CN111347541A - A kind of autoclaved sand aerated block brick autoclave tail gas treatment device and method - Google Patents

Abstract

The invention relates to a tail gas treatment device for an autoclave of autoclaved sand aerated block bricks, and belongs to the technical field of auxiliary equipment for producing autoclaved sand aerated block bricks. The tail gas treatment device for the autoclaved sand aerated block brick autoclave comprises a steam source box, a steam generator, a waste heat utilization mechanism, a tail gas purification mechanism, a steam inlet main pipe, a steam outlet main pipe and a plurality of autoclaves; the steam source box is communicated with the steam inlet main pipe through a steam source valve; the steam inlet main pipe is communicated with an inlet of the still kettle through a steam inlet branch pipe and a steam pressure regulating valve; a tail gas outlet of the still kettle is communicated with a steam outlet main pipe through a steam outlet branch pipe and a steam outlet valve; the tail gas treatment device of the autoclaved sand aerated block brick autoclave has a compact structure and is ingenious in design, and the problems of low heat utilization rate, low working efficiency and high failure rate existing in the conventional tail gas treatment mode of the autoclaved sand aerated block brick autoclave are solved; the requirement of autoclaved sand aerated block brick production and use is met.

Description

A kind of autoclaved sand aerated block brick autoclave tail gas treatment device and method

technical field

The invention relates to an autoclave tail gas treatment device for autoclaved sand aerated block bricks, which belongs to the technical field of auxiliary equipment for the production of autoclaved sand aerated block bricks.

Background technique

Autoclaved sand aerated blocks are made of calcareous materials (cement, lime, etc.) and siliceous materials (sand, fly ash, etc.) with air-entraining agents added to them. It can be shaped and sold after pre-curing treatment in the room, static curing and cutting in the static stop room, and then autoclave curing.

In the autoclave curing process of the autoclaved sand aerated blocks, the autoclave needs to be exhausted; because the main components in the autoclave tail gas of the autoclaved sand aerated block bricks are water vapor and A little dust generated in the maintenance process and the odor emitted by the autoclaved sand aerated blocks; in the traditional production process, the company has always adopted the method of direct emptying, which has the problem of polluting the environment. In addition, there is also the problem of energy waste in the direct emission of tail gas from the autoclave of autoclaved sand aerated block bricks. At the same time, the pre-curing treatment in the pre-curing room and the rest-curing treatment in the static stop room need to consume a lot of energy to maintain the indoor temperature; there is a problem of large energy consumption.

In order to solve the above problems, there are also tail gas treatment devices on the market. For example, an autoclave system disclosed in the invention patent with the authorization announcement number of CN105291257B is introduced into other autoclaves by introducing the tail gas into the steam extraction pipe. It is used as a preheating energy source to complete the recovery of tail gas; although it achieves the purpose of recovering all tail gas, it has the following problems:

1. When the existing autoclave is exhausted, it enters other autoclaves through the steam extraction pipe by means of natural decompression. Because it is a sealed cycle, the autoclave has a natural decompression time. If it is too long, it will cause the problem of low working efficiency of the autoclave.

2. After the existing autoclave is naturally depressurized, the remaining tail gas needs to be heated by introducing an external heat source, and then introduced into other autoclaves as a preheating energy source. Since the remaining exhaust gas is heated by an external heat source, there must be a certain heat loss in the process of heat exchange. It is better to directly pass the external heat source into the autoclave for utilization, and there is a "low heat utilization rate". The problem".

3. In addition to water vapor, there are other impurities such as dust in the autoclave tail gas of autoclaved sand-entrained block bricks. When it is directly passed into other autoclaves for use as preheating energy, there are "easy-to-build" problems. The problem of high failure rate of autoclave caused by problems such as "scale".

Therefore, in view of the above problems, it is necessary to develop an autoclave tail gas treatment device for autoclaved sand aerated block bricks, which can not only effectively utilize the waste heat of the autoclave tail gas, but also achieve the purpose of optimizing the production environment.

SUMMARY OF THE INVENTION

The purpose of the present invention is to: provide a kind of simple structure, easy to use, so as to solve the problems of low heat utilization rate, low work efficiency and high failure rate existing in the existing autoclaved sand aerated block brick autoclave tail gas treatment method. Autoclaved sand aerated block brick autoclave tail gas treatment device.

The technical scheme of the present invention is:

An autoclaved sand aerated block brick autoclave tail gas treatment device, comprising a steam source box, a steam generator, a waste heat utilization mechanism, a tail gas purification mechanism, a steam inlet header, a steam outlet header and a plurality of autoclaves; the The steam source box is communicated with the steam inlet main pipe through the steam source valve; the steam inlet main pipe is communicated with the inlet of the autoclave through the steam inlet branch pipe and the steam pressure regulating valve; it is characterized in that: the tail gas outlet of the autoclave passes the steam outlet The branch pipe and the steam outlet valve are communicated with the steam outlet main pipe; the steam outlet main pipe is communicated with the heating inlet of the steam generator through the switch valve A; the heating outlet of the steam generator is connected with the steam outlet main valve through the pipeline; the steam outlet main valve passes through The on-off valve B is communicated with the exhaust gas purification mechanism; the main steam outlet valve is communicated with the waste heat utilization mechanism through the on-off valve C; the steam outlet of the steam generator is communicated with the steam inlet main pipe through the supplementary steam valve; The valve and the on-off valve B communicate with the exhaust gas purification mechanism.

The steam generator is composed of a main cylinder, a steam drum, a water replenishing valve, a head, a sealing plate and a heat exchange tube; the upper end of the main cylinder is connected with a steam drum; the steam drum passes through its own steam outlet It is connected with the steam intake valve and the steam inlet main pipe; the interior of the main cylinder is symmetrically fixed with packing plates; a plurality of heat exchange tubes are installed between the packing plates in a standard shape; on the main cylinder between the packing plates A water supply valve is connected; the water supply valve is communicated with the external water source; the two ends of the main cylinder body are respectively fixed with sealing heads; the sealing head at one end of the main cylinder body is communicated with the on-off valve A through its own heating inlet; The head at the other end of the main cylinder communicates with the steam outlet main valve through its own heating outlet.

A safety valve is connected and installed on the steam drum.

The exhaust gas purification mechanism is composed of a sealed cooling pool, a heat dissipation pool, a conveying fan, a purifier and a spray water pump; a sealed cooling pool is arranged on the bank of one side of the heat dissipation pool; a partition wall is arranged in the middle of the sealed cooling pool; The upper surface of the partition wall is sealedly connected with the top of the sealed cooling pool; the two ends of the partition wall have a certain gap with the two ends of the sealed cooling pool respectively; one end of the sealed cooling pool on one side of the partition wall is connected with an air intake pipe; The air pipe is connected with the switch valve B; the sealed cooling pool on the other side of the partition wall is connected with the purifier on the sealed cooling pool through the exhaust pipe and the conveying fan; the purifier is connected with the cooling pool through the pipeline and the spray water pump; the sealing An overflow pipe A is connected to the side of the cooling pool, and the overflow pipe A is communicated with the cooling pool.

