Kiln waste gas treatment device for sodium silicate production

Abstract

The utility model belongs to the technical field of industrial dust-containing waste gas treatment, and particularly discloses a kiln waste gas treatment device for sodium silicate production, which comprises a treatment box, a support seat arranged at the bottom of the treatment box, a partition plate arranged in the treatment box, a first induced draft fan mounted on the partition plate and used for dividing the treatment box into a dust removal bin and an adsorption bin, a filter sieve plate is arranged in the dust removal bin, an absorption mechanism and an adsorption mechanism are arranged in the adsorption bin, an ash removal mechanism is arranged on the side, close to the partition plate, of the filter sieve plate and comprises a supporting frame, a knocking block, a first electromagnet and a second electromagnet, and the magnetism of the close faces of the first electromagnet and the second electromagnet is the same and is controlled by the PLC. The dust cleaning mechanism is arranged on one side of the filtering sieve plate, dust attached to the filtering sieve plate can be cleaned while the filtering sieve plate can be periodically beaten, frequent shutdown maintenance work caused by the fact that the filtering sieve plate is blocked by the dust is avoided, the working time of the device is prolonged, and the production efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial dust-containing waste gas treatment, and particularly relates to a waste gas treatment device for a kiln in sodium silicate production. Background Art

[0002] Sodium silicate, commonly known as water glass, is a water-soluble silicate. Its aqueous solution is called water glass, which has the advantages of strong adhesion, high strength, acid resistance, and good heat resistance, and is widely used in analytical reagents, fireproof agents, and adhesives. Industrially, sodium silicate is mainly produced by calcining silica sand and soda ash at a high temperature of 1300 - 1400 °C to produce liquid sodium silicate, which flows out from the kiln outlet, is made into blocks or water-quenched into particles, and then dissolved in high-temperature and high-pressure water to obtain a water glass product. During the calcination process of the sodium silicate kiln, a large amount of dust-containing waste gas will be generated. The composition of the dust-containing waste gas is complex, and direct emission will cause environmental pollution. It is necessary to treat the dust-containing waste gas before emission. The existing kiln waste gas treatment device has the problem that the dust removal net will be blocked by dust after being used for a period of time. When this problem occurs, it is necessary to stop the kiln and the waste gas treatment device for maintenance at the same time, which affects the production efficiency. Therefore, it is necessary to design a waste gas treatment device for a kiln in sodium silicate production that can automatically clean the dust removal net and extend the working time of the device. Content of the Utility Model

[0003] In view of the above technical problems, the utility model provides a waste gas treatment device for a kiln in sodium silicate production that can automatically clean the dust removal net and extend the working time of the device, so as to solve the problem of low production efficiency caused by frequent shutdown maintenance.

[0004] To solve the above technical problems, the technical solution of the utility model is: a waste gas treatment device for a kiln in sodium silicate production, including a treatment box. A support base is fixedly connected to the bottom of the treatment box. A partition plate is fixedly connected inside the treatment box. The partition plate divides the treatment box into a dust removal chamber and an adsorption chamber. A first induced draft fan is installed on the partition plate. One side of the dust removal chamber is communicated with an intake pipe. The upper part of the adsorption chamber is communicated with an exhaust pipe. A filter sieve plate is arranged in the dust removal chamber. An absorption mechanism and an adsorption mechanism are arranged in the adsorption chamber. The filter sieve plate is vertically arranged and fixedly connected to the inner wall of the treatment box. A dust cleaning mechanism is arranged on the side of the filter sieve plate close to the partition plate. The dust cleaning mechanism includes a support frame, a knocking block, a first electromagnet, and a second electromagnet. The support frame is fixedly connected to the inner wall of the treatment box. A movable plate is slidably connected inside the support frame. A return spring is fixedly connected between the movable plate and the support frame. The knocking block and the first electromagnet are both fixedly connected to the movable plate through connecting rods. The second electromagnet is fixedly connected to the side of the filter sieve plate. The magnetic poles of the mutually approaching surfaces of the first electromagnet and the second electromagnet are the same and are both controlled by a PLC controller.

