CN217663242U

CN217663242U - Urea preparation heating system utilizing smoke of urban household garbage incinerator

Info

Publication number: CN217663242U
Application number: CN202220974738.8U
Authority: CN
Inventors: 邢卫东; 孟祥生; 甘华强; 吴强强; 秦延召
Original assignee: Zhengzhou Dongxing Environmental Protection Energy Co ltd
Current assignee: Zhengzhou Dongxing Environmental Protection Energy Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-10-28
Anticipated expiration: 2032-04-22

Abstract

The utility model discloses an utilize urea preparation heating system of town domestic waste incinerator flue gas, including burning furnace, be provided with the economizer in burning furnace's the flue, the water inlet of economizer has the boiler through first pipeline intercommunication, the delivery port of economizer passes through the pipeline intercommunication to preparing the jar, the lower part of preparing the jar is provided with coil pipe heating device, be provided with the wet return between the export of economizer and the boiler, the export of economizer has the air feed device through second pipeline intercommunication, the air feed device passes through third pipeline and preparation jar intercommunication, and in going into the preparation jar through booster fan drum, make the urea in the preparation jar can more comprehensive withstand thermal the toasting through heating device and booster fan for urea melts and forms solution, improves pyrolysis efficiency greatly.

Description

Urea preparation heating system utilizing smoke of urban household garbage incinerator

Technical Field

The utility model relates to a urea production facility technical field especially relates to an utilize urea preparation heating system of town domestic waste incinerator flue gas.

Background

Along with the rapid development of economy and the improvement of the living standard of people, more and more domestic garbage is generated, one part of the existing domestic garbage treatment modes is to directly bury the domestic garbage through simple treatment, but the landfill method is adopted to treat the domestic garbage, so that a large amount of land space is occupied, and the pollution of underground water is also caused. And then the technology of generating power by using the heat generated by burning the garbage is adopted. The garbage incineration power generation can effectively recycle, reduce and harm the household garbage, not only fully utilizes the heat value of the garbage, but also reduces a large amount of land space occupied by the garbage.

When using to burn burning furnace to domestic waste, can produce harmful flue gas under some circumstances, contain a large amount of nitrogen oxides in the flue gas, if not discharge disasters such as control can cause air pollution and acid rain. In order to respond to the national call for energy conservation and emission reduction, various manufacturers strictly control the emission of nitrogen oxides, and mainly remove the nitrogen oxides in the boiler flue gas through flue gas denitrification reaction.

The urea pyrolysis is used as a preparation method of a commonly used denitration engineering reducing agent, and has a great operation performance, but the heat source of the currently commonly used urea pyrolysis heating mainly adopts an electric heating scheme to provide a heat source, and because the power of an electric heating device is higher, a high-voltage power supply needs to be arranged, but the electric heating method not only influences the electric power of a factory, but also has higher investment and maintenance cost, and increases extremely high production cost in the using process, and the generation mode of the whole heat source has greater potential safety hazard by using high voltage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the not enough of using electrical heating to maintain and use cost is higher among the prior art, provide an utilize urea preparation heating system of town domestic waste incinerator flue gas.

The utility model discloses a realize through following technical scheme: the urea preparation heating system comprises an incinerator, wherein an economizer is arranged in a flue of the incinerator, a water inlet of the economizer is communicated with a boiler through a first pipeline, a water outlet of the economizer is communicated to a preparation tank through a pipeline, a coil pipe heating device is arranged on the lower portion of the preparation tank, a water return pipe is arranged between an outlet of the economizer and the boiler, an outlet of the economizer is communicated with an air supply device through a second pipeline, and the air supply device is communicated with the preparation tank through a third pipeline.

Further, the preparation tank is provided in plurality, and each of the preparation tanks is independent of each other.

Further, air supply device includes the wind storehouse, the inside steam coil that is provided with of wind storehouse, steam coil and second pipeline intercommunication, steam coil below is provided with the fan.

Further, a booster fan is arranged on the third pipeline.

Further, coil pipe heating device is including setting up the lateral wall coil pipe on the preparation jar lateral wall, and set up the bottom surface coil pipe at preparation tank bottoms portion, coil pipe heating device's the outside all is provided with the insulating layer.

The beneficial effects of the utility model reside in that: the water outlet of the economizer is communicated to the preparation tank through a pipeline, the economizer enables high-temperature steam to heat the preparation tank after circularly heating through a boiler and a water return pipe, the preparation tanks are connected in parallel and are independent, the high-temperature steam coming out of the outlet of the economizer can heat the preparation tanks simultaneously when in use, the utilization rate of energy is greatly improved, the preparation tanks pyrolyze urea when in use, the production rate is greatly increased, the denitration treatment of flue gas generated by burning and producing the flue gas is more thorough, the pollution of harmful ingredients in the flue gas to the environment is greatly reduced, and the treatment effect is improved. In blowing into the preparation jar through booster fan, not only can accelerate the pyrolysis of urea, can also be for providing lasting wind pressure in the preparation jar, increase the pressure in the preparation jar, improve pyrolysis efficiency, make the urea in the preparation jar can be more comprehensive withstand thermal toasting through heating device and booster fan for urea melts the formation solution, improves pyrolysis efficiency greatly.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

wherein: 1. a flue; 101. a first pipe; 2. a coal economizer; 201. a second conduit; 3. a boiler; 4. a wind bin; 401. a booster fan; 402. a steam coil; 403. a fan; 404. a third pipeline; 5. preparing a tank; 501. a coil heating device; 502. an insulating layer.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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 efforts all belong to the protection scope of the present invention.

