System for heating garbage storage pit by utilizing fire exhaust steam

Abstract

The utility model discloses a system for heating a garbage storage pit by utilizing fire exhaust steam, which comprises a boiler, a steam collection box, a main steam main pipe, a steam collection box electric gate valve and a steam exhaust pipeline, and a first stop valve and a second stop valve are sequentially arranged on the steam exhaust pipeline; an inlet of the connecting pipeline is arranged between the first stop valve and the second stop valve and is communicated with the steam exhaust pipeline, a third stop valve is arranged on the connecting pipeline, and an outlet of the connecting pipeline is communicated with a garbage storage pit. The garbage storage pit is heated through steam discharged to the air in the furnace starting stage, garbage is heated through heat of the steam, waste of a large amount of steam in the furnace starting stage can be avoided, garbage fermentation can be promoted, the heat value of garbage entering the furnace can be increased, garbage combustion is stable, and garbage combustion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste incineration power generation, in particular to a system for heating a waste storage pit by using live steam exhaust. Background Technique

[0002] Similar to a thermal power plant, during the start-up process of a boiler in a waste incineration power plant, the temperature and pressure of the main steam rise slowly. Before reaching the rated main steam temperature and pressure, it cannot be incorporated into the main steam system for power generation. Therefore, the steam generated during the start-up process is discharged into the atmosphere through the live steam exhaust system.

[0003] In particular, when designing a waste incineration boiler, considering the problem of high-temperature flue gas corrosion, the flue gas temperature before the superheater will be controlled, which requires a large number of water-cooled walls to be arranged at the front end of the boiler for heat absorption. During the start-up, especially for a newly installed boiler, due to the small fouling of the water-cooled walls and large heat absorption, the flue gas temperature before the superheater is too low, resulting in it being difficult for the steam temperature at the boiler outlet to reach the rated main steam temperature. This will greatly increase the start-up time. Sometimes it even takes several months to reach the condition for parallel operation of the steam. During this period, a large amount of resources and energy will be wasted. Summary of the Invention

[0004] The purpose of the utility model is to provide a system for heating a waste storage pit by using live steam exhaust to solve the problems mentioned in the above background technique.

[0005] To solve the above technical problems, the utility model provides a system for heating a waste storage pit by using live steam exhaust, which includes:

[0006] A boiler;

[0007] A steam collecting header, the inlet of which is communicated with the steam outlet of the boiler through a boiler outlet connecting pipe;

[0008] A main steam header, which is communicated with the first outlet of the steam collecting header through a steam collecting header motorized gate valve;

[0009] An exhaust pipe, the inlet of which is communicated with the second outlet of the steam collecting header, the outlet of which is communicated with the external atmosphere, and a first stop valve and a second stop valve are sequentially arranged on the exhaust pipe;

[0010] A connecting pipe, the inlet of which is arranged between the first stop valve and the second stop valve and is communicated with the exhaust pipe, a third stop valve is arranged on the connecting pipe, and the outlet of the connecting pipe is communicated with the waste storage pit.

[0011] Further, a silencer is connected to the outlet of the exhaust steam pipeline, and the silencer is communicated with the external atmosphere.

[0012] Further, the first stop valve is a manual stop valve and is located at the inlet end of the exhaust steam pipeline, and the second stop valve is an electric stop valve and is located at the outlet end of the exhaust steam pipeline.

[0013] Further, the third stop valve is an electric stop valve.

[0014] Further, a fourth stop valve is further included, and the fourth stop valve is a manual stop valve and is located at the inlet end of the connecting pipeline.

[0015] The beneficial effects of the present utility model are as follows: The present utility model utilizes the steam discharged into the air during the boiler startup stage to heat the garbage storage pit, uses the heat of the steam to heat the garbage, can not only avoid a large amount of steam waste during the boiler startup stage, but also promote the fermentation of the garbage, improve the calorific value of the garbage entering the furnace, make the garbage combustion stable, and improve the garbage combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0017] Wherein: 1. Boiler; 2. Boiler outlet connecting pipe; 3. Steam collecting header; 4. Steam collecting header outlet electric gate valve; 5. Main steam header; 6. First stop valve; 7. Exhaust steam pipeline; 8. Second stop valve; 9. Silencer; 10. Fourth stop valve; 11. Third stop valve; 12. Connecting pipeline; 13. Garbage storage pit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only one embodiment of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0019] To make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0020] In the following description, references to "an embodiment", "embodiments", "an example", "examples", etc. indicate that the embodiments or examples so described may include specific features, structures, characteristics, properties, elements, or limitations, but not every embodiment or example necessarily includes the specific features, structures, characteristics, properties, elements, or limitations. Additionally, repeated use of the phrase "according to an embodiment of the present application" may, although not necessarily, refer to the same embodiment.