[0005] Further, the absorption mechanism includes a spray pipe and a circulation pump. The spray pipe is located above the first induced draft fan. One end of the spray pipe is fixedly connected to the partition plate, and the other end penetrates through the side wall of the treatment tank and is fixedly connected to the output end of the circulation pump through a pipeline. The circulation pump is fixedly connected to the outer side wall of the treatment tank through a mounting plate. A liquid outlet pipeline is fixedly connected to the lower side of the adsorption bin, and the input end of the circulation pump is communicated with the liquid outlet pipeline.

[0006] Further, the liquid outlet pipeline is fixedly connected to the input end of the circulation pump through a three-way joint. The other branch pipe of the three-way joint is communicated with the liquid supply pipeline of the absorption liquid storage tank. A liquid outlet valve is installed on the liquid outlet pipeline, and a liquid supply valve is installed on the liquid supply pipeline.

[0007] Further, the adsorption mechanism includes a demisting plate and an activated carbon layer. The demisting plate is located above the absorption mechanism, and the activated carbon layer is located above the demisting plate. Both ends of the demisting plate and the activated carbon layer are fixedly connected to the partition plate and the inner wall of the treatment tank respectively. The exhaust pipeline is located above the activated carbon layer and is fixedly connected to the top of the treatment tank.

[0008] Further, a first maintenance door is hinged to the outer side of the treatment tank at a position corresponding to the activated carbon layer.

[0009] Further, a dust collection box is arranged at the lower part of one side of the filter sieve plate close to the air inlet pipeline. A second maintenance door is hinged to the outer side of the treatment tank at a position corresponding to the dust collection box.

[0010] Further, a second induced draft fan is installed on the exhaust pipeline.

[0011] Further, a heat exchange pipeline is wound around the air inlet pipeline.

[0012] Further, a liquid level observation window is installed on the outer side of the treatment tank at a position corresponding to the absorption mechanism.

[0013] The utility model has the following advantages compared with the prior art:

[0014] 1. By arranging a dust cleaning mechanism powered by an electromagnet and a reset spring on one side of the filter sieve plate, the utility model can periodically knock the filter sieve plate and clean the dust attached to the filter sieve plate, avoiding frequent shutdown maintenance caused by the blockage of the filter sieve plate by dust, prolonging the working time of the device, and further improving the production efficiency.

[0015] 2. By setting an absorption mechanism and an adsorption mechanism in the device to jointly remove harmful components in the waste gas, it is possible to prevent the single treatment method from being unable to completely treat the harmful components in the waste gas and prevent environmental pollution caused by the discharged gas; two corresponding maintenance doors are hinged on the treatment box, facilitating the operator to replace the activated carbon layer or clean the accumulated ash; a heat exchange pipe is wound around the intake pipe, which can recover and utilize the waste heat in the waste gas, increasing the energy utilization rate. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the internal structure of the present utility model.

[0017] Figure 2 It is a schematic diagram of the external structure of the present utility model.

[0018] Figure 3 It is a schematic diagram of the ash cleaning mechanism structure of the present utility model.

[0019] In the figure: 1, treatment box; 2, support seat; 3, partition board; 4, intake pipe; 5, exhaust pipe; 6, filter sieve plate; 7, absorption mechanism, 71, spray pipe, 72, circulation pump, 73, liquid outlet pipe; 8, adsorption mechanism, 81, demisting plate, 82, activated carbon layer; 9, ash cleaning mechanism, 91, support frame, 92, knocking block, 93, first electromagnet, 94, second electromagnet, 95, movable plate, 96, return spring; 10, first induced draft fan; 11, liquid supply pipe; 12, liquid supply valve; 13, liquid outlet valve; 14, first maintenance door; 15, dust collection box; 16, second maintenance door; 17, second induced draft fan; 18, heat exchange pipe; 19, liquid level observation window. Detailed Embodiment

[0020] The present utility model will be further described below in conjunction with the drawings.

