CN215062108U

CN215062108U - Closed circulation flue gas-leachate heating system

Info

Publication number: CN215062108U
Application number: CN202023309869.4U
Authority: CN
Inventors: 周载勇
Original assignee: Huaxi Energy Engineering Co ltd
Current assignee: Huaxi Energy Engineering Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-12-07
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a closed circulation flue gas-filtration liquid heating system, including the rubbish pond, its characterized in that: a percolate pool is arranged below the garbage pool through a filter screen, a heat exchange tube is arranged in the percolate pool, two ends of the heat exchange tube are connected with two ends of a flue gas-water heat exchanger through pipelines, the flue gas-water heat exchanger is arranged in a flue, a circulating water pump is arranged on the pipelines, and the pipelines are connected with a constant pressure water tank; the percolate pool is connected with the garbage pool through a return pipe, and a percolate circulating pump is arranged on the return pipe; the utility model discloses not only reducible energy resource consumption, temperature rise are higher, and do not increase extra filtration liquid treatment capacity to reduce the civil engineering investment, the operation is more reliable.

Description

Closed circulation flue gas-leachate heating system

Technical Field

The utility model relates to a filtration liquid heating system, especially adopt flue gas-filtration liquid heating system of closed circulating water medium.

Background

After the garbage enters the garbage pool, the garbage incineration power plant generally needs to store and ferment for 5-7 days, and part of percolate is removed so as to improve the heat value of the garbage entering the furnace. From the fuel point of view, under the condition that the garbage fermentation tank is closed, the volatile hydrocarbon and H are generated during the fermentation process₂S and other gases are released, so that the quality of total carbon, total hydrogen and total sulfur of the garbage fed into the furnace in the process of fermentation is reduced. But the fermentation process is favorable for combustionThe organic matter of macromolecules in the garbage is decomposed into micromolecular matter, so that the oxidation in the combustion process is easier to perform, and the combustion reaction can be completed in a shorter time. Although the carbon, hydrogen and sulfur elements in the garbage are partially lost in the fermentation process, the volatile matters escaped from the carbon, hydrogen and sulfur elements in the garbage are pumped by a primary fan of a boiler and enter a hearth to participate in combustion, and the comprehensive consideration is given to that the reduction amount of water in the garbage fermentation process is large, so that the heat value of the garbage actually fed into the boiler is not reduced, but is increased. The garbage fermentation process comprises an exothermic reaction, in the fermentation process, the temperature of a natural fermentation layer rises along with the lapse of fermentation time, the temperature of the fermentation layer is generally 15-20 ℃ higher than the ambient temperature, and the rise of the temperature is beneficial to the improvement of the fermentation reaction speed. And (3) piling the garbage in front of the furnace for 48 hours at a proper temperature, so that most water in the garbage can be analyzed. Generally, the temperature in the garbage bin is high in summer, the garbage fermentation effect is good, the heat value of garbage entering the furnace is high, and the combustion in the furnace is stable. However, in winter, particularly in northern China, the temperature of the garbage is very low, the garbage is frozen and even carries ice and snow, the fermentation process is extremely unfavorable, the heat value of the garbage is reduced in the same fermentation time, if the garbage is not heated and fermented to remove percolate, a combustion-supporting system can only be put into the garbage to burn the low-heat-value garbage, so that the operation cost is greatly increased, and the generation of dioxin and other pollutants in the incineration process is also not favorably controlled.

In the prior art, the unfreezing and heating of garbage are as follows: 1, heating by adopting fuel oil; 2, heating indirectly or directly by adopting steam; 3, directly heating the boiler blow-down water; 4, measures such as introducing smoke into the garbage pool for cyclic heating are adopted; the disadvantages of the above measures are: 1, fuel oil heating is adopted to increase fuel consumption and carbon emission, and 2, steam heating is adopted to reduce the generated energy of a power plant; 3, sewage is heated, and as the total heat of the sewage is less, the temperature rise of garbage is less, and if the sewage is directly heated, the additional treatment capacity of the percolate can be increased; 4, the circulation heating of the flue gas introduced by the wall of the garbage pool increases the civil engineering quantity of the flue, is difficult to seal and arrange, and is easy to leak air in operation.

Disclosure of Invention

The utility model aims at the above-mentioned not enough of prior art, provide a closed circulation flue gas-filtration liquid heating system, it is not only reducible energy resource consumption, temperature rise higher, and does not increase extra filtration liquid handling capacity to reduce the civil engineering investment, the operation is more reliable.