[0021] As Figure 1 shown, the present utility model discloses a system for heating a garbage storage pit 13 by using fire-making exhaust steam, which includes a boiler 1;

[0022] A steam collecting header 3, the inlet of the steam collecting header 3 is communicated with the steam outlet of the boiler 1 through a boiler outlet connecting pipe 2;

[0023] A main steam header 5, the main steam header 5 is communicated with the first outlet of the steam collecting header 3 through a steam collecting header 3 motorized valve;

[0024] An exhaust steam pipeline, the inlet of the exhaust steam pipeline 7 is communicated with the second outlet of the steam collecting header 3, the outlet of the exhaust steam pipeline 7 is communicated with the external atmosphere, and a first stop valve 6 and a second stop valve 8 are sequentially arranged on the exhaust steam pipeline 7; in this embodiment, the first stop valve 6 is located at a position close to the steam collecting header 3.

[0025] A connecting pipeline 12, the inlet of the connecting pipeline 12 is arranged between the first stop valve 6 and the second stop valve 8 and is communicated with the exhaust steam pipeline 7, a third stop valve 11 is arranged on the connecting pipeline 12, and the outlet of the connecting pipeline 12 is communicated with the garbage storage pit 13.

[0026] When the temperature and pressure of the steam in the boiler 1 during the startup stage do not reach the conditions for parallel operation to the main steam header 5, the steam collecting header outlet motorized valve 4 is closed, the first stop valve 6 is opened, the second stop valve 8 is closed, the steam generated by the boiler 1 is led to the steam collecting header 3 through the boiler outlet connecting pipe 2, and then enters the exhaust steam pipeline 7. The third stop valve 11 is opened, so that the steam enters the garbage storage pit 13 through the connecting pipeline 12, and the heat of the steam is used to heat the garbage to promote garbage fermentation, increase the calorific value of the garbage entering the furnace, and make the garbage incinerator burn stably. At the same time, when the steam generated by the boiler 1 exceeds the heating requirement of the garbage storage pit 13, in order to prevent damage to the system caused by too high steam pressure, the second stop valve 8 can be opened at this time, and the third stop valve 11 is closed so that the steam can be discharged into the atmosphere for pressure relief. This helps to maintain the stable operation of the system and protect the equipment from overpressure.

[0027] The utility model utilizes the steam discharged into the air during the furnace starting stage to heat the garbage storage pit 13, heats the garbage with the heat of the steam, can not only avoid a large amount of steam waste during the furnace starting stage, but also promote the fermentation of the garbage, increase the calorific value of the garbage entering the furnace, make the garbage combustion stable, and improve the garbage combustion efficiency.

[0028] In one embodiment, a silencer 9 is connected to the outlet of the exhaust steam pipe 7. The silencer 9 is communicated with the external atmosphere, and its function is to reduce or eliminate the noise generated during gas discharge and reduce noise pollution.

[0029] In one embodiment, the first stop valve 6 is a manual stop valve and is located at the inlet end of the exhaust steam pipe 7. The second stop valve 8 is an electric stop valve and is located at the outlet end of the exhaust steam pipe 7.

[0030] The manual stop valve can be quickly closed in an emergency to cut off the flow of the fluid, thereby protecting the downstream equipment and pipelines from damage. It does not require electric power or other external energy sources, so it is more reliable and has a lower cost in case of power failure or emergency.

[0031] The electric stop valve realizes remote or automatic control through an electric actuator, improving the automation level and operation efficiency of the system. It can be integrated with the central control system to achieve precise flow control and regulation of the external steam discharge, but the cost is relatively high. Therefore, a manual stop valve and an electric stop valve are arranged on the exhaust steam pipe 7 to achieve precise control of the externally discharged steam while controlling the cost.

[0032] In one embodiment, the third stop valve 11 is an electric stop valve to achieve precise flow control and regulation of the steam entering the steam-air preheater.