[0021] Such as Figures 1 to 3A waste gas treatment device for sodium silicate production shown in the figure includes a treatment box 1. A support base 2 is fixedly connected to the bottom of the treatment box 1. A partition plate 3 is fixedly connected inside the treatment box 1. The partition plate 3 divides the treatment box 1 into a dust removal chamber and an adsorption chamber. A first induced draft fan 10 is installed on the partition plate 3, and the output end of the first induced draft fan 10 faces the adsorption chamber. One side of the dust removal chamber is communicated with an intake pipe 4, and the intake pipe 4 is arranged obliquely downward. An exhaust pipe 5 is communicated above the adsorption chamber. A filter sieve plate 6 is arranged in the dust removal chamber, and an absorption mechanism 7 and an adsorption mechanism 8 are arranged in the adsorption chamber. The filter sieve plate 6 is arranged vertically and fixedly connected to the inner wall of the treatment box 1. A dust cleaning mechanism 9 is arranged on the side of the filter sieve plate 6 close to the partition plate 3. The dust cleaning mechanism 9 includes a support frame 91, a knocking block 92, a first electromagnet 93 and a second electromagnet 94. The support frame 91 is fixedly connected to the inner wall of the treatment box 1. A movable plate 95 is slidably connected inside the support frame 91. A return spring 96 is fixedly connected between the movable plate 95 and the support frame 91. The knocking block 92 and the first electromagnet 93 are both fixedly connected to the movable plate 95 through connecting rods. The second electromagnet 94 is fixedly connected to the side of the filter sieve plate 6. The magnetic properties of the mutually approaching surfaces of the first electromagnet 93 and the second electromagnet 94 are the same and are both controlled by a PLC controller.

[0022] In order to utilize the chemical reaction between the absorption liquid and harmful substances in the waste gas to convert them into harmless substances for removal, the absorption mechanism 7 includes a spray pipe 71 and a circulation pump 72. The spray pipe 71 is located above the first induced draft fan 10. One end of the spray pipe 71 is fixedly connected to the partition plate 3, and the other end penetrates through the side wall of the treatment box 1 and is fixedly connected to the output end of the circulation pump 72 through a pipe. The circulation pump 72 is fixedly connected to the outer side wall of the treatment box 1 through a mounting plate. A liquid outlet pipe 73 is fixedly connected below the spray pipe 71 on the lower side of the adsorption chamber. The input end of the circulation pump 72 is communicated with the liquid outlet pipe 73. The circulation pump 72 can continuously transport the absorption liquid in the device from the lower liquid outlet pipe 73 to the upper spray pipe 71, and spray down to fully contact the waste gas to remove harmful substances.

[0023] In order to replace the absorption liquid in the device, the liquid outlet pipe 73 and the input end of the circulation pump 72 are fixedly connected through a three-way joint. The other branch pipe of the three-way joint is fixedly connected to the liquid supply pipe 11 of the absorption liquid storage tank. A liquid outlet valve 13 is installed on the liquid outlet pipe 73, and a liquid supply valve 12 is installed on the liquid supply pipe 11. When it is necessary to replace the absorption liquid in the device, first turn off the circulation pump 72 and the liquid outlet valve 13, open the drain valve of the liquid outlet pipe 73, drain all the absorption liquid in the device and then close the drain valve. Then open the liquid supply valve 12 and the circulation pump 72. The circulation pump pumps the liquid in the absorption liquid storage tank through the liquid supply pipe 11 and the spray pipe 71 into the device. After the liquid injection is completed, open the liquid outlet valve 13 and close the liquid supply valve 12, and the absorption liquid continues to circulate in the device.

