Synthesis gas production system

Abstract

The utility model discloses a synthesis gas production system. Comprising a gasification furnace, a gas-liquid mixer, a cyclone separator, a water washing tower, a black water filter, a slag breaking machine, a lock hopper, a slag pool, a high-temperature hot water storage tank, an evaporation hot water tower, a deaerator, an ash water treatment device, a low-pressure flash tank, a vacuum flash tank, a vacuum flash condenser and a vacuum separation tank, the cyclone separator and the water washing tower are connected with the evaporation hot water tower, the deaerator, the evaporation hot water tower and the high-temperature hot water storage tank are sequentially connected, the gasification furnace, the slag breaking machine, the lock hopper and the slag pool are sequentially connected, and the ash water treatment device is connected with the evaporation hot water tower; the slag pool is connected with the vacuum flash tank, the vacuum flash tank is connected with the gas-liquid mixer, the evaporation hot water tower, the low-pressure flash tank, the vacuum flash tank, the vacuum flash condenser and the vacuum separation tank are sequentially connected, the low-pressure flash tank is connected with the deaerator, and the deaerator and the vacuum separation tank are connected with the ash water treatment device.

Description

Technical Field

[0001] The utility model belongs to the technical field of synthetic ammonia, and particularly relates to a synthetic gas production system. Background Art

[0002] Synthetic ammonia is synthesized with nitrogen and hydrogen as raw materials, and hydrogen comes from coal gasification (synthesis gas). The gasifier uses 4-10mm pulverized coal as raw material, and the gasifier reacts with the pulverized coal for gasification reaction. The synthesis gas after the reaction is sent to the synthetic ammonia system. In the preparation of synthesis gas, a large amount of water is required and a large amount of water (black water and gray water, etc.) is also produced. The black water is filtered through the black water filter and returned to the gasifier for reuse. Some hot water is treated by the evaporation hot water tower and reused; the gray water treatment device treats the gray water and then uses it in other equipment.

[0003] The patent with application number CN201921673695.4 discloses a stably operating gasifier drainage system, including a gasifier, a black water filter, a gas-liquid mixer, a cyclone separator, a water scrubber, a first buffer tank, a second buffer tank, a third buffer tank and a slag-containing water treatment device; the first buffer tank, the second buffer tank and the third buffer tank are all closed cylinders, and a water inlet is opened in the middle of the cylinder of the first buffer tank, the second buffer tank and the third buffer tank, a water outlet is opened in the upper part of the cylinder of the first buffer tank, the second buffer tank and the third buffer tank, and a slag discharge port is opened at the bottom of the cylinder of the first buffer tank, the second buffer tank and the third buffer tank; the synthesis gas outlet of the gasifier is connected to the air inlet of the gas-liquid mixer through a pipeline, the outlet of the gas-liquid mixer is connected to the inlet of the cyclone separator, the air outlet of the cyclone separator is connected to the air inlet of the water scrubber through a pipeline, and the top of the water scrubber The gas outlet is connected with the inlet of the synthesis gas storage tank through a pipeline; the black water outlet of the gasifier is connected with the water inlet of the first buffer tank through a pipeline, the black water outlet at the bottom of the cyclone separator is connected with the water inlet of the second buffer tank through a pipeline, the black water outlet at the bottom of the water scrubber is connected with the water inlet of the third buffer tank through a pipeline, and the water outlets of the first buffer tank, the second buffer tank and the third buffer tank are all connected with the water inlet of the evaporation chamber at the lower part of the evaporation hot water tower of the slag-containing water treatment device through a pipeline; the water outlet of the high-temperature hot water tank of the slag-containing water treatment device is divided into two ways, one way is connected with the water inlet in the middle part of the water scrubber through a pipeline, and the other way is connected with the water inlet of the black water filter through a pipeline, and the water outlet of the black water filter is connected with the washing water inlet of the gasifier through a pipeline; the black water outlet at the lower part of the water scrubber is divided into two ways, one way is connected with the liquid inlet of the gas-liquid mixer through a pipeline, and the other way is connected with the water inlet of the black water filter through a pipeline.