The inside of the sealed cooling pool on both sides of the partition wall is respectively provided with a spray branch pipe; one end of the spray branch pipe is connected with a spray main pipe, and one end of the spray main pipe passes through the sealed cooling pool and passes through pipes and a spray water pump to dissipate heat. The pool is connected.

The air intake direction of the air intake pipe is consistent with the lateral direction of the partition wall; the vertical position of the air intake pipe is higher than the vertical position of the overflow pipe A.

The air intake pipe is provided with an emptying pipe through an emptying valve.

The purifier is composed of an assembly box, a bracket and a shower head; an assembly box is fixed above the heat dissipation pool through a bracket; the inside of the assembly box is divided into an air storage chamber and an adsorption chamber by a partition plate ; One side of the air storage chamber is connected to the outlet of the conveying fan; the top of the adsorption chamber is equipped with a sprinkler head, and the sprinkler head is connected to the cooling pool through pipes and a sprinkler pump; the adsorption chamber under the sprinkler head is separated by a grid. A plurality of activated carbon layers are arranged; ventilation holes are arranged on the partition plate between the activated carbon layers; a diatomaceous earth layer is arranged below the activated carbon layer;

The waste heat utilization mechanism is composed of a sub-cylinder, a heating coil A, a heating coil B, a pre-curing room, a static stop room, a mixing tank, a pressure pump A and a pressure pump B: the static stop room is provided with Heating coil A and mixing tank; heating coil B is arranged in the pre-curing chamber; mixing tank is connected with one end of heating coil A through pressurizing pump A; mixing tank is connected with one end of heating coil B through pressurizing pump B; The other end of the heating coil A and the other end of the heating coil B are connected with the mixing tank; the mixing tank is connected with the switch valve C through the steam pipe and the sub-cylinder.

The sub-cylinder is composed of a sub-cylinder body and a steam trap; one side of the sub-cylinder body is provided with a steam inlet, and the sub-cylinder body is communicated with the switch valve C through the steam inlet; the upper end of the sub-cylinder body is provided with a steam outlet, The steam outlet is communicated with the mixing tank through the switch valve D and the steam transmission pipe; the lower end of the sub-cylinder body is provided with a drain port, and the drain port is connected with a drain valve.

In the sub-cylinder body on one side of the steam inlet, a steam blocking plate is fixed in an inclined shape through a support plate.

The pre-curing room and the static stop room are respectively provided with temperature sensors; the temperature sensor in the pre-curing room is electrically connected with the pressure pump B; the temperature sensor in the static stop room is electrically connected with the pressure pump A.

The upper end of the mixing tank is provided with an overflow pipe B.

The described working method of the autoclaved sand aerated block brick autoclave tail gas treatment device comprises the following steps:

(1), perform steam discharge for the autoclave 7 that needs to discharge tail gas:

a. Open the tail gas discharge port of the autoclave and the corresponding steam outlet valve; open the switch valve A, so that the exhaust gas discharged from the autoclave can enter the outlet along the steam outlet branch pipe, the steam outlet valve, the steam outlet main pipe and the switch valve A. Inside the head of one end of the steam generator;

b. Open the main steam outlet valve and the on-off valve C, so that the exhaust gas entering the head of one end of the steam generator can pass through the heat exchange tube and enter the inner head of the other end of the steam generator; then the exhaust gas will follow the main steam outlet valve. and the switch valve C into the waste heat utilization mechanism; in this process, the main cylinder body needs to be replenished with water through the water replenishment valve at any time; so that the exhaust gas can heat the water in the main cylinder body 1 through the heat exchange pipe to generate steam and store it in the in the steam drum;

c. The exhaust gas will generate a certain amount of condensed water after the heat exchange of the steam generator, and the condensed water will be connected with the exhaust gas and enter the waste heat utilization mechanism together; in this process, the exhaust gas and the condensed water will first pass through the on-off valve C and the steam inlet. Enter into the sub-cylinder body; the condensed water entering the sub-cylinder body will be discharged through the trap; the exhaust gas entering the sub-cylinder body will enter the mixing tank through the switch valve D and the steam pipe; enter the mixing tank The exhaust gas in the boiler will be mixed with the circulating water inside; the temperature of the mixed circulating water will increase; in this process, the booster pump A and the booster pump B will transport the heated circulating water to the heating coils A and B respectively. In the heating coil B, the static stop room and the pre-curing chamber are heated and then returned to the mixing tank to participate in the circulation again; in the above process, when the temperature sensor in the pre-curing chamber senses that the temperature is higher than a certain temperature, the temperature sensor will By reducing the operating power of the booster pump B, the circulation speed of the circulating water in the heating coil B is reduced. On the contrary, when the temperature sensor in the pre-curing room senses that the temperature is lower than a certain temperature, the temperature sensor will increase the pressure The way of operating power of the pressure pump B increases the circulation speed of the circulating water in the heating coil B, so that the temperature in the pre-curing room is always maintained within a certain range; in the same way, the static room will be pressurized through the temperature sensor. The way of pump A keeps the indoor temperature within a certain range;

(2) Boost preheating for the autoclave that needs to be boosted:

a. Open the steam supplement valve and the steam pressure regulating valve connected with the autoclave that needs to be boosted, so that the steam in the steam drum of the steam generator can enter the autoclave through the steam inlet main pipe, the steam inlet branch pipe and the steam pressure regulating valve It is boosted and preheated in it;

b. The steam in the steam generator enters the autoclave through the steam pressure regulating valve for boosting and preheating it: if the steam in the steam drum of the steam generator is sufficient, it is necessary to pass the steam pressure regulating valve to enter the autoclave. The steam pressure in the autoclave is adjusted so that the steam can enter the autoclave at standard pressure to complete the boosting preheating work; if the steam in the steam drum of the steam generator is insufficient, the steam source valve needs to be opened. The steam in the steam source box can enter the autoclave through the steam inlet main pipe, the steam inlet branch pipe and the steam pressure regulating valve for preheating, so as to achieve the purpose of making up for the lack of steam in the steam generator;

