Who has an introduction to the utility systems for space furnaces?

There are many public works systems: HS, LS, IA, PA, MBW, CW, DW, EW, ............; if you want to know more about a specific one, we can discuss it

It are the utility systems supporting the gasification process, mainly involving the transportation and buffering of carbon dioxide and nitrogen, as well as water

Main uses of the carbon dioxide system in the gasification unit: 1. Pressurizing the pulverized coal hopper; 2. Fluidizing the material flow at the bottom of the inflation cone in the pulverized coal feed tank; 3. Controlling the flow rate in the pulverized coal delivery pipelines; 4. Providing protective gas for the annular chamber of the gasification furnace; 5. Providing protective gas for the burners in the gasification furnace; 6. Used for purging various instruments and equipment. Regarding the distribution of this system, the pulverized coal hopper pressurization system is considered an “intermittent” user. The instantaneous flow rate is very high, but the usage time is short. This pipeline is an independent one, with a control pressure of 5.1 MPa; however, when the pressure in another pipeline is low, a interlock mechanism is triggered, requiring a compromise – that is, the pressurization process can be postponed. Both it and the users are continuous-type users, sharing one main pipeline with a set pressure of 5.1 MPa, which needs to be maintained stable. Regarding buffer tanks: Generally, the pressure setting for buffer tanks should be higher, mainly to accommodate the demand from intermittent users. Since the instantaneous consumption is very high during pressurization while the average hourly consumption is lower, the buffer tank should actually be in a state of constant pressure variation. The calculation of the volume of the buffer tank takes into account the need for the system to be able to maintain pressure for 15–30 minutes in the event of a short-term interruption of the carbon dioxide supply (usually due to a failure of the CO2 compressor). It is important to note that as the CO2 is consumed, the pressure drops, and once it reaches a certain level, this will trigger an immediate shutdown of the system.

The use of nitrogen is mainly divided into two aspects: 1. Oxygen pipelines include those used for ignition, startup, and cleaning and purging of the oxygen pipelines in coal powder burners. The main reason is that high-pressure nitrogen HN has a higher level of cleanliness compared to high-pressure CO2; generally, the CO2 produced by compressors, especially in piston compressors, contains more oil, which can lead to explosions in oxygen pipelines. 2. Considering the acidity of CO2, which can lead to the formation of highly corrosive CO3 2- at high temperatures, it cannot be used in applications such as pressure makeup air for burner cooling water systems or pressure makeup air for drum systems. The nitrogen system has a relatively simple flow: high-pressure nitrogen from the air separation unit enters a buffer tank in the boundary area. After that, pressure regulation takes place, followed by filtration through a precision filter, before the nitrogen is sent to various users. Although it is simple, it is very important due to its role in ignition and in keeping the oxygen pipelines clean during normal production; therefore, it is also integrated into the main control system.

DW, RW, CW, and EW are too simple to mention; they are all generic systems

That’s great – I understood a lot right away. Thank you. Are you working in gasification?