[0004] For example, the application number is CN201820168502.9, a water-coal slurry gasification system, including a gasifier, a cyclone separator, a water scrubber, an evaporative hot water tower and a high-temperature hot water storage tank; the gasifier has oxygen and water-coal slurry injection inlets; the water gas outlet of the gasifier is connected to the water gas inlet of the cyclone separator through a pipeline; the water gas outlet of the cyclone separator is connected to the water gas inlet of the water scrubber through a pipeline; the water gas inlet of the water scrubber is connected to the water gas storage device, thereby forming a water gas purification pipeline; the first wastewater outlet of the water scrubber, the wastewater outlet of the cyclone separator and the wastewater outlet of the gasifier are all connected to the wastewater inlet of the evaporative hot water tower through a pipeline; the clean water outlet of the evaporative hot water tower is connected to the clean water inlet of the high-temperature hot water storage tank through a pipeline; the clean water outlet of the high-temperature hot water storage tank is feedback connected to the clean water inlet of the water scrubber; in addition, the second wastewater outlet of the water scrubber is connected to the water inlet of the filter; the water outlet of the filter is feedback connected to the water inlet of the gasifier, thereby forming a water circulation pipeline.

[0005] The applicant has found that there is a large amount of excess hot water in the evaporative hot water tower. If it is directly sent to the grey water treatment device for treatment, the energy of the hot water will be wasted. Utility Model Content

[0006] The embodiment of the utility model provides a synthesis gas production system, which processes the surplus hot water of the evaporation hot water tower through a low-pressure flash tank, a vacuum flash tank, a vacuum flash condenser and a vacuum separation tank, and the steam is used as the heat source of the deaerator, and after cooling and gas-liquid separation, it is sent to the gray water treatment device for treatment. The technical scheme is as follows:

[0007] The utility model embodiment provides a synthesis gas production system, the system includes a gasifier, a gas-liquid mixer, a cyclone separator, a water washing tower, a black water filter, a slag breaker, a lock bucket 1, a slag pool 5, a high-temperature hot water storage tank, an evaporative hot water tower, a deoxidizer and a gray water treatment device, the gasifier, the gas-liquid mixer, the cyclone separator and the water washing tower are connected in sequence through pipelines, the wastewater outlet of the water washing tower is connected to the water inlet of the gasifier through a pipeline with a black water filter, the wastewater outlets of the cyclone separator and the water washing tower are connected to the water inlet of the evaporative hot water tower through pipelines, the deoxidizer, the evaporative hot water tower and the high-temperature hot water storage tank are connected in sequence through pipelines, the high-temperature hot water storage tank is connected to the water inlets of the water washing tower and the gas-liquid mixer through a pipeline with a high-temperature hot water pump, the gasifier, the slag breaker, the lock bucket 1 and the slag pool 5 are connected in sequence, the drain outlet on the upper part of the lock bucket 1 is connected to the water inlet of the gasifier through a pipeline with a circulation pump 2, and the water outlet of the gray water treatment device is connected to the water inlet of the evaporative hot water tower; the system also includes a low-pressure flash tank, a vacuum flash tank, a vacuum flash condenser and a vacuum separation tank, the slag pool 5 is connected to the vacuum flash tank through a pipeline with a slag water pump 6, the drain outlet of the vacuum flash tank is connected to the gas-liquid mixer through a pipeline, the water outlet of the evaporative hot water tower, the low-pressure flash tank, the vacuum flash tank, the vacuum flash condenser and the vacuum separation tank are connected in sequence through pipelines, the exhaust port of the low-pressure flash tank is connected to the steam inlet of the deaerator through a pipeline, and the condensed water outlet of the deaerator and the drain outlet of the vacuum separation tank are both connected to the water inlet of the gray water treatment device through pipelines.