Example 1

As shown in fig. 1: the utility model provides an utilize urea preparation heating system of town domestic waste incinerator flue gas, including burning furnace, be provided with economizer 2 in burning furnace's the flue 1, the water inlet of economizer 2 has boiler 3 through first pipeline 101 intercommunication, it has automatic water supply device and pressure monitoring device to link to have on boiler 3, boiler 3 carries cold water to economizer 2 in through first pipeline 101 when using, economizer 2 heaies up under the effect of burning the high temperature flue gas in burning furnace flue 1, be provided with the wet return between economizer 2's export and boiler 3, heat the water in the boiler 3 through the wet return, heat up in the period, realize thermal reuse, provide the heat source for preparation jar 5, the setting of the electric heater who has saved the stage, the energy has been practiced thrift, and the production cost is reduced.

The water outlet of the economizer 2 is communicated to the preparation tank 5 through a pipeline, the economizer 2 circularly heats the preparation tank 5 through the boiler 3 and the water return pipe, meanwhile, the preparation tanks 5 are connected in parallel, each preparation tank 5 is independent, high-temperature steam coming out of the outlet of the economizer 2 can heat the preparation tanks 5 simultaneously when in use, the utilization rate of energy is greatly improved, particularly, on some incinerators with higher power, the flow of flue gas in the flue 1 is larger, more incineration heat can be generated during production and use, meanwhile, more ammonia gas is needed for carrying out denitration treatment on the flue gas, the preparation tanks 5 pyrolyze urea when in use, the production rate is greatly increased, the denitration treatment on the flue gas generated after incineration of the incinerators is more thorough, the pollution of harmful ingredients in the flue gas to the environment is greatly reduced, and the treatment effect is improved. Be provided with coil pipe heating device 501 in the lower part of preparation jar 5, coil pipe heating device 501 is including setting up the lateral wall coil pipe on the 5 lateral walls of preparation jar and setting up the bottom surface coil pipe in preparation jar 5 bottom, and coil pipe heating device 501 will prepare the bottom surface and the lateral wall surface heating of jar 5 and form the high temperature layer for urea in preparation jar 5 can be quick melt, the time is prepared in the reduction. And the urea can produce a certain amount of ammonia gas when in use, the urea capacity is mostly arranged at the lower part of the preparation tank 5, a heating coil is not arranged at the upper part of the preparation tank 5, so that heat loss is prevented, the urea solution is prevented from being solidified on the side wall of the preparation tank 5, a heat-insulating layer 502 is arranged at the outer side of the coil heating device 501, the heat-insulating layer 502 can reduce heat loss in the environment and improve the utilization rate, a booster fan 401 is arranged on a third pipeline 404, an outlet of the economizer 2 is communicated with an air supply device through a second pipeline 201, the air supply device is communicated with the preparation tank 5 through the third pipeline 404, the booster fan 401 is arranged on the third pipeline 404, the air supply device comprises an air bin 4, a steam coil 402 is arranged inside the air bin 4, the steam coil 402 is communicated with the second pipeline 201, a fan 403 is arranged below the steam coil 402, high-temperature air is generated by blowing the steam coil 402 under the action of the fan 403, the air is blown into the preparation tank 5 through the booster fan 401, the pressure of the urea can be accelerated, the continuous pyrolysis is provided for the preparation tank 5, the increase of the pyrolysis, the urea production efficiency is greatly improved, and the urea solution heating efficiency can be greatly improved by the booster fan 401.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions on some technical features, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an utilize urea preparation heating system of town domestic waste incinerator flue gas, includes the incinerator, its characterized in that: the coal-saving furnace is characterized in that a coal economizer is arranged in a flue of the incinerator, a water inlet of the coal economizer is communicated with a boiler through a first pipeline, a water outlet of the coal economizer is communicated to a preparation tank through a pipeline, a coil heating device is arranged at the lower part of the preparation tank, a water return pipe is arranged between an outlet of the coal economizer and the boiler, an outlet of the coal economizer is communicated with an air supply device through a second pipeline, and the air supply device is communicated with the preparation tank through a third pipeline.

2. The urea preparation heating system using the smoke of the urban household garbage incinerator according to claim 1, characterized in that: the preparation jar is provided with a plurality ofly, and every preparation jar is independent each other.

3. The urea preparation heating system using the smoke of the urban household garbage incinerator according to claim 1, characterized in that: the air supply device comprises an air bin, a steam coil is arranged inside the air bin, the steam coil is communicated with the second pipeline, and a fan is arranged below the steam coil.

4. The urea preparation heating system using the smoke of the urban household garbage incinerator according to claim 1, characterized in that: and a booster fan is arranged on the third pipeline.

5. The system of claim 1, which is used for preparing and heating urea by using the flue gas of the urban household garbage incinerator, and is characterized in that: the coil heating device comprises a side wall coil arranged on the side wall of the preparation tank and a bottom surface coil arranged at the bottom of the preparation tank, and heat insulation layers are arranged on the outer sides of the coil heating device.