[0024] In order to utilize the adsorption effect of activated carbon to adsorb harmful substances in the untreated waste gas in the absorption mechanism on the surface of the adsorbent and remove them, the adsorption mechanism 8 includes a demisting plate 81 and an activated carbon layer 82. The demisting plate 81 is located above the absorption mechanism 7, and the activated carbon layer 82 is located above the demisting plate 81. Both ends of the demisting plate 81 and the activated carbon layer 82 are fixedly connected to the partition plate 3 and the inner wall of the treatment tank 1 respectively. The exhaust pipe 5 is located above the activated carbon layer 82 and is fixedly connected to the top of the treatment tank 1. The demisting plate 81 can remove the water vapor mixed in the waste gas to avoid the water vapor contacting the activated carbon layer 82 and affecting the adsorption effect of the activated carbon layer 82.

[0025] In order to facilitate the operator to replace the activated carbon layer 82, a first maintenance door 14 is hinged on the outer side of the treatment tank 1 at a position corresponding to the activated carbon layer 82.

[0026] In order to collect the dust cleaned from the filter sieve plate 6, a dust collection box 15 is arranged on one side of the filter sieve plate 6 close to the intake pipe 4. In order to facilitate the operator to clean the dust in the dust collection box 15, a second maintenance door 16 is hinged on the outer side of the treatment tank 1 at a position corresponding to the dust collection box 15.

[0027] In order to improve the waste gas treatment efficiency of the device, a second induced draft fan 17 is installed on the exhaust pipe 5. Through the pumping of the second induced draft fan 17, the waste gas circulation speed in the device can be increased.

[0028] In order to recover the waste heat of the waste gas, a heat exchange pipe 18 is wound around the intake pipe 4. The heat exchange medium in the heat exchange pipe 18 is water, and the heat exchange pipe 18 is connected and incorporated into the hot water supply pipeline.

[0029] In order to facilitate the operator to observe the liquid level and turbidity of the liquid in the device, a liquid level observation window 19 is installed on the outer side of the treatment tank 1 at a position corresponding to the absorption mechanism 7.

[0030] The specific working process of the present utility model is as follows:

[0031] Start the first induced draft fan 10 and the second induced draft fan 17, continuously suck the gas in the treatment tank 1, and the kiln waste gas enters the treatment tank 1 through the intake pipe 4. First, the dust in the waste gas is removed through the filter sieve plate 6. The PLC controller controls the periodic power-on and power-off of the first electromagnet 93 and the second electromagnet 94. When the two electromagnets are powered on, the first electromagnet 93 and the second electromagnet 94 separate under the repulsive force of like poles repelling each other, driving the movable plate 95 to move away from the filter sieve plate 6. At the same time, the movable plate 95 compresses the return spring 96. When the two electromagnets are powered off, the repulsive force is lost, and the return spring 96 resets and extends, driving the movable plate 95 to move towards the filter sieve plate 6 until the knocking block 92 knocks on the filter sieve plate 6. Continuously run the program set by the PLC controller to perform periodic power-on and power-off of the first electromagnet 93 and the second electromagnet 94, and the knocking block 92 continuously knocks on the filter sieve plate 6 to remove the dust attached to the filter sieve plate 6. The waste gas from which the dust has been removed is transported to the other side of the partition plate 3 under the action of the two fans, and harmful substances are removed by means of spray alkali washing and activated carbon adsorption, and finally discharged into the air through the exhaust pipe 5.