(3) Handling of abnormality in steam generator:

a. When the steam generator is abnormal, firstly close the main steam outlet valve, the steam supplement valve, the switch valve A and the water supplement valve, so that the steam generator is completely isolated from the outside world, which is convenient for people to repair the steam generator; at the same time Open the steam source valve and the discharge valve; enable the steam source box to replace the steam generator to provide a boost heat source for the autoclave, so that the exhaust gas in the autoclave can enter the waste heat utilization mechanism through the steam outlet main pipe and the switch valve C. Provide heat source for the insulation of static room and pre-curing room;

b. When the waste heat utilization mechanism cannot consume the exhaust gas discharged from the autoclave, open the on-off valve B, so that part of the exhaust gas discharged from the autoclave can enter the exhaust gas purification mechanism with the discharge valve and the switch valve B for external discharge;

c. When the exhaust gas enters the exhaust gas purification mechanism, firstly turn on the spray water pump to provide the spray water source for the spray head in the purifier and the spray branch pipe in the sealed cooling pool through the pipeline; then turn on the conveying fan to make The exhaust gas enters the sealed cooling pool through the intake pipe; then the exhaust gas moves around the partition wall under the guidance of its own pressure and the partition wall; in this process, the spray water sprayed from the spray branch pipe will mix with the exhaust gas and generate heat with it. The effect of spraying, cooling and decompressing the exhaust gas is achieved, and at the same time, part of the dust in the exhaust gas is dissolved in the water by washing with water, and finally overflows into the cooling pool through the overflow pipe A; When the exhaust gas moves to the other side of the partition wall, the exhaust gas will enter the gas storage chamber of the purifier through the exhaust pipe under the suction of the conveying fan; the exhaust gas entering the gas storage chamber will enter the activated carbon through the ventilation hole. In the space between the layers; in this process, the spray water sprayed by the sprinkler head will be fully mixed with the exhaust gas and drive it to pass through the activated carbon layer and the diatomite layer together, and then fall back into the cooling pool; in the exhaust gas As the spray water passes through the activated carbon layer and the diatomaceous earth layer, the activated carbon layer and the diatomaceous earth layer adsorb the dust and pungent odor in the exhaust gas to achieve the purpose of purifying the exhaust gas;

d. When multiple autoclaves discharge the exhaust gas at the same time and the pressure in the steam outlet main pipe exceeds the set value, open the exhaust valve in the exhaust gas purification mechanism so that part of the exhaust gas can be discharged through it; when the pressure in the steam outlet main pipe When it returns to normal value, close the vent valve.

The advantages of the present invention are:

The autoclaved sand aerated block brick autoclave tail gas treatment device has a compact structure and ingenious design, and can improve the utilization rate of waste heat of the autoclave tail gas by means of step-by-step utilization on the premise of ensuring the efficient operation of the autoclave. At the same time, it can also purify and recover the exhaust gas, thereby solving the problems of low heat utilization rate, low work efficiency and high failure rate of the existing autoclaved sand aerated block brick autoclave exhaust gas treatment method; The need for the production and use of autoclaved sand aerated block bricks.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the steam generator of the present invention;

Fig. 3 is the structural representation of the exhaust gas purification mechanism of the present invention;

Fig. 4 is the structural representation of A-A direction in Fig. 3;

Fig. 5 is the structural representation of the direction B-B in Fig. 3;

Fig. 6 is the enlarged structure schematic diagram of C place in Fig. 4;

7 is a schematic structural diagram of the waste heat utilization mechanism of the present invention;

FIG. 8 is a schematic structural diagram of the sub-cylinder body of the present invention.

In the picture: 1. Steam source box, 2. Steam generator, 3. Waste heat utilization mechanism, 4. Exhaust gas purification mechanism, 5. Steam inlet manifold, 6. Steam outlet manifold, 7. Autoclave, 8. Steam source valve , 9, steam pressure regulating valve, 10, steam inlet branch pipe, 11, steam outlet branch pipe, 12, steam outlet valve, 13, switch valve A, 14, outlet main valve, 15, switch valve B, 16, switch valve C , 17, discharge valve, 18, steam supply valve, 19, main cylinder, 20, steam drum, 21, water supply valve, 22, head, 23, packing plate, 24, safety valve, 25, heat exchange tube, 26, sealed cooling pool, 27, cooling pool, 28, conveying fan, 29, purifier, 30, spray water pump, 31, partition wall, 32, intake pipe, 33, exhaust pipe, 34, overflow pipe, 35 , spray branch pipe, 36, spray main pipe, 37, emptying valve, 38, emptying pipe, 39, assembly box, 40, bracket, 41, spray head, 42, partition plate, 43, gas storage chamber , 44, adsorption chamber, 45, activated carbon layer, 46, vent hole, 47, diatomite layer, 48, heating coil A, 49, heating coil B, 50, pre-curing chamber, 51, static room, 52 , mixing tank, 53, booster pump A, 54, booster pump B, 55, steam pipe, 56, sub-cylinder body, 57, steam inlet, 58, steam outlet, 59, switch valve D, 60, Drain port, 61, steam trap, 62, support plate, 63, vapor barrier, 64, temperature sensor, 65, overflow pipe B.

Detailed ways

The autoclaved sand aerated block brick autoclave tail gas treatment device includes a steam source box 1, a steam generator 2, a waste heat utilization mechanism 3, a tail gas purification mechanism 4, a steam inlet main pipe 5, a steam outlet main pipe 6 and a plurality of steam generators. Autoclave 7 (see Figure 1 of the description).

The steam source box 1 is communicated with the steam inlet main pipe 5 through the steam source valve 8; the steam inlet main pipe 5 is communicated with the inlet of the autoclave 7 through the steam inlet branch pipe 10 and the steam pressure regulating valve 9 (see Figure 1 in the description). The steam pressure regulating valve 9 is an existing device, which adopts the control of the opening degree of the opening and closing parts in the valve body to adjust the flow of the medium, reduces the pressure of the medium, and at the same time adjusts the opening degree of the opening and closing parts by means of the effect of the pressure behind the valve, The function of keeping the pressure after the valve within a certain range, and keeping the outlet pressure within the set range when the inlet pressure is constantly changing.

The exhaust gas outlet of the autoclave 7 is communicated with the steam outlet main pipe 6 through the steam outlet branch pipe 11 and the steam outlet valve 12 (see Figure 1 in the description); the exhaust gas of the autoclave 7 can be controlled through the steam outlet valve 12 during operation.

The steam outlet manifold 6 is communicated with the heating inlet of the steam generator 2 through the switch valve A13 (see Figure 1 in the description); the exhaust gas generated when the autoclave 7 is working can pass through the outlet valve 12, the outlet manifold 6 and the switch valve A13. into the interior of the steam generator 2 .

The steam generator 2 is composed of a main cylinder 19, a steam drum 20, a water supply valve 21, a head 22, a baffle plate 23 and a heat exchange tube 25 (see Figure 2 in the specification).

