because the landfill leachate contains more impurities, the leachate filter 4 needs to be cleaned regularly, the leachate filter 4 comprises a filter box and a filter screen 11 which is detachably arranged in the filter box, the filter box and the filter screen 11 are made of 316 stainless steel materials, the leachate filter is firm and reliable, and the filter screen 11 can be integrally detached for cleaning, so that the operation is convenient.

Although the waste leachate entering the leachate heater is filtered by the leachate flue gas filter, the waste leachate is turbid and contains more particulate matters, so that a drain outlet is formed in each elliptical heating pipe 6 during actual use, the particulate matters deposited in the elliptical heating pipes 6 can be conveniently discharged, a high-pressure water gun can be conveniently used for cleaning the elliptical heating pipes 6 through the drain outlets, and the service life of the elliptical heating pipes 6 can be prolonged; the drain is sealed through sealed lid, has both guaranteed the leakproofness of drain, does not influence oval heating pipe 6's bearing pressure, makes things convenient for the maintenance again.

The configuration of the present application is as follows: the leachate heating device, the leachate filter 4, the submersible sewage pump 3, the valve bank, the spraying device, the bracket, the conveying pipeline and the like are adopted, so that leachate at the temperature of 20 ℃ is conveyed to the leachate heating device through the submersible sewage pump 3, and then the leachate at the temperature of 65 ℃ is sprayed into a garbage bin through the pipeline, and the problems of difficult control of incineration temperature and unstable garbage combustion caused by poor low-temperature fermentation effect, insufficient combustion and low thermal efficiency of the garbage are solved;

the application has the advantages that:

the garbage leachate is heated by utilizing the boiler flue gas, and the heated garbage leachate is sprayed back into the garbage bin, so that the heat recovery of the boiler flue gas is realized, the garbage leachate is treated, and meanwhile, the temperature of the garbage in the garbage bin is also increased, the garbage in the garbage bin is normally fermented, the heat value of the garbage meets the burning requirement, the consumption of auxiliary fuel is reduced, the economic benefit is increased, and the power generation efficiency is improved.

Claims

1. The utility model provides a rubbish leachate heating spouts system back which characterized in that: the system comprises a back-spraying system and a heating system, wherein the back-spraying system comprises a leachate collecting pool and a leachate back-spraying pipeline, one end of the leachate back-spraying pipeline is arranged in the leachate collecting pool and is fixedly communicated with a submersible sewage pump, and the other end of the leachate back-spraying pipeline extends to an inlet of an external garbage bin; the heating system comprises a leachate filter and a leachate flue gas heater which are arranged on the leachate return spraying pipeline, the leachate flue gas heater comprises a heating shell, a heating cavity and a plurality of oval heating pipes which penetrate through the heating cavity are arranged in the heating shell, the heating cavity is fixedly communicated with a flue gas input pipeline and a flue gas output pipeline which are communicated with an external boiler flue, and the oval heating pipes are all connected in series on the leachate return spraying pipeline; a return pipe is fixedly communicated with the communicated position of the leachate return spray pipe and the external garbage bin, the other end of the return pipe extends into the leachate collection pool, and a return control valve is installed on the return pipe.

2. The landfill leachate heating and back-spraying system of claim 1, wherein: and a pressure gauge is further installed on the leachate back-spraying pipeline at the communication position of the leachate back-spraying pipeline and the external garbage bin, and the reflux control valve is in linkage arrangement with the pressure gauge.

3. The landfill leachate heating and back-spraying system of claim 1, wherein: the end part of the leachate back-spraying pipeline at the leachate collecting pool is fixedly communicated with 2 submersible sewage pumps which are arranged independently.

4. The waste leachate heating and back-spraying system of claim 1 or 2, wherein: the end part of the leachate back-spraying pipeline at the external garbage bin is fixedly communicated with 2-5 leachate spraying pipelines, and each leachate spraying pipeline is provided with a spraying control valve.

5. The landfill leachate heating and back-spraying system of claim 3, wherein: and each leachate spraying pipeline is provided with an atomizing nozzle.

6. The landfill leachate heating and back-spraying system of claim 1, wherein: the leachate filter comprises a filter box and a filter screen which is detachably arranged in the filter box.

7. The landfill leachate heating and back-spraying system of claim 1, wherein: and each oval heating pipe is provided with a drain outlet which is sealed by a sealing cover.