[0008] The synthesis gas production system provided by the embodiment of the utility model also includes a waste gas condenser and a gas-liquid separator; the air inlet of the waste gas condenser is connected to the exhaust port of the evaporative hot water tower through a pipeline, and its condensed water outlet is connected to the gas-liquid separator through a pipeline; the gas outlet of the gas-liquid separator is connected to the flare through a pipeline, and its drain outlet is connected to the water inlet of the gray water treatment device through a pipeline.

[0009] The synthesis gas production system provided by the embodiment of the utility model also includes a low-pressure flash condenser; the exhaust port of the low-pressure flash tank is divided into two outputs and selected, one is connected to the steam inlet of the deaerator through a pipeline, and the other is connected to the air inlet of the low-pressure flash condenser through a pipeline; the condensate outlet of the low-pressure flash condenser is connected to the water inlet of the gray water treatment device through a pipeline.

[0010] The synthesis gas production system provided by the embodiment of the utility model also includes a wash water cooler 4 and a flushing water tank 3; the inlet of the wash water cooler 4 is connected to the water outlet of the gray water treatment device through a pipeline with a wash water pump, and its outlet is connected to the water inlet of the flushing water tank 3 through a pipeline; the water outlet of the flushing water tank 3 is connected to the flushing water inlet of the lock bucket 1 through a pipeline.

[0011] Among them, the flushing water tank 3 in the embodiment of the utility model is located above the lock bucket 1, and the slag pool 5 is located directly below the lock bucket 1 and is provided with an agitator 7; the overflow port on the top of the flushing water tank 3 is connected to the slag pool 5 through a pipeline.

[0012] Furthermore, the black water outlet of the black water filter in the embodiment of the utility model is connected to the slag pool (5) through a pipeline.

[0013] The beneficial effects of the technical solution provided by the embodiment of the utility model are as follows: the embodiment of the utility model provides a synthesis gas production system, which processes the surplus hot water of the evaporative hot water tower through a low-pressure flash tank, a vacuum flash tank, a vacuum flash condenser and a vacuum separation tank, and the steam is used as the heat source of the deaerator, and is sent to the gray water treatment device for treatment after cooling and gas-liquid separation (it is easier to handle after exhaust and cooling), thereby reducing energy consumption. In addition, the hot water (relatively dirty) in the slag pool is cooled and degassed by the vacuum flash tank, and used in the gas-liquid mixer, further reducing the hot water treatment amount of the evaporative hot water tower and achieving optimal use of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a principle block diagram of the synthesis gas production system provided by the embodiment of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the combination of a lock bucket, a flushing water tank, a wash water cooler and a slag pool.

[0016] In the figure: 1 lock bucket, 2 circulation pump, 3 flushing water tank, 4 wash water cooler, 5 slag pool, 6 slag water pump, 7 agitator;