The upper end of the main cylinder 19 is communicated with a steam drum 20; the steam drum 20 is communicated with the steam inlet manifold 5 through its own steam outlet and the supplementary steam valve 18 (see Figure 1 in the specification). The steam drum 20 has the function of storing steam, and the steam generator 2 can provide boosted steam for the autoclave 7 through the supplementary steam valve 18 , the steam inlet main pipe 5 and the steam inlet branch pipe 10 during operation.

A safety valve 24 is connected and installed on the steam drum 20 (see FIG. 2 in the description). During operation, when the steam pressure in the steam drum 20 is higher than the safe pressure, it will be emptied automatically, so that the purpose of protecting the steam drum 20 can be achieved, and the problem of "burst" of the steam drum 20 due to excessive internal pressure is avoided. .

The interior of the main cylinder body 19 is symmetrically fixed with a packing plate 23; a plurality of heat exchange tubes 25 are installed between the packing plates 23 in a standard shape; a water replenishing valve is connected to the main cylinder 19 between the packing plates 23 21; The water replenishment valve 21 is communicated with the external water source (see Figure 2 in the description); the external water source can provide desalinated water for the steam generator 2 through the replenishment valve 21 during operation.

Both ends of the main cylinder 19 are respectively fixed with heads 22; the head 22 at one end of the main cylinder 19 communicates with the on-off valve A13 through its own heating inlet (see Figures 1 and 2 in the specification); the main cylinder 19 has another One end of the head 22 is connected to the steam outlet main valve 14 through its own heating outlet (see Figures 1 and 2 of the specification).

The main steam outlet valve 14 is communicated with the exhaust gas purification mechanism 4 through the on-off valve B15 (refer to FIG. 1 of the specification). The outlet steam header 6 communicates with the exhaust gas purification mechanism 4 through the discharge valve 17 and the on-off valve B15. During operation, the exhaust gas generated by the autoclave 7 can enter the exhaust gas purification mechanism 4 through the steam outlet main valve 14 and the switch valve B15; it can also directly enter the exhaust gas purification through the steam outlet main pipe 6, the discharge valve 17 and the switch valve B15. Inside the mechanism 4; the exhaust gas purification mechanism 4 has the function of purifying the exhaust gas.

The exhaust gas purification mechanism 4 is composed of a sealed cooling pool 26, a heat dissipation pool 27, a conveying fan 28, a purifier 29 and a spray water pump 30 (refer to the accompanying drawings 3, 4, 5 and 6 of the description).

A sealed cooling pool 26 is provided on the shore of one side of the cooling water pool 27 (see Figures 3 and 4 in the description).

A partition wall 31 is arranged in the middle of the sealed cooling pool 26; the upper surface of the partition wall 31 is sealedly connected with the top of the sealed cooling pool 26; Figures 3 and 4 of the description).

One end of the sealed cooling pool 26 on one side of the partition wall 31 is connected with an air inlet pipe 32, and the air inlet pipe 32 is communicated with the on-off valve B15 (see FIG. 3 in the description). The purpose of setting the sealed cooling pool 26 in this way is to make the tail gas of the autoclaved sand aerated block brick autoclave enter the sealed cooling pool 26 through the air inlet pipe 32, and then it can go around under the guidance of its own pressure and the partition wall 31. It moves along the partition wall 31, thereby increasing the moving area of the autoclaved tail gas of the autoclaved sand aerated block brick in the sealed cooling pool 26, which is convenient for the sealed cooling pool 26 to pass the spray branch pipe 35 to the autoclaved sand aerated building block. The exhaust gas of the block brick autoclave is cooled and cooled, which enhances the cooling effect.

The intake pipe 32 is provided with an exhaust pipe 38 through an exhaust valve 37 (refer to FIG. 2 of the specification). The purpose of setting the air inlet pipe 32 in this way is: to enable the exhaust valve 37 to be opened when the autoclave exhaust gas purification device is required to allow the exhaust gas to be directly discharged through the exhaust pipe 38, so as to achieve the purpose of enhancing the safety of the purification device. .

The inside of the sealed cooling pool 26 on both sides of the partition wall 31 is respectively provided with a spray branch pipe 35; The shower pump 30 communicates with the cooling water pool 27 (see FIG. 3 in the description). When the spray water pump 30 is in operation, the water in the heat dissipation pool 27 can be sprayed to the inside of the sealed cooling pool 26 through the spray main pipe 36 and the spray branch pipe 35, so that heat exchange occurs with the exhaust gas inside the sealed cooling pool 26, thereby To achieve the purpose of cooling the exhaust gas.

An overflow pipe A34 is connected to the side of the sealed cooling pool 26, and the overflow pipe A34 communicates with the cooling water pool 27 (see Figures 3 and 4 in the description). During operation, the water in the sealed cooling pool 26 can overflow into the cooling pool 27 through the overflow pipe A34.

The air intake direction of the air intake pipe 32 is consistent with the lateral direction of the partition wall 31 (see FIG. 3 in the description). The purpose of this setting is: after the autoclaved tail gas of the autoclaved sand aerated block brick enters the sealed cooling pool 26, it can move laterally around the partition wall 31 under the guidance of its own pressure and the partition wall 31; thus Further enhance the circulation path and time of the autoclave tail gas of the autoclaved sand aerated block bricks in the sealed cooling pool 26 to achieve the purpose of enhancing the cooling efficiency of the autoclave tail gas of the autoclaved sand aerated block bricks.

The vertical position of the intake pipe 32 is higher than the vertical position of the overflow pipe A34: because the vertical position of the overflow pipe A34 determines the height of the liquid level in the sealed cooling pool 26, that is, the height of the liquid level in the sealed cooling pool 26 is the same as the height of the liquid level in the sealed cooling pool 26. The vertical position of the overflow pipe A34 is the same; after the position of the intake pipe 32 is set in this way, the exhaust gas entering from the intake pipe 32 can be located above the liquid level of the sealed cooling pool 26; thus avoiding the water in the sealed cooling pool 26 Obstructing the flow of the exhaust gas leads to the poor flow of the exhaust gas, which affects the normal operation of the autoclave 7.

The sealed cooling pool 26 on the other side of the partition wall 31 is connected to the purifier 29 on the sealed cooling pool 26 through an exhaust pipe 33 and a conveying fan 28 (see Figures 3 and 4 in the description). When the conveying fan 28 is in operation, the autoclave exhaust gas in the sealed cooling pool 26 can be conveyed to the purifier 29 through the exhaust pipe 33 for purification treatment.

The purifier 29 is composed of an assembly box 39, a bracket 40 and a shower head 41 (see Figure 6 in the specification); an assembly box 39 is fixed above the cooling pool 27 through the bracket 40 (see Figures 4 and 6 in the specification).