[0033] In one embodiment, it further includes a fourth stop valve 10. The fourth stop valve 10 is a manual stop valve and is located at the inlet end of the connecting pipe 12. The dual configuration of the manual stop valve and the electric stop valve on the connecting pipe 12 provides double insurance. When the electric stop valve fails or needs maintenance, the manual stop valve can be used as a backup means to ensure the normal operation of the system and facilitate maintenance. Similarly, in an emergency, the manual stop valve can quickly cut off the fluid to prevent the situation from expanding.

[0034] The design concept of the utility model is as follows:

[0035] Since domestic waste will be piled up in the waste storage pit 13 for about a week to ferment after being transported into the waste incineration power plant, so as to increase the calorific value of the waste entering the furnace and make the waste incinerator burn stably. The quality of waste fermentation mainly depends on the temperature of the waste storage pit 13. The higher the temperature, the better the fermentation effect. Especially in cold regions in winter, the collected waste may even freeze, resulting in poor fermentation effect, high moisture content of the waste entering the furnace, and unstable waste combustion. Therefore, the present utility model uses the steam in the starting stage of the boiler 1 to heat the waste storage pit 13 to solve these problems, and at the same time avoids a large amount of steam waste in the starting stage of the boiler 1.

[0036] When the temperature and pressure of the steam in the starting stage of the boiler 1 do not reach the conditions for parallel connection to the main steam header 5, close the motorized gate valve 4 at the outlet of the steam collector header, open the first stop valve 6, close the second stop valve 8, and the steam generated by the boiler 1 is led to the steam collector header 3 through the boiler outlet connection pipe 2, and then enters the exhaust pipe 7. Open the third stop valve 11, so that the steam enters the waste storage pit 13 through the connecting pipe 12, and the heat of the steam is used to heat the waste to promote waste fermentation, increase the calorific value of the waste entering the furnace, and make the waste incinerator burn stably.

[0037] At the same time, when the steam generated by the boiler 1 exceeds the heating requirement of the waste storage pit 13, in order to prevent damage to the system caused by too high steam pressure, the second stop valve 8 can be opened at this time, and the third stop valve 11 can be closed so that the steam can be discharged into the atmosphere through the exhaust pipe 7 and the silencer 9 for pressure relief. This helps to maintain the stable operation of the system and protects the equipment from overpressure.

[0038] When the temperature and pressure of the steam generated by the boiler 1 reach the conditions for parallel connection to the main steam header 5, close the second stop valve 8 and the third stop valve 11, and open the motorized gate valve 4 at the outlet of the steam collector header, then the steam can be supplied to the main steam header 5.

[0039] The present utility model uses the steam discharged into the air in the starting stage to heat the waste storage pit 13, and uses the heat of the steam to heat the waste, which can not only avoid a large amount of steam waste in the starting stage, but also promote waste fermentation, increase the calorific value of the waste entering the furnace, make the waste combustion stable, and improve the waste combustion efficiency.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present utility model will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for heating a garbage storage pit by using fire-starting exhaust steam, characterized in that: Comprising: A boiler; A steam collecting header, the inlet of which is communicated with the steam outlet of the boiler through a boiler outlet connecting pipe; A main steam header, the main steam header is communicated with the first outlet of the steam collecting header through a steam collecting header motorized valve; An exhaust pipe, the inlet of which is communicated with the second outlet of the steam collecting header, the outlet of the exhaust pipe is communicated with the external atmosphere, and a first stop valve and a second stop valve are sequentially arranged on the exhaust pipe; A connecting pipe, the inlet of which is arranged between the first stop valve and the second stop valve and is communicated with the exhaust pipe, a third stop valve is arranged on the connecting pipe, and the outlet of the connecting pipe is communicated with a garbage storage pit.

2. The system for heating a garbage storage pit by using a fire-starting exhaust steam according to claim 1, wherein: A silencer is connected to the outlet of the exhaust pipe, and the silencer is communicated with the external atmosphere.

3. The system for heating a garbage storage pit by using a fire-making exhaust steam according to claim 1, wherein: The first stop valve is a manual stop valve and is located at the inlet end of the exhaust pipe, and the second stop valve is an electric stop valve and is located at the outlet end of the exhaust pipe.

4. The system for heating a garbage storage pit by using a fire-starting exhaust steam according to claim 1, characterized in that: The third stop valve is an electric stop valve.

5. A system for heating a garbage storage pit by using a fire-generating exhaust steam according to claim 4, characterized in that: It further includes a fourth stop valve, and the fourth stop valve is a manual stop valve and is located at the inlet end of the connecting pipe.

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