[0017] A comes from the slag crusher, B goes to the gasifier, C comes from the high-temperature hot water pump, D comes from the flushing water pump, E comes from the black water filter, and F goes to the vacuum flash tank. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0019] See also Figure 1-2The embodiment of the utility model provides a synthesis gas production system. The system includes a gasifier, a gas-liquid mixer, a cyclone separator, a water scrubber, a black water filter, a slag breaker, a lock bucket 1, a slag pool 5, a high-temperature hot water storage tank, an evaporative hot water tower, a deoxidizer, a gray water treatment device, a low-pressure flash tank, a vacuum flash tank, a vacuum flash condenser, a vacuum separation tank, a waste gas condenser, a gas-liquid separator, a low-pressure flash condenser, a wash water cooler 4 and a flushing water tank 3. The gasifier, the gas-liquid mixer, the cyclone separator and the water scrubber are connected in sequence through pipelines to prepare synthesis gas and cool and purify the synthesis gas. The wastewater outlet of the water scrubber is connected to the water inlet of the gasifier through a pipeline with a black water filter to realize the reuse of black water, and the black water outlet of the black water filter is connected to the slag pool 5 through a pipeline. The wastewater outlets of the cyclone separator and the water scrubber are both connected to the water inlet of the evaporative hot water tower through pipelines to send hot water to the evaporative hot water tower for treatment. The deaerator, evaporative hot water tower and high-temperature hot water storage tank are connected in sequence through pipelines; the water inlet of the deaerator is connected to the desalted water preparation device through a pipeline, which is used to replenish water for the evaporative hot water tower, and its steam inlet can replenish steam (when the recovered steam is insufficient). The high-temperature hot water storage tank is connected to the water inlet of the water washing tower (preferentially satisfied) and the gas-liquid mixer (secondary, mainly through the vacuum flash tank for water supply) through a pipeline with a high-temperature hot water pump, which is used to provide spray water for the water washing tower and water for the gas-liquid mixer. The gasifier, slag crusher, lock bucket 1 and slag pool 5 are connected in sequence to achieve crushing and slag water separation. The drainage outlet on the top of the lock bucket 1 is connected to the water inlet of the gasifier through a pipeline with a circulating pump 2 to achieve the reuse of cleaner hot water. The water outlet of the gray water treatment device is connected to the water inlet of the evaporative hot water tower, and its water outlet is also connected to the inlet of the wash water cooler 4 (in which cooling water is passed) through a pipeline with a wash water pump. The outlet of the wash water cooler 4 is connected to the water inlet of the flushing water tank 3 through a pipeline, and the outlet of the flushing water tank 3 is connected to the flushing water inlet of the lock bucket 1 through a pipeline to flush the lock bucket 1 with relatively clean water. The slag pool 5 is connected to the vacuum flash tank through a pipeline with a slag water pump 6 to achieve cooling and gas-water separation of the water in the slag pool 5, and the drain outlet of the vacuum flash tank is connected to the gas-liquid mixer through a pipeline to achieve water reuse (the quality and output of the water are suitable for the gas-liquid mixer). The water outlet of the evaporative hot water tower, the air inlet of the low-pressure flash tank and the vacuum flash tank are connected in sequence through pipelines, and the exhaust port of the evaporative hot water tower is connected to the air inlet of the exhaust gas condenser (in which cooling water is passed) through a pipeline to recover condensed water. The condensed water outlet of the exhaust gas condenser is connected to the gas-liquid separator through a pipeline. The gas outlet of the gas-liquid separator is connected to the flare through a pipeline, and its drain outlet is connected to the water inlet of the gray water treatment device through a pipeline. The exhaust port of the vacuum flash tank, the vacuum flash condenser, the vacuum separation tank and the vacuum pumping structure are connected in sequence through pipelines, the exhaust port of the vacuum pumping structure is connected to the torch through a pipeline, and the wastewater outlet is connected to the water inlet of the gray water treatment device through a pipeline.The exhaust port of the low-pressure flash tank is divided into two outputs and selected. One is connected to the steam inlet of the deaerator through a pipeline (preferably satisfied) to achieve heat reuse, and the other (surplus steam) is connected to the air inlet of the low-pressure flash condenser through a pipeline. The condensate outlet of the low-pressure flash condenser, the condensate outlet of the deaerator and the drain outlet of the vacuum separation tank are all connected to the water inlet of the gray water treatment device through a pipeline. The gray water treatment device is a conventional structure, including sedimentation equipment and filtration equipment.

[0020] Among them, see Figure 2 The flushing water tank 3 in the embodiment of the utility model is located above the lock bucket 1. The slag pool 5 is located directly below the lock bucket 1 and is provided with a stirrer 7, which is provided with a slag scooping machine. The overflow port at the top of the flushing water tank 3 is connected to the slag pool 5 through a pipeline.