The inside of the assembly box 39 is divided into an air storage chamber 43 and an adsorption chamber 44 by a partition plate 42 (see FIG. 6 in the specification); one side of the air storage chamber 43 is communicated with the outlet of the conveying fan 28; when the conveying fan 28 is working , the autoclave exhaust gas cooled by the sealed cooling pool 26 can be input into the gas storage chamber 43 .

The top of the adsorption chamber 44 is equipped with a sprinkler head 41 , and the sprinkler head 41 communicates with the heat dissipation pool 27 through a pipeline and a sprinkler water pump 30 . When the spray water pump 30 is in operation, the water in the heat dissipation pool 27 can be input into the shower head 41 through the pipeline and output in the manner of spraying.

In the adsorption chamber 44 below the shower head 41, a plurality of activated carbon layers 45 are arranged at intervals through the grid; the partition plate 42 between the activated carbon layers 45 is provided with ventilation holes 46 (see Figure 6 in the description); The autoclaved exhaust gas of the autoclaved sand aerated block brick in the air chamber 43 can enter the space between the activated carbon layers 45 through the ventilation holes 46 .

A diatomite layer 47 is provided below the activated carbon layer 45 ; the assembly box 39 below the diatomite layer 47 is in an open state. The activated carbon layer 45 and the diatomite layer 47 both have strong characteristics of filtering substances and adsorbing substances. When the autoclaved tail gas of the autoclaved sand aerated block brick passes through the activated carbon layer 45 and the diatomite layer 47, the activated carbon layer 45 and the diatomaceous earth layer 47 can absorb the dust and pungent odor in the exhaust gas to achieve the purpose of purifying the exhaust gas.

The main steam outlet valve 14 is communicated with the waste heat utilization mechanism 3 through the switch valve C16 (see Figure 1 in the specification); the waste heat utilization mechanism 3 consists of a sub-cylinder, a heating coil A48, a heating coil B49, a pre-curing chamber 50, and a static stop chamber 51. , a mixing tank 52, a booster pump A53 and a booster pump B54 (see Figures 7 and 8 in the description).

A heating coil A48 and a mixing tank 52 are arranged in the static stop chamber 51; a heating coil B49 is arranged in the pre-curing chamber 50; The pressure pump B54 communicates with one end of the heating coil B49. The other end of the heating coil A48 and the other end of the heating coil B49 communicate with the mixing tank 52 (refer to FIG. 7 of the specification).

Temperature sensors 64 are respectively provided in the pre-curing chamber 50 and the static stop chamber 51; the temperature sensor 64 in the pre-curing chamber 4 is electrically connected with the pressurizing pump B54; the temperature sensor 64 in the static rest chamber 51 is connected with the pressurizing pump A53 electrical connection. The temperature sensor 64 corresponding to the pressurizing pump A53 and the pressurizing pump B54 can control the operating power of the pressurizing pump A53 and the pressurizing pump B54 according to the detected indoor temperature of the static room 51 and the pre-curing chamber 50 (see the appendix of the manual). Figure 7).

The pressurizing pump A53 and the pressurizing pump B54 are located outside the static stop chamber 51: the purpose of this setting is to prevent the pressurizing pump A53 and the pressurizing pump B54 from being in the high temperature environment of the static stop chamber 51 for a long time and affecting their service life. question.

When the mixing tank 52 is in the initial state, a certain amount of circulating water must be injected into it to avoid the problem of "idling" of the booster pump B54 and the booster pump A53.

The upper end of the mixing tank 52 is provided with an overflow pipe B65 (see FIG. 7 in the description). Since the autoclave tail gas will be continuously replenished into the mixing tank 52 during operation, the liquid level in the mixing tank 52 will continue to rise. When the liquid level in the mixing tank 52 rises to a certain height, it will pass through the overflow pipe 28. , overflow into the external water system, and reused after being treated by the external water system.

The mixing tank 52 communicates with the on-off valve C16 through the steam pipe 55 and the sub-cylinder (refer to FIG. 7 in the description). The sub-cylinder is composed of the sub-cylinder body 56 and the steam trap 61 (refer to FIG. 7 of the specification).

One side of the sub-cylinder body 56 is provided with a steam inlet 57, and the sub-cylinder body 56 communicates with the switch valve C16 through the steam inlet 57; the upper end of the sub-cylinder body 56 is provided with a steam outlet 58, and the steam outlet 58 passes through the switch valve D59. The steam transmission pipe 55 is communicated with the mixing tank 52; the lower end of the sub-cylinder body 56 is provided with a drain port 60, and the drain port 60 is connected with a drain valve 61 (see Figures 7 and 8 in the description). The steam trap 61 is an existing device. When there is condensed water in the sub-cylinder body 56, the condensed water can be discharged through the steam trap 61, so that the condensed water can be prevented from being stored in the sub-cylinder body 56 for a long time and the occurrence of "water hammer" accident .

In the sub-cylinder body 56 on the side of the steam inlet 57, a steam blocking plate 63 is fixed in an inclined shape through a supporting plate 62 (see FIG. 8 in the description). The purpose of setting the vapor barrier plate 63 is: when the autoclave exhaust gas passes into the sub-cylinder body 56 through the steam inlet 57, it will be directly sprayed on the vapor barrier plate 63, and under the action of the slope of the vapor barrier plate 63, change The injection direction; in this way, the problem of damaging the sub-cylinder body 56 can be avoided when the externally exhausted steam is directly injected into the sub-cylinder body 56 .

The working method of the autoclaved sand aerated block brick autoclave tail gas treatment device includes the following steps:

(1), perform steam discharge for the autoclave 7 that needs to discharge tail gas:

a. Open the tail gas discharge port of the autoclave 7 and the corresponding steam outlet valve 12; open the switch valve A13, so that the exhaust gas discharged from the autoclave 7 can follow the steam outlet branch pipe 11, the steam outlet valve 12 and the steam outlet main pipe 6 And the on-off valve A13 enters the inside of the head 22 at one end of the steam generator 2 (refer to the accompanying drawings 1 and 2 of the specification);

b. Open the main steam outlet valve 14 and the switch valve C16, so that the exhaust gas entering the inside of the head 22 at one end of the steam generator 2 can pass through the heat exchange tube 25 and enter the inside of the head 22 at the other end of the steam generator 2; then the exhaust gas will Enter the waste heat utilization mechanism 3 along the main steam outlet valve 14 and the switch valve C16; in this process, it is necessary to supply water to the main cylinder 19 through the water replenishment valve 21 at any time; The water in the cylinder 19 is heated to generate steam and stored in the steam drum 20;