Claims

1. An apparatus for treating waste gas from a kiln for producing sodium silicate, comprising a treatment tank (1), a support base (2) fixedly connected to the bottom of the treatment tank (1), a partition plate (3) fixedly connected inside the treatment tank (1), the partition plate (3) dividing the treatment tank (1) into a dust removal chamber and an adsorption chamber, a first induced draft fan (10) installed on the partition plate (3), an intake pipe (4) communicating with one side of the dust removal chamber, an exhaust pipe (5) communicating above the adsorption chamber, a filter sieve plate (6) provided in the dust removal chamber, and an absorption mechanism (7) and an adsorption mechanism (8) provided in the adsorption chamber, characterized in that: The filter sieve plate (6) is vertically arranged and fixedly connected to the inner wall of the treatment box (1). A dust cleaning mechanism (9) is arranged on one side of the filter sieve plate (6) close to the partition plate (3). The dust cleaning mechanism (9) includes a support frame (91), a knocking block (92), a first electromagnet (93) and a second electromagnet (94). The support frame (91) is fixedly connected to the inner wall of the treatment box (1). A movable plate (95) is slidably connected in the support frame (91). A return spring (96) is fixedly connected between the movable plate (95) and the support frame (91). The knocking block (92) and the first electromagnet (93) are both fixedly connected to the movable plate (95) through connecting rods. The second electromagnet (94) is fixedly connected to the side of the filter sieve plate (6). The magnetic poles of the mutually approaching surfaces of the first electromagnet (93) and the second electromagnet (94) are the same and are both controlled by a PLC controller.

2. The kiln waste gas treatment device for sodium silicate production according to claim 1, wherein: The absorption mechanism (7) includes a spray pipe (71) and a circulation pump (72). The spray pipe (71) is located above the first induced draft fan (10). One end of the spray pipe (71) is fixedly connected to the partition plate (3), and the other end penetrates through the side wall of the treatment box (1) and is fixedly connected to the output end of the circulation pump (72) through a pipeline. The circulation pump (72) is fixedly connected to the outer side wall of the treatment box (1) through a mounting plate. A liquid outlet pipe (73) is fixedly connected to the lower side of the adsorption bin. The input end of the circulation pump (72) is communicated with the liquid outlet pipe (73).

3. The kiln waste gas treatment device for sodium silicate production according to claim 2, characterized in that: The liquid outlet pipe (73) is fixedly connected to the input end of the circulation pump (72) through a three-way joint. The other branch pipe of the three-way joint is fixedly connected to the liquid supply pipe (11) of the absorption liquid storage tank. A liquid outlet valve (13) is installed on the liquid outlet pipe (73), and a liquid supply valve (12) is installed on the liquid supply pipe (11).

4. The kiln waste gas treatment device for sodium silicate production according to claim 1, characterized in that: The adsorption mechanism (8) includes a demisting plate (81) and an activated carbon layer (82). The demisting plate (81) is located above the absorption mechanism (7), and the activated carbon layer (82) is located above the demisting plate (81). The two ends of the demisting plate (81) and the activated carbon layer (82) are respectively fixedly connected to the partition plate (3) and the inner wall of the treatment box (1). The exhaust pipe (5) is located above the activated carbon layer (82) and is fixedly connected to the top of the treatment box (1).

5. The kiln waste gas treatment device for sodium silicate production according to claim 4, characterized in that: A first maintenance door (14) is hinged at a position on the outer side of the treatment box (1) corresponding to the activated carbon layer (82).

6. The kiln waste gas treatment device for sodium silicate production according to claim 1, characterized in that: A dust collection box (15) is arranged at the lower part on one side of the filter sieve plate (6) close to the air inlet pipe (4). A second maintenance door (16) is hinged at a position on the outer side of the treatment box (1) corresponding to the dust collection box (15).

7. The kiln waste gas treatment device for sodium silicate production according to claim 1, wherein: A second induced draft fan (17) is installed on the exhaust pipe (5).

8. The kiln waste gas treatment device for sodium silicate production according to claim 1, wherein: A heat exchange pipe (18) is wound around the air inlet pipe (4).

9. The kiln waste gas treatment device for sodium silicate production according to claim 1, characterized in that: A liquid level observation window (19) is installed at a position on the outer side of the treatment box (1) corresponding to the absorption mechanism (7).

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