[0021] Valves, flow meters, pumps and other structures are provided on the pipelines between the aforementioned structures as required, and those skilled in the art can add them as required.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A synthesis gas production system, comprising a gasifier, a gas-liquid mixer, a cyclone separator, a water scrubber, a black water filter, a slag breaker, a lock bucket (1), a slag pool (5), a high-temperature hot water storage tank, an evaporative hot water tower, a deoxidizer and a gray water treatment device, wherein the gasifier, the gas-liquid mixer, the cyclone separator and the water scrubber are connected in sequence through pipelines, the wastewater outlet of the water scrubber is connected to the water inlet of the gasifier through a pipeline with a black water filter, and the wastewater outlets of the cyclone separator and the water scrubber are connected to the evaporative hot water tank through pipelines. The deaerator, the evaporative hot water tower and the high-temperature hot water storage tank are connected in sequence through pipelines, the high-temperature hot water storage tank is connected to the water inlets of the water washing tower and the gas-liquid mixer through a pipeline with a high-temperature hot water pump, the gasifier, the slag crusher, the lock bucket (1) and the slag pool (5) are connected in sequence, the drainage port on the upper part of the lock bucket (1) is connected to the water inlet of the gasifier through a pipeline with a circulation pump (2), and the water outlet of the gray water treatment device is connected to the water inlet of the evaporative hot water tower; characterized in that, The system also includes a low-pressure flash tank, a vacuum flash tank, a vacuum flash condenser and a vacuum separation tank. The slag pool (5) is connected to the vacuum flash tank through a pipeline with a slag water pump (6). The drain outlet of the vacuum flash tank is connected to a gas-liquid mixer through a pipeline. The water outlet of the evaporative hot water tower, the low-pressure flash tank, the vacuum flash tank, the vacuum flash condenser and the vacuum separation tank are connected in sequence through pipelines. The exhaust port of the low-pressure flash tank is connected to the steam inlet of the deaerator through a pipeline. The condensate outlet of the deaerator and the drain outlet of the vacuum separation tank are both connected to the water inlet of the gray water treatment device through pipelines.

2. The synthesis gas production system according to claim 1, characterized in that: The system also includes a waste gas condenser and a gas-liquid separator; the air inlet of the waste gas condenser is connected to the exhaust port of the evaporative hot water tower through a pipeline, and its condensed water outlet is connected to the gas-liquid separator through a pipeline; the gas outlet of the gas-liquid separator is connected to the torch through a pipeline, and its drain outlet is connected to the water inlet of the gray water treatment device through a pipeline.

3. The synthesis gas production system according to claim 1, characterized in that: The system also includes a low-pressure flash condenser; the exhaust port of the low-pressure flash tank is divided into two outputs and selected, one is connected to the steam inlet of the deaerator through a pipeline, and the other is connected to the air inlet of the low-pressure flash condenser through a pipeline; the condensate outlet of the low-pressure flash condenser is connected to the water inlet of the gray water treatment device through a pipeline.

4. The synthesis gas production system according to claim 1, characterized in that: The system also includes a wash water cooler (4) and a flushing water tank (3); the inlet of the wash water cooler (4) is connected to the water outlet of the grey water treatment device via a pipeline with a wash water pump, and the outlet is connected to the water inlet of the flushing water tank (3) via a pipeline; the water outlet of the flushing water tank (3) is connected to the flushing water inlet of the lock bucket (1) via a pipeline.

5. The synthesis gas production system according to claim 4, characterized in that: The flushing water tank (3) is located above the lock bucket (1), and the slag pool (5) is located directly below the lock bucket (1) and is provided with a stirrer (7); the overflow port at the top of the flushing water tank (3) is connected to the slag pool (5) through a pipeline.

6. The synthesis gas production system according to claim 1, characterized in that: The black water outlet of the black water filter is connected to the slag pool (5) through a pipeline.

Images