c. The exhaust gas will generate a certain amount of condensed water after the heat exchange of the steam generator 2, and the condensed water will be connected with the exhaust gas and enter the waste heat utilization mechanism 3 together; The steam port 57 enters the sub-cylinder body 56; the condensed water entering the sub-cylinder body 56 will be discharged through the steam trap 61; the exhaust gas entering the sub-cylinder body 56 will enter through the switch valve D59 and the steam pipe 55 In the mixed water tank 52; the exhaust gas entering the mixed water tank 52 will be mixed with the circulating water inside it; the temperature of the mixed circulating water will rise; The circulating water is sent to the heating coil A48 and the heating coil B49 respectively to heat the static chamber 51 and the pre-curing chamber 50, and then return to the mixing tank 52 to participate in the circulation again; during the above process, when the temperature in the pre-curing chamber 50 When the sensor 64 senses that the temperature is higher than a certain temperature, the temperature sensor 64 will reduce the circulation speed of the circulating water in the heating coil B49 by reducing the operating power of the pressurizing pump B54. When the sensor 64 senses that the temperature is lower than a certain temperature, the temperature sensor 64 will increase the circulation speed of the circulating water in the heating coil B49 by increasing the operating power of the pressurizing pump B54, so that the inside of the pre-curing chamber 50 is increased. The temperature has been maintained within a certain range; in the same way, the static stop room 51 will control the pressure pump A53 through the temperature sensor 64 to keep the indoor temperature within a certain range;

(2), for the autoclave 7 that needs to be boosted to be boosted and preheated:

a. Open the supplementary steam valve 18 and the steam pressure regulating valve 9 connected with the autoclave 7 that needs to be boosted, so that the steam in the steam drum 20 of the steam generator 2 can pass through the steam inlet main pipe 5, the steam inlet branch pipe 10 and the steam regulator The pressure valve 9 enters into the autoclave 7 for boosting and preheating;

b. The steam in the steam generator 2 enters into the autoclave 7 through the steam pressure regulating valve 9 for boosting and preheating it: if the steam in the steam drum 20 of the steam generator 2 is sufficient, it is necessary to pass the steam The pressure regulating valve 9 adjusts the pressure of the steam entering the autoclave 7 so that the steam can enter the autoclave 7 at a standard pressure to complete the boosting and preheating work; if the steam in the steam drum 20 of the steam generator 2 If the steam is insufficient, the steam source valve 8 needs to be opened, so that the steam in the steam source box 1 can enter the autoclave 7 through the steam inlet main pipe 5, the steam inlet branch pipe 10 and the steam pressure regulating valve 9 for preheating, so as to achieve compensation the purpose of insufficient steam in the steam generator 2;

(3) Handling of abnormality in steam generator 2:

a. When an abnormality occurs in the steam generator 2, firstly close the main steam outlet valve 14, the supplementary steam valve 18, the on-off valve A13 and the water supplement valve 21, so that the steam generator 2 is completely isolated from the outside world, so that it is convenient for people to check the steam generator 2 Carry out maintenance; at the same time open the steam source valve 8 and the discharge valve 17; enable the steam source box 1 to replace the steam generator 2 to provide a boost heat source for the autoclave 7, so that the tail gas in the autoclave 7 can pass through the steam outlet header 6 and the on-off valve C16 enter the interior of the waste heat utilization mechanism 3 to provide a heat source for the heat preservation of the static stop chamber 51 and the pre-curing chamber 50;

b. When the waste heat utilization mechanism 3 cannot consume the exhaust gas discharged from the autoclave 7, open the on-off valve B15, so that part of the exhaust gas discharged from the autoclave 7 can enter the exhaust gas purification along with the discharge valve 17 and the switch valve B15. Outward row in institution 4;

c. After the exhaust gas enters the exhaust gas purification mechanism 4, firstly turn on the spray water pump 30 to provide a spray water source for the spray head 41 in the purifier 29 and the spray branch pipe 35 in the sealed cooling pool 26 through the pipeline Then open the conveying fan 28 to make the exhaust gas enter the sealed cooling pool 26 through the intake pipe 32; then the exhaust gas moves around the partition wall 31 under the guidance of its own pressure and the partition wall 31; in this process, the spray branch pipe 35 is sprayed out The spray water will be mixed with the exhaust gas to exchange heat with it, so as to achieve the effect of spraying, cooling and decompressing the exhaust gas. At the same time, part of the dust in the exhaust gas is dissolved in the water by washing with water, and finally passes through the overflow pipe A34. overflow into the heat dissipation pool 27; when the cooled and decompressed exhaust gas moves to the other side of the partition wall 31, the exhaust gas will enter the gas storage of the purifier 29 through the exhaust pipe 33 under the suction of the conveying fan 28 In the chamber 43; the exhaust gas entering the gas storage chamber 43 enters the space between the activated carbon layers 45 through the ventilation hole 46; in this process, the spray water sprayed by the spray head 41 will be fully mixed with the exhaust gas and After driving it through the activated carbon layer 45 and the diatomite layer 47 together, it falls back into the heat dissipation pool 27; in the process of the exhaust gas passing through the activated carbon layer 45 and the diatomite layer 47 with the spray water, the activated carbon layer 45 and the silicon The algae layer 47 adsorbs the dust and pungent odors in the exhaust gas to achieve the purpose of purifying the exhaust gas;

d. When a plurality of autoclaves 7 discharge the exhaust gas simultaneously, and the pressure in the steam outlet main pipe 6 exceeds the set value, open the exhaust valve 37 in the exhaust gas purification mechanism 4 so that part of the exhaust gas can be discharged through it; When the pressure in the main pipe 6 returns to the normal value, the vent valve 37 can be closed.

The autoclaved sand aerated block brick autoclave tail gas treatment device has a compact structure and ingenious design, and can improve the utilization rate of waste heat of the autoclave tail gas by means of step-by-step utilization on the premise of ensuring the efficient operation of the autoclave. At the same time, it can also purify and recover the exhaust gas, thereby solving the problems of low heat utilization rate, low work efficiency and high failure rate of the existing autoclaved sand aerated block brick autoclave exhaust gas treatment method; The need for the production and use of autoclaved sand aerated block bricks.