In order to achieve the above object, the utility model discloses a closed circulation flue gas-filtration liquid heating system, including the rubbish pond, its characterized in that: a percolate pool is arranged below the garbage pool through a filter screen, a heat exchange tube is arranged in the percolate pool, two ends of the heat exchange tube are connected with two ends of a flue gas-water heat exchanger through pipelines, the flue gas-water heat exchanger is arranged in a flue, a circulating water pump is arranged on the pipelines, and the pipelines are connected with a constant pressure water tank; the percolate pool is connected with the garbage pool through a return pipe, and a percolate circulating pump is arranged on the return pipe;

the utility model heats the circulating water by the flue gas, heats the percolate by the circulating water, sprays the percolate into the garbage pool to unfreeze the garbage, can reduce the energy consumption and the temperature rise, recycles the percolate, does not increase the extra percolate treatment capacity, has simple device, can reduce the civil engineering investment, and has more reliable operation;

as a further improvement of the utility model, a nozzle is arranged at one end of the return pipe positioned in the garbage pool and is arranged below an unloading platform of the garbage pool; the garbage can be thawed as soon as possible without affecting the unloading;

as a further improvement of the utility model, the flue gas-water heat exchanger is arranged in the flue in front of the chimney; the temperature rise requirement can be met, and the energy is saved;

to sum up, the utility model discloses not only reducible energy resource consumption, temperature rise are higher, and do not increase extra filtration liquid treatment capacity to reduce the civil engineering investment, the operation is more reliable.

Drawings

Fig. 1 is a front view of an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the closed circulation flue gas-leachate heating system of the embodiment includes a garbage pool 1, and a leachate pool 3 disposed below the garbage pool 1 through a filter screen 2, wherein a heat exchange tube 4 is disposed in the leachate pool 3, two ends of the heat exchange tube 4 are connected to two ends of a flue gas-water heat exchanger 5 through a pipeline, the flue gas-water heat exchanger 5 is disposed in a flue 7 in front of a chimney 6, a circulation water pump 8 is disposed on the pipeline, and the pipeline is connected to a constant pressure water tank 9; the percolate pool 3 is connected with the garbage pool 1 through a return pipe 11, a percolate circulating pump 12 is arranged on the return pipe 11, a nozzle 13 is arranged at one end of the return pipe 11 positioned in the garbage pool 1, and the nozzle 13 is arranged below the unloading platform 10 of the garbage pool 1;

the utility model heats the circulating water in the flue gas-water heat exchanger 5 by the flue gas, the circulating water heats the percolate in the percolate pool 3 by the heat exchange tube 4, and the percolate is sprayed into the garbage pool 1 to unfreeze the garbage, thereby not only reducing the energy consumption and increasing the temperature rise, but also recycling the percolate without increasing the extra percolate treatment capacity, introducing the garbage pool wall for heating the flue gas flue, the device is simple, the civil engineering investment can be reduced, and the operation is more reliable; the constant-pressure water tank 9 can supplement water in time; the nozzle 13 can unfreeze the garbage as soon as possible without affecting the unloading; the temperature of the flue gas before the chimney is 140-150 ℃, and the temperature rise requirement can be met due to the fact that the total enthalpy value carried by the flue gas is high, and energy is saved.

Claims

1. The utility model provides a closed circulation flue gas-filtration liquid heating system, includes the rubbish pond, its characterized in that: a percolate pool is arranged below the garbage pool through a filter screen, a heat exchange tube is arranged in the percolate pool, two ends of the heat exchange tube are connected with two ends of a flue gas-water heat exchanger through pipelines, the flue gas-water heat exchanger is arranged in a flue, a circulating water pump is arranged on the pipelines, and the pipelines are connected with a constant pressure water tank; the percolate pool is connected with the garbage pool through a return pipe, and a percolate circulating pump is arranged on the return pipe.

2. The closed cycle flue gas-leachate heating system of claim 1, wherein: and a nozzle is arranged at one end of the return pipe, which is positioned in the garbage pool, and the nozzle is arranged below the unloading platform of the garbage pool.

3. The closed cycle flue gas-leachate heating system of claim 1, wherein: the flue gas-water heat exchanger is arranged in a flue in front of a chimney.