Claims (9)

1. An autoclaved sand aerated block brick autoclave tail gas treatment device, comprising a steam source box (1), a steam generator (2), a waste heat utilization mechanism (3), a tail gas purification mechanism (4), a steam inlet A main pipe (5), a steam outlet main pipe (6) and a plurality of autoclaves (7); the steam source box (1) is communicated with the steam inlet main pipe (5) through a steam source valve (8); the steam inlet main pipe ( 5) Connect with the inlet of the autoclave (7) through the steam inlet branch pipe (10) and the steam pressure regulating valve (9); it is characterized in that: the tail gas outlet of the autoclave (7) passes through the steam outlet branch pipe (11). ) and the steam outlet valve (12) are communicated with the steam outlet header (6); the steam outlet header (6) is communicated with the heating inlet of the steam generator (2) through the switch valve A (13); the steam generator (2) ) of the heating outlet is connected with a main steam outlet valve (14) through a pipeline; the main steam outlet valve (14) is communicated with the exhaust gas purification mechanism (4) through an on-off valve B (15); (16) is communicated with the waste heat utilization mechanism (3); the steam outlet of the steam generator (2) is communicated with the steam inlet main pipe (5) through the supplementary steam valve (18); the steam outlet main pipe (6) passes through The discharge valve (17) and the switch valve B (15) communicate with the exhaust gas purification mechanism (4). 2. An autoclaved sand aerated block brick autoclave tail gas treatment device according to claim 1, characterized in that: the steam generator (2) consists of a main cylinder (19), a steam drum ( 20), a water replenishing valve (21), a sealing head (22), a sealing plate (23) and a heat exchange tube (25); a steam drum (20) is communicated with the upper end of the main cylinder (19); The package (20) is communicated with the steam inlet main pipe (5) through its own steam outlet and the supplementary steam valve (18); the interior of the main cylinder (19) is symmetrically fixed with a packing plate (23); the packing plate ( 23) A plurality of heat exchange tubes (25) are installed between them in a standard shape; the main cylinder (19) between the baffle plates (23) is connected with a water replenishment valve (21); the water replenishment valve (21) is connected to the external water source The two ends of the main cylinder (19) are respectively fixed with sealing heads (22); the sealing head (22) at one end of the main cylinder (19) is connected to the on-off valve A through its own heating inlet (13) Communication; the head (22) at the other end of the main cylinder (19) communicates with the steam outlet main valve (14) through its own heating outlet; the steam drum (20) is connected and installed with a safety valve ( twenty four). 3. An autoclaved sand aerated block brick autoclave tail gas treatment device according to claim 1, characterized in that: the tail gas purification mechanism (4) consists of a sealed cooling pool (26), a heat dissipation pool ( 27), a conveying fan (28), a purifier (29) and a spray water pump (30); a sealed cooling pool (26) is provided on the shore of one side of the cooling pool (27); the sealed cooling pool (26) A partition wall (31) is arranged in the middle of the partition wall (31); the upper surface of the partition wall (31) is sealedly connected with the top of the sealed cooling pool (26); There is a certain gap at the end; one end of the sealed cooling pool (26) on one side of the partition wall (31) is connected with an air inlet pipe (32); the air inlet pipe (32) is communicated with the switch valve B (15); The sealed cooling pool (26) on one side is connected to the purifier (29) on the sealed cooling pool (26) through an exhaust pipe (33) and a conveying fan (28); the purifier (29) is connected by pipes and sprays The water pump (30) is communicated with the heat dissipation pool (27); the side of the sealed cooling pool (26) is connected with an overflow pipe A (34), and the overflow pipe A (34) is communicated with the heat dissipation pool (27). 4. An autoclaved sand aerated block brick autoclave tail gas treatment device according to claim 3, characterized in that: the interiors of the sealed cooling pools (26) on both sides of the partition wall (31) are respectively A spray branch pipe (35) is provided; one end of the spray branch pipe (35) is connected with a spray main pipe (36), and one end of the spray main pipe (36) passes through the sealed cooling pool (26) and passes through the pipeline and the spray water pump ( 30) communicates with the cooling pool (27); the air intake direction of the air intake pipe (32) is consistent with the lateral direction of the partition wall (31); the vertical position of the air intake pipe (32) is higher than the overflow pipe A (34) ) in the vertical position; the air intake pipe (32) is provided with an emptying pipe (38) through an emptying valve (37). 5. An autoclaved sand aerated block brick autoclave tail gas treatment device according to claim 4, characterized in that: the purifier (29) is composed of an assembly box (39), a bracket (40) and the sprinkler head (41); an assembly box (39) is fixed above the cooling pool (27) through a bracket (40); the assembly box (39) is divided into parts by a partition plate (42). It is an air storage chamber (43) and an adsorption chamber (44); one side of the air storage chamber (43) is communicated with the outlet of the conveying fan (28); The shower head (41) is communicated with the cooling pool (27) through a pipeline and a spray water pump (30); a plurality of activated carbon layers (45) are arranged at intervals in the adsorption chamber (44) under the shower head (41) through a grid. ; The partition plate (42) between the activated carbon layers (45) is provided with ventilation holes (46); the activated carbon layer (45) is provided with a diatomite layer (47) below; the diatomite layer (47) below The assembly box (39) is open. 6. An autoclaved sand aerated block brick autoclave tail gas treatment device according to claim 1, characterized in that: the waste heat utilization mechanism (3) consists of a sub-cylinder, a heating coil A (48) , Heating coil B (49), pre-curing chamber (50), static stop chamber (51), mixing tank (52), pressurizing pump A (53) and pressurizing pump B (54) are composed: the static A heating coil A (48) and a water mixing tank (52) are arranged in the stopping chamber (51); a heating coil B (49) is arranged in the pre-curing chamber (50); 53) is communicated with one end of the heating coil A (48); the mixing tank (52) is communicated with one end of the heating coil B (49) through the pressurizing pump B (54); the other end of the heating coil A (48) and The other end of the heating coil B (49) communicates with the mixing tank (52); the mixing tank (52) communicates with the switch valve C (16) through the steam pipe (55) and the sub-cylinder. 7 . The autoclaved sand aerated block brick autoclave tail gas treatment device according to claim 6 , wherein the sub-cylinder is composed of a sub-cylinder body ( 56 ) and a steam trap ( 61 ); 8 . One side of the sub-cylinder body (56) is provided with a steam inlet (57), and the sub-cylinder body (56) is communicated with the switching valve C (16) through the steam inlet (57); the upper end of the sub-cylinder body (56) is provided with The steam outlet (58) is communicated with the mixing tank (52) through the switch valve D (59) and the steam pipe (55); the lower end of the sub-cylinder body (56) is provided with a drain port (60) , the drain port (60) is connected with a drain valve (61). 8. An autoclaved sand aerated block brick autoclave tail gas treatment device according to claim 7, characterized in that: the sub-cylinder body (56) on one side of the steam inlet (57) passes through the The support plate (62) is slanted and fixed with a vapor blocking plate (63); temperature sensors (64) are respectively arranged in the pre-curing chamber (50) and the stationary chamber (51); the pre-curing chamber (4) The temperature sensor (64) is electrically connected to the pressurizing pump B (54); the temperature sensor (64) in the static stop chamber (51) is electrically connected to the pressurizing pump A (53); the mixing tank (52) ) is provided with an overflow pipe B (65). 9. a kind of autoclaved sand aerated block brick autoclave tail gas treatment device according to claim 8 is characterized in that: the work of the autoclaved sand aerated block brick autoclave tail gas treatment device The method includes the following steps: (1) For the autoclave (7) that needs to discharge exhaust gas, perform steam discharge: a. Open the tail gas discharge port of the autoclave (7) and the corresponding steam outlet valve (12); open the switch valve A (13), so that the exhaust gas discharged from the autoclave (7) can follow the steam outlet branch pipe (11). ), the steam outlet valve (12), the steam outlet main pipe (6) and the switch valve A (13) enter the inside of the head (22) at one end of the steam generator (2); b. Open the main steam outlet valve (14) and the switch valve C (16), so that the exhaust gas entering the inside of the head (22) at one end of the steam generator (2) can pass through the heat exchange tube (25) and enter the steam generator ( 2) The inside of the other end head (22); then the exhaust gas will enter the inside of the waste heat utilization mechanism (3) along the steam outlet main valve (14) and the switch valve C (16); The main cylinder body (19) is replenished with water through the water replenishment valve (21); so that the exhaust gas can heat the water in the main cylinder body (19) through the heat exchange pipe (25) to generate steam and store it in the steam drum (20); c. The exhaust gas will generate a certain amount of condensed water after heat exchange in the steam generator (2), and the condensed water will be connected with the exhaust gas and enter the waste heat utilization mechanism (3) together; in this process, the exhaust gas and the condensed water will first pass through the switch The valve C (16) and the steam inlet (57) enter into the sub-cylinder body (56); the condensed water entering the sub-cylinder body (56) will be discharged through the steam trap (61); The exhaust gas in 56) will enter the mixing tank (52) through the switch valve D (59) and the steam pipe (55); the exhaust gas entering the mixing tank (52) will be mixed with the circulating water inside; The temperature of the circulating water will rise; during this process, the pressurizing pump A (53) and the pressurizing pump B (54) deliver the heated circulating water to the heating coil A (48) and the heating coil B ( In 49), the static stop chamber (51) and the pre-curing chamber (50) are heated and then returned to the mixing tank (52) to participate in the circulation again; in the above process, when the temperature sensor (64) in the pre-curing chamber (50) ) When sensing that the temperature is higher than a certain temperature, the temperature sensor (64) will reduce the circulation speed of the circulating water in the heating coil B (49) by reducing the operating power of the booster pump B (54), and vice versa. When the temperature sensor (64) in the incubation chamber (50) senses that the temperature is lower than a certain temperature, the temperature sensor (64) will increase the heating coil B by increasing the operating power of the pressurizing pump B (54). (49), so that the temperature in the pre-curing chamber (50) is always maintained within a certain range; in the same way, the static chamber (51) will control the pressure pump through the temperature sensor (64). A (53) method to keep the indoor temperature within a certain range; (2), for the autoclave 7 that needs to be boosted to be boosted and preheated: a. Open the steam supplement valve (18) and the steam pressure regulating valve (9) connected to the autoclave (7) that needs to be boosted, so that the steam in the steam drum (20) of the steam generator (2) can pass through the inlet steam The main pipe (5), the steam inlet branch pipe (10) and the steam pressure regulating valve (9) enter the autoclave (7) for boosting and preheating; b. The steam in the steam generator (2) enters the autoclave (7) through the steam pressure regulating valve (9) for boosting and preheating: if the steam drum (20) of the steam generator (2) If the steam in the Pressure preheating work; if the steam in the steam drum (20) of the steam generator (2) is insufficient, the steam source valve (8) needs to be opened so that the steam in the steam source box (1) can pass through the steam inlet main pipe (5). ), the steam inlet branch pipe (10) and the steam pressure regulating valve (9) enter the autoclave (7) for preheating, so as to achieve the purpose of making up for the lack of steam in the steam generator (2); (3), for the abnormal processing of the steam generator (2): a. When the steam generator (2) is abnormal, first close the main steam outlet valve (14), the supplementary steam valve (18), the switch valve A (13) and the water supplementary valve (21), so that the steam generator (2) It is completely isolated from the outside world, so that it is convenient for people to overhaul the steam generator (2); at the same time, the steam source valve (8) and the discharge valve (17) are opened; so that the steam source box (1) can replace the steam generator (2) Provide a boost heat source for the autoclave (7), so that the tail gas in the autoclave (7) can enter the waste heat utilization mechanism (3) through the steam outlet header (6) and the switch valve C (16), which is a static electricity. The thermal insulation of the stopping room (51) and the pre-curing room (50) provides heat sources; b. When the waste heat utilization mechanism (3) cannot consume the exhaust gas discharged from the autoclave (7), open the on-off valve B (15), so that part of the exhaust gas discharged from the autoclave (7) can follow the discharge valve (17) and the on-off valve B (15) enter the exhaust gas purification mechanism (4) and discharge; c. When the exhaust gas enters the exhaust gas purification mechanism (4), firstly turn on the spray water pump (30), so that it passes through the pipeline to the spray head (41) and the sealed cooling pool (26) in the purifier (29). The spray branch pipe (35) in the cooling water supply provides the spray water source; then the conveying fan (28) is turned on to make the exhaust gas enter the sealed cooling pool (26) through the intake pipe (32); then the exhaust gas is guided by its own pressure and the partition wall (31). It moves around the partition wall (31) under the action; in this process, the spray water sprayed from the spray branch pipe (35) will be mixed with the exhaust gas to exchange heat with it, thus achieving the effect of spraying, cooling and reducing the pressure of the exhaust gas. At the same time, part of the dust in the exhaust gas is dissolved in water by washing with water, and finally overflows into the cooling pool (27) through the overflow pipe A (34); when the exhaust gas after cooling and decompression moves to the partition wall (31) ), the exhaust gas will enter the gas storage chamber (43) of the purifier (29) through the exhaust pipe (33) under the suction of the conveying fan (28); enter the gas storage chamber (43) ) into the space between the activated carbon layers (45) through the ventilation holes (46); during this process, the spray water sprayed by the spray head (41) will be fully mixed with the exhaust gas and drive it together After passing through the activated carbon layer (45) and the diatomite layer (47), it falls back into the cooling pool (27); the exhaust gas passes through the activated carbon layer (45) and the diatomite layer (47) with the spray water Among them, the activated carbon layer (45) and the diatomaceous earth layer (47) adsorb the dust and pungent odor in the exhaust gas to achieve the purpose of purifying the exhaust gas; d. When a plurality of autoclaves (7) discharge the exhaust gas at the same time, and the pressure in the steam outlet main pipe (6) exceeds the set value, open the exhaust valve (37) in the exhaust gas purification mechanism (4) so that part of the exhaust gas can be discharged. Through its external discharge; when the pressure in the steam outlet main pipe (6) returns to the normal value, close the emptying